src/third_party/webrtc/modules/audio_coding/codecs/isac/fix/source/pitch_estimator.h

   1 /*
   2  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
   3  *
   4  *  Use of this source code is governed by a BSD-style license
   5  *  that can be found in the LICENSE file in the root of the source
   6  *  tree. An additional intellectual property rights grant can be found
   7  *  in the file PATENTS.  All contributing project authors may
   8  *  be found in the AUTHORS file in the root of the source tree.
   9  */
  10
  11 /*
  12  * pitch_estimator.h
  13  *
  14  * Pitch functions
  15  *
  16  */
  17
  18 #ifndef WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_FIX_SOURCE_PITCH_ESTIMATOR_H_
  19 #define WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_FIX_SOURCE_PITCH_ESTIMATOR_H_
  20
  21 #include "structs.h"
  22
  23 void WebRtcIsacfix_PitchAnalysis(const int16_t *in,               /* PITCH_FRAME_LEN samples */
  24                                  int16_t *outQ0,                  /* PITCH_FRAME_LEN+QLOOKAHEAD samples */
  25                                  PitchAnalysisStruct *State,
  26                                  int16_t *lagsQ7,
  27                                  int16_t *PitchGains_Q12);
  28
  29 void WebRtcIsacfix_InitialPitch(const int16_t *in,
  30                                 PitchAnalysisStruct *State,
  31                                 int16_t *qlags);
  32
  33 void WebRtcIsacfix_PitchFilter(int16_t *indatFix,
  34                                int16_t *outdatQQ,
  35                                PitchFiltstr *pfp,
  36                                int16_t *lagsQ7,
  37                                int16_t *gainsQ12,
  38                                int16_t type);
  39
  40 void WebRtcIsacfix_PitchFilterCore(int loopNumber,
  41                                    int16_t gain,
  42                                    int index,
  43                                    int16_t sign,
  44                                    int16_t* inputState,
  45                                    int16_t* outputBuff2,
  46                                    const int16_t* coefficient,
  47                                    int16_t* inputBuf,
  48                                    int16_t* outputBuf,
  49                                    int* index2);
  50
  51 void WebRtcIsacfix_PitchFilterGains(const int16_t *indatQ0,
  52                                     PitchFiltstr *pfp,
  53                                     int16_t *lagsQ7,
  54                                     int16_t *gainsQ12);
  55
  56 void WebRtcIsacfix_DecimateAllpass32(const int16_t *in,
  57                                      int32_t *state_in,        /* array of size: 2*ALLPASSSECTIONS+1 */
  58                                      int16_t N,                   /* number of input samples */
  59                                      int16_t *out);             /* array of size N/2 */
  60
  61 int32_t WebRtcIsacfix_Log2Q8( uint32_t x );
  62
  63 void WebRtcIsacfix_PCorr2Q32(const int16_t* in, int32_t* logcorQ8);
  64
  65 #endif /* WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_FIX_SOURCE_PITCH_ESTIMATOR_H_ */