DecoderAudioRenderer

Artifact: androidx.media3:media3-exoplayer

Kotlin |Java

@UnstableApi
public abstract class DecoderAudioRenderer<T extends Decoder<DecoderInputBuffer, SimpleDecoderOutputBuffer, DecoderException>> extends BaseRenderer implements MediaClock, Decoder.Callback

java.lang.Object
↳	androidx.media3.exoplayer.BaseRenderer
	↳	androidx.media3.exoplayer.audio.DecoderAudioRenderer

Decodes and renders audio using a Decoder.

This renderer accepts the following messages sent via createMessage on the playback thread:

Message with type MSG_SET_VOLUME to set the volume. The message payload should be a Float with 0 being silence and 1 being unity gain.
Message with type MSG_SET_AUDIO_ATTRIBUTES to set the audio attributes. The message payload should be an AudioAttributes instance that will configure the underlying audio track.
Message with type MSG_SET_AUX_EFFECT_INFO to set the auxiliary effect. The message payload should be an AuxEffectInfo instance that will configure the underlying audio track.
Message with type MSG_SET_PREFERRED_AUDIO_DEVICE to set the preferred audio output device. The message payload should be an AudioDeviceInfo instance.
Message with type MSG_SET_VIRTUAL_DEVICE_ID to set the virtual device id. The message payload should be an Integer for the virtual device id or INDEX_UNSET if unspecified.
Message with type MSG_SET_SKIP_SILENCE_ENABLED to enable or disable skipping silences. The message payload should be a Boolean.
Message with type MSG_SET_AUDIO_SESSION_ID to set the audio session ID. The message payload should be a session ID Integer that will be attached to the underlying audio track.
Message with type MSG_SET_AUDIO_OUTPUT_PROVIDER to set the audio output provider. The message payload must be an AudioOutputProvider instance.

Summary

Public constructors
`DecoderAudioRenderer()`
`DecoderAudioRenderer( @Nullable Handler eventHandler, @Nullable AudioRendererEventListener eventListener, AudioProcessor[] audioProcessors )`
`DecoderAudioRenderer( @Nullable Handler eventHandler, @Nullable AudioRendererEventListener eventListener, AudioSink audioSink )`
`DecoderAudioRenderer( @Nullable Handler eventHandler, @Nullable AudioRendererEventListener eventListener, AudioCapabilities audioCapabilities, AudioProcessor[] audioProcessors )`

Public methods
`long`	`getDurationToProgressUs(long positionUs, long elapsedRealtimeUs)` Returns minimum amount of playback clock time that must pass from `elapsedRealtimeUs` in order for the `render` call to make progress.
`@Nullable MediaClock`	`getMediaClock()` If the renderer advances its own playback position then this method returns a corresponding `MediaClock`.
`PlaybackParameters`	`getPlaybackParameters()` Returns the active playback parameters.
`long`	`getPositionUs()` Returns the current media position in microseconds.
`void`	`handleMessage( @Renderer.MessageType int messageType, @Nullable Object message )` Handles a message delivered to the target.
`boolean`	`hasSkippedSilenceSinceLastCall()` Returns whether there is a skipped silence since the last call to this method.
`boolean`	`isEnded()` Whether the renderer is ready for the `ExoPlayer` instance to transition to `STATE_ENDED`.
`boolean`	`isReady()` Whether the renderer is able to immediately render media from the current position.
`void`	`onInputBufferAvailable()` Called when an input buffer becomes available to be dequeued.
`void`	`onOutputBufferAvailable()` Called when an output buffer becomes available to be dequeued.
`void`	`render(long positionUs, long elapsedRealtimeUs)` Incrementally renders the `SampleStream`.
`void`	`setPlaybackParameters(PlaybackParameters playbackParameters)` Attempts to set the playback parameters.
`final int`	`@RendererCapabilities.Capabilities supportsFormat(Format format)` Returns the extent to which the `Renderer` supports a given format.

Protected methods
`DecoderReuseEvaluation`	`@ForOverride canReuseDecoder(String decoderName, Format oldFormat, Format newFormat)` Evaluates whether the existing decoder can be reused for a new `Format`.
`abstract T`	`@ForOverride createDecoder(Format format, @Nullable CryptoConfig cryptoConfig)` Creates a decoder for the given format.
`@Nullable ImmutableIntArray`	`@ForOverride getChannelMapping(T decoder)` Returns the channel layout mapping that should be applied when sending this data to the output, or null to not change the channel layout.
`abstract Format`	`@ForOverride getOutputFormat(T decoder)` Returns the format of audio buffers output by the decoder.
`final int`	`@AudioSink.SinkFormatSupport getSinkFormatSupport(Format format)` Returns the level of support that the renderer's `AudioSink` provides for a given `Format`.
`final boolean`	`isReadyForDecoding()` Returns whether the renderer is ready to start or continue decoding.
`void`	`onDisabled()` Called when the renderer is disabled.
`void`	`onEnabled(boolean joining, boolean mayRenderStartOfStream)` Called when the renderer is enabled.
`void`	`@CallSuper @ForOverride onPositionDiscontinuity()` See `onPositionDiscontinuity`.
`void`	`onPositionReset( long positionUs, boolean joining, boolean sampleStreamIsResetToKeyFrame )` Called when the position is reset.
`void`	`onStarted()` Called when the renderer is started.
`void`	`onStopped()` Called when the renderer is stopped.
`void`	`onStreamChanged( Format[] formats, long startPositionUs, long offsetUs, MediaSource.MediaPeriodId mediaPeriodId )` Called when the renderer's stream has changed.
`final boolean`	`sinkSupportsFormat(Format format)` Returns whether the renderer's `AudioSink` supports a given `Format`.
`abstract int`	`@ForOverride @C.FormatSupport supportsFormatInternal(Format format)` Returns the `C.FormatSupport` for the given `Format`.

Inherited Constants

From androidx.media3.exoplayer.Renderer

`static final long`	`DEFAULT_DURATION_TO_PROGRESS_US = 10000` Default minimum duration that the playback clock must advance before `render` can make progress.
`static final long`	`DEFAULT_IDLE_DURATION_TO_PROGRESS_US = 1000000` Default duration to progress reported if the renderer does not need calls to `render` to progress, if it's in `STATE_ENABLED` and already `ready` or `ended`.
`static final int`	`MSG_CUSTOM_BASE = 10000` Applications or extensions may define custom `MSG_*` constants that can be passed to renderers.
`static final int`	`MSG_SET_AUDIO_ATTRIBUTES = 3` A type of a message that can be passed to an audio renderer via `createMessage`.
`static final int`	`MSG_SET_AUDIO_OUTPUT_PROVIDER = 20` The type of a message that can be passed to audio renderers via `createMessage`.
`static final int`	`MSG_SET_AUDIO_SESSION_ID = 10` The type of a message that can be passed to audio and video renderers via `createMessage`.
`static final int`	`MSG_SET_AUX_EFFECT_INFO = 6` A type of a message that can be passed to an audio renderer via `createMessage`.
`static final int`	`MSG_SET_CAMERA_MOTION_LISTENER = 8` The type of a message that can be passed to a camera motion renderer via `createMessage`.
`static final int`	`MSG_SET_CHANGE_FRAME_RATE_STRATEGY = 5` The type of a message that can be passed to a video renderer via `createMessage`.
`static final int`	`MSG_SET_CODEC_PARAMETERS = 21` The type of a message that can be passed to renderers via `createMessage`.
`static final int`	`MSG_SET_IMAGE_METADATA_LISTENER = 23` The type of a message that can be passed to an image renderer via `createMessage`.
`static final int`	`MSG_SET_IMAGE_OUTPUT = 15` The type of message that can be passed to an image renderer to set a desired image output.
`static final int`	`MSG_SET_PREFERRED_AUDIO_DEVICE = 12` The type of a message that can be passed to audio renderers via `createMessage`.
`static final int`	`MSG_SET_PRIORITY = 16` The type of message that can be passed to a renderer to set its priority.
`static final int`	`MSG_SET_SCALING_MODE = 4` The type of a message that can be passed to a `MediaCodec`-based video renderer via `createMessage`.
`static final int`	`MSG_SET_SCRUBBING_MODE = 18` The type of message that can be passed to a renderer to direct it to enable or disable scrubbing mode.
`static final int`	`MSG_SET_SKIP_SILENCE_ENABLED = 9` The type of a message that can be passed to an audio renderer via `createMessage`.
`static final int`	`MSG_SET_SUBSCRIBED_CODEC_PARAMETER_KEYS = 22` A message to set the keys for which a renderer should report parameter changes.
`static final int`	`MSG_SET_VIDEO_EFFECTS = 13` The type of a message that can be passed to a video renderer.
`static final int`	`MSG_SET_VIDEO_FRAME_METADATA_LISTENER = 7` The type of a message that can be passed to a video renderer via `createMessage`.
`static final int`	`MSG_SET_VIDEO_OUTPUT = 1` The type of a message that can be passed to a video renderer via `createMessage`.
`static final int`	`MSG_SET_VIDEO_OUTPUT_RESOLUTION = 14` The type of a message that can be passed to a video renderer to set the desired output resolution.
`static final int`	`MSG_SET_VIRTUAL_DEVICE_ID = 19` The type of a message that can be passed to audio renderers via `createMessage`.
`static final int`	`MSG_SET_VOLUME = 2` A type of a message that can be passed to an audio renderer via `createMessage`.
`static final int`	`MSG_SET_WAKEUP_LISTENER = 11` The type of a message that can be passed to a `Renderer` via `createMessage`, to inform the renderer that it can schedule waking up another component.
`static final int`	`MSG_TRANSFER_RESOURCES = 17` The type of message that can be passed to a renderer to direct it to transfer relevant resources to another renderer.
`static final int`	`STATE_DISABLED = 0` The renderer is disabled.
`static final int`	`STATE_ENABLED = 1` The renderer is enabled but not started.
`static final int`	`STATE_STARTED = 2` The renderer is started.

From androidx.media3.exoplayer.RendererCapabilities

`static final int`	`ADAPTIVE_NOT_SEAMLESS = 8` The `Renderer` can adapt between formats, but may suffer a brief discontinuity (~50-100ms) when adaptation occurs.
`static final int`	`ADAPTIVE_NOT_SUPPORTED = 0` The `Renderer` does not support adaptation between formats.
`static final int`	`ADAPTIVE_SEAMLESS = 16` The `Renderer` can seamlessly adapt between formats.
`static final int`	`ADAPTIVE_SUPPORT_MASK = 24` A mask to apply to `Capabilities` to obtain the `AdaptiveSupport` only.
`static final int`	`AUDIO_OFFLOAD_GAPLESS_SUPPORTED = 1024` The renderer supports audio offload and gapless transitions with this format.
`static final int`	`AUDIO_OFFLOAD_NOT_SUPPORTED = 0` Audio offload is not supported with this format.
`static final int`	`AUDIO_OFFLOAD_SPEED_CHANGE_SUPPORTED = 2048` The renderer supports audio offload and speed changes with this format.
`static final int`	`AUDIO_OFFLOAD_SUPPORTED = 512` The renderer supports audio offload with this format.
`static final int`	`AUDIO_OFFLOAD_SUPPORT_MASK = 3584` A mask to apply to `Capabilities` to obtain `AudioOffloadSupport` only.
`static final int`	`DECODER_SUPPORT_FALLBACK = 0` The format exceeds the primary decoder's capabilities but is supported by fallback decoder
`static final int`	`DECODER_SUPPORT_FALLBACK_MIMETYPE = 256` The format's MIME type is unsupported and the renderer may use a decoder for a fallback MIME type.
`static final int`	`DECODER_SUPPORT_MASK = 384` A mask to apply to `Capabilities` to obtain `DecoderSupport` only.
`static final int`	`DECODER_SUPPORT_PRIMARY = 128` The renderer is able to use the primary decoder for the format's MIME type.
`static final int`	`FORMAT_SUPPORT_MASK = 7` A mask to apply to `Capabilities` to obtain the `C.FormatSupport` only.
`static final int`	`HARDWARE_ACCELERATION_NOT_SUPPORTED = 0` The renderer is not able to use hardware acceleration.
`static final int`	`HARDWARE_ACCELERATION_SUPPORTED = 64` The renderer is able to use hardware acceleration.
`static final int`	`HARDWARE_ACCELERATION_SUPPORT_MASK = 64` A mask to apply to `Capabilities` to obtain `HardwareAccelerationSupport` only.
`static final int`	`TUNNELING_NOT_SUPPORTED = 0` The `Renderer` does not support tunneled output.
`static final int`	`TUNNELING_SUPPORTED = 32` The `Renderer` supports tunneled output.
`static final int`	`TUNNELING_SUPPORT_MASK = 32` A mask to apply to `Capabilities` to obtain `TunnelingSupport` only.

Inherited fields

From androidx.media3.exoplayer.BaseRenderer

`@MonotonicNonNull Clock`	`@MonotonicNonNull clock`
`@Nullable RendererConfiguration`	`configuration`
`final FormatHolder`	`formatHolder`
`int`	`index`
`long`	`lastResetPositionUs`
`@Nullable MediaSource.MediaPeriodId`	`mediaPeriodId`
`@MonotonicNonNull PlayerId`	`@MonotonicNonNull playerId`
`long`	`readingPositionUs`
`int`	`state`
`@Nullable SampleStream`	`stream`
`long`	`streamEndPositionUs`
`@Nullable Format[]`	`streamFormats`
`long`	`streamOffsetUs`
`Timeline`	`timeline`
`final int`	`@C.TrackType trackType`

Inherited methods

From androidx.media3.exoplayer.BaseRenderer

`final void`	`clearListener()` Clears the `Listener`.
`final ExoPlaybackException`	`createRendererException( Throwable cause, @Nullable Format format, @PlaybackException.ErrorCode int errorCode )` Creates an `ExoPlaybackException` of type `TYPE_RENDERER` for this renderer.
`final ExoPlaybackException`	`createRendererException( Throwable cause, @Nullable Format format, boolean isRecoverable, @PlaybackException.ErrorCode int errorCode )` Creates an `ExoPlaybackException` of type `TYPE_RENDERER` for this renderer.
`final void`	`disable()` Disable the renderer, transitioning it to the `STATE_DISABLED` state.
`final void`	`enable( RendererConfiguration configuration, Format[] formats, SampleStream stream, long positionUs, boolean joining, boolean mayRenderStartOfStream, long startPositionUs, long offsetUs, MediaSource.MediaPeriodId mediaPeriodId )` Enables the renderer to consume from the specified `SampleStream`.
`final RendererCapabilities`	`getCapabilities()` Returns the capabilities of the renderer.
`final Clock`	`getClock()` Returns the `Clock`.
`final RendererConfiguration`	`getConfiguration()` Returns the configuration set when the renderer was most recently enabled.
`final FormatHolder`	`getFormatHolder()` Returns a clear `FormatHolder`.
`final int`	`getIndex()` Returns the index of the renderer within the player.
`final long`	`getLastResetPositionUs()` Returns the position passed to the most recent call to `enable` or resetPosition.
`final @Nullable MediaSource.MediaPeriodId`	`getMediaPeriodId()` The `MediaSource.MediaPeriodId` of the `MediaPeriod` producing the `stream`, or `null` if the renderer is disabled.
`final PlayerId`	`getPlayerId()` Returns the `PlayerId` of the player using this renderer.
`final long`	`getReadingPositionUs()` Returns the renderer time up to which the renderer has read samples, in microseconds, or `TIME_END_OF_SOURCE` if the renderer has read the current `SampleStream` to the end.
`final int`	`getState()` Returns the current state of the renderer.
`final @Nullable SampleStream`	`getStream()` Returns the `SampleStream` being consumed, or null if the renderer is disabled.
`final long`	`getStreamEndPositionUs()` Returns the end position of the content or ad period producing the stream, in microseconds, or `TIME_UNSET` if unknown.
`final Format[]`	`getStreamFormats()` Returns the formats of the currently enabled stream.
`final long`	`getStreamOffsetUs()` Returns the offset added to timestamps of buffers read from the `SampleStream`.
`final Timeline`	`getTimeline()` Returns the current `Timeline` containing the rendered stream.
`final int`	`@C.TrackType getTrackType()` Returns the track type that the renderer handles.
`final boolean`	`hasReadStreamToEnd()` Returns whether the renderer has read the current `SampleStream` to the end.
`final void`	`init(int index, PlayerId playerId, Clock clock)` Initializes the renderer for playback with a player.
`final boolean`	`isCurrentStreamFinal()` Returns whether the current `SampleStream` will be the final one supplied before the renderer is next disabled or reset.
`final boolean`	`isSourceReady()` Returns whether the upstream source is ready.
`final void`	`maybeThrowStreamError()` Throws an error that's preventing the renderer from reading from its `SampleStream`.
`void`	`onInit()` Called when the renderer is initialized.
`void`	`onRelease()` Called when the renderer is released.
`final void`	`onRendererCapabilitiesChanged()` Called when the renderer capabilities are changed.
`void`	`onReset()` Called when the renderer is reset.
`void`	`onTimelineChanged(Timeline timeline)` Called when a new timeline is `set`.
`final int`	`@SampleStream.ReadDataResult readSource( FormatHolder formatHolder, DecoderInputBuffer buffer, @SampleStream.ReadFlags int readFlags )` Reads from the enabled upstream source.
`final void`	`release()` Releases the renderer.
`final void`	`replaceStream( Format[] formats, SampleStream stream, long startPositionUs, long offsetUs, MediaSource.MediaPeriodId mediaPeriodId )` Replaces the `SampleStream` from which samples will be consumed.
`final void`	`reset()` Forces the renderer to give up any resources (e.g. media decoders) that it may be holding.
`final void`	`resetPosition(long positionUs, boolean sampleStreamIsResetToKeyFrame)` Signals to the renderer that a position discontinuity has occurred.
`final void`	`setCurrentStreamFinal()` Signals to the renderer that the current `SampleStream` will be the final one supplied before it is next disabled or reset.
`final void`	`setListener(RendererCapabilities.Listener listener)` Sets the `Listener`.
`final void`	`setTimeline(Timeline timeline)` Sets the timeline that is currently being played.
`int`	`skipSource(long positionUs)` Attempts to skip to the keyframe before the specified position, or to the end of the stream if `positionUs` is beyond it.
`final void`	`start()` Starts the renderer, meaning that calls to `render` will cause media to be rendered.
`final void`	`stop()` Stops the renderer, transitioning it to the `STATE_ENABLED` state.
`int`	`@RendererCapabilities.AdaptiveSupport supportsMixedMimeTypeAdaptation()` Returns the extent to which the `Renderer` supports adapting between supported formats that have different MIME types.

From androidx.media3.exoplayer.Renderer

`abstract void`	`enable( RendererConfiguration configuration, Format[] formats, SampleStream stream, long positionUs, boolean joining, boolean mayRenderStartOfStream, long startPositionUs, long offsetUs, MediaSource.MediaPeriodId mediaPeriodId )` Enables the renderer to consume from the specified `SampleStream`.
`void`	`enableMayRenderStartOfStream()` Enables this renderer to render the start of the stream even if the state is not `STATE_STARTED` yet.
`abstract String`	`getName()` Returns the name of this renderer, for logging and debugging purposes.
`abstract void`	`replaceStream( Format[] formats, SampleStream stream, long startPositionUs, long offsetUs, MediaSource.MediaPeriodId mediaPeriodId )` Replaces the `SampleStream` from which samples will be consumed.
`void`	`setPlaybackSpeed(float currentPlaybackSpeed, float targetPlaybackSpeed)` Indicates the playback speed to this renderer.
`boolean`	`supportsResetPositionWithoutKeyFrameReset(long positionUs)` Returns whether the renderer can support processing a position discontinuity without a key frame reset.

From androidx.media3.exoplayer.RendererCapabilities

`static int`	`@RendererCapabilities.Capabilities create(@C.FormatSupport int formatSupport)` Returns `Capabilities` for the given `C.FormatSupport`.
`static int`	`@RendererCapabilities.Capabilities create( @C.FormatSupport int formatSupport, @RendererCapabilities.AdaptiveSupport int adaptiveSupport, @RendererCapabilities.TunnelingSupport int tunnelingSupport )` Returns `Capabilities` combining the given `C.FormatSupport`, `AdaptiveSupport` and `TunnelingSupport`.
`static int`	`@RendererCapabilities.Capabilities create( @C.FormatSupport int formatSupport, @RendererCapabilities.AdaptiveSupport int adaptiveSupport, @RendererCapabilities.TunnelingSupport int tunnelingSupport, @RendererCapabilities.AudioOffloadSupport int audioOffloadSupport )` Returns `Capabilities` combining the given `C.FormatSupport`, `AdaptiveSupport`, `TunnelingSupport`, and `AudioOffloadSupport`.
`static int`	`@RendererCapabilities.Capabilities create( @C.FormatSupport int formatSupport, @RendererCapabilities.AdaptiveSupport int adaptiveSupport, @RendererCapabilities.TunnelingSupport int tunnelingSupport, @RendererCapabilities.HardwareAccelerationSupport int hardwareAccelerationSupport, @RendererCapabilities.DecoderSupport int decoderSupport )` Returns `Capabilities` combining the given `C.FormatSupport`, `AdaptiveSupport`, `TunnelingSupport`, `HardwareAccelerationSupport`, and `DecoderSupport`.
`static int`	`@RendererCapabilities.Capabilities create( @C.FormatSupport int formatSupport, @RendererCapabilities.AdaptiveSupport int adaptiveSupport, @RendererCapabilities.TunnelingSupport int tunnelingSupport, @RendererCapabilities.HardwareAccelerationSupport int hardwareAccelerationSupport, @RendererCapabilities.DecoderSupport int decoderSupport, @RendererCapabilities.AudioOffloadSupport int audioOffloadSupport )` Returns `Capabilities` combining the given `C.FormatSupport`, `AdaptiveSupport`, `TunnelingSupport`, `HardwareAccelerationSupport`, `DecoderSupport` and `AudioOffloadSupport`.
`static int`	`@RendererCapabilities.AdaptiveSupport getAdaptiveSupport(@RendererCapabilities.Capabilities int supportFlags)` Returns the `AdaptiveSupport` from the combined `Capabilities`.
`static int`	`@RendererCapabilities.AudioOffloadSupport getAudioOffloadSupport( @RendererCapabilities.Capabilities int supportFlags )` Returns the `AudioOffloadSupport` from the combined `Capabilities`.
`static int`	`@RendererCapabilities.DecoderSupport getDecoderSupport(@RendererCapabilities.Capabilities int supportFlags)` Returns the `DecoderSupport` from the combined `Capabilities`.
`static int`	`@C.FormatSupport getFormatSupport(@RendererCapabilities.Capabilities int supportFlags)` Returns the `C.FormatSupport` from the combined `Capabilities`.
`static int`	`@RendererCapabilities.HardwareAccelerationSupport getHardwareAccelerationSupport( @RendererCapabilities.Capabilities int supportFlags )` Returns the `HardwareAccelerationSupport` from the combined `Capabilities`.
`static int`	`@RendererCapabilities.TunnelingSupport getTunnelingSupport(@RendererCapabilities.Capabilities int supportFlags)` Returns the `TunnelingSupport` from the combined `Capabilities`.
`static boolean`	`isFormatSupported( @RendererCapabilities.Capabilities int supportFlags, boolean allowExceedsCapabilities )` Returns whether the `C.FormatSupport` from the combined `Capabilities` indicates the format is supported.
`void`	`setListener(RendererCapabilities.Listener listener)` Sets the `Listener`.

Public constructors

DecoderAudioRenderer

public DecoderAudioRenderer()

DecoderAudioRenderer

public DecoderAudioRenderer(
    @Nullable Handler eventHandler,
    @Nullable AudioRendererEventListener eventListener,
    AudioProcessor[] audioProcessors
)

Parameters
`@Nullable Handler eventHandler`	A handler to use when delivering events to `eventListener`. May be null if delivery of events is not required.
`@Nullable AudioRendererEventListener eventListener`	A listener of events. May be null if delivery of events is not required.
`AudioProcessor[] audioProcessors`	Optional `AudioProcessor`s that will process audio before output.

DecoderAudioRenderer

public DecoderAudioRenderer(
    @Nullable Handler eventHandler,
    @Nullable AudioRendererEventListener eventListener,
    AudioSink audioSink
)

Parameters
`@Nullable Handler eventHandler`	A handler to use when delivering events to `eventListener`. May be null if delivery of events is not required.
`@Nullable AudioRendererEventListener eventListener`	A listener of events. May be null if delivery of events is not required.
`AudioSink audioSink`	The sink to which audio will be output.

DecoderAudioRenderer

public DecoderAudioRenderer(
    @Nullable Handler eventHandler,
    @Nullable AudioRendererEventListener eventListener,
    AudioCapabilities audioCapabilities,
    AudioProcessor[] audioProcessors
)

Parameters
`@Nullable Handler eventHandler`	A handler to use when delivering events to `eventListener`. May be null if delivery of events is not required.
`@Nullable AudioRendererEventListener eventListener`	A listener of events. May be null if delivery of events is not required.
`AudioCapabilities audioCapabilities`	The audio capabilities for playback on this device. Use `DEFAULT_AUDIO_CAPABILITIES` if default capabilities (no encoded audio passthrough support) should be assumed.
`AudioProcessor[] audioProcessors`	Optional `AudioProcessor`s that will process audio before output.

Public methods

getDurationToProgressUs

public long getDurationToProgressUs(long positionUs, long elapsedRealtimeUs)

Returns minimum amount of playback clock time that must pass from elapsedRealtimeUs in order for the render call to make progress.

This method may be called when the renderer is in the following states: STATE_ENABLED, STATE_STARTED.

The default return time is DEFAULT_DURATION_TO_PROGRESS_US if the renderer is in STATE_STARTED, or in STATE_ENABLED and not yet ready or ended. Otherwise, it returns DEFAULT_IDLE_DURATION_TO_PROGRESS_US.

Parameters
`long positionUs`	The current render position in microseconds, measured at the start of the current iteration of the rendering loop.
`long elapsedRealtimeUs`	`elapsedRealtime` in microseconds, measured at the start of the current iteration of the rendering loop.

Returns
`long`	Minimum amount of playback clock time that must pass before renderer is able to make progress.

getMediaClock

public @Nullable MediaClock getMediaClock()

If the renderer advances its own playback position then this method returns a corresponding MediaClock. If provided, the player will use the returned MediaClock as its source of time during playback. A player may have at most one renderer that returns a MediaClock from this method.

Returns
`@Nullable MediaClock`	The `MediaClock` tracking the playback position of the renderer, or null.

getPlaybackParameters

public PlaybackParameters getPlaybackParameters()

Returns the active playback parameters.

getPositionUs

public long getPositionUs()

Returns the current media position in microseconds.

handleMessage

public void handleMessage(
    @Renderer.MessageType int messageType,
    @Nullable Object message
)

Handles a message delivered to the target.

Parameters
`@Renderer.MessageType int messageType`	The message type.
`@Nullable Object message`	The message payload.

Throws
`androidx.media3.exoplayer.ExoPlaybackException`	If an error occurred whilst handling the message. Should only be thrown by targets that handle messages on the playback thread.

hasSkippedSilenceSinceLastCall

public boolean hasSkippedSilenceSinceLastCall()

Returns whether there is a skipped silence since the last call to this method.

isEnded

public boolean isEnded()

Whether the renderer is ready for the ExoPlayer instance to transition to STATE_ENDED. The player will make this transition as soon as true is returned by all of its renderers.

This method may be called when the renderer is in the following states: STATE_ENABLED, STATE_STARTED.

Returns
`boolean`	Whether the renderer is ready for the player to transition to the ended state.

isReady

public boolean isReady()

Whether the renderer is able to immediately render media from the current position.

If the renderer is in the STATE_STARTED state then returning true indicates that the renderer has everything that it needs to continue playback. Returning false indicates that the player should pause until the renderer is ready.

If the renderer is in the STATE_ENABLED state then returning true indicates that the renderer is ready for playback to be started. Returning false indicates that it is not.

This method may be called when the renderer is in the following states: STATE_ENABLED, STATE_STARTED.

Returns
`boolean`	Whether the renderer is ready to render media.

onInputBufferAvailable

public void onInputBufferAvailable()

Called when an input buffer becomes available to be dequeued.

onOutputBufferAvailable

public void onOutputBufferAvailable()

Called when an output buffer becomes available to be dequeued.

render

public void render(long positionUs, long elapsedRealtimeUs)

Incrementally renders the SampleStream.

If the renderer is in the STATE_ENABLED state then each call to this method will do work toward being ready to render the SampleStream when the renderer is started. If the renderer is in the STATE_STARTED state then calls to this method will render the SampleStream in sync with the specified media positions.

The renderer may also render the very start of the media at the current position (e.g. the first frame of a video stream) while still in the STATE_ENABLED state, unless it's the initial start of the media after calling enable with mayRenderStartOfStream set to false.

This method should return quickly, and should not block if the renderer is unable to make useful progress.

This method may be called when the renderer is in the following states: STATE_ENABLED, STATE_STARTED.

Parameters
`long positionUs`	The current media time in microseconds, measured at the start of the current iteration of the rendering loop.
`long elapsedRealtimeUs`	`elapsedRealtime` in microseconds, measured at the start of the current iteration of the rendering loop.

Throws
`androidx.media3.exoplayer.ExoPlaybackException`	If an error occurs.

setPlaybackParameters

public void setPlaybackParameters(PlaybackParameters playbackParameters)

Attempts to set the playback parameters. The media clock may override the speed if changing the playback parameters is not supported.

Parameters
`PlaybackParameters playbackParameters`	The playback parameters to attempt to set.

supportsFormat

@RendererCapabilities.Capabilities
public final int supportsFormat(Format format)

Returns the extent to which the Renderer supports a given format.

Parameters
`Format format`	The format.

Returns
`int`	The `Capabilities` for this format.

Throws
`androidx.media3.exoplayer.ExoPlaybackException`	If an error occurs.

Protected methods

canReuseDecoder

@ForOverride
protected DecoderReuseEvaluation canReuseDecoder(String decoderName, Format oldFormat, Format newFormat)

Evaluates whether the existing decoder can be reused for a new Format.

The default implementation does not allow decoder reuse.

Parameters
`String decoderName`	The name of the decoder.
`Format oldFormat`	The previous format.
`Format newFormat`	The new format.

Returns
`DecoderReuseEvaluation`	The result of the evaluation.

createDecoder

@ForOverride
protected abstract T createDecoder(Format format, @Nullable CryptoConfig cryptoConfig)

Creates a decoder for the given format.

Parameters
`Format format`	The format for which a decoder is required.
`@Nullable CryptoConfig cryptoConfig`	The `CryptoConfig` object required for decoding encrypted content. May be null and can be ignored if decoder does not handle encrypted content.

Returns
`T`	The decoder.

Throws
`androidx.media3.decoder.DecoderException`	If an error occurred creating a suitable decoder.

getChannelMapping

@ForOverride
protected @Nullable ImmutableIntArray getChannelMapping(T decoder)

Returns the channel layout mapping that should be applied when sending this data to the output, or null to not change the channel layout.

Parameters
`T decoder`	The decoder.

getOutputFormat

@ForOverride
protected abstract Format getOutputFormat(T decoder)

Returns the format of audio buffers output by the decoder. Will not be called until the first output buffer has been dequeued, so the decoder may use input data to determine the format.

Parameters
`T decoder`	The decoder.

getSinkFormatSupport

@AudioSink.SinkFormatSupport
protected final int getSinkFormatSupport(Format format)

Returns the level of support that the renderer's AudioSink provides for a given Format.

See also
`getFormatSupport`	(Format)

isReadyForDecoding

protected final boolean isReadyForDecoding()

Returns whether the renderer is ready to start or continue decoding.

onDisabled

protected void onDisabled()

Called when the renderer is disabled.

The default implementation is a no-op.

onEnabled

protected void onEnabled(boolean joining, boolean mayRenderStartOfStream)

Called when the renderer is enabled.

The default implementation is a no-op.

Parameters
`boolean joining`	Whether this renderer is being enabled to join an ongoing playback.
`boolean mayRenderStartOfStream`	Whether this renderer is allowed to render the start of the stream even if the state is not `STATE_STARTED` yet.

Throws
`androidx.media3.exoplayer.ExoPlaybackException`	If an error occurs.

onPositionDiscontinuity

@CallSuper
@ForOverride
protected void onPositionDiscontinuity()

See onPositionDiscontinuity.

onPositionReset

protected void onPositionReset(
    long positionUs,
    boolean joining,
    boolean sampleStreamIsResetToKeyFrame
)

Called when the position is reset. This occurs when the renderer is enabled after onStreamChanged has been called, and also when a position discontinuity is encountered.

After a position reset, the renderer's SampleStream is guaranteed to provide samples starting from a key frame if sampleStreamIsResetToKeyFrame is true. sampleStreamIsResetToKeyFrame is guaranteed to be true unless the implementation overrides supportsResetPositionWithoutKeyFrameReset to return true.

The default implementation is a no-op.

Parameters
`long positionUs`	The new playback position in microseconds.
`boolean joining`	Whether this renderer is being enabled to join an ongoing playback.
`boolean sampleStreamIsResetToKeyFrame`	Whether the renderer's `SampleStream` is guaranteed to provide samples starting from a key frame.

Throws
`androidx.media3.exoplayer.ExoPlaybackException`	If an error occurs.

onStarted

protected void onStarted()

Called when the renderer is started.

The default implementation is a no-op.

Throws
`androidx.media3.exoplayer.ExoPlaybackException`	If an error occurs.

onStopped

protected void onStopped()

Called when the renderer is stopped.

The default implementation is a no-op.

onStreamChanged

protected void onStreamChanged(
    Format[] formats,
    long startPositionUs,
    long offsetUs,
    MediaSource.MediaPeriodId mediaPeriodId
)

Called when the renderer's stream has changed. This occurs when the renderer is enabled after onEnabled has been called, and also when the stream has been replaced whilst the renderer is enabled or started.

The default implementation is a no-op.

Parameters
`Format[] formats`	The enabled formats.
`long startPositionUs`	The start position of the new stream in renderer time (microseconds).
`long offsetUs`	The offset that will be added to the timestamps of buffers read via `readSource` so that decoder input buffers have monotonically increasing timestamps.
`MediaSource.MediaPeriodId mediaPeriodId`	The `MediaSource.MediaPeriodId` of the `MediaPeriod` that produces the stream.

Throws
`androidx.media3.exoplayer.ExoPlaybackException`	If an error occurs.

sinkSupportsFormat

protected final boolean sinkSupportsFormat(Format format)

Returns whether the renderer's AudioSink supports a given Format.

See also
`supportsFormat`

supportsFormatInternal

@ForOverride
@C.FormatSupport
protected abstract int supportsFormatInternal(Format format)

Returns the C.FormatSupport for the given Format.

Parameters
`Format format`	The format, which has an audio `sampleMimeType`.

Returns
`int`	The `C.FormatSupport` for this `Format`.