FFmpeg
libavcodec
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 "
gsm.h
"
25
#include "
msgsmdec.h
"
26
27
#include "
gsmdec_template.c
"
28
29
int
ff_msgsm_decode_block
(
AVCodecContext
*avctx, int16_t *
samples
,
30
const
uint8_t *buf,
int
mode
)
31
{
32
int
res;
33
GetBitContext
gb;
34
init_get_bits
(&gb, buf,
GSM_MS_BLOCK_SIZE
* 8);
35
res =
gsm_decode_block
(avctx,
samples
, &gb,
mode
);
36
if
(res < 0)
37
return
res;
38
return
gsm_decode_block
(avctx,
samples
+
GSM_FRAME_SIZE
, &gb,
mode
);
39
}
gsmdec_template.c
mode
Definition:
swscale.c:52
init_get_bits
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition:
get_bits.h:514
ff_msgsm_decode_block
int ff_msgsm_decode_block(AVCodecContext *avctx, int16_t *samples, const uint8_t *buf, int mode)
Definition:
msgsmdec.c:29
GetBitContext
Definition:
get_bits.h:108
GSM_FRAME_SIZE
#define GSM_FRAME_SIZE
Definition:
gsm.h:30
msgsmdec.h
gsm.h
GSM_MS_BLOCK_SIZE
#define GSM_MS_BLOCK_SIZE
Definition:
gsm.h:26
gsm_decode_block
static int gsm_decode_block(AVCodecContext *avctx, int16_t *samples, GetBitContext *gb, int mode)
Definition:
gsmdec_template.c:122
avcodec.h
AVCodecContext
main external API structure.
Definition:
avcodec.h:451
samples
Filter the word “frame” indicates either a video frame or a group of audio samples
Definition:
filter_design.txt:8
Generated on Mon Dec 2 2024 19:22:01 for FFmpeg by
1.8.17