sjs/media
1
0
Fork 0
mirror of https://github.com/samsonjs/media.git synced 2026-03-29 10:05:48 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Support multiple CC channels in DASH

Browse source 
Issue: #5656
PiperOrigin-RevId: 241235377
This commit is contained in:
olly 2019-03-31 23:40:58 +01:00 committed by Oliver Woodman
parent 5db33deef4
commit 592b5eafee
4 changed files with 148 additions and 78 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
RELEASENOTES.md
View file

@ -5,7 +5,10 @@
* Update to Mockito 2
* Add new `ExoPlaybackException` types for remote exceptions and out-of-memory
errors.
* DASH: Parse role and accessibility descriptors into `Format.roleFlags`.
* DASH:
* Parse role and accessibility descriptors into `Format.roleFlags`.
* Support multiple CEA-608 channels muxed into FMP4 representations
([#5656](https://github.com/google/ExoPlayer/issues/5656)).
* HLS:
* Work around lack of LA_URL attribute in PlayReady key request init data.
* Prevent unnecessary reloads of initialization segments.

10
library/dash/src/main/java/com/google/android/exoplayer2/source/dash/DashChunkSource.java
View file

@ -17,12 +17,14 @@ package com.google.android.exoplayer2.source.dash;
import android.os.SystemClock;
import androidx.annotation.Nullable;
import com.google.android.exoplayer2.Format;
import com.google.android.exoplayer2.source.chunk.ChunkSource;
import com.google.android.exoplayer2.source.dash.PlayerEmsgHandler.PlayerTrackEmsgHandler;
import com.google.android.exoplayer2.source.dash.manifest.DashManifest;
import com.google.android.exoplayer2.trackselection.TrackSelection;
import com.google.android.exoplayer2.upstream.LoaderErrorThrower;
import com.google.android.exoplayer2.upstream.TransferListener;
import java.util.List;
/**
* An {@link ChunkSource} for DASH streams.
@ -41,10 +43,8 @@ public interface DashChunkSource extends ChunkSource {
* @param elapsedRealtimeOffsetMs If known, an estimate of the instantaneous difference between
* server-side unix time and {@link SystemClock#elapsedRealtime()} in milliseconds,
* specified as the server's unix time minus the local elapsed time. If unknown, set to 0.
* @param enableEventMessageTrack Whether the chunks generated by the source may output an event
* message track.
* @param enableCea608Track Whether the chunks generated by the source may output a CEA-608
* track.
* @param enableEventMessageTrack Whether to output an event message track.
* @param closedCaptionFormats The {@link Format Formats} of closed caption tracks to be output.
* @param transferListener The transfer listener which should be informed of any data transfers.
* May be null if no listener is available.
* @return The created {@link DashChunkSource}.
@ -58,7 +58,7 @@ public interface DashChunkSource extends ChunkSource {
int type,
long elapsedRealtimeOffsetMs,
boolean enableEventMessageTrack,
boolean enableCea608Track,
List<Format> closedCaptionFormats,
@Nullable PlayerTrackEmsgHandler playerEmsgHandler,
@Nullable TransferListener transferListener);
}

185
library/dash/src/main/java/com/google/android/exoplayer2/source/dash/DashMediaPeriod.java
View file

@ -56,6 +56,8 @@ import java.util.ArrayList;
import java.util.Arrays;
import java.util.IdentityHashMap;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/** A DASH {@link MediaPeriod}. */
/* package */ final class DashMediaPeriod
@ -63,6 +65,8 @@ import java.util.List;
SequenceableLoader.Callback<ChunkSampleStream<DashChunkSource>>,
ChunkSampleStream.ReleaseCallback<DashChunkSource> {
private static final Pattern CEA608_SERVICE_DESCRIPTOR_REGEX = Pattern.compile("CC([1-4])=(.+)");
/* package */ final int id;
private final DashChunkSource.Factory chunkSourceFactory;
private final @Nullable TransferListener transferListener;
@ -457,18 +461,28 @@ import java.util.List;
int primaryGroupCount = groupedAdaptationSetIndices.length;
boolean[] primaryGroupHasEventMessageTrackFlags = new boolean[primaryGroupCount];
boolean[] primaryGroupHasCea608TrackFlags = new boolean[primaryGroupCount];
int totalEmbeddedTrackGroupCount = identifyEmbeddedTracks(primaryGroupCount, adaptationSets,
groupedAdaptationSetIndices, primaryGroupHasEventMessageTrackFlags,
primaryGroupHasCea608TrackFlags);
Format[][] primaryGroupCea608TrackFormats = new Format[primaryGroupCount][];
int totalEmbeddedTrackGroupCount =
identifyEmbeddedTracks(
primaryGroupCount,
adaptationSets,
groupedAdaptationSetIndices,
primaryGroupHasEventMessageTrackFlags,
primaryGroupCea608TrackFormats);
int totalGroupCount = primaryGroupCount + totalEmbeddedTrackGroupCount + eventStreams.size();
TrackGroup[] trackGroups = new TrackGroup[totalGroupCount];
TrackGroupInfo[] trackGroupInfos = new TrackGroupInfo[totalGroupCount];
int trackGroupCount = buildPrimaryAndEmbeddedTrackGroupInfos(adaptationSets,
groupedAdaptationSetIndices, primaryGroupCount, primaryGroupHasEventMessageTrackFlags,
primaryGroupHasCea608TrackFlags, trackGroups, trackGroupInfos);
int trackGroupCount =
buildPrimaryAndEmbeddedTrackGroupInfos(
adaptationSets,
groupedAdaptationSetIndices,
primaryGroupCount,
primaryGroupHasEventMessageTrackFlags,
primaryGroupCea608TrackFormats,
trackGroups,
trackGroupInfos);
buildManifestEventTrackGroupInfos(eventStreams, trackGroups, trackGroupInfos, trackGroupCount);
@ -524,39 +538,46 @@ import java.util.List;
/**
* Iterates through list of primary track groups and identifies embedded tracks.
* <p>
*
* @param primaryGroupCount The number of primary track groups.
* @param adaptationSets The list of {@link AdaptationSet} of the current DASH period.
* @param groupedAdaptationSetIndices The indices of {@link AdaptationSet} that belongs to
* the same primary group, grouped in primary track groups order.
* @param primaryGroupHasEventMessageTrackFlags An output array containing boolean flag, each
* indicates whether the corresponding primary track group contains an embedded event message
* track.
* @param primaryGroupHasCea608TrackFlags An output array containing boolean flag, each
* indicates whether the corresponding primary track group contains an embedded Cea608 track.
* @return Total number of embedded tracks.
* @param groupedAdaptationSetIndices The indices of {@link AdaptationSet} that belongs to the
* same primary group, grouped in primary track groups order.
* @param primaryGroupHasEventMessageTrackFlags An output array to be filled with flags indicating
* whether each of the primary track groups contains an embedded event message track.
* @param primaryGroupCea608TrackFormats An output array to be filled with track formats for
* CEA-608 tracks embedded in each of the primary track groups.
* @return Total number of embedded track groups.
*/
private static int identifyEmbeddedTracks(int primaryGroupCount,
List<AdaptationSet> adaptationSets, int[][] groupedAdaptationSetIndices,
boolean[] primaryGroupHasEventMessageTrackFlags, boolean[] primaryGroupHasCea608TrackFlags) {
int numEmbeddedTrack = 0;
private static int identifyEmbeddedTracks(
int primaryGroupCount,
List<AdaptationSet> adaptationSets,
int[][] groupedAdaptationSetIndices,
boolean[] primaryGroupHasEventMessageTrackFlags,
Format[][] primaryGroupCea608TrackFormats) {
int numEmbeddedTrackGroups = 0;
for (int i = 0; i < primaryGroupCount; i++) {
if (hasEventMessageTrack(adaptationSets, groupedAdaptationSetIndices[i])) {
primaryGroupHasEventMessageTrackFlags[i] = true;
numEmbeddedTrack++;
numEmbeddedTrackGroups++;
}
if (hasCea608Track(adaptationSets, groupedAdaptationSetIndices[i])) {
primaryGroupHasCea608TrackFlags[i] = true;
numEmbeddedTrack++;
primaryGroupCea608TrackFormats[i] =
getCea608TrackFormats(adaptationSets, groupedAdaptationSetIndices[i]);
if (primaryGroupCea608TrackFormats[i].length != 0) {
numEmbeddedTrackGroups++;
}
}
return numEmbeddedTrack;
return numEmbeddedTrackGroups;
}
private static int buildPrimaryAndEmbeddedTrackGroupInfos(List<AdaptationSet> adaptationSets,
int[][] groupedAdaptationSetIndices, int primaryGroupCount,
boolean[] primaryGroupHasEventMessageTrackFlags, boolean[] primaryGroupHasCea608TrackFlags,
TrackGroup[] trackGroups, TrackGroupInfo[] trackGroupInfos) {
private static int buildPrimaryAndEmbeddedTrackGroupInfos(
List<AdaptationSet> adaptationSets,
int[][] groupedAdaptationSetIndices,
int primaryGroupCount,
boolean[] primaryGroupHasEventMessageTrackFlags,
Format[][] primaryGroupCea608TrackFormats,
TrackGroup[] trackGroups,
TrackGroupInfo[] trackGroupInfos) {
int trackGroupCount = 0;
for (int i = 0; i < primaryGroupCount; i++) {
int[] adaptationSetIndices = groupedAdaptationSetIndices[i];
@ -574,7 +595,7 @@ import java.util.List;
int eventMessageTrackGroupIndex =
primaryGroupHasEventMessageTrackFlags[i] ? trackGroupCount++ : C.INDEX_UNSET;
int cea608TrackGroupIndex =
primaryGroupHasCea608TrackFlags[i] ? trackGroupCount++ : C.INDEX_UNSET;
primaryGroupCea608TrackFormats[i].length != 0 ? trackGroupCount++ : C.INDEX_UNSET;
trackGroups[primaryTrackGroupIndex] = new TrackGroup(formats);
trackGroupInfos[primaryTrackGroupIndex] =
@ -592,9 +613,7 @@ import java.util.List;
TrackGroupInfo.embeddedEmsgTrack(adaptationSetIndices, primaryTrackGroupIndex);
}
if (cea608TrackGroupIndex != C.INDEX_UNSET) {
Format format = Format.createTextSampleFormat(firstAdaptationSet.id + ":cea608",
MimeTypes.APPLICATION_CEA608, 0, null);
trackGroups[cea608TrackGroupIndex] = new TrackGroup(format);
trackGroups[cea608TrackGroupIndex] = new TrackGroup(primaryGroupCea608TrackFormats[i]);
trackGroupInfos[cea608TrackGroupIndex] =
TrackGroupInfo.embeddedCea608Track(adaptationSetIndices, primaryTrackGroupIndex);
}
@ -616,25 +635,39 @@ import java.util.List;
private ChunkSampleStream<DashChunkSource> buildSampleStream(TrackGroupInfo trackGroupInfo,
TrackSelection selection, long positionUs) {
int embeddedTrackCount = 0;
int[] embeddedTrackTypes = new int[2];
Format[] embeddedTrackFormats = new Format[2];
boolean enableEventMessageTrack =
trackGroupInfo.embeddedEventMessageTrackGroupIndex != C.INDEX_UNSET;
TrackGroup embeddedEventMessageTrackGroup = null;
if (enableEventMessageTrack) {
embeddedTrackFormats[embeddedTrackCount] =
trackGroups.get(trackGroupInfo.embeddedEventMessageTrackGroupIndex).getFormat(0);
embeddedTrackTypes[embeddedTrackCount++] = C.TRACK_TYPE_METADATA;
embeddedEventMessageTrackGroup =
trackGroups.get(trackGroupInfo.embeddedEventMessageTrackGroupIndex);
embeddedTrackCount++;
}
boolean enableCea608Track = trackGroupInfo.embeddedCea608TrackGroupIndex != C.INDEX_UNSET;
if (enableCea608Track) {
embeddedTrackFormats[embeddedTrackCount] =
trackGroups.get(trackGroupInfo.embeddedCea608TrackGroupIndex).getFormat(0);
embeddedTrackTypes[embeddedTrackCount++] = C.TRACK_TYPE_TEXT;
boolean enableCea608Tracks = trackGroupInfo.embeddedCea608TrackGroupIndex != C.INDEX_UNSET;
TrackGroup embeddedCea608TrackGroup = null;
if (enableCea608Tracks) {
embeddedCea608TrackGroup = trackGroups.get(trackGroupInfo.embeddedCea608TrackGroupIndex);
embeddedTrackCount += embeddedCea608TrackGroup.length;
}
if (embeddedTrackCount < embeddedTrackTypes.length) {
embeddedTrackFormats = Arrays.copyOf(embeddedTrackFormats, embeddedTrackCount);
embeddedTrackTypes = Arrays.copyOf(embeddedTrackTypes, embeddedTrackCount);
Format[] embeddedTrackFormats = new Format[embeddedTrackCount];
int[] embeddedTrackTypes = new int[embeddedTrackCount];
embeddedTrackCount = 0;
if (enableEventMessageTrack) {
embeddedTrackFormats[embeddedTrackCount] = embeddedEventMessageTrackGroup.getFormat(0);
embeddedTrackTypes[embeddedTrackCount] = C.TRACK_TYPE_METADATA;
embeddedTrackCount++;
}
List<Format> embeddedCea608TrackFormats = new ArrayList<>();
if (enableCea608Tracks) {
for (int i = 0; i < embeddedCea608TrackGroup.length; i++) {
embeddedTrackFormats[embeddedTrackCount] = embeddedCea608TrackGroup.getFormat(i);
embeddedTrackTypes[embeddedTrackCount] = C.TRACK_TYPE_TEXT;
embeddedCea608TrackFormats.add(embeddedTrackFormats[embeddedTrackCount]);
embeddedTrackCount++;
}
}
PlayerTrackEmsgHandler trackPlayerEmsgHandler =
manifest.dynamic && enableEventMessageTrack
? playerEmsgHandler.newPlayerTrackEmsgHandler()
@ -649,7 +682,7 @@ import java.util.List;
trackGroupInfo.trackType,
elapsedRealtimeOffsetMs,
enableEventMessageTrack,
enableCea608Track,
embeddedCea608TrackFormats,
trackPlayerEmsgHandler,
transferListener);
ChunkSampleStream<DashChunkSource> stream =
@ -694,18 +727,60 @@ import java.util.List;
return false;
}
private static boolean hasCea608Track(List<AdaptationSet> adaptationSets,
int[] adaptationSetIndices) {
private static Format[] getCea608TrackFormats(
List<AdaptationSet> adaptationSets, int[] adaptationSetIndices) {
for (int i : adaptationSetIndices) {
AdaptationSet adaptationSet = adaptationSets.get(i);
List<Descriptor> descriptors = adaptationSets.get(i).accessibilityDescriptors;
for (int j = 0; j < descriptors.size(); j++) {
Descriptor descriptor = descriptors.get(j);
if ("urn:scte:dash:cc:cea-608:2015".equals(descriptor.schemeIdUri)) {
return true;
String value = descriptor.value;
if (value == null) {
// There are embedded CEA-608 tracks, but service information is not declared.
return new Format[] {buildCea608TrackFormat(adaptationSet.id)};
}
String[] services = Util.split(value, ";");
Format[] formats = new Format[services.length];
for (int k = 0; k < services.length; k++) {
Matcher matcher = CEA608_SERVICE_DESCRIPTOR_REGEX.matcher(services[k]);
if (!matcher.matches()) {
// If we can't parse service information for all services, assume a single track.
return new Format[] {buildCea608TrackFormat(adaptationSet.id)};
}
formats[k] =
buildCea608TrackFormat(
adaptationSet.id,
/* language= */ matcher.group(2),
/* accessibilityChannel= */ Integer.parseInt(matcher.group(1)));
}
return formats;
}
}
}
return false;
return new Format[0];
}
private static Format buildCea608TrackFormat(int adaptationSetId) {
return buildCea608TrackFormat(
adaptationSetId, /* language= */ null, /* accessibilityChannel= */ Format.NO_VALUE);
}
private static Format buildCea608TrackFormat(
int adaptationSetId, String language, int accessibilityChannel) {
return Format.createTextSampleFormat(
adaptationSetId
+ ":cea608"
+ (accessibilityChannel != Format.NO_VALUE ? ":" + accessibilityChannel : ""),
MimeTypes.APPLICATION_CEA608,
/* codecs= */ null,
/* bitrate= */ Format.NO_VALUE,
/* selectionFlags= */ 0,
language,
accessibilityChannel,
/* drmInitData= */ null,
Format.OFFSET_SAMPLE_RELATIVE,
/* initializationData= */ null);
}
@SuppressWarnings("unchecked")
@ -761,7 +836,7 @@ import java.util.List;
primaryTrackGroupIndex,
embeddedEventMessageTrackGroupIndex,
embeddedCea608TrackGroupIndex,
-1);
/* eventStreamGroupIndex= */ -1);
}
public static TrackGroupInfo embeddedEmsgTrack(int[] adaptationSetIndices,
@ -773,7 +848,7 @@ import java.util.List;
primaryTrackGroupIndex,
C.INDEX_UNSET,
C.INDEX_UNSET,
-1);
/* eventStreamGroupIndex= */ -1);
}
public static TrackGroupInfo embeddedCea608Track(int[] adaptationSetIndices,
@ -785,7 +860,7 @@ import java.util.List;
primaryTrackGroupIndex,
C.INDEX_UNSET,
C.INDEX_UNSET,
-1);
/* eventStreamGroupIndex= */ -1);
}
public static TrackGroupInfo mpdEventTrack(int eventStreamIndex) {
@ -793,7 +868,7 @@ import java.util.List;
C.TRACK_TYPE_METADATA,
CATEGORY_MANIFEST_EVENTS,
new int[0],
-1,
/* primaryTrackGroupIndex= */ -1,
C.INDEX_UNSET,
C.INDEX_UNSET,
eventStreamIndex);

26
library/dash/src/main/java/com/google/android/exoplayer2/source/dash/DefaultDashChunkSource.java
View file

@ -54,7 +54,6 @@ import com.google.android.exoplayer2.util.MimeTypes;
import com.google.android.exoplayer2.util.Util;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
/**
@ -86,7 +85,7 @@ public class DefaultDashChunkSource implements DashChunkSource {
int trackType,
long elapsedRealtimeOffsetMs,
boolean enableEventMessageTrack,
boolean enableCea608Track,
List<Format> closedCaptionFormats,
@Nullable PlayerTrackEmsgHandler playerEmsgHandler,
@Nullable TransferListener transferListener) {
DataSource dataSource = dataSourceFactory.createDataSource();
@ -104,7 +103,7 @@ public class DefaultDashChunkSource implements DashChunkSource {
elapsedRealtimeOffsetMs,
maxSegmentsPerLoad,
enableEventMessageTrack,
enableCea608Track,
closedCaptionFormats,
playerEmsgHandler);
}
@ -141,9 +140,8 @@ public class DefaultDashChunkSource implements DashChunkSource {
* @param maxSegmentsPerLoad The maximum number of segments to combine into a single request. Note
* that segments will only be combined if their {@link Uri}s are the same and if their data
* ranges are adjacent.
* @param enableEventMessageTrack Whether the chunks generated by the source may output an event
* message track.
* @param enableCea608Track Whether the chunks generated by the source may output a CEA-608 track.
* @param enableEventMessageTrack Whether to output an event message track.
* @param closedCaptionFormats The {@link Format Formats} of closed caption tracks to be output.
* @param playerTrackEmsgHandler The {@link PlayerTrackEmsgHandler} instance to handle emsg
* messages targeting the player. Maybe null if this is not necessary.
*/
@ -158,7 +156,7 @@ public class DefaultDashChunkSource implements DashChunkSource {
long elapsedRealtimeOffsetMs,
int maxSegmentsPerLoad,
boolean enableEventMessageTrack,
boolean enableCea608Track,
List<Format> closedCaptionFormats,
@Nullable PlayerTrackEmsgHandler playerTrackEmsgHandler) {
this.manifestLoaderErrorThrower = manifestLoaderErrorThrower;
this.manifest = manifest;
@ -184,7 +182,7 @@ public class DefaultDashChunkSource implements DashChunkSource {
trackType,
representation,
enableEventMessageTrack,
enableCea608Track,
closedCaptionFormats,
playerTrackEmsgHandler);
}
}
@ -629,7 +627,7 @@ public class DefaultDashChunkSource implements DashChunkSource {
int trackType,
Representation representation,
boolean enableEventMessageTrack,
boolean enableCea608Track,
List<Format> closedCaptionFormats,
TrackOutput playerEmsgTrackOutput) {
this(
periodDurationUs,
@ -638,7 +636,7 @@ public class DefaultDashChunkSource implements DashChunkSource {
trackType,
representation,
enableEventMessageTrack,
enableCea608Track,
closedCaptionFormats,
playerEmsgTrackOutput),
/* segmentNumShift= */ 0,
representation.getIndex());
@ -783,7 +781,7 @@ public class DefaultDashChunkSource implements DashChunkSource {
int trackType,
Representation representation,
boolean enableEventMessageTrack,
boolean enableCea608Track,
List<Format> closedCaptionFormats,
TrackOutput playerEmsgTrackOutput) {
String containerMimeType = representation.format.containerMimeType;
if (mimeTypeIsRawText(containerMimeType)) {
@ -799,12 +797,6 @@ public class DefaultDashChunkSource implements DashChunkSource {
if (enableEventMessageTrack) {
flags |= FragmentedMp4Extractor.FLAG_ENABLE_EMSG_TRACK;
}
// TODO: Use caption format information from the manifest if available.
List<Format> closedCaptionFormats =
enableCea608Track
? Collections.singletonList(
Format.createTextSampleFormat(null, MimeTypes.APPLICATION_CEA608, 0, null))
: Collections.emptyList();
extractor =
new FragmentedMp4Extractor(
flags, null, null, null, closedCaptionFormats, playerEmsgTrackOutput);