public class DefaultDashChunkSource extends Object implements DashChunkSource
DashChunkSource implementation.| Modifier and Type | Class and Description |
|---|---|
static class |
DefaultDashChunkSource.Factory |
protected static class |
DefaultDashChunkSource.RepresentationHolder
Holds information about a snapshot of a single
Representation. |
protected static class |
DefaultDashChunkSource.RepresentationSegmentIterator
|
| Modifier and Type | Field and Description |
|---|---|
protected DefaultDashChunkSource.RepresentationHolder[] |
representationHolders |
| Constructor and Description |
|---|
DefaultDashChunkSource(LoaderErrorThrower manifestLoaderErrorThrower,
DashManifest manifest,
int periodIndex,
int[] adaptationSetIndices,
TrackSelection trackSelection,
int trackType,
DataSource dataSource,
long elapsedRealtimeOffsetMs,
int maxSegmentsPerLoad,
boolean enableEventMessageTrack,
boolean enableCea608Track,
PlayerEmsgHandler.PlayerTrackEmsgHandler playerTrackEmsgHandler) |
| Modifier and Type | Method and Description |
|---|---|
long |
getAdjustedSeekPositionUs(long positionUs,
SeekParameters seekParameters)
Adjusts a seek position given the specified
SeekParameters. |
void |
getNextChunk(long playbackPositionUs,
long loadPositionUs,
List<? extends MediaChunk> queue,
ChunkHolder out)
Returns the next chunk to load.
|
int |
getPreferredQueueSize(long playbackPositionUs,
List<? extends MediaChunk> queue)
Evaluates whether
MediaChunks should be removed from the back of the queue. |
void |
maybeThrowError()
If the source is currently having difficulty providing chunks, then this method throws the
underlying error.
|
protected Chunk |
newInitializationChunk(DefaultDashChunkSource.RepresentationHolder representationHolder,
DataSource dataSource,
Format trackFormat,
int trackSelectionReason,
Object trackSelectionData,
RangedUri initializationUri,
RangedUri indexUri) |
protected Chunk |
newMediaChunk(DefaultDashChunkSource.RepresentationHolder representationHolder,
DataSource dataSource,
int trackType,
Format trackFormat,
int trackSelectionReason,
Object trackSelectionData,
long firstSegmentNum,
int maxSegmentCount,
long seekTimeUs) |
void |
onChunkLoadCompleted(Chunk chunk)
Called when the
ChunkSampleStream has finished loading a chunk obtained from this
source. |
boolean |
onChunkLoadError(Chunk chunk,
boolean cancelable,
Exception e,
long blacklistDurationMs)
Called when the
ChunkSampleStream encounters an error loading a chunk obtained from
this source. |
void |
updateManifest(DashManifest newManifest,
int newPeriodIndex)
Updates the manifest.
|
protected final DefaultDashChunkSource.RepresentationHolder[] representationHolders
public DefaultDashChunkSource(LoaderErrorThrower manifestLoaderErrorThrower, DashManifest manifest, int periodIndex, int[] adaptationSetIndices, TrackSelection trackSelection, int trackType, DataSource dataSource, long elapsedRealtimeOffsetMs, int maxSegmentsPerLoad, boolean enableEventMessageTrack, boolean enableCea608Track, @Nullable PlayerEmsgHandler.PlayerTrackEmsgHandler playerTrackEmsgHandler)
manifestLoaderErrorThrower - Throws errors affecting loading of manifests.manifest - The initial manifest.periodIndex - The index of the period in the manifest.adaptationSetIndices - The indices of the adaptation sets in the period.trackSelection - The track selection.trackType - The type of the tracks in the selection.dataSource - A DataSource suitable for loading the media data.elapsedRealtimeOffsetMs - If known, an estimate of the instantaneous difference between
server-side unix time and SystemClock.elapsedRealtime() in milliseconds, specified
as the server's unix time minus the local elapsed time. If unknown, set to 0.maxSegmentsPerLoad - The maximum number of segments to combine into a single request. Note
that segments will only be combined if their Uris are the same and if their data
ranges are adjacent.enableEventMessageTrack - Whether the chunks generated by the source may output an event
message track.enableCea608Track - Whether the chunks generated by the source may output a CEA-608 track.playerTrackEmsgHandler - The PlayerEmsgHandler.PlayerTrackEmsgHandler instance to handle emsg
messages targeting the player. Maybe null if this is not necessary.public long getAdjustedSeekPositionUs(long positionUs,
SeekParameters seekParameters)
ChunkSourceSeekParameters. Chunk boundaries are used
as sync points.getAdjustedSeekPositionUs in interface ChunkSourcepositionUs - The seek position in microseconds.seekParameters - Parameters that control how the seek is performed.public void updateManifest(DashManifest newManifest, int newPeriodIndex)
DashChunkSourceupdateManifest in interface DashChunkSourcenewManifest - The new manifest.public void maybeThrowError()
throws IOException
ChunkSourceThis method should only be called after the source has been prepared.
maybeThrowError in interface ChunkSourceIOException - The underlying error.public int getPreferredQueueSize(long playbackPositionUs,
List<? extends MediaChunk> queue)
ChunkSourceMediaChunks should be removed from the back of the queue.
Removing MediaChunks from the back of the queue can be useful if they could be replaced
with chunks of a significantly higher quality (e.g. because the available bandwidth has
substantially increased).
getPreferredQueueSize in interface ChunkSourceplaybackPositionUs - The current playback position.queue - The queue of buffered MediaChunks.public void getNextChunk(long playbackPositionUs,
long loadPositionUs,
List<? extends MediaChunk> queue,
ChunkHolder out)
ChunkSourceIf a chunk is available then ChunkHolder.chunk is set. If the end of the stream has
been reached then ChunkHolder.endOfStream is set. If a chunk is not available but the
end of the stream has not been reached, the ChunkHolder is not modified.
getNextChunk in interface ChunkSourceplaybackPositionUs - The current playback position in microseconds. If playback of the
period to which this chunk source belongs has not yet started, the value will be the
starting position in the period minus the duration of any media in previous periods still
to be played.loadPositionUs - The current load position in microseconds. If queue is empty,
this is the starting position from which chunks should be provided. Else it's equal to
Chunk.endTimeUs of the last chunk in the queue.queue - The queue of buffered MediaChunks.out - A holder to populate.public void onChunkLoadCompleted(Chunk chunk)
ChunkSourceChunkSampleStream has finished loading a chunk obtained from this
source.
This method should only be called when the source is enabled.
onChunkLoadCompleted in interface ChunkSourcechunk - The chunk whose load has been completed.public boolean onChunkLoadError(Chunk chunk, boolean cancelable, Exception e, long blacklistDurationMs)
ChunkSourceChunkSampleStream encounters an error loading a chunk obtained from
this source.
This method should only be called when the source is enabled.
onChunkLoadError in interface ChunkSourcechunk - The chunk whose load encountered the error.cancelable - Whether the load can be canceled.e - The error.blacklistDurationMs - The duration for which the associated track may be blacklisted, or
C.TIME_UNSET if the track may not be blacklisted.cancelable is false.protected Chunk newInitializationChunk(DefaultDashChunkSource.RepresentationHolder representationHolder, DataSource dataSource, Format trackFormat, int trackSelectionReason, Object trackSelectionData, RangedUri initializationUri, RangedUri indexUri)
protected Chunk newMediaChunk(DefaultDashChunkSource.RepresentationHolder representationHolder, DataSource dataSource, int trackType, Format trackFormat, int trackSelectionReason, Object trackSelectionData, long firstSegmentNum, int maxSegmentCount, long seekTimeUs)