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Diffstat (limited to 'pjmedia/src/pjmedia-codec/speex/speex_preprocess.h')
| -rw-r--r-- | pjmedia/src/pjmedia-codec/speex/speex_preprocess.h | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/pjmedia/src/pjmedia-codec/speex/speex_preprocess.h b/pjmedia/src/pjmedia-codec/speex/speex_preprocess.h new file mode 100644 index 00000000..5bb3a2c4 --- /dev/null +++ b/pjmedia/src/pjmedia-codec/speex/speex_preprocess.h @@ -0,0 +1,171 @@ +/* Copyright (C) 2003 Epic Games + Written by Jean-Marc Valin */ +/** + @file speex_preprocess.h + @brief Speex preprocessor +*/ +/* + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions are + met: + + 1. Redistributions of source code must retain the above copyright notice, + this list of conditions and the following disclaimer. + + 2. Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + + 3. The name of the author may not be used to endorse or promote products + derived from this software without specific prior written permission. + + THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, + INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + POSSIBILITY OF SUCH DAMAGE. +*/ + +#ifndef SPEEX_PREPROCESS_H +#define SPEEX_PREPROCESS_H + +#include "speex/speex_types.h" + +#ifdef __cplusplus +extern "C" { +#endif + +struct drft_lookup; + +/** Speex pre-processor state. */ +typedef struct SpeexPreprocessState { + int frame_size; /**< Number of samples processed each time */ + int ps_size; /**< Number of points in the power spectrum */ + int sampling_rate; /**< Sampling rate of the input/output */ + + /* parameters */ + int denoise_enabled; + int agc_enabled; + float agc_level; + int vad_enabled; + int dereverb_enabled; + float reverb_decay; + float reverb_level; + float speech_prob_start; + float speech_prob_continue; + + float *frame; /**< Processing frame (2*ps_size) */ + float *ps; /**< Current power spectrum */ + float *gain2; /**< Adjusted gains */ + float *window; /**< Analysis/Synthesis window */ + float *noise; /**< Noise estimate */ + float *reverb_estimate; /**< Estimate of reverb energy */ + float *old_ps; /**< Power spectrum for last frame */ + float *gain; /**< Ephraim Malah gain */ + float *prior; /**< A-priori SNR */ + float *post; /**< A-posteriori SNR */ + + float *S; /**< Smoothed power spectrum */ + float *Smin; /**< See Cohen paper */ + float *Stmp; /**< See Cohen paper */ + float *update_prob; /**< Propability of speech presence for noise update */ + + float *zeta; /**< Smoothed a priori SNR */ + float Zpeak; + float Zlast; + + float *loudness_weight; /**< Perceptual loudness curve */ + + float *echo_noise; + + float *noise_bands; + float *noise_bands2; + int noise_bandsN; + float *speech_bands; + float *speech_bands2; + int speech_bandsN; + + float *inbuf; /**< Input buffer (overlapped analysis) */ + float *outbuf; /**< Output buffer (for overlap and add) */ + + float speech_prob; + int last_speech; + float loudness; /**< loudness estimate */ + float loudness2; /**< loudness estimate */ + int nb_adapt; /**< Number of frames used for adaptation so far */ + int nb_loudness_adapt; /**< Number of frames used for loudness adaptation so far */ + int consec_noise; /**< Number of consecutive noise frames */ + int nb_preprocess; /**< Number of frames processed so far */ + struct drft_lookup *fft_lookup; /**< Lookup table for the FFT */ + +} SpeexPreprocessState; + +/** Creates a new preprocessing state */ +SpeexPreprocessState *speex_preprocess_state_init(int frame_size, int sampling_rate); + +/** Destroys a denoising state */ +void speex_preprocess_state_destroy(SpeexPreprocessState *st); + +/** Preprocess a frame */ +int speex_preprocess(SpeexPreprocessState *st, spx_int16_t *x, spx_int32_t *echo); + +/** Preprocess a frame */ +void speex_preprocess_estimate_update(SpeexPreprocessState *st, spx_int16_t *x, spx_int32_t *echo); + +/** Used like the ioctl function to control the preprocessor parameters */ +int speex_preprocess_ctl(SpeexPreprocessState *st, int request, void *ptr); + + + +/** Set preprocessor denoiser state */ +#define SPEEX_PREPROCESS_SET_DENOISE 0 +/** Get preprocessor denoiser state */ +#define SPEEX_PREPROCESS_GET_DENOISE 1 + +/** Set preprocessor Automatic Gain Control state */ +#define SPEEX_PREPROCESS_SET_AGC 2 +/** Get preprocessor Automatic Gain Control state */ +#define SPEEX_PREPROCESS_GET_AGC 3 + +/** Set preprocessor Voice Activity Detection state */ +#define SPEEX_PREPROCESS_SET_VAD 4 +/** Get preprocessor Voice Activity Detection state */ +#define SPEEX_PREPROCESS_GET_VAD 5 + +/** Set preprocessor Automatic Gain Control level */ +#define SPEEX_PREPROCESS_SET_AGC_LEVEL 6 +/** Get preprocessor Automatic Gain Control level */ +#define SPEEX_PREPROCESS_GET_AGC_LEVEL 7 + +/** Set preprocessor dereverb state */ +#define SPEEX_PREPROCESS_SET_DEREVERB 8 +/** Get preprocessor dereverb state */ +#define SPEEX_PREPROCESS_GET_DEREVERB 9 + +/** Set preprocessor dereverb level */ +#define SPEEX_PREPROCESS_SET_DEREVERB_LEVEL 10 +/** Get preprocessor dereverb level */ +#define SPEEX_PREPROCESS_GET_DEREVERB_LEVEL 11 + +/** Set preprocessor dereverb decay */ +#define SPEEX_PREPROCESS_SET_DEREVERB_DECAY 12 +/** Get preprocessor dereverb decay */ +#define SPEEX_PREPROCESS_GET_DEREVERB_DECAY 13 + +#define SPEEX_PREPROCESS_SET_PROB_START 14 +#define SPEEX_PREPROCESS_GET_PROB_START 15 + +#define SPEEX_PREPROCESS_SET_PROB_CONTINUE 16 +#define SPEEX_PREPROCESS_GET_PROB_CONTINUE 17 + +#ifdef __cplusplus +} +#endif + +#endif |