Interface ISpeexDSPEchoCanceler

A Speexdsp echo cancellation interface.

Inherited Members
Namespace: SpeexDSPSharp.Core.Interfaces
Assembly: SpeexDSPSharp.Core.dll
Syntax
public interface ISpeexDSPEchoCanceler : IDisposable

Methods

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Ctl<T>(EchoCancellationCtl, ref T)

Performs a ctl request.

Declaration
int Ctl<T>(EchoCancellationCtl request, ref T value) where T : unmanaged
Parameters
Type Name Description
EchoCancellationCtl request

The request you want to specify.
T value

The input/output value.
Returns
Type Description
int

0 if no error, -1 if request is unknown.
Type Parameters
Name Description
T

The type you want to input/output.
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EchoCancel(byte[], byte[], byte[])

Performs echo cancellation a frame, based on the audio sent to the speaker (no delay is added to playback in this form).

Declaration
void EchoCancel(byte[] rec, byte[] play, byte[] output)
Parameters
Type Name Description
byte[] rec

Signal from the microphone (near end + far end echo).
byte[] play

Signal played to the speaker (received from far end).
byte[] output

Returns near-end signal with echo removed.
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EchoCancel(short[], short[], short[])

Performs echo cancellation a frame, based on the audio sent to the speaker (no delay is added to playback in this form).

Declaration
void EchoCancel(short[] rec, short[] play, short[] output)
Parameters
Type Name Description
short[] rec

Signal from the microphone (near end + far end echo).
short[] play

Signal played to the speaker (received from far end).
short[] output

Returns near-end signal with echo removed.
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EchoCancel(float[], float[], float[])

Performs echo cancellation a frame, based on the audio sent to the speaker (no delay is added to playback in this form).

Declaration
void EchoCancel(float[] rec, float[] play, float[] output)
Parameters
Type Name Description
float[] rec

Signal from the microphone (near end + far end echo).
float[] play

Signal played to the speaker (received from far end).
float[] output

Returns near-end signal with echo removed.
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EchoCapture(byte[], byte[])

Perform echo cancellation using internal playback buffer, which is delayed by two frames to account for the delay introduced by most sound cards (but it could be off!).

Declaration
void EchoCapture(byte[] rec, byte[] output)
Parameters
Type Name Description
byte[] rec

Signal from the microphone (near end + far end echo).
byte[] output

Returns near-end signal with echo removed.
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EchoCapture(short[], short[])

Perform echo cancellation using internal playback buffer, which is delayed by two frames to account for the delay introduced by most sound cards (but it could be off!).

Declaration
void EchoCapture(short[] rec, short[] output)
Parameters
Type Name Description
short[] rec

Signal from the microphone (near end + far end echo).
short[] output

Returns near-end signal with echo removed.
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EchoCapture(float[], float[])

Perform echo cancellation using internal playback buffer, which is delayed by two frames to account for the delay introduced by most sound cards (but it could be off!).

Declaration
void EchoCapture(float[] rec, float[] output)
Parameters
Type Name Description
float[] rec

Signal from the microphone (near end + far end echo).
float[] output

Returns near-end signal with echo removed.
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EchoPlayback(byte[])

Let the echo canceler know that a frame was just queued to the sound card.

Declaration
void EchoPlayback(byte[] play)
Parameters
Type Name Description
byte[] play

Signal played to the speaker (received from far end).
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EchoPlayback(short[])

Let the echo canceler know that a frame was just queued to the sound card.

Declaration
void EchoPlayback(short[] play)
Parameters
Type Name Description
short[] play

Signal played to the speaker (received from far end).
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EchoPlayback(float[])

Let the echo canceler know that a frame was just queued to the sound card.

Declaration
void EchoPlayback(float[] play)
Parameters
Type Name Description
float[] play

Signal played to the speaker (received from far end).
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Reset()

Reset the echo canceler to its original state.

Declaration
void Reset()