@Override
public int read(ExtractorInput input, PositionHolder seekPosition)
throws IOException, InterruptedException {
if (vorbisSetup == null) {
vorbisSetup = readSetupHeaders(input, scratch);
ArrayList<byte[]> codecInitialisationData = new ArrayList<>();
codecInitialisationData.clear();
codecInitialisationData.add(vorbisSetup.idHeader.data);
codecInitialisationData.add(vorbisSetup.setupHeaderData);
long duration =
input.getLength() == C.LENGTH_UNBOUNDED
? C.UNKNOWN_TIME_US
: input.getLength() * 8000000 / vorbisSetup.idHeader.getApproximateBitrate();
trackOutput.format(
MediaFormat.createAudioFormat(
null,
MimeTypes.AUDIO_VORBIS,
this.vorbisSetup.idHeader.bitrateNominal,
OGG_MAX_SEGMENT_SIZE * 255,
duration,
this.vorbisSetup.idHeader.channels,
(int) this.vorbisSetup.idHeader.sampleRate,
codecInitialisationData,
null));
}
if (oggReader.readPacket(input, scratch)) {
// if this is an audio packet...
if ((scratch.data[0] & 0x01) != 1) {
// ... we need to decode the block size
int packetBlockSize = decodeBlockSize(scratch.data[0], vorbisSetup);
// a packet contains samples produced from overlapping the previous and current frame data
// (https://www.xiph.org/vorbis/doc/Vorbis_I_spec.html#x1-350001.3.2)
int samplesInPacket =
seenFirstAudioPacket ? (packetBlockSize + previousPacketBlockSize) / 4 : 0;
// codec expects the number of samples appended to audio data
appendNumberOfSamples(scratch, samplesInPacket);
// calculate time and send audio data to codec
long timeUs = elapsedSamples * C.MICROS_PER_SECOND / vorbisSetup.idHeader.sampleRate;
trackOutput.sampleData(scratch, scratch.limit());
trackOutput.sampleMetadata(timeUs, C.SAMPLE_FLAG_SYNC, scratch.limit(), 0, null);
// update state in members for next iteration
seenFirstAudioPacket = true;
elapsedSamples += samplesInPacket;
previousPacketBlockSize = packetBlockSize;
}
scratch.reset();
return RESULT_CONTINUE;
}
return RESULT_END_OF_INPUT;
}
private MediaFormat initManifestTrack(
SmoothStreamingManifest manifest, int elementIndex, int trackIndex) {
int manifestTrackKey = getManifestTrackKey(elementIndex, trackIndex);
MediaFormat mediaFormat = mediaFormats.get(manifestTrackKey);
if (mediaFormat != null) {
// Already initialized.
return mediaFormat;
}
// Build the media format.
long durationUs = live ? C.UNKNOWN_TIME_US : manifest.durationUs;
StreamElement element = manifest.streamElements[elementIndex];
Format format = element.tracks[trackIndex].format;
byte[][] csdArray = element.tracks[trackIndex].csd;
int mp4TrackType;
switch (element.type) {
case StreamElement.TYPE_VIDEO:
mediaFormat =
MediaFormat.createVideoFormat(
format.mimeType,
format.bitrate,
MediaFormat.NO_VALUE,
durationUs,
format.width,
format.height,
0,
Arrays.asList(csdArray));
mp4TrackType = Track.TYPE_vide;
break;
case StreamElement.TYPE_AUDIO:
List<byte[]> csd;
if (csdArray != null) {
csd = Arrays.asList(csdArray);
} else {
csd =
Collections.singletonList(
CodecSpecificDataUtil.buildAacAudioSpecificConfig(
format.audioSamplingRate, format.audioChannels));
}
mediaFormat =
MediaFormat.createAudioFormat(
format.mimeType,
format.bitrate,
MediaFormat.NO_VALUE,
durationUs,
format.audioChannels,
format.audioSamplingRate,
csd);
mp4TrackType = Track.TYPE_soun;
break;
case StreamElement.TYPE_TEXT:
mediaFormat =
MediaFormat.createTextFormat(
format.mimeType, format.bitrate, format.language, durationUs);
mp4TrackType = Track.TYPE_text;
break;
default:
throw new IllegalStateException("Invalid type: " + element.type);
}
// Build the extractor.
FragmentedMp4Extractor mp4Extractor =
new FragmentedMp4Extractor(
FragmentedMp4Extractor.WORKAROUND_EVERY_VIDEO_FRAME_IS_SYNC_FRAME);
Track mp4Track =
new Track(
trackIndex,
mp4TrackType,
element.timescale,
durationUs,
mediaFormat,
trackEncryptionBoxes,
mp4TrackType == Track.TYPE_vide ? 4 : -1);
mp4Extractor.setTrack(mp4Track);
// Store the format and a wrapper around the extractor.
mediaFormats.put(manifestTrackKey, mediaFormat);
extractorWrappers.put(manifestTrackKey, new ChunkExtractorWrapper(mp4Extractor));
return mediaFormat;
}
