use of androidx.media3.extractor.Extractor in project media by androidx.
the class Mp4Extractor method processMoovAtom.
/**
* Updates the stored track metadata to reflect the contents of the specified moov atom.
*/
private void processMoovAtom(ContainerAtom moov) throws ParserException {
int firstVideoTrackIndex = C.INDEX_UNSET;
long durationUs = C.TIME_UNSET;
List<Mp4Track> tracks = new ArrayList<>();
// Process metadata.
@Nullable Metadata udtaMetaMetadata = null;
@Nullable Metadata smtaMetadata = null;
boolean isQuickTime = fileType == FILE_TYPE_QUICKTIME;
GaplessInfoHolder gaplessInfoHolder = new GaplessInfoHolder();
@Nullable Atom.LeafAtom udta = moov.getLeafAtomOfType(Atom.TYPE_udta);
if (udta != null) {
Pair<@NullableType Metadata, @NullableType Metadata> udtaMetadata = AtomParsers.parseUdta(udta);
udtaMetaMetadata = udtaMetadata.first;
smtaMetadata = udtaMetadata.second;
if (udtaMetaMetadata != null) {
gaplessInfoHolder.setFromMetadata(udtaMetaMetadata);
}
}
@Nullable Metadata mdtaMetadata = null;
@Nullable Atom.ContainerAtom meta = moov.getContainerAtomOfType(Atom.TYPE_meta);
if (meta != null) {
mdtaMetadata = AtomParsers.parseMdtaFromMeta(meta);
}
boolean ignoreEditLists = (flags & FLAG_WORKAROUND_IGNORE_EDIT_LISTS) != 0;
List<TrackSampleTable> trackSampleTables = parseTraks(moov, gaplessInfoHolder, /* duration= */
C.TIME_UNSET, /* drmInitData= */
null, ignoreEditLists, isQuickTime, /* modifyTrackFunction= */
track -> track);
ExtractorOutput extractorOutput = checkNotNull(this.extractorOutput);
int trackCount = trackSampleTables.size();
for (int i = 0; i < trackCount; i++) {
TrackSampleTable trackSampleTable = trackSampleTables.get(i);
if (trackSampleTable.sampleCount == 0) {
continue;
}
Track track = trackSampleTable.track;
long trackDurationUs = track.durationUs != C.TIME_UNSET ? track.durationUs : trackSampleTable.durationUs;
durationUs = max(durationUs, trackDurationUs);
Mp4Track mp4Track = new Mp4Track(track, trackSampleTable, extractorOutput.track(i, track.type));
int maxInputSize;
if (MimeTypes.AUDIO_TRUEHD.equals(track.format.sampleMimeType)) {
// TrueHD groups samples per chunks of TRUEHD_RECHUNK_SAMPLE_COUNT samples.
maxInputSize = trackSampleTable.maximumSize * Ac3Util.TRUEHD_RECHUNK_SAMPLE_COUNT;
} else {
// Each sample has up to three bytes of overhead for the start code that replaces its
// length. Allow ten source samples per output sample, like the platform extractor.
maxInputSize = trackSampleTable.maximumSize + 3 * 10;
}
Format.Builder formatBuilder = track.format.buildUpon();
formatBuilder.setMaxInputSize(maxInputSize);
if (track.type == C.TRACK_TYPE_VIDEO && trackDurationUs > 0 && trackSampleTable.sampleCount > 1) {
float frameRate = trackSampleTable.sampleCount / (trackDurationUs / 1000000f);
formatBuilder.setFrameRate(frameRate);
}
MetadataUtil.setFormatGaplessInfo(track.type, gaplessInfoHolder, formatBuilder);
MetadataUtil.setFormatMetadata(track.type, udtaMetaMetadata, mdtaMetadata, formatBuilder, smtaMetadata, slowMotionMetadataEntries.isEmpty() ? null : new Metadata(slowMotionMetadataEntries));
mp4Track.trackOutput.format(formatBuilder.build());
if (track.type == C.TRACK_TYPE_VIDEO && firstVideoTrackIndex == C.INDEX_UNSET) {
firstVideoTrackIndex = tracks.size();
}
tracks.add(mp4Track);
}
this.firstVideoTrackIndex = firstVideoTrackIndex;
this.durationUs = durationUs;
this.tracks = tracks.toArray(new Mp4Track[0]);
accumulatedSampleSizes = calculateAccumulatedSampleSizes(this.tracks);
extractorOutput.endTracks();
extractorOutput.seekMap(this);
}
use of androidx.media3.extractor.Extractor in project media by androidx.
the class MatroskaExtractor method writeSampleData.
/**
* Writes data for a single sample to the track output.
*
* @param input The input from which to read sample data.
* @param track The track to output the sample to.
* @param size The size of the sample data on the input side.
* @return The final size of the written sample.
* @throws IOException If an error occurs reading from the input.
*/
@RequiresNonNull("#2.output")
private int writeSampleData(ExtractorInput input, Track track, int size) throws IOException {
if (CODEC_ID_SUBRIP.equals(track.codecId)) {
writeSubtitleSampleData(input, SUBRIP_PREFIX, size);
return finishWriteSampleData();
} else if (CODEC_ID_ASS.equals(track.codecId)) {
writeSubtitleSampleData(input, SSA_PREFIX, size);
return finishWriteSampleData();
} else if (CODEC_ID_VTT.equals(track.codecId)) {
writeSubtitleSampleData(input, VTT_PREFIX, size);
return finishWriteSampleData();
}
TrackOutput output = track.output;
if (!sampleEncodingHandled) {
if (track.hasContentEncryption) {
// If the sample is encrypted, read its encryption signal byte and set the IV size.
// Clear the encrypted flag.
blockFlags &= ~C.BUFFER_FLAG_ENCRYPTED;
if (!sampleSignalByteRead) {
input.readFully(scratch.getData(), 0, 1);
sampleBytesRead++;
if ((scratch.getData()[0] & 0x80) == 0x80) {
throw ParserException.createForMalformedContainer("Extension bit is set in signal byte", /* cause= */
null);
}
sampleSignalByte = scratch.getData()[0];
sampleSignalByteRead = true;
}
boolean isEncrypted = (sampleSignalByte & 0x01) == 0x01;
if (isEncrypted) {
boolean hasSubsampleEncryption = (sampleSignalByte & 0x02) == 0x02;
blockFlags |= C.BUFFER_FLAG_ENCRYPTED;
if (!sampleInitializationVectorRead) {
input.readFully(encryptionInitializationVector.getData(), 0, ENCRYPTION_IV_SIZE);
sampleBytesRead += ENCRYPTION_IV_SIZE;
sampleInitializationVectorRead = true;
// Write the signal byte, containing the IV size and the subsample encryption flag.
scratch.getData()[0] = (byte) (ENCRYPTION_IV_SIZE | (hasSubsampleEncryption ? 0x80 : 0x00));
scratch.setPosition(0);
output.sampleData(scratch, 1, TrackOutput.SAMPLE_DATA_PART_ENCRYPTION);
sampleBytesWritten++;
// Write the IV.
encryptionInitializationVector.setPosition(0);
output.sampleData(encryptionInitializationVector, ENCRYPTION_IV_SIZE, TrackOutput.SAMPLE_DATA_PART_ENCRYPTION);
sampleBytesWritten += ENCRYPTION_IV_SIZE;
}
if (hasSubsampleEncryption) {
if (!samplePartitionCountRead) {
input.readFully(scratch.getData(), 0, 1);
sampleBytesRead++;
scratch.setPosition(0);
samplePartitionCount = scratch.readUnsignedByte();
samplePartitionCountRead = true;
}
int samplePartitionDataSize = samplePartitionCount * 4;
scratch.reset(samplePartitionDataSize);
input.readFully(scratch.getData(), 0, samplePartitionDataSize);
sampleBytesRead += samplePartitionDataSize;
short subsampleCount = (short) (1 + (samplePartitionCount / 2));
int subsampleDataSize = 2 + 6 * subsampleCount;
if (encryptionSubsampleDataBuffer == null || encryptionSubsampleDataBuffer.capacity() < subsampleDataSize) {
encryptionSubsampleDataBuffer = ByteBuffer.allocate(subsampleDataSize);
}
encryptionSubsampleDataBuffer.position(0);
encryptionSubsampleDataBuffer.putShort(subsampleCount);
// Loop through the partition offsets and write out the data in the way ExoPlayer
// wants it (ISO 23001-7 Part 7):
// 2 bytes - sub sample count.
// for each sub sample:
// 2 bytes - clear data size.
// 4 bytes - encrypted data size.
int partitionOffset = 0;
for (int i = 0; i < samplePartitionCount; i++) {
int previousPartitionOffset = partitionOffset;
partitionOffset = scratch.readUnsignedIntToInt();
if ((i % 2) == 0) {
encryptionSubsampleDataBuffer.putShort((short) (partitionOffset - previousPartitionOffset));
} else {
encryptionSubsampleDataBuffer.putInt(partitionOffset - previousPartitionOffset);
}
}
int finalPartitionSize = size - sampleBytesRead - partitionOffset;
if ((samplePartitionCount % 2) == 1) {
encryptionSubsampleDataBuffer.putInt(finalPartitionSize);
} else {
encryptionSubsampleDataBuffer.putShort((short) finalPartitionSize);
encryptionSubsampleDataBuffer.putInt(0);
}
encryptionSubsampleData.reset(encryptionSubsampleDataBuffer.array(), subsampleDataSize);
output.sampleData(encryptionSubsampleData, subsampleDataSize, TrackOutput.SAMPLE_DATA_PART_ENCRYPTION);
sampleBytesWritten += subsampleDataSize;
}
}
} else if (track.sampleStrippedBytes != null) {
// If the sample has header stripping, prepare to read/output the stripped bytes first.
sampleStrippedBytes.reset(track.sampleStrippedBytes, track.sampleStrippedBytes.length);
}
if (track.maxBlockAdditionId > 0) {
blockFlags |= C.BUFFER_FLAG_HAS_SUPPLEMENTAL_DATA;
blockAdditionalData.reset(/* limit= */
0);
// If there is supplemental data, the structure of the sample data is:
// sample size (4 bytes) || sample data || supplemental data
scratch.reset(/* limit= */
4);
scratch.getData()[0] = (byte) ((size >> 24) & 0xFF);
scratch.getData()[1] = (byte) ((size >> 16) & 0xFF);
scratch.getData()[2] = (byte) ((size >> 8) & 0xFF);
scratch.getData()[3] = (byte) (size & 0xFF);
output.sampleData(scratch, 4, TrackOutput.SAMPLE_DATA_PART_SUPPLEMENTAL);
sampleBytesWritten += 4;
}
sampleEncodingHandled = true;
}
size += sampleStrippedBytes.limit();
if (CODEC_ID_H264.equals(track.codecId) || CODEC_ID_H265.equals(track.codecId)) {
// TODO: Deduplicate with Mp4Extractor.
// Zero the top three bytes of the array that we'll use to decode nal unit lengths, in case
// they're only 1 or 2 bytes long.
byte[] nalLengthData = nalLength.getData();
nalLengthData[0] = 0;
nalLengthData[1] = 0;
nalLengthData[2] = 0;
int nalUnitLengthFieldLength = track.nalUnitLengthFieldLength;
int nalUnitLengthFieldLengthDiff = 4 - track.nalUnitLengthFieldLength;
// start codes as we encounter them.
while (sampleBytesRead < size) {
if (sampleCurrentNalBytesRemaining == 0) {
// Read the NAL length so that we know where we find the next one.
writeToTarget(input, nalLengthData, nalUnitLengthFieldLengthDiff, nalUnitLengthFieldLength);
sampleBytesRead += nalUnitLengthFieldLength;
nalLength.setPosition(0);
sampleCurrentNalBytesRemaining = nalLength.readUnsignedIntToInt();
// Write a start code for the current NAL unit.
nalStartCode.setPosition(0);
output.sampleData(nalStartCode, 4);
sampleBytesWritten += 4;
} else {
// Write the payload of the NAL unit.
int bytesWritten = writeToOutput(input, output, sampleCurrentNalBytesRemaining);
sampleBytesRead += bytesWritten;
sampleBytesWritten += bytesWritten;
sampleCurrentNalBytesRemaining -= bytesWritten;
}
}
} else {
if (track.trueHdSampleRechunker != null) {
checkState(sampleStrippedBytes.limit() == 0);
track.trueHdSampleRechunker.startSample(input);
}
while (sampleBytesRead < size) {
int bytesWritten = writeToOutput(input, output, size - sampleBytesRead);
sampleBytesRead += bytesWritten;
sampleBytesWritten += bytesWritten;
}
}
if (CODEC_ID_VORBIS.equals(track.codecId)) {
// Vorbis decoder in android MediaCodec [1] expects the last 4 bytes of the sample to be the
// number of samples in the current page. This definition holds good only for Ogg and
// irrelevant for Matroska. So we always set this to -1 (the decoder will ignore this value if
// we set it to -1). The android platform media extractor [2] does the same.
// [1]
// https://android.googlesource.com/platform/frameworks/av/+/lollipop-release/media/libstagefright/codecs/vorbis/dec/SoftVorbis.cpp#314
// [2]
// https://android.googlesource.com/platform/frameworks/av/+/lollipop-release/media/libstagefright/NuMediaExtractor.cpp#474
vorbisNumPageSamples.setPosition(0);
output.sampleData(vorbisNumPageSamples, 4);
sampleBytesWritten += 4;
}
return finishWriteSampleData();
}
use of androidx.media3.extractor.Extractor in project media by androidx.
the class Ac3Extractor method sniff.
// Extractor implementation.
@Override
public boolean sniff(ExtractorInput input) throws IOException {
// Skip any ID3 headers.
ParsableByteArray scratch = new ParsableByteArray(ID3_HEADER_LENGTH);
int startPosition = 0;
while (true) {
input.peekFully(scratch.getData(), /* offset= */
0, ID3_HEADER_LENGTH);
scratch.setPosition(0);
if (scratch.readUnsignedInt24() != ID3_TAG) {
break;
}
// version, flags
scratch.skipBytes(3);
int length = scratch.readSynchSafeInt();
startPosition += 10 + length;
input.advancePeekPosition(length);
}
input.resetPeekPosition();
input.advancePeekPosition(startPosition);
int headerPosition = startPosition;
int validFramesCount = 0;
while (true) {
input.peekFully(scratch.getData(), 0, 6);
scratch.setPosition(0);
int syncBytes = scratch.readUnsignedShort();
if (syncBytes != AC3_SYNC_WORD) {
validFramesCount = 0;
input.resetPeekPosition();
if (++headerPosition - startPosition >= MAX_SNIFF_BYTES) {
return false;
}
input.advancePeekPosition(headerPosition);
} else {
if (++validFramesCount >= 4) {
return true;
}
int frameSize = Ac3Util.parseAc3SyncframeSize(scratch.getData());
if (frameSize == C.LENGTH_UNSET) {
return false;
}
input.advancePeekPosition(frameSize - 6);
}
}
}
use of androidx.media3.extractor.Extractor in project media by androidx.
the class SubtitleExtractor method decode.
/**
* Decodes the subtitle data and stores the samples in the memory of the extractor.
*/
private void decode() throws IOException {
try {
@Nullable SubtitleInputBuffer inputBuffer = subtitleDecoder.dequeueInputBuffer();
while (inputBuffer == null) {
Thread.sleep(5);
inputBuffer = subtitleDecoder.dequeueInputBuffer();
}
inputBuffer.ensureSpaceForWrite(bytesRead);
inputBuffer.data.put(subtitleData.getData(), /* offset= */
0, bytesRead);
inputBuffer.data.limit(bytesRead);
subtitleDecoder.queueInputBuffer(inputBuffer);
@Nullable SubtitleOutputBuffer outputBuffer = subtitleDecoder.dequeueOutputBuffer();
while (outputBuffer == null) {
Thread.sleep(5);
outputBuffer = subtitleDecoder.dequeueOutputBuffer();
}
for (int i = 0; i < outputBuffer.getEventTimeCount(); i++) {
List<Cue> cues = outputBuffer.getCues(outputBuffer.getEventTime(i));
byte[] cuesSample = cueEncoder.encode(cues);
timestamps.add(outputBuffer.getEventTime(i));
samples.add(new ParsableByteArray(cuesSample));
}
outputBuffer.release();
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
throw new InterruptedIOException();
} catch (SubtitleDecoderException e) {
throw ParserException.createForMalformedContainer("SubtitleDecoder failed.", e);
}
}
use of androidx.media3.extractor.Extractor in project media by androidx.
the class AmrExtractorSeekTest method seeking_handlesSeekingForward_extractsCorrectFrames_forNarrowBandAmr.
@Test
public void seeking_handlesSeekingForward_extractsCorrectFrames_forNarrowBandAmr() throws IOException {
String fileName = NARROW_BAND_AMR_FILE;
Uri fileUri = TestUtil.buildAssetUri(fileName);
expectedTrackOutput = TestUtil.extractAllSamplesFromFile(createAmrExtractor(), ApplicationProvider.getApplicationContext(), fileName).trackOutputs.get(0);
AmrExtractor extractor = createAmrExtractor();
FakeExtractorOutput extractorOutput = new FakeExtractorOutput();
SeekMap seekMap = TestUtil.extractSeekMap(extractor, extractorOutput, dataSource, fileUri);
FakeTrackOutput trackOutput = extractorOutput.trackOutputs.get(0);
long firstSeekTimeUs = 980_000;
TestUtil.seekToTimeUs(extractor, seekMap, firstSeekTimeUs, dataSource, trackOutput, fileUri);
long targetSeekTimeUs = 1_200_000;
int extractedFrameIndex = TestUtil.seekToTimeUs(extractor, seekMap, targetSeekTimeUs, dataSource, trackOutput, fileUri);
assertThat(extractedFrameIndex).isNotEqualTo(-1);
assertFirstFrameAfterSeekContainTargetSeekTime(trackOutput, targetSeekTimeUs, extractedFrameIndex);
}
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