FFmpeg
libavcodec
msgsmdec.c
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/*
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* gsm 06.10 decoder, Microsoft variant
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* Copyright (c) 2010 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#define BITSTREAM_READER_LE
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#include "
avcodec.h
"
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#include "
gsm.h
"
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#include "
msgsmdec.h
"
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#include "
gsmdec_template.c
"
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int
ff_msgsm_decode_block
(
AVCodecContext
*avctx, int16_t *
samples
,
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const
uint8_t *buf,
int
mode
)
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{
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int
res;
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GetBitContext
gb;
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init_get_bits
(&gb, buf,
GSM_MS_BLOCK_SIZE
* 8);
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res =
gsm_decode_block
(avctx,
samples
, &gb,
mode
);
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if
(res < 0)
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return
res;
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return
gsm_decode_block
(avctx,
samples
+
GSM_FRAME_SIZE
, &gb,
mode
);
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}
gsmdec_template.c
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:441
mode
mode
Definition:
ebur128.h:83
samples
Filter the word “frame” indicates either a video frame or a group of audio samples
Definition:
filter_design.txt:8
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1.8.17