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                                    size_t 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_ */
66