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libavformat
rtpenc_chain.c
Go to the documentation of this file.
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/*
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* RTP muxer chaining code
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* Copyright (c) 2010 Martin Storsjo
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*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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 "
avformat.h
"
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#include "
avio_internal.h
"
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#include "
rtpenc_chain.h
"
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#include "
avio_internal.h
"
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#include "
libavutil/opt.h
"
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AVFormatContext
*
ff_rtp_chain_mux_open
(
AVFormatContext
*s,
AVStream
*
st
,
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URLContext
*handle,
int
packet_size)
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{
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AVFormatContext
*rtpctx;
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int
ret;
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AVOutputFormat
*rtp_format =
av_guess_format
(
"rtp"
,
NULL
,
NULL
);
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uint8_t *rtpflags;
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AVDictionary
*opts =
NULL
;
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if
(!rtp_format)
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return
NULL
;
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/* Allocate an AVFormatContext for each output stream */
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rtpctx =
avformat_alloc_context
();
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if
(!rtpctx)
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return
NULL
;
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rtpctx->
oformat
= rtp_format;
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if
(!
avformat_new_stream
(rtpctx,
NULL
)) {
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av_free
(rtpctx);
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return
NULL
;
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}
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/* Pass the interrupt callback on */
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rtpctx->
interrupt_callback
= s->
interrupt_callback
;
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/* Copy the max delay setting; the rtp muxer reads this. */
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rtpctx->
max_delay
= s->
max_delay
;
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/* Copy other stream parameters. */
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rtpctx->
streams
[0]->
sample_aspect_ratio
= st->
sample_aspect_ratio
;
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if
(
av_opt_get
(s,
"rtpflags"
,
AV_OPT_SEARCH_CHILDREN
, &rtpflags) >= 0)
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av_dict_set
(&opts,
"rtpflags"
, rtpflags,
AV_DICT_DONT_STRDUP_VAL
);
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/* Set the synchronized start time. */
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rtpctx->
start_time_realtime
= s->
start_time_realtime
;
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avcodec_copy_context
(rtpctx->
streams
[0]->
codec
, st->
codec
);
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if
(handle) {
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ffio_fdopen
(&rtpctx->
pb
, handle);
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}
else
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ffio_open_dyn_packet_buf
(&rtpctx->
pb
, packet_size);
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ret =
avformat_write_header
(rtpctx, &opts);
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av_dict_free
(&opts);
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if
(ret) {
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if
(handle) {
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avio_close
(rtpctx->
pb
);
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}
else
{
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uint8_t *ptr;
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avio_close_dyn_buf
(rtpctx->
pb
, &ptr);
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av_free
(ptr);
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}
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avformat_free_context
(rtpctx);
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return
NULL
;
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}
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return
rtpctx;
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}
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