ExoPlayer 예제

- 구글 ExoPlayer
https://github.com/google/ExoPlayer
https://developer.android.com/guide/topics/media/exoplayer

- 기본 미디어 플레이와 HLS 미디어 플레이 예제


1. 예제코드
- 어플리케이션 build.gradle 설정
implementation 'com.google.android.exoplayer:exoplayer:2.8.4'


- 기본코드
public class MainActivity extends AppCompatActivity {
    private static final String TAG = MainActivity.class.getSimpleName();

    private static class EventListener extends Player.DefaultEventListener {
        @Override
        public void onPlayerStateChanged(boolean playWhenReady, int playbackState) {
            String stateString;
            switch (playbackState) {
                case Player.STATE_IDLE:
                    stateString = "ExoPlayer.STATE_IDLE";
                    break;
                case Player.STATE_BUFFERING:
                    stateString = "ExoPlayer.STATE_BUFFERING";
                    break;
                case Player.STATE_READY:
                    stateString = "ExoPlayer.STATE_READY";
                    break;
                case Player.STATE_ENDED:
                    stateString = "ExoPlayer.STATE_ENDED";
                    break;
                default:
                    stateString = "UNKNOWN_STATE";
                    break;
            }
            Log.d(TAG, "changed state to " + stateString + ", playWhenReady: " + playWhenReady);
        }
    }

    private static final DefaultBandwidthMeter BANDWIDTH_METER = new DefaultBandwidthMeter();
    private SimpleExoPlayer exoPlayer;
    private long playbackPosition;
    private int currentWindow;
    private boolean playWhenReady = true;

    private EventListener eventListener = new EventListener();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    @Override
    protected void onResume() {
        super.onResume();
        initPlayer();
    }

    @Override
    protected void onPause() {
        super.onPause();
        releasePlayer();
    }

    @Override
    protected void onStop() {
        super.onStop();
        releasePlayer();
    }

    private void initPlayer() {
        String url = "https://bitdash-a.akamaihd.net/content/MI201109210084_1/m3u8s/f08e80da-bf1d-4e3d-8899-f0f6155f6efa.m3u8";
        PlayerView playerView = findViewById(R.id.playerView);

        TrackSelection.Factory adaptiveTrackSelectionFactory =
                new AdaptiveTrackSelection.Factory(BANDWIDTH_METER);
        exoPlayer = ExoPlayerFactory.newSimpleInstance(new DefaultRenderersFactory(this), new DefaultTrackSelector(adaptiveTrackSelectionFactory), new DefaultLoadControl());
        exoPlayer.addListener(new EventListener());


        MediaSource mediaSource = url.endsWith(".m3u8") ? buildMediaSourceHLS(Uri.parse(url)) : buildMediaSourceVideo(Uri.parse(url));
        exoPlayer.prepare(mediaSource, true, false);
        exoPlayer.setPlayWhenReady(playWhenReady);
        exoPlayer.seekTo(currentWindow, playbackPosition);
        playerView.setPlayer(exoPlayer);
    }

    private void releasePlayer() {
        if (exoPlayer != null) {
            playbackPosition = exoPlayer.getCurrentPosition();
            currentWindow = exoPlayer.getCurrentWindowIndex();
            playWhenReady = exoPlayer.getPlayWhenReady();
            exoPlayer.removeListener(eventListener);
            exoPlayer.release();
            exoPlayer = null;
        }
    }

    private MediaSource buildMediaSourceHLS(Uri uri) {
        String userAgent = System.getProperty("http.agent");
        Log.d(TAG, "UserAgent : " + userAgent);
        DataSource.Factory manifestDataSourceFactory = new DefaultHttpDataSourceFactory(userAgent);
        HlsMediaSource hlsMediaSource = new HlsMediaSource.Factory(manifestDataSourceFactory).createMediaSource(uri);

        return new ConcatenatingMediaSource(hlsMediaSource);
    }

    private MediaSource buildMediaSourceVideo(Uri uri) {
        String userAgent = System.getProperty("http.agent");
        Log.d(TAG, "UserAgent : " + userAgent);
        ExtractorMediaSource videoSource =
                new ExtractorMediaSource.Factory(
                        new DefaultHttpDataSourceFactory(TextUtils.isEmpty(userAgent) ? "DefaultHttpDataSourceFactory" : userAgent)).
                        createMediaSource(uri);

        return new ConcatenatingMediaSource(videoSource);
    }
}

> buildMediaSourceHLS 메소드는 HLS 미디어를 재생하기위한 메소드
> 예제에서는 PlayerView를 통해 ExoPlayer를 재생하는 예제.
> 안드로이드 MediaPlayer과 동일하게 구현 가능.
> 주요 특징은 별도 검색으로 확인해 볼 것.
> 사용된 HSL 미디어 소스
https://bitdash-a.akamaihd.net/content/MI201109210084_1/m3u8s/f08e80da-bf1d-4e3d-8899-f0f6155f6efa.m3u8


추가) 오디오와 영상이 분리된 경우
private MediaSource buildMediaSourceAdaptive(Uri video, Uri audio) {

ExtractorMediaSource videoSource =
new ExtractorMediaSource.Factory(
new DefaultHttpDataSourceFactory("exoplayer-codelab")).
createMediaSource(video);
ExtractorMediaSource audioSource =
new ExtractorMediaSource.Factory(
new DefaultHttpDataSourceFactory("exoplayer-codelab")).
createMediaSource(audio);
MergingMediaSource mergingMediaSource = new MergingMediaSource(videoSource, audioSource);
return new ConcatenatingMediaSource(mergingMediaSource);
}




2. 샘플코드
소스코드
APK