com.google.android.exoplayer2.extractor.mp4

Class Mp4Extractor

java.lang.Object

com.google.android.exoplayer2.extractor.mp4.Mp4Extractor

All Implemented Interfaces:

Extractor, SeekMap

public final class Mp4Extractor
extends java.lang.Object
implements Extractor, SeekMap

Extracts data from the MP4 container format.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	Mp4Extractor.Flags Flags controlling the behavior of the extractor.

Nested classes/interfaces inherited from interface com.google.android.exoplayer2.extractor.Extractor

Extractor.ReadResult

Nested classes/interfaces inherited from interface com.google.android.exoplayer2.extractor.SeekMap

SeekMap.SeekPoints, SeekMap.Unseekable

Field Summary

Fields

Modifier and Type	Field and Description
static ExtractorsFactory	FACTORY Factory for Mp4Extractor instances.
static int	FLAG_WORKAROUND_IGNORE_EDIT_LISTS Flag to ignore any edit lists 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
Mp4Extractor() Creates a new extractor for unfragmented MP4 streams.
Mp4Extractor(int flags) Creates a new extractor for unfragmented MP4 streams, using the specified flags to control the extractor's behavior.

Method Summary

Modifier and Type	Method and Description
long	getDurationUs() Returns the duration of the stream in microseconds.
SeekMap.SeekPoints	getSeekPoints(long timeUs) Obtains seek points for the specified seek time in microseconds.
void	init(ExtractorOutput output) Initializes the extractor with an ExtractorOutput.
boolean	isSeekable() Returns whether seeking is supported.
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 Mp4Extractor instances.

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

Mp4Extractor

public Mp4Extractor()

Creates a new extractor for unfragmented MP4 streams.

Mp4Extractor

public Mp4Extractor(@Mp4Extractor.Flags
                    int flags)

Creates a new extractor for unfragmented MP4 streams, using the specified flags to control the extractor's behavior.

Parameters:

flags - Flags that control the extractor's behavior.

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.

isSeekable

public boolean isSeekable()

Description copied from interface: SeekMap

Returns whether seeking is supported.

Specified by:

isSeekable in interface SeekMap

Returns:

Whether seeking is supported.

getDurationUs

public long getDurationUs()

Description copied from interface: SeekMap

Returns the duration of the stream in microseconds.

Specified by:

getDurationUs in interface SeekMap

Returns:

The duration of the stream in microseconds, or C.TIME_UNSET if the duration is unknown.

getSeekPoints

public SeekMap.SeekPoints getSeekPoints(long timeUs)

Description copied from interface: SeekMap

Obtains seek points for the specified seek time in microseconds. The returned SeekMap.SeekPoints will contain one or two distinct seek points.

Two seek points [A, B] are returned in the case that seeking can only be performed to discrete points in time, there does not exist a seek point at exactly the requested time, and there exist seek points on both sides of it. In this case A and B are the closest seek points before and after the requested time. A single seek point is returned in all other cases.

Specified by:

getSeekPoints in interface SeekMap

Parameters:

timeUs - A seek time in microseconds.

Returns:

The corresponding seek points.