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Class unaSpeexDSP

Description

Hierarchy

Fields

Methods

Properties

Unit

unaSpeexAPI

Declaration

type unaSpeexDSP = class(unaObject)

Description

Speex DSP

Hierarchy

TObject
unaObject
unaSpeexDSP

Overview

Methods

	`constructor create(const libName: wString = '');`
	`destructor Destroy(); override;`
	`function open(frameSize, samplingRate: int; aec: bool = false): int;`
	`function preprocess(frame: pspx_int16_t): bool;`
	`function resampleDst(srcFrame: pspx_int16_t; var srcSamples: spx_uint32_t; outBuf: pspx_int16_t; outSamplingRate: int; var outBufUsed: spx_uint32_t): uint;`
	`function resampleSrc(srcFrame: pspx_int16_t; var srcSamples: spx_uint32_t; srcSamplingRate: int; outBuf: pspx_int16_t; var outBufUsed: spx_uint32_t): uint;`
	`function lock(timeout: tTimeout = 1000): bool;`
	`procedure close();`
	`procedure echo_capture(inFrame: pspx_int16_t; outFrame: pspx_int16_t);`
	`procedure echo_playback(frame: pspx_int16_t);`
	`procedure unlock();`

Properties

	`property active: bool read f_active;`
	`property api: pSpeexDSPLibrary_proc read getLib;`
	`property dsp_AGC: bool index 1 read dsp_getBool write dsp_setBool;`
	`property dsp_AGC_level: float read getAcgLvl;`
	`property dsp_AGC_loudness: float read getAcgLdn;`
	`property dsp_denoise: bool index 0 read dsp_getBool write dsp_setBool;`
	`property dsp_dereverb: bool index 3 read dsp_getBool write dsp_setBool;`
	`property dsp_VAD: bool index 2 read dsp_getBool write dsp_setBool;`
	`property error: int read f_error;`
	`property frameSize: int read f_frameSize;`
	`property lastFrameVAD: bool read f_lfv;`
	`property libOK: bool read f_libOK;`
	`property samplingRate: int read f_sps;`

Description

Methods

	`constructor create(const libName: wString = '');`
Creates Speex DSP instance.

	`destructor Destroy(); override;`
Destroys Speex DSP instance.

function open(frameSize, samplingRate: int; aec: bool = false): int;

Open DSP instance.

Parameters

frameSize: size of one frame in samples
samplingRate: sampling rate
aec: enable AEC module

Returns

0 or errorCode

function preprocess(frame: pspx_int16_t): bool;

Preprocesses a frame.

Parameters

frame: audio samples (must be 16 bit/mono)

Returns

True for voice, false for silence/noise (only if VAD is enabled)

	`function resampleDst(srcFrame: pspx_int16_t; var srcSamples: spx_uint32_t; outBuf: pspx_int16_t; outSamplingRate: int; var outBufUsed: spx_uint32_t): uint;`

function resampleSrc(srcFrame: pspx_int16_t; var srcSamples: spx_uint32_t; srcSamplingRate: int; outBuf: pspx_int16_t; var outBufUsed: spx_uint32_t): uint;

Resamples a frame.

Parameters

srcFrame: audio samples (must be 16 bit/mono) to be resampled
srcSamples: number of samples in srcFrame
srcSamplingRate: source sampling rate
outBuf: destination buffer
outBufUsed: number of samples written into outBuf

Returns

number of samples read from srcFrame

	`function lock(timeout: tTimeout = 1000): bool;`

	`procedure close();`
Close DSP instance.

	`procedure echo_capture(inFrame: pspx_int16_t; outFrame: pspx_int16_t);`

	`procedure echo_playback(frame: pspx_int16_t);`

	`procedure unlock();`

Properties

	`property active: bool read f_active;`

	`property api: pSpeexDSPLibrary_proc read getLib;`
Speex proc.

	`property dsp_AGC: bool index 1 read dsp_getBool write dsp_setBool;`
SPEEX_PREPROCESS_GET_AGC/SPEEX_PREPROCESS_SET_AGC

	`property dsp_AGC_level: float read getAcgLvl;`
SPEEX_PREPROCESS_GET_AGC_LEVEL/SPEEX_PREPROCESS_SET_AGC_LEVEL

	`property dsp_AGC_loudness: float read getAcgLdn;`
SPEEX_PREPROCESS_GET_AGC_LOUDNESS /SPEEX_PREPROCESS_SET_AGC_LOUDNESS

	`property dsp_denoise: bool index 0 read dsp_getBool write dsp_setBool;`
SPEEX_PREPROCESS_GET_DENOISE/SPEEX_PREPROCESS_GET_DENOISE

	`property dsp_dereverb: bool index 3 read dsp_getBool write dsp_setBool;`
SPEEX_PREPROCESS_GET_VAD/SPEEX_PREPROCESS_SET_VAD

	`property dsp_VAD: bool index 2 read dsp_getBool write dsp_setBool;`
SPEEX_PREPROCESS_GET_VAD/SPEEX_PREPROCESS_SET_VAD

	`property error: int read f_error;`
Last error.

	`property frameSize: int read f_frameSize;`
Frame size (in samples) the DSP was initialized with

	`property lastFrameVAD: bool read f_lfv;`
True for voice, false for silence/noise (only if VAD is enabled).

	`property libOK: bool read f_libOK;`

	`property samplingRate: int read f_sps;`
Sampling rate the DSP was initialized with

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