FFmpeg/libavcodec/msgsmdec.c
Kostya Shishkov a16577d985 MSN Audio support
This is essentially a MS GSM decoder extension that supports more
sampling rates and lower bitrates.

Signed-off-by: Anton Khirnov <anton@khirnov.net>
2013-11-26 08:31:10 +01:00

39 lines
1.3 KiB
C

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