Imported Debian version 2.5.0~trusty1.1
[deb_ffmpeg.git] / ffmpeg / libavcodec / sipr.h
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 {
49 MODE_16k,
50 MODE_8k5,
51 MODE_6k5,
52 MODE_5k0,
53 MODE_COUNT
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
63 } SiprParameters;
64
65 typedef struct SiprContext {
66 AVCodecContext *avctx;
67
68 SiprMode mode;
69
70 float past_pitch_gain;
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;
85 float postfilter_agc;
86 float postfilter_mem5k0[PITCH_DELAY_MAX + LP_FILTER_ORDER];
87 float postfilter_syn5k0[LP_FILTER_ORDER + SUBFR_SIZE*5];
88
89 /* 16k */
90 int pitch_lag_prev;
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
98 void (*decode_frame)(struct SiprContext *ctx, SiprParameters *params,
99 float *out_data);
100 } SiprContext;
101
102 extern const float ff_pow_0_5[16];
103
104 void ff_sipr_init_16k(SiprContext *ctx);
105
106 void ff_sipr_decode_frame_16k(SiprContext *ctx, SiprParameters *params,
107 float *out_data);
108
109 #endif /* AVCODEC_SIPR_H */