修复语音识别报错

src/flutter_sound_recorder.js

@@ -327,7 +327,51 @@ class FlutterSoundRecorder {
             DBG,
             "On data available : " + e.data.constructor.name
           );
-          chunks.push(e.data);
+          const fileReader = new FileReader();
+          fileReader.onload = function() {
+            // 读取完成后的回调函数
+            const audioContext = new AudioContext();
+            audioContext.decodeAudioData(fileReader.result, function(audioBuffer) {
+                  chunks.push(audioBuffer);
+                  var dataBuffer = [];
+                  var audioBufferData = audioBuffer.getChannelData(0);
+                  const data = new Float32Array(audioBufferData);
+                  const out = new Int16Array(audioBufferData.length);
+                  for (let i = 0; i < data.length; i++) {
+                          const s = Math.max(-1, Math.min(1, data[i]));
+                          out[i] = (s < 0 ? s * 0x8000 : s * 0x7FFF);
+                  }
+                  this.samplesMono = out;
+                  this.maxSamples = 1152;
+                  let remaining = this.samplesMono.length;
+                
+                  var mp3Encoder = new lamejs.Mp3Encoder(1,44100,128);
+                  for (let i = 0; remaining >= 0; i += this.maxSamples) {
+                    const left = this.samplesMono.subarray(i, i + this.maxSamples);
+                    const mp3buffer = mp3Encoder.encodeBuffer(left);
+                    dataBuffer.push(new Int8Array(mp3buffer));
+                    remaining -= this.maxSamples;
+                  }
+                  var blob = new Blob(dataBuffer, { type: 'audio/mp3' });
+                  var url = URL.createObjectURL(blob);
+                  me.callbackTable[CB_recorder_log](me.callback, DBG, 'Instance Number : ' + me.instanceNo.toString())
+                  me.setRecordURL(path, url);
+                  var found = me.localObjects.findIndex(element => element == path);
+                  if (found != null && found >= 0) {
+                          me.callbackTable[CB_recorder_log](me.callback, DBG, "Found : " + found);
+                          me.localObjects[found] = path;
+                  } else {
+                          me.callbackTable[CB_recorder_log](me.callback, DBG, "NOT FOUND! : " + path);
+                          me.localObjects.push(path);
+                  }
+                  chunks = [];///[];
+                  me.callbackTable[CB_recorder_log](me.callback, DBG, 'recorder stopped');
+                  me.mediaRecorder = null;
+                  me.callbackTable[CB_stopRecorderCompleted](me.callback, IS_RECORDER_STOPPED, true, me.getRecordURL(path));
+                  me.callbackTable[CB_recorder_log](me.callback, DBG, '<--- mediaRecorder onstop');
+            });
+          }
+          fileReader.readAsArrayBuffer(e.data);
         }
       }
     };
@@ -403,49 +447,14 @@ class FlutterSoundRecorder {
         DBG,
         "---> mediaRecorder onstop"
       );
-      var blob;
-      if (path.indexOf("@") > 0) {
-        blob = new Blob(chunks, { type: mime_types[codec] });
-      } else {
-        var encoder = new WavAudioEncoder(16000, 2);
-        encoder.encode(chunks);
-        blob = encoder.finish();
-      }
+      var blob = new Blob(chunks, { type: mime_types[codec] });
       var url = URL.createObjectURL(blob);
       me.callbackTable[CB_recorder_log](
         me.callback,
         DBG,
         "Instance Number : " + me.instanceNo.toString()
       );
-
       me.setRecordURL(path, url);
-
-      var found = me.localObjects.findIndex((element) => element == path);
-      if (found != null && found >= 0) {
-        me.callbackTable[CB_recorder_log](me.callback, DBG, "Found : " + found);
-        me.localObjects[found] = path;
-      } else {
-        me.callbackTable[CB_recorder_log](
-          me.callback,
-          DBG,
-          "NOT FOUND! : " + path
-        );
-        me.localObjects.push(path);
-      }
-      chunks = null; ///[];
-      me.callbackTable[CB_recorder_log](me.callback, DBG, "recorder stopped");
-      me.mediaRecorder = null;
-      me.callbackTable[CB_stopRecorderCompleted](
-        me.callback,
-        IS_RECORDER_STOPPED,
-        true,
-        me.getRecordURL(path)
-      );
-      me.callbackTable[CB_recorder_log](
-        me.callback,
-        DBG,
-        "<--- mediaRecorder onstop"
-      );
     };
     //});
   }