BaseRenderer

Artifact: androidx.media3:media3-exoplayer

Kotlin |Java

@UnstableApi
abstract class BaseRenderer : Renderer, RendererCapabilities

Known direct subclasses

CameraMotionRenderer, DecoderAudioRenderer, DecoderVideoRenderer, FakeRenderer, ImageRenderer, MediaCodecRenderer, MetadataRenderer, TextRenderer

`CameraMotionRenderer`	A `Renderer` that parses the camera motion track.
`DecoderAudioRenderer`	Decodes and renders audio using a `Decoder`.
`DecoderVideoRenderer`	Decodes and renders video using a `Decoder`.
`FakeRenderer`	Fake `Renderer` that supports any format with the matching track type.
`ImageRenderer`	A `Renderer` implementation for images.
`MediaCodecRenderer`	An abstract renderer that uses `MediaCodec` to decode samples for rendering.
`MetadataRenderer`	A renderer for metadata.
`TextRenderer`	A `Renderer` for text.

Known indirect subclasses

CapturingRenderersFactory.CapturingMediaCodecVideoRenderer, FakeAudioRenderer, FakeMediaClockRenderer, FakeVideoRenderer, MediaCodecAudioRenderer, MediaCodecVideoRenderer

`CapturingRenderersFactory.CapturingMediaCodecVideoRenderer`	A `MediaCodecVideoRenderer` that will not skip or drop buffers due to slow processing.
`FakeAudioRenderer`	A `FakeRenderer` that supports `TRACK_TYPE_AUDIO`.
`FakeMediaClockRenderer`	Fake abstract `Renderer` which is also a `MediaClock`.
`FakeVideoRenderer`	A `FakeRenderer` that supports `TRACK_TYPE_VIDEO`.
`MediaCodecAudioRenderer`	Decodes and renders audio using `MediaCodec` and an `AudioSink`.
`MediaCodecVideoRenderer`	Decodes and renders video using `MediaCodec`.

An abstract base class suitable for most Renderer implementations.

It converts many of the state transitions explained in Renderer docs to protected callbacks and provides utilities to access current state values without tracking them manually:

onInit, onEnabled, onStarted, onStopped, onDisabled, onReset and onRelease are called for the corresponding Renderer method.
onStreamChanged is called for both the initial stream set via enable as well as subsequent streams set via replaceStream.
onPositionReset is called for the initial reset via enable as well as subsequent resets via resetPosition.
The current SampleStream can be read with readSource or skipped with skipSource. isSourceReady returning true indicates that samples are available to be read.
Current state is available with additional getter methods like getLastResetPositionUs, getPlayerId, getTimeline.
Exceptions can be created with createRendererException to fill in additional metadata about the renderer automatically.
The renderer can call onRendererCapabilitiesChanged to tell the player of a change in its capabilities, which may lead to new tracks being selected for playback.

Summary

Public constructors
`BaseRenderer(@C.TrackType trackType: Int)`

Public functions
`Unit`	`clearListener()` Clears the `Listener`.
`Unit`	`disable()` Disable the renderer, transitioning it to the `STATE_DISABLED` state.
`Unit`	`enable( configuration: RendererConfiguration!, formats: Array<Format!>!, stream: SampleStream!, positionUs: Long, joining: Boolean, mayRenderStartOfStream: Boolean, startPositionUs: Long, offsetUs: Long, mediaPeriodId: MediaSource.MediaPeriodId! )` Enables the renderer to consume from the specified `SampleStream`.
`RendererCapabilities!`	`getCapabilities()` Returns the capabilities of the renderer.
`MediaClock?`	`getMediaClock()` If the renderer advances its own playback position then this method returns a corresponding `MediaClock`.
`Unit`	`handleMessage(@Renderer.MessageType messageType: Int, message: Any?)` Handles a message delivered to the target.
`Boolean`	`hasReadStreamToEnd()` Returns whether the renderer has read the current `SampleStream` to the end.
`Unit`	`init(index: Int, playerId: PlayerId!, clock: Clock!)` Initializes the renderer for playback with a player.
`Boolean`	`isCurrentStreamFinal()` Returns whether the current `SampleStream` will be the final one supplied before the renderer is next disabled or reset.
`Unit`	`maybeThrowStreamError()` Throws an error that's preventing the renderer from reading from its `SampleStream`.
`Unit`	`release()` Releases the renderer.
`Unit`	`replaceStream( formats: Array<Format!>!, stream: SampleStream!, startPositionUs: Long, offsetUs: Long, mediaPeriodId: MediaSource.MediaPeriodId! )` Replaces the `SampleStream` from which samples will be consumed.
`Unit`	`reset()` Forces the renderer to give up any resources (e.g. media decoders) that it may be holding.
`Unit`	`resetPosition(positionUs: Long, sampleStreamIsResetToKeyFrame: Boolean)` Signals to the renderer that a position discontinuity has occurred.
`Unit`	`setCurrentStreamFinal()` Signals to the renderer that the current `SampleStream` will be the final one supplied before it is next disabled or reset.
`Unit`	`setListener(listener: RendererCapabilities.Listener!)` Sets the `Listener`.
`Unit`	`start()` Starts the renderer, meaning that calls to `render` will cause media to be rendered.
`Unit`	`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.

Protected functions
`ExoPlaybackException!`	`createRendererException( cause: Throwable!, format: Format?, @PlaybackException.ErrorCode errorCode: Int )` Creates an `ExoPlaybackException` of type `TYPE_RENDERER` for this renderer.
`ExoPlaybackException!`	`createRendererException( cause: Throwable!, format: Format?, isRecoverable: Boolean, @PlaybackException.ErrorCode errorCode: Int )` Creates an `ExoPlaybackException` of type `TYPE_RENDERER` for this renderer.
`Boolean`	`isSourceReady()` Returns whether the upstream source is ready.
`Unit`	`onDisabled()` Called when the renderer is disabled.
`Unit`	`onEnabled(joining: Boolean, mayRenderStartOfStream: Boolean)` Called when the renderer is enabled.
`Unit`	`onInit()` Called when the renderer is initialized.
`Unit`	`onPositionReset( positionUs: Long, joining: Boolean, sampleStreamIsResetToKeyFrame: Boolean )` Called when the position is reset.
`Unit`	`onRelease()` Called when the renderer is released.
`Unit`	`onRendererCapabilitiesChanged()` Called when the renderer capabilities are changed.
`Unit`	`onReset()` Called when the renderer is reset.
`Unit`	`onStarted()` Called when the renderer is started.
`Unit`	`onStopped()` Called when the renderer is stopped.
`Unit`	`onStreamChanged( formats: Array<Format!>!, startPositionUs: Long, offsetUs: Long, mediaPeriodId: MediaSource.MediaPeriodId! )` Called when the renderer's stream has changed.
`Unit`	`onTimelineChanged(timeline: Timeline!)` Called when a new timeline is `set`.
`Int`	`@SampleStream.ReadDataResult readSource( formatHolder: FormatHolder!, buffer: DecoderInputBuffer!, @SampleStream.ReadFlags readFlags: Int )` Reads from the enabled upstream source.
`Int`	`skipSource(positionUs: Long)` Attempts to skip to the keyframe before the specified position, or to the end of the stream if `positionUs` is beyond it.

Public properties
`Long`	`readingPositionUs`
`Int`	`state`
`SampleStream?`	`stream`
`Int`	`@C.TrackType trackType`

Protected properties
`@MonotonicNonNull Clock!`	`@MonotonicNonNull clock`
`RendererConfiguration?`	`configuration`
`FormatHolder!`	`formatHolder`
`Int`	`index`
`Long`	`lastResetPositionUs`
`MediaSource.MediaPeriodId?`	`mediaPeriodId`
`@MonotonicNonNull PlayerId!`	`@MonotonicNonNull playerId`
`Array<Format!>?`	`streamFormats`
`Long`	`streamOffsetUs`
`Timeline!`	`timeline`

Inherited Constants

From androidx.media3.exoplayer.Renderer

`const Long`	`DEFAULT_DURATION_TO_PROGRESS_US = 10000` Default minimum duration that the playback clock must advance before `render` can make progress.
`const 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`.
`const Int`	`MSG_CUSTOM_BASE = 10000` Applications or extensions may define custom `MSG_*` constants that can be passed to renderers.
`const Int`	`MSG_SET_AUDIO_ATTRIBUTES = 3` A type of a message that can be passed to an audio renderer via `createMessage`.
`const Int`	`MSG_SET_AUDIO_OUTPUT_PROVIDER = 20` The type of a message that can be passed to audio renderers via `createMessage`.
`const Int`	`MSG_SET_AUDIO_SESSION_ID = 10` The type of a message that can be passed to audio and video renderers via `createMessage`.
`const Int`	`MSG_SET_AUX_EFFECT_INFO = 6` A type of a message that can be passed to an audio renderer via `createMessage`.
`const Int`	`MSG_SET_CAMERA_MOTION_LISTENER = 8` The type of a message that can be passed to a camera motion renderer via `createMessage`.
`const Int`	`MSG_SET_CHANGE_FRAME_RATE_STRATEGY = 5` The type of a message that can be passed to a video renderer via `createMessage`.
`const Int`	`MSG_SET_CODEC_PARAMETERS = 21` The type of a message that can be passed to renderers via `createMessage`.
`const Int`	`MSG_SET_IMAGE_OUTPUT = 15` The type of message that can be passed to an image renderer to set a desired image output.
`const Int`	`MSG_SET_PREFERRED_AUDIO_DEVICE = 12` The type of a message that can be passed to audio renderers via `createMessage`.
`const Int`	`MSG_SET_PRIORITY = 16` The type of message that can be passed to a renderer to set its priority.
`const Int`	`MSG_SET_SCALING_MODE = 4` The type of a message that can be passed to a `MediaCodec`-based video renderer via `createMessage`.
`const 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.
`const Int`	`MSG_SET_SKIP_SILENCE_ENABLED = 9` The type of a message that can be passed to an audio renderer via `createMessage`.
`const Int`	`MSG_SET_SUBSCRIBED_CODEC_PARAMETER_KEYS = 22` A message to set the keys for which a renderer should report parameter changes.
`const Int`	`MSG_SET_VIDEO_EFFECTS = 13` The type of a message that can be passed to a video renderer.
`const Int`	`MSG_SET_VIDEO_FRAME_METADATA_LISTENER = 7` The type of a message that can be passed to a video renderer via `createMessage`.
`const Int`	`MSG_SET_VIDEO_OUTPUT = 1` The type of a message that can be passed to a video renderer via `createMessage`.
`const 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.
`const Int`	`MSG_SET_VIRTUAL_DEVICE_ID = 19` The type of a message that can be passed to audio renderers via `createMessage`.
`const Int`	`MSG_SET_VOLUME = 2` A type of a message that can be passed to an audio renderer via `createMessage`.
`const 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.
`const 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.
`const Int`	`STATE_DISABLED = 0` The renderer is disabled.
`const Int`	`STATE_ENABLED = 1` The renderer is enabled but not started.
`const Int`	`STATE_STARTED = 2` The renderer is started.

From androidx.media3.exoplayer.RendererCapabilities

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

Inherited functions

From androidx.media3.exoplayer.Renderer

`Unit`	`enableMayRenderStartOfStream()` Enables this renderer to render the start of the stream even if the state is not `STATE_STARTED` yet.
`Long`	`getDurationToProgressUs(positionUs: Long, elapsedRealtimeUs: Long)` Returns minimum amount of playback clock time that must pass in order for the `render` call to make progress.
`abstract String!`	`getName()` Returns the name of this renderer, for logging and debugging purposes.
`abstract Boolean`	`isEnded()` Whether the renderer is ready for the `ExoPlayer` instance to transition to `STATE_ENDED`.
`abstract Boolean`	`isReady()` Whether the renderer is able to immediately render media from the current position.
`abstract Unit`	`render(positionUs: Long, elapsedRealtimeUs: Long)` Incrementally renders the `SampleStream`.
`Unit`	`setPlaybackSpeed(currentPlaybackSpeed: Float, targetPlaybackSpeed: Float)` Indicates the playback speed to this renderer.
`Boolean`	`supportsResetPositionWithoutKeyFrameReset(positionUs: Long)` Returns whether the renderer can support processing a position discontinuity without a key frame reset.

From androidx.media3.exoplayer.RendererCapabilities

`java-static Int`	`@RendererCapabilities.Capabilities create(@C.FormatSupport formatSupport: Int)` Returns `Capabilities` for the given `C.FormatSupport`.
`java-static Int`	`@RendererCapabilities.Capabilities create( @C.FormatSupport formatSupport: Int, @RendererCapabilities.AdaptiveSupport adaptiveSupport: Int, @RendererCapabilities.TunnelingSupport tunnelingSupport: Int )` Returns `Capabilities` combining the given `C.FormatSupport`, `AdaptiveSupport` and `TunnelingSupport`.
`java-static Int`	`@RendererCapabilities.Capabilities create( @C.FormatSupport formatSupport: Int, @RendererCapabilities.AdaptiveSupport adaptiveSupport: Int, @RendererCapabilities.TunnelingSupport tunnelingSupport: Int, @RendererCapabilities.AudioOffloadSupport audioOffloadSupport: Int )` Returns `Capabilities` combining the given `C.FormatSupport`, `AdaptiveSupport`, `TunnelingSupport`, and `AudioOffloadSupport`.
`java-static Int`	`@RendererCapabilities.Capabilities create( @C.FormatSupport formatSupport: Int, @RendererCapabilities.AdaptiveSupport adaptiveSupport: Int, @RendererCapabilities.TunnelingSupport tunnelingSupport: Int, @RendererCapabilities.HardwareAccelerationSupport hardwareAccelerationSupport: Int, @RendererCapabilities.DecoderSupport decoderSupport: Int )` Returns `Capabilities` combining the given `C.FormatSupport`, `AdaptiveSupport`, `TunnelingSupport`, `HardwareAccelerationSupport`, and `DecoderSupport`.
`java-static Int`	`@RendererCapabilities.Capabilities create( @C.FormatSupport formatSupport: Int, @RendererCapabilities.AdaptiveSupport adaptiveSupport: Int, @RendererCapabilities.TunnelingSupport tunnelingSupport: Int, @RendererCapabilities.HardwareAccelerationSupport hardwareAccelerationSupport: Int, @RendererCapabilities.DecoderSupport decoderSupport: Int, @RendererCapabilities.AudioOffloadSupport audioOffloadSupport: Int )` Returns `Capabilities` combining the given `C.FormatSupport`, `AdaptiveSupport`, `TunnelingSupport`, `HardwareAccelerationSupport`, `DecoderSupport` and `AudioOffloadSupport`.
`java-static Int`	`@RendererCapabilities.AdaptiveSupport getAdaptiveSupport(@RendererCapabilities.Capabilities supportFlags: Int)` Returns the `AdaptiveSupport` from the combined `Capabilities`.
`java-static Int`	`@RendererCapabilities.AudioOffloadSupport getAudioOffloadSupport( @RendererCapabilities.Capabilities supportFlags: Int )` Returns the `AudioOffloadSupport` from the combined `Capabilities`.
`java-static Int`	`@RendererCapabilities.DecoderSupport getDecoderSupport(@RendererCapabilities.Capabilities supportFlags: Int)` Returns the `DecoderSupport` from the combined `Capabilities`.
`java-static Int`	`@C.FormatSupport getFormatSupport(@RendererCapabilities.Capabilities supportFlags: Int)` Returns the `C.FormatSupport` from the combined `Capabilities`.
`java-static Int`	`@RendererCapabilities.HardwareAccelerationSupport getHardwareAccelerationSupport( @RendererCapabilities.Capabilities supportFlags: Int )` Returns the `HardwareAccelerationSupport` from the combined `Capabilities`.
`java-static Int`	`@RendererCapabilities.TunnelingSupport getTunnelingSupport(@RendererCapabilities.Capabilities supportFlags: Int)` Returns the `TunnelingSupport` from the combined `Capabilities`.
`java-static Boolean`	`isFormatSupported( @RendererCapabilities.Capabilities supportFlags: Int, allowExceedsCapabilities: Boolean )` Returns whether the `C.FormatSupport` from the combined `Capabilities` indicates the format is supported.
`abstract Int`	`@RendererCapabilities.Capabilities supportsFormat(format: Format!)` Returns the extent to which the `Renderer` supports a given format.

Public constructors

BaseRenderer

BaseRenderer(@C.TrackType trackType: Int)

Parameters
`@C.TrackType trackType: Int`	The track type that the renderer handles. One of the `CTRACK_TYPE_*` constants.

Public functions

clearListener

fun clearListener(): Unit

Clears the Listener.

disable

fun disable(): Unit

Disable the renderer, transitioning it to the STATE_DISABLED state.

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

enable

fun enable(
    configuration: RendererConfiguration!,
    formats: Array<Format!>!,
    stream: SampleStream!,
    positionUs: Long,
    joining: Boolean,
    mayRenderStartOfStream: Boolean,
    startPositionUs: Long,
    offsetUs: Long,
    mediaPeriodId: MediaSource.MediaPeriodId!
): Unit

Enables the renderer to consume from the specified SampleStream.

This method may be called when the renderer is in the following states: STATE_DISABLED.

Parameters
`configuration: RendererConfiguration!`	The renderer configuration.
`formats: Array<Format!>!`	The enabled formats.
`stream: SampleStream!`	The `SampleStream` from which the renderer should consume.
`positionUs: Long`	The player's current position.
`joining: Boolean`	Whether this renderer is being enabled to join an ongoing playback.
`mayRenderStartOfStream: Boolean`	Whether this renderer is allowed to render the start of the stream even if the state is not `STATE_STARTED` yet.
`startPositionUs: Long`	The start position of the stream in renderer time (microseconds).
`offsetUs: Long`	The offset to be added to timestamps of buffers read from `stream` before they are rendered.
`mediaPeriodId: MediaSource.MediaPeriodId!`	The `MediaPeriodId` of the `MediaPeriod` producing the `stream`.

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

getCapabilities

fun getCapabilities(): RendererCapabilities!

Returns the capabilities of the renderer.

Returns
`RendererCapabilities!`	The capabilities of the renderer.

getMediaClock

fun getMediaClock(): MediaClock?

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
`MediaClock?`	The `MediaClock` tracking the playback position of the renderer, or null.

handleMessage

fun handleMessage(@Renderer.MessageType messageType: Int, message: Any?): Unit

Handles a message delivered to the target.

Parameters
`@Renderer.MessageType messageType: Int`	The message type.
`message: Any?`	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.

hasReadStreamToEnd

fun hasReadStreamToEnd(): Boolean

Returns whether the renderer has read the current SampleStream to the end.

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

init

fun init(index: Int, playerId: PlayerId!, clock: Clock!): Unit

Initializes the renderer for playback with a player.

Parameters
`index: Int`	The renderer index within the player.
`playerId: PlayerId!`	The `PlayerId` of the player.
`clock: Clock!`	The `Clock`.

isCurrentStreamFinal

fun isCurrentStreamFinal(): Boolean

Returns whether the current SampleStream will be the final one supplied before the renderer is next disabled or reset.

maybeThrowStreamError

fun maybeThrowStreamError(): Unit

Throws an error that's preventing the renderer from reading from its SampleStream. Does nothing if no such error exists.

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

Throws
`java.io.IOException`	An error that's preventing the renderer from making progress or buffering more data.

release

fun release(): Unit

Releases the renderer.

The renderer must not be used after calling this method.

replaceStream

fun replaceStream(
    formats: Array<Format!>!,
    stream: SampleStream!,
    startPositionUs: Long,
    offsetUs: Long,
    mediaPeriodId: MediaSource.MediaPeriodId!
): Unit

Replaces the SampleStream from which samples will be consumed.

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

Parameters
`formats: Array<Format!>!`	The enabled formats.
`stream: SampleStream!`	The `SampleStream` from which the renderer should consume.
`startPositionUs: Long`	The start position of the new stream in renderer time (microseconds).
`offsetUs: Long`	The offset to be added to timestamps of buffers read from `stream` before they are rendered.
`mediaPeriodId: MediaSource.MediaPeriodId!`	The `MediaPeriodId` of the `MediaPeriod` producing the `stream`.

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

reset

fun reset(): Unit

Forces the renderer to give up any resources (e.g. media decoders) that it may be holding. If the renderer is not holding any resources, the call is a no-op.

This method may be called when the renderer is in the following states: STATE_DISABLED.

resetPosition

fun resetPosition(positionUs: Long, sampleStreamIsResetToKeyFrame: Boolean): Unit

Signals to the renderer that a position discontinuity has occurred.

If sampleStreamIsResetToKeyFrame is true then after the position discontinuity, the renderer's SampleStream is guaranteed to provide samples starting from a key frame.

sampleStreamIsResetToKeyFrame is guaranteed to be true unless the implementation overrides supportsResetPositionWithoutKeyFrameReset to return true.

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

Parameters
`positionUs: Long`	The new playback position in microseconds.
`sampleStreamIsResetToKeyFrame: Boolean`	Whether the renderer's `SampleStream` is guaranteed to provide samples starting from a key frame.

Throws
`androidx.media3.exoplayer.ExoPlaybackException`	If an error occurs handling the reset.

setCurrentStreamFinal

fun setCurrentStreamFinal(): Unit

Signals to the renderer that the current SampleStream will be the final one supplied before it is next disabled or reset.

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

setListener

fun setListener(listener: RendererCapabilities.Listener!): Unit

Sets the Listener.

Parameters
`listener: RendererCapabilities.Listener!`	The listener to be set.

start

fun start(): Unit

Starts the renderer, meaning that calls to render will cause media to be rendered.

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

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

stop

fun stop(): Unit

Stops the renderer, transitioning it to the STATE_ENABLED state.

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

supportsMixedMimeTypeAdaptation

@RendererCapabilities.AdaptiveSupport
fun supportsMixedMimeTypeAdaptation(): Int

Returns the extent to which the Renderer supports adapting between supported formats that have different MIME types.

Returns
`Int`	The `AdaptiveSupport` for adapting between supported formats that have different MIME types.

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

Protected functions

createRendererException

protected fun createRendererException(
    cause: Throwable!,
    format: Format?,
    @PlaybackException.ErrorCode errorCode: Int
): ExoPlaybackException!

Creates an ExoPlaybackException of type TYPE_RENDERER for this renderer.

Parameters
`cause: Throwable!`	The cause of the exception.
`format: Format?`	The current format used by the renderer. May be null.
`@PlaybackException.ErrorCode errorCode: Int`	A `PlaybackException.ErrorCode` to identify the cause of the playback failure.

Returns
`ExoPlaybackException!`	The created instance, in which `isRecoverable` is `false`.

createRendererException

protected fun createRendererException(
    cause: Throwable!,
    format: Format?,
    isRecoverable: Boolean,
    @PlaybackException.ErrorCode errorCode: Int
): ExoPlaybackException!

Creates an ExoPlaybackException of type TYPE_RENDERER for this renderer.

Parameters
`cause: Throwable!`	The cause of the exception.
`format: Format?`	The current format used by the renderer. May be null.
`isRecoverable: Boolean`	If the error is recoverable by disabling and re-enabling the renderer.
`@PlaybackException.ErrorCode errorCode: Int`	A `PlaybackException.ErrorCode` to identify the cause of the playback failure.

Returns
`ExoPlaybackException!`	The created instance.

isSourceReady

protected fun isSourceReady(): Boolean

Returns whether the upstream source is ready.

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

onDisabled

protected fun onDisabled(): Unit

Called when the renderer is disabled.

The default implementation is a no-op.

onEnabled

protected fun onEnabled(joining: Boolean, mayRenderStartOfStream: Boolean): Unit

Called when the renderer is enabled.

The default implementation is a no-op.

Parameters
`joining: Boolean`	Whether this renderer is being enabled to join an ongoing playback.
`mayRenderStartOfStream: Boolean`	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.

onInit

protected fun onInit(): Unit

Called when the renderer is initialized.

onPositionReset

protected fun onPositionReset(
    positionUs: Long,
    joining: Boolean,
    sampleStreamIsResetToKeyFrame: Boolean
): Unit

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

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

onRelease

protected fun onRelease(): Unit

Called when the renderer is released.

The default implementation is a no-op.

onRendererCapabilitiesChanged

protected fun onRendererCapabilitiesChanged(): Unit

Called when the renderer capabilities are changed.

onReset

protected fun onReset(): Unit

Called when the renderer is reset.

The default implementation is a no-op.

onStarted

protected fun onStarted(): Unit

Called when the renderer is started.

The default implementation is a no-op.

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

onStopped

protected fun onStopped(): Unit

Called when the renderer is stopped.

The default implementation is a no-op.

onStreamChanged

protected fun onStreamChanged(
    formats: Array<Format!>!,
    startPositionUs: Long,
    offsetUs: Long,
    mediaPeriodId: MediaSource.MediaPeriodId!
): Unit

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

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

onTimelineChanged

protected fun onTimelineChanged(timeline: Timeline!): Unit

Called when a new timeline is set.

The default implementation is a no-op.

Parameters
`timeline: Timeline!`	The new timeline, which can also be obtained from `getTimeline`.

readSource

@SampleStream.ReadDataResult
protected fun readSource(
    formatHolder: FormatHolder!,
    buffer: DecoderInputBuffer!,
    @SampleStream.ReadFlags readFlags: Int
): Int

Reads from the enabled upstream source. If the upstream source has been read to the end then RESULT_BUFFER_READ is only returned if setCurrentStreamFinal has been called. RESULT_NOTHING_READ is returned otherwise.

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

Parameters
`formatHolder: FormatHolder!`	A `FormatHolder` to populate in the case of reading a format.
`buffer: DecoderInputBuffer!`	A `DecoderInputBuffer` to populate in the case of reading a sample or the end of the stream. If the end of the stream has been reached, the `BUFFER_FLAG_END_OF_STREAM` flag will be set on the buffer.
`@SampleStream.ReadFlags readFlags: Int`	Flags controlling the behavior of this read operation.

Returns
`Int`	The `result` of the read operation.

Throws
`androidx.media3.decoder.DecoderInputBuffer.InsufficientCapacityException`	If the `buffer` has insufficient capacity to hold the data of a sample being read. The buffer `timestamp` and flags are populated if this exception is thrown, but the read position is not advanced.

skipSource

protected fun skipSource(positionUs: Long): Int

Attempts to skip to the keyframe before the specified position, or to the end of the stream if positionUs is beyond it.

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

Parameters
`positionUs: Long`	The position in microseconds.

Returns
`Int`	The number of samples that were skipped.

Public properties

readingPositionUs

val readingPositionUs: Long

state

val state: Int

stream

val stream: SampleStream?

trackType

@C.TrackType
val trackType: Int

Protected properties

clock

@MonotonicNonNull
protected val clock: @MonotonicNonNull Clock!

configuration

protected val configuration: RendererConfiguration?

formatHolder

protected val formatHolder: FormatHolder!

index

protected val index: Int

lastResetPositionUs

protected val lastResetPositionUs: Long

mediaPeriodId

protected val mediaPeriodId: MediaSource.MediaPeriodId?

playerId

@MonotonicNonNull
protected val playerId: @MonotonicNonNull PlayerId!

streamFormats

protected val streamFormats: Array<Format!>?

streamOffsetUs

protected val streamOffsetUs: Long

timeline

protected var timeline: Timeline!