CapturingAudioSink

Artifact: androidx.media3:media3-test-utils

Kotlin |Java

@UnstableApi
public final class CapturingAudioSink extends ForwardingAudioSink implements Dumper.Dumpable

java.lang.Object
↳	androidx.media3.exoplayer.audio.ForwardingAudioSink
	↳	androidx.media3.test.utils.CapturingAudioSink

A ForwardingAudioSink that captures configuration, discontinuity and buffer events.

Summary

Public constructors
`CapturingAudioSink(AudioSink sink)`

Public methods
`void`	`configure( Format inputFormat, int specifiedBufferSize, @Nullable int[] outputChannels )` Configures (or reconfigures) the sink.
`void`	`dump(Dumper dumper)` Dumps the fields of the object using the `dumper`.
`void`	`flush()` Flushes the sink, after which it is ready to receive buffers from a new playback position.
`boolean`	`handleBuffer( ByteBuffer buffer, long presentationTimeUs, int encodedAccessUnitCount )` Attempts to process data from a `ByteBuffer`, starting from its current position and ending at its limit (exclusive).
`void`	`handleDiscontinuity()` Signals to the sink that the next buffer may be discontinuous with the previous buffer.
`void`	`reset()` Resets the sink, releasing any resources that it currently holds.

Inherited Constants

From androidx.media3.exoplayer.audio.AudioSink

`static final long`	`CURRENT_POSITION_NOT_SET = -9223372036854775808` Returned by `getCurrentPositionUs` when the position is not set.
`static final int`	`OFFLOAD_MODE_DISABLED = 0` The audio sink will never play in offload mode.
`static final int`	`OFFLOAD_MODE_ENABLED_GAPLESS_NOT_REQUIRED = 2` The audio sink will prefer offload playback even if this might result in silence gaps between tracks.
`static final int`	`OFFLOAD_MODE_ENABLED_GAPLESS_REQUIRED = 1` The audio sink will prefer offload playback except in the case where both the track is gapless and the device does support gapless offload playback.
`static final int`	`SINK_FORMAT_SUPPORTED_DIRECTLY = 2` The sink supports the format directly, without the need for internal transcoding.
`static final int`	`SINK_FORMAT_SUPPORTED_WITH_TRANSCODING = 1` The sink supports the format, but needs to transcode it internally to do so.
`static final int`	`SINK_FORMAT_UNSUPPORTED = 0` The sink does not support the format.

Inherited methods

From androidx.media3.exoplayer.audio.AudioSink

abstract boolean

handleBuffer(
    ByteBuffer buffer,
    long presentationTimeUs,
    int encodedAccessUnitCount
)

Attempts to process data from a ByteBuffer, starting from its current position and ending at its limit (exclusive).

From androidx.media3.exoplayer.audio.ForwardingAudioSink

`void`	`disableTunneling()` Disables tunneling.
`void`	`enableTunnelingV21()` Enables tunneling, if possible.
`@Nullable AudioAttributes`	`getAudioAttributes()` Returns the audio attributes used for audio playback, or `null` if the sink does not use audio attributes.
`long`	`getCurrentPositionUs(boolean sourceEnded)` Returns the playback position in the stream starting at zero, in microseconds, or `CURRENT_POSITION_NOT_SET` if it is not yet available.
`AudioOffloadSupport`	`getFormatOffloadSupport(Format format)` Returns the level of offload support that the sink can provide for a given `Format`.
`int`	`@AudioSink.SinkFormatSupport getFormatSupport(Format format)` Returns the level of support that the sink provides for a given `Format`.
`PlaybackParameters`	`getPlaybackParameters()` Returns the active `PlaybackParameters`.
`boolean`	`getSkipSilenceEnabled()` Returns whether silences are skipped in the audio stream.
`boolean`	`hasPendingData()` Returns whether the sink has data pending that has not been consumed yet.
`boolean`	`isEnded()` Returns whether `playToEndOfStream` has been called and all buffers have been processed.
`void`	`pause()` Pauses playback.
`void`	`play()` Starts or resumes consuming audio if initialized.
`void`	`playToEndOfStream()` Processes any remaining data.
`void`	`release()` Releases the audio sink.
`void`	`setAudioAttributes(AudioAttributes audioAttributes)` Sets attributes for audio playback.
`void`	`setAudioSessionId(int audioSessionId)` Sets the audio session id.
`void`	`setAuxEffectInfo(AuxEffectInfo auxEffectInfo)` Sets the auxiliary effect.
`void`	`setClock(Clock clock)` Sets the `Clock` to use for timing in this audio sink.
`void`	`setListener(AudioSink.Listener listener)` Sets the listener for sink events, which should be the audio renderer.
`void`	`@RequiresApi(value = 29) setOffloadDelayPadding(int delayInFrames, int paddingInFrames)` Sets offload delay padding on the `AudioTrack`, if possible.
`void`	`@RequiresApi(value = 29) setOffloadMode(@AudioSink.OffloadMode int offloadMode)` Sets audio offload mode, if possible.
`void`	`setOutputStreamOffsetUs(long outputStreamOffsetUs)` Sets the offset that is added to the media timestamp before it is passed as `presentationTimeUs` in `handleBuffer`.
`void`	`setPlaybackParameters(PlaybackParameters playbackParameters)` Attempts to set the playback parameters.
`void`	`setPlayerId(@Nullable PlayerId playerId)` Sets the `PlayerId` of the player using this audio sink.
`void`	`@RequiresApi(value = 23) setPreferredDevice(@Nullable AudioDeviceInfo audioDeviceInfo)` Sets the preferred audio device.
`void`	`setSkipSilenceEnabled(boolean skipSilenceEnabled)` Sets whether silences should be skipped in the audio stream.
`void`	`setVolume(float volume)` Sets the playback volume.
`boolean`	`supportsFormat(Format format)` Returns whether the sink supports a given `Format`.

Public constructors

CapturingAudioSink

public CapturingAudioSink(AudioSink sink)

Public methods

configure

public void configure(
    Format inputFormat,
    int specifiedBufferSize,
    @Nullable int[] outputChannels
)

Configures (or reconfigures) the sink.

Parameters
`Format inputFormat`	The format of audio data provided in the input buffers.
`int specifiedBufferSize`	A specific size for the playback buffer in bytes, or 0 to infer a suitable buffer size.
`@Nullable int[] outputChannels`	A mapping from input to output channels that is applied to this sink's input as a preprocessing step, if handling PCM input. Specify `null` to leave the input unchanged. Otherwise, the element at index `i` specifies index of the input channel to map to output channel `i` when preprocessing input buffers. After the map is applied the audio data will have `outputChannels.length` channels.

Throws
`androidx.media3.exoplayer.audio.AudioSink.ConfigurationException`	If an error occurs configuring the sink.

dump

public void dump(Dumper dumper)

Dumps the fields of the object using the dumper.

Parameters
`Dumper dumper`	The `Dumper` to be used to dump fields.

flush

public void flush()

Flushes the sink, after which it is ready to receive buffers from a new playback position.

The audio session may remain active until reset is called.

handleBuffer

public boolean handleBuffer(
    ByteBuffer buffer,
    long presentationTimeUs,
    int encodedAccessUnitCount
)

Attempts to process data from a ByteBuffer, starting from its current position and ending at its limit (exclusive). The position of the ByteBuffer is advanced by the number of bytes that were handled. onPositionDiscontinuity will be called if presentationTimeUs is discontinuous with the last buffer handled since the last reset.

Returns whether the data was handled in full. If the data was not handled in full then the same ByteBuffer must be provided to subsequent calls until it has been fully consumed, except in the case of an intervening call to flush (or to configure that causes the sink to be flushed).

Parameters
`ByteBuffer buffer`	The buffer containing audio data.
`long presentationTimeUs`	The presentation timestamp of the buffer in microseconds.
`int encodedAccessUnitCount`	The number of encoded access units in the buffer, or 1 if the buffer contains PCM audio. This allows batching multiple encoded access units in one buffer.

Returns
`boolean`	Whether the buffer was handled fully.

Throws
`androidx.media3.exoplayer.audio.AudioSink.InitializationException`	If an error occurs initializing the sink.
`androidx.media3.exoplayer.audio.AudioSink.WriteException`	If an error occurs writing the audio data.

handleDiscontinuity

public void handleDiscontinuity()

Signals to the sink that the next buffer may be discontinuous with the previous buffer.

reset

public void reset()

Resets the sink, releasing any resources that it currently holds.