com.google.android.exoplayer2.extractor.mp4

Class FragmentedMp4Extractor

java.lang.Object

com.google.android.exoplayer2.extractor.mp4.FragmentedMp4Extractor

All Implemented Interfaces:

Extractor

public final class FragmentedMp4Extractor
extends java.lang.Object
implements Extractor

Extracts data from the FMP4 container format.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	FragmentedMp4Extractor.Flags Flags controlling the behavior of the extractor.

Field Summary

Fields

Modifier and Type	Field and Description
static ExtractorsFactory	FACTORY Factory for FragmentedMp4Extractor instances.
static int	FLAG_ENABLE_EMSG_TRACK Flag to indicate that the extractor should output an event message metadata track.
static int	FLAG_WORKAROUND_EVERY_VIDEO_FRAME_IS_SYNC_FRAME Flag to work around an issue in some video streams where every frame is marked as a sync frame.
static int	FLAG_WORKAROUND_IGNORE_EDIT_LISTS Flag to ignore any edit lists in the stream.
static int	FLAG_WORKAROUND_IGNORE_TFDT_BOX Flag to ignore any tfdt boxes in the stream.

Fields inherited from interface com.google.android.exoplayer2.extractor.Extractor

RESULT_CONTINUE, RESULT_END_OF_INPUT, RESULT_SEEK

Constructor Summary

Constructors

Constructor and Description
FragmentedMp4Extractor()
FragmentedMp4Extractor(int flags)
FragmentedMp4Extractor(int flags, TimestampAdjuster timestampAdjuster)
FragmentedMp4Extractor(int flags, TimestampAdjuster timestampAdjuster, Track sideloadedTrack, DrmInitData sideloadedDrmInitData)
FragmentedMp4Extractor(int flags, TimestampAdjuster timestampAdjuster, Track sideloadedTrack, DrmInitData sideloadedDrmInitData, java.util.List<Format> closedCaptionFormats)
FragmentedMp4Extractor(int flags, TimestampAdjuster timestampAdjuster, Track sideloadedTrack, DrmInitData sideloadedDrmInitData, java.util.List<Format> closedCaptionFormats, TrackOutput additionalEmsgTrackOutput)

Method Summary

Modifier and Type	Method and Description
void	init(ExtractorOutput output) Initializes the extractor with an ExtractorOutput.
int	read(ExtractorInput input, PositionHolder seekPosition) Extracts data read from a provided ExtractorInput.
void	release() Releases all kept resources.
void	seek(long position, long timeUs) Notifies the extractor that a seek has occurred.
boolean	sniff(ExtractorInput input) Returns whether this extractor can extract samples from the ExtractorInput, which must provide data from the start of the stream.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

FACTORY

public static final ExtractorsFactory FACTORY

Factory for FragmentedMp4Extractor instances.

FLAG_WORKAROUND_EVERY_VIDEO_FRAME_IS_SYNC_FRAME

public static final int FLAG_WORKAROUND_EVERY_VIDEO_FRAME_IS_SYNC_FRAME

Flag to work around an issue in some video streams where every frame is marked as a sync frame. The workaround overrides the sync frame flags in the stream, forcing them to false except for the first sample in each segment.

This flag does nothing if the stream is not a video stream.

See Also:

Constant Field Values

FLAG_WORKAROUND_IGNORE_TFDT_BOX

public static final int FLAG_WORKAROUND_IGNORE_TFDT_BOX

Flag to ignore any tfdt boxes in the stream.

See Also:

Constant Field Values

FLAG_ENABLE_EMSG_TRACK

public static final int FLAG_ENABLE_EMSG_TRACK

Flag to indicate that the extractor should output an event message metadata track. Any event messages in the stream will be delivered as samples to this track.

See Also:

Constant Field Values

FLAG_WORKAROUND_IGNORE_EDIT_LISTS

public static final int FLAG_WORKAROUND_IGNORE_EDIT_LISTS

Flag to ignore any edit lists in the stream.

See Also:

Constant Field Values

Constructor Detail

FragmentedMp4Extractor

public FragmentedMp4Extractor()

FragmentedMp4Extractor

public FragmentedMp4Extractor(int flags)

Parameters:

flags - Flags that control the extractor's behavior.

FragmentedMp4Extractor

public FragmentedMp4Extractor(int flags,
                              TimestampAdjuster timestampAdjuster)

Parameters:

flags - Flags that control the extractor's behavior.

timestampAdjuster - Adjusts sample timestamps. May be null if no adjustment is needed.

FragmentedMp4Extractor

public FragmentedMp4Extractor(int flags,
                              TimestampAdjuster timestampAdjuster,
                              Track sideloadedTrack,
                              DrmInitData sideloadedDrmInitData)

Parameters:

flags - Flags that control the extractor's behavior.

timestampAdjuster - Adjusts sample timestamps. May be null if no adjustment is needed.

sideloadedTrack - Sideloaded track information, in the case that the extractor will not receive a moov box in the input data. Null if a moov box is expected.

sideloadedDrmInitData - The DrmInitData to use for encrypted tracks. If null, the pssh boxes (if present) will be used.

FragmentedMp4Extractor

public FragmentedMp4Extractor(int flags,
                              TimestampAdjuster timestampAdjuster,
                              Track sideloadedTrack,
                              DrmInitData sideloadedDrmInitData,
                              java.util.List<Format> closedCaptionFormats)

Parameters:

flags - Flags that control the extractor's behavior.

timestampAdjuster - Adjusts sample timestamps. May be null if no adjustment is needed.

sideloadedTrack - Sideloaded track information, in the case that the extractor will not receive a moov box in the input data. Null if a moov box is expected.

sideloadedDrmInitData - The DrmInitData to use for encrypted tracks. If null, the pssh boxes (if present) will be used.

closedCaptionFormats - For tracks that contain SEI messages, the formats of the closed caption channels to expose.

FragmentedMp4Extractor

public FragmentedMp4Extractor(int flags,
                              TimestampAdjuster timestampAdjuster,
                              Track sideloadedTrack,
                              DrmInitData sideloadedDrmInitData,
                              java.util.List<Format> closedCaptionFormats,
                              @Nullable
                              TrackOutput additionalEmsgTrackOutput)

Parameters:

flags - Flags that control the extractor's behavior.

timestampAdjuster - Adjusts sample timestamps. May be null if no adjustment is needed.

sideloadedTrack - Sideloaded track information, in the case that the extractor will not receive a moov box in the input data. Null if a moov box is expected.

sideloadedDrmInitData - The DrmInitData to use for encrypted tracks. If null, the pssh boxes (if present) will be used.

closedCaptionFormats - For tracks that contain SEI messages, the formats of the closed caption channels to expose.

additionalEmsgTrackOutput - An extra track output that will receive all emsg messages targeting the player, even if FLAG_ENABLE_EMSG_TRACK is not set. Null if special handling of emsg messages for players is not required.

Method Detail

sniff

public boolean sniff(ExtractorInput input)
              throws java.io.IOException,
                     java.lang.InterruptedException

Description copied from interface: Extractor

Returns whether this extractor can extract samples from the ExtractorInput, which must provide data from the start of the stream.

If true is returned, the input's reading position may have been modified. Otherwise, only its peek position may have been modified.

Specified by:

sniff in interface Extractor

Parameters:

input - The ExtractorInput from which data should be peeked/read.

Returns:

Whether this extractor can read the provided input.

Throws:

java.io.IOException - If an error occurred reading from the input.

java.lang.InterruptedException - If the thread was interrupted.

init

public void init(ExtractorOutput output)

Description copied from interface: Extractor

Initializes the extractor with an ExtractorOutput. Called at most once.

Specified by:

init in interface Extractor

Parameters:

output - An ExtractorOutput to receive extracted data.

seek

public void seek(long position,
                 long timeUs)

Description copied from interface: Extractor

Notifies the extractor that a seek has occurred.

Following a call to this method, the ExtractorInput passed to the next invocation of Extractor.read(ExtractorInput, PositionHolder) is required to provide data starting from position in the stream. Valid random access positions are the start of the stream and positions that can be obtained from any SeekMap passed to the ExtractorOutput.

Specified by:

seek in interface Extractor

Parameters:

position - The byte offset in the stream from which data will be provided.

timeUs - The seek time in microseconds.

release

public void release()

Description copied from interface: Extractor

Releases all kept resources.

Specified by:

release in interface Extractor

read

public int read(ExtractorInput input,
                PositionHolder seekPosition)
         throws java.io.IOException,
                java.lang.InterruptedException

Description copied from interface: Extractor

Extracts data read from a provided ExtractorInput. Must not be called before Extractor.init(ExtractorOutput).

A single call to this method will block until some progress has been made, but will not block for longer than this. Hence each call will consume only a small amount of input data.

In the common case, Extractor.RESULT_CONTINUE is returned to indicate that the ExtractorInput passed to the next read is required to provide data continuing from the position in the stream reached by the returning call. If the extractor requires data to be provided from a different position, then that position is set in seekPosition and Extractor.RESULT_SEEK is returned. If the extractor reached the end of the data provided by the ExtractorInput, then Extractor.RESULT_END_OF_INPUT is returned.

Specified by:

read in interface Extractor

Parameters:

input - The ExtractorInput from which data should be read.

seekPosition - If Extractor.RESULT_SEEK is returned, this holder is updated to hold the position of the required data.

Returns:

One of the RESULT_ values defined in this interface.

Throws:

java.io.IOException - If an error occurred reading from the input.

java.lang.InterruptedException - If the thread was interrupted.