mirror of
https://github.com/xenia-project/FFmpeg.git
synced 2024-11-24 03:59:43 +00:00
542562e5ab
A parser should never be called with a mismatching codec Found-by: Ganesh Ajjanagadde <gajjanag@mit.edu> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
92 lines
2.5 KiB
C
92 lines
2.5 KiB
C
/*
|
|
* Copyright (c) 2012 Justin Ruggles
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* GSM audio parser
|
|
*
|
|
* Splits packets into individual blocks.
|
|
*/
|
|
|
|
#include "libavutil/avassert.h"
|
|
#include "parser.h"
|
|
#include "gsm.h"
|
|
|
|
typedef struct GSMParseContext {
|
|
ParseContext pc;
|
|
int block_size;
|
|
int duration;
|
|
int remaining;
|
|
} GSMParseContext;
|
|
|
|
static int gsm_parse(AVCodecParserContext *s1, AVCodecContext *avctx,
|
|
const uint8_t **poutbuf, int *poutbuf_size,
|
|
const uint8_t *buf, int buf_size)
|
|
{
|
|
GSMParseContext *s = s1->priv_data;
|
|
ParseContext *pc = &s->pc;
|
|
int next;
|
|
|
|
if (!s->block_size) {
|
|
switch (avctx->codec_id) {
|
|
case AV_CODEC_ID_GSM:
|
|
s->block_size = GSM_BLOCK_SIZE;
|
|
s->duration = GSM_FRAME_SIZE;
|
|
break;
|
|
case AV_CODEC_ID_GSM_MS:
|
|
s->block_size = avctx->block_align ? avctx->block_align
|
|
: GSM_MS_BLOCK_SIZE;
|
|
s->duration = GSM_FRAME_SIZE * 2;
|
|
break;
|
|
default:
|
|
av_assert0(0);
|
|
}
|
|
}
|
|
|
|
if (!s->remaining)
|
|
s->remaining = s->block_size;
|
|
if (s->remaining <= buf_size) {
|
|
next = s->remaining;
|
|
s->remaining = 0;
|
|
} else {
|
|
next = END_NOT_FOUND;
|
|
s->remaining -= buf_size;
|
|
}
|
|
|
|
if (ff_combine_frame(pc, next, &buf, &buf_size) < 0 || !buf_size) {
|
|
*poutbuf = NULL;
|
|
*poutbuf_size = 0;
|
|
return buf_size;
|
|
}
|
|
|
|
s1->duration = s->duration;
|
|
|
|
*poutbuf = buf;
|
|
*poutbuf_size = buf_size;
|
|
return next;
|
|
}
|
|
|
|
AVCodecParser ff_gsm_parser = {
|
|
.codec_ids = { AV_CODEC_ID_GSM, AV_CODEC_ID_GSM_MS },
|
|
.priv_data_size = sizeof(GSMParseContext),
|
|
.parser_parse = gsm_parse,
|
|
.parser_close = ff_parse_close,
|
|
};
|