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

Example 6 with SequenceableLoader

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

the class HlsMediaPeriod method selectTracks.

@Override
public long selectTracks(TrackSelection[] selections, boolean[] mayRetainStreamFlags, SampleStream[] streams, boolean[] streamResetFlags, long positionUs) {
    // Map each selection and stream onto a child period index.
    int[] streamChildIndices = new int[selections.length];
    int[] selectionChildIndices = new int[selections.length];
    for (int i = 0; i < selections.length; i++) {
        streamChildIndices[i] = streams[i] == null ? C.INDEX_UNSET : streamWrapperIndices.get(streams[i]);
        selectionChildIndices[i] = C.INDEX_UNSET;
        if (selections[i] != null) {
            TrackGroup trackGroup = selections[i].getTrackGroup();
            for (int j = 0; j < sampleStreamWrappers.length; j++) {
                if (sampleStreamWrappers[j].getTrackGroups().indexOf(trackGroup) != C.INDEX_UNSET) {
                    selectionChildIndices[i] = j;
                    break;
                }
            }
        }
    }
    boolean selectedNewTracks = false;
    streamWrapperIndices.clear();
    // Select tracks for each child, copying the resulting streams back into a new streams array.
    SampleStream[] newStreams = new SampleStream[selections.length];
    SampleStream[] childStreams = new SampleStream[selections.length];
    TrackSelection[] childSelections = new TrackSelection[selections.length];
    ArrayList<HlsSampleStreamWrapper> enabledSampleStreamWrapperList = new ArrayList<>(sampleStreamWrappers.length);
    for (int i = 0; i < sampleStreamWrappers.length; i++) {
        for (int j = 0; j < selections.length; j++) {
            childStreams[j] = streamChildIndices[j] == i ? streams[j] : null;
            childSelections[j] = selectionChildIndices[j] == i ? selections[j] : null;
        }
        selectedNewTracks |= sampleStreamWrappers[i].selectTracks(childSelections, mayRetainStreamFlags, childStreams, streamResetFlags, !seenFirstTrackSelection);
        boolean wrapperEnabled = false;
        for (int j = 0; j < selections.length; j++) {
            if (selectionChildIndices[j] == i) {
                // Assert that the child provided a stream for the selection.
                Assertions.checkState(childStreams[j] != null);
                newStreams[j] = childStreams[j];
                wrapperEnabled = true;
                streamWrapperIndices.put(childStreams[j], i);
            } else if (streamChildIndices[j] == i) {
                // Assert that the child cleared any previous stream.
                Assertions.checkState(childStreams[j] == null);
            }
        }
        if (wrapperEnabled) {
            enabledSampleStreamWrapperList.add(sampleStreamWrappers[i]);
        }
    }
    // Copy the new streams back into the streams array.
    System.arraycopy(newStreams, 0, streams, 0, newStreams.length);
    // Update the local state.
    enabledSampleStreamWrappers = new HlsSampleStreamWrapper[enabledSampleStreamWrapperList.size()];
    enabledSampleStreamWrapperList.toArray(enabledSampleStreamWrappers);
    // initialization.
    if (enabledSampleStreamWrappers.length > 0) {
        enabledSampleStreamWrappers[0].setIsTimestampMaster(true);
        for (int i = 1; i < enabledSampleStreamWrappers.length; i++) {
            enabledSampleStreamWrappers[i].setIsTimestampMaster(false);
        }
    }
    sequenceableLoader = new CompositeSequenceableLoader(enabledSampleStreamWrappers);
    if (seenFirstTrackSelection && selectedNewTracks) {
        seekToUs(positionUs);
        // We'll need to reset renderers consuming from all streams due to the seek.
        for (int i = 0; i < selections.length; i++) {
            if (streams[i] != null) {
                streamResetFlags[i] = true;
            }
        }
    }
    seenFirstTrackSelection = true;
    return positionUs;
}