DspThread

Field Detail

• sampleRate

  private final int sampleRate

  See Also:

  Constant Field Values

• blockSize

  private int blockSize

• dspAlgorithm

  private DspAlgorithm dspAlgorithm

• algorithm

  private DspThread.AlgorithmEnum algorithm

• parameter1

  private double parameter1

• maxDspCycles

  private int maxDspCycles

• DEFAULT_BLOCK_SIZE

  private final int DEFAULT_BLOCK_SIZE

  See Also:

  Constant Field Values

• AUDIO_SOURCE_MIC

  public static final int AUDIO_SOURCE_MIC

  See Also:

  Constant Field Values

• AUDIO_SOURCE_WAV

  public static final int AUDIO_SOURCE_WAV

  See Also:

  Constant Field Values

• audioSource

  private int audioSource

• inputStream

  private java.io.InputStream inputStream

• track

  AudioTrack track

• buffer

  short[] buffer

• BUFFER_SIZE_IN_BLOCKS

  final int BUFFER_SIZE_IN_BLOCKS

  See Also:

  Constant Field Values

• jx

  int jx

• performBuffer

  double[] performBuffer

• sampleWriteTime

  private long sampleWriteTime

• dspPerformTime

  private long dspPerformTime

• dspCallbackTime

  private long dspCallbackTime

• callbackTicks

  private long callbackTicks

• elapsedTime

  private long elapsedTime

• startTime

  private long startTime

• audioStream

  AudioStream audioStream

• stressParameter

  int stressParameter

• STATE_STOPPED

  private static final int STATE_STOPPED

  See Also:

  Constant Field Values

• STATE_PROCESSING

  private static final int STATE_PROCESSING

  See Also:

  Constant Field Values

• STATE_SUSPENDED

  private static final int STATE_SUSPENDED

  See Also:

  Constant Field Values

• state

  private int state

• map_algorithm

  private java.util.EnumMap<DspThread.AlgorithmEnum,DspAlgorithm> map_algorithm

Constructor Detail

• DspThread

  public DspThread()

  Creates a DSP Thread that runs for a maximum amount of cycles and a filterSize for stress testing.

Method Detail

• setupAudioStream

  private void setupAudioStream()

  Initiate audio stream either from MIC or WAV file.

• scheduleDspCallback

  private void scheduleDspCallback()

  Schedule the DSP callback.

• resetDsp

  public void resetDsp()

  Reset thread statistics

• setupAudioTrack

  private void setupAudioTrack()

  Instantiate and configure the player.

• setInputStream

  public void setInputStream(java.io.InputStream stream)

  Set the input stream.

  Parameters:

  stream -

• setAudioSource

  public void setAudioSource(int source)

  Set the audio source.

  Parameters:

  source -

• setMaxDspCycles

  public void setMaxDspCycles(int max)

  Set the maximum number of DSP cycles this thread is allowed to run. After that, the thread becomes suspended.

  Parameters:

  max -

• setAlgorithm

  public void setAlgorithm(DspThread.AlgorithmEnum alg)

  Configure the algorithm used to transform the stream given a sample rate and a block size. The algorithm order must be the same as the one in 'res/values/strings.xml': 0. Loopback. 1. Reverb. 2. FftAlgorithm. 3. PhaseVocoder. 4. StressAlgorithm. 5. Additive Synthesis. 8. FFTW monothread. 9. FFTW multithread.

  Parameters:

  alg - The number of the algorithm.

• getAlgorithmName

  public java.lang.String getAlgorithmName()

  Returns:

  The name of the current algorithm.

• setStressParameter

  public void setStressParameter(int param)

  Set the stress parameter used when running stress test algorithms. Will also set the parameter in the algorithm in case it is of the correct type.

  Parameters:

  param -

• setBlockSize

  public void setBlockSize(int bSize)

  Set the DSP block size.

  Parameters:

  bSize -

• setParams

  public void setParams(double param1)

  Set generic DSP parameters. These parameters are set either by the user or by automated tests and can be used by DSP algorithms as parameters such as filter size, gain, feedback param, etc. For now, there's just one param (which comes from a slider in 'res/layout/dsp.xml' view), but more can be added.

  Parameters:

  param1 -

• getSampleReadMeanTime

  public double getSampleReadMeanTime()

  Returns:

  The mean time of sample reads from input.

• getSampleWriteMeanTime

  public double getSampleWriteMeanTime()

  Returns:

  The mean time of sample write to output.

• getDspPerformMeanTime

  public double getDspPerformMeanTime()

  Returns:

  The mean DSP perform callback mean time.

• getDspCallbackMeanTime

  public double getDspCallbackMeanTime()

  Returns:

  The DSP callback mean time.

• getSampleRate

  public int getSampleRate()

  Returns:

  The DSP sample rate.

• getBlockSize

  public int getBlockSize()

  Returns:

  The DSP block size.

• getCallbackPeriodMeanTime

  public double getCallbackPeriodMeanTime()

  Returns:

  The callback period mean time.

• getReadTicks

  public long getReadTicks()

  Returns:

  The amount of blocks read from input.

• getCallbackTicks

  public long getCallbackTicks()

  Returns:

  The amount of times the DSP callback was executed.

• getBlockPeriod

  public double getBlockPeriod()

  Returns:

  The block period in milliseconds.

• getElapsedTime

  public double getElapsedTime()

  Returns:

  The elapsed time since DSP was first started.

• getAlgorithm

  public DspThread.AlgorithmEnum getAlgorithm()

  Returns:

  The current algorithm.

• getAlgorithmNameById

  public java.lang.String getAlgorithmNameById(DspThread.AlgorithmEnum id)

• run

  public void run()

  This is called when the thread starts. Runs until stopDspThread() is called.

  Specified by:

  run in interface java.lang.Runnable

  Overrides:

  run in class java.lang.Thread

• createPerformBuffer

  private void createPerformBuffer()

  Create a buffer to store audio samples.

• releaseIO

  private void releaseIO()

  Stop and release audio input and output.

• stopDspThread

  public void stopDspThread()

  Stop the thread.

• suspendDsp

  public void suspendDsp()

  Suspend DSP: - stop audio input. - stop audio output.

• resumeDsp

  public void resumeDsp()

  Resume audio processing.

• isProcessing

  public boolean isProcessing()

  Returns:

  Whether audio processing is enabled.

• isSuspended

  public boolean isSuspended()

  Returns:

  Whether DSP is suspended.

• isStopped

  public boolean isStopped()

  Returns:

  Whether DPS is stopped.