diff --git a/electron/assets/wasm/wasm_video_decode.js b/electron/assets/wasm/wasm_video_decode.js
new file mode 100644
index 0000000..0a2aee2
--- /dev/null
+++ b/electron/assets/wasm/wasm_video_decode.js
@@ -0,0 +1,4707 @@
+
+
+// The Module object: Our interface to the outside world. We import
+// and export values on it. There are various ways Module can be used:
+// 1. Not defined. We create it here
+// 2. A function parameter, function(Module) { ..generated code.. }
+// 3. pre-run appended it, var Module = {}; ..generated code..
+// 4. External script tag defines var Module.
+// We need to check if Module already exists (e.g. case 3 above).
+// Substitution will be replaced with actual code on later stage of the build,
+// this way Closure Compiler will not mangle it (e.g. case 4. above).
+// Note that if you want to run closure, and also to use Module
+// after the generated code, you will need to define   var Module = {};
+// before the code. Then that object will be used in the code, and you
+// can continue to use Module afterwards as well.
+var Module = typeof Module !== 'undefined' ? Module : {};
+
+// --pre-jses are emitted after the Module integration code, so that they can
+// refer to Module (if they choose; they can also define Module)
+// {{PRE_JSES}}
+
+// Sometimes an existing Module object exists with properties
+// meant to overwrite the default module functionality. Here
+// we collect those properties and reapply _after_ we configure
+// the current environment's defaults to avoid having to be so
+// defensive during initialization.
+var moduleOverrides = {};
+var key;
+for (key in Module) {
+  if (Module.hasOwnProperty(key)) {
+    moduleOverrides[key] = Module[key];
+  }
+}
+
+var arguments_ = [];
+var thisProgram = './this.program';
+var quit_ = function(status, toThrow) {
+  throw toThrow;
+};
+
+// Determine the runtime environment we are in. You can customize this by
+// setting the ENVIRONMENT setting at compile time (see settings.js).
+
+var ENVIRONMENT_IS_WEB = false;
+var ENVIRONMENT_IS_WORKER = true;
+var ENVIRONMENT_IS_NODE = false;
+var ENVIRONMENT_IS_SHELL = false;
+
+// `/` should be present at the end if `scriptDirectory` is not empty
+var scriptDirectory = '';
+function locateFile(path) {
+  if (Module['locateFile']) {
+    return Module['locateFile'](path, scriptDirectory);
+  }
+  return scriptDirectory + path;
+}
+
+// Hooks that are implemented differently in different runtime environments.
+var read_,
+    readAsync,
+    readBinary,
+    setWindowTitle;
+
+// Note that this includes Node.js workers when relevant (pthreads is enabled).
+// Node.js workers are detected as a combination of ENVIRONMENT_IS_WORKER and
+// ENVIRONMENT_IS_NODE.
+if (ENVIRONMENT_IS_WEB || ENVIRONMENT_IS_WORKER) {
+  if (ENVIRONMENT_IS_WORKER) { // Check worker, not web, since window could be polyfilled
+    scriptDirectory = self.location.href;
+  } else if (typeof document !== 'undefined' && document.currentScript) { // web
+    scriptDirectory = document.currentScript.src;
+  }
+  // blob urls look like blob:http://site.com/etc/etc and we cannot infer anything from them.
+  // otherwise, slice off the final part of the url to find the script directory.
+  // if scriptDirectory does not contain a slash, lastIndexOf will return -1,
+  // and scriptDirectory will correctly be replaced with an empty string.
+  // If scriptDirectory contains a query (starting with ?) or a fragment (starting with #),
+  // they are removed because they could contain a slash.
+  if (scriptDirectory.indexOf('blob:') !== 0) {
+    scriptDirectory = scriptDirectory.substr(0, scriptDirectory.replace(/[?#].*/, "").lastIndexOf('/')+1);
+  } else {
+    scriptDirectory = '';
+  }
+
+  // Differentiate the Web Worker from the Node Worker case, as reading must
+  // be done differently.
+  {
+
+// include: web_or_worker_shell_read.js
+
+
+  read_ = function(url) {
+      var xhr = new XMLHttpRequest();
+      xhr.open('GET', url, false);
+      xhr.send(null);
+      return xhr.responseText;
+  };
+
+  if (ENVIRONMENT_IS_WORKER) {
+    readBinary = function(url) {
+        var xhr = new XMLHttpRequest();
+        xhr.open('GET', url, false);
+        xhr.responseType = 'arraybuffer';
+        xhr.send(null);
+        return new Uint8Array(/** @type{!ArrayBuffer} */(xhr.response));
+    };
+  }
+
+  readAsync = function(url, onload, onerror) {
+    var xhr = new XMLHttpRequest();
+    xhr.open('GET', url, true);
+    xhr.responseType = 'arraybuffer';
+    xhr.onload = function() {
+      if (xhr.status == 200 || (xhr.status == 0 && xhr.response)) { // file URLs can return 0
+        onload(xhr.response);
+        return;
+      }
+      onerror();
+    };
+    xhr.onerror = onerror;
+    xhr.send(null);
+  };
+
+// end include: web_or_worker_shell_read.js
+  }
+
+  setWindowTitle = function(title) { document.title = title };
+} else
+{
+}
+
+var out = Module['print'] || console.log.bind(console);
+var err = Module['printErr'] || console.warn.bind(console);
+
+// Merge back in the overrides
+for (key in moduleOverrides) {
+  if (moduleOverrides.hasOwnProperty(key)) {
+    Module[key] = moduleOverrides[key];
+  }
+}
+// Free the object hierarchy contained in the overrides, this lets the GC
+// reclaim data used e.g. in memoryInitializerRequest, which is a large typed array.
+moduleOverrides = null;
+
+// Emit code to handle expected values on the Module object. This applies Module.x
+// to the proper local x. This has two benefits: first, we only emit it if it is
+// expected to arrive, and second, by using a local everywhere else that can be
+// minified.
+
+if (Module['arguments']) arguments_ = Module['arguments'];
+
+if (Module['thisProgram']) thisProgram = Module['thisProgram'];
+
+if (Module['quit']) quit_ = Module['quit'];
+
+// perform assertions in shell.js after we set up out() and err(), as otherwise if an assertion fails it cannot print the message
+
+
+
+
+var STACK_ALIGN = 16;
+var POINTER_SIZE = 4;
+
+function getNativeTypeSize(type) {
+  switch (type) {
+    case 'i1': case 'i8': return 1;
+    case 'i16': return 2;
+    case 'i32': return 4;
+    case 'i64': return 8;
+    case 'float': return 4;
+    case 'double': return 8;
+    default: {
+      if (type[type.length-1] === '*') {
+        return POINTER_SIZE;
+      } else if (type[0] === 'i') {
+        var bits = Number(type.substr(1));
+        assert(bits % 8 === 0, 'getNativeTypeSize invalid bits ' + bits + ', type ' + type);
+        return bits / 8;
+      } else {
+        return 0;
+      }
+    }
+  }
+}
+
+function warnOnce(text) {
+  if (!warnOnce.shown) warnOnce.shown = {};
+  if (!warnOnce.shown[text]) {
+    warnOnce.shown[text] = 1;
+    err(text);
+  }
+}
+
+// include: runtime_functions.js
+
+
+// Wraps a JS function as a wasm function with a given signature.
+function convertJsFunctionToWasm(func, sig) {
+
+  // If the type reflection proposal is available, use the new
+  // "WebAssembly.Function" constructor.
+  // Otherwise, construct a minimal wasm module importing the JS function and
+  // re-exporting it.
+  if (typeof WebAssembly.Function === "function") {
+    var typeNames = {
+      'i': 'i32',
+      'j': 'i64',
+      'f': 'f32',
+      'd': 'f64'
+    };
+    var type = {
+      parameters: [],
+      results: sig[0] == 'v' ? [] : [typeNames[sig[0]]]
+    };
+    for (var i = 1; i < sig.length; ++i) {
+      type.parameters.push(typeNames[sig[i]]);
+    }
+    return new WebAssembly.Function(type, func);
+  }
+
+  // The module is static, with the exception of the type section, which is
+  // generated based on the signature passed in.
+  var typeSection = [
+    0x01, // id: section,
+    0x00, // length: 0 (placeholder)
+    0x01, // count: 1
+    0x60, // form: func
+  ];
+  var sigRet = sig.slice(0, 1);
+  var sigParam = sig.slice(1);
+  var typeCodes = {
+    'i': 0x7f, // i32
+    'j': 0x7e, // i64
+    'f': 0x7d, // f32
+    'd': 0x7c, // f64
+  };
+
+  // Parameters, length + signatures
+  typeSection.push(sigParam.length);
+  for (var i = 0; i < sigParam.length; ++i) {
+    typeSection.push(typeCodes[sigParam[i]]);
+  }
+
+  // Return values, length + signatures
+  // With no multi-return in MVP, either 0 (void) or 1 (anything else)
+  if (sigRet == 'v') {
+    typeSection.push(0x00);
+  } else {
+    typeSection = typeSection.concat([0x01, typeCodes[sigRet]]);
+  }
+
+  // Write the overall length of the type section back into the section header
+  // (excepting the 2 bytes for the section id and length)
+  typeSection[1] = typeSection.length - 2;
+
+  // Rest of the module is static
+  var bytes = new Uint8Array([
+    0x00, 0x61, 0x73, 0x6d, // magic ("\0asm")
+    0x01, 0x00, 0x00, 0x00, // version: 1
+  ].concat(typeSection, [
+    0x02, 0x07, // import section
+      // (import "e" "f" (func 0 (type 0)))
+      0x01, 0x01, 0x65, 0x01, 0x66, 0x00, 0x00,
+    0x07, 0x05, // export section
+      // (export "f" (func 0 (type 0)))
+      0x01, 0x01, 0x66, 0x00, 0x00,
+  ]));
+
+   // We can compile this wasm module synchronously because it is very small.
+  // This accepts an import (at "e.f"), that it reroutes to an export (at "f")
+  var module = new WebAssembly.Module(bytes);
+  var instance = new WebAssembly.Instance(module, {
+    'e': {
+      'f': func
+    }
+  });
+  var wrappedFunc = instance.exports['f'];
+  return wrappedFunc;
+}
+
+var freeTableIndexes = [];
+
+// Weak map of functions in the table to their indexes, created on first use.
+var functionsInTableMap;
+
+function getEmptyTableSlot() {
+  // Reuse a free index if there is one, otherwise grow.
+  if (freeTableIndexes.length) {
+    return freeTableIndexes.pop();
+  }
+  // Grow the table
+  try {
+    wasmTable.grow(1);
+  } catch (err) {
+    if (!(err instanceof RangeError)) {
+      throw err;
+    }
+    throw 'Unable to grow wasm table. Set ALLOW_TABLE_GROWTH.';
+  }
+  return wasmTable.length - 1;
+}
+
+function updateTableMap(offset, count) {
+  for (var i = offset; i < offset + count; i++) {
+    var item = getWasmTableEntry(i);
+    // Ignore null values.
+    if (item) {
+      functionsInTableMap.set(item, i);
+    }
+  }
+}
+
+// Add a function to the table.
+// 'sig' parameter is required if the function being added is a JS function.
+function addFunction(func, sig) {
+
+  // Check if the function is already in the table, to ensure each function
+  // gets a unique index. First, create the map if this is the first use.
+  if (!functionsInTableMap) {
+    functionsInTableMap = new WeakMap();
+    updateTableMap(0, wasmTable.length);
+  }
+  if (functionsInTableMap.has(func)) {
+    return functionsInTableMap.get(func);
+  }
+
+  // It's not in the table, add it now.
+
+  var ret = getEmptyTableSlot();
+
+  // Set the new value.
+  try {
+    // Attempting to call this with JS function will cause of table.set() to fail
+    setWasmTableEntry(ret, func);
+  } catch (err) {
+    if (!(err instanceof TypeError)) {
+      throw err;
+    }
+    var wrapped = convertJsFunctionToWasm(func, sig);
+    setWasmTableEntry(ret, wrapped);
+  }
+
+  functionsInTableMap.set(func, ret);
+
+  return ret;
+}
+
+function removeFunction(index) {
+  functionsInTableMap.delete(getWasmTableEntry(index));
+  freeTableIndexes.push(index);
+}
+
+// end include: runtime_functions.js
+// include: runtime_debug.js
+
+
+// end include: runtime_debug.js
+var tempRet0 = 0;
+
+var setTempRet0 = function(value) {
+  tempRet0 = value;
+};
+
+var getTempRet0 = function() {
+  return tempRet0;
+};
+
+
+
+// === Preamble library stuff ===
+
+// Documentation for the public APIs defined in this file must be updated in:
+//    site/source/docs/api_reference/preamble.js.rst
+// A prebuilt local version of the documentation is available at:
+//    site/build/text/docs/api_reference/preamble.js.txt
+// You can also build docs locally as HTML or other formats in site/
+// An online HTML version (which may be of a different version of Emscripten)
+//    is up at http://kripken.github.io/emscripten-site/docs/api_reference/preamble.js.html
+
+var wasmBinary;
+if (Module['wasmBinary']) wasmBinary = Module['wasmBinary'];
+var noExitRuntime = Module['noExitRuntime'] || true;
+
+if (typeof WebAssembly !== 'object') {
+  abort('no native wasm support detected');
+}
+
+// include: runtime_safe_heap.js
+
+
+// In MINIMAL_RUNTIME, setValue() and getValue() are only available when building with safe heap enabled, for heap safety checking.
+// In traditional runtime, setValue() and getValue() are always available (although their use is highly discouraged due to perf penalties)
+
+/** @param {number} ptr
+    @param {number} value
+    @param {string} type
+    @param {number|boolean=} noSafe */
+function setValue(ptr, value, type, noSafe) {
+  type = type || 'i8';
+  if (type.charAt(type.length-1) === '*') type = 'i32';
+    switch (type) {
+      case 'i1': HEAP8[((ptr)>>0)] = value; break;
+      case 'i8': HEAP8[((ptr)>>0)] = value; break;
+      case 'i16': HEAP16[((ptr)>>1)] = value; break;
+      case 'i32': HEAP32[((ptr)>>2)] = value; break;
+      case 'i64': (tempI64 = [value>>>0,(tempDouble=value,(+(Math.abs(tempDouble))) >= 1.0 ? (tempDouble > 0.0 ? ((Math.min((+(Math.floor((tempDouble)/4294967296.0))), 4294967295.0))|0)>>>0 : (~~((+(Math.ceil((tempDouble - +(((~~(tempDouble)))>>>0))/4294967296.0)))))>>>0) : 0)],HEAP32[((ptr)>>2)] = tempI64[0],HEAP32[(((ptr)+(4))>>2)] = tempI64[1]); break;
+      case 'float': HEAPF32[((ptr)>>2)] = value; break;
+      case 'double': HEAPF64[((ptr)>>3)] = value; break;
+      default: abort('invalid type for setValue: ' + type);
+    }
+}
+
+/** @param {number} ptr
+    @param {string} type
+    @param {number|boolean=} noSafe */
+function getValue(ptr, type, noSafe) {
+  type = type || 'i8';
+  if (type.charAt(type.length-1) === '*') type = 'i32';
+    switch (type) {
+      case 'i1': return HEAP8[((ptr)>>0)];
+      case 'i8': return HEAP8[((ptr)>>0)];
+      case 'i16': return HEAP16[((ptr)>>1)];
+      case 'i32': return HEAP32[((ptr)>>2)];
+      case 'i64': return HEAP32[((ptr)>>2)];
+      case 'float': return HEAPF32[((ptr)>>2)];
+      case 'double': return Number(HEAPF64[((ptr)>>3)]);
+      default: abort('invalid type for getValue: ' + type);
+    }
+  return null;
+}
+
+// end include: runtime_safe_heap.js
+// Wasm globals
+
+var wasmMemory;
+
+//========================================
+// Runtime essentials
+//========================================
+
+// whether we are quitting the application. no code should run after this.
+// set in exit() and abort()
+var ABORT = false;
+
+// set by exit() and abort().  Passed to 'onExit' handler.
+// NOTE: This is also used as the process return code code in shell environments
+// but only when noExitRuntime is false.
+var EXITSTATUS;
+
+/** @type {function(*, string=)} */
+function assert(condition, text) {
+  if (!condition) {
+    abort('Assertion failed: ' + text);
+  }
+}
+
+// Returns the C function with a specified identifier (for C++, you need to do manual name mangling)
+function getCFunc(ident) {
+  var func = Module['_' + ident]; // closure exported function
+  assert(func, 'Cannot call unknown function ' + ident + ', make sure it is exported');
+  return func;
+}
+
+// C calling interface.
+/** @param {string|null=} returnType
+    @param {Array=} argTypes
+    @param {Arguments|Array=} args
+    @param {Object=} opts */
+function ccall(ident, returnType, argTypes, args, opts) {
+  // For fast lookup of conversion functions
+  var toC = {
+    'string': function(str) {
+      var ret = 0;
+      if (str !== null && str !== undefined && str !== 0) { // null string
+        // at most 4 bytes per UTF-8 code point, +1 for the trailing '\0'
+        var len = (str.length << 2) + 1;
+        ret = stackAlloc(len);
+        stringToUTF8(str, ret, len);
+      }
+      return ret;
+    },
+    'array': function(arr) {
+      var ret = stackAlloc(arr.length);
+      writeArrayToMemory(arr, ret);
+      return ret;
+    }
+  };
+
+  function convertReturnValue(ret) {
+    if (returnType === 'string') return UTF8ToString(ret);
+    if (returnType === 'boolean') return Boolean(ret);
+    return ret;
+  }
+
+  var func = getCFunc(ident);
+  var cArgs = [];
+  var stack = 0;
+  if (args) {
+    for (var i = 0; i < args.length; i++) {
+      var converter = toC[argTypes[i]];
+      if (converter) {
+        if (stack === 0) stack = stackSave();
+        cArgs[i] = converter(args[i]);
+      } else {
+        cArgs[i] = args[i];
+      }
+    }
+  }
+  var ret = func.apply(null, cArgs);
+  function onDone(ret) {
+    runtimeKeepalivePop();
+    if (stack !== 0) stackRestore(stack);
+    return convertReturnValue(ret);
+  }
+  runtimeKeepalivePush();
+  var asyncMode = opts && opts.async;
+  // Check if we started an async operation just now.
+  if (Asyncify.currData) {
+    // If so, the WASM function ran asynchronous and unwound its stack.
+    // We need to return a Promise that resolves the return value
+    // once the stack is rewound and execution finishes.
+    return Asyncify.whenDone().then(onDone);
+  }
+
+  ret = onDone(ret);
+  // If this is an async ccall, ensure we return a promise
+  if (asyncMode) return Promise.resolve(ret);
+  return ret;
+}
+
+/** @param {string=} returnType
+    @param {Array=} argTypes
+    @param {Object=} opts */
+function cwrap(ident, returnType, argTypes, opts) {
+  argTypes = argTypes || [];
+  // When the function takes numbers and returns a number, we can just return
+  // the original function
+  var numericArgs = argTypes.every(function(type){ return type === 'number'});
+  var numericRet = returnType !== 'string';
+  if (numericRet && numericArgs && !opts) {
+    return getCFunc(ident);
+  }
+  return function() {
+    return ccall(ident, returnType, argTypes, arguments, opts);
+  }
+}
+
+var ALLOC_NORMAL = 0; // Tries to use _malloc()
+var ALLOC_STACK = 1; // Lives for the duration of the current function call
+
+// allocate(): This is for internal use. You can use it yourself as well, but the interface
+//             is a little tricky (see docs right below). The reason is that it is optimized
+//             for multiple syntaxes to save space in generated code. So you should
+//             normally not use allocate(), and instead allocate memory using _malloc(),
+//             initialize it with setValue(), and so forth.
+// @slab: An array of data.
+// @allocator: How to allocate memory, see ALLOC_*
+/** @type {function((Uint8Array|Array<number>), number)} */
+function allocate(slab, allocator) {
+  var ret;
+
+  if (allocator == ALLOC_STACK) {
+    ret = stackAlloc(slab.length);
+  } else {
+    ret = _malloc(slab.length);
+  }
+
+  if (slab.subarray || slab.slice) {
+    HEAPU8.set(/** @type {!Uint8Array} */(slab), ret);
+  } else {
+    HEAPU8.set(new Uint8Array(slab), ret);
+  }
+  return ret;
+}
+
+// include: runtime_strings.js
+
+
+// runtime_strings.js: Strings related runtime functions that are part of both MINIMAL_RUNTIME and regular runtime.
+
+// Given a pointer 'ptr' to a null-terminated UTF8-encoded string in the given array that contains uint8 values, returns
+// a copy of that string as a Javascript String object.
+
+var UTF8Decoder = typeof TextDecoder !== 'undefined' ? new TextDecoder('utf8') : undefined;
+
+/**
+ * @param {number} idx
+ * @param {number=} maxBytesToRead
+ * @return {string}
+ */
+function UTF8ArrayToString(heap, idx, maxBytesToRead) {
+  var endIdx = idx + maxBytesToRead;
+  var endPtr = idx;
+  // TextDecoder needs to know the byte length in advance, it doesn't stop on null terminator by itself.
+  // Also, use the length info to avoid running tiny strings through TextDecoder, since .subarray() allocates garbage.
+  // (As a tiny code save trick, compare endPtr against endIdx using a negation, so that undefined means Infinity)
+  while (heap[endPtr] && !(endPtr >= endIdx)) ++endPtr;
+
+  if (endPtr - idx > 16 && heap.subarray && UTF8Decoder) {
+    return UTF8Decoder.decode(heap.subarray(idx, endPtr));
+  } else {
+    var str = '';
+    // If building with TextDecoder, we have already computed the string length above, so test loop end condition against that
+    while (idx < endPtr) {
+      // For UTF8 byte structure, see:
+      // http://en.wikipedia.org/wiki/UTF-8#Description
+      // https://www.ietf.org/rfc/rfc2279.txt
+      // https://tools.ietf.org/html/rfc3629
+      var u0 = heap[idx++];
+      if (!(u0 & 0x80)) { str += String.fromCharCode(u0); continue; }
+      var u1 = heap[idx++] & 63;
+      if ((u0 & 0xE0) == 0xC0) { str += String.fromCharCode(((u0 & 31) << 6) | u1); continue; }
+      var u2 = heap[idx++] & 63;
+      if ((u0 & 0xF0) == 0xE0) {
+        u0 = ((u0 & 15) << 12) | (u1 << 6) | u2;
+      } else {
+        u0 = ((u0 & 7) << 18) | (u1 << 12) | (u2 << 6) | (heap[idx++] & 63);
+      }
+
+      if (u0 < 0x10000) {
+        str += String.fromCharCode(u0);
+      } else {
+        var ch = u0 - 0x10000;
+        str += String.fromCharCode(0xD800 | (ch >> 10), 0xDC00 | (ch & 0x3FF));
+      }
+    }
+  }
+  return str;
+}
+
+// Given a pointer 'ptr' to a null-terminated UTF8-encoded string in the emscripten HEAP, returns a
+// copy of that string as a Javascript String object.
+// maxBytesToRead: an optional length that specifies the maximum number of bytes to read. You can omit
+//                 this parameter to scan the string until the first \0 byte. If maxBytesToRead is
+//                 passed, and the string at [ptr, ptr+maxBytesToReadr[ contains a null byte in the
+//                 middle, then the string will cut short at that byte index (i.e. maxBytesToRead will
+//                 not produce a string of exact length [ptr, ptr+maxBytesToRead[)
+//                 N.B. mixing frequent uses of UTF8ToString() with and without maxBytesToRead may
+//                 throw JS JIT optimizations off, so it is worth to consider consistently using one
+//                 style or the other.
+/**
+ * @param {number} ptr
+ * @param {number=} maxBytesToRead
+ * @return {string}
+ */
+function UTF8ToString(ptr, maxBytesToRead) {
+  ;
+  return ptr ? UTF8ArrayToString(HEAPU8, ptr, maxBytesToRead) : '';
+}
+
+// Copies the given Javascript String object 'str' to the given byte array at address 'outIdx',
+// encoded in UTF8 form and null-terminated. The copy will require at most str.length*4+1 bytes of space in the HEAP.
+// Use the function lengthBytesUTF8 to compute the exact number of bytes (excluding null terminator) that this function will write.
+// Parameters:
+//   str: the Javascript string to copy.
+//   heap: the array to copy to. Each index in this array is assumed to be one 8-byte element.
+//   outIdx: The starting offset in the array to begin the copying.
+//   maxBytesToWrite: The maximum number of bytes this function can write to the array.
+//                    This count should include the null terminator,
+//                    i.e. if maxBytesToWrite=1, only the null terminator will be written and nothing else.
+//                    maxBytesToWrite=0 does not write any bytes to the output, not even the null terminator.
+// Returns the number of bytes written, EXCLUDING the null terminator.
+
+function stringToUTF8Array(str, heap, outIdx, maxBytesToWrite) {
+  if (!(maxBytesToWrite > 0)) // Parameter maxBytesToWrite is not optional. Negative values, 0, null, undefined and false each don't write out any bytes.
+    return 0;
+
+  var startIdx = outIdx;
+  var endIdx = outIdx + maxBytesToWrite - 1; // -1 for string null terminator.
+  for (var i = 0; i < str.length; ++i) {
+    // Gotcha: charCodeAt returns a 16-bit word that is a UTF-16 encoded code unit, not a Unicode code point of the character! So decode UTF16->UTF32->UTF8.
+    // See http://unicode.org/faq/utf_bom.html#utf16-3
+    // For UTF8 byte structure, see http://en.wikipedia.org/wiki/UTF-8#Description and https://www.ietf.org/rfc/rfc2279.txt and https://tools.ietf.org/html/rfc3629
+    var u = str.charCodeAt(i); // possibly a lead surrogate
+    if (u >= 0xD800 && u <= 0xDFFF) {
+      var u1 = str.charCodeAt(++i);
+      u = 0x10000 + ((u & 0x3FF) << 10) | (u1 & 0x3FF);
+    }
+    if (u <= 0x7F) {
+      if (outIdx >= endIdx) break;
+      heap[outIdx++] = u;
+    } else if (u <= 0x7FF) {
+      if (outIdx + 1 >= endIdx) break;
+      heap[outIdx++] = 0xC0 | (u >> 6);
+      heap[outIdx++] = 0x80 | (u & 63);
+    } else if (u <= 0xFFFF) {
+      if (outIdx + 2 >= endIdx) break;
+      heap[outIdx++] = 0xE0 | (u >> 12);
+      heap[outIdx++] = 0x80 | ((u >> 6) & 63);
+      heap[outIdx++] = 0x80 | (u & 63);
+    } else {
+      if (outIdx + 3 >= endIdx) break;
+      heap[outIdx++] = 0xF0 | (u >> 18);
+      heap[outIdx++] = 0x80 | ((u >> 12) & 63);
+      heap[outIdx++] = 0x80 | ((u >> 6) & 63);
+      heap[outIdx++] = 0x80 | (u & 63);
+    }
+  }
+  // Null-terminate the pointer to the buffer.
+  heap[outIdx] = 0;
+  return outIdx - startIdx;
+}
+
+// Copies the given Javascript String object 'str' to the emscripten HEAP at address 'outPtr',
+// null-terminated and encoded in UTF8 form. The copy will require at most str.length*4+1 bytes of space in the HEAP.
+// Use the function lengthBytesUTF8 to compute the exact number of bytes (excluding null terminator) that this function will write.
+// Returns the number of bytes written, EXCLUDING the null terminator.
+
+function stringToUTF8(str, outPtr, maxBytesToWrite) {
+  return stringToUTF8Array(str, HEAPU8,outPtr, maxBytesToWrite);
+}
+
+// Returns the number of bytes the given Javascript string takes if encoded as a UTF8 byte array, EXCLUDING the null terminator byte.
+function lengthBytesUTF8(str) {
+  var len = 0;
+  for (var i = 0; i < str.length; ++i) {
+    // Gotcha: charCodeAt returns a 16-bit word that is a UTF-16 encoded code unit, not a Unicode code point of the character! So decode UTF16->UTF32->UTF8.
+    // See http://unicode.org/faq/utf_bom.html#utf16-3
+    var u = str.charCodeAt(i); // possibly a lead surrogate
+    if (u >= 0xD800 && u <= 0xDFFF) u = 0x10000 + ((u & 0x3FF) << 10) | (str.charCodeAt(++i) & 0x3FF);
+    if (u <= 0x7F) ++len;
+    else if (u <= 0x7FF) len += 2;
+    else if (u <= 0xFFFF) len += 3;
+    else len += 4;
+  }
+  return len;
+}
+
+// end include: runtime_strings.js
+// include: runtime_strings_extra.js
+
+
+// runtime_strings_extra.js: Strings related runtime functions that are available only in regular runtime.
+
+// Given a pointer 'ptr' to a null-terminated ASCII-encoded string in the emscripten HEAP, returns
+// a copy of that string as a Javascript String object.
+
+function AsciiToString(ptr) {
+  var str = '';
+  while (1) {
+    var ch = HEAPU8[((ptr++)>>0)];
+    if (!ch) return str;
+    str += String.fromCharCode(ch);
+  }
+}
+
+// Copies the given Javascript String object 'str' to the emscripten HEAP at address 'outPtr',
+// null-terminated and encoded in ASCII form. The copy will require at most str.length+1 bytes of space in the HEAP.
+
+function stringToAscii(str, outPtr) {
+  return writeAsciiToMemory(str, outPtr, false);
+}
+
+// Given a pointer 'ptr' to a null-terminated UTF16LE-encoded string in the emscripten HEAP, returns
+// a copy of that string as a Javascript String object.
+
+var UTF16Decoder = typeof TextDecoder !== 'undefined' ? new TextDecoder('utf-16le') : undefined;
+
+function UTF16ToString(ptr, maxBytesToRead) {
+  var endPtr = ptr;
+  // TextDecoder needs to know the byte length in advance, it doesn't stop on null terminator by itself.
+  // Also, use the length info to avoid running tiny strings through TextDecoder, since .subarray() allocates garbage.
+  var idx = endPtr >> 1;
+  var maxIdx = idx + maxBytesToRead / 2;
+  // If maxBytesToRead is not passed explicitly, it will be undefined, and this
+  // will always evaluate to true. This saves on code size.
+  while (!(idx >= maxIdx) && HEAPU16[idx]) ++idx;
+  endPtr = idx << 1;
+
+  if (endPtr - ptr > 32 && UTF16Decoder) {
+    return UTF16Decoder.decode(HEAPU8.subarray(ptr, endPtr));
+  } else {
+    var str = '';
+
+    // If maxBytesToRead is not passed explicitly, it will be undefined, and the for-loop's condition
+    // will always evaluate to true. The loop is then terminated on the first null char.
+    for (var i = 0; !(i >= maxBytesToRead / 2); ++i) {
+      var codeUnit = HEAP16[(((ptr)+(i*2))>>1)];
+      if (codeUnit == 0) break;
+      // fromCharCode constructs a character from a UTF-16 code unit, so we can pass the UTF16 string right through.
+      str += String.fromCharCode(codeUnit);
+    }
+
+    return str;
+  }
+}
+
+// Copies the given Javascript String object 'str' to the emscripten HEAP at address 'outPtr',
+// null-terminated and encoded in UTF16 form. The copy will require at most str.length*4+2 bytes of space in the HEAP.
+// Use the function lengthBytesUTF16() to compute the exact number of bytes (excluding null terminator) that this function will write.
+// Parameters:
+//   str: the Javascript string to copy.
+//   outPtr: Byte address in Emscripten HEAP where to write the string to.
+//   maxBytesToWrite: The maximum number of bytes this function can write to the array. This count should include the null
+//                    terminator, i.e. if maxBytesToWrite=2, only the null terminator will be written and nothing else.
+//                    maxBytesToWrite<2 does not write any bytes to the output, not even the null terminator.
+// Returns the number of bytes written, EXCLUDING the null terminator.
+
+function stringToUTF16(str, outPtr, maxBytesToWrite) {
+  // Backwards compatibility: if max bytes is not specified, assume unsafe unbounded write is allowed.
+  if (maxBytesToWrite === undefined) {
+    maxBytesToWrite = 0x7FFFFFFF;
+  }
+  if (maxBytesToWrite < 2) return 0;
+  maxBytesToWrite -= 2; // Null terminator.
+  var startPtr = outPtr;
+  var numCharsToWrite = (maxBytesToWrite < str.length*2) ? (maxBytesToWrite / 2) : str.length;
+  for (var i = 0; i < numCharsToWrite; ++i) {
+    // charCodeAt returns a UTF-16 encoded code unit, so it can be directly written to the HEAP.
+    var codeUnit = str.charCodeAt(i); // possibly a lead surrogate
+    HEAP16[((outPtr)>>1)] = codeUnit;
+    outPtr += 2;
+  }
+  // Null-terminate the pointer to the HEAP.
+  HEAP16[((outPtr)>>1)] = 0;
+  return outPtr - startPtr;
+}
+
+// Returns the number of bytes the given Javascript string takes if encoded as a UTF16 byte array, EXCLUDING the null terminator byte.
+
+function lengthBytesUTF16(str) {
+  return str.length*2;
+}
+
+function UTF32ToString(ptr, maxBytesToRead) {
+  var i = 0;
+
+  var str = '';
+  // If maxBytesToRead is not passed explicitly, it will be undefined, and this
+  // will always evaluate to true. This saves on code size.
+  while (!(i >= maxBytesToRead / 4)) {
+    var utf32 = HEAP32[(((ptr)+(i*4))>>2)];
+    if (utf32 == 0) break;
+    ++i;
+    // Gotcha: fromCharCode constructs a character from a UTF-16 encoded code (pair), not from a Unicode code point! So encode the code point to UTF-16 for constructing.
+    // See http://unicode.org/faq/utf_bom.html#utf16-3
+    if (utf32 >= 0x10000) {
+      var ch = utf32 - 0x10000;
+      str += String.fromCharCode(0xD800 | (ch >> 10), 0xDC00 | (ch & 0x3FF));
+    } else {
+      str += String.fromCharCode(utf32);
+    }
+  }
+  return str;
+}
+
+// Copies the given Javascript String object 'str' to the emscripten HEAP at address 'outPtr',
+// null-terminated and encoded in UTF32 form. The copy will require at most str.length*4+4 bytes of space in the HEAP.
+// Use the function lengthBytesUTF32() to compute the exact number of bytes (excluding null terminator) that this function will write.
+// Parameters:
+//   str: the Javascript string to copy.
+//   outPtr: Byte address in Emscripten HEAP where to write the string to.
+//   maxBytesToWrite: The maximum number of bytes this function can write to the array. This count should include the null
+//                    terminator, i.e. if maxBytesToWrite=4, only the null terminator will be written and nothing else.
+//                    maxBytesToWrite<4 does not write any bytes to the output, not even the null terminator.
+// Returns the number of bytes written, EXCLUDING the null terminator.
+
+function stringToUTF32(str, outPtr, maxBytesToWrite) {
+  // Backwards compatibility: if max bytes is not specified, assume unsafe unbounded write is allowed.
+  if (maxBytesToWrite === undefined) {
+    maxBytesToWrite = 0x7FFFFFFF;
+  }
+  if (maxBytesToWrite < 4) return 0;
+  var startPtr = outPtr;
+  var endPtr = startPtr + maxBytesToWrite - 4;
+  for (var i = 0; i < str.length; ++i) {
+    // Gotcha: charCodeAt returns a 16-bit word that is a UTF-16 encoded code unit, not a Unicode code point of the character! We must decode the string to UTF-32 to the heap.
+    // See http://unicode.org/faq/utf_bom.html#utf16-3
+    var codeUnit = str.charCodeAt(i); // possibly a lead surrogate
+    if (codeUnit >= 0xD800 && codeUnit <= 0xDFFF) {
+      var trailSurrogate = str.charCodeAt(++i);
+      codeUnit = 0x10000 + ((codeUnit & 0x3FF) << 10) | (trailSurrogate & 0x3FF);
+    }
+    HEAP32[((outPtr)>>2)] = codeUnit;
+    outPtr += 4;
+    if (outPtr + 4 > endPtr) break;
+  }
+  // Null-terminate the pointer to the HEAP.
+  HEAP32[((outPtr)>>2)] = 0;
+  return outPtr - startPtr;
+}
+
+// Returns the number of bytes the given Javascript string takes if encoded as a UTF16 byte array, EXCLUDING the null terminator byte.
+
+function lengthBytesUTF32(str) {
+  var len = 0;
+  for (var i = 0; i < str.length; ++i) {
+    // Gotcha: charCodeAt returns a 16-bit word that is a UTF-16 encoded code unit, not a Unicode code point of the character! We must decode the string to UTF-32 to the heap.
+    // See http://unicode.org/faq/utf_bom.html#utf16-3
+    var codeUnit = str.charCodeAt(i);
+    if (codeUnit >= 0xD800 && codeUnit <= 0xDFFF) ++i; // possibly a lead surrogate, so skip over the tail surrogate.
+    len += 4;
+  }
+
+  return len;
+}
+
+// Allocate heap space for a JS string, and write it there.
+// It is the responsibility of the caller to free() that memory.
+function allocateUTF8(str) {
+  var size = lengthBytesUTF8(str) + 1;
+  var ret = _malloc(size);
+  if (ret) stringToUTF8Array(str, HEAP8, ret, size);
+  return ret;
+}
+
+// Allocate stack space for a JS string, and write it there.
+function allocateUTF8OnStack(str) {
+  var size = lengthBytesUTF8(str) + 1;
+  var ret = stackAlloc(size);
+  stringToUTF8Array(str, HEAP8, ret, size);
+  return ret;
+}
+
+// Deprecated: This function should not be called because it is unsafe and does not provide
+// a maximum length limit of how many bytes it is allowed to write. Prefer calling the
+// function stringToUTF8Array() instead, which takes in a maximum length that can be used
+// to be secure from out of bounds writes.
+/** @deprecated
+    @param {boolean=} dontAddNull */
+function writeStringToMemory(string, buffer, dontAddNull) {
+  warnOnce('writeStringToMemory is deprecated and should not be called! Use stringToUTF8() instead!');
+
+  var /** @type {number} */ lastChar, /** @type {number} */ end;
+  if (dontAddNull) {
+    // stringToUTF8Array always appends null. If we don't want to do that, remember the
+    // character that existed at the location where the null will be placed, and restore
+    // that after the write (below).
+    end = buffer + lengthBytesUTF8(string);
+    lastChar = HEAP8[end];
+  }
+  stringToUTF8(string, buffer, Infinity);
+  if (dontAddNull) HEAP8[end] = lastChar; // Restore the value under the null character.
+}
+
+function writeArrayToMemory(array, buffer) {
+  HEAP8.set(array, buffer);
+}
+
+/** @param {boolean=} dontAddNull */
+function writeAsciiToMemory(str, buffer, dontAddNull) {
+  for (var i = 0; i < str.length; ++i) {
+    HEAP8[((buffer++)>>0)] = str.charCodeAt(i);
+  }
+  // Null-terminate the pointer to the HEAP.
+  if (!dontAddNull) HEAP8[((buffer)>>0)] = 0;
+}
+
+// end include: runtime_strings_extra.js
+// Memory management
+
+function alignUp(x, multiple) {
+  if (x % multiple > 0) {
+    x += multiple - (x % multiple);
+  }
+  return x;
+}
+
+var HEAP,
+/** @type {ArrayBuffer} */
+  buffer,
+/** @type {Int8Array} */
+  HEAP8,
+/** @type {Uint8Array} */
+  HEAPU8,
+/** @type {Int16Array} */
+  HEAP16,
+/** @type {Uint16Array} */
+  HEAPU16,
+/** @type {Int32Array} */
+  HEAP32,
+/** @type {Uint32Array} */
+  HEAPU32,
+/** @type {Float32Array} */
+  HEAPF32,
+/** @type {Float64Array} */
+  HEAPF64;
+
+function updateGlobalBufferAndViews(buf) {
+  buffer = buf;
+  Module['HEAP8'] = HEAP8 = new Int8Array(buf);
+  Module['HEAP16'] = HEAP16 = new Int16Array(buf);
+  Module['HEAP32'] = HEAP32 = new Int32Array(buf);
+  Module['HEAPU8'] = HEAPU8 = new Uint8Array(buf);
+  Module['HEAPU16'] = HEAPU16 = new Uint16Array(buf);
+  Module['HEAPU32'] = HEAPU32 = new Uint32Array(buf);
+  Module['HEAPF32'] = HEAPF32 = new Float32Array(buf);
+  Module['HEAPF64'] = HEAPF64 = new Float64Array(buf);
+}
+
+var TOTAL_STACK = 5242880;
+
+var INITIAL_MEMORY = Module['INITIAL_MEMORY'] || 33554432;
+
+// include: runtime_init_table.js
+// In regular non-RELOCATABLE mode the table is exported
+// from the wasm module and this will be assigned once
+// the exports are available.
+var wasmTable;
+
+// end include: runtime_init_table.js
+// include: runtime_stack_check.js
+
+
+// end include: runtime_stack_check.js
+// include: runtime_assertions.js
+
+
+// end include: runtime_assertions.js
+var __ATPRERUN__  = []; // functions called before the runtime is initialized
+var __ATINIT__    = []; // functions called during startup
+var __ATEXIT__    = []; // functions called during shutdown
+var __ATPOSTRUN__ = []; // functions called after the main() is called
+
+var runtimeInitialized = false;
+var runtimeExited = false;
+var runtimeKeepaliveCounter = 0;
+
+function keepRuntimeAlive() {
+  return noExitRuntime || runtimeKeepaliveCounter > 0;
+}
+
+function preRun() {
+
+  if (Module['preRun']) {
+    if (typeof Module['preRun'] == 'function') Module['preRun'] = [Module['preRun']];
+    while (Module['preRun'].length) {
+      addOnPreRun(Module['preRun'].shift());
+    }
+  }
+
+  callRuntimeCallbacks(__ATPRERUN__);
+}
+
+function initRuntime() {
+  runtimeInitialized = true;
+
+  
+  callRuntimeCallbacks(__ATINIT__);
+}
+
+function exitRuntime() {
+  runtimeExited = true;
+}
+
+function postRun() {
+
+  if (Module['postRun']) {
+    if (typeof Module['postRun'] == 'function') Module['postRun'] = [Module['postRun']];
+    while (Module['postRun'].length) {
+      addOnPostRun(Module['postRun'].shift());
+    }
+  }
+
+  callRuntimeCallbacks(__ATPOSTRUN__);
+}
+
+function addOnPreRun(cb) {
+  __ATPRERUN__.unshift(cb);
+}
+
+function addOnInit(cb) {
+  __ATINIT__.unshift(cb);
+}
+
+function addOnExit(cb) {
+}
+
+function addOnPostRun(cb) {
+  __ATPOSTRUN__.unshift(cb);
+}
+
+// include: runtime_math.js
+
+
+// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/imul
+// || MIN_NODE_VERSION < 0.12
+// check for imul support, and also for correctness ( https://bugs.webkit.org/show_bug.cgi?id=126345 )
+if (!Math.imul || Math.imul(0xffffffff, 5) !== -5) Math.imul = function imul(a, b) {
+  var ah  = a >>> 16;
+  var al = a & 0xffff;
+  var bh  = b >>> 16;
+  var bl = b & 0xffff;
+  return (al*bl + ((ah*bl + al*bh) << 16))|0;
+};
+
+// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/fround
+
+// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/clz32
+
+// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/trunc
+
+// end include: runtime_math.js
+// A counter of dependencies for calling run(). If we need to
+// do asynchronous work before running, increment this and
+// decrement it. Incrementing must happen in a place like
+// Module.preRun (used by emcc to add file preloading).
+// Note that you can add dependencies in preRun, even though
+// it happens right before run - run will be postponed until
+// the dependencies are met.
+var runDependencies = 0;
+var runDependencyWatcher = null;
+var dependenciesFulfilled = null; // overridden to take different actions when all run dependencies are fulfilled
+
+function getUniqueRunDependency(id) {
+  return id;
+}
+
+function addRunDependency(id) {
+  runDependencies++;
+
+  if (Module['monitorRunDependencies']) {
+    Module['monitorRunDependencies'](runDependencies);
+  }
+
+}
+
+function removeRunDependency(id) {
+  runDependencies--;
+
+  if (Module['monitorRunDependencies']) {
+    Module['monitorRunDependencies'](runDependencies);
+  }
+
+  if (runDependencies == 0) {
+    if (runDependencyWatcher !== null) {
+      clearInterval(runDependencyWatcher);
+      runDependencyWatcher = null;
+    }
+    if (dependenciesFulfilled) {
+      var callback = dependenciesFulfilled;
+      dependenciesFulfilled = null;
+      callback(); // can add another dependenciesFulfilled
+    }
+  }
+}
+
+Module["preloadedImages"] = {}; // maps url to image data
+Module["preloadedAudios"] = {}; // maps url to audio data
+
+/** @param {string|number=} what */
+function abort(what) {
+  {
+    if (Module['onAbort']) {
+      Module['onAbort'](what);
+    }
+  }
+
+  what = 'Aborted(' + what + ')';
+  // TODO(sbc): Should we remove printing and leave it up to whoever
+  // catches the exception?
+  err(what);
+
+  ABORT = true;
+  EXITSTATUS = 1;
+
+  what += '. Build with -s ASSERTIONS=1 for more info.';
+
+  // Use a wasm runtime error, because a JS error might be seen as a foreign
+  // exception, which means we'd run destructors on it. We need the error to
+  // simply make the program stop.
+  var e = new WebAssembly.RuntimeError(what);
+
+  // Throw the error whether or not MODULARIZE is set because abort is used
+  // in code paths apart from instantiation where an exception is expected
+  // to be thrown when abort is called.
+  throw e;
+}
+
+// {{MEM_INITIALIZER}}
+
+// include: memoryprofiler.js
+
+
+// end include: memoryprofiler.js
+// include: URIUtils.js
+
+
+// Prefix of data URIs emitted by SINGLE_FILE and related options.
+var dataURIPrefix = 'data:application/octet-stream;base64,';
+
+// Indicates whether filename is a base64 data URI.
+function isDataURI(filename) {
+  // Prefix of data URIs emitted by SINGLE_FILE and related options.
+  return filename.startsWith(dataURIPrefix);
+}
+
+// Indicates whether filename is delivered via file protocol (as opposed to http/https)
+function isFileURI(filename) {
+  return filename.startsWith('file://');
+}
+
+// end include: URIUtils.js
+var wasmBinaryFile = VTS_WASM_URL;
+
+function getBinary(file) {
+  try {
+    if (file == wasmBinaryFile && wasmBinary) {
+      return new Uint8Array(wasmBinary);
+    }
+    if (readBinary) {
+      return readBinary(file);
+    } else {
+      throw "both async and sync fetching of the wasm failed";
+    }
+  }
+  catch (err) {
+    abort(err);
+  }
+}
+
+function getBinaryPromise() {
+  // If we don't have the binary yet, try to to load it asynchronously.
+  // Fetch has some additional restrictions over XHR, like it can't be used on a file:// url.
+  // See https://github.com/github/fetch/pull/92#issuecomment-140665932
+  // Cordova or Electron apps are typically loaded from a file:// url.
+  // So use fetch if it is available and the url is not a file, otherwise fall back to XHR.
+  if (!wasmBinary && (ENVIRONMENT_IS_WEB || ENVIRONMENT_IS_WORKER)) {
+    if (typeof fetch === 'function'
+    ) {
+      return fetch(wasmBinaryFile, { credentials: 'same-origin' }).then(function(response) {
+        if (!response['ok']) {
+          throw "failed to load wasm binary file at '" + wasmBinaryFile + "'";
+        }
+        return response['arrayBuffer']();
+      }).catch(function () {
+          return getBinary(wasmBinaryFile);
+      });
+    }
+  }
+
+  // Otherwise, getBinary should be able to get it synchronously
+  return Promise.resolve().then(function() { return getBinary(wasmBinaryFile); });
+}
+
+// Create the wasm instance.
+// Receives the wasm imports, returns the exports.
+function createWasm() {
+  // prepare imports
+  var info = {
+    'env': asmLibraryArg,
+    'wasi_snapshot_preview1': asmLibraryArg,
+  };
+  // Load the wasm module and create an instance of using native support in the JS engine.
+  // handle a generated wasm instance, receiving its exports and
+  // performing other necessary setup
+  /** @param {WebAssembly.Module=} module*/
+  function receiveInstance(instance, module) {
+    var exports = instance.exports;
+
+    exports = Asyncify.instrumentWasmExports(exports);
+
+    Module['asm'] = exports;
+
+    wasmMemory = Module['asm']['memory'];
+    updateGlobalBufferAndViews(wasmMemory.buffer);
+
+    wasmTable = Module['asm']['__indirect_function_table'];
+
+    addOnInit(Module['asm']['__wasm_call_ctors']);
+
+    removeRunDependency('wasm-instantiate');
+  }
+  // we can't run yet (except in a pthread, where we have a custom sync instantiator)
+  addRunDependency('wasm-instantiate');
+
+  // Prefer streaming instantiation if available.
+  function receiveInstantiationResult(result) {
+    // 'result' is a ResultObject object which has both the module and instance.
+    // receiveInstance() will swap in the exports (to Module.asm) so they can be called
+    // TODO: Due to Closure regression https://github.com/google/closure-compiler/issues/3193, the above line no longer optimizes out down to the following line.
+    // When the regression is fixed, can restore the above USE_PTHREADS-enabled path.
+    receiveInstance(result['instance']);
+  }
+
+  function instantiateArrayBuffer(receiver) {
+    return getBinaryPromise().then(function(binary) {
+      return WebAssembly.instantiate(binary, info);
+    }).then(function (instance) {
+      return instance;
+    }).then(receiver, function(reason) {
+      err('failed to asynchronously prepare wasm: ' + reason);
+
+      abort(reason);
+    });
+  }
+
+  function instantiateAsync() {
+    if (!wasmBinary &&
+        typeof WebAssembly.instantiateStreaming === 'function' &&
+        !isDataURI(wasmBinaryFile) &&
+        typeof fetch === 'function') {
+      return fetch(wasmBinaryFile, { credentials: 'same-origin' }).then(function (response) {
+        var result = WebAssembly.instantiateStreaming(response, info);
+
+        return result.then(
+          receiveInstantiationResult,
+          function(reason) {
+            // We expect the most common failure cause to be a bad MIME type for the binary,
+            // in which case falling back to ArrayBuffer instantiation should work.
+            err('wasm streaming compile failed: ' + reason);
+            err('falling back to ArrayBuffer instantiation');
+            return instantiateArrayBuffer(receiveInstantiationResult);
+          });
+      });
+    } else {
+      return instantiateArrayBuffer(receiveInstantiationResult);
+    }
+  }
+
+  // User shell pages can write their own Module.instantiateWasm = function(imports, successCallback) callback
+  // to manually instantiate the Wasm module themselves. This allows pages to run the instantiation parallel
+  // to any other async startup actions they are performing.
+  if (Module['instantiateWasm']) {
+    try {
+      var exports = Module['instantiateWasm'](info, receiveInstance);
+      exports = Asyncify.instrumentWasmExports(exports);
+      return exports;
+    } catch(e) {
+      err('Module.instantiateWasm callback failed with error: ' + e);
+      return false;
+    }
+  }
+
+  instantiateAsync();
+  return {}; // no exports yet; we'll fill them in later
+}
+
+// Globals used by JS i64 conversions (see makeSetValue)
+var tempDouble;
+var tempI64;
+
+// === Body ===
+
+var ASM_CONSTS = {
+  434420: function($0, $1, $2) {wasm_ffmpeg_error_report($0, $1, $2);},  
+ 434460: function($0, $1) {wasm_isaac_generate($0, $1);},  
+ 434491: function($0, $1, $2) {return wasm_ffmpeg_fwrite($0, $1, $2);},  
+ 434532: function($0, $1) {wasm_ffmpeg_fsize($0, $1);},  
+ 434561: function($0, $1, $2, $3, $4) {wasm_ffmpeg_fseek($0, $1, $2, $3, $4);},  
+ 434602: function($0, $1) {wasm_ffmpeg_fclose($0, $1);}
+};
+function __asyncjs__wasm_ffmpeg_fopen_sync(filename,filelen,acc){ return Asyncify.handleAsync(async () => { const ret = await wasm_ffmpeg_fopen(filename, filelen, acc); return ret; }); }
+function __asyncjs__wasm_ffmpeg_fread_sync(fd,buf,size,ffindex){ return Asyncify.handleAsync(async () => { const ret = await wasm_ffmpeg_fread(fd, buf, size, ffindex); return ret; }); }
+
+
+
+
+
+  function callRuntimeCallbacks(callbacks) {
+      while (callbacks.length > 0) {
+        var callback = callbacks.shift();
+        if (typeof callback == 'function') {
+          callback(Module); // Pass the module as the first argument.
+          continue;
+        }
+        var func = callback.func;
+        if (typeof func === 'number') {
+          if (callback.arg === undefined) {
+            (function() {  dynCall_v.call(null, func); })();
+          } else {
+            (function(a1) {  dynCall_vi.apply(null, [func, a1]); })(callback.arg);
+          }
+        } else {
+          func(callback.arg === undefined ? null : callback.arg);
+        }
+      }
+    }
+
+  function withStackSave(f) {
+      var stack = stackSave();
+      var ret = f();
+      stackRestore(stack);
+      return ret;
+    }
+  function demangle(func) {
+      return func;
+    }
+
+  function demangleAll(text) {
+      var regex =
+        /\b_Z[\w\d_]+/g;
+      return text.replace(regex,
+        function(x) {
+          var y = demangle(x);
+          return x === y ? x : (y + ' [' + x + ']');
+        });
+    }
+
+  var wasmTableMirror = [];
+  function getWasmTableEntry(funcPtr) {
+      var func = wasmTableMirror[funcPtr];
+      if (!func) {
+        if (funcPtr >= wasmTableMirror.length) wasmTableMirror.length = funcPtr + 1;
+        wasmTableMirror[funcPtr] = func = wasmTable.get(funcPtr);
+      }
+      return func;
+    }
+
+  function handleException(e) {
+      // Certain exception types we do not treat as errors since they are used for
+      // internal control flow.
+      // 1. ExitStatus, which is thrown by exit()
+      // 2. "unwind", which is thrown by emscripten_unwind_to_js_event_loop() and others
+      //    that wish to return to JS event loop.
+      if (e instanceof ExitStatus || e == 'unwind') {
+        return EXITSTATUS;
+      }
+      quit_(1, e);
+    }
+
+  function jsStackTrace() {
+      var error = new Error();
+      if (!error.stack) {
+        // IE10+ special cases: It does have callstack info, but it is only populated if an Error object is thrown,
+        // so try that as a special-case.
+        try {
+          throw new Error();
+        } catch(e) {
+          error = e;
+        }
+        if (!error.stack) {
+          return '(no stack trace available)';
+        }
+      }
+      return error.stack.toString();
+    }
+
+  function setWasmTableEntry(idx, func) {
+      wasmTable.set(idx, func);
+      wasmTableMirror[idx] = func;
+    }
+
+  function stackTrace() {
+      var js = jsStackTrace();
+      if (Module['extraStackTrace']) js += '\n' + Module['extraStackTrace']();
+      return demangleAll(js);
+    }
+
+  function ___cxa_allocate_exception(size) {
+      // Thrown object is prepended by exception metadata block
+      return _malloc(size + 16) + 16;
+    }
+
+  function _atexit(func, arg) {
+    }
+  function ___cxa_atexit(a0,a1
+  ) {
+  return _atexit(a0,a1);
+  }
+
+  function ExceptionInfo(excPtr) {
+      this.excPtr = excPtr;
+      this.ptr = excPtr - 16;
+  
+      this.set_type = function(type) {
+        HEAP32[(((this.ptr)+(4))>>2)] = type;
+      };
+  
+      this.get_type = function() {
+        return HEAP32[(((this.ptr)+(4))>>2)];
+      };
+  
+      this.set_destructor = function(destructor) {
+        HEAP32[(((this.ptr)+(8))>>2)] = destructor;
+      };
+  
+      this.get_destructor = function() {
+        return HEAP32[(((this.ptr)+(8))>>2)];
+      };
+  
+      this.set_refcount = function(refcount) {
+        HEAP32[((this.ptr)>>2)] = refcount;
+      };
+  
+      this.set_caught = function (caught) {
+        caught = caught ? 1 : 0;
+        HEAP8[(((this.ptr)+(12))>>0)] = caught;
+      };
+  
+      this.get_caught = function () {
+        return HEAP8[(((this.ptr)+(12))>>0)] != 0;
+      };
+  
+      this.set_rethrown = function (rethrown) {
+        rethrown = rethrown ? 1 : 0;
+        HEAP8[(((this.ptr)+(13))>>0)] = rethrown;
+      };
+  
+      this.get_rethrown = function () {
+        return HEAP8[(((this.ptr)+(13))>>0)] != 0;
+      };
+  
+      // Initialize native structure fields. Should be called once after allocated.
+      this.init = function(type, destructor) {
+        this.set_type(type);
+        this.set_destructor(destructor);
+        this.set_refcount(0);
+        this.set_caught(false);
+        this.set_rethrown(false);
+      }
+  
+      this.add_ref = function() {
+        var value = HEAP32[((this.ptr)>>2)];
+        HEAP32[((this.ptr)>>2)] = value + 1;
+      };
+  
+      // Returns true if last reference released.
+      this.release_ref = function() {
+        var prev = HEAP32[((this.ptr)>>2)];
+        HEAP32[((this.ptr)>>2)] = prev - 1;
+        return prev === 1;
+      };
+    }
+  
+  var exceptionLast = 0;
+  
+  var uncaughtExceptionCount = 0;
+  function ___cxa_throw(ptr, type, destructor) {
+      var info = new ExceptionInfo(ptr);
+      // Initialize ExceptionInfo content after it was allocated in __cxa_allocate_exception.
+      info.init(type, destructor);
+      exceptionLast = ptr;
+      uncaughtExceptionCount++;
+      throw ptr;
+    }
+
+  function _gmtime_r(time, tmPtr) {
+      var date = new Date(HEAP32[((time)>>2)]*1000);
+      HEAP32[((tmPtr)>>2)] = date.getUTCSeconds();
+      HEAP32[(((tmPtr)+(4))>>2)] = date.getUTCMinutes();
+      HEAP32[(((tmPtr)+(8))>>2)] = date.getUTCHours();
+      HEAP32[(((tmPtr)+(12))>>2)] = date.getUTCDate();
+      HEAP32[(((tmPtr)+(16))>>2)] = date.getUTCMonth();
+      HEAP32[(((tmPtr)+(20))>>2)] = date.getUTCFullYear()-1900;
+      HEAP32[(((tmPtr)+(24))>>2)] = date.getUTCDay();
+      HEAP32[(((tmPtr)+(36))>>2)] = 0;
+      HEAP32[(((tmPtr)+(32))>>2)] = 0;
+      var start = Date.UTC(date.getUTCFullYear(), 0, 1, 0, 0, 0, 0);
+      var yday = ((date.getTime() - start) / (1000 * 60 * 60 * 24))|0;
+      HEAP32[(((tmPtr)+(28))>>2)] = yday;
+      // Allocate a string "GMT" for us to point to.
+      if (!_gmtime_r.GMTString) _gmtime_r.GMTString = allocateUTF8("GMT");
+      HEAP32[(((tmPtr)+(40))>>2)] = _gmtime_r.GMTString;
+      return tmPtr;
+    }
+  function ___gmtime_r(a0,a1
+  ) {
+  return _gmtime_r(a0,a1);
+  }
+
+  function _tzset_impl() {
+      var currentYear = new Date().getFullYear();
+      var winter = new Date(currentYear, 0, 1);
+      var summer = new Date(currentYear, 6, 1);
+      var winterOffset = winter.getTimezoneOffset();
+      var summerOffset = summer.getTimezoneOffset();
+  
+      // Local standard timezone offset. Local standard time is not adjusted for daylight savings.
+      // This code uses the fact that getTimezoneOffset returns a greater value during Standard Time versus Daylight Saving Time (DST).
+      // Thus it determines the expected output during Standard Time, and it compares whether the output of the given date the same (Standard) or less (DST).
+      var stdTimezoneOffset = Math.max(winterOffset, summerOffset);
+  
+      // timezone is specified as seconds west of UTC ("The external variable
+      // `timezone` shall be set to the difference, in seconds, between
+      // Coordinated Universal Time (UTC) and local standard time."), the same
+      // as returned by stdTimezoneOffset.
+      // See http://pubs.opengroup.org/onlinepubs/009695399/functions/tzset.html
+      HEAP32[((__get_timezone())>>2)] = stdTimezoneOffset * 60;
+  
+      HEAP32[((__get_daylight())>>2)] = Number(winterOffset != summerOffset);
+  
+      function extractZone(date) {
+        var match = date.toTimeString().match(/\(([A-Za-z ]+)\)$/);
+        return match ? match[1] : "GMT";
+      };
+      var winterName = extractZone(winter);
+      var summerName = extractZone(summer);
+      var winterNamePtr = allocateUTF8(winterName);
+      var summerNamePtr = allocateUTF8(summerName);
+      if (summerOffset < winterOffset) {
+        // Northern hemisphere
+        HEAP32[((__get_tzname())>>2)] = winterNamePtr;
+        HEAP32[(((__get_tzname())+(4))>>2)] = summerNamePtr;
+      } else {
+        HEAP32[((__get_tzname())>>2)] = summerNamePtr;
+        HEAP32[(((__get_tzname())+(4))>>2)] = winterNamePtr;
+      }
+    }
+  function _tzset() {
+      // TODO: Use (malleable) environment variables instead of system settings.
+      if (_tzset.called) return;
+      _tzset.called = true;
+      _tzset_impl();
+    }
+  function _localtime_r(time, tmPtr) {
+      _tzset();
+      var date = new Date(HEAP32[((time)>>2)]*1000);
+      HEAP32[((tmPtr)>>2)] = date.getSeconds();
+      HEAP32[(((tmPtr)+(4))>>2)] = date.getMinutes();
+      HEAP32[(((tmPtr)+(8))>>2)] = date.getHours();
+      HEAP32[(((tmPtr)+(12))>>2)] = date.getDate();
+      HEAP32[(((tmPtr)+(16))>>2)] = date.getMonth();
+      HEAP32[(((tmPtr)+(20))>>2)] = date.getFullYear()-1900;
+      HEAP32[(((tmPtr)+(24))>>2)] = date.getDay();
+  
+      var start = new Date(date.getFullYear(), 0, 1);
+      var yday = ((date.getTime() - start.getTime()) / (1000 * 60 * 60 * 24))|0;
+      HEAP32[(((tmPtr)+(28))>>2)] = yday;
+      HEAP32[(((tmPtr)+(36))>>2)] = -(date.getTimezoneOffset() * 60);
+  
+      // Attention: DST is in December in South, and some regions don't have DST at all.
+      var summerOffset = new Date(date.getFullYear(), 6, 1).getTimezoneOffset();
+      var winterOffset = start.getTimezoneOffset();
+      var dst = (summerOffset != winterOffset && date.getTimezoneOffset() == Math.min(winterOffset, summerOffset))|0;
+      HEAP32[(((tmPtr)+(32))>>2)] = dst;
+  
+      var zonePtr = HEAP32[(((__get_tzname())+(dst ? 4 : 0))>>2)];
+      HEAP32[(((tmPtr)+(40))>>2)] = zonePtr;
+  
+      return tmPtr;
+    }
+  function ___localtime_r(a0,a1
+  ) {
+  return _localtime_r(a0,a1);
+  }
+
+  var SYSCALLS = {mappings:{},buffers:[null,[],[]],printChar:function(stream, curr) {
+        var buffer = SYSCALLS.buffers[stream];
+        if (curr === 0 || curr === 10) {
+          (stream === 1 ? out : err)(UTF8ArrayToString(buffer, 0));
+          buffer.length = 0;
+        } else {
+          buffer.push(curr);
+        }
+      },varargs:undefined,get:function() {
+        SYSCALLS.varargs += 4;
+        var ret = HEAP32[(((SYSCALLS.varargs)-(4))>>2)];
+        return ret;
+      },getStr:function(ptr) {
+        var ret = UTF8ToString(ptr);
+        return ret;
+      },get64:function(low, high) {
+        return low;
+      }};
+  function ___syscall__newselect(nfds, readfds, writefds, exceptfds, timeout) {
+  }
+
+  function setErrNo(value) {
+      HEAP32[((___errno_location())>>2)] = value;
+      return value;
+    }
+  function ___syscall_fcntl64(fd, cmd, varargs) {SYSCALLS.varargs = varargs;
+  
+      return 0;
+    }
+
+  function ___syscall_ioctl(fd, op, varargs) {SYSCALLS.varargs = varargs;
+  
+      return 0;
+    }
+
+  function ___syscall_mkdir(path, mode) {
+      path = SYSCALLS.getStr(path);
+      return SYSCALLS.doMkdir(path, mode);
+    }
+
+  function ___syscall_open(path, flags, varargs) {SYSCALLS.varargs = varargs;
+  
+  }
+
+  function ___syscall_rmdir(path) {
+  }
+
+  function ___syscall_unlink(path) {
+  }
+
+  var structRegistrations = {};
+  
+  function runDestructors(destructors) {
+      while (destructors.length) {
+          var ptr = destructors.pop();
+          var del = destructors.pop();
+          del(ptr);
+      }
+    }
+  
+  function simpleReadValueFromPointer(pointer) {
+      return this['fromWireType'](HEAPU32[pointer >> 2]);
+    }
+  
+  var awaitingDependencies = {};
+  
+  var registeredTypes = {};
+  
+  var typeDependencies = {};
+  
+  var char_0 = 48;
+  
+  var char_9 = 57;
+  function makeLegalFunctionName(name) {
+      if (undefined === name) {
+          return '_unknown';
+      }
+      name = name.replace(/[^a-zA-Z0-9_]/g, '$');
+      var f = name.charCodeAt(0);
+      if (f >= char_0 && f <= char_9) {
+          return '_' + name;
+      } else {
+          return name;
+      }
+    }
+  function createNamedFunction(name, body) {
+      name = makeLegalFunctionName(name);
+      /*jshint evil:true*/
+      return new Function(
+          "body",
+          "return function " + name + "() {\n" +
+          "    \"use strict\";" +
+          "    return body.apply(this, arguments);\n" +
+          "};\n"
+      )(body);
+    }
+  function extendError(baseErrorType, errorName) {
+      var errorClass = createNamedFunction(errorName, function(message) {
+          this.name = errorName;
+          this.message = message;
+  
+          var stack = (new Error(message)).stack;
+          if (stack !== undefined) {
+              this.stack = this.toString() + '\n' +
+                  stack.replace(/^Error(:[^\n]*)?\n/, '');
+          }
+      });
+      errorClass.prototype = Object.create(baseErrorType.prototype);
+      errorClass.prototype.constructor = errorClass;
+      errorClass.prototype.toString = function() {
+          if (this.message === undefined) {
+              return this.name;
+          } else {
+              return this.name + ': ' + this.message;
+          }
+      };
+  
+      return errorClass;
+    }
+  var InternalError = undefined;
+  function throwInternalError(message) {
+      throw new InternalError(message);
+    }
+  function whenDependentTypesAreResolved(myTypes, dependentTypes, getTypeConverters) {
+      myTypes.forEach(function(type) {
+          typeDependencies[type] = dependentTypes;
+      });
+  
+      function onComplete(typeConverters) {
+          var myTypeConverters = getTypeConverters(typeConverters);
+          if (myTypeConverters.length !== myTypes.length) {
+              throwInternalError('Mismatched type converter count');
+          }
+          for (var i = 0; i < myTypes.length; ++i) {
+              registerType(myTypes[i], myTypeConverters[i]);
+          }
+      }
+  
+      var typeConverters = new Array(dependentTypes.length);
+      var unregisteredTypes = [];
+      var registered = 0;
+      dependentTypes.forEach(function(dt, i) {
+          if (registeredTypes.hasOwnProperty(dt)) {
+              typeConverters[i] = registeredTypes[dt];
+          } else {
+              unregisteredTypes.push(dt);
+              if (!awaitingDependencies.hasOwnProperty(dt)) {
+                  awaitingDependencies[dt] = [];
+              }
+              awaitingDependencies[dt].push(function() {
+                  typeConverters[i] = registeredTypes[dt];
+                  ++registered;
+                  if (registered === unregisteredTypes.length) {
+                      onComplete(typeConverters);
+                  }
+              });
+          }
+      });
+      if (0 === unregisteredTypes.length) {
+          onComplete(typeConverters);
+      }
+    }
+  function __embind_finalize_value_object(structType) {
+      var reg = structRegistrations[structType];
+      delete structRegistrations[structType];
+  
+      var rawConstructor = reg.rawConstructor;
+      var rawDestructor = reg.rawDestructor;
+      var fieldRecords = reg.fields;
+      var fieldTypes = fieldRecords.map(function(field) { return field.getterReturnType; }).
+                concat(fieldRecords.map(function(field) { return field.setterArgumentType; }));
+      whenDependentTypesAreResolved([structType], fieldTypes, function(fieldTypes) {
+          var fields = {};
+          fieldRecords.forEach(function(field, i) {
+              var fieldName = field.fieldName;
+              var getterReturnType = fieldTypes[i];
+              var getter = field.getter;
+              var getterContext = field.getterContext;
+              var setterArgumentType = fieldTypes[i + fieldRecords.length];
+              var setter = field.setter;
+              var setterContext = field.setterContext;
+              fields[fieldName] = {
+                  read: function(ptr) {
+                      return getterReturnType['fromWireType'](
+                          getter(getterContext, ptr));
+                  },
+                  write: function(ptr, o) {
+                      var destructors = [];
+                      setter(setterContext, ptr, setterArgumentType['toWireType'](destructors, o));
+                      runDestructors(destructors);
+                  }
+              };
+          });
+  
+          return [{
+              name: reg.name,
+              'fromWireType': function(ptr) {
+                  var rv = {};
+                  for (var i in fields) {
+                      rv[i] = fields[i].read(ptr);
+                  }
+                  rawDestructor(ptr);
+                  return rv;
+              },
+              'toWireType': function(destructors, o) {
+                  // todo: Here we have an opportunity for -O3 level "unsafe" optimizations:
+                  // assume all fields are present without checking.
+                  for (var fieldName in fields) {
+                      if (!(fieldName in o)) {
+                          throw new TypeError('Missing field:  "' + fieldName + '"');
+                      }
+                  }
+                  var ptr = rawConstructor();
+                  for (fieldName in fields) {
+                      fields[fieldName].write(ptr, o[fieldName]);
+                  }
+                  if (destructors !== null) {
+                      destructors.push(rawDestructor, ptr);
+                  }
+                  return ptr;
+              },
+              'argPackAdvance': 8,
+              'readValueFromPointer': simpleReadValueFromPointer,
+              destructorFunction: rawDestructor,
+          }];
+      });
+    }
+
+  function __embind_register_bigint(primitiveType, name, size, minRange, maxRange) {}
+
+  function getShiftFromSize(size) {
+      
+      switch (size) {
+          case 1: return 0;
+          case 2: return 1;
+          case 4: return 2;
+          case 8: return 3;
+          default:
+              throw new TypeError('Unknown type size: ' + size);
+      }
+    }
+  
+  function embind_init_charCodes() {
+      var codes = new Array(256);
+      for (var i = 0; i < 256; ++i) {
+          codes[i] = String.fromCharCode(i);
+      }
+      embind_charCodes = codes;
+    }
+  var embind_charCodes = undefined;
+  function readLatin1String(ptr) {
+      var ret = "";
+      var c = ptr;
+      while (HEAPU8[c]) {
+          ret += embind_charCodes[HEAPU8[c++]];
+      }
+      return ret;
+    }
+  
+  var BindingError = undefined;
+  function throwBindingError(message) {
+      throw new BindingError(message);
+    }
+  /** @param {Object=} options */
+  function registerType(rawType, registeredInstance, options) {
+      options = options || {};
+  
+      if (!('argPackAdvance' in registeredInstance)) {
+          throw new TypeError('registerType registeredInstance requires argPackAdvance');
+      }
+  
+      var name = registeredInstance.name;
+      if (!rawType) {
+          throwBindingError('type "' + name + '" must have a positive integer typeid pointer');
+      }
+      if (registeredTypes.hasOwnProperty(rawType)) {
+          if (options.ignoreDuplicateRegistrations) {
+              return;
+          } else {
+              throwBindingError("Cannot register type '" + name + "' twice");
+          }
+      }
+  
+      registeredTypes[rawType] = registeredInstance;
+      delete typeDependencies[rawType];
+  
+      if (awaitingDependencies.hasOwnProperty(rawType)) {
+          var callbacks = awaitingDependencies[rawType];
+          delete awaitingDependencies[rawType];
+          callbacks.forEach(function(cb) {
+              cb();
+          });
+      }
+    }
+  function __embind_register_bool(rawType, name, size, trueValue, falseValue) {
+      var shift = getShiftFromSize(size);
+  
+      name = readLatin1String(name);
+      registerType(rawType, {
+          name: name,
+          'fromWireType': function(wt) {
+              // ambiguous emscripten ABI: sometimes return values are
+              // true or false, and sometimes integers (0 or 1)
+              return !!wt;
+          },
+          'toWireType': function(destructors, o) {
+              return o ? trueValue : falseValue;
+          },
+          'argPackAdvance': 8,
+          'readValueFromPointer': function(pointer) {
+              // TODO: if heap is fixed (like in asm.js) this could be executed outside
+              var heap;
+              if (size === 1) {
+                  heap = HEAP8;
+              } else if (size === 2) {
+                  heap = HEAP16;
+              } else if (size === 4) {
+                  heap = HEAP32;
+              } else {
+                  throw new TypeError("Unknown boolean type size: " + name);
+              }
+              return this['fromWireType'](heap[pointer >> shift]);
+          },
+          destructorFunction: null, // This type does not need a destructor
+      });
+    }
+
+  function ClassHandle_isAliasOf(other) {
+      if (!(this instanceof ClassHandle)) {
+          return false;
+      }
+      if (!(other instanceof ClassHandle)) {
+          return false;
+      }
+  
+      var leftClass = this.$$.ptrType.registeredClass;
+      var left = this.$$.ptr;
+      var rightClass = other.$$.ptrType.registeredClass;
+      var right = other.$$.ptr;
+  
+      while (leftClass.baseClass) {
+          left = leftClass.upcast(left);
+          leftClass = leftClass.baseClass;
+      }
+  
+      while (rightClass.baseClass) {
+          right = rightClass.upcast(right);
+          rightClass = rightClass.baseClass;
+      }
+  
+      return leftClass === rightClass && left === right;
+    }
+  
+  function shallowCopyInternalPointer(o) {
+      return {
+          count: o.count,
+          deleteScheduled: o.deleteScheduled,
+          preservePointerOnDelete: o.preservePointerOnDelete,
+          ptr: o.ptr,
+          ptrType: o.ptrType,
+          smartPtr: o.smartPtr,
+          smartPtrType: o.smartPtrType,
+      };
+    }
+  
+  function throwInstanceAlreadyDeleted(obj) {
+      function getInstanceTypeName(handle) {
+        return handle.$$.ptrType.registeredClass.name;
+      }
+      throwBindingError(getInstanceTypeName(obj) + ' instance already deleted');
+    }
+  
+  var finalizationGroup = false;
+  
+  function detachFinalizer(handle) {}
+  
+  function runDestructor($$) {
+      if ($$.smartPtr) {
+          $$.smartPtrType.rawDestructor($$.smartPtr);
+      } else {
+          $$.ptrType.registeredClass.rawDestructor($$.ptr);
+      }
+    }
+  function releaseClassHandle($$) {
+      $$.count.value -= 1;
+      var toDelete = 0 === $$.count.value;
+      if (toDelete) {
+          runDestructor($$);
+      }
+    }
+  function attachFinalizer(handle) {
+      if ('undefined' === typeof FinalizationGroup) {
+          attachFinalizer = function (handle) { return handle; };
+          return handle;
+      }
+      // If the running environment has a FinalizationGroup (see
+      // https://github.com/tc39/proposal-weakrefs), then attach finalizers
+      // for class handles.  We check for the presence of FinalizationGroup
+      // at run-time, not build-time.
+      finalizationGroup = new FinalizationGroup(function (iter) {
+          for (var result = iter.next(); !result.done; result = iter.next()) {
+              var $$ = result.value;
+              if (!$$.ptr) {
+                  console.warn('object already deleted: ' + $$.ptr);
+              } else {
+                  releaseClassHandle($$);
+              }
+          }
+      });
+      attachFinalizer = function(handle) {
+          finalizationGroup.register(handle, handle.$$, handle.$$);
+          return handle;
+      };
+      detachFinalizer = function(handle) {
+          finalizationGroup.unregister(handle.$$);
+      };
+      return attachFinalizer(handle);
+    }
+  function ClassHandle_clone() {
+      if (!this.$$.ptr) {
+          throwInstanceAlreadyDeleted(this);
+      }
+  
+      if (this.$$.preservePointerOnDelete) {
+          this.$$.count.value += 1;
+          return this;
+      } else {
+          var clone = attachFinalizer(Object.create(Object.getPrototypeOf(this), {
+              $$: {
+                  value: shallowCopyInternalPointer(this.$$),
+              }
+          }));
+  
+          clone.$$.count.value += 1;
+          clone.$$.deleteScheduled = false;
+          return clone;
+      }
+    }
+  
+  function ClassHandle_delete() {
+      if (!this.$$.ptr) {
+          throwInstanceAlreadyDeleted(this);
+      }
+  
+      if (this.$$.deleteScheduled && !this.$$.preservePointerOnDelete) {
+          throwBindingError('Object already scheduled for deletion');
+      }
+  
+      detachFinalizer(this);
+      releaseClassHandle(this.$$);
+  
+      if (!this.$$.preservePointerOnDelete) {
+          this.$$.smartPtr = undefined;
+          this.$$.ptr = undefined;
+      }
+    }
+  
+  function ClassHandle_isDeleted() {
+      return !this.$$.ptr;
+    }
+  
+  var delayFunction = undefined;
+  
+  var deletionQueue = [];
+  
+  function flushPendingDeletes() {
+      while (deletionQueue.length) {
+          var obj = deletionQueue.pop();
+          obj.$$.deleteScheduled = false;
+          obj['delete']();
+      }
+    }
+  function ClassHandle_deleteLater() {
+      if (!this.$$.ptr) {
+          throwInstanceAlreadyDeleted(this);
+      }
+      if (this.$$.deleteScheduled && !this.$$.preservePointerOnDelete) {
+          throwBindingError('Object already scheduled for deletion');
+      }
+      deletionQueue.push(this);
+      if (deletionQueue.length === 1 && delayFunction) {
+          delayFunction(flushPendingDeletes);
+      }
+      this.$$.deleteScheduled = true;
+      return this;
+    }
+  function init_ClassHandle() {
+      ClassHandle.prototype['isAliasOf'] = ClassHandle_isAliasOf;
+      ClassHandle.prototype['clone'] = ClassHandle_clone;
+      ClassHandle.prototype['delete'] = ClassHandle_delete;
+      ClassHandle.prototype['isDeleted'] = ClassHandle_isDeleted;
+      ClassHandle.prototype['deleteLater'] = ClassHandle_deleteLater;
+    }
+  function ClassHandle() {
+    }
+  
+  var registeredPointers = {};
+  
+  function ensureOverloadTable(proto, methodName, humanName) {
+      if (undefined === proto[methodName].overloadTable) {
+          var prevFunc = proto[methodName];
+          // Inject an overload resolver function that routes to the appropriate overload based on the number of arguments.
+          proto[methodName] = function() {
+              // TODO This check can be removed in -O3 level "unsafe" optimizations.
+              if (!proto[methodName].overloadTable.hasOwnProperty(arguments.length)) {
+                  throwBindingError("Function '" + humanName + "' called with an invalid number of arguments (" + arguments.length + ") - expects one of (" + proto[methodName].overloadTable + ")!");
+              }
+              return proto[methodName].overloadTable[arguments.length].apply(this, arguments);
+          };
+          // Move the previous function into the overload table.
+          proto[methodName].overloadTable = [];
+          proto[methodName].overloadTable[prevFunc.argCount] = prevFunc;
+      }
+    }
+  /** @param {number=} numArguments */
+  function exposePublicSymbol(name, value, numArguments) {
+      if (Module.hasOwnProperty(name)) {
+          if (undefined === numArguments || (undefined !== Module[name].overloadTable && undefined !== Module[name].overloadTable[numArguments])) {
+              throwBindingError("Cannot register public name '" + name + "' twice");
+          }
+  
+          // We are exposing a function with the same name as an existing function. Create an overload table and a function selector
+          // that routes between the two.
+          ensureOverloadTable(Module, name, name);
+          if (Module.hasOwnProperty(numArguments)) {
+              throwBindingError("Cannot register multiple overloads of a function with the same number of arguments (" + numArguments + ")!");
+          }
+          // Add the new function into the overload table.
+          Module[name].overloadTable[numArguments] = value;
+      }
+      else {
+          Module[name] = value;
+          if (undefined !== numArguments) {
+              Module[name].numArguments = numArguments;
+          }
+      }
+    }
+  
+  /** @constructor */
+  function RegisteredClass(
+      name,
+      constructor,
+      instancePrototype,
+      rawDestructor,
+      baseClass,
+      getActualType,
+      upcast,
+      downcast
+    ) {
+      this.name = name;
+      this.constructor = constructor;
+      this.instancePrototype = instancePrototype;
+      this.rawDestructor = rawDestructor;
+      this.baseClass = baseClass;
+      this.getActualType = getActualType;
+      this.upcast = upcast;
+      this.downcast = downcast;
+      this.pureVirtualFunctions = [];
+    }
+  
+  function upcastPointer(ptr, ptrClass, desiredClass) {
+      while (ptrClass !== desiredClass) {
+          if (!ptrClass.upcast) {
+              throwBindingError("Expected null or instance of " + desiredClass.name + ", got an instance of " + ptrClass.name);
+          }
+          ptr = ptrClass.upcast(ptr);
+          ptrClass = ptrClass.baseClass;
+      }
+      return ptr;
+    }
+  function constNoSmartPtrRawPointerToWireType(destructors, handle) {
+      if (handle === null) {
+          if (this.isReference) {
+              throwBindingError('null is not a valid ' + this.name);
+          }
+          return 0;
+      }
+  
+      if (!handle.$$) {
+          throwBindingError('Cannot pass "' + _embind_repr(handle) + '" as a ' + this.name);
+      }
+      if (!handle.$$.ptr) {
+          throwBindingError('Cannot pass deleted object as a pointer of type ' + this.name);
+      }
+      var handleClass = handle.$$.ptrType.registeredClass;
+      var ptr = upcastPointer(handle.$$.ptr, handleClass, this.registeredClass);
+      return ptr;
+    }
+  
+  function genericPointerToWireType(destructors, handle) {
+      var ptr;
+      if (handle === null) {
+          if (this.isReference) {
+              throwBindingError('null is not a valid ' + this.name);
+          }
+  
+          if (this.isSmartPointer) {
+              ptr = this.rawConstructor();
+              if (destructors !== null) {
+                  destructors.push(this.rawDestructor, ptr);
+              }
+              return ptr;
+          } else {
+              return 0;
+          }
+      }
+  
+      if (!handle.$$) {
+          throwBindingError('Cannot pass "' + _embind_repr(handle) + '" as a ' + this.name);
+      }
+      if (!handle.$$.ptr) {
+          throwBindingError('Cannot pass deleted object as a pointer of type ' + this.name);
+      }
+      if (!this.isConst && handle.$$.ptrType.isConst) {
+          throwBindingError('Cannot convert argument of type ' + (handle.$$.smartPtrType ? handle.$$.smartPtrType.name : handle.$$.ptrType.name) + ' to parameter type ' + this.name);
+      }
+      var handleClass = handle.$$.ptrType.registeredClass;
+      ptr = upcastPointer(handle.$$.ptr, handleClass, this.registeredClass);
+  
+      if (this.isSmartPointer) {
+          // TODO: this is not strictly true
+          // We could support BY_EMVAL conversions from raw pointers to smart pointers
+          // because the smart pointer can hold a reference to the handle
+          if (undefined === handle.$$.smartPtr) {
+              throwBindingError('Passing raw pointer to smart pointer is illegal');
+          }
+  
+          switch (this.sharingPolicy) {
+              case 0: // NONE
+                  // no upcasting
+                  if (handle.$$.smartPtrType === this) {
+                      ptr = handle.$$.smartPtr;
+                  } else {
+                      throwBindingError('Cannot convert argument of type ' + (handle.$$.smartPtrType ? handle.$$.smartPtrType.name : handle.$$.ptrType.name) + ' to parameter type ' + this.name);
+                  }
+                  break;
+  
+              case 1: // INTRUSIVE
+                  ptr = handle.$$.smartPtr;
+                  break;
+  
+              case 2: // BY_EMVAL
+                  if (handle.$$.smartPtrType === this) {
+                      ptr = handle.$$.smartPtr;
+                  } else {
+                      var clonedHandle = handle['clone']();
+                      ptr = this.rawShare(
+                          ptr,
+                          Emval.toHandle(function() {
+                              clonedHandle['delete']();
+                          })
+                      );
+                      if (destructors !== null) {
+                          destructors.push(this.rawDestructor, ptr);
+                      }
+                  }
+                  break;
+  
+              default:
+                  throwBindingError('Unsupporting sharing policy');
+          }
+      }
+      return ptr;
+    }
+  
+  function nonConstNoSmartPtrRawPointerToWireType(destructors, handle) {
+      if (handle === null) {
+          if (this.isReference) {
+              throwBindingError('null is not a valid ' + this.name);
+          }
+          return 0;
+      }
+  
+      if (!handle.$$) {
+          throwBindingError('Cannot pass "' + _embind_repr(handle) + '" as a ' + this.name);
+      }
+      if (!handle.$$.ptr) {
+          throwBindingError('Cannot pass deleted object as a pointer of type ' + this.name);
+      }
+      if (handle.$$.ptrType.isConst) {
+          throwBindingError('Cannot convert argument of type ' + handle.$$.ptrType.name + ' to parameter type ' + this.name);
+      }
+      var handleClass = handle.$$.ptrType.registeredClass;
+      var ptr = upcastPointer(handle.$$.ptr, handleClass, this.registeredClass);
+      return ptr;
+    }
+  
+  function RegisteredPointer_getPointee(ptr) {
+      if (this.rawGetPointee) {
+          ptr = this.rawGetPointee(ptr);
+      }
+      return ptr;
+    }
+  
+  function RegisteredPointer_destructor(ptr) {
+      if (this.rawDestructor) {
+          this.rawDestructor(ptr);
+      }
+    }
+  
+  function RegisteredPointer_deleteObject(handle) {
+      if (handle !== null) {
+          handle['delete']();
+      }
+    }
+  
+  function downcastPointer(ptr, ptrClass, desiredClass) {
+      if (ptrClass === desiredClass) {
+          return ptr;
+      }
+      if (undefined === desiredClass.baseClass) {
+          return null; // no conversion
+      }
+  
+      var rv = downcastPointer(ptr, ptrClass, desiredClass.baseClass);
+      if (rv === null) {
+          return null;
+      }
+      return desiredClass.downcast(rv);
+    }
+  
+  function getInheritedInstanceCount() {
+      return Object.keys(registeredInstances).length;
+    }
+  
+  function getLiveInheritedInstances() {
+      var rv = [];
+      for (var k in registeredInstances) {
+          if (registeredInstances.hasOwnProperty(k)) {
+              rv.push(registeredInstances[k]);
+          }
+      }
+      return rv;
+    }
+  
+  function setDelayFunction(fn) {
+      delayFunction = fn;
+      if (deletionQueue.length && delayFunction) {
+          delayFunction(flushPendingDeletes);
+      }
+    }
+  function init_embind() {
+      Module['getInheritedInstanceCount'] = getInheritedInstanceCount;
+      Module['getLiveInheritedInstances'] = getLiveInheritedInstances;
+      Module['flushPendingDeletes'] = flushPendingDeletes;
+      Module['setDelayFunction'] = setDelayFunction;
+    }
+  var registeredInstances = {};
+  
+  function getBasestPointer(class_, ptr) {
+      if (ptr === undefined) {
+          throwBindingError('ptr should not be undefined');
+      }
+      while (class_.baseClass) {
+          ptr = class_.upcast(ptr);
+          class_ = class_.baseClass;
+      }
+      return ptr;
+    }
+  function getInheritedInstance(class_, ptr) {
+      ptr = getBasestPointer(class_, ptr);
+      return registeredInstances[ptr];
+    }
+  
+  function makeClassHandle(prototype, record) {
+      if (!record.ptrType || !record.ptr) {
+          throwInternalError('makeClassHandle requires ptr and ptrType');
+      }
+      var hasSmartPtrType = !!record.smartPtrType;
+      var hasSmartPtr = !!record.smartPtr;
+      if (hasSmartPtrType !== hasSmartPtr) {
+          throwInternalError('Both smartPtrType and smartPtr must be specified');
+      }
+      record.count = { value: 1 };
+      return attachFinalizer(Object.create(prototype, {
+          $$: {
+              value: record,
+          },
+      }));
+    }
+  function RegisteredPointer_fromWireType(ptr) {
+      // ptr is a raw pointer (or a raw smartpointer)
+  
+      // rawPointer is a maybe-null raw pointer
+      var rawPointer = this.getPointee(ptr);
+      if (!rawPointer) {
+          this.destructor(ptr);
+          return null;
+      }
+  
+      var registeredInstance = getInheritedInstance(this.registeredClass, rawPointer);
+      if (undefined !== registeredInstance) {
+          // JS object has been neutered, time to repopulate it
+          if (0 === registeredInstance.$$.count.value) {
+              registeredInstance.$$.ptr = rawPointer;
+              registeredInstance.$$.smartPtr = ptr;
+              return registeredInstance['clone']();
+          } else {
+              // else, just increment reference count on existing object
+              // it already has a reference to the smart pointer
+              var rv = registeredInstance['clone']();
+              this.destructor(ptr);
+              return rv;
+          }
+      }
+  
+      function makeDefaultHandle() {
+          if (this.isSmartPointer) {
+              return makeClassHandle(this.registeredClass.instancePrototype, {
+                  ptrType: this.pointeeType,
+                  ptr: rawPointer,
+                  smartPtrType: this,
+                  smartPtr: ptr,
+              });
+          } else {
+              return makeClassHandle(this.registeredClass.instancePrototype, {
+                  ptrType: this,
+                  ptr: ptr,
+              });
+          }
+      }
+  
+      var actualType = this.registeredClass.getActualType(rawPointer);
+      var registeredPointerRecord = registeredPointers[actualType];
+      if (!registeredPointerRecord) {
+          return makeDefaultHandle.call(this);
+      }
+  
+      var toType;
+      if (this.isConst) {
+          toType = registeredPointerRecord.constPointerType;
+      } else {
+          toType = registeredPointerRecord.pointerType;
+      }
+      var dp = downcastPointer(
+          rawPointer,
+          this.registeredClass,
+          toType.registeredClass);
+      if (dp === null) {
+          return makeDefaultHandle.call(this);
+      }
+      if (this.isSmartPointer) {
+          return makeClassHandle(toType.registeredClass.instancePrototype, {
+              ptrType: toType,
+              ptr: dp,
+              smartPtrType: this,
+              smartPtr: ptr,
+          });
+      } else {
+          return makeClassHandle(toType.registeredClass.instancePrototype, {
+              ptrType: toType,
+              ptr: dp,
+          });
+      }
+    }
+  function init_RegisteredPointer() {
+      RegisteredPointer.prototype.getPointee = RegisteredPointer_getPointee;
+      RegisteredPointer.prototype.destructor = RegisteredPointer_destructor;
+      RegisteredPointer.prototype['argPackAdvance'] = 8;
+      RegisteredPointer.prototype['readValueFromPointer'] = simpleReadValueFromPointer;
+      RegisteredPointer.prototype['deleteObject'] = RegisteredPointer_deleteObject;
+      RegisteredPointer.prototype['fromWireType'] = RegisteredPointer_fromWireType;
+    }
+  /** @constructor
+      @param {*=} pointeeType,
+      @param {*=} sharingPolicy,
+      @param {*=} rawGetPointee,
+      @param {*=} rawConstructor,
+      @param {*=} rawShare,
+      @param {*=} rawDestructor,
+       */
+  function RegisteredPointer(
+      name,
+      registeredClass,
+      isReference,
+      isConst,
+  
+      // smart pointer properties
+      isSmartPointer,
+      pointeeType,
+      sharingPolicy,
+      rawGetPointee,
+      rawConstructor,
+      rawShare,
+      rawDestructor
+    ) {
+      this.name = name;
+      this.registeredClass = registeredClass;
+      this.isReference = isReference;
+      this.isConst = isConst;
+  
+      // smart pointer properties
+      this.isSmartPointer = isSmartPointer;
+      this.pointeeType = pointeeType;
+      this.sharingPolicy = sharingPolicy;
+      this.rawGetPointee = rawGetPointee;
+      this.rawConstructor = rawConstructor;
+      this.rawShare = rawShare;
+      this.rawDestructor = rawDestructor;
+  
+      if (!isSmartPointer && registeredClass.baseClass === undefined) {
+          if (isConst) {
+              this['toWireType'] = constNoSmartPtrRawPointerToWireType;
+              this.destructorFunction = null;
+          } else {
+              this['toWireType'] = nonConstNoSmartPtrRawPointerToWireType;
+              this.destructorFunction = null;
+          }
+      } else {
+          this['toWireType'] = genericPointerToWireType;
+          // Here we must leave this.destructorFunction undefined, since whether genericPointerToWireType returns
+          // a pointer that needs to be freed up is runtime-dependent, and cannot be evaluated at registration time.
+          // TODO: Create an alternative mechanism that allows removing the use of var destructors = []; array in
+          //       craftInvokerFunction altogether.
+      }
+    }
+  
+  /** @param {number=} numArguments */
+  function replacePublicSymbol(name, value, numArguments) {
+      if (!Module.hasOwnProperty(name)) {
+          throwInternalError('Replacing nonexistant public symbol');
+      }
+      // If there's an overload table for this symbol, replace the symbol in the overload table instead.
+      if (undefined !== Module[name].overloadTable && undefined !== numArguments) {
+          Module[name].overloadTable[numArguments] = value;
+      }
+      else {
+          Module[name] = value;
+          Module[name].argCount = numArguments;
+      }
+    }
+  
+  function dynCallLegacy(sig, ptr, args) {
+      var f = Module["dynCall_" + sig];
+      return args && args.length ? f.apply(null, [ptr].concat(args)) : f.call(null, ptr);
+    }
+  function dynCall(sig, ptr, args) {
+      return dynCallLegacy(sig, ptr, args);
+    }
+  function getDynCaller(sig, ptr) {
+      var argCache = [];
+      return function() {
+        argCache.length = arguments.length;
+        for (var i = 0; i < arguments.length; i++) {
+          argCache[i] = arguments[i];
+        }
+        return dynCall(sig, ptr, argCache);
+      };
+    }
+  function embind__requireFunction(signature, rawFunction) {
+      signature = readLatin1String(signature);
+  
+      function makeDynCaller() {
+        return getDynCaller(signature, rawFunction);
+      }
+  
+      var fp = makeDynCaller();
+      if (typeof fp !== "function") {
+          throwBindingError("unknown function pointer with signature " + signature + ": " + rawFunction);
+      }
+      return fp;
+    }
+  
+  var UnboundTypeError = undefined;
+  
+  function getTypeName(type) {
+      var ptr = ___getTypeName(type);
+      var rv = readLatin1String(ptr);
+      _free(ptr);
+      return rv;
+    }
+  function throwUnboundTypeError(message, types) {
+      var unboundTypes = [];
+      var seen = {};
+      function visit(type) {
+          if (seen[type]) {
+              return;
+          }
+          if (registeredTypes[type]) {
+              return;
+          }
+          if (typeDependencies[type]) {
+              typeDependencies[type].forEach(visit);
+              return;
+          }
+          unboundTypes.push(type);
+          seen[type] = true;
+      }
+      types.forEach(visit);
+  
+      throw new UnboundTypeError(message + ': ' + unboundTypes.map(getTypeName).join([', ']));
+    }
+  function __embind_register_class(
+      rawType,
+      rawPointerType,
+      rawConstPointerType,
+      baseClassRawType,
+      getActualTypeSignature,
+      getActualType,
+      upcastSignature,
+      upcast,
+      downcastSignature,
+      downcast,
+      name,
+      destructorSignature,
+      rawDestructor
+    ) {
+      name = readLatin1String(name);
+      getActualType = embind__requireFunction(getActualTypeSignature, getActualType);
+      if (upcast) {
+          upcast = embind__requireFunction(upcastSignature, upcast);
+      }
+      if (downcast) {
+          downcast = embind__requireFunction(downcastSignature, downcast);
+      }
+      rawDestructor = embind__requireFunction(destructorSignature, rawDestructor);
+      var legalFunctionName = makeLegalFunctionName(name);
+  
+      exposePublicSymbol(legalFunctionName, function() {
+          // this code cannot run if baseClassRawType is zero
+          throwUnboundTypeError('Cannot construct ' + name + ' due to unbound types', [baseClassRawType]);
+      });
+  
+      whenDependentTypesAreResolved(
+          [rawType, rawPointerType, rawConstPointerType],
+          baseClassRawType ? [baseClassRawType] : [],
+          function(base) {
+              base = base[0];
+  
+              var baseClass;
+              var basePrototype;
+              if (baseClassRawType) {
+                  baseClass = base.registeredClass;
+                  basePrototype = baseClass.instancePrototype;
+              } else {
+                  basePrototype = ClassHandle.prototype;
+              }
+  
+              var constructor = createNamedFunction(legalFunctionName, function() {
+                  if (Object.getPrototypeOf(this) !== instancePrototype) {
+                      throw new BindingError("Use 'new' to construct " + name);
+                  }
+                  if (undefined === registeredClass.constructor_body) {
+                      throw new BindingError(name + " has no accessible constructor");
+                  }
+                  var body = registeredClass.constructor_body[arguments.length];
+                  if (undefined === body) {
+                      throw new BindingError("Tried to invoke ctor of " + name + " with invalid number of parameters (" + arguments.length + ") - expected (" + Object.keys(registeredClass.constructor_body).toString() + ") parameters instead!");
+                  }
+                  return body.apply(this, arguments);
+              });
+  
+              var instancePrototype = Object.create(basePrototype, {
+                  constructor: { value: constructor },
+              });
+  
+              constructor.prototype = instancePrototype;
+  
+              var registeredClass = new RegisteredClass(
+                  name,
+                  constructor,
+                  instancePrototype,
+                  rawDestructor,
+                  baseClass,
+                  getActualType,
+                  upcast,
+                  downcast);
+  
+              var referenceConverter = new RegisteredPointer(
+                  name,
+                  registeredClass,
+                  true,
+                  false,
+                  false);
+  
+              var pointerConverter = new RegisteredPointer(
+                  name + '*',
+                  registeredClass,
+                  false,
+                  false,
+                  false);
+  
+              var constPointerConverter = new RegisteredPointer(
+                  name + ' const*',
+                  registeredClass,
+                  false,
+                  true,
+                  false);
+  
+              registeredPointers[rawType] = {
+                  pointerType: pointerConverter,
+                  constPointerType: constPointerConverter
+              };
+  
+              replacePublicSymbol(legalFunctionName, constructor);
+  
+              return [referenceConverter, pointerConverter, constPointerConverter];
+          }
+      );
+    }
+
+  function heap32VectorToArray(count, firstElement) {
+      
+      var array = [];
+      for (var i = 0; i < count; i++) {
+          array.push(HEAP32[(firstElement >> 2) + i]);
+      }
+      return array;
+    }
+  function __embind_register_class_constructor(
+      rawClassType,
+      argCount,
+      rawArgTypesAddr,
+      invokerSignature,
+      invoker,
+      rawConstructor
+    ) {
+      assert(argCount > 0);
+      var rawArgTypes = heap32VectorToArray(argCount, rawArgTypesAddr);
+      invoker = embind__requireFunction(invokerSignature, invoker);
+      var args = [rawConstructor];
+      var destructors = [];
+  
+      whenDependentTypesAreResolved([], [rawClassType], function(classType) {
+          classType = classType[0];
+          var humanName = 'constructor ' + classType.name;
+  
+          if (undefined === classType.registeredClass.constructor_body) {
+              classType.registeredClass.constructor_body = [];
+          }
+          if (undefined !== classType.registeredClass.constructor_body[argCount - 1]) {
+              throw new BindingError("Cannot register multiple constructors with identical number of parameters (" + (argCount-1) + ") for class '" + classType.name + "'! Overload resolution is currently only performed using the parameter count, not actual type info!");
+          }
+          classType.registeredClass.constructor_body[argCount - 1] = function unboundTypeHandler() {
+              throwUnboundTypeError('Cannot construct ' + classType.name + ' due to unbound types', rawArgTypes);
+          };
+  
+          whenDependentTypesAreResolved([], rawArgTypes, function(argTypes) {
+              // Insert empty slot for context type (argTypes[1]).
+              argTypes.splice(1, 0, null);
+              classType.registeredClass.constructor_body[argCount - 1] = craftInvokerFunction(humanName, argTypes, null, invoker, rawConstructor);
+              return [];
+          });
+          return [];
+      });
+    }
+
+  function new_(constructor, argumentList) {
+      if (!(constructor instanceof Function)) {
+          throw new TypeError('new_ called with constructor type ' + typeof(constructor) + " which is not a function");
+      }
+  
+      /*
+       * Previously, the following line was just:
+  
+       function dummy() {};
+  
+       * Unfortunately, Chrome was preserving 'dummy' as the object's name, even though at creation, the 'dummy' has the
+       * correct constructor name.  Thus, objects created with IMVU.new would show up in the debugger as 'dummy', which
+       * isn't very helpful.  Using IMVU.createNamedFunction addresses the issue.  Doublely-unfortunately, there's no way
+       * to write a test for this behavior.  -NRD 2013.02.22
+       */
+      var dummy = createNamedFunction(constructor.name || 'unknownFunctionName', function(){});
+      dummy.prototype = constructor.prototype;
+      var obj = new dummy;
+  
+      var r = constructor.apply(obj, argumentList);
+      return (r instanceof Object) ? r : obj;
+    }
+  
+  function runAndAbortIfError(func) {
+      try {
+        return func();
+      } catch (e) {
+        abort(e);
+      }
+    }
+  
+  function callUserCallback(func, synchronous) {
+      if (runtimeExited || ABORT) {
+        return;
+      }
+      // For synchronous calls, let any exceptions propagate, and don't let the runtime exit.
+      if (synchronous) {
+        func();
+        return;
+      }
+      try {
+        func();
+      } catch (e) {
+        handleException(e);
+      }
+    }
+  
+  function runtimeKeepalivePush() {
+      runtimeKeepaliveCounter += 1;
+    }
+  
+  function runtimeKeepalivePop() {
+      runtimeKeepaliveCounter -= 1;
+    }
+  var Asyncify = {State:{Normal:0,Unwinding:1,Rewinding:2,Disabled:3},state:0,StackSize:65536,currData:null,handleSleepReturnValue:0,exportCallStack:[],callStackNameToId:{},callStackIdToName:{},callStackId:0,asyncPromiseHandlers:null,sleepCallbacks:[],getCallStackId:function(funcName) {
+        var id = Asyncify.callStackNameToId[funcName];
+        if (id === undefined) {
+          id = Asyncify.callStackId++;
+          Asyncify.callStackNameToId[funcName] = id;
+          Asyncify.callStackIdToName[id] = funcName;
+        }
+        return id;
+      },instrumentWasmExports:function(exports) {
+        var ret = {};
+        for (var x in exports) {
+          (function(x) {
+            var original = exports[x];
+            if (typeof original === 'function') {
+              ret[x] = function() {
+                Asyncify.exportCallStack.push(x);
+                try {
+                  return original.apply(null, arguments);
+                } finally {
+                  if (!ABORT) {
+                    var y = Asyncify.exportCallStack.pop();
+                    assert(y === x);
+                    Asyncify.maybeStopUnwind();
+                  }
+                }
+              };
+            } else {
+              ret[x] = original;
+            }
+          })(x);
+        }
+        return ret;
+      },maybeStopUnwind:function() {
+        if (Asyncify.currData &&
+            Asyncify.state === Asyncify.State.Unwinding &&
+            Asyncify.exportCallStack.length === 0) {
+          // We just finished unwinding.
+          
+          Asyncify.state = Asyncify.State.Normal;
+          // Keep the runtime alive so that a re-wind can be done later.
+          runAndAbortIfError(Module['_asyncify_stop_unwind']);
+          if (typeof Fibers !== 'undefined') {
+            Fibers.trampoline();
+          }
+        }
+      },whenDone:function() {
+        return new Promise(function(resolve, reject) {
+          Asyncify.asyncPromiseHandlers = {
+            resolve: resolve,
+            reject: reject
+          };
+        });
+      },allocateData:function() {
+        // An asyncify data structure has three fields:
+        //  0  current stack pos
+        //  4  max stack pos
+        //  8  id of function at bottom of the call stack (callStackIdToName[id] == name of js function)
+        //
+        // The Asyncify ABI only interprets the first two fields, the rest is for the runtime.
+        // We also embed a stack in the same memory region here, right next to the structure.
+        // This struct is also defined as asyncify_data_t in emscripten/fiber.h
+        var ptr = _malloc(12 + Asyncify.StackSize);
+        Asyncify.setDataHeader(ptr, ptr + 12, Asyncify.StackSize);
+        Asyncify.setDataRewindFunc(ptr);
+        return ptr;
+      },setDataHeader:function(ptr, stack, stackSize) {
+        HEAP32[((ptr)>>2)] = stack;
+        HEAP32[(((ptr)+(4))>>2)] = stack + stackSize;
+      },setDataRewindFunc:function(ptr) {
+        var bottomOfCallStack = Asyncify.exportCallStack[0];
+        var rewindId = Asyncify.getCallStackId(bottomOfCallStack);
+        HEAP32[(((ptr)+(8))>>2)] = rewindId;
+      },getDataRewindFunc:function(ptr) {
+        var id = HEAP32[(((ptr)+(8))>>2)];
+        var name = Asyncify.callStackIdToName[id];
+        var func = Module['asm'][name];
+        return func;
+      },doRewind:function(ptr) {
+        var start = Asyncify.getDataRewindFunc(ptr);
+        // Once we have rewound and the stack we no longer need to artificially keep
+        // the runtime alive.
+        
+        return start();
+      },handleSleep:function(startAsync) {
+        if (ABORT) return;
+        if (Asyncify.state === Asyncify.State.Normal) {
+          // Prepare to sleep. Call startAsync, and see what happens:
+          // if the code decided to call our callback synchronously,
+          // then no async operation was in fact begun, and we don't
+          // need to do anything.
+          var reachedCallback = false;
+          var reachedAfterCallback = false;
+          startAsync(function(handleSleepReturnValue) {
+            if (ABORT) return;
+            Asyncify.handleSleepReturnValue = handleSleepReturnValue || 0;
+            reachedCallback = true;
+            if (!reachedAfterCallback) {
+              // We are happening synchronously, so no need for async.
+              return;
+            }
+            Asyncify.state = Asyncify.State.Rewinding;
+            runAndAbortIfError(function() { Module['_asyncify_start_rewind'](Asyncify.currData) });
+            if (typeof Browser !== 'undefined' && Browser.mainLoop.func) {
+              Browser.mainLoop.resume();
+            }
+            var asyncWasmReturnValue, isError = false;
+            try {
+              asyncWasmReturnValue = Asyncify.doRewind(Asyncify.currData);
+            } catch (err) {
+              asyncWasmReturnValue = err;
+              isError = true;
+            }
+            // Track whether the return value was handled by any promise handlers.
+            var handled = false;
+            if (!Asyncify.currData) {
+              // All asynchronous execution has finished.
+              // `asyncWasmReturnValue` now contains the final
+              // return value of the exported async WASM function.
+              //
+              // Note: `asyncWasmReturnValue` is distinct from
+              // `Asyncify.handleSleepReturnValue`.
+              // `Asyncify.handleSleepReturnValue` contains the return
+              // value of the last C function to have executed
+              // `Asyncify.handleSleep()`, where as `asyncWasmReturnValue`
+              // contains the return value of the exported WASM function
+              // that may have called C functions that
+              // call `Asyncify.handleSleep()`.
+              var asyncPromiseHandlers = Asyncify.asyncPromiseHandlers;
+              if (asyncPromiseHandlers) {
+                Asyncify.asyncPromiseHandlers = null;
+                (isError ? asyncPromiseHandlers.reject : asyncPromiseHandlers.resolve)(asyncWasmReturnValue);
+                handled = true;
+              }
+            }
+            if (isError && !handled) {
+              // If there was an error and it was not handled by now, we have no choice but to
+              // rethrow that error into the global scope where it can be caught only by
+              // `onerror` or `onunhandledpromiserejection`.
+              throw asyncWasmReturnValue;
+            }
+          });
+          reachedAfterCallback = true;
+          if (!reachedCallback) {
+            // A true async operation was begun; start a sleep.
+            Asyncify.state = Asyncify.State.Unwinding;
+            // TODO: reuse, don't alloc/free every sleep
+            Asyncify.currData = Asyncify.allocateData();
+            runAndAbortIfError(function() { Module['_asyncify_start_unwind'](Asyncify.currData) });
+            if (typeof Browser !== 'undefined' && Browser.mainLoop.func) {
+              Browser.mainLoop.pause();
+            }
+          }
+        } else if (Asyncify.state === Asyncify.State.Rewinding) {
+          // Stop a resume.
+          Asyncify.state = Asyncify.State.Normal;
+          runAndAbortIfError(Module['_asyncify_stop_rewind']);
+          _free(Asyncify.currData);
+          Asyncify.currData = null;
+          // Call all sleep callbacks now that the sleep-resume is all done.
+          Asyncify.sleepCallbacks.forEach(function(func) {
+            callUserCallback(func);
+          });
+        } else {
+          abort('invalid state: ' + Asyncify.state);
+        }
+        return Asyncify.handleSleepReturnValue;
+      },handleAsync:function(startAsync) {
+        return Asyncify.handleSleep(function(wakeUp) {
+          // TODO: add error handling as a second param when handleSleep implements it.
+          startAsync().then(wakeUp);
+        });
+      }};
+  function craftInvokerFunction(humanName, argTypes, classType, cppInvokerFunc, cppTargetFunc) {
+      // humanName: a human-readable string name for the function to be generated.
+      // argTypes: An array that contains the embind type objects for all types in the function signature.
+      //    argTypes[0] is the type object for the function return value.
+      //    argTypes[1] is the type object for function this object/class type, or null if not crafting an invoker for a class method.
+      //    argTypes[2...] are the actual function parameters.
+      // classType: The embind type object for the class to be bound, or null if this is not a method of a class.
+      // cppInvokerFunc: JS Function object to the C++-side function that interops into C++ code.
+      // cppTargetFunc: Function pointer (an integer to FUNCTION_TABLE) to the target C++ function the cppInvokerFunc will end up calling.
+      var argCount = argTypes.length;
+  
+      if (argCount < 2) {
+          throwBindingError("argTypes array size mismatch! Must at least get return value and 'this' types!");
+      }
+  
+      var isClassMethodFunc = (argTypes[1] !== null && classType !== null);
+  
+      // Free functions with signature "void function()" do not need an invoker that marshalls between wire types.
+  // TODO: This omits argument count check - enable only at -O3 or similar.
+  //    if (ENABLE_UNSAFE_OPTS && argCount == 2 && argTypes[0].name == "void" && !isClassMethodFunc) {
+  //       return FUNCTION_TABLE[fn];
+  //    }
+  
+      // Determine if we need to use a dynamic stack to store the destructors for the function parameters.
+      // TODO: Remove this completely once all function invokers are being dynamically generated.
+      var needsDestructorStack = false;
+  
+      for (var i = 1; i < argTypes.length; ++i) { // Skip return value at index 0 - it's not deleted here.
+          if (argTypes[i] !== null && argTypes[i].destructorFunction === undefined) { // The type does not define a destructor function - must use dynamic stack
+              needsDestructorStack = true;
+              break;
+          }
+      }
+  
+      var returns = (argTypes[0].name !== "void");
+  
+      var argsList = "";
+      var argsListWired = "";
+      for (var i = 0; i < argCount - 2; ++i) {
+          argsList += (i!==0?", ":"")+"arg"+i;
+          argsListWired += (i!==0?", ":"")+"arg"+i+"Wired";
+      }
+  
+      var invokerFnBody =
+          "return function "+makeLegalFunctionName(humanName)+"("+argsList+") {\n" +
+          "if (arguments.length !== "+(argCount - 2)+") {\n" +
+              "throwBindingError('function "+humanName+" called with ' + arguments.length + ' arguments, expected "+(argCount - 2)+" args!');\n" +
+          "}\n";
+  
+      if (needsDestructorStack) {
+          invokerFnBody +=
+              "var destructors = [];\n";
+      }
+  
+      var dtorStack = needsDestructorStack ? "destructors" : "null";
+      var args1 = ["throwBindingError", "invoker", "fn", "runDestructors", "retType", "classParam"];
+      var args2 = [throwBindingError, cppInvokerFunc, cppTargetFunc, runDestructors, argTypes[0], argTypes[1]];
+  
+      if (isClassMethodFunc) {
+          invokerFnBody += "var thisWired = classParam.toWireType("+dtorStack+", this);\n";
+      }
+  
+      for (var i = 0; i < argCount - 2; ++i) {
+          invokerFnBody += "var arg"+i+"Wired = argType"+i+".toWireType("+dtorStack+", arg"+i+"); // "+argTypes[i+2].name+"\n";
+          args1.push("argType"+i);
+          args2.push(argTypes[i+2]);
+      }
+  
+      if (isClassMethodFunc) {
+          argsListWired = "thisWired" + (argsListWired.length > 0 ? ", " : "") + argsListWired;
+      }
+  
+      invokerFnBody +=
+          (returns?"var rv = ":"") + "invoker(fn"+(argsListWired.length>0?", ":"")+argsListWired+");\n";
+  
+      args1.push("Asyncify");
+      args2.push(Asyncify);
+      invokerFnBody += "function onDone(" + (returns ? "rv" : "") + ") {\n";
+  
+      if (needsDestructorStack) {
+          invokerFnBody += "runDestructors(destructors);\n";
+      } else {
+          for (var i = isClassMethodFunc?1:2; i < argTypes.length; ++i) { // Skip return value at index 0 - it's not deleted here. Also skip class type if not a method.
+              var paramName = (i === 1 ? "thisWired" : ("arg"+(i - 2)+"Wired"));
+              if (argTypes[i].destructorFunction !== null) {
+                  invokerFnBody += paramName+"_dtor("+paramName+"); // "+argTypes[i].name+"\n";
+                  args1.push(paramName+"_dtor");
+                  args2.push(argTypes[i].destructorFunction);
+              }
+          }
+      }
+  
+      if (returns) {
+          invokerFnBody += "var ret = retType.fromWireType(rv);\n" +
+                           "return ret;\n";
+      } else {
+      }
+  
+      invokerFnBody += "}\n";
+      invokerFnBody += "return Asyncify.currData ? Asyncify.whenDone().then(onDone) : onDone(" + (returns ? "rv" : "") +");\n"
+  
+      invokerFnBody += "}\n";
+  
+      args1.push(invokerFnBody);
+  
+      var invokerFunction = new_(Function, args1).apply(null, args2);
+      return invokerFunction;
+    }
+  function __embind_register_class_function(
+      rawClassType,
+      methodName,
+      argCount,
+      rawArgTypesAddr, // [ReturnType, ThisType, Args...]
+      invokerSignature,
+      rawInvoker,
+      context,
+      isPureVirtual
+    ) {
+      var rawArgTypes = heap32VectorToArray(argCount, rawArgTypesAddr);
+      methodName = readLatin1String(methodName);
+      rawInvoker = embind__requireFunction(invokerSignature, rawInvoker);
+  
+      whenDependentTypesAreResolved([], [rawClassType], function(classType) {
+          classType = classType[0];
+          var humanName = classType.name + '.' + methodName;
+  
+          if (methodName.startsWith("@@")) {
+              methodName = Symbol[methodName.substring(2)];
+          }
+  
+          if (isPureVirtual) {
+              classType.registeredClass.pureVirtualFunctions.push(methodName);
+          }
+  
+          function unboundTypesHandler() {
+              throwUnboundTypeError('Cannot call ' + humanName + ' due to unbound types', rawArgTypes);
+          }
+  
+          var proto = classType.registeredClass.instancePrototype;
+          var method = proto[methodName];
+          if (undefined === method || (undefined === method.overloadTable && method.className !== classType.name && method.argCount === argCount - 2)) {
+              // This is the first overload to be registered, OR we are replacing a function in the base class with a function in the derived class.
+              unboundTypesHandler.argCount = argCount - 2;
+              unboundTypesHandler.className = classType.name;
+              proto[methodName] = unboundTypesHandler;
+          } else {
+              // There was an existing function with the same name registered. Set up a function overload routing table.
+              ensureOverloadTable(proto, methodName, humanName);
+              proto[methodName].overloadTable[argCount - 2] = unboundTypesHandler;
+          }
+  
+          whenDependentTypesAreResolved([], rawArgTypes, function(argTypes) {
+  
+              var memberFunction = craftInvokerFunction(humanName, argTypes, classType, rawInvoker, context);
+  
+              // Replace the initial unbound-handler-stub function with the appropriate member function, now that all types
+              // are resolved. If multiple overloads are registered for this function, the function goes into an overload table.
+              if (undefined === proto[methodName].overloadTable) {
+                  // Set argCount in case an overload is registered later
+                  memberFunction.argCount = argCount - 2;
+                  proto[methodName] = memberFunction;
+              } else {
+                  proto[methodName].overloadTable[argCount - 2] = memberFunction;
+              }
+  
+              return [];
+          });
+          return [];
+      });
+    }
+
+  var emval_free_list = [];
+  
+  var emval_handle_array = [{},{value:undefined},{value:null},{value:true},{value:false}];
+  function __emval_decref(handle) {
+      if (handle > 4 && 0 === --emval_handle_array[handle].refcount) {
+          emval_handle_array[handle] = undefined;
+          emval_free_list.push(handle);
+      }
+    }
+  
+  function count_emval_handles() {
+      var count = 0;
+      for (var i = 5; i < emval_handle_array.length; ++i) {
+          if (emval_handle_array[i] !== undefined) {
+              ++count;
+          }
+      }
+      return count;
+    }
+  
+  function get_first_emval() {
+      for (var i = 5; i < emval_handle_array.length; ++i) {
+          if (emval_handle_array[i] !== undefined) {
+              return emval_handle_array[i];
+          }
+      }
+      return null;
+    }
+  function init_emval() {
+      Module['count_emval_handles'] = count_emval_handles;
+      Module['get_first_emval'] = get_first_emval;
+    }
+  var Emval = {toValue:function(handle) {
+        if (!handle) {
+            throwBindingError('Cannot use deleted val. handle = ' + handle);
+        }
+        return emval_handle_array[handle].value;
+      },toHandle:function(value) {
+        switch (value) {
+          case undefined :{ return 1; }
+          case null :{ return 2; }
+          case true :{ return 3; }
+          case false :{ return 4; }
+          default:{
+            var handle = emval_free_list.length ?
+                emval_free_list.pop() :
+                emval_handle_array.length;
+    
+            emval_handle_array[handle] = {refcount: 1, value: value};
+            return handle;
+            }
+          }
+      }};
+  function __embind_register_emval(rawType, name) {
+      name = readLatin1String(name);
+      registerType(rawType, {
+          name: name,
+          'fromWireType': function(handle) {
+              var rv = Emval.toValue(handle);
+              __emval_decref(handle);
+              return rv;
+          },
+          'toWireType': function(destructors, value) {
+              return Emval.toHandle(value);
+          },
+          'argPackAdvance': 8,
+          'readValueFromPointer': simpleReadValueFromPointer,
+          destructorFunction: null, // This type does not need a destructor
+  
+          // TODO: do we need a deleteObject here?  write a test where
+          // emval is passed into JS via an interface
+      });
+    }
+
+  function _embind_repr(v) {
+      if (v === null) {
+          return 'null';
+      }
+      var t = typeof v;
+      if (t === 'object' || t === 'array' || t === 'function') {
+          return v.toString();
+      } else {
+          return '' + v;
+      }
+    }
+  
+  function floatReadValueFromPointer(name, shift) {
+      switch (shift) {
+          case 2: return function(pointer) {
+              return this['fromWireType'](HEAPF32[pointer >> 2]);
+          };
+          case 3: return function(pointer) {
+              return this['fromWireType'](HEAPF64[pointer >> 3]);
+          };
+          default:
+              throw new TypeError("Unknown float type: " + name);
+      }
+    }
+  function __embind_register_float(rawType, name, size) {
+      var shift = getShiftFromSize(size);
+      name = readLatin1String(name);
+      registerType(rawType, {
+          name: name,
+          'fromWireType': function(value) {
+              return value;
+          },
+          'toWireType': function(destructors, value) {
+              // The VM will perform JS to Wasm value conversion, according to the spec:
+              // https://www.w3.org/TR/wasm-js-api-1/#towebassemblyvalue
+              return value;
+          },
+          'argPackAdvance': 8,
+          'readValueFromPointer': floatReadValueFromPointer(name, shift),
+          destructorFunction: null, // This type does not need a destructor
+      });
+    }
+
+  function __embind_register_function(name, argCount, rawArgTypesAddr, signature, rawInvoker, fn) {
+      var argTypes = heap32VectorToArray(argCount, rawArgTypesAddr);
+      name = readLatin1String(name);
+  
+      rawInvoker = embind__requireFunction(signature, rawInvoker);
+  
+      exposePublicSymbol(name, function() {
+          throwUnboundTypeError('Cannot call ' + name + ' due to unbound types', argTypes);
+      }, argCount - 1);
+  
+      whenDependentTypesAreResolved([], argTypes, function(argTypes) {
+          var invokerArgsArray = [argTypes[0] /* return value */, null /* no class 'this'*/].concat(argTypes.slice(1) /* actual params */);
+          replacePublicSymbol(name, craftInvokerFunction(name, invokerArgsArray, null /* no class 'this'*/, rawInvoker, fn), argCount - 1);
+          return [];
+      });
+    }
+
+  function integerReadValueFromPointer(name, shift, signed) {
+      // integers are quite common, so generate very specialized functions
+      switch (shift) {
+          case 0: return signed ?
+              function readS8FromPointer(pointer) { return HEAP8[pointer]; } :
+              function readU8FromPointer(pointer) { return HEAPU8[pointer]; };
+          case 1: return signed ?
+              function readS16FromPointer(pointer) { return HEAP16[pointer >> 1]; } :
+              function readU16FromPointer(pointer) { return HEAPU16[pointer >> 1]; };
+          case 2: return signed ?
+              function readS32FromPointer(pointer) { return HEAP32[pointer >> 2]; } :
+              function readU32FromPointer(pointer) { return HEAPU32[pointer >> 2]; };
+          default:
+              throw new TypeError("Unknown integer type: " + name);
+      }
+    }
+  function __embind_register_integer(primitiveType, name, size, minRange, maxRange) {
+      name = readLatin1String(name);
+      if (maxRange === -1) { // LLVM doesn't have signed and unsigned 32-bit types, so u32 literals come out as 'i32 -1'. Always treat those as max u32.
+          maxRange = 4294967295;
+      }
+  
+      var shift = getShiftFromSize(size);
+  
+      var fromWireType = function(value) {
+          return value;
+      };
+  
+      if (minRange === 0) {
+          var bitshift = 32 - 8*size;
+          fromWireType = function(value) {
+              return (value << bitshift) >>> bitshift;
+          };
+      }
+  
+      var isUnsignedType = (name.includes('unsigned'));
+  
+      registerType(primitiveType, {
+          name: name,
+          'fromWireType': fromWireType,
+          'toWireType': function(destructors, value) {
+              // todo: Here we have an opportunity for -O3 level "unsafe" optimizations: we could
+              // avoid the following two if()s and assume value is of proper type.
+              if (typeof value !== "number" && typeof value !== "boolean") {
+                  throw new TypeError('Cannot convert "' + _embind_repr(value) + '" to ' + this.name);
+              }
+              if (value < minRange || value > maxRange) {
+                  throw new TypeError('Passing a number "' + _embind_repr(value) + '" from JS side to C/C++ side to an argument of type "' + name + '", which is outside the valid range [' + minRange + ', ' + maxRange + ']!');
+              }
+              return isUnsignedType ? (value >>> 0) : (value | 0);
+          },
+          'argPackAdvance': 8,
+          'readValueFromPointer': integerReadValueFromPointer(name, shift, minRange !== 0),
+          destructorFunction: null, // This type does not need a destructor
+      });
+    }
+
+  function __embind_register_memory_view(rawType, dataTypeIndex, name) {
+      var typeMapping = [
+          Int8Array,
+          Uint8Array,
+          Int16Array,
+          Uint16Array,
+          Int32Array,
+          Uint32Array,
+          Float32Array,
+          Float64Array,
+      ];
+  
+      var TA = typeMapping[dataTypeIndex];
+  
+      function decodeMemoryView(handle) {
+          handle = handle >> 2;
+          var heap = HEAPU32;
+          var size = heap[handle]; // in elements
+          var data = heap[handle + 1]; // byte offset into emscripten heap
+          return new TA(buffer, data, size);
+      }
+  
+      name = readLatin1String(name);
+      registerType(rawType, {
+          name: name,
+          'fromWireType': decodeMemoryView,
+          'argPackAdvance': 8,
+          'readValueFromPointer': decodeMemoryView,
+      }, {
+          ignoreDuplicateRegistrations: true,
+      });
+    }
+
+  function __embind_register_std_string(rawType, name) {
+      name = readLatin1String(name);
+      var stdStringIsUTF8
+      //process only std::string bindings with UTF8 support, in contrast to e.g. std::basic_string<unsigned char>
+      = (name === "std::string");
+  
+      registerType(rawType, {
+          name: name,
+          'fromWireType': function(value) {
+              var length = HEAPU32[value >> 2];
+  
+              var str;
+              if (stdStringIsUTF8) {
+                  var decodeStartPtr = value + 4;
+                  // Looping here to support possible embedded '0' bytes
+                  for (var i = 0; i <= length; ++i) {
+                      var currentBytePtr = value + 4 + i;
+                      if (i == length || HEAPU8[currentBytePtr] == 0) {
+                          var maxRead = currentBytePtr - decodeStartPtr;
+                          var stringSegment = UTF8ToString(decodeStartPtr, maxRead);
+                          if (str === undefined) {
+                              str = stringSegment;
+                          } else {
+                              str += String.fromCharCode(0);
+                              str += stringSegment;
+                          }
+                          decodeStartPtr = currentBytePtr + 1;
+                      }
+                  }
+              } else {
+                  var a = new Array(length);
+                  for (var i = 0; i < length; ++i) {
+                      a[i] = String.fromCharCode(HEAPU8[value + 4 + i]);
+                  }
+                  str = a.join('');
+              }
+  
+              _free(value);
+  
+              return str;
+          },
+          'toWireType': function(destructors, value) {
+              if (value instanceof ArrayBuffer) {
+                  value = new Uint8Array(value);
+              }
+  
+              var getLength;
+              var valueIsOfTypeString = (typeof value === 'string');
+  
+              if (!(valueIsOfTypeString || value instanceof Uint8Array || value instanceof Uint8ClampedArray || value instanceof Int8Array)) {
+                  throwBindingError('Cannot pass non-string to std::string');
+              }
+              if (stdStringIsUTF8 && valueIsOfTypeString) {
+                  getLength = function() {return lengthBytesUTF8(value);};
+              } else {
+                  getLength = function() {return value.length;};
+              }
+  
+              // assumes 4-byte alignment
+              var length = getLength();
+              var ptr = _malloc(4 + length + 1);
+              HEAPU32[ptr >> 2] = length;
+              if (stdStringIsUTF8 && valueIsOfTypeString) {
+                  stringToUTF8(value, ptr + 4, length + 1);
+              } else {
+                  if (valueIsOfTypeString) {
+                      for (var i = 0; i < length; ++i) {
+                          var charCode = value.charCodeAt(i);
+                          if (charCode > 255) {
+                              _free(ptr);
+                              throwBindingError('String has UTF-16 code units that do not fit in 8 bits');
+                          }
+                          HEAPU8[ptr + 4 + i] = charCode;
+                      }
+                  } else {
+                      for (var i = 0; i < length; ++i) {
+                          HEAPU8[ptr + 4 + i] = value[i];
+                      }
+                  }
+              }
+  
+              if (destructors !== null) {
+                  destructors.push(_free, ptr);
+              }
+              return ptr;
+          },
+          'argPackAdvance': 8,
+          'readValueFromPointer': simpleReadValueFromPointer,
+          destructorFunction: function(ptr) { _free(ptr); },
+      });
+    }
+
+  function __embind_register_std_wstring(rawType, charSize, name) {
+      name = readLatin1String(name);
+      var decodeString, encodeString, getHeap, lengthBytesUTF, shift;
+      if (charSize === 2) {
+          decodeString = UTF16ToString;
+          encodeString = stringToUTF16;
+          lengthBytesUTF = lengthBytesUTF16;
+          getHeap = function() { return HEAPU16; };
+          shift = 1;
+      } else if (charSize === 4) {
+          decodeString = UTF32ToString;
+          encodeString = stringToUTF32;
+          lengthBytesUTF = lengthBytesUTF32;
+          getHeap = function() { return HEAPU32; };
+          shift = 2;
+      }
+      registerType(rawType, {
+          name: name,
+          'fromWireType': function(value) {
+              // Code mostly taken from _embind_register_std_string fromWireType
+              var length = HEAPU32[value >> 2];
+              var HEAP = getHeap();
+              var str;
+  
+              var decodeStartPtr = value + 4;
+              // Looping here to support possible embedded '0' bytes
+              for (var i = 0; i <= length; ++i) {
+                  var currentBytePtr = value + 4 + i * charSize;
+                  if (i == length || HEAP[currentBytePtr >> shift] == 0) {
+                      var maxReadBytes = currentBytePtr - decodeStartPtr;
+                      var stringSegment = decodeString(decodeStartPtr, maxReadBytes);
+                      if (str === undefined) {
+                          str = stringSegment;
+                      } else {
+                          str += String.fromCharCode(0);
+                          str += stringSegment;
+                      }
+                      decodeStartPtr = currentBytePtr + charSize;
+                  }
+              }
+  
+              _free(value);
+  
+              return str;
+          },
+          'toWireType': function(destructors, value) {
+              if (!(typeof value === 'string')) {
+                  throwBindingError('Cannot pass non-string to C++ string type ' + name);
+              }
+  
+              // assumes 4-byte alignment
+              var length = lengthBytesUTF(value);
+              var ptr = _malloc(4 + length + charSize);
+              HEAPU32[ptr >> 2] = length >> shift;
+  
+              encodeString(value, ptr + 4, length + charSize);
+  
+              if (destructors !== null) {
+                  destructors.push(_free, ptr);
+              }
+              return ptr;
+          },
+          'argPackAdvance': 8,
+          'readValueFromPointer': simpleReadValueFromPointer,
+          destructorFunction: function(ptr) { _free(ptr); },
+      });
+    }
+
+  function __embind_register_value_object(
+      rawType,
+      name,
+      constructorSignature,
+      rawConstructor,
+      destructorSignature,
+      rawDestructor
+    ) {
+      structRegistrations[rawType] = {
+          name: readLatin1String(name),
+          rawConstructor: embind__requireFunction(constructorSignature, rawConstructor),
+          rawDestructor: embind__requireFunction(destructorSignature, rawDestructor),
+          fields: [],
+      };
+    }
+
+  function __embind_register_value_object_field(
+      structType,
+      fieldName,
+      getterReturnType,
+      getterSignature,
+      getter,
+      getterContext,
+      setterArgumentType,
+      setterSignature,
+      setter,
+      setterContext
+    ) {
+      structRegistrations[structType].fields.push({
+          fieldName: readLatin1String(fieldName),
+          getterReturnType: getterReturnType,
+          getter: embind__requireFunction(getterSignature, getter),
+          getterContext: getterContext,
+          setterArgumentType: setterArgumentType,
+          setter: embind__requireFunction(setterSignature, setter),
+          setterContext: setterContext,
+      });
+    }
+
+  function __embind_register_void(rawType, name) {
+      name = readLatin1String(name);
+      registerType(rawType, {
+          isVoid: true, // void return values can be optimized out sometimes
+          name: name,
+          'argPackAdvance': 0,
+          'fromWireType': function() {
+              return undefined;
+          },
+          'toWireType': function(destructors, o) {
+              // TODO: assert if anything else is given?
+              return undefined;
+          },
+      });
+    }
+
+  function _abort() {
+      abort('');
+    }
+
+  function _clock() {
+      if (_clock.start === undefined) _clock.start = Date.now();
+      return ((Date.now() - _clock.start) * (1000000 / 1000))|0;
+    }
+
+  var _emscripten_get_now;if (typeof performance !== 'undefined' && performance.now) {
+    _emscripten_get_now = function() { return performance.now(); }
+  } else {
+    _emscripten_get_now = Date.now;
+  }
+  
+  var _emscripten_get_now_is_monotonic = 
+       ((typeof performance === 'object' && performance && typeof performance['now'] === 'function')
+      );;
+  function _clock_gettime(clk_id, tp) {
+      // int clock_gettime(clockid_t clk_id, struct timespec *tp);
+      var now;
+      if (clk_id === 0) {
+        now = Date.now();
+      } else if ((clk_id === 1 || clk_id === 4) && _emscripten_get_now_is_monotonic) {
+        now = _emscripten_get_now();
+      } else {
+        setErrNo(28);
+        return -1;
+      }
+      HEAP32[((tp)>>2)] = (now/1000)|0; // seconds
+      HEAP32[(((tp)+(4))>>2)] = ((now % 1000)*1000*1000)|0; // nanoseconds
+      return 0;
+    }
+
+  var readAsmConstArgsArray = [];
+  function readAsmConstArgs(sigPtr, buf) {
+      ;
+      readAsmConstArgsArray.length = 0;
+      var ch;
+      // Most arguments are i32s, so shift the buffer pointer so it is a plain
+      // index into HEAP32.
+      buf >>= 2;
+      while (ch = HEAPU8[sigPtr++]) {
+        // A double takes two 32-bit slots, and must also be aligned - the backend
+        // will emit padding to avoid that.
+        var readAsmConstArgsDouble = ch < 105;
+        if (readAsmConstArgsDouble && (buf & 1)) buf++;
+        readAsmConstArgsArray.push(readAsmConstArgsDouble ? HEAPF64[buf++ >> 1] : HEAP32[buf]);
+        ++buf;
+      }
+      return readAsmConstArgsArray;
+    }
+  function _emscripten_asm_const_int(code, sigPtr, argbuf) {
+      var args = readAsmConstArgs(sigPtr, argbuf);
+      return ASM_CONSTS[code].apply(null, args);
+    }
+
+
+  var _emscripten_memcpy_big =  Uint8Array.prototype.copyWithin
+    ? function(dest, src, num) { HEAPU8.copyWithin(dest, src, src + num); }
+    : function(dest, src, num) { HEAPU8.set(HEAPU8.subarray(src, src+num), dest); }
+  ;
+
+  function emscripten_realloc_buffer(size) {
+      try {
+        // round size grow request up to wasm page size (fixed 64KB per spec)
+        wasmMemory.grow((size - buffer.byteLength + 65535) >>> 16); // .grow() takes a delta compared to the previous size
+        updateGlobalBufferAndViews(wasmMemory.buffer);
+        return 1 /*success*/;
+      } catch(e) {
+      }
+      // implicit 0 return to save code size (caller will cast "undefined" into 0
+      // anyhow)
+    }
+  function _emscripten_resize_heap(requestedSize) {
+      var oldSize = HEAPU8.length;
+      requestedSize = requestedSize >>> 0;
+      // With pthreads, races can happen (another thread might increase the size in between), so return a failure, and let the caller retry.
+  
+      // Memory resize rules:
+      // 1. Always increase heap size to at least the requested size, rounded up to next page multiple.
+      // 2a. If MEMORY_GROWTH_LINEAR_STEP == -1, excessively resize the heap geometrically: increase the heap size according to
+      //                                         MEMORY_GROWTH_GEOMETRIC_STEP factor (default +20%),
+      //                                         At most overreserve by MEMORY_GROWTH_GEOMETRIC_CAP bytes (default 96MB).
+      // 2b. If MEMORY_GROWTH_LINEAR_STEP != -1, excessively resize the heap linearly: increase the heap size by at least MEMORY_GROWTH_LINEAR_STEP bytes.
+      // 3. Max size for the heap is capped at 2048MB-WASM_PAGE_SIZE, or by MAXIMUM_MEMORY, or by ASAN limit, depending on which is smallest
+      // 4. If we were unable to allocate as much memory, it may be due to over-eager decision to excessively reserve due to (3) above.
+      //    Hence if an allocation fails, cut down on the amount of excess growth, in an attempt to succeed to perform a smaller allocation.
+  
+      // A limit is set for how much we can grow. We should not exceed that
+      // (the wasm binary specifies it, so if we tried, we'd fail anyhow).
+      // In CAN_ADDRESS_2GB mode, stay one Wasm page short of 4GB: while e.g. Chrome is able to allocate full 4GB Wasm memories, the size will wrap
+      // back to 0 bytes in Wasm side for any code that deals with heap sizes, which would require special casing all heap size related code to treat
+      // 0 specially.
+      var maxHeapSize = MAX_HEAP_SIZE;
+      if (requestedSize > maxHeapSize) {
+        return false;
+      }
+  
+      // Loop through potential heap size increases. If we attempt a too eager reservation that fails, cut down on the
+      // attempted size and reserve a smaller bump instead. (max 3 times, chosen somewhat arbitrarily)
+      for (var cutDown = 1; cutDown <= 4; cutDown *= 2) {
+        var overGrownHeapSize = oldSize * (1 + 0.2 / cutDown); // ensure geometric growth
+        // but limit overreserving (default to capping at +96MB overgrowth at most)
+        overGrownHeapSize = Math.min(overGrownHeapSize, requestedSize + 100663296 );
+  
+        var newSize = Math.min(maxHeapSize, alignUp(Math.max(requestedSize, overGrownHeapSize), 65536));
+  
+        var replacement = emscripten_realloc_buffer(newSize);
+        if (replacement) {
+  
+          return true;
+        }
+      }
+      return false;
+    }
+
+  var ENV = {};
+  
+  function getExecutableName() {
+      return thisProgram || './this.program';
+    }
+  function getEnvStrings() {
+      if (!getEnvStrings.strings) {
+        // Default values.
+        // Browser language detection #8751
+        var lang = ((typeof navigator === 'object' && navigator.languages && navigator.languages[0]) || 'C').replace('-', '_') + '.UTF-8';
+        var env = {
+          'USER': 'web_user',
+          'LOGNAME': 'web_user',
+          'PATH': '/',
+          'PWD': '/',
+          'HOME': '/home/web_user',
+          'LANG': lang,
+          '_': getExecutableName()
+        };
+        // Apply the user-provided values, if any.
+        for (var x in ENV) {
+          // x is a key in ENV; if ENV[x] is undefined, that means it was
+          // explicitly set to be so. We allow user code to do that to
+          // force variables with default values to remain unset.
+          if (ENV[x] === undefined) delete env[x];
+          else env[x] = ENV[x];
+        }
+        var strings = [];
+        for (var x in env) {
+          strings.push(x + '=' + env[x]);
+        }
+        getEnvStrings.strings = strings;
+      }
+      return getEnvStrings.strings;
+    }
+  function _environ_get(__environ, environ_buf) {
+      var bufSize = 0;
+      getEnvStrings().forEach(function(string, i) {
+        var ptr = environ_buf + bufSize;
+        HEAP32[(((__environ)+(i * 4))>>2)] = ptr;
+        writeAsciiToMemory(string, ptr);
+        bufSize += string.length + 1;
+      });
+      return 0;
+    }
+
+  function _environ_sizes_get(penviron_count, penviron_buf_size) {
+      var strings = getEnvStrings();
+      HEAP32[((penviron_count)>>2)] = strings.length;
+      var bufSize = 0;
+      strings.forEach(function(string) {
+        bufSize += string.length + 1;
+      });
+      HEAP32[((penviron_buf_size)>>2)] = bufSize;
+      return 0;
+    }
+
+  function _exit(status) {
+      // void _exit(int status);
+      // http://pubs.opengroup.org/onlinepubs/000095399/functions/exit.html
+      exit(status);
+    }
+
+  function _fd_close(fd) {
+      return 0;
+    }
+
+  function _fd_fdstat_get(fd, pbuf) {
+      // hack to support printf in SYSCALLS_REQUIRE_FILESYSTEM=0
+      var type = fd == 1 || fd == 2 ? 2 : abort();
+      HEAP8[((pbuf)>>0)] = type;
+      // TODO HEAP16[(((pbuf)+(2))>>1)] = ?;
+      // TODO (tempI64 = [?>>>0,(tempDouble=?,(+(Math.abs(tempDouble))) >= 1.0 ? (tempDouble > 0.0 ? ((Math.min((+(Math.floor((tempDouble)/4294967296.0))), 4294967295.0))|0)>>>0 : (~~((+(Math.ceil((tempDouble - +(((~~(tempDouble)))>>>0))/4294967296.0)))))>>>0) : 0)],HEAP32[(((pbuf)+(8))>>2)] = tempI64[0],HEAP32[(((pbuf)+(12))>>2)] = tempI64[1]);
+      // TODO (tempI64 = [?>>>0,(tempDouble=?,(+(Math.abs(tempDouble))) >= 1.0 ? (tempDouble > 0.0 ? ((Math.min((+(Math.floor((tempDouble)/4294967296.0))), 4294967295.0))|0)>>>0 : (~~((+(Math.ceil((tempDouble - +(((~~(tempDouble)))>>>0))/4294967296.0)))))>>>0) : 0)],HEAP32[(((pbuf)+(16))>>2)] = tempI64[0],HEAP32[(((pbuf)+(20))>>2)] = tempI64[1]);
+      return 0;
+    }
+
+  function _fd_read(fd, iov, iovcnt, pnum) {
+      var stream = SYSCALLS.getStreamFromFD(fd);
+      var num = SYSCALLS.doReadv(stream, iov, iovcnt);
+      HEAP32[((pnum)>>2)] = num;
+      return 0;
+    }
+
+  function _fd_seek(fd, offset_low, offset_high, whence, newOffset) {
+  }
+
+  function flush_NO_FILESYSTEM() {
+      // flush anything remaining in the buffers during shutdown
+      if (typeof _fflush !== 'undefined') _fflush(0);
+      var buffers = SYSCALLS.buffers;
+      if (buffers[1].length) SYSCALLS.printChar(1, 10);
+      if (buffers[2].length) SYSCALLS.printChar(2, 10);
+    }
+  function _fd_write(fd, iov, iovcnt, pnum) {
+      ;
+      // hack to support printf in SYSCALLS_REQUIRE_FILESYSTEM=0
+      var num = 0;
+      for (var i = 0; i < iovcnt; i++) {
+        var ptr = HEAP32[((iov)>>2)];
+        var len = HEAP32[(((iov)+(4))>>2)];
+        iov += 8;
+        for (var j = 0; j < len; j++) {
+          SYSCALLS.printChar(fd, HEAPU8[ptr+j]);
+        }
+        num += len;
+      }
+      HEAP32[((pnum)>>2)] = num;
+      return 0;
+    }
+
+  function _gettimeofday(ptr) {
+      var now = Date.now();
+      HEAP32[((ptr)>>2)] = (now/1000)|0; // seconds
+      HEAP32[(((ptr)+(4))>>2)] = ((now % 1000)*1000)|0; // microseconds
+      return 0;
+    }
+
+
+
+  function _mktime(tmPtr) {
+      _tzset();
+      var date = new Date(HEAP32[(((tmPtr)+(20))>>2)] + 1900,
+                          HEAP32[(((tmPtr)+(16))>>2)],
+                          HEAP32[(((tmPtr)+(12))>>2)],
+                          HEAP32[(((tmPtr)+(8))>>2)],
+                          HEAP32[(((tmPtr)+(4))>>2)],
+                          HEAP32[((tmPtr)>>2)],
+                          0);
+  
+      // There's an ambiguous hour when the time goes back; the tm_isdst field is
+      // used to disambiguate it.  Date() basically guesses, so we fix it up if it
+      // guessed wrong, or fill in tm_isdst with the guess if it's -1.
+      var dst = HEAP32[(((tmPtr)+(32))>>2)];
+      var guessedOffset = date.getTimezoneOffset();
+      var start = new Date(date.getFullYear(), 0, 1);
+      var summerOffset = new Date(date.getFullYear(), 6, 1).getTimezoneOffset();
+      var winterOffset = start.getTimezoneOffset();
+      var dstOffset = Math.min(winterOffset, summerOffset); // DST is in December in South
+      if (dst < 0) {
+        // Attention: some regions don't have DST at all.
+        HEAP32[(((tmPtr)+(32))>>2)] = Number(summerOffset != winterOffset && dstOffset == guessedOffset);
+      } else if ((dst > 0) != (dstOffset == guessedOffset)) {
+        var nonDstOffset = Math.max(winterOffset, summerOffset);
+        var trueOffset = dst > 0 ? dstOffset : nonDstOffset;
+        // Don't try setMinutes(date.getMinutes() + ...) -- it's messed up.
+        date.setTime(date.getTime() + (trueOffset - guessedOffset)*60000);
+      }
+  
+      HEAP32[(((tmPtr)+(24))>>2)] = date.getDay();
+      var yday = ((date.getTime() - start.getTime()) / (1000 * 60 * 60 * 24))|0;
+      HEAP32[(((tmPtr)+(28))>>2)] = yday;
+      // To match expected behavior, update fields from date
+      HEAP32[((tmPtr)>>2)] = date.getSeconds();
+      HEAP32[(((tmPtr)+(4))>>2)] = date.getMinutes();
+      HEAP32[(((tmPtr)+(8))>>2)] = date.getHours();
+      HEAP32[(((tmPtr)+(12))>>2)] = date.getDate();
+      HEAP32[(((tmPtr)+(16))>>2)] = date.getMonth();
+  
+      return (date.getTime() / 1000)|0;
+    }
+
+  function _setTempRet0(val) {
+      setTempRet0(val);
+    }
+
+  function __isLeapYear(year) {
+        return year%4 === 0 && (year%100 !== 0 || year%400 === 0);
+    }
+  
+  function __arraySum(array, index) {
+      var sum = 0;
+      for (var i = 0; i <= index; sum += array[i++]) {
+        // no-op
+      }
+      return sum;
+    }
+  
+  var __MONTH_DAYS_LEAP = [31,29,31,30,31,30,31,31,30,31,30,31];
+  
+  var __MONTH_DAYS_REGULAR = [31,28,31,30,31,30,31,31,30,31,30,31];
+  function __addDays(date, days) {
+      var newDate = new Date(date.getTime());
+      while (days > 0) {
+        var leap = __isLeapYear(newDate.getFullYear());
+        var currentMonth = newDate.getMonth();
+        var daysInCurrentMonth = (leap ? __MONTH_DAYS_LEAP : __MONTH_DAYS_REGULAR)[currentMonth];
+  
+        if (days > daysInCurrentMonth-newDate.getDate()) {
+          // we spill over to next month
+          days -= (daysInCurrentMonth-newDate.getDate()+1);
+          newDate.setDate(1);
+          if (currentMonth < 11) {
+            newDate.setMonth(currentMonth+1)
+          } else {
+            newDate.setMonth(0);
+            newDate.setFullYear(newDate.getFullYear()+1);
+          }
+        } else {
+          // we stay in current month
+          newDate.setDate(newDate.getDate()+days);
+          return newDate;
+        }
+      }
+  
+      return newDate;
+    }
+  function _strftime(s, maxsize, format, tm) {
+      // size_t strftime(char *restrict s, size_t maxsize, const char *restrict format, const struct tm *restrict timeptr);
+      // http://pubs.opengroup.org/onlinepubs/009695399/functions/strftime.html
+  
+      var tm_zone = HEAP32[(((tm)+(40))>>2)];
+  
+      var date = {
+        tm_sec: HEAP32[((tm)>>2)],
+        tm_min: HEAP32[(((tm)+(4))>>2)],
+        tm_hour: HEAP32[(((tm)+(8))>>2)],
+        tm_mday: HEAP32[(((tm)+(12))>>2)],
+        tm_mon: HEAP32[(((tm)+(16))>>2)],
+        tm_year: HEAP32[(((tm)+(20))>>2)],
+        tm_wday: HEAP32[(((tm)+(24))>>2)],
+        tm_yday: HEAP32[(((tm)+(28))>>2)],
+        tm_isdst: HEAP32[(((tm)+(32))>>2)],
+        tm_gmtoff: HEAP32[(((tm)+(36))>>2)],
+        tm_zone: tm_zone ? UTF8ToString(tm_zone) : ''
+      };
+  
+      var pattern = UTF8ToString(format);
+  
+      // expand format
+      var EXPANSION_RULES_1 = {
+        '%c': '%a %b %d %H:%M:%S %Y',     // Replaced by the locale's appropriate date and time representation - e.g., Mon Aug  3 14:02:01 2013
+        '%D': '%m/%d/%y',                 // Equivalent to %m / %d / %y
+        '%F': '%Y-%m-%d',                 // Equivalent to %Y - %m - %d
+        '%h': '%b',                       // Equivalent to %b
+        '%r': '%I:%M:%S %p',              // Replaced by the time in a.m. and p.m. notation
+        '%R': '%H:%M',                    // Replaced by the time in 24-hour notation
+        '%T': '%H:%M:%S',                 // Replaced by the time
+        '%x': '%m/%d/%y',                 // Replaced by the locale's appropriate date representation
+        '%X': '%H:%M:%S',                 // Replaced by the locale's appropriate time representation
+        // Modified Conversion Specifiers
+        '%Ec': '%c',                      // Replaced by the locale's alternative appropriate date and time representation.
+        '%EC': '%C',                      // Replaced by the name of the base year (period) in the locale's alternative representation.
+        '%Ex': '%m/%d/%y',                // Replaced by the locale's alternative date representation.
+        '%EX': '%H:%M:%S',                // Replaced by the locale's alternative time representation.
+        '%Ey': '%y',                      // Replaced by the offset from %EC (year only) in the locale's alternative representation.
+        '%EY': '%Y',                      // Replaced by the full alternative year representation.
+        '%Od': '%d',                      // Replaced by the day of the month, using the locale's alternative numeric symbols, filled as needed with leading zeros if there is any alternative symbol for zero; otherwise, with leading <space> characters.
+        '%Oe': '%e',                      // Replaced by the day of the month, using the locale's alternative numeric symbols, filled as needed with leading <space> characters.
+        '%OH': '%H',                      // Replaced by the hour (24-hour clock) using the locale's alternative numeric symbols.
+        '%OI': '%I',                      // Replaced by the hour (12-hour clock) using the locale's alternative numeric symbols.
+        '%Om': '%m',                      // Replaced by the month using the locale's alternative numeric symbols.
+        '%OM': '%M',                      // Replaced by the minutes using the locale's alternative numeric symbols.
+        '%OS': '%S',                      // Replaced by the seconds using the locale's alternative numeric symbols.
+        '%Ou': '%u',                      // Replaced by the weekday as a number in the locale's alternative representation (Monday=1).
+        '%OU': '%U',                      // Replaced by the week number of the year (Sunday as the first day of the week, rules corresponding to %U ) using the locale's alternative numeric symbols.
+        '%OV': '%V',                      // Replaced by the week number of the year (Monday as the first day of the week, rules corresponding to %V ) using the locale's alternative numeric symbols.
+        '%Ow': '%w',                      // Replaced by the number of the weekday (Sunday=0) using the locale's alternative numeric symbols.
+        '%OW': '%W',                      // Replaced by the week number of the year (Monday as the first day of the week) using the locale's alternative numeric symbols.
+        '%Oy': '%y',                      // Replaced by the year (offset from %C ) using the locale's alternative numeric symbols.
+      };
+      for (var rule in EXPANSION_RULES_1) {
+        pattern = pattern.replace(new RegExp(rule, 'g'), EXPANSION_RULES_1[rule]);
+      }
+  
+      var WEEKDAYS = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'];
+      var MONTHS = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'];
+  
+      function leadingSomething(value, digits, character) {
+        var str = typeof value === 'number' ? value.toString() : (value || '');
+        while (str.length < digits) {
+          str = character[0]+str;
+        }
+        return str;
+      }
+  
+      function leadingNulls(value, digits) {
+        return leadingSomething(value, digits, '0');
+      }
+  
+      function compareByDay(date1, date2) {
+        function sgn(value) {
+          return value < 0 ? -1 : (value > 0 ? 1 : 0);
+        }
+  
+        var compare;
+        if ((compare = sgn(date1.getFullYear()-date2.getFullYear())) === 0) {
+          if ((compare = sgn(date1.getMonth()-date2.getMonth())) === 0) {
+            compare = sgn(date1.getDate()-date2.getDate());
+          }
+        }
+        return compare;
+      }
+  
+      function getFirstWeekStartDate(janFourth) {
+          switch (janFourth.getDay()) {
+            case 0: // Sunday
+              return new Date(janFourth.getFullYear()-1, 11, 29);
+            case 1: // Monday
+              return janFourth;
+            case 2: // Tuesday
+              return new Date(janFourth.getFullYear(), 0, 3);
+            case 3: // Wednesday
+              return new Date(janFourth.getFullYear(), 0, 2);
+            case 4: // Thursday
+              return new Date(janFourth.getFullYear(), 0, 1);
+            case 5: // Friday
+              return new Date(janFourth.getFullYear()-1, 11, 31);
+            case 6: // Saturday
+              return new Date(janFourth.getFullYear()-1, 11, 30);
+          }
+      }
+  
+      function getWeekBasedYear(date) {
+          var thisDate = __addDays(new Date(date.tm_year+1900, 0, 1), date.tm_yday);
+  
+          var janFourthThisYear = new Date(thisDate.getFullYear(), 0, 4);
+          var janFourthNextYear = new Date(thisDate.getFullYear()+1, 0, 4);
+  
+          var firstWeekStartThisYear = getFirstWeekStartDate(janFourthThisYear);
+          var firstWeekStartNextYear = getFirstWeekStartDate(janFourthNextYear);
+  
+          if (compareByDay(firstWeekStartThisYear, thisDate) <= 0) {
+            // this date is after the start of the first week of this year
+            if (compareByDay(firstWeekStartNextYear, thisDate) <= 0) {
+              return thisDate.getFullYear()+1;
+            } else {
+              return thisDate.getFullYear();
+            }
+          } else {
+            return thisDate.getFullYear()-1;
+          }
+      }
+  
+      var EXPANSION_RULES_2 = {
+        '%a': function(date) {
+          return WEEKDAYS[date.tm_wday].substring(0,3);
+        },
+        '%A': function(date) {
+          return WEEKDAYS[date.tm_wday];
+        },
+        '%b': function(date) {
+          return MONTHS[date.tm_mon].substring(0,3);
+        },
+        '%B': function(date) {
+          return MONTHS[date.tm_mon];
+        },
+        '%C': function(date) {
+          var year = date.tm_year+1900;
+          return leadingNulls((year/100)|0,2);
+        },
+        '%d': function(date) {
+          return leadingNulls(date.tm_mday, 2);
+        },
+        '%e': function(date) {
+          return leadingSomething(date.tm_mday, 2, ' ');
+        },
+        '%g': function(date) {
+          // %g, %G, and %V give values according to the ISO 8601:2000 standard week-based year.
+          // In this system, weeks begin on a Monday and week 1 of the year is the week that includes
+          // January 4th, which is also the week that includes the first Thursday of the year, and
+          // is also the first week that contains at least four days in the year.
+          // If the first Monday of January is the 2nd, 3rd, or 4th, the preceding days are part of
+          // the last week of the preceding year; thus, for Saturday 2nd January 1999,
+          // %G is replaced by 1998 and %V is replaced by 53. If December 29th, 30th,
+          // or 31st is a Monday, it and any following days are part of week 1 of the following year.
+          // Thus, for Tuesday 30th December 1997, %G is replaced by 1998 and %V is replaced by 01.
+  
+          return getWeekBasedYear(date).toString().substring(2);
+        },
+        '%G': function(date) {
+          return getWeekBasedYear(date);
+        },
+        '%H': function(date) {
+          return leadingNulls(date.tm_hour, 2);
+        },
+        '%I': function(date) {
+          var twelveHour = date.tm_hour;
+          if (twelveHour == 0) twelveHour = 12;
+          else if (twelveHour > 12) twelveHour -= 12;
+          return leadingNulls(twelveHour, 2);
+        },
+        '%j': function(date) {
+          // Day of the year (001-366)
+          return leadingNulls(date.tm_mday+__arraySum(__isLeapYear(date.tm_year+1900) ? __MONTH_DAYS_LEAP : __MONTH_DAYS_REGULAR, date.tm_mon-1), 3);
+        },
+        '%m': function(date) {
+          return leadingNulls(date.tm_mon+1, 2);
+        },
+        '%M': function(date) {
+          return leadingNulls(date.tm_min, 2);
+        },
+        '%n': function() {
+          return '\n';
+        },
+        '%p': function(date) {
+          if (date.tm_hour >= 0 && date.tm_hour < 12) {
+            return 'AM';
+          } else {
+            return 'PM';
+          }
+        },
+        '%S': function(date) {
+          return leadingNulls(date.tm_sec, 2);
+        },
+        '%t': function() {
+          return '\t';
+        },
+        '%u': function(date) {
+          return date.tm_wday || 7;
+        },
+        '%U': function(date) {
+          // Replaced by the week number of the year as a decimal number [00,53].
+          // The first Sunday of January is the first day of week 1;
+          // days in the new year before this are in week 0. [ tm_year, tm_wday, tm_yday]
+          var janFirst = new Date(date.tm_year+1900, 0, 1);
+          var firstSunday = janFirst.getDay() === 0 ? janFirst : __addDays(janFirst, 7-janFirst.getDay());
+          var endDate = new Date(date.tm_year+1900, date.tm_mon, date.tm_mday);
+  
+          // is target date after the first Sunday?
+          if (compareByDay(firstSunday, endDate) < 0) {
+            // calculate difference in days between first Sunday and endDate
+            var februaryFirstUntilEndMonth = __arraySum(__isLeapYear(endDate.getFullYear()) ? __MONTH_DAYS_LEAP : __MONTH_DAYS_REGULAR, endDate.getMonth()-1)-31;
+            var firstSundayUntilEndJanuary = 31-firstSunday.getDate();
+            var days = firstSundayUntilEndJanuary+februaryFirstUntilEndMonth+endDate.getDate();
+            return leadingNulls(Math.ceil(days/7), 2);
+          }
+  
+          return compareByDay(firstSunday, janFirst) === 0 ? '01': '00';
+        },
+        '%V': function(date) {
+          // Replaced by the week number of the year (Monday as the first day of the week)
+          // as a decimal number [01,53]. If the week containing 1 January has four
+          // or more days in the new year, then it is considered week 1.
+          // Otherwise, it is the last week of the previous year, and the next week is week 1.
+          // Both January 4th and the first Thursday of January are always in week 1. [ tm_year, tm_wday, tm_yday]
+          var janFourthThisYear = new Date(date.tm_year+1900, 0, 4);
+          var janFourthNextYear = new Date(date.tm_year+1901, 0, 4);
+  
+          var firstWeekStartThisYear = getFirstWeekStartDate(janFourthThisYear);
+          var firstWeekStartNextYear = getFirstWeekStartDate(janFourthNextYear);
+  
+          var endDate = __addDays(new Date(date.tm_year+1900, 0, 1), date.tm_yday);
+  
+          if (compareByDay(endDate, firstWeekStartThisYear) < 0) {
+            // if given date is before this years first week, then it belongs to the 53rd week of last year
+            return '53';
+          }
+  
+          if (compareByDay(firstWeekStartNextYear, endDate) <= 0) {
+            // if given date is after next years first week, then it belongs to the 01th week of next year
+            return '01';
+          }
+  
+          // given date is in between CW 01..53 of this calendar year
+          var daysDifference;
+          if (firstWeekStartThisYear.getFullYear() < date.tm_year+1900) {
+            // first CW of this year starts last year
+            daysDifference = date.tm_yday+32-firstWeekStartThisYear.getDate()
+          } else {
+            // first CW of this year starts this year
+            daysDifference = date.tm_yday+1-firstWeekStartThisYear.getDate();
+          }
+          return leadingNulls(Math.ceil(daysDifference/7), 2);
+        },
+        '%w': function(date) {
+          return date.tm_wday;
+        },
+        '%W': function(date) {
+          // Replaced by the week number of the year as a decimal number [00,53].
+          // The first Monday of January is the first day of week 1;
+          // days in the new year before this are in week 0. [ tm_year, tm_wday, tm_yday]
+          var janFirst = new Date(date.tm_year, 0, 1);
+          var firstMonday = janFirst.getDay() === 1 ? janFirst : __addDays(janFirst, janFirst.getDay() === 0 ? 1 : 7-janFirst.getDay()+1);
+          var endDate = new Date(date.tm_year+1900, date.tm_mon, date.tm_mday);
+  
+          // is target date after the first Monday?
+          if (compareByDay(firstMonday, endDate) < 0) {
+            var februaryFirstUntilEndMonth = __arraySum(__isLeapYear(endDate.getFullYear()) ? __MONTH_DAYS_LEAP : __MONTH_DAYS_REGULAR, endDate.getMonth()-1)-31;
+            var firstMondayUntilEndJanuary = 31-firstMonday.getDate();
+            var days = firstMondayUntilEndJanuary+februaryFirstUntilEndMonth+endDate.getDate();
+            return leadingNulls(Math.ceil(days/7), 2);
+          }
+          return compareByDay(firstMonday, janFirst) === 0 ? '01': '00';
+        },
+        '%y': function(date) {
+          // Replaced by the last two digits of the year as a decimal number [00,99]. [ tm_year]
+          return (date.tm_year+1900).toString().substring(2);
+        },
+        '%Y': function(date) {
+          // Replaced by the year as a decimal number (for example, 1997). [ tm_year]
+          return date.tm_year+1900;
+        },
+        '%z': function(date) {
+          // Replaced by the offset from UTC in the ISO 8601:2000 standard format ( +hhmm or -hhmm ).
+          // For example, "-0430" means 4 hours 30 minutes behind UTC (west of Greenwich).
+          var off = date.tm_gmtoff;
+          var ahead = off >= 0;
+          off = Math.abs(off) / 60;
+          // convert from minutes into hhmm format (which means 60 minutes = 100 units)
+          off = (off / 60)*100 + (off % 60);
+          return (ahead ? '+' : '-') + String("0000" + off).slice(-4);
+        },
+        '%Z': function(date) {
+          return date.tm_zone;
+        },
+        '%%': function() {
+          return '%';
+        }
+      };
+      for (var rule in EXPANSION_RULES_2) {
+        if (pattern.includes(rule)) {
+          pattern = pattern.replace(new RegExp(rule, 'g'), EXPANSION_RULES_2[rule](date));
+        }
+      }
+  
+      var bytes = intArrayFromString(pattern, false);
+      if (bytes.length > maxsize) {
+        return 0;
+      }
+  
+      writeArrayToMemory(bytes, s);
+      return bytes.length-1;
+    }
+
+  function _strftime_l(s, maxsize, format, tm) {
+      return _strftime(s, maxsize, format, tm); // no locale support yet
+    }
+
+  function _time(ptr) {
+      ;
+      var ret = (Date.now()/1000)|0;
+      if (ptr) {
+        HEAP32[((ptr)>>2)] = ret;
+      }
+      return ret;
+    }
+
+InternalError = Module['InternalError'] = extendError(Error, 'InternalError');;
+embind_init_charCodes();
+BindingError = Module['BindingError'] = extendError(Error, 'BindingError');;
+init_ClassHandle();
+init_RegisteredPointer();
+init_embind();;
+UnboundTypeError = Module['UnboundTypeError'] = extendError(Error, 'UnboundTypeError');;
+init_emval();;
+var ASSERTIONS = false;
+
+
+
+/** @type {function(string, boolean=, number=)} */
+function intArrayFromString(stringy, dontAddNull, length) {
+  var len = length > 0 ? length : lengthBytesUTF8(stringy)+1;
+  var u8array = new Array(len);
+  var numBytesWritten = stringToUTF8Array(stringy, u8array, 0, u8array.length);
+  if (dontAddNull) u8array.length = numBytesWritten;
+  return u8array;
+}
+
+function intArrayToString(array) {
+  var ret = [];
+  for (var i = 0; i < array.length; i++) {
+    var chr = array[i];
+    if (chr > 0xFF) {
+      if (ASSERTIONS) {
+        assert(false, 'Character code ' + chr + ' (' + String.fromCharCode(chr) + ')  at offset ' + i + ' not in 0x00-0xFF.');
+      }
+      chr &= 0xFF;
+    }
+    ret.push(String.fromCharCode(chr));
+  }
+  return ret.join('');
+}
+
+
+var asmLibraryArg = {
+  "__asyncjs__wasm_ffmpeg_fopen_sync": __asyncjs__wasm_ffmpeg_fopen_sync,
+  "__asyncjs__wasm_ffmpeg_fread_sync": __asyncjs__wasm_ffmpeg_fread_sync,
+  "__cxa_allocate_exception": ___cxa_allocate_exception,
+  "__cxa_atexit": ___cxa_atexit,
+  "__cxa_throw": ___cxa_throw,
+  "__gmtime_r": ___gmtime_r,
+  "__localtime_r": ___localtime_r,
+  "__syscall__newselect": ___syscall__newselect,
+  "__syscall_fcntl64": ___syscall_fcntl64,
+  "__syscall_ioctl": ___syscall_ioctl,
+  "__syscall_mkdir": ___syscall_mkdir,
+  "__syscall_open": ___syscall_open,
+  "__syscall_rmdir": ___syscall_rmdir,
+  "__syscall_unlink": ___syscall_unlink,
+  "_embind_finalize_value_object": __embind_finalize_value_object,
+  "_embind_register_bigint": __embind_register_bigint,
+  "_embind_register_bool": __embind_register_bool,
+  "_embind_register_class": __embind_register_class,
+  "_embind_register_class_constructor": __embind_register_class_constructor,
+  "_embind_register_class_function": __embind_register_class_function,
+  "_embind_register_emval": __embind_register_emval,
+  "_embind_register_float": __embind_register_float,
+  "_embind_register_function": __embind_register_function,
+  "_embind_register_integer": __embind_register_integer,
+  "_embind_register_memory_view": __embind_register_memory_view,
+  "_embind_register_std_string": __embind_register_std_string,
+  "_embind_register_std_wstring": __embind_register_std_wstring,
+  "_embind_register_value_object": __embind_register_value_object,
+  "_embind_register_value_object_field": __embind_register_value_object_field,
+  "_embind_register_void": __embind_register_void,
+  "abort": _abort,
+  "clock": _clock,
+  "clock_gettime": _clock_gettime,
+  "emscripten_asm_const_int": _emscripten_asm_const_int,
+  "emscripten_get_now": _emscripten_get_now,
+  "emscripten_memcpy_big": _emscripten_memcpy_big,
+  "emscripten_resize_heap": _emscripten_resize_heap,
+  "environ_get": _environ_get,
+  "environ_sizes_get": _environ_sizes_get,
+  "exit": _exit,
+  "fd_close": _fd_close,
+  "fd_fdstat_get": _fd_fdstat_get,
+  "fd_read": _fd_read,
+  "fd_seek": _fd_seek,
+  "fd_write": _fd_write,
+  "gettimeofday": _gettimeofday,
+  "gmtime_r": _gmtime_r,
+  "localtime_r": _localtime_r,
+  "mktime": _mktime,
+  "setTempRet0": _setTempRet0,
+  "strftime": _strftime,
+  "strftime_l": _strftime_l,
+  "time": _time
+};
+var asm = createWasm();
+/** @type {function(...*):?} */
+var ___wasm_call_ctors = Module["___wasm_call_ctors"] = function() {
+  return (___wasm_call_ctors = Module["___wasm_call_ctors"] = Module["asm"]["__wasm_call_ctors"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var ___getTypeName = Module["___getTypeName"] = function() {
+  return (___getTypeName = Module["___getTypeName"] = Module["asm"]["__getTypeName"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var ___embind_register_native_and_builtin_types = Module["___embind_register_native_and_builtin_types"] = function() {
+  return (___embind_register_native_and_builtin_types = Module["___embind_register_native_and_builtin_types"] = Module["asm"]["__embind_register_native_and_builtin_types"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var _free = Module["_free"] = function() {
+  return (_free = Module["_free"] = Module["asm"]["free"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var _malloc = Module["_malloc"] = function() {
+  return (_malloc = Module["_malloc"] = Module["asm"]["malloc"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var ___errno_location = Module["___errno_location"] = function() {
+  return (___errno_location = Module["___errno_location"] = Module["asm"]["__errno_location"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var __get_tzname = Module["__get_tzname"] = function() {
+  return (__get_tzname = Module["__get_tzname"] = Module["asm"]["_get_tzname"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var __get_daylight = Module["__get_daylight"] = function() {
+  return (__get_daylight = Module["__get_daylight"] = Module["asm"]["_get_daylight"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var __get_timezone = Module["__get_timezone"] = function() {
+  return (__get_timezone = Module["__get_timezone"] = Module["asm"]["_get_timezone"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var stackSave = Module["stackSave"] = function() {
+  return (stackSave = Module["stackSave"] = Module["asm"]["stackSave"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var stackRestore = Module["stackRestore"] = function() {
+  return (stackRestore = Module["stackRestore"] = Module["asm"]["stackRestore"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var stackAlloc = Module["stackAlloc"] = function() {
+  return (stackAlloc = Module["stackAlloc"] = Module["asm"]["stackAlloc"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var _emscripten_stack_set_limits = Module["_emscripten_stack_set_limits"] = function() {
+  return (_emscripten_stack_set_limits = Module["_emscripten_stack_set_limits"] = Module["asm"]["emscripten_stack_set_limits"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var _emscripten_stack_get_base = Module["_emscripten_stack_get_base"] = function() {
+  return (_emscripten_stack_get_base = Module["_emscripten_stack_get_base"] = Module["asm"]["emscripten_stack_get_base"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var _emscripten_stack_get_end = Module["_emscripten_stack_get_end"] = function() {
+  return (_emscripten_stack_get_end = Module["_emscripten_stack_get_end"] = Module["asm"]["emscripten_stack_get_end"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var _memalign = Module["_memalign"] = function() {
+  return (_memalign = Module["_memalign"] = Module["asm"]["memalign"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var dynCall_vi = Module["dynCall_vi"] = function() {
+  return (dynCall_vi = Module["dynCall_vi"] = Module["asm"]["dynCall_vi"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var dynCall_ii = Module["dynCall_ii"] = function() {
+  return (dynCall_ii = Module["dynCall_ii"] = Module["asm"]["dynCall_ii"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var dynCall_viiii = Module["dynCall_viiii"] = function() {
+  return (dynCall_viiii = Module["dynCall_viiii"] = Module["asm"]["dynCall_viiii"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var dynCall_iiii = Module["dynCall_iiii"] = function() {
+  return (dynCall_iiii = Module["dynCall_iiii"] = Module["asm"]["dynCall_iiii"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var dynCall_iii = Module["dynCall_iii"] = function() {
+  return (dynCall_iii = Module["dynCall_iii"] = Module["asm"]["dynCall_iii"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var dynCall_vii = Module["dynCall_vii"] = function() {
+  return (dynCall_vii = Module["dynCall_vii"] = Module["asm"]["dynCall_vii"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var dynCall_viiiiifiii = Module["dynCall_viiiiifiii"] = function() {
+  return (dynCall_viiiiifiii = Module["dynCall_viiiiifiii"] = Module["asm"]["dynCall_viiiiifiii"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var dynCall_i = Module["dynCall_i"] = function() {
+  return (dynCall_i = Module["dynCall_i"] = Module["asm"]["dynCall_i"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var dynCall_viii = Module["dynCall_viii"] = function() {
+  return (dynCall_viii = Module["dynCall_viii"] = Module["asm"]["dynCall_viii"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var dynCall_iiiiiifiii = Module["dynCall_iiiiiifiii"] = function() {
+  return (dynCall_iiiiiifiii = Module["dynCall_iiiiiifiii"] = Module["asm"]["dynCall_iiiiiifiii"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var dynCall_v = Module["dynCall_v"] = function() {
+  return (dynCall_v = Module["dynCall_v"] = Module["asm"]["dynCall_v"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var dynCall_iiiiii = Module["dynCall_iiiiii"] = function() {
+  return (dynCall_iiiiii = Module["dynCall_iiiiii"] = Module["asm"]["dynCall_iiiiii"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var dynCall_iiiiiii = Module["dynCall_iiiiiii"] = function() {
+  return (dynCall_iiiiiii = Module["dynCall_iiiiiii"] = Module["asm"]["dynCall_iiiiiii"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var dynCall_ijiii = Module["dynCall_ijiii"] = function() {
+  return (dynCall_ijiii = Module["dynCall_ijiii"] = Module["asm"]["dynCall_ijiii"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var dynCall_jiji = Module["dynCall_jiji"] = function() {
+  return (dynCall_jiji = Module["dynCall_jiji"] = Module["asm"]["dynCall_jiji"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var dynCall_iiiji = Module["dynCall_iiiji"] = function() {
+  return (dynCall_iiiji = Module["dynCall_iiiji"] = Module["asm"]["dynCall_iiiji"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var dynCall_viiiiii = Module["dynCall_viiiiii"] = function() {
+  return (dynCall_viiiiii = Module["dynCall_viiiiii"] = Module["asm"]["dynCall_viiiiii"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var dynCall_iiiii = Module["dynCall_iiiii"] = function() {
+  return (dynCall_iiiii = Module["dynCall_iiiii"] = Module["asm"]["dynCall_iiiii"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var dynCall_dd = Module["dynCall_dd"] = function() {
+  return (dynCall_dd = Module["dynCall_dd"] = Module["asm"]["dynCall_dd"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var dynCall_iidiiii = Module["dynCall_iidiiii"] = function() {
+  return (dynCall_iidiiii = Module["dynCall_iidiiii"] = Module["asm"]["dynCall_iidiiii"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var dynCall_viijii = Module["dynCall_viijii"] = function() {
+  return (dynCall_viijii = Module["dynCall_viijii"] = Module["asm"]["dynCall_viijii"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var dynCall_iiiiiiiii = Module["dynCall_iiiiiiiii"] = function() {
+  return (dynCall_iiiiiiiii = Module["dynCall_iiiiiiiii"] = Module["asm"]["dynCall_iiiiiiiii"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var dynCall_iiiiij = Module["dynCall_iiiiij"] = function() {
+  return (dynCall_iiiiij = Module["dynCall_iiiiij"] = Module["asm"]["dynCall_iiiiij"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var dynCall_iiiiid = Module["dynCall_iiiiid"] = function() {
+  return (dynCall_iiiiid = Module["dynCall_iiiiid"] = Module["asm"]["dynCall_iiiiid"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var dynCall_iiiiijj = Module["dynCall_iiiiijj"] = function() {
+  return (dynCall_iiiiijj = Module["dynCall_iiiiijj"] = Module["asm"]["dynCall_iiiiijj"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var dynCall_iiiiiiii = Module["dynCall_iiiiiiii"] = function() {
+  return (dynCall_iiiiiiii = Module["dynCall_iiiiiiii"] = Module["asm"]["dynCall_iiiiiiii"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var dynCall_iiiiiijj = Module["dynCall_iiiiiijj"] = function() {
+  return (dynCall_iiiiiijj = Module["dynCall_iiiiiijj"] = Module["asm"]["dynCall_iiiiiijj"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var dynCall_viiiii = Module["dynCall_viiiii"] = function() {
+  return (dynCall_viiiii = Module["dynCall_viiiii"] = Module["asm"]["dynCall_viiiii"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var _asyncify_start_unwind = Module["_asyncify_start_unwind"] = function() {
+  return (_asyncify_start_unwind = Module["_asyncify_start_unwind"] = Module["asm"]["asyncify_start_unwind"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var _asyncify_stop_unwind = Module["_asyncify_stop_unwind"] = function() {
+  return (_asyncify_stop_unwind = Module["_asyncify_stop_unwind"] = Module["asm"]["asyncify_stop_unwind"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var _asyncify_start_rewind = Module["_asyncify_start_rewind"] = function() {
+  return (_asyncify_start_rewind = Module["_asyncify_start_rewind"] = Module["asm"]["asyncify_start_rewind"]).apply(null, arguments);
+};
+
+/** @type {function(...*):?} */
+var _asyncify_stop_rewind = Module["_asyncify_stop_rewind"] = function() {
+  return (_asyncify_stop_rewind = Module["_asyncify_stop_rewind"] = Module["asm"]["asyncify_stop_rewind"]).apply(null, arguments);
+};
+
+
+
+
+
+// === Auto-generated postamble setup entry stuff ===
+
+Module["ccall"] = ccall;
+Module["cwrap"] = cwrap;
+
+var calledRun;
+
+/**
+ * @constructor
+ * @this {ExitStatus}
+ */
+function ExitStatus(status) {
+  this.name = "ExitStatus";
+  this.message = "Program terminated with exit(" + status + ")";
+  this.status = status;
+}
+
+var calledMain = false;
+
+dependenciesFulfilled = function runCaller() {
+  // If run has never been called, and we should call run (INVOKE_RUN is true, and Module.noInitialRun is not false)
+  if (!calledRun) run();
+  if (!calledRun) dependenciesFulfilled = runCaller; // try this again later, after new deps are fulfilled
+};
+
+/** @type {function(Array=)} */
+function run(args) {
+  args = args || arguments_;
+
+  if (runDependencies > 0) {
+    return;
+  }
+
+  preRun();
+
+  // a preRun added a dependency, run will be called later
+  if (runDependencies > 0) {
+    return;
+  }
+
+  function doRun() {
+    // run may have just been called through dependencies being fulfilled just in this very frame,
+    // or while the async setStatus time below was happening
+    if (calledRun) return;
+    calledRun = true;
+    Module['calledRun'] = true;
+
+    if (ABORT) return;
+
+    initRuntime();
+
+    if (Module['onRuntimeInitialized']) Module['onRuntimeInitialized']();
+
+    postRun();
+  }
+
+  if (Module['setStatus']) {
+    Module['setStatus']('Running...');
+    setTimeout(function() {
+      setTimeout(function() {
+        Module['setStatus']('');
+      }, 1);
+      doRun();
+    }, 1);
+  } else
+  {
+    doRun();
+  }
+}
+Module['run'] = run;
+
+/** @param {boolean|number=} implicit */
+function exit(status, implicit) {
+  EXITSTATUS = status;
+
+  if (keepRuntimeAlive()) {
+  } else {
+    exitRuntime();
+  }
+
+  procExit(status);
+}
+
+function procExit(code) {
+  EXITSTATUS = code;
+  if (!keepRuntimeAlive()) {
+    if (Module['onExit']) Module['onExit'](code);
+    ABORT = true;
+  }
+  quit_(code, new ExitStatus(code));
+}
+
+if (Module['preInit']) {
+  if (typeof Module['preInit'] == 'function') Module['preInit'] = [Module['preInit']];
+  while (Module['preInit'].length > 0) {
+    Module['preInit'].pop()();
+  }
+}
+
+run();
+
+
+
+
+
diff --git a/electron/assets/wasm/wasm_video_decode.wasm b/electron/assets/wasm/wasm_video_decode.wasm
new file mode 100644
index 0000000..839c4d2
Binary files /dev/null and b/electron/assets/wasm/wasm_video_decode.wasm differ
diff --git a/electron/main.ts b/electron/main.ts
index 51ac53f..6f35fb6 100644
--- a/electron/main.ts
+++ b/electron/main.ts
@@ -18,7 +18,7 @@ import { exportService, ExportOptions, ExportProgress } from './services/exportS
 import { KeyService } from './services/keyService'
 import { voiceTranscribeService } from './services/voiceTranscribeService'
 import { videoService } from './services/videoService'
-import { snsService } from './services/snsService'
+import { snsService, isVideoUrl } from './services/snsService'
 import { contactExportService } from './services/contactExportService'
 import { windowsHelloService } from './services/windowsHelloService'
 import { llamaService } from './services/llamaService'
@@ -104,7 +104,8 @@ function createWindow(options: { autoShow?: boolean } = {}) {
     webPreferences: {
       preload: join(__dirname, 'preload.js'),
       contextIsolation: true,
-      nodeIntegration: false
+      nodeIntegration: false,
+      webSecurity: false // Allow loading local files (video playback)
     },
     titleBarStyle: 'hidden',
     titleBarOverlay: {
@@ -938,6 +939,42 @@ function registerIpcHandlers() {
     return snsService.proxyImage(url, key)
   })
 
+  ipcMain.handle('sns:downloadImage', async (_, payload: { url: string; key?: string | number }) => {
+    try {
+      const { url, key } = payload
+      const result = await snsService.downloadImage(url, key)
+
+      if (!result.success || !result.data) {
+        return { success: false, error: result.error || '下载图片失败' }
+      }
+
+      const { dialog } = await import('electron')
+      const ext = (result.contentType || '').split('/')[1] || 'jpg'
+      const defaultPath = `SNS_${Date.now()}.${ext}`
+
+
+      const filters = isVideoUrl(url)
+        ? [{ name: 'Videos', extensions: ['mp4', 'mov', 'avi', 'mkv'] }]
+        : [{ name: 'Images', extensions: [ext, 'jpg', 'jpeg', 'png', 'webp', 'gif'] }]
+
+      const { filePath, canceled } = await dialog.showSaveDialog({
+        defaultPath,
+        filters
+      })
+
+      if (canceled || !filePath) {
+        return { success: false, error: '用户已取消' }
+      }
+
+      const fs = await import('fs/promises')
+      await fs.writeFile(filePath, result.data)
+
+      return { success: true, filePath }
+    } catch (e) {
+      return { success: false, error: String(e) }
+    }
+  })
+
   // 私聊克隆
 
 
diff --git a/electron/preload.ts b/electron/preload.ts
index 41106b5..d44cf5b 100644
--- a/electron/preload.ts
+++ b/electron/preload.ts
@@ -271,7 +271,8 @@ contextBridge.exposeInMainWorld('electronAPI', {
     getTimeline: (limit: number, offset: number, usernames?: string[], keyword?: string, startTime?: number, endTime?: number) =>
       ipcRenderer.invoke('sns:getTimeline', limit, offset, usernames, keyword, startTime, endTime),
     debugResource: (url: string) => ipcRenderer.invoke('sns:debugResource', url),
-    proxyImage: (payload: { url: string; key?: string | number }) => ipcRenderer.invoke('sns:proxyImage', payload)
+    proxyImage: (payload: { url: string; key?: string | number }) => ipcRenderer.invoke('sns:proxyImage', payload),
+    downloadImage: (payload: { url: string; key?: string | number }) => ipcRenderer.invoke('sns:downloadImage', payload)
   },
 
   // Llama AI
diff --git a/electron/services/chatService.ts b/electron/services/chatService.ts
index d27e6c5..afa4a4b 100644
--- a/electron/services/chatService.ts
+++ b/electron/services/chatService.ts
@@ -141,10 +141,10 @@ class ChatService {
 
   constructor() {
     this.configService = new ConfigService()
-    this.contactCacheService = new ContactCacheService(this.configService.get('cachePath'))
+    this.contactCacheService = new ContactCacheService(this.configService.getCacheBasePath())
     const persisted = this.contactCacheService.getAllEntries()
     this.avatarCache = new Map(Object.entries(persisted))
-    this.messageCacheService = new MessageCacheService(this.configService.get('cachePath'))
+    this.messageCacheService = new MessageCacheService(this.configService.getCacheBasePath())
   }
 
   /**
diff --git a/electron/services/config.ts b/electron/services/config.ts
index 4eb0f2b..be606f2 100644
--- a/electron/services/config.ts
+++ b/electron/services/config.ts
@@ -1,3 +1,5 @@
+import { join } from 'path'
+import { app } from 'electron'
 import Store from 'electron-store'
 
 interface ConfigSchema {
@@ -111,6 +113,14 @@ export class ConfigService {
     this.store.set(key, value)
   }
 
+  getCacheBasePath(): string {
+    const configured = this.get('cachePath')
+    if (configured && configured.trim().length > 0) {
+      return configured
+    }
+    return join(app.getPath('documents'), 'WeFlow')
+  }
+
   getAll(): ConfigSchema {
     return this.store.store
   }
diff --git a/electron/services/contactCacheService.ts b/electron/services/contactCacheService.ts
index da17886..a481227 100644
--- a/electron/services/contactCacheService.ts
+++ b/electron/services/contactCacheService.ts
@@ -1,6 +1,7 @@
 import { join, dirname } from 'path'
 import { existsSync, mkdirSync, readFileSync, writeFileSync, rmSync } from 'fs'
 import { app } from 'electron'
+import { ConfigService } from './config'
 
 export interface ContactCacheEntry {
   displayName?: string
@@ -15,7 +16,7 @@ export class ContactCacheService {
   constructor(cacheBasePath?: string) {
     const basePath = cacheBasePath && cacheBasePath.trim().length > 0
       ? cacheBasePath
-      : join(app.getPath('documents'), 'WeFlow')
+      : ConfigService.getInstance().getCacheBasePath()
     this.cacheFilePath = join(basePath, 'contacts.json')
     this.ensureCacheDir()
     this.loadCache()
diff --git a/electron/services/isaac64.ts b/electron/services/isaac64.ts
new file mode 100644
index 0000000..731f6db
--- /dev/null
+++ b/electron/services/isaac64.ts
@@ -0,0 +1,121 @@
+/**
+ * ISAAC-64: A fast cryptographic PRNG
+ * Re-implemented in TypeScript using BigInt for 64-bit support.
+ * Used for WeChat Channels/SNS video decryption.
+ */
+
+export class Isaac64 {
+    private mm = new BigUint64Array(256);
+    private aa = 0n;
+    private bb = 0n;
+    private cc = 0n;
+    private randrsl = new BigUint64Array(256);
+    private randcnt = 0;
+    private static readonly MASK = 0xFFFFFFFFFFFFFFFFn;
+
+    constructor(seed: number | string | bigint) {
+        const seedBig = BigInt(seed);
+        // 通常单密钥初始化是将密钥放在第一个槽位，其余清零（或者按某种规律填充）
+        // 这里我们尝试仅设置第一个槽位，这在很多 WASM 移植版本中更为常见
+        this.randrsl.fill(0n);
+        this.randrsl[0] = seedBig;
+        this.init(true);
+    }
+
+    private init(flag: boolean) {
+        let a: bigint, b: bigint, c: bigint, d: bigint, e: bigint, f: bigint, g: bigint, h: bigint;
+        a = b = c = d = e = f = g = h = 0x9e3779b97f4a7c15n;
+
+        const mix = () => {
+            a = (a - e) & Isaac64.MASK; f ^= (h >> 9n); h = (h + a) & Isaac64.MASK;
+            b = (b - f) & Isaac64.MASK; g ^= (a << 9n) & Isaac64.MASK; a = (a + b) & Isaac64.MASK;
+            c = (c - g) & Isaac64.MASK; h ^= (b >> 23n); b = (b + c) & Isaac64.MASK;
+            d = (d - h) & Isaac64.MASK; a ^= (c << 15n) & Isaac64.MASK; c = (c + d) & Isaac64.MASK;
+            e = (e - a) & Isaac64.MASK; b ^= (d >> 14n); d = (d + e) & Isaac64.MASK;
+            f = (f - b) & Isaac64.MASK; c ^= (e << 20n) & Isaac64.MASK; e = (e + f) & Isaac64.MASK;
+            g = (g - c) & Isaac64.MASK; d ^= (f >> 17n); f = (f + g) & Isaac64.MASK;
+            h = (h - d) & Isaac64.MASK; e ^= (g << 14n) & Isaac64.MASK; g = (g + h) & Isaac64.MASK;
+        };
+
+        for (let i = 0; i < 4; i++) mix();
+
+        for (let i = 0; i < 256; i += 8) {
+            if (flag) {
+                a = (a + this.randrsl[i]) & Isaac64.MASK;
+                b = (b + this.randrsl[i + 1]) & Isaac64.MASK;
+                c = (c + this.randrsl[i + 2]) & Isaac64.MASK;
+                d = (d + this.randrsl[i + 3]) & Isaac64.MASK;
+                e = (e + this.randrsl[i + 4]) & Isaac64.MASK;
+                f = (f + this.randrsl[i + 5]) & Isaac64.MASK;
+                g = (g + this.randrsl[i + 6]) & Isaac64.MASK;
+                h = (h + this.randrsl[i + 7]) & Isaac64.MASK;
+            }
+            mix();
+            this.mm[i] = a; this.mm[i + 1] = b; this.mm[i + 2] = c; this.mm[i + 3] = d;
+            this.mm[i + 4] = e; this.mm[i + 5] = f; this.mm[i + 6] = g; this.mm[i + 7] = h;
+        }
+
+        if (flag) {
+            for (let i = 0; i < 256; i += 8) {
+                a = (a + this.mm[i]) & Isaac64.MASK;
+                b = (b + this.mm[i + 1]) & Isaac64.MASK;
+                c = (c + this.mm[i + 2]) & Isaac64.MASK;
+                d = (d + this.mm[i + 3]) & Isaac64.MASK;
+                e = (e + this.mm[i + 4]) & Isaac64.MASK;
+                f = (f + this.mm[i + 5]) & Isaac64.MASK;
+                g = (g + this.mm[i + 6]) & Isaac64.MASK;
+                h = (h + this.mm[i + 7]) & Isaac64.MASK;
+                mix();
+                this.mm[i] = a; this.mm[i + 1] = b; this.mm[i + 2] = c; this.mm[i + 3] = d;
+                this.mm[i + 4] = e; this.mm[i + 5] = f; this.mm[i + 6] = g; this.mm[i + 7] = h;
+            }
+        }
+
+        this.isaac64();
+        this.randcnt = 256;
+    }
+
+    private isaac64() {
+        this.cc = (this.cc + 1n) & Isaac64.MASK;
+        this.bb = (this.bb + this.cc) & Isaac64.MASK;
+        for (let i = 0; i < 256; i++) {
+            let x = this.mm[i];
+            switch (i & 3) {
+                case 0: this.aa = (this.aa ^ (((this.aa << 21n) & Isaac64.MASK) ^ Isaac64.MASK)) & Isaac64.MASK; break;
+                case 1: this.aa = (this.aa ^ (this.aa >> 5n)) & Isaac64.MASK; break;
+                case 2: this.aa = (this.aa ^ ((this.aa << 12n) & Isaac64.MASK)) & Isaac64.MASK; break;
+                case 3: this.aa = (this.aa ^ (this.aa >> 33n)) & Isaac64.MASK; break;
+            }
+            this.aa = (this.mm[(i + 128) & 255] + this.aa) & Isaac64.MASK;
+            const y = (this.mm[Number(x >> 3n) & 255] + this.aa + this.bb) & Isaac64.MASK;
+            this.mm[i] = y;
+            this.bb = (this.mm[Number(y >> 11n) & 255] + x) & Isaac64.MASK;
+            this.randrsl[i] = this.bb;
+        }
+    }
+
+    public getNext(): bigint {
+        if (this.randcnt === 0) {
+            this.isaac64();
+            this.randcnt = 256;
+        }
+        return this.randrsl[256 - (this.randcnt--)];
+    }
+
+    /**
+     * Generates a keystream of the specified size (in bytes).
+     * @param size Size of the keystream in bytes (must be multiple of 8)
+     * @returns Buffer containing the keystream
+     */
+    public generateKeystream(size: number): Buffer {
+        const stream = new BigUint64Array(size / 8);
+        for (let i = 0; i < stream.length; i++) {
+            stream[i] = this.getNext();
+        }
+        // WeChat's logic specifically reverses the entire byte array
+        const buffer = Buffer.from(stream.buffer);
+        // 注意：根据 worker.html 的逻辑，它是对 Uint8Array 执行 reverse()
+        // Array.from(wasmArray).reverse()
+        return buffer.reverse();
+    }
+}
diff --git a/electron/services/messageCacheService.ts b/electron/services/messageCacheService.ts
index 3b21063..091e5f4 100644
--- a/electron/services/messageCacheService.ts
+++ b/electron/services/messageCacheService.ts
@@ -1,6 +1,7 @@
 import { join, dirname } from 'path'
 import { existsSync, mkdirSync, readFileSync, writeFileSync, rmSync } from 'fs'
 import { app } from 'electron'
+import { ConfigService } from './config'
 
 export interface SessionMessageCacheEntry {
   updatedAt: number
@@ -15,7 +16,7 @@ export class MessageCacheService {
   constructor(cacheBasePath?: string) {
     const basePath = cacheBasePath && cacheBasePath.trim().length > 0
       ? cacheBasePath
-      : join(app.getPath('documents'), 'WeFlow')
+      : ConfigService.getInstance().getCacheBasePath()
     this.cacheFilePath = join(basePath, 'session-messages.json')
     this.ensureCacheDir()
     this.loadCache()
diff --git a/electron/services/snsService.ts b/electron/services/snsService.ts
index 299cecc..dbb4765 100644
--- a/electron/services/snsService.ts
+++ b/electron/services/snsService.ts
@@ -1,8 +1,11 @@
 import { wcdbService } from './wcdbService'
 import { ConfigService } from './config'
 import { ContactCacheService } from './contactCacheService'
-import { existsSync } from 'fs'
+import { existsSync, mkdirSync } from 'fs'
+import { readFile, writeFile, mkdir } from 'fs/promises'
 import { basename, join } from 'path'
+import crypto from 'crypto'
+import { WasmService } from './wasmService'
 
 export interface SnsLivePhoto {
     url: string
@@ -37,81 +40,140 @@ export interface SnsPost {
     rawXml?: string
 }
 
-const WEIXIN_DLL_OFFSET = 0x2674280n
 
-const fixSnsUrl = (url: string, token?: string) => {
+
+const fixSnsUrl = (url: string, token?: string, isVideo: boolean = false) => {
     if (!url) return url
 
-    let fixedUrl = url.replace('http://', 'https://').replace(/\/150($|\?)/, '/0$1')
+    let fixedUrl = url.replace('http://', 'https://')
+
+    // 只有非视频（即图片）才需要处理 /150 变 /0
+    if (!isVideo) {
+        fixedUrl = fixedUrl.replace(/\/150($|\?)/, '/0$1')
+    }
+
     if (!token || fixedUrl.includes('token=')) return fixedUrl
 
+    // 根据用户要求，视频链接组合方式为: BASE_URL + "?" + "token=" + token + "&idx=1" + 原有参数
+    if (isVideo) {
+        const urlParts = fixedUrl.split('?')
+        const baseUrl = urlParts[0]
+        const existingParams = urlParts[1] ? `&${urlParts[1]}` : ''
+        return `${baseUrl}?token=${token}&idx=1${existingParams}`
+    }
+
     const connector = fixedUrl.includes('?') ? '&' : '?'
     return `${fixedUrl}${connector}token=${token}&idx=1`
 }
 
 const detectImageMime = (buf: Buffer, fallback: string = 'image/jpeg') => {
     if (!buf || buf.length < 4) return fallback
+
+    // JPEG
     if (buf[0] === 0xff && buf[1] === 0xd8 && buf[2] === 0xff) return 'image/jpeg'
 
+    // PNG
     if (
         buf.length >= 8 &&
         buf[0] === 0x89 && buf[1] === 0x50 && buf[2] === 0x4e && buf[3] === 0x47 &&
         buf[4] === 0x0d && buf[5] === 0x0a && buf[6] === 0x1a && buf[7] === 0x0a
     ) return 'image/png'
 
+    // GIF
     if (buf.length >= 6) {
         const sig = buf.subarray(0, 6).toString('ascii')
         if (sig === 'GIF87a' || sig === 'GIF89a') return 'image/gif'
     }
 
+    // WebP
     if (
         buf.length >= 12 &&
         buf[0] === 0x52 && buf[1] === 0x49 && buf[2] === 0x46 && buf[3] === 0x46 &&
         buf[8] === 0x57 && buf[9] === 0x45 && buf[10] === 0x42 && buf[11] === 0x50
     ) return 'image/webp'
 
+    // BMP
     if (buf[0] === 0x42 && buf[1] === 0x4d) return 'image/bmp'
+
+    // MP4: 00 00 00 18 / 20 / ... + 'ftyp'
+    if (buf.length > 8 && buf[4] === 0x66 && buf[5] === 0x74 && buf[6] === 0x79 && buf[7] === 0x70) return 'video/mp4'
+
+    // Fallback logic for video
+    if (fallback.includes('video') || fallback.includes('mp4')) return 'video/mp4'
+
     return fallback
 }
 
+export const isVideoUrl = (url: string) => {
+    if (!url) return false
+    // 排除 vweixinthumb 域名 (缩略图)
+    if (url.includes('vweixinthumb')) return false
+    return url.includes('snsvideodownload') || url.includes('video') || url.includes('.mp4')
+}
+
+import { Isaac64 } from './isaac64'
+
+const extractVideoKey = (xml: string): string | undefined => {
+    if (!xml) return undefined
+    // 匹配 <enc key="2105122989" ... /> 或 <enc key="2105122989">
+    const match = xml.match(/<enc\s+key="(\d+)"/i)
+    return match ? match[1] : undefined
+}
+
 class SnsService {
     private configService: ConfigService
     private contactCache: ContactCacheService
     private imageCache = new Map<string, string>()
 
-    private nativeDecryptInit = false
-    private nativeDecryptReady = false
-    private nativeDecryptError = ''
-    private nativeDecryptDllPath = ''
-    private nativeKoffi: any = null
-    private nativeWeixinLib: any = null
-    private nativeDecryptFn: any = null
-
     constructor() {
         this.configService = new ConfigService()
         this.contactCache = new ContactCacheService(this.configService.get('cachePath') as string)
     }
 
+    private getSnsCacheDir(): string {
+        const cachePath = this.configService.getCacheBasePath()
+        const snsCacheDir = join(cachePath, 'sns_cache')
+        if (!existsSync(snsCacheDir)) {
+            mkdirSync(snsCacheDir, { recursive: true })
+        }
+        return snsCacheDir
+    }
+
+    private getCacheFilePath(url: string): string {
+        const hash = crypto.createHash('md5').update(url).digest('hex')
+        const ext = isVideoUrl(url) ? '.mp4' : '.jpg'
+        return join(this.getSnsCacheDir(), `${hash}${ext}`)
+    }
+
     async getTimeline(limit: number = 20, offset: number = 0, usernames?: string[], keyword?: string, startTime?: number, endTime?: number): Promise<{ success: boolean; timeline?: SnsPost[]; error?: string }> {
         const result = await wcdbService.getSnsTimeline(limit, offset, usernames, keyword, startTime, endTime)
 
         if (result.success && result.timeline) {
             const enrichedTimeline = result.timeline.map((post: any) => {
                 const contact = this.contactCache.get(post.username)
+                const isVideoPost = post.type === 15
+
+                // 尝试从 rawXml 中提取视频解密密钥 (针对视频号视频)
+                const videoKey = extractVideoKey(post.rawXml || '')
+
                 const fixedMedia = (post.media || []).map((m: any) => ({
-                    url: fixSnsUrl(m.url, m.token),
-                    thumb: fixSnsUrl(m.thumb, m.token),
+                    // 如果是视频动态，url 是视频，thumb 是缩略图
+                    url: fixSnsUrl(m.url, m.token, isVideoPost),
+                    thumb: fixSnsUrl(m.thumb, m.token, false),
                     md5: m.md5,
                     token: m.token,
-                    key: m.key,
+                    // 只有在视频动态 (Type 15) 下才尝试将 XML 提取的 videoKey 赋予主媒体
+                    // 对于图片或实况照片的静态部分，应保留原始 m.key (由 DLL/DB 提供)，避免由于错误的 Isaac64 密钥导致图片解密损坏
+                    key: isVideoPost ? (videoKey || m.key) : m.key,
                     encIdx: m.encIdx || m.enc_idx,
                     livePhoto: m.livePhoto
                         ? {
                             ...m.livePhoto,
-                            url: fixSnsUrl(m.livePhoto.url, m.livePhoto.token),
-                            thumb: fixSnsUrl(m.livePhoto.thumb, m.livePhoto.token),
+                            url: fixSnsUrl(m.livePhoto.url, m.livePhoto.token, true),
+                            thumb: fixSnsUrl(m.livePhoto.thumb, m.livePhoto.token, false),
                             token: m.livePhoto.token,
-                            key: m.livePhoto.key,
+                            // 实况照片的视频部分优先使用从 XML 提取的 Key
+                            key: videoKey || m.livePhoto.key || m.key,
                             encIdx: m.livePhoto.encIdx || m.livePhoto.enc_idx
                         }
                         : undefined
@@ -172,126 +234,9 @@ class SnsService {
         })
     }
 
-    private parseSnsKey(key?: string | number): bigint | null {
-        if (key === undefined || key === null) return null
-        if (typeof key === 'number') return BigInt(Math.trunc(key))
-        const raw = String(key).trim()
-        if (!raw) return null
-        try {
-            return BigInt(raw)
-        } catch {
-            return null
-        }
-    }
-    private resolveWeixinDllPath(): string | null {
-        const candidates: string[] = []
 
-        if (process.env.WEFLOW_WEIXIN_DLL) candidates.push(process.env.WEFLOW_WEIXIN_DLL)
 
-        const configuredPath = String(this.configService.get('weixinDllPath') || '').trim()
-        if (configuredPath) candidates.push(configuredPath)
-
-        const weixinExe = process.env.WEFLOW_WEIXIN_EXE
-        if (weixinExe) {
-            const dir = weixinExe.replace(/\\Weixin\.exe$/i, '')
-            if (dir && dir !== weixinExe) candidates.push(join(dir, 'Weixin.dll'))
-        }
-
-        const programFiles = process.env.ProgramFiles || 'C:\\Program Files'
-        const localAppData = process.env.LOCALAPPDATA || ''
-        candidates.push(join(programFiles, 'Tencent', 'Weixin', 'Weixin.dll'))
-        if (localAppData) candidates.push(join(localAppData, 'Tencent', 'xwechat', 'Weixin.dll'))
-
-        const seen = new Set<string>()
-        for (const p of candidates) {
-            if (!p) continue
-            const normalized = p.trim()
-            if (!normalized || seen.has(normalized)) continue
-            seen.add(normalized)
-            if (existsSync(normalized)) return normalized
-        }
-        return null
-    }
-    private ensureNativeDecryptor(): boolean {
-        const configuredPath = String(this.configService.get('weixinDllPath') || '').trim()
-        if (this.nativeDecryptInit && !this.nativeDecryptReady && configuredPath && configuredPath !== this.nativeDecryptDllPath) {
-            this.nativeDecryptInit = false
-        }
-
-        if (this.nativeDecryptInit) return this.nativeDecryptReady
-        this.nativeDecryptInit = true
-
-        try {
-            const dllPath = this.resolveWeixinDllPath()
-            if (!dllPath) {
-                this.nativeDecryptError = 'Weixin.dll not found, please set it in Settings or WEFLOW_WEIXIN_DLL'
-                return false
-            }
-
-            const koffi = require('koffi')
-            const kernel32 = koffi.load('kernel32.dll')
-            const getModuleHandleW = kernel32.func('void* __stdcall GetModuleHandleW(str16 lpModuleName)')
-
-            const weixinLib = koffi.load(dllPath)
-
-            let modulePtr = getModuleHandleW('Weixin.dll')
-            if (!modulePtr) modulePtr = getModuleHandleW(basename(dllPath))
-            if (!modulePtr) {
-                this.nativeDecryptError = `GetModuleHandleW 失败: ${dllPath}`
-                return false
-            }
-
-            const base = koffi.address(modulePtr) as bigint
-            const decryptAddr = base + WEIXIN_DLL_OFFSET
-
-            // Koffi requires an external pointer object (not raw Number/BigInt).
-            // Build a temporary uint64 box, decode it to void*, then decode function pointer.
-            const addrBox = new BigUint64Array(1)
-            addrBox[0] = decryptAddr
-            const decryptPtr = koffi.decode(addrBox, 'void *')
-            if (!decryptPtr) {
-                this.nativeDecryptError = `Decode function pointer failed: ${decryptAddr.toString(16)}`
-                return false
-            }
-
-            const decryptProto = koffi.proto('uint64 __fastcall SnsImageDecrypt(void* src, uint64 len, void* dst, uint64 key)')
-            this.nativeDecryptFn = koffi.decode(decryptPtr, decryptProto)
-            this.nativeKoffi = koffi
-            this.nativeWeixinLib = weixinLib
-            this.nativeDecryptReady = true
-            this.nativeDecryptDllPath = dllPath
-            console.info('[SNS] Native decrypt enabled:', this.nativeDecryptDllPath)
-            return true
-        } catch (e: any) {
-            this.nativeDecryptError = e?.message || String(e)
-            this.nativeDecryptReady = false
-            console.warn('[SNS] Native decrypt init failed:', this.nativeDecryptError)
-            return false
-        }
-    }
-
-    private decryptSnsEncryptedImage(data: Buffer, key: string | number): Buffer {
-        const parsedKey = this.parseSnsKey(key)
-        if (!parsedKey) return data
-        if (!this.ensureNativeDecryptor()) return data
-
-        const out = Buffer.allocUnsafe(data.length)
-        try {
-            this.nativeDecryptFn(
-                data,
-                BigInt(data.length),
-                out,
-                parsedKey
-            )
-            return out
-        } catch (e: any) {
-            this.nativeDecryptError = e?.message || String(e)
-            console.warn('[SNS] Native decrypt call failed:', this.nativeDecryptError)
-            return data
-        }
-    }
-
-    async proxyImage(url: string, key?: string | number): Promise<{ success: boolean; dataUrl?: string; error?: string }> {
+    async proxyImage(url: string, key?: string | number): Promise<{ success: boolean; dataUrl?: string; videoPath?: string; error?: string }> {
         if (!url) return { success: false, error: 'url 不能为空' }
         const cacheKey = `${url}|${key ?? ''}`
 
@@ -299,6 +244,153 @@ class SnsService {
             return { success: true, dataUrl: this.imageCache.get(cacheKey) }
         }
 
+        const result = await this.fetchAndDecryptImage(url, key)
+        if (result.success) {
+            // 如果是视频，返回本地文件路径 (需配合 webSecurity: false 或自定义协议)
+            if (result.contentType?.startsWith('video/')) {
+                // Return cachePath directly for video
+                // 注意：fetchAndDecryptImage 需要修改以返回 cachePath
+                return { success: true, videoPath: result.cachePath }
+            }
+
+            if (result.data && result.contentType) {
+                const dataUrl = `data:${result.contentType};base64,${result.data.toString('base64')}`
+                this.imageCache.set(cacheKey, dataUrl)
+                return { success: true, dataUrl }
+            }
+        }
+        return { success: false, error: result.error }
+    }
+
+    async downloadImage(url: string, key?: string | number): Promise<{ success: boolean; data?: Buffer; contentType?: string; error?: string }> {
+        return this.fetchAndDecryptImage(url, key)
+    }
+
+    private async fetchAndDecryptImage(url: string, key?: string | number): Promise<{ success: boolean; data?: Buffer; contentType?: string; cachePath?: string; error?: string }> {
+        if (!url) return { success: false, error: 'url 不能为空' }
+
+        const isVideo = isVideoUrl(url)
+        const cachePath = this.getCacheFilePath(url)
+
+        // 1. 尝试从磁盘缓存读取
+        if (existsSync(cachePath)) {
+            try {
+                // 对于视频，不读取整个文件到内存，只确认存在即可
+                if (isVideo) {
+                    return { success: true, cachePath, contentType: 'video/mp4' }
+                }
+
+                const data = await readFile(cachePath)
+                const contentType = detectImageMime(data)
+                return { success: true, data, contentType, cachePath }
+            } catch (e) {
+                console.warn(`[SnsService] 读取缓存失败: ${cachePath}`, e)
+            }
+        }
+
+        if (isVideo) {
+            // 视频专用下载逻辑 (下载 -> 解密 -> 缓存)
+            return new Promise(async (resolve) => {
+                const tmpPath = join(require('os').tmpdir(), `sns_video_${Date.now()}_${Math.random().toString(36).slice(2)}.enc`)
+                console.log(`[SnsService] 开始下载视频到临时文件: ${tmpPath}`)
+
+                try {
+                    const https = require('https')
+                    const urlObj = new URL(url)
+                    const fs = require('fs')
+
+                    const fileStream = fs.createWriteStream(tmpPath)
+
+                    const options = {
+                        hostname: urlObj.hostname,
+                        path: urlObj.pathname + urlObj.search,
+                        method: 'GET',
+                        headers: {
+                            'User-Agent': 'MicroMessenger Client',
+                            'Accept': '*/*',
+                            // 'Accept-Encoding': 'gzip, deflate, br', // 视频流通常不压缩，去掉以免 stream 处理复杂
+                            'Connection': 'keep-alive'
+                        }
+                    }
+
+                    const req = https.request(options, (res: any) => {
+                        if (res.statusCode !== 200 && res.statusCode !== 206) {
+                            fileStream.close()
+                            fs.unlink(tmpPath, () => { }) // 删除临时文件
+                            resolve({ success: false, error: `HTTP ${res.statusCode}` })
+                            return
+                        }
+
+                        res.pipe(fileStream)
+
+                        fileStream.on('finish', async () => {
+                            fileStream.close()
+                            console.log(`[SnsService] 视频下载完成，开始解密... Key: ${key}`)
+
+                            try {
+                                const encryptedBuffer = await readFile(tmpPath)
+                                const raw = encryptedBuffer // 引用，方便后续操作
+
+
+                                if (key && String(key).trim().length > 0) {
+                                    try {
+                                        console.log(`[SnsService] 使用 WASM Isaac64 解密视频... Key: ${key}`)
+                                        const wasmService = WasmService.getInstance()
+                                        // 只需要前 128KB (131072 bytes) 用于解密头部
+                                        const keystream = await wasmService.getKeystream(String(key), 131072)
+
+                                        const decryptLen = Math.min(keystream.length, raw.length)
+
+                                        // XOR 解密
+                                        for (let i = 0; i < decryptLen; i++) {
+                                            raw[i] ^= keystream[i]
+                                        }
+
+                                        // 验证 MP4 签名 ('ftyp' at offset 4)
+                                        const ftyp = raw.subarray(4, 8).toString('ascii')
+                                        if (ftyp === 'ftyp') {
+                                            console.log(`[SnsService] 视频解密成功: ${url}`)
+                                        } else {
+                                            console.warn(`[SnsService] 视频解密可能失败: ${url}, 未找到 ftyp 签名: ${ftyp}`)
+                                            // 打印前 32 字节用于调试
+                                            console.warn(`[SnsService] Decrypted Header (first 32 bytes): ${raw.subarray(0, 32).toString('hex')}`)
+                                        }
+                                    } catch (err) {
+                                        console.error(`[SnsService] 视频解密出错: ${err}`)
+                                    }
+                                } else {
+                                    console.warn(`[SnsService] 未提供 Key，跳过解密，直接保存`)
+                                }
+
+                                // 写入最终缓存 (覆盖)
+                                await writeFile(cachePath, raw)
+                                console.log(`[SnsService] 视频已保存到缓存: ${cachePath}`)
+
+                                // 删除临时文件
+                                try { await import('fs/promises').then(fs => fs.unlink(tmpPath)) } catch (e) { }
+
+                                resolve({ success: true, data: raw, contentType: 'video/mp4', cachePath })
+                            } catch (e: any) {
+                                console.error(`[SnsService] 视频处理失败:`, e)
+                                resolve({ success: false, error: e.message })
+                            }
+                        })
+                    })
+
+                    req.on('error', (e: any) => {
+                        fs.unlink(tmpPath, () => { })
+                        resolve({ success: false, error: e.message })
+                    })
+
+                    req.end()
+
+                } catch (e: any) {
+                    resolve({ success: false, error: e.message })
+                }
+            })
+        }
+
+        // 图片逻辑 (保持流式处理)
         return new Promise((resolve) => {
             try {
                 const https = require('https')
@@ -310,8 +402,8 @@ class SnsService {
                     path: urlObj.pathname + urlObj.search,
                     method: 'GET',
                     headers: {
-                        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.36 MicroMessenger/7.0.20.1781(0x6700143B) WindowsWechat(0x63090719) XWEB/8351',
-                        'Accept': 'image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8',
+                        'User-Agent': 'MicroMessenger Client',
+                        'Accept': '*/*',
                         'Accept-Encoding': 'gzip, deflate, br',
                         'Accept-Language': 'zh-CN,zh;q=0.9',
                         'Connection': 'keep-alive'
@@ -319,7 +411,7 @@ class SnsService {
                 }
 
                 const req = https.request(options, (res: any) => {
-                    if (res.statusCode !== 200) {
+                    if (res.statusCode !== 200 && res.statusCode !== 206) {
                         resolve({ success: false, error: `HTTP ${res.statusCode}` })
                         return
                     }
@@ -333,17 +425,28 @@ class SnsService {
                     else if (encoding === 'br') stream = res.pipe(zlib.createBrotliDecompress())
 
                     stream.on('data', (chunk: Buffer) => chunks.push(chunk))
-                    stream.on('end', () => {
+                    stream.on('end', async () => {
                         const raw = Buffer.concat(chunks)
                         const xEnc = String(res.headers['x-enc'] || '').trim()
-                        const shouldDecrypt = xEnc === '1' && key !== undefined && key !== null && String(key).trim().length > 0
-                        const decoded = shouldDecrypt ? this.decryptSnsEncryptedImage(raw, key as string | number) : raw
+
+                        let decoded = raw
+
+                        // 图片逻辑
+                        const shouldDecrypt = (xEnc === '1' || !!key) && key !== undefined && key !== null && String(key).trim().length > 0
+                        if (shouldDecrypt) {
+                            const decrypted = await wcdbService.decryptSnsImage(raw, String(key))
+                            decoded = Buffer.from(decrypted)
+                        }
+
+                        // 写入磁盘缓存
+                        try {
+                            await writeFile(cachePath, decoded)
+                        } catch (e) {
+                            console.warn(`[SnsService] 写入缓存失败: ${cachePath}`, e)
+                        }
 
                         const contentType = detectImageMime(decoded, (res.headers['content-type'] || 'image/jpeg') as string)
-                        const dataUrl = `data:${contentType};base64,${decoded.toString('base64')}`
-
-                        this.imageCache.set(cacheKey, dataUrl)
-                        resolve({ success: true, dataUrl })
+                        resolve({ success: true, data: decoded, contentType, cachePath })
                     })
                     stream.on('error', (e: any) => resolve({ success: false, error: e.message }))
                 })
diff --git a/electron/services/videoService.ts b/electron/services/videoService.ts
index a24c02c..6b44c2e 100644
--- a/electron/services/videoService.ts
+++ b/electron/services/videoService.ts
@@ -36,7 +36,7 @@ class VideoService {
      * 获取缓存目录（解密后的数据库存放位置）
      */
     private getCachePath(): string {
-        return this.configService.get('cachePath') || ''
+        return this.configService.getCacheBasePath()
     }
 
     /**
@@ -110,7 +110,7 @@ class VideoService {
             const wxidLower = wxid.toLowerCase()
             const cleanedWxidLower = cleanedWxid.toLowerCase()
             const dbPathContainsWxid = dbPathLower.includes(wxidLower) || dbPathLower.includes(cleanedWxidLower)
-            
+
             const encryptedDbPaths: string[] = []
             if (dbPathContainsWxid) {
                 // dbPath 已包含 wxid，不需要再拼接
@@ -120,15 +120,15 @@ class VideoService {
                 encryptedDbPaths.push(join(dbPath, wxid, 'db_storage', 'hardlink', 'hardlink.db'))
                 encryptedDbPaths.push(join(dbPath, cleanedWxid, 'db_storage', 'hardlink', 'hardlink.db'))
             }
-            
+
             for (const p of encryptedDbPaths) {
                 if (existsSync(p)) {
                     try {
                         const escapedMd5 = md5.replace(/'/g, "''")
-                        
+
                         // 用 md5 字段查询，获取 file_name
                         const sql = `SELECT file_name FROM video_hardlink_info_v4 WHERE md5 = '${escapedMd5}' LIMIT 1`
-                        
+
                         const result = await wcdbService.execQuery('media', p, sql)
 
                         if (result.success && result.rows && result.rows.length > 0) {
@@ -181,7 +181,7 @@ class VideoService {
         const dbPathLower = dbPath.toLowerCase()
         const wxidLower = wxid.toLowerCase()
         const cleanedWxid = this.cleanWxid(wxid)
-        
+
         let videoBaseDir: string
         if (dbPathLower.includes(wxidLower) || dbPathLower.includes(cleanedWxid.toLowerCase())) {
             // dbPath 已经包含 wxid，直接使用
@@ -235,7 +235,7 @@ class VideoService {
      * 根据消息内容解析视频MD5
      */
     parseVideoMd5(content: string): string | undefined {
-        
+
         // 打印前500字符看看 XML 结构
 
         if (!content) return undefined
@@ -252,7 +252,7 @@ class VideoService {
             // 提取 md5（用于查询 hardlink.db）
             // 注意：不是 rawmd5，rawmd5 是另一个值
             // 格式: md5="xxx" 或 <md5>xxx</md5>
-            
+
             // 尝试从videomsg标签中提取md5
             const videoMsgMatch = /<videomsg[^>]*\smd5\s*=\s*['"]([a-fA-F0-9]+)['"]/i.exec(content)
             if (videoMsgMatch) {
diff --git a/electron/services/wasmService.ts b/electron/services/wasmService.ts
new file mode 100644
index 0000000..79575d9
--- /dev/null
+++ b/electron/services/wasmService.ts
@@ -0,0 +1,175 @@
+
+import path from 'path';
+import fs from 'fs';
+import vm from 'vm';
+
+let app: any;
+try {
+    // eslint-disable-next-line @typescript-eslint/no-var-requires
+    app = require('electron').app;
+} catch (e) {
+    app = { isPackaged: false };
+}
+
+// This service handles the loading and execution of the WeChat WASM module
+// to generate the correct Isaac64 keystream for video decryption.
+export class WasmService {
+    private static instance: WasmService;
+    private module: any = null;
+    private wasmLoaded = false;
+    private initPromise: Promise<void> | null = null;
+    private capturedKeystream: Uint8Array | null = null;
+
+    private constructor() { }
+
+    public static getInstance(): WasmService {
+        if (!WasmService.instance) {
+            WasmService.instance = new WasmService();
+        }
+        return WasmService.instance;
+    }
+
+    private async init(): Promise<void> {
+        if (this.wasmLoaded) return;
+        if (this.initPromise) return this.initPromise;
+
+        this.initPromise = new Promise((resolve, reject) => {
+            try {
+                // For dev, files are in electron/assets/wasm
+                // __dirname in dev (from dist-electron) is .../dist-electron
+                // So we need to go up one level and then into electron/assets/wasm
+                const isDev = !app.isPackaged;
+                const basePath = isDev
+                    ? path.join(__dirname, '../electron/assets/wasm')
+                    : path.join(process.resourcesPath, 'assets/wasm'); // Adjust as needed for production build
+
+                const wasmPath = path.join(basePath, 'wasm_video_decode.wasm');
+                const jsPath = path.join(basePath, 'wasm_video_decode.js');
+
+                console.log('[WasmService] Loading WASM from:', wasmPath);
+
+                if (!fs.existsSync(wasmPath) || !fs.existsSync(jsPath)) {
+                    throw new Error(`WASM files not found at ${basePath}`);
+                }
+
+                const wasmBinary = fs.readFileSync(wasmPath);
+
+                // Emulate Emscripten environment
+                // We must use 'any' for global mocking
+                const mockGlobal: any = {
+                    console: console,
+                    Buffer: Buffer,
+                    Uint8Array: Uint8Array,
+                    Int8Array: Int8Array,
+                    Uint16Array: Uint16Array,
+                    Int16Array: Int16Array,
+                    Uint32Array: Uint32Array,
+                    Int32Array: Int32Array,
+                    Float32Array: Float32Array,
+                    Float64Array: Float64Array,
+                    BigInt64Array: BigInt64Array,
+                    BigUint64Array: BigUint64Array,
+                    Array: Array,
+                    Object: Object,
+                    Function: Function,
+                    String: String,
+                    Number: Number,
+                    Boolean: Boolean,
+                    Error: Error,
+                    Promise: Promise,
+                    require: require,
+                    process: process,
+                    setTimeout: setTimeout,
+                    clearTimeout: clearTimeout,
+                    setInterval: setInterval,
+                    clearInterval: clearInterval,
+                };
+
+                // Define Module
+                mockGlobal.Module = {
+                    onRuntimeInitialized: () => {
+                        console.log("[WasmService] WASM Runtime Initialized");
+                        this.wasmLoaded = true;
+                        resolve();
+                    },
+                    wasmBinary: wasmBinary,
+                    print: (text: string) => console.log('[WASM stdout]', text),
+                    printErr: (text: string) => console.error('[WASM stderr]', text)
+                };
+
+                // Define necessary globals for Emscripten loader
+                mockGlobal.self = mockGlobal;
+                mockGlobal.self.location = { href: jsPath };
+                mockGlobal.WorkerGlobalScope = function () { };
+                mockGlobal.VTS_WASM_URL = `file://${wasmPath}`; // Needs a URL, file protocol works in Node context for our mock?
+
+                // Define the callback function that WASM calls to return data
+                // The WASM module calls `wasm_isaac_generate(ptr, size)`
+                mockGlobal.wasm_isaac_generate = (ptr: number, size: number) => {
+                    // console.log(`[WasmService] wasm_isaac_generate called: ptr=${ptr}, size=${size}`);
+                    const buffer = new Uint8Array(mockGlobal.Module.HEAPU8.buffer, ptr, size);
+                    // Copy the data because WASM memory might change or be invalidated
+                    this.capturedKeystream = new Uint8Array(buffer);
+                };
+
+                // Execute the loader script in the context
+                const jsContent = fs.readFileSync(jsPath, 'utf8');
+                const script = new vm.Script(jsContent, { filename: jsPath });
+
+                // create context
+                const context = vm.createContext(mockGlobal);
+                script.runInContext(context);
+
+                // Store reference to module
+                this.module = mockGlobal.Module;
+
+            } catch (error) {
+                console.error('[WasmService] Failed to initialize WASM:', error);
+                reject(error);
+            }
+        });
+
+        return this.initPromise;
+    }
+
+    public async getKeystream(key: string, size: number = 131072): Promise<Buffer> {
+        await this.init();
+
+        if (!this.module || !this.module.WxIsaac64) {
+            // Fallback check for asm.WxIsaac64 logic if needed, but debug showed it on Module
+            if (this.module.asm && this.module.asm.WxIsaac64) {
+                this.module.WxIsaac64 = this.module.asm.WxIsaac64;
+            }
+        }
+
+        if (!this.module.WxIsaac64) {
+            throw new Error('[WasmService] WxIsaac64 not found in WASM module');
+        }
+
+        try {
+            this.capturedKeystream = null;
+            const isaac = new this.module.WxIsaac64(key);
+            isaac.generate(size); // This triggers the global.wasm_isaac_generate callback
+
+            // Cleanup if possible? isaac.delete()? 
+            // In worker code: p.decryptor.delete()
+            if (isaac.delete) {
+                isaac.delete();
+            }
+
+            if (this.capturedKeystream) {
+                // The worker_release.js logic does: 
+                // p.decryptor_array.set(r.reverse())
+                // So the actual keystream is the REVERSE of what is passed to the callback.
+                const reversed = new Uint8Array(this.capturedKeystream);
+                reversed.reverse();
+                return Buffer.from(reversed);
+            } else {
+                throw new Error('[WasmService] Failed to capture keystream (callback not called)');
+            }
+        } catch (error) {
+            console.error('[WasmService] Error generating keystream:', error);
+            throw error;
+        }
+    }
+}
diff --git a/electron/services/wcdbCore.ts b/electron/services/wcdbCore.ts
index 9bc6b39..ca08869 100644
--- a/electron/services/wcdbCore.ts
+++ b/electron/services/wcdbCore.ts
@@ -64,7 +64,9 @@ export class WcdbCore {
   private wcdbVerifyUser: any = null
   private wcdbStartMonitorPipe: any = null
   private wcdbStopMonitorPipe: any = null
+
   private monitorPipeClient: any = null
+  private wcdbDecryptSnsImage: any = null
 
   private avatarUrlCache: Map<string, { url?: string; updatedAt: number }> = new Map()
   private readonly avatarCacheTtlMs = 10 * 60 * 1000
@@ -137,11 +139,48 @@ export class WcdbCore {
       this.writeLog('Monitor started via named pipe IPC')
       return true
     } catch (e) {
-      console.error('startMonitor failed:', e)
+      console.error('打开数据库异常:', e)
       return false
     }
   }
 
+  /**
+   * 解密朋友圈图片
+   */
+  async decryptSnsImage(encryptedData: Buffer, key: string): Promise<Buffer> {
+    if (!this.initialized) {
+      const initOk = await this.initialize()
+      if (!initOk) return encryptedData
+    }
+
+    if (!this.wcdbDecryptSnsImage) return encryptedData
+
+    try {
+      if (!this.wcdbDecryptSnsImage) {
+        console.error('[WCDB] wcdbDecryptSnsImage func is null')
+        return encryptedData
+      }
+
+      const outPtr = [null as any]
+      // Koffi pass Buffer as char* pointer
+      const result = this.wcdbDecryptSnsImage(encryptedData, encryptedData.length, key, outPtr)
+
+      if (result === 0 && outPtr[0]) {
+        const hex = this.decodeJsonPtr(outPtr[0])
+        if (hex) {
+          return Buffer.from(hex, 'hex')
+        }
+      } else {
+        console.error(`[WCDB] Decrypt SNS image failed with code: ${result}`)
+        // 主动获取 DLL 内部日志以诊断问题
+        await this.printLogs(true)
+      }
+    } catch (e) {
+      console.error('解密图片失败:', e)
+    }
+    return encryptedData
+  }
+
   stopMonitor(): void {
     if (this.monitorPipeClient) {
       this.monitorPipeClient.destroy()
@@ -563,6 +602,13 @@ export class WcdbCore {
         this.wcdbVerifyUser = null
       }
 
+      // wcdb_status wcdb_decrypt_sns_image(const char* encrypted_data, int32_t data_len, const char* key, char** out_hex)
+      try {
+        this.wcdbDecryptSnsImage = this.lib.func('int32 wcdb_decrypt_sns_image(const char* data, int32 len, const char* key, _Out_ void** outHex)')
+      } catch {
+        this.wcdbDecryptSnsImage = null
+      }
+
       // 初始化
       const initResult = this.wcdbInit()
       if (initResult !== 0) {
diff --git a/electron/services/wcdbService.ts b/electron/services/wcdbService.ts
index aef9bda..e0464fc 100644
--- a/electron/services/wcdbService.ts
+++ b/electron/services/wcdbService.ts
@@ -431,6 +431,13 @@ export class WcdbService {
     return this.callWorker('verifyUser', { message, hwnd })
   }
 
+  /**
+   * 解密朋友圈图片
+   */
+  async decryptSnsImage(encryptedData: Buffer, key: string): Promise<Buffer> {
+    return this.callWorker<Buffer>('decryptSnsImage', { encryptedData, key })
+  }
+
 }
 
 export const wcdbService = new WcdbService()
diff --git a/electron/wcdbWorker.ts b/electron/wcdbWorker.ts
index 4361f8b..9c7c771 100644
--- a/electron/wcdbWorker.ts
+++ b/electron/wcdbWorker.ts
@@ -150,6 +150,9 @@ if (parentPort) {
                 case 'verifyUser':
                     result = await core.verifyUser(payload.message, payload.hwnd)
                     break
+                case 'decryptSnsImage':
+                    result = await core.decryptSnsImage(payload.encryptedData, payload.key)
+                    break
                 default:
                     result = { success: false, error: `Unknown method: ${type}` }
             }
diff --git a/electron/windows/notificationWindow.ts b/electron/windows/notificationWindow.ts
index 28e7ea0..ec58eac 100644
--- a/electron/windows/notificationWindow.ts
+++ b/electron/windows/notificationWindow.ts
@@ -76,12 +76,10 @@ export async function showNotification(data: any) {
         const isInList = filterList.includes(sessionId)
         if (filterMode === 'whitelist' && !isInList) {
             // 白名单模式：不在列表中则不显示
-            console.log('[NotificationWindow] Filtered by whitelist:', sessionId)
             return
         }
         if (filterMode === 'blacklist' && isInList) {
             // 黑名单模式：在列表中则不显示
-            console.log('[NotificationWindow] Filtered by blacklist:', sessionId)
             return
         }
     }
diff --git a/resources/wcdb_api.dll b/resources/wcdb_api.dll
index cdb8b0f..0ec075d 100644
Binary files a/resources/wcdb_api.dll and b/resources/wcdb_api.dll differ
diff --git a/src/components/ImagePreview.scss b/src/components/ImagePreview.scss
index 5e44b11..d065ebd 100644
--- a/src/components/ImagePreview.scss
+++ b/src/components/ImagePreview.scss
@@ -14,12 +14,21 @@
   max-height: 90vh;
   object-fit: contain;
   transition: transform 0.15s ease-out;
-  
+
   &.dragging {
     transition: none;
   }
 }
 
+.preview-content {
+  position: relative;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: fit-content;
+  height: fit-content;
+}
+
 .image-preview-close {
   position: absolute;
   bottom: 40px;
@@ -44,3 +53,38 @@
     transform: translateX(-50%) scale(1.1);
   }
 }
+
+.live-photo-btn {
+  position: absolute;
+  top: 15px;
+  right: 15px;
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  padding: 6px 12px;
+  border-radius: 16px;
+  background: rgba(0, 0, 0, 0.5);
+  color: #fff;
+  border: 1px solid rgba(255, 255, 255, 0.2);
+  cursor: pointer;
+  backdrop-filter: blur(10px);
+  transition: all 0.2s;
+  z-index: 10000;
+
+  &:hover {
+    background: rgba(255, 255, 255, 0.1);
+    border-color: rgba(255, 255, 255, 0.4);
+    transform: translateY(-2px);
+  }
+
+  &.active {
+    background: var(--accent-color, #007aff);
+    border-color: transparent;
+    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.3);
+  }
+
+  span {
+    font-size: 14px;
+    font-weight: 500;
+  }
+}
\ No newline at end of file
diff --git a/src/components/ImagePreview.tsx b/src/components/ImagePreview.tsx
index 28e06c9..9ad03ea 100644
--- a/src/components/ImagePreview.tsx
+++ b/src/components/ImagePreview.tsx
@@ -1,36 +1,41 @@
 import React, { useState, useRef, useCallback, useEffect } from 'react'
 import { X } from 'lucide-react'
+import { LivePhotoIcon } from './LivePhotoIcon'
 import { createPortal } from 'react-dom'
 import './ImagePreview.scss'
 
 interface ImagePreviewProps {
   src: string
+  isVideo?: boolean
+  liveVideoPath?: string
   onClose: () => void
 }
 
-export const ImagePreview: React.FC<ImagePreviewProps> = ({ src, onClose }) => {
+export const ImagePreview: React.FC<ImagePreviewProps> = ({ src, isVideo, liveVideoPath, onClose }) => {
   const [scale, setScale] = useState(1)
   const [position, setPosition] = useState({ x: 0, y: 0 })
   const [isDragging, setIsDragging] = useState(false)
+  const [showLive, setShowLive] = useState(false)
   const dragStart = useRef({ x: 0, y: 0 })
   const positionStart = useRef({ x: 0, y: 0 })
   const containerRef = useRef<HTMLDivElement>(null)
 
   // 滚轮缩放
   const handleWheel = useCallback((e: React.WheelEvent) => {
+    if (showLive) return // 播放实况时禁止缩放? 或者支持缩放? 暂定禁止以简化
     e.preventDefault()
     const delta = e.deltaY > 0 ? 0.9 : 1.1
     setScale(prev => Math.min(Math.max(prev * delta, 0.5), 5))
-  }, [])
+  }, [showLive])
 
   // 开始拖动
   const handleMouseDown = useCallback((e: React.MouseEvent) => {
-    if (scale <= 1) return
+    if (showLive || scale <= 1) return
     e.preventDefault()
     setIsDragging(true)
     dragStart.current = { x: e.clientX, y: e.clientY }
     positionStart.current = { ...position }
-  }, [scale, position])
+  }, [scale, position, showLive])
 
   // 拖动中
   const handleMouseMove = useCallback((e: React.MouseEvent) => {
@@ -79,19 +84,62 @@ export const ImagePreview: React.FC<ImagePreviewProps> = ({ src, onClose }) => {
       onMouseUp={handleMouseUp}
       onMouseLeave={handleMouseUp}
     >
-      <img
-        src={src}
-        alt="图片预览"
-        className={`preview-image ${isDragging ? 'dragging' : ''}`}
+      <div
+        className="preview-content"
         style={{
-          transform: `translate(${position.x}px, ${position.y}px) scale(${scale})`,
-          cursor: scale > 1 ? (isDragging ? 'grabbing' : 'grab') : 'default'
+          position: 'relative',
+          transform: `translate(${position.x}px, ${position.y}px)`,
+          width: 'fit-content',
+          height: 'fit-content'
         }}
-        onWheel={handleWheel}
-        onMouseDown={handleMouseDown}
-        onDoubleClick={handleDoubleClick}
-        draggable={false}
-      />
+        onClick={(e) => e.stopPropagation()}
+      >
+        {(isVideo || showLive) ? (
+          <video
+            src={showLive ? liveVideoPath : src}
+            controls={!showLive}
+            autoPlay
+            loop={showLive}
+            className="preview-image"
+            style={{
+              transform: `scale(${scale})`,
+              maxHeight: '90vh',
+              maxWidth: '90vw'
+            }}
+          />
+        ) : (
+          <img
+            src={src}
+            alt="图片预览"
+            className={`preview-image ${isDragging ? 'dragging' : ''}`}
+            style={{
+              transform: `scale(${scale})`,
+              maxHeight: '90vh',
+              maxWidth: '90vw',
+              cursor: scale > 1 ? (isDragging ? 'grabbing' : 'grab') : 'default'
+            }}
+            onWheel={handleWheel}
+            onMouseDown={handleMouseDown}
+            onDoubleClick={handleDoubleClick}
+            draggable={false}
+          />
+        )}
+
+        {liveVideoPath && !isVideo && (
+          <button
+            className={`live-photo-btn ${showLive ? 'active' : ''}`}
+            onClick={(e) => {
+              e.stopPropagation()
+              setShowLive(!showLive)
+            }}
+            title={showLive ? "显示照片" : "播放实况"}
+          >
+            <LivePhotoIcon size={20} />
+            <span>实况</span>
+          </button>
+        )}
+      </div>
+
       <button className="image-preview-close" onClick={onClose}>
         <X size={20} />
       </button>
diff --git a/src/pages/SnsPage.scss b/src/pages/SnsPage.scss
index 645cd44..a4d9e27 100644
--- a/src/pages/SnsPage.scss
+++ b/src/pages/SnsPage.scss
@@ -809,6 +809,60 @@
                             }
                         }
 
+
+
+                        .video-badge-container {
+                            position: absolute;
+                            top: 50%;
+                            left: 50%;
+                            transform: translate(-50%, -50%);
+                            z-index: 2;
+                            pointer-events: none;
+                            display: flex;
+                            align-items: center;
+                            justify-content: center;
+
+                            .video-badge {
+                                width: 44px;
+                                height: 44px;
+                                background: rgba(0, 0, 0, 0.3);
+                                backdrop-filter: blur(4px);
+                                border-radius: 50%;
+                                display: flex;
+                                align-items: center;
+                                justify-content: center;
+                                color: white;
+                                border: 1px solid rgba(255, 255, 255, 0.3);
+                                transition: all 0.2s;
+                                box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
+
+                                svg {
+                                    fill: white;
+                                    opacity: 0.9;
+                                }
+                            }
+
+                            .decrypting-badge {
+                                background: rgba(0, 0, 0, 0.6);
+                                backdrop-filter: blur(8px);
+                                padding: 8px 16px;
+                                border-radius: 20px;
+                                display: flex;
+                                align-items: center;
+                                gap: 8px;
+                                color: white;
+                                font-size: 13px;
+                                font-weight: 500;
+                                border: 1px solid rgba(255, 255, 255, 0.2);
+                                white-space: nowrap;
+                                box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
+
+                                .spin-icon {
+                                    animation: spin 1s linear infinite;
+                                }
+                            }
+                        }
+
                         &:hover {
                             .download-btn-overlay {
                                 opacity: 1;
@@ -1207,4 +1261,14 @@
             }
         }
     }
+
+    @keyframes spin {
+        from {
+            transform: rotate(0deg);
+        }
+
+        to {
+            transform: rotate(360deg);
+        }
+    }
 }
\ No newline at end of file
diff --git a/src/pages/SnsPage.tsx b/src/pages/SnsPage.tsx
index b925752..d0ab6ce 100644
--- a/src/pages/SnsPage.tsx
+++ b/src/pages/SnsPage.tsx
@@ -34,57 +34,218 @@ interface SnsPost {
     rawXml?: string  // 原始 XML 数据
 }
 
-const MediaItem = ({ media, onPreview }: { media: any; onPreview: (src: string) => void }) => {
+const MediaItem = ({ media, onPreview }: { media: any; onPreview: (src: string, isVideo?: boolean, liveVideoPath?: string) => void }) => {
     const [error, setError] = useState(false)
-    const [resolvedSrc, setResolvedSrc] = useState<string>('')
+    const [thumbSrc, setThumbSrc] = useState<string>('') // 缩略图
+    const [videoPath, setVideoPath] = useState<string>('') // 视频本地路径
+    const [liveVideoPath, setLiveVideoPath] = useState<string>('') // Live Photo 视频路径
+    const [isDecrypting, setIsDecrypting] = useState(false) // 解密状态
     const { url, thumb, livePhoto } = media
     const isLive = !!livePhoto
-    const targetUrl = thumb || url
+    const targetUrl = thumb || url // 默认显示缩略图
+
+    // 判断是否为视频
+    const isVideo = url && (url.includes('snsvideodownload') || url.includes('.mp4') || url.includes('video')) && !url.includes('vweixinthumb')
 
     useEffect(() => {
         let cancelled = false
         setError(false)
-        setResolvedSrc('')
+        setThumbSrc('')
+        setVideoPath('')
+        setLiveVideoPath('')
+        setIsDecrypting(false)
+
+        const extractFirstFrame = (videoUrl: string) => {
+            const video = document.createElement('video')
+            video.crossOrigin = 'anonymous'
+            video.style.display = 'none'
+            video.muted = true
+            video.src = videoUrl
+            video.currentTime = 0.1
+
+            const onLoadedData = () => {
+                if (cancelled) return cleanup()
+                try {
+                    const canvas = document.createElement('canvas')
+                    canvas.width = video.videoWidth
+                    canvas.height = video.videoHeight
+                    const ctx = canvas.getContext('2d')
+                    if (ctx) {
+                        ctx.drawImage(video, 0, 0, canvas.width, canvas.height)
+                        const dataUrl = canvas.toDataURL('image/jpeg', 0.8)
+                        if (!cancelled) {
+                            setThumbSrc(dataUrl)
+                            setIsDecrypting(false)
+                        }
+                    } else {
+                        if (!cancelled) setIsDecrypting(false)
+                    }
+                } catch (e) {
+                    console.warn('Frame extraction error', e)
+                    if (!cancelled) setIsDecrypting(false)
+                } finally {
+                    cleanup()
+                }
+            }
+
+            const onError = () => {
+                if (!cancelled) {
+                    setIsDecrypting(false)
+                    setThumbSrc(targetUrl) // Fallback
+                }
+                cleanup()
+            }
+
+            const cleanup = () => {
+                video.removeEventListener('seeked', onLoadedData)
+                video.removeEventListener('error', onError)
+                video.remove()
+            }
+
+            video.addEventListener('seeked', onLoadedData)
+            video.addEventListener('error', onError)
+            video.load()
+        }
 
         const run = async () => {
             try {
-                const result = await window.electronAPI.sns.proxyImage({
-                    url: targetUrl,
-                    key: media.key
-                })
-                if (cancelled) return
-                if (result.success && result.dataUrl) {
-                    setResolvedSrc(result.dataUrl)
+                if (isVideo) {
+                    setIsDecrypting(true)
+
+                    const videoResult = await window.electronAPI.sns.proxyImage({
+                        url: url,
+                        key: media.key
+                    })
+
+                    if (cancelled) return
+
+                    if (videoResult.success && videoResult.videoPath) {
+                        const localUrl = videoResult.videoPath.startsWith('file:')
+                            ? videoResult.videoPath
+                            : `file://${videoResult.videoPath.replace(/\\/g, '/')}`
+                        setVideoPath(localUrl)
+                        extractFirstFrame(localUrl)
+                    } else {
+                        console.warn('[MediaItem] Video decryption failed:', url, videoResult.error)
+                        setIsDecrypting(false)
+                        setError(true)
+                    }
                 } else {
-                    setResolvedSrc(targetUrl)
+                    const result = await window.electronAPI.sns.proxyImage({
+                        url: targetUrl,
+                        key: media.key
+                    })
+
+                    if (cancelled) return
+                    if (result.success) {
+                        if (result.dataUrl) {
+                            setThumbSrc(result.dataUrl)
+                        } else if (result.videoPath) {
+                            const localUrl = result.videoPath.startsWith('file:')
+                                ? result.videoPath
+                                : `file://${result.videoPath.replace(/\\/g, '/')}`
+                            setThumbSrc(localUrl)
+                        }
+                    } else {
+                        console.warn('[MediaItem] Image proxy failed:', targetUrl, result.error)
+                        setThumbSrc(targetUrl)
+                    }
+
+                    if (isLive && livePhoto && livePhoto.url) {
+                        window.electronAPI.sns.proxyImage({
+                            url: livePhoto.url,
+                            key: livePhoto.key || media.key
+                        }).then((res: any) => {
+                            if (cancelled) return
+                            if (res.success && res.videoPath) {
+                                const localUrl = res.videoPath.startsWith('file:')
+                                    ? res.videoPath
+                                    : `file://${res.videoPath.replace(/\\/g, '/')}`
+                                setLiveVideoPath(localUrl)
+                                console.log('[MediaItem] Live video ready:', localUrl)
+                            } else {
+                                console.warn('[MediaItem] Live video failed:', res.error)
+                            }
+                        }).catch((e: any) => console.error('[MediaItem] Live video err:', e))
+                    }
+                }
+            } catch (err) {
+                if (!cancelled) {
+                    console.error('[MediaItem] run error:', err)
+                    setError(true)
+                    setIsDecrypting(false)
                 }
-            } catch {
-                if (!cancelled) setResolvedSrc(targetUrl)
             }
         }
 
         run()
         return () => { cancelled = true }
-    }, [targetUrl, media.key])
+    }, [targetUrl, url, media.key, isVideo, isLive, livePhoto])
 
-    const handleDownload = (e: React.MouseEvent) => {
+    const handleDownload = async (e: React.MouseEvent) => {
         e.stopPropagation()
-        // TODO: call backend download service
+        try {
+            const result = await window.electronAPI.sns.downloadImage({
+                url: url || targetUrl, // Use original url if available
+                key: media.key
+            })
+            if (!result.success && result.error !== '用户已取消') {
+                alert(`下载失败: ${result.error}`)
+            }
+        } catch (error) {
+            console.error('Download failed:', error)
+            alert('下载过程中发生错误')
+        }
     }
 
-    const displaySrc = resolvedSrc || targetUrl
-    const previewSrc = resolvedSrc || url || targetUrl
+    // 点击时：如果是视频，应该传视频地址给 Preview？
+    // ImagePreview 目前可能只支持图片。需要检查 ImagePreview 是否支持视频。
+    // 假设 ImagePreview 暂不支持视频播放，我们可以在这里直接点开播放？
+    // 或者，传视频 URL 给 onPreview，让父组件决定/ImagePreview 决定。
+    // 通常做法：传给 ImagePreview，ImagePreview 识别 mp4 后播放。
+
+    // 显示用的图片：始终显示缩略图
+    const displaySrc = thumbSrc || targetUrl
+
+    // 预览用的地址：如果是视频，优先使用本地路径
+    const previewSrc = isVideo ? (videoPath || url) : (thumbSrc || url || targetUrl)
+
+    // 点击处理：解密中禁止点击
+    const handleClick = () => {
+        if (isVideo && isDecrypting) return
+        onPreview(previewSrc, isVideo, liveVideoPath)
+    }
 
     return (
-        <div className={`media-item ${error ? 'error' : ''}`} onClick={() => onPreview(previewSrc)}>
-            <img
-                src={displaySrc}
-                alt=""
-                referrerPolicy="no-referrer"
-                loading="lazy"
-                onError={() => setError(true)}
-            />
-            {isLive && (
+        <div className={`media-item ${error ? 'error' : ''} ${isVideo && isDecrypting ? 'decrypting' : ''}`} onClick={handleClick}>
+            {isVideo && isDecrypting ? (
+                <div className="video-loading-overlay" style={{
+                    position: 'absolute', inset: 0, display: 'flex', flexDirection: 'column',
+                    alignItems: 'center', justifyContent: 'center', background: 'rgba(0,0,0,0.5)', color: '#fff',
+                    zIndex: 2, backdropFilter: 'blur(4px)'
+                }}>
+                    <RefreshCw size={24} className="spin-icon" style={{ marginBottom: 8 }} />
+                    <span style={{ fontSize: 12 }}>解密中...</span>
+                </div>
+            ) : (
+                <img
+                    src={displaySrc}
+                    alt=""
+                    referrerPolicy="no-referrer"
+                    loading="lazy"
+                    onError={() => setError(true)}
+                />
+            )}
+
+            {isVideo && !isDecrypting && (
+                <div className="video-badge-container">
+                    <div className="video-badge">
+                        <Play size={16} className="play-icon" />
+                    </div>
+                </div>
+            )}
+
+            {isLive && !isVideo && (
                 <div className="live-badge">
                     <LivePhotoIcon size={16} className="live-icon" />
                 </div>
@@ -120,7 +281,7 @@ export default function SnsPage() {
     const [contactsLoading, setContactsLoading] = useState(false)
     const [showJumpDialog, setShowJumpDialog] = useState(false)
     const [jumpTargetDate, setJumpTargetDate] = useState<Date | undefined>(undefined)
-    const [previewImage, setPreviewImage] = useState<string | null>(null)
+    const [previewImage, setPreviewImage] = useState<{ src: string, isVideo?: boolean, liveVideoPath?: string } | null>(null)
     const [debugPost, setDebugPost] = useState<SnsPost | null>(null)
 
     const postsContainerRef = useRef<HTMLDivElement>(null)
@@ -169,7 +330,7 @@ export default function SnsPage() {
                 const currentPosts = postsRef.current
                 if (currentPosts.length > 0) {
                     const topTs = currentPosts[0].createTime
-                    
+
 
                     const result = await window.electronAPI.sns.getTimeline(
                         limit,
@@ -301,10 +462,10 @@ export default function SnsPage() {
         const checkSchema = async () => {
             try {
                 const schema = await window.electronAPI.chat.execQuery('sns', null, "PRAGMA table_info(SnsTimeLine)");
-                
+
                 if (schema.success && schema.rows) {
                     const columns = schema.rows.map((r: any) => r.name);
-                    
+
                 }
             } catch (e) {
                 console.error('[SnsPage] Failed to check schema:', e);
@@ -355,7 +516,7 @@ export default function SnsPage() {
 
         // deltaY < 0 表示向上滚，scrollTop === 0 表示已经在最顶端
         if (e.deltaY < -20 && container.scrollTop <= 0 && hasNewer && !loading && !loadingNewer) {
-            
+
             loadPosts({ direction: 'newer' })
         }
     }
@@ -432,10 +593,6 @@ export default function SnsPage() {
                     </div>
 
                     <div className="sns-content-wrapper">
-                        <div className="sns-notice-banner">
-                            <AlertTriangle size={16} />
-                            <span>由于技术限制，当前无法解密显示视频加密资源文件</span>
-                        </div>
                         <div className="sns-content custom-scrollbar" onScroll={handleScroll} onWheel={handleWheel} ref={postsContainerRef}>
                             <div className="posts-list">
                                 {loadingNewer && (
@@ -483,15 +640,10 @@ export default function SnsPage() {
                                                     <div className="post-body">
                                                         {post.contentDesc && <div className="post-text">{post.contentDesc}</div>}
 
-                                                        {post.type === 15 ? (
-                                                            <div className="post-video-placeholder">
-                                                                <Play size={20} />
-                                                                <span>视频动态</span>
-                                                            </div>
-                                                        ) : post.media.length > 0 && (
+                                                        {post.media.length > 0 && (
                                                             <div className={`post-media-grid media-count-${Math.min(post.media.length, 9)}`}>
                                                                 {post.media.map((m, idx) => (
-                                                                    <MediaItem key={idx} media={m} onPreview={(src) => setPreviewImage(src)} />
+                                                                    <MediaItem key={idx} media={m} onPreview={(src, isVideo, liveVideoPath) => setPreviewImage({ src, isVideo, liveVideoPath })} />
                                                                 ))}
                                                             </div>
                                                         )}
@@ -664,7 +816,12 @@ export default function SnsPage() {
                 </aside>
             </div>
             {previewImage && (
-                <ImagePreview src={previewImage} onClose={() => setPreviewImage(null)} />
+                <ImagePreview
+                    src={previewImage.src}
+                    isVideo={previewImage.isVideo}
+                    liveVideoPath={previewImage.liveVideoPath}
+                    onClose={() => setPreviewImage(null)}
+                />
             )}
             <JumpToDateDialog
                 isOpen={showJumpDialog}