我怎样才能从Exoplayer获得audiosessionId？

Question

我试图在我的项目中使用Exoplayer（而不是Android的MediaPlayer）。但是，我有一个问题：获取当前音频会话的ID。使用传统的MediaPlayer，通过调用getAudioSessionId很容易，但Exoplayer没有任何相应的方法。有人帮我吗？

Answer 1

从ExoPlayer2开始，MediaCodecAudioTrackRenderer和PlayerControl不能再用于获取AudioSessionId。相反，您应该在exoPlayer实例上设置AudioRendererEventListener。

exoPlayer.setAudioDebugListener(new AudioRendererEventListener(){

            @Override
            public void onAudioEnabled(DecoderCounters counters) {

            }

            @Override
            public void onAudioSessionId(int audioSessionId) {
                //TODO Do something with your AudioSessionID here
            }

            @Override
            public void onAudioDecoderInitialized(String decoderName, long initializedTimestampMs, long initializationDurationMs) {

            }

            @Override
            public void onAudioInputFormatChanged(Format format) {

            }

            @Override
            public void onAudioTrackUnderrun(int bufferSize, long bufferSizeMs, long elapsedSinceLastFeedMs) {

            }

            @Override
            public void onAudioDisabled(DecoderCounters counters) {

            }
});

Answer 2

  import  com.google.android.exoplayer.util.PlayerControl;

通过传递Exoplayer实例来实例化PlayerControl对象。并调用getAudioSessionId。

PlayerControl playerControl=new PlayerControl(Exoplayer.instance);

int audioSessionId=playerControl.getAudioSessionId();

我认为这就是你想要的。

Answer 3

以下是我用于获取音频会话ID的代码段 -

  FrameworkSampleSource sampleSource = new FrameworkSampleSource(getApplicationContext(), builtUri, null);
  MediaCodecAudioTrackRenderer audioRenderer = new MediaCodecAudioTrackRenderer(sampleSource, MediaCodecSelector.DEFAULT){
        @Override
        protected void onAudioSessionId(int audioSessionId) {

            // do whatever u want to do with id.
        }
    };

   exoPlayer.prepare(audioRenderer);
   exoPlayer.setPlayWhenReady(true);

Answer 4

Player.AudioComponent audioComponent = exoPlayer.getAudioComponent();
int audioSessionid=audioComponent.getAudioSessionId();