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libavformat
rtpdec_mpeg12.c
Go to the documentation of this file.
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/*
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* Common code for the RTP depacketization of MPEG-1/2 formats.
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* Copyright (c) 2002 Fabrice Bellard
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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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#include "
libavutil/attributes.h
"
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#include "
libavutil/intreadwrite.h
"
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#include "
rtpdec_formats.h
"
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static
av_cold
int
mpeg_init
(
AVFormatContext
*ctx,
int
st_index,
PayloadContext
*
data
)
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{
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if
(st_index < 0)
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return
0;
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ctx->
streams
[st_index]->
need_parsing
=
AVSTREAM_PARSE_FULL
;
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return
0;
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}
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static
int
mpeg_parse_packet
(
AVFormatContext
*ctx,
PayloadContext
*
data
,
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AVStream
*st,
AVPacket
*
pkt
, uint32_t *timestamp,
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const
uint8_t
*
buf
,
int
len
, uint16_t seq,
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int
flags
)
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{
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unsigned
int
h;
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if
(len <= 4)
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return
AVERROR_INVALIDDATA
;
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h =
AV_RB32
(buf);
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buf += 4;
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len -= 4;
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if
(st->
codec
->
codec_type
==
AVMEDIA_TYPE_VIDEO
&& h & (1 << 26)) {
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/* MPEG-2 */
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if
(len <= 4)
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return
AVERROR_INVALIDDATA
;
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buf += 4;
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len -= 4;
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}
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if
(
av_new_packet
(pkt, len) < 0)
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return
AVERROR
(ENOMEM);
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memcpy(pkt->
data
, buf, len);
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pkt->
stream_index
= st->
index
;
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return
0;
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}
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RTPDynamicProtocolHandler
ff_mpeg_audio_dynamic_handler
= {
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.
codec_type
=
AVMEDIA_TYPE_AUDIO
,
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.codec_id =
AV_CODEC_ID_MP3
,
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.init =
mpeg_init
,
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.parse_packet =
mpeg_parse_packet
,
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.static_payload_id = 14,
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};
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RTPDynamicProtocolHandler
ff_mpeg_video_dynamic_handler
= {
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.
codec_type
=
AVMEDIA_TYPE_VIDEO
,
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.codec_id =
AV_CODEC_ID_MPEG2VIDEO
,
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.init =
mpeg_init
,
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.parse_packet =
mpeg_parse_packet
,
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.static_payload_id = 32,
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};
Generated on Wed Jul 10 2013 23:48:14 for FFmpeg by
1.8.2