1
0
mirror of https://git.ffmpeg.org/ffmpeg.git synced 2024-12-30 03:12:08 +00:00
ffmpeg/libavformat/rtpdec_mpeg12.c
Andreas Rheinhardt c1e439d7e9 avformat: Forward errors where possible
It is not uncommon to find code where the caller thinks to know better
what the return value should be than the callee. E.g. something like
"if (av_new_packet(pkt, size) < 0) return AVERROR(ENOMEM);". This commit
changes several instances of this to instead forward the actual error.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
2019-12-12 19:25:33 +01:00

67 lines
2.2 KiB
C

/*
* Common code for the RTP depacketization of MPEG-1/2 formats.
* Copyright (c) 2002 Fabrice Bellard
*
* 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
*/
#include "libavutil/attributes.h"
#include "libavutil/intreadwrite.h"
#include "rtpdec_formats.h"
static int mpeg_parse_packet(AVFormatContext *ctx, PayloadContext *data,
AVStream *st, AVPacket *pkt, uint32_t *timestamp,
const uint8_t *buf, int len, uint16_t seq,
int flags)
{
unsigned int h;
int ret;
if (len <= 4)
return AVERROR_INVALIDDATA;
h = AV_RB32(buf);
buf += 4;
len -= 4;
if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && h & (1 << 26)) {
/* MPEG-2 */
if (len <= 4)
return AVERROR_INVALIDDATA;
buf += 4;
len -= 4;
}
if ((ret = av_new_packet(pkt, len)) < 0)
return ret;
memcpy(pkt->data, buf, len);
pkt->stream_index = st->index;
return 0;
}
const RTPDynamicProtocolHandler ff_mpeg_audio_dynamic_handler = {
.codec_type = AVMEDIA_TYPE_AUDIO,
.codec_id = AV_CODEC_ID_MP3,
.need_parsing = AVSTREAM_PARSE_FULL,
.parse_packet = mpeg_parse_packet,
.static_payload_id = 14,
};
const RTPDynamicProtocolHandler ff_mpeg_video_dynamic_handler = {
.codec_type = AVMEDIA_TYPE_VIDEO,
.codec_id = AV_CODEC_ID_MPEG2VIDEO,
.need_parsing = AVSTREAM_PARSE_FULL,
.parse_packet = mpeg_parse_packet,
.static_payload_id = 32,
};