FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
msgsmdec.c
Go to the documentation of this file.
1 /*
2  * gsm 06.10 decoder, Microsoft variant
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 #define BITSTREAM_READER_LE
23 #include "avcodec.h"
24 #include "msgsmdec.h"
25 #include "gsm.h"
26 #include "gsmdec_template.c"
27 
28 int ff_msgsm_decode_block(AVCodecContext *avctx, int16_t *samples,
29  const uint8_t *buf, int mode)
30 {
31  int res;
32  GetBitContext gb;
33  init_get_bits(&gb, buf, GSM_MS_BLOCK_SIZE * 8);
34  res = gsm_decode_block(avctx, samples, &gb, mode);
35  if (res < 0)
36  return res;
37  return gsm_decode_block(avctx, samples + GSM_FRAME_SIZE, &gb, mode);
38 }
#define GSM_FRAME_SIZE
Definition: gsm.h:30
uint8_t
mode
Definition: f_perms.c:27
#define GSM_MS_BLOCK_SIZE
Definition: gsm.h:26
static int gsm_decode_block(AVCodecContext *avctx, int16_t *samples, GetBitContext *gb, int mode)
int ff_msgsm_decode_block(AVCodecContext *avctx, int16_t *samples, const uint8_t *buf, int mode)
Definition: msgsmdec.c:28
GSM decoder.
Libavcodec external API header.
main external API structure.
Definition: avcodec.h:1642
void * buf
Definition: avisynth_c.h:553
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:418