librempeg/libavcodec/msgsmdec.c
Reimar Döffinger 645e75992d Fix GSM decoding: regular GSM and MSGSM do not use the same
bitstream endianness, so they cannot reuse the same code
without a lot of function call overhead.
Thus use templating to compile two different binaries.

Originally committed as revision 25312 to svn://svn.ffmpeg.org/ffmpeg/trunk
2010-10-02 09:51:26 +00:00

38 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 FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#define ALT_BITSTREAM_READER_LE
#include "avcodec.h"
#include "msgsmdec.h"
#include "gsmdec_template.c"
int ff_msgsm_decode_block(AVCodecContext *avctx, int16_t *samples,
const uint8_t *buf)
{
int res;
GetBitContext gb;
init_get_bits(&gb, buf, GSM_MS_BLOCK_SIZE * 8);
res = gsm_decode_block(avctx, samples, &gb);
if (res < 0)
return res;
return gsm_decode_block(avctx, samples + GSM_FRAME_SIZE, &gb);
}