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
23void 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
29void WebRtcIsacfix_InitialPitch(const int16_t *in,
30                                PitchAnalysisStruct *State,
31                                int16_t *qlags);
32
33void 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
40void 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
51void WebRtcIsacfix_PitchFilterGains(const int16_t *indatQ0,
52                                    PitchFiltstr *pfp,
53                                    int16_t *lagsQ7,
54                                    int16_t *gainsQ12);
55
56void 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
61int32_t WebRtcIsacfix_Log2Q8( uint32_t x );
62
63void WebRtcIsacfix_PCorr2Q32(const int16_t* in, int32_t* logcorQ8);
64
65#endif /* WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_FIX_SOURCE_PITCH_ESTIMATOR_H_ */
66