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Add support for multiple subtitle tracks per PID and subtitle type identification

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This commit is contained in:
Sergio Moreno Mozota 2017-04-20 21:32:59 +02:00
parent da1b55ed4c
commit 3b7f47551c
5 changed files with 89 additions and 40 deletions
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2
library/core/src/androidTest/java/com/google/android/exoplayer2/extractor/ts/TsExtractorTest.java
View File

@ -156,7 +156,7 @@ public final class TsExtractorTest extends InstrumentationTestCase {
@Override
public TsPayloadReader createPayloadReader(int streamType, EsInfo esInfo) {
if (provideCustomEsReader && streamType == 3) {
esReader = new CustomEsReader(esInfo.language);
esReader = new CustomEsReader(esInfo.languagesInfo.get(0).languageCode);
return new PesReader(esReader);
} else {
return defaultFactory.createPayloadReader(streamType, esInfo);

10
library/core/src/main/java/com/google/android/exoplayer2/extractor/ts/DefaultTsPayloadReaderFactory.java
View File

@ -93,16 +93,16 @@ public final class DefaultTsPayloadReaderFactory implements TsPayloadReader.Fact
switch (streamType) {
case TsExtractor.TS_STREAM_TYPE_MPA:
case TsExtractor.TS_STREAM_TYPE_MPA_LSF:
return new PesReader(new MpegAudioReader(esInfo.language));
return new PesReader(new MpegAudioReader(esInfo.languagesInfo.get(0).languageCode));
case TsExtractor.TS_STREAM_TYPE_AAC:
return isSet(FLAG_IGNORE_AAC_STREAM)
? null : new PesReader(new AdtsReader(false, esInfo.language));
? null : new PesReader(new AdtsReader(false, esInfo.languagesInfo.get(0).languageCode));
case TsExtractor.TS_STREAM_TYPE_AC3:
case TsExtractor.TS_STREAM_TYPE_E_AC3:
return new PesReader(new Ac3Reader(esInfo.language));
return new PesReader(new Ac3Reader(esInfo.languagesInfo.get(0).languageCode));
case TsExtractor.TS_STREAM_TYPE_DTS:
case TsExtractor.TS_STREAM_TYPE_HDMV_DTS:
return new PesReader(new DtsReader(esInfo.language));
return new PesReader(new DtsReader(esInfo.languagesInfo.get(0).languageCode));
case TsExtractor.TS_STREAM_TYPE_H262:
return new PesReader(new H262Reader());
case TsExtractor.TS_STREAM_TYPE_H264:
@ -118,7 +118,7 @@ public final class DefaultTsPayloadReaderFactory implements TsPayloadReader.Fact
return new PesReader(new Id3Reader());
case TsExtractor.TS_STREAM_TYPE_DVBSUBS:
return new PesReader(
new DvbSubtitleReader(esInfo.language, esInfo.dvbSubtitleInitializationData));
new DvbSubtitleReader(esInfo));
default:
return null;
}

48
library/core/src/main/java/com/google/android/exoplayer2/extractor/ts/DvbSubtitleReader.java
View File

@ -20,9 +20,12 @@ import com.google.android.exoplayer2.Format;
import com.google.android.exoplayer2.extractor.ExtractorOutput;
import com.google.android.exoplayer2.extractor.TrackOutput;
import com.google.android.exoplayer2.extractor.ts.TsPayloadReader.TrackIdGenerator;
import com.google.android.exoplayer2.extractor.ts.TsPayloadReader.EsInfo;
import com.google.android.exoplayer2.extractor.ts.TsPayloadReader.LanguageInfo;
import com.google.android.exoplayer2.util.MimeTypes;
import com.google.android.exoplayer2.util.ParsableByteArray;
import java.util.Collections;
import java.util.ArrayList;
import java.util.List;
/**
@ -30,22 +33,19 @@ import java.util.List;
*/
public final class DvbSubtitleReader implements ElementaryStreamReader {
private final String language;
private final List<byte[]> initializationData;
private final List<LanguageInfo> languages;
private List<TrackOutput> outputTracks = new ArrayList<>();
private TrackOutput output;
private boolean writingSample;
private int bytesToCheck;
private int sampleBytesWritten;
private long sampleTimeUs;
/**
* @param language The subtitle language code.
* @param initializationData Initialization data to be included in the track {@link Format}.
* @param esInfo Information associated to the elementary stream.
*/
public DvbSubtitleReader(String language, byte[] initializationData) {
this.language = language;
this.initializationData = Collections.singletonList(initializationData);
public DvbSubtitleReader(EsInfo esInfo) {
this.languages = esInfo.languagesInfo;
}
@Override
@ -56,9 +56,24 @@ public final class DvbSubtitleReader implements ElementaryStreamReader {
@Override
public void createTracks(ExtractorOutput extractorOutput, TrackIdGenerator idGenerator) {
idGenerator.generateNewId();
this.output = extractorOutput.track(idGenerator.getTrackId(), C.TRACK_TYPE_TEXT);
TrackOutput output;
LanguageInfo language;
for (int i = 0; i < languages.size(); i++) {
language = languages.get(i);
idGenerator.generateNewId();
if (((language.programElementType & 0xF0 ) >> 4 ) == 2 ) {
language.languageCode += " for hard of hearing";
}
output = extractorOutput.track(idGenerator.getTrackId(), C.TRACK_TYPE_TEXT);
output.format(Format.createImageSampleFormat(idGenerator.getFormatId(),
MimeTypes.APPLICATION_DVBSUBS, null, Format.NO_VALUE, initializationData, language, null));
MimeTypes.APPLICATION_DVBSUBS, null, Format.NO_VALUE,
language.initializationData, language.languageCode, null));
outputTracks.add(output);
}
}
@Override
@ -75,7 +90,12 @@ public final class DvbSubtitleReader implements ElementaryStreamReader {
@Override
public void packetFinished() {
if (writingSample) {
TrackOutput output;
for (int i = 0; i < outputTracks.size(); i++) {
output = outputTracks.get(i);
output.sampleMetadata(sampleTimeUs, C.BUFFER_FLAG_KEY_FRAME, sampleBytesWritten, 0, null);
}
writingSample = false;
}
}
@ -92,7 +112,13 @@ public final class DvbSubtitleReader implements ElementaryStreamReader {
return;
}
int bytesAvailable = data.bytesLeft();
TrackOutput output;
int dataPosition = data.getPosition();
for (int i = 0; i < outputTracks.size(); i++) {
data.setPosition(dataPosition);
output = outputTracks.get(i);
output.sampleData(data, bytesAvailable);
}
sampleBytesWritten += bytesAvailable;
}
}

36
library/core/src/main/java/com/google/android/exoplayer2/extractor/ts/TsExtractor.java
View File

@ -29,6 +29,7 @@ import com.google.android.exoplayer2.extractor.SeekMap;
import com.google.android.exoplayer2.extractor.TrackOutput;
import com.google.android.exoplayer2.extractor.ts.DefaultTsPayloadReaderFactory.Flags;
import com.google.android.exoplayer2.extractor.ts.TsPayloadReader.EsInfo;
import com.google.android.exoplayer2.extractor.ts.TsPayloadReader.LanguageInfo;
import com.google.android.exoplayer2.extractor.ts.TsPayloadReader.TrackIdGenerator;
import com.google.android.exoplayer2.util.Assertions;
import com.google.android.exoplayer2.util.ParsableBitArray;
@ -418,7 +419,7 @@ public final class TsExtractor implements Extractor {
if (mode == MODE_HLS && id3Reader == null) {
// Setup an ID3 track regardless of whether there's a corresponding entry, in case one
// appears intermittently during playback. See [Internal: b/20261500].
EsInfo dummyEsInfo = new EsInfo(TS_STREAM_TYPE_ID3, null, null, new byte[0]);
EsInfo dummyEsInfo = new EsInfo(TS_STREAM_TYPE_ID3, null, new byte[0]);
id3Reader = payloadReaderFactory.createPayloadReader(TS_STREAM_TYPE_ID3, dummyEsInfo);
id3Reader.init(timestampAdjuster, output,
new TrackIdGenerator(programNumber, TS_STREAM_TYPE_ID3, MAX_PID_PLUS_ONE));
@ -487,8 +488,7 @@ public final class TsExtractor implements Extractor {
int descriptorsStartPosition = data.getPosition();
int descriptorsEndPosition = descriptorsStartPosition + length;
int streamType = -1;
String language = null;
byte[] dvbSubtitleInitializationData = null;
List<LanguageInfo> languages = null;
while (data.getPosition() < descriptorsEndPosition) {
int descriptorTag = data.readUnsignedByte();
int descriptorLength = data.readUnsignedByte();
@ -509,21 +509,35 @@ public final class TsExtractor implements Extractor {
} else if (descriptorTag == TS_PMT_DESC_DTS) { // DTS_descriptor
streamType = TS_STREAM_TYPE_DTS;
} else if (descriptorTag == TS_PMT_DESC_ISO639_LANG) {
language = new String(data.data, data.getPosition(), 3).trim();
// Audio type is ignored.
int position = data.getPosition();
languages = Collections.singletonList(
new LanguageInfo(new String(new byte[]
{data.data[position++], data.data[position++], data.data[position++]}).trim(),
data.data[position], null));
} else if (descriptorTag == TS_PMT_DESC_DVBSUBS) {
streamType = TS_STREAM_TYPE_DVBSUBS;
language = new String(data.data, data.getPosition(), 3).trim();
data.skipBytes(4); // Skip language (3) + subtitling_type (1)
// Init data: composition_page (2), ancillary_page (2)
dvbSubtitleInitializationData = new byte[4];
data.readBytes(dvbSubtitleInitializationData, 0, 4);
int position = data.getPosition();
String language;
byte programElementType;
byte[] buffer;
languages = new ArrayList<>();
while (position < positionOfNextDescriptor) {
buffer = new byte[4];
language = new String(new byte[]
{data.data[position++], data.data[position++], data.data[position++]}).trim();
programElementType = data.data[position++];
data.setPosition(position);
data.readBytes(buffer, 0,4);
languages.add(
new LanguageInfo(language, programElementType, Collections.singletonList(buffer)));
position += 4;
}
}
// Skip unused bytes of current descriptor.
data.skipBytes(positionOfNextDescriptor - data.getPosition());
}
data.setPosition(descriptorsEndPosition);
return new EsInfo(streamType, language, dvbSubtitleInitializationData,
return new EsInfo(streamType, languages,
Arrays.copyOfRange(data.data, descriptorsStartPosition, descriptorsEndPosition));
}

27
library/core/src/main/java/com/google/android/exoplayer2/extractor/ts/TsPayloadReader.java
View File

@ -21,6 +21,8 @@ import com.google.android.exoplayer2.extractor.TrackOutput;
import com.google.android.exoplayer2.util.ParsableByteArray;
import com.google.android.exoplayer2.util.TimestampAdjuster;
import java.util.List;
/**
* Parses TS packet payload data.
*/
@ -59,26 +61,33 @@ public interface TsPayloadReader {
final class EsInfo {
public final int streamType;
public final String language;
public final byte[] dvbSubtitleInitializationData;
public final List<LanguageInfo> languagesInfo;
public final byte[] descriptorBytes;
/**
* @param streamType The type of the stream as defined by the
* {@link TsExtractor}{@code .TS_STREAM_TYPE_*}.
* @param language The language of the stream, as defined by ISO/IEC 13818-1, section 2.6.18.
* @param dvbSubtitleInitializationData If the descriptors include a DVB subtitle tag, this is
* the corresponding decoder initialization data. Null otherwise.
* @param languagesInfo Language or languages info of the associated program element
* @param descriptorBytes The descriptor bytes associated to the stream.
*/
public EsInfo(int streamType, String language, byte[] dvbSubtitleInitializationData,
byte[] descriptorBytes) {
public EsInfo(int streamType, List<LanguageInfo> languagesInfo, byte[] descriptorBytes) {
this.streamType = streamType;
this.language = language;
this.dvbSubtitleInitializationData = dvbSubtitleInitializationData;
this.languagesInfo = languagesInfo;
this.descriptorBytes = descriptorBytes;
}
}
final class LanguageInfo {
public String languageCode;
public final byte programElementType;
public final List<byte[]> initializationData;
LanguageInfo (String languageCode, byte programElementType, List<byte[]> initializationData) {
this.languageCode = languageCode;
this.programElementType = programElementType;
this.initializationData = initializationData;
}
}
/**