dsplib.h

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//  
// Copyright (C) 2006 SIPez LLC. 
// Licensed to SIPfoundry under a Contributor Agreement. 
//
// Copyright (C) 2004-2006 SIPfoundry Inc.
// Licensed by SIPfoundry under the LGPL license.
//
// Copyright (C) 2004-2006 Pingtel Corp.  All rights reserved.
// Licensed to SIPfoundry under a Contributor Agreement.
//
// $$

#ifndef __INCdsplib_h /* [ */
#define __INCdsplib_h

#include "mp/MpBuf.h"
#include "mp/MpTypes.h"

#ifdef __cplusplus
extern "C" {
#endif

/* comfort noise generator assume the max size of processing frame is 80 */
#define SAMPLES_PER_FRAME 80

// -----------------------------------------------------
// Comfort Noise Generator module used by MprDecode
// -----------------------------------------------------
extern void init_CNG();

extern void white_noise_generator(MpAudioSample *shpSamples,
                                  int            iLength,
                                  uint32_t       ulNoiseLevelAve);

extern void comfort_noise_generator(MpAudioSample *shpSamples,
                                    int            iLength,
                                    uint32_t       ulNoiseLevelAve);

extern void background_noise_level_estimation(uint32_t      &shNoiseLevel,
                                              MpAudioSample *shpSamples,
                                              int            iLength);


#ifdef NEVER_GOT_USED /* [ */
extern void dspCopy32Sto16S(const int* src, short* dst, int count);

extern void dspCopy16Sto32S(const short* src, int* dst, int count);

/* dot product of an array of 32 bit samples by 32 bit coefficients */
extern int64_t dspDotProd32x32(const int* v1, const int* v2,
                               int count, int64_t* res = 0);

#endif /* NEVER_GOT_USED ] */

#define dspDotProd32S dspDotProd16x32

/* dot product of an array of 16 bit samples by 32 bit coefficients */
extern int64_t dspDotProd16x32(const short* v1, const int* v2,
                               int count, int64_t* res = 0);

/* special version that skips every other item in v1 */
extern int64_t dspDotProd16skip32(const short* v1, const int* v2,
                                  int count, int64_t* res = 0);

/* Coefficient update routines */
extern void dspCoeffUpdate16x32(const short* v1, int* v2,
                               int count, int factor);

extern void dspCoeffUpdate16skip32(const short* v1, int* v2,
                               int count, int factor);


typedef struct 
   {
      int r;
      int i;
   } icomplex;

extern int imagsq(icomplex* x, int PreRightShift);

extern void complexInnerProduct(icomplex *ResultPtr,
               icomplex *CoeffPtr, icomplex *DLPtr, int EcIndex);

extern void complexCoefUpdate5(icomplex *NormedErrPtr,
               icomplex *CoeffPtr, icomplex *DLPtr, int EcIndex, int* Shifts);

#ifdef __cplusplus
}
#endif

#endif /* __INCdsplib_h ] */