Examples with EmptySampleStream com.google.android.exoplayer2.source.EmptySampleStream used on opensource projects

Example 1 with EmptySampleStream

use of com.google.android.exoplayer2.source.EmptySampleStream in project ExoPlayer by google.

the class DashMediaPeriod method selectTracks.

@Override
public long selectTracks(TrackSelection[] selections, boolean[] mayRetainStreamFlags, SampleStream[] streams, boolean[] streamResetFlags, long positionUs) {
    int adaptationSetCount = adaptationSets.size();
    HashMap<Integer, ChunkSampleStream<DashChunkSource>> primarySampleStreams = new HashMap<>();
    // First pass for primary tracks.
    for (int i = 0; i < selections.length; i++) {
        if (streams[i] instanceof ChunkSampleStream) {
            @SuppressWarnings("unchecked") ChunkSampleStream<DashChunkSource> stream = (ChunkSampleStream<DashChunkSource>) streams[i];
            if (selections[i] == null || !mayRetainStreamFlags[i]) {
                stream.release();
                streams[i] = null;
            } else {
                int adaptationSetIndex = trackGroups.indexOf(selections[i].getTrackGroup());
                primarySampleStreams.put(adaptationSetIndex, stream);
            }
        }
        if (streams[i] == null && selections[i] != null) {
            int trackGroupIndex = trackGroups.indexOf(selections[i].getTrackGroup());
            if (trackGroupIndex < adaptationSetCount) {
                ChunkSampleStream<DashChunkSource> stream = buildSampleStream(trackGroupIndex, selections[i], positionUs);
                primarySampleStreams.put(trackGroupIndex, stream);
                streams[i] = stream;
                streamResetFlags[i] = true;
            }
        }
    }
    // Second pass for embedded tracks.
    for (int i = 0; i < selections.length; i++) {
        if ((streams[i] instanceof EmbeddedSampleStream || streams[i] instanceof EmptySampleStream) && (selections[i] == null || !mayRetainStreamFlags[i])) {
            // The stream is for an embedded track and is either no longer selected or needs replacing.
            releaseIfEmbeddedSampleStream(streams[i]);
            streams[i] = null;
        }
        // may have been replaced, selected or deselected.
        if (selections[i] != null) {
            int trackGroupIndex = trackGroups.indexOf(selections[i].getTrackGroup());
            if (trackGroupIndex >= adaptationSetCount) {
                int embeddedTrackIndex = trackGroupIndex - adaptationSetCount;
                EmbeddedTrackInfo embeddedTrackInfo = embeddedTrackInfos[embeddedTrackIndex];
                int adaptationSetIndex = embeddedTrackInfo.adaptationSetIndex;
                ChunkSampleStream<?> primaryStream = primarySampleStreams.get(adaptationSetIndex);
                SampleStream stream = streams[i];
                boolean mayRetainStream = primaryStream == null ? stream instanceof EmptySampleStream : (stream instanceof EmbeddedSampleStream && ((EmbeddedSampleStream) stream).parent == primaryStream);
                if (!mayRetainStream) {
                    releaseIfEmbeddedSampleStream(stream);
                    streams[i] = primaryStream == null ? new EmptySampleStream() : primaryStream.selectEmbeddedTrack(positionUs, embeddedTrackInfo.trackType);
                    streamResetFlags[i] = true;
                }
            }
        }
    }
    sampleStreams = newSampleStreamArray(primarySampleStreams.size());
    primarySampleStreams.values().toArray(sampleStreams);
    sequenceableLoader = new CompositeSequenceableLoader(sampleStreams);
    return positionUs;
}