SonicAudioProcessor

public static final int SAMPLE_RATE_NO_CHANGE = -1

Indicates that the output sample rate should be the same as the input.

public SonicAudioProcessor()

Creates a new Sonic audio processor.

public final AudioProcessor.AudioFormat configure(AudioProcessor.AudioFormat inputAudioFormat)

Configures the processor to process input audio with the specified format. After calling this method, call isActive to determine whether the audio processor is active. Returns the configured output audio format if this instance is active.

After calling this method, it is necessary to flush the processor to apply the new configuration. Before applying the new configuration, it is safe to queue input and get output in the old input/output formats. Call queueEndOfStream when no more input will be supplied in the old input format.

public final void flush()

Clears any buffered data and pending output. If the audio processor is active, also prepares the audio processor to receive a new stream of input in the last configured (pending) format.

public final long getMediaDuration(long playoutDuration)

Returns the media duration corresponding to the specified playout duration, taking speed adjustment into account.

The scaling performed by this method will use the actual playback speed achieved by the audio processor, on average, since it was last flushed. This may differ very slightly from the target playback speed.

public final ByteBuffer getOutput()

Returns a buffer containing processed output data between its position and limit. The buffer will always be a direct byte buffer with native byte order. Calling this method invalidates any previously returned buffer. The buffer will be empty if no output is available.

public final boolean isActive()

Returns whether the processor is configured and will process input buffers.

public final boolean isEnded()

Returns whether this processor will return no more output from getOutput until flush has been called and more input has been queued.

public final void queueEndOfStream()

Queues an end of stream signal. After this method has been called, queueInput may not be called until after the next call to flush. Calling getOutput will return any remaining output data. Multiple calls may be required to read all of the remaining output data. isEnded will return true once all remaining output data has been read.

public final void queueInput(ByteBuffer inputBuffer)

Queues audio data between the position and limit of the inputBuffer for processing. After calling this method, processed output may be available via getOutput. Calling queueInput(ByteBuffer) again invalidates any pending output.

public final void reset()

Resets the processor to its unconfigured state, releasing any resources.

public final void setOutputSampleRateHz(int sampleRateHz)

Sets the sample rate for output audio, in Hertz. Pass SAMPLE_RATE_NO_CHANGE to output audio at the same sample rate as the input. After calling this method, call configure to configure the processor with the new sample rate.

public final void setPitch(float pitch)

Sets the target playback pitch. This method may only be called after draining data through the processor. The value returned by isActive may change, and the processor must be flushed before queueing more data.

public final void setSpeed(float speed)

Sets the target playback speed. This method may only be called after draining data through the processor. The value returned by isActive may change, and the processor must be flushed before queueing more data.