@Override
public int readData(
int track, long positionUs, MediaFormatHolder formatHolder, SampleHolder sampleHolder) {
Assertions.checkState(state == STATE_ENABLED);
downstreamPositionUs = positionUs;
if (pendingDiscontinuity || isPendingReset()) {
return NOTHING_READ;
}
boolean haveSamples = !sampleQueue.isEmpty();
BaseMediaChunk currentChunk = mediaChunks.getFirst();
while (haveSamples
&& mediaChunks.size() > 1
&& mediaChunks.get(1).getFirstSampleIndex() <= sampleQueue.getReadIndex()) {
mediaChunks.removeFirst();
currentChunk = mediaChunks.getFirst();
}
Format format = currentChunk.format;
if (!format.equals(downstreamFormat)) {
notifyDownstreamFormatChanged(format, currentChunk.trigger, currentChunk.startTimeUs);
}
downstreamFormat = format;
if (haveSamples || currentChunk.isMediaFormatFinal) {
MediaFormat mediaFormat = currentChunk.getMediaFormat();
if (!mediaFormat.equals(downstreamMediaFormat)) {
formatHolder.format = mediaFormat;
formatHolder.drmInitData = currentChunk.getDrmInitData();
downstreamMediaFormat = mediaFormat;
return FORMAT_READ;
}
// If mediaFormat and downstreamMediaFormat are equal but different objects then the equality
// check above will have been expensive, comparing the fields in each format. We update
// downstreamMediaFormat here so that referential equality can be cheaply established during
// subsequent calls.
downstreamMediaFormat = mediaFormat;
}
if (!haveSamples) {
if (loadingFinished) {
return END_OF_STREAM;
}
return NOTHING_READ;
}
if (sampleQueue.getSample(sampleHolder)) {
boolean decodeOnly = sampleHolder.timeUs < lastSeekPositionUs;
sampleHolder.flags |= decodeOnly ? C.SAMPLE_FLAG_DECODE_ONLY : 0;
onSampleRead(currentChunk, sampleHolder);
return SAMPLE_READ;
}
return NOTHING_READ;
}
