Package org.robolectric.shadows

Class ShadowAudioTrack

java.lang.Object

org.robolectric.shadows.ShadowAudioTrack

@Implements(value=android.media.AudioTrack.class,
            looseSignatures=true)
public class ShadowAudioTrack
extends Object

Implementation of a couple methods in AudioTrack. Only a couple methods are supported, other methods are expected run through the real class. The two AudioTrack.WriteMode are treated the same.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	ShadowAudioTrack.OnAudioDataWrittenListener	Listeners to be notified when data is written to an AudioTrack via AudioTrack.write(ByteBuffer, int, int)

Field Summary

Fields

Modifier and Type	Field	Description
protected static final int	DEFAULT_MIN_BUFFER_SIZE

Constructor Summary

Constructors

Constructor	Description
ShadowAudioTrack()

Method Summary

Modifier and Type	Method	Description
static void	addAllowedNonPcmEncoding(int encoding)	Add a non-PCM encoding for which AudioTrack instances are allowed to be created.
static void	addAudioDataListener(ShadowAudioTrack.OnAudioDataWrittenListener listener)	Registers an ShadowAudioTrack.OnAudioDataWrittenListener to the ShadowAudioTrack.
static void	addDirectPlaybackSupport(AudioFormat format, AudioAttributes attr)	Adds support for direct playback for the pair of AudioFormat and AudioAttributes where the format encoding must be non-PCM.
static void	clearAllowedNonPcmEncodings()	Clears all encodings that have been added with addAllowedNonPcmEncoding(int).
static void	clearDirectPlaybackSupportedFormats()	Clears all encodings that have been added for direct playback support with addDirectPlaybackSupport(android.media.AudioFormat, android.media.AudioAttributes).
protected void	flush()
protected int	getPlaybackHeadPosition()
protected final PlaybackParams	getPlaybackParams()
protected static int	native_get_FCC_8()
protected static int	native_get_min_buff_size(int sampleRateInHz, int channelConfig, int audioFormat)	Returns a predefined or default minimum buffer size.
protected static boolean	native_is_direct_output_supported(int encoding, int sampleRate, int channelMask, int channelIndexMask, int contentType, int usage, int flags)
protected int	native_setup(Object audioTrack, Object attributes, int[] sampleRate, int channelMask, int channelIndexMask, int audioFormat, int buffSizeInBytes, int mode, int[] sessionId, long nativeAudioTrack, boolean offload)
protected int	native_setup(Object audioTrack, Object attributes, int[] sampleRate, int channelMask, int channelIndexMask, int audioFormat, int buffSizeInBytes, int mode, int[] sessionId, long nativeAudioTrack, boolean offload, int encapsulationMode, Object tunerConfiguration)
protected int	native_setup(Object audioTrack, Object attributes, int[] sampleRate, int channelMask, int channelIndexMask, int audioFormat, int buffSizeInBytes, int mode, int[] sessionId, long nativeAudioTrack, boolean offload, int encapsulationMode, Object tunerConfiguration, String opPackageName)
protected int	native_setup(Object audioTrack, Object attributes, int[] sampleRate, int channelMask, int channelIndexMask, int audioFormat, int buffSizeInBytes, int mode, int[] sessionId, Parcel attributionSource, long nativeAudioTrack, boolean offload, int encapsulationMode, Object tunerConfiguration, String opPackageName)
protected final int	native_write_byte(byte[] audioData, int offsetInBytes, int sizeInBytes, int format, boolean isBlocking)	Returns the number of bytes to write.
static void	removeAudioDataListener(ShadowAudioTrack.OnAudioDataWrittenListener listener)	Removes an ShadowAudioTrack.OnAudioDataWrittenListener from the ShadowAudioTrack.
static void	resetTest()
static void	setMinBufferSize(int bufferSize)	In the real class, the minimum buffer size is estimated from audio sample rate and other factors.
void	setPlaybackParams(PlaybackParams params)
protected int	write(ByteBuffer audioData, int sizeInBytes, int writeMode)	Returns the number of bytes to write, except with invalid parameters.

Methods inherited from class java.lang.Object

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

Field Details

DEFAULT_MIN_BUFFER_SIZE

protected static final int DEFAULT_MIN_BUFFER_SIZE

See Also:

• Constant Field Values

Constructor Details

ShadowAudioTrack

public ShadowAudioTrack()

Method Details

setMinBufferSize

public static void setMinBufferSize(int bufferSize)

In the real class, the minimum buffer size is estimated from audio sample rate and other factors. We do not provide such estimation in native_get_min_buff_size(int, int, int), instead letting users set the minimum for the expected audio sample. Usually higher sample rate requires bigger buffer size.

addDirectPlaybackSupport

public static void addDirectPlaybackSupport(AudioFormat format,
 AudioAttributes attr)

Adds support for direct playback for the pair of AudioFormat and AudioAttributes where the format encoding must be non-PCM. Calling AudioTrack.isDirectPlaybackSupported(AudioFormat, AudioAttributes) will return true for matching AudioFormat and AudioAttributes. The matching is performed against the format's encoding, sample rate, channel mask and channel index mask, and the attribute's content type, usage and flags.

Parameters:

format - The AudioFormat, which must be of a non-PCM encoding. If the encoding is PCM, the method will throw an IllegalArgumentException.

attr - The AudioAttributes.

clearDirectPlaybackSupportedFormats

public static void clearDirectPlaybackSupportedFormats()

Clears all encodings that have been added for direct playback support with addDirectPlaybackSupport(android.media.AudioFormat, android.media.AudioAttributes).

addAllowedNonPcmEncoding

public static void addAllowedNonPcmEncoding(int encoding)

Add a non-PCM encoding for which AudioTrack instances are allowed to be created.

Parameters:

encoding - One of AudioFormat ENCODING_ constants that represents a non-PCM encoding. If encoding is PCM, this method throws an IllegalArgumentException.

clearAllowedNonPcmEncodings

public static void clearAllowedNonPcmEncodings()

Clears all encodings that have been added with addAllowedNonPcmEncoding(int).

native_get_FCC_8

@Implementation(minSdk=24,
                maxSdk=28)
protected static int native_get_FCC_8()

native_is_direct_output_supported

@Implementation(minSdk=29)
protected static boolean native_is_direct_output_supported(int encoding,
 int sampleRate,
 int channelMask,
 int channelIndexMask,
 int contentType,
 int usage,
 int flags)

native_get_min_buff_size

@Implementation
protected static int native_get_min_buff_size(int sampleRateInHz,
 int channelConfig,
 int audioFormat)

Returns a predefined or default minimum buffer size. Audio format and config are neglected.

native_setup

@Implementation(minSdk=28,
                maxSdk=29)
protected int native_setup(Object audioTrack,
 Object attributes,
 int[] sampleRate,
 int channelMask,
 int channelIndexMask,
 int audioFormat,
 int buffSizeInBytes,
 int mode,
 int[] sessionId,
 long nativeAudioTrack,
 boolean offload)

native_setup

@Implementation(minSdk=30,
                maxSdk=30)
protected int native_setup(Object audioTrack,
 Object attributes,
 int[] sampleRate,
 int channelMask,
 int channelIndexMask,
 int audioFormat,
 int buffSizeInBytes,
 int mode,
 int[] sessionId,
 long nativeAudioTrack,
 boolean offload,
 int encapsulationMode,
 Object tunerConfiguration)

native_setup

@Implementation(minSdk=31,
                maxSdk=33)
protected int native_setup(Object audioTrack,
 Object attributes,
 int[] sampleRate,
 int channelMask,
 int channelIndexMask,
 int audioFormat,
 int buffSizeInBytes,
 int mode,
 int[] sessionId,
 long nativeAudioTrack,
 boolean offload,
 int encapsulationMode,
 Object tunerConfiguration,
 String opPackageName)

native_setup

@Implementation(minSdk=34)
protected int native_setup(Object audioTrack,
 Object attributes,
 int[] sampleRate,
 int channelMask,
 int channelIndexMask,
 int audioFormat,
 int buffSizeInBytes,
 int mode,
 int[] sessionId,
 Parcel attributionSource,
 long nativeAudioTrack,
 boolean offload,
 int encapsulationMode,
 Object tunerConfiguration,
 String opPackageName)

native_write_byte

@Implementation(minSdk=23)
protected final int native_write_byte(byte[] audioData,
 int offsetInBytes,
 int sizeInBytes,
 int format,
 boolean isBlocking)

Returns the number of bytes to write. This method returns immediately even with AudioTrack.WRITE_BLOCKING. If the AudioTrack instance was created with a non-PCM encoding and the encoding can no longer be played directly, the method will return AudioTrack.ERROR_DEAD_OBJECT;

setPlaybackParams

@Implementation(minSdk=23)
public void setPlaybackParams(PlaybackParams params)

getPlaybackParams

@Implementation(minSdk=23)
protected final PlaybackParams getPlaybackParams()

write

@Implementation(minSdk=21)
protected int write(ByteBuffer audioData,
 int sizeInBytes,
 int writeMode)

Returns the number of bytes to write, except with invalid parameters. If the AudioTrack was created for a non-PCM encoding that can no longer be played directly, it returns AudioTrack.ERROR_DEAD_OBJECT. Assumes AudioTrack is already initialized (object properly created). Do not block even if AudioTrack in offload mode is in STOPPING play state. This method returns immediately even with AudioTrack.WRITE_BLOCKING

getPlaybackHeadPosition

@Implementation
protected int getPlaybackHeadPosition()

flush

@Implementation
protected void flush()

addAudioDataListener

public static void addAudioDataListener(ShadowAudioTrack.OnAudioDataWrittenListener listener)

Registers an ShadowAudioTrack.OnAudioDataWrittenListener to the ShadowAudioTrack.

Parameters:

listener - The ShadowAudioTrack.OnAudioDataWrittenListener to be registered.

removeAudioDataListener

public static void removeAudioDataListener(ShadowAudioTrack.OnAudioDataWrittenListener listener)

Removes an ShadowAudioTrack.OnAudioDataWrittenListener from the ShadowAudioTrack.

Parameters:

listener - The ShadowAudioTrack.OnAudioDataWrittenListener to be removed.

resetTest

@Resetter
public static void resetTest()