Class SpeexDSPPreprocessor

Speexdsp preprocessor.

Inheritance

object

SpeexDSPPreprocessor

Implements

ISpeexDSPPreprocessor

IDisposable

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Namespace: SpeexDSPSharp.Core

Assembly: SpeexDSPSharp.Core.dll

Syntax

public class SpeexDSPPreprocessor : ISpeexDSPPreprocessor, IDisposable

Constructors

SpeexDSPPreprocessor(int, int, bool?)

Creates a new speexdsp echo canceler.

Declaration

public SpeexDSPPreprocessor(int frame_size, int sample_rate, bool? use_static = null)

Parameters

Type	Name	Description
int	frame_size	Number of samples to process at one time (should correspond to 10-20 ms). Must be the same value as that used for the echo canceler for residual echo cancellation to work.
int	sample_rate	Sampling rate used for the input.
bool?	use_static	Set to true to force static imports, false to force dynamic imports, or null to auto-select based on platform.

Fields

_preprocessor

Direct speex preprocessor for SpeexDSPPreprocessor. You can close this directly.

Declaration

protected ISpeexDSPPreprocessor _preprocessor

Field Value

Type	Description
ISpeexDSPPreprocessor

Methods

Ctl<T>(PreprocessorCtl, ref T)

Performs a ctl request.

Declaration

public int Ctl<T>(PreprocessorCtl request, ref T value) where T : unmanaged

Parameters

Type	Name	Description
PreprocessorCtl	request	The request you want to specify.
T	value	The input/output value.

Returns

Type	Description
int

Type Parameters

Name	Description
T	The type you want to input/output.

Dispose()

Declaration

public void Dispose()

EstimateUpdate(byte[])

Update preprocessor state, but do not compute the output.

Declaration

public void EstimateUpdate(byte[] x)

Parameters

Type	Name	Description
byte[]	x	Audio sample vector (in only). Must be same size as specified in SpeexDSPPreprocessor(int, int).

EstimateUpdate(short[])

Update preprocessor state, but do not compute the output.

Declaration

public void EstimateUpdate(short[] x)

Parameters

Type	Name	Description
short[]	x	Audio sample vector (in only). Must be same size as specified in SpeexDSPPreprocessor(int, int).

EstimateUpdate(float[])

Update preprocessor state, but do not compute the output.

Declaration

public void EstimateUpdate(float[] x)

Parameters

Type	Name	Description
float[]	x	Audio sample vector (in only). Must be same size as specified in SpeexDSPPreprocessor(int, int).

Run(byte[])

Preprocess a frame.

Declaration

public int Run(byte[] x)

Parameters

Type	Name	Description
byte[]	x	Audio sample vector (in and out). Must be same size as specified in SpeexDSPPreprocessor(int, int).

Returns

Type	Description
int	Bool value for voice activity (1 for speech, 0 for noise/silence), ONLY if VAD turned on.

Run(short[])

Preprocess a frame.

Declaration

public int Run(short[] x)

Parameters

Type	Name	Description
short[]	x	Audio sample vector (in and out). Must be same size as specified in SpeexDSPPreprocessor(int, int).

Returns

Type	Description
int	Bool value for voice activity (1 for speech, 0 for noise/silence), ONLY if VAD turned on.

Run(float[])

Preprocess a frame.

Declaration

public int Run(float[] x)

Parameters

Type	Name	Description
float[]	x	Audio sample vector (in and out). Must be same size as specified in SpeexDSPPreprocessor(int, int).

Returns

Type	Description
int	Bool value for voice activity (1 for speech, 0 for noise/silence), ONLY if VAD turned on.

Implements

ISpeexDSPPreprocessor

IDisposable