FFmpeg
sipr.h
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1 /*
2  * SIPR / ACELP.NET decoder
3  *
4  * Copyright (c) 2008 Vladimir Voroshilov
5  * Copyright (c) 2009 Vitor Sessak
6  *
7  * This file is part of FFmpeg.
8  *
9  * FFmpeg is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License as published by the Free Software Foundation; either
12  * version 2.1 of the License, or (at your option) any later version.
13  *
14  * FFmpeg is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17  * Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with FFmpeg; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22  */
23 
24 #ifndef AVCODEC_SIPR_H
25 #define AVCODEC_SIPR_H
26 
27 #include "avcodec.h"
28 #include "acelp_pitch_delay.h"
29 #include "libavutil/mem.h"
30 
31 #define LP_FILTER_ORDER_16k 16
32 #define L_SUBFR_16k 80
33 #define PITCH_MIN 30
34 #define PITCH_MAX 281
35 
36 #define LSFQ_DIFF_MIN (0.0125 * M_PI)
37 
38 #define LP_FILTER_ORDER 10
39 
40 /** Number of past samples needed for excitation interpolation */
41 #define L_INTERPOL (LP_FILTER_ORDER + 1)
42 
43 /** Subframe size for all modes except 16k */
44 #define SUBFR_SIZE 48
45 
46 #define SUBFRAME_COUNT_16k 2
47 
48 typedef enum {
54 } SiprMode;
55 
56 typedef struct SiprParameters {
57  int ma_pred_switch; ///< switched moving average predictor
58  int vq_indexes[5];
59  int pitch_delay[5]; ///< pitch delay
60  int gp_index[5]; ///< adaptive-codebook gain indexes
61  int16_t fc_indexes[5][10]; ///< fixed-codebook indexes
62  int gc_index[5]; ///< fixed-codebook gain indexes
64 
65 typedef struct SiprContext {
67 
69 
71  float lsf_history[LP_FILTER_ORDER_16k];
72 
73  float excitation[L_INTERPOL + PITCH_MAX + 2 * L_SUBFR_16k];
74 
75  DECLARE_ALIGNED(16, float, synth_buf)[LP_FILTER_ORDER + 5*SUBFR_SIZE + 6];
76 
77  float lsp_history[LP_FILTER_ORDER];
78  float gain_mem;
79  float energy_history[4];
80  float highpass_filt_mem[2];
81  float postfilter_mem[PITCH_DELAY_MAX + LP_FILTER_ORDER];
82 
83  /* 5k0 */
84  float tilt_mem;
86  float postfilter_mem5k0[PITCH_DELAY_MAX + LP_FILTER_ORDER];
87  float postfilter_syn5k0[LP_FILTER_ORDER + SUBFR_SIZE*5];
88 
89  /* 16k */
91  float iir_mem[LP_FILTER_ORDER_16k+1];
92  float filt_buf[2][LP_FILTER_ORDER_16k+1];
93  float *filt_mem[2];
94  float mem_preemph[LP_FILTER_ORDER_16k];
95  float synth[LP_FILTER_ORDER_16k];
96  double lsp_history_16k[16];
97 
99  float *out_data);
100 } SiprContext;
101 
102 extern const float ff_pow_0_5[16];
103 
105 
107  float *out_data);
108 
109 #endif /* AVCODEC_SIPR_H */
int gp_index[5]
adaptive-codebook gain indexes
Definition: sipr.h:60
int pitch_delay[5]
pitch delay
Definition: sipr.h:59
int vq_indexes[5]
Definition: sipr.h:58
Definition: sipr.h:50
int pitch_lag_prev
Definition: sipr.h:90
#define SUBFR_SIZE
Subframe size for all modes except 16k.
Definition: sipr.h:44
Memory handling functions.
SiprMode
Definition: sipr.h:48
#define PITCH_DELAY_MAX
#define L_INTERPOL
Number of past samples needed for excitation interpolation.
Definition: sipr.h:41
#define DECLARE_ALIGNED(n, t, v)
Declare a variable that is aligned in memory.
Definition: mem.h:112
Definition: sipr.h:49
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: 4xm.c:834
Definition: sipr.h:52
#define PITCH_MAX
Definition: sipr.h:34
AVCodecContext * avctx
Definition: sipr.h:66
GLenum GLint * params
Definition: opengl_enc.c:113
Definition: sipr.h:51
#define LP_FILTER_ORDER
Definition: sipr.h:38
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
AVFormatContext * ctx
Definition: movenc.c:48
#define L_SUBFR_16k
Definition: sipr.h:32
int16_t fc_indexes[5][10]
fixed-codebook indexes
Definition: sipr.h:61
Libavcodec external API header.
main external API structure.
Definition: avcodec.h:1571
int gc_index[5]
fixed-codebook gain indexes
Definition: sipr.h:62
float gain_mem
Definition: sipr.h:78
void ff_sipr_decode_frame_16k(SiprContext *ctx, SiprParameters *params, float *out_data)
Definition: sipr16k.c:176
#define LP_FILTER_ORDER_16k
Definition: sipr.h:31
float postfilter_agc
Definition: sipr.h:85
int ma_pred_switch
switched moving average predictor
Definition: sipr.h:57
float past_pitch_gain
Definition: sipr.h:70
SiprMode mode
Definition: sipr.h:68
const float ff_pow_0_5[16]
Definition: sipr.c:135
float tilt_mem
Definition: sipr.h:84
void ff_sipr_init_16k(SiprContext *ctx)
Definition: sipr16k.c:271