Play Multiple audio files through ExoPlayer or some other option?

Question

My problem: I want to load 70 sounds in my app and then want to play multiple sound(maximum 8 sound at a time). Example app is below: https://play.google.com/store/apps/details?id=net.relaxio.sleepo

I try SoundPool system in my app and it give me a problem in loading. SoundPool take about more then 60 seconds for loading 70 files. So this option is not good for my app. Then i try MediaPlayer. MediaPlayer is ok with loading but give another problem. When i set looping in mediaplayer then it give a gap between restarting. Then i found a github project that play multiple sound at a time and also the loading is fast but still i have problem with this project. It can't load more then 30 sounds properly. In this project they use ExoPlayer(link is below). https://github.com/zoenb/Soft-Sound

Please help me what can i do so that the loading of sound and loop gap problem to be solved.

Are your sounds embedded within your application or do you have to download them first? How long are your sounds? I'm actually using several Exoplayer-instances within a Service in my app, and I can even play more than eight sounds at a time. (no looping, but restart is possible). check here: https://play.google.com/store/apps/details?id=de.jahpress.android — longi, Jul 18 '19 at 13:54
no issue with 8 sounds a time. issue of exoplayer occur when instances is more then 35. i have used it for 70 sounds. so it work upto 35 but after it it con't play some sounds — ibad ur rahman, Jul 19 '19 at 06:36
if you only want to play maximum 8 sounds at a time, i would suggest that you should have 8 instances of exoplayer and switch the sounds instead of keeping an instance for every sound. if i understood correctly — longi, Jul 19 '19 at 10:23

Priyanka · Accepted Answer · 2019-07-23T06:42:27.793

yes, you have to create multiple(8) instances of exoplayer, you can't do it with one instance

here is my code,

    private void initPlayer() {
      if (player == null) {
        trackSelectorParameters = new DefaultTrackSelector.ParametersBuilder().build();
        TrackSelection.Factory trackSelectionFactory = new AdaptiveTrackSelection.Factory();
        trackSelector = new DefaultTrackSelector(trackSelectionFactory);
        trackSelector.setParameters(trackSelectorParameters);

        RenderersFactory renderersFactory = ((MyAppApplication) context.getApplicationContext()).buildRenderersFactory();

        player = ExoPlayerFactory.newSimpleInstance(context, renderersFactory, trackSelector);

        player.setPlayWhenReady(true);

        //to print log of ExoPlayer
        //player.addAnalyticsListener(new EventLogger(trackSelector));

        progressiveMediaSourceFactory = new ProgressiveMediaSource.Factory(dataSourceFactory);

      }
    }

use above code to initialize exoplayer and call this method to add all the 8 URIs to play at the same time

 public void startPlaying(Uri uri) {
        if (player == null) initPlayer();
        MediaSource mediaSource = progressiveMediaSourceFactory.createMediaSource(uri);
        player.prepare(mediaSource, true, false);
  }

here is the Github link - https://github.com/google/ExoPlayer

use exoplayer-core library

for that, I would like to suggest you make a separate class to ExoPlayer to initialize, start, stop and all like...

public class MyAppExoPlayer {

private final Context context;


private DataSource.Factory dataSourceFactory;
private SimpleExoPlayer player;
private DefaultTrackSelector trackSelector;
private DefaultTrackSelector.Parameters trackSelectorParameters;


private ProgressiveMediaSource.Factory progressiveMediaSourceFactory;


private ConcatenatingMediaSource concatenatingMediaSource;
private int currentMediaPlayerIndex = 0;

public MyAppExoPlayer(Context context) {
    this.context = context;

    dataSourceFactory = ((MyAppApplication) context.getApplicationContext()).buildDataSourceFactory();

    initPlayer();
}

private void initPlayer() {
    if (player == null) {
        trackSelectorParameters = new DefaultTrackSelector.ParametersBuilder().build();
        TrackSelection.Factory trackSelectionFactory = new AdaptiveTrackSelection.Factory();
        trackSelector = new DefaultTrackSelector(trackSelectionFactory);
        trackSelector.setParameters(trackSelectorParameters);

        RenderersFactory renderersFactory = ((MyAppApplication) context.getApplicationContext()).buildRenderersFactory();

        player = ExoPlayerFactory.newSimpleInstance(context, renderersFactory, trackSelector);

        player.setPlayWhenReady(true);

        //to print log of ExoPlayer
        //player.addAnalyticsListener(new EventLogger(trackSelector));

        progressiveMediaSourceFactory = new ProgressiveMediaSource.Factory(dataSourceFactory);

    }

    concatenatingMediaSource = new ConcatenatingMediaSource();
}

public void startPlaying(Uri uri) {
    if (player == null) initPlayer();
    MediaSource mediaSource = progressiveMediaSourceFactory.createMediaSource(uri);
    player.prepare(mediaSource, true, false);
}

public void addToQ(Uri uri) {
    if (player == null) return;
    MediaSource mediaSource = progressiveMediaSourceFactory.createMediaSource(uri);
    concatenatingMediaSource.addMediaSource(mediaSource);
}

public void stopPlaying() {
    if (player != null) {
        player.stop(true);
        concatenatingMediaSource.clear();
    }
}

public long getCurrentPosition() {
    if (player != null)
        return player.getCurrentPosition();
    return 0;
}

public void releasePlayer() {
    if (player != null) {

        if (trackSelector != null) {
            trackSelectorParameters = trackSelector.getParameters();
        }

        player.release();
        player = null;
        trackSelector = null;
    }
}
}

Now create 8 instances if MyAppExoPlayer and call startPlaying()

ProgressiveMediaSource is showing error "unknown symbol". i use exoplayer version library "2.8.4" — ibad ur rahman, Jul 23 '19 at 06:23
use 2.10.0 `implementation 'com.google.android.exoplayer:exoplayer-core:2.10.0'` — Priyanka, Jul 23 '19 at 06:26
ProgressiveMediaSource issue is resolved but still ExoPlayerStateListener is remaining — ibad ur rahman, Jul 23 '19 at 06:32
ohh, it's not any listener inside lib, it is for my project only, you can remove this — Priyanka, Jul 23 '19 at 06:41
sorry for irritating questions. what is "MyAppApplication" it also give same problem — ibad ur rahman, Jul 23 '19 at 06:43
which is application class, you can find all the things inside this link, please refer it https://github.com/google/ExoPlayer/blob/release-v2/demos/main/src/main/java/com/google/android/exoplayer2/demo/DemoApplication.java — Priyanka, Jul 23 '19 at 06:45
Let us [continue this discussion in chat](https://chat.stackoverflow.com/rooms/196853/discussion-between-ibad-ur-rahman-and-priyankagb). — ibad ur rahman, Jul 23 '19 at 09:29
you can use player.setVolume(volume); use 0f for mute & 1f for full volume, the volume should be between 0 to 1 — Priyanka, Jul 23 '19 at 10:06

Play Multiple audio files through ExoPlayer or some other option?

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