防止多个track重复驱动静音生成

src/Common/MediaSink.cpp

@@ -230,16 +230,21 @@ static uint8_t s_mute_adts[] = {0xff, 0xf1, 0x6c, 0x40, 0x2d, 0x3f, 0xfc, 0x00,
 static uint8_t ADTS_CONFIG[2] = { 0x15, 0x88 };
 
 bool MuteAudioMaker::inputFrame(const Frame::Ptr &frame) {
-    if (frame->getTrackType() == TrackVideo) {
+    if (_track_index == -1) {
+        // 锁定track
+        _track_index = frame->getIndex();
+    }
+    if (frame->getIndex() != _track_index) {
+        // 不是锁定的track
+        return false;
+    }
     auto audio_idx = frame->dts() / MUTE_ADTS_DATA_MS;
     if (_audio_idx != audio_idx) {
         _audio_idx = audio_idx;
-            auto aacFrame = std::make_shared<FrameToCache<FrameFromPtr>>(CodecAAC, (char *) MUTE_ADTS_DATA, sizeof(s_mute_adts),
+        auto aacFrame = std::make_shared<FrameToCache<FrameFromPtr>>(CodecAAC, (char *)MUTE_ADTS_DATA, sizeof(s_mute_adts), _audio_idx * MUTE_ADTS_DATA_MS, 0, 7);
-                                                                         _audio_idx * MUTE_ADTS_DATA_MS, 0, 7);
         aacFrame->setIndex(MUTE_AUDIO_INDEX);
         return FrameDispatcher::inputFrame(aacFrame);
     }
-    }
     return false;
 }
 

src/Common/MediaSink.h

@@ -55,6 +55,7 @@ public:
     bool inputFrame(const Frame::Ptr &frame) override;
 
 private:
+    int _track_index = -1;
     uint64_t _audio_idx = 0;
 };