com.google.android.exoplayer2.extractor.ts

Class Ac3Extractor

java.lang.Object

com.google.android.exoplayer2.extractor.ts.Ac3Extractor

All Implemented Interfaces:

Extractor

public final class Ac3Extractor
extends Object
implements Extractor

Facilitates the extraction of AC-3 samples from elementary audio files formatted as AC-3 bitstreams.

Field Summary

Fields

Modifier and Type	Field and Description
static ExtractorsFactory	FACTORY Factory for Ac3Extractor instances.

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

RESULT_CONTINUE, RESULT_END_OF_INPUT, RESULT_SEEK

Constructor Summary

Constructors

Constructor and Description
Ac3Extractor()
Ac3Extractor(long firstSampleTimestampUs)

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 Ac3Extractor instances.

Constructor Detail

Ac3Extractor

public Ac3Extractor()

Ac3Extractor

public Ac3Extractor(long firstSampleTimestampUs)

Method Detail

sniff

public boolean sniff(ExtractorInput input)
              throws IOException,
                     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:

IOException - If an error occurred reading from the input.

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 IOException,
                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:

IOException - If an error occurred reading from the input.

InterruptedException - If the thread was interrupted.