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私のAndroid搭載アプリケーションにビデオプレーヤー（ExoPlayer）を実装したいと思います。プレイヤーはいくつかのURLからビデオを再生する必要があります（大きくない、約2-3分）。ネクサス5ではうまく動作しますが、残念ながら電話「Samsung GT-I8552 Galaxy Win」では動作しません。アプリケーションのコンパイルと起動後に例外ログがあります。ExoPlayerは一部のデバイスで動作しません
内部実行時エラーです。
android.media.MediaCodec.dequeueOutputBufferでjava.lang.IllegalStateException
（ネイティブメソッド）
そして、これは私のコードです：
private SurfaceView surfaceView;
private ExoPlayer player;
private MediaCodecVideoTrackRenderer videoRenderer;
private MediaCodecAudioTrackRenderer audioRenderer;
private CustomMediaController mediaController;
private String userAgent;
private final int RENDERER_COUNT = 8;
private static final int BUFFER_SEGMENT_SIZE = 64 * 1024;
private static final int BUFFER_SEGMENT_COUNT = 256;
private static final int minBufferMs = 10000;
private static final int minRebufferMs = 5000;
private final String videoUrl_2 = "someurl...";
...
surfaceView = (SurfaceView) findViewById(R.id.surface_view);
player = ExoPlayer.Factory.newInstance(RENDERER_COUNT, minBufferMs, minRebufferMs);
userAgent = Util.getUserAgent(this, "MyPlayer");
Allocator allocator = new DefaultAllocator(BUFFER_SEGMENT_SIZE);
DataSource dataSource = new DefaultUriDataSource(context, null, userAgent);
ExtractorSampleSource sampleSource = new ExtractorSampleSource(Uri.parse(videoUrl_2), dataSource, allocator, BUFFER_SEGMENT_COUNT * BUFFER_SEGMENT_SIZE);
videoRenderer = new MediaCodecVideoTrackRenderer(context,
sampleSource, MediaCodecSelector.DEFAULT, MediaCodec.VIDEO_SCALING_MODE_SCALE_TO_FIT_WITH_CROPPING);
audioRenderer = new MediaCodecAudioTrackRenderer(sampleSource, MediaCodecSelector.DEFAULT);
player.prepare(videoRenderer, audioRenderer);
player.sendMessage(videoRenderer, MediaCodecVideoTrackRenderer.MSG_SET_SURFACE, surfaceView.getHolder().getSurface());
player.setPlayWhenReady(true);
CustomMediaPlayerControl customMediaPlayerControl = new CustomMediaPlayerControl(player);
mediaController = new CustomMediaController(context);
mediaController.setMediaPlayer(customMediaPlayerControl);
mediaController.setAnchorView(surfaceView);
mediaController.setEnabled(true);
私のクラスCustomMediaPlayerControl：
public class CustomMediaPlayerControl implements MediaController.MediaPlayerControl {
private ExoPlayer player;
public CustomMediaPlayerControl(ExoPlayer player) {
this.player = player;
}
@Override
public void start() {
player.setPlayWhenReady(true);
}
@Override
public void pause() {
player.setPlayWhenReady(false);
}
@Override
public int getDuration() {
return (int) player.getDuration();
}
@Override
public int getCurrentPosition() {
return (int) player.getCurrentPosition();
}
@Override
public void seekTo(int pos) {
player.seekTo(pos);
}
@Override
public boolean isPlaying() {
return player.getPlayWhenReady();
}
@Override
public int getBufferPercentage() {
return (int) player.getBufferedPercentage();
}
@Override
public boolean canPause() {
return true;
}
@Override
public boolean canSeekBackward() {
return true;
}
@Override
public boolean canSeekForward() {
return true;
}
@Override
public int getAudioSessionId() {
return 0;
}
}
そして、私のクラスCustomMediaController：
public class CustomMediaController extends MediaController {
private MediaController.MediaPlayerControl playerControl;
public CustomMediaController(Context context) {
super(context);
}
@Override
public void setMediaPlayer(MediaController.MediaPlayerControl playerControl) {
super.setMediaPlayer(playerControl);
this.playerControl = playerControl;
}
@Override
public boolean dispatchKeyEvent(KeyEvent event) {
int keyCode = event.getKeyCode();
if (playerControl.canSeekForward() && keyCode == KeyEvent.KEYCODE_MEDIA_FAST_FORWARD) {
if (event.getAction() == KeyEvent.ACTION_DOWN) {
playerControl.seekTo(playerControl.getCurrentPosition() + 15000); // milliseconds
show();
}
return true;
} else if (playerControl.canSeekBackward() && keyCode == KeyEvent.KEYCODE_MEDIA_REWIND) {
if (event.getAction() == KeyEvent.ACTION_DOWN) {
playerControl.seekTo(playerControl.getCurrentPosition() - 5000); // milliseconds
show();
}
return true;
}
return super.dispatchKeyEvent(event);
}
}