增加百度语音识别

voice/baidu/baidu_voice.py

@@ -8,19 +8,53 @@ from bridge.reply import Reply, ReplyType
 from common.log import logger
 from common.tmp_dir import TmpDir
 from voice.voice import Voice
+from voice.audio_convert import get_pcm_from_wav
 from config import conf
+"""
+    百度的语音识别API.
+    dev_pid:
+        - 1936: 普通话远场
+        - 1536：普通话(支持简单的英文识别)
+        - 1537：普通话(纯中文识别)
+        - 1737：英语
+        - 1637：粤语
+        - 1837：四川话
+    要使用本模块, 首先到 yuyin.baidu.com 注册一个开发者账号,
+    之后创建一个新应用, 然后在应用管理的"查看key"中获得 API Key 和 Secret Key
+    填入 config.json 中.
+        baidu_app_id: ''
+        baidu_api_key: ''
+        baidu_secret_key: ''
+        baidu_dev_pid: '1536'
+"""
+
 
 class BaiduVoice(Voice):
     APP_ID = conf().get('baidu_app_id')
     API_KEY = conf().get('baidu_api_key')
     SECRET_KEY = conf().get('baidu_secret_key')
+    DEV_ID = conf().get('baidu_dev_pid')
     client = AipSpeech(APP_ID, API_KEY, SECRET_KEY)
-    
+
     def __init__(self):
         pass
 
     def voiceToText(self, voice_file):
-        pass
+        # 识别本地文件
+        logger.debug('[Baidu] voice file name={}'.format(voice_file))
+        pcm = get_pcm_from_wav(voice_file)
+        res = self.client.asr(pcm, "pcm", 16000, {"dev_pid": self.DEV_ID})
+        if res["err_no"] == 0:
+            logger.info("百度语音识别到了：{}".format(res["result"]))
+            text = "".join(res["result"])
+            reply = Reply(ReplyType.TEXT, text)
+        else:
+            logger.info("百度语音识别出错了: {}".format(res["err_msg"]))
+            if res["err_msg"] == "request pv too much":
+                logger.info("  出现这个原因很可能是你的百度语音服务调用量超出限制，或未开通付费")
+            reply = Reply(ReplyType.ERROR,
+                          "百度语音识别出错了；{0}".format(res["err_msg"]))
+        return reply
 
     def textToVoice(self, text):
         result = self.client.synthesis(text, 'zh', 1, {
@@ -30,7 +64,8 @@ class BaiduVoice(Voice):
             fileName = TmpDir().path() + '语音回复_' + str(int(time.time())) + '.mp3'
             with open(fileName, 'wb') as f:
                 f.write(result)
-            logger.info('[Baidu] textToVoice text={} voice file name={}'.format(text, fileName))
+            logger.info(
+                '[Baidu] textToVoice text={} voice file name={}'.format(text, fileName))
             reply = Reply(ReplyType.VOICE, fileName)
         else:
             logger.error('[Baidu] textToVoice error={}'.format(result))