com.google.android.exoplayer2.extractor

Class ChunkIndex

java.lang.Object

com.google.android.exoplayer2.extractor.ChunkIndex

All Implemented Interfaces:

SeekMap

public final class ChunkIndex
extends java.lang.Object
implements SeekMap

Defines chunks of samples within a media stream.

Nested Class Summary

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

SeekMap.Unseekable

Field Summary

Fields

Modifier and Type	Field and Description
long[]	durationsUs The chunk durations, in microseconds.
int	length The number of chunks.
long[]	offsets The chunk byte offsets.
int[]	sizes The chunk sizes, in bytes.
long[]	timesUs The start time of each chunk, in microseconds.

Constructor Summary

Constructors

Constructor and Description
ChunkIndex(int[] sizes, long[] offsets, long[] durationsUs, long[] timesUs)

Method Summary

Modifier and Type	Method and Description
int	getChunkIndex(long timeUs) Obtains the index of the chunk corresponding to a given time.
long	getDurationUs() Returns the duration of the stream in microseconds.
long	getPosition(long timeUs) Maps a seek position in microseconds to a corresponding position (byte offset) in the stream from which data can be provided to the extractor.
boolean	isSeekable() Returns whether seeking is supported.

Methods inherited from class java.lang.Object

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

Field Detail

length

public final int length

The number of chunks.

sizes

public final int[] sizes

The chunk sizes, in bytes.

offsets

public final long[] offsets

The chunk byte offsets.

durationsUs

public final long[] durationsUs

The chunk durations, in microseconds.

timesUs

public final long[] timesUs

The start time of each chunk, in microseconds.

Constructor Detail

ChunkIndex

public ChunkIndex(int[] sizes,
                  long[] offsets,
                  long[] durationsUs,
                  long[] timesUs)

Parameters:

sizes - The chunk sizes, in bytes.

offsets - The chunk byte offsets.

durationsUs - The chunk durations, in microseconds.

timesUs - The start time of each chunk, in microseconds.

Method Detail

getChunkIndex

public int getChunkIndex(long timeUs)

Obtains the index of the chunk corresponding to a given time.

Parameters:

timeUs - The time, in microseconds.

Returns:

The index of the corresponding chunk.

isSeekable

public boolean isSeekable()

Description copied from interface: SeekMap

Returns whether seeking is supported.

If seeking is not supported then the only valid seek position is the start of the file, and so SeekMap.getPosition(long) will return 0 for all input values.

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.

getPosition

public long getPosition(long timeUs)

Description copied from interface: SeekMap

Maps a seek position in microseconds to a corresponding position (byte offset) in the stream from which data can be provided to the extractor.

Specified by:

getPosition in interface SeekMap

Parameters:

timeUs - A seek position in microseconds.

Returns:

The corresponding position (byte offset) in the stream from which data can be provided to the extractor, or 0 if #isSeekable() returns false.