Fix GSM decoding: regular GSM and MSGSM do not use the same
[libav.git] / libavcodec / gsmdec_data.h
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645e7599
RD
1/*
2 * gsm 06.10 decoder data
3 * Copyright (c) 2010 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22#ifndef GSMDEC_DATA
23#define GSMDEC_DATA
24
25#include <stdint.h>
26
27// input and output sizes in byte
28#define GSM_BLOCK_SIZE 33
29#define GSM_MS_BLOCK_SIZE 65
30#define GSM_FRAME_SIZE 160
31
32typedef struct {
33 // Contains first 120 elements from the previous frame
34 // (used by long_term_synth according to the "lag"),
35 // then in the following 160 elements the current
36 // frame is constructed.
37 int16_t ref_buf[280];
38 int v[9];
39 int lar[2][8];
40 int lar_idx;
41 int msr;
42} GSMContext;
43
44extern const uint16_t ff_gsm_long_term_gain_tab[4];
45extern const int16_t ff_gsm_dequant_tab[64][8];
46
47#endif