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1338dc0823
This avoids having the chained AVStream->codec point to the same AVCodecContext owned by the outer AVStream. The downside is that changes to the AVCodecContext made after calling av_write_header cannot be detected automatically within the chained muxer. This avoids having to manually unlink the chained AVStream->codec by setting it to null before freeing the chained muxer via generic freeing functions. Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
82 lines
2.5 KiB
C
82 lines
2.5 KiB
C
/*
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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 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 "avformat.h"
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#include "rtpenc_chain.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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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 (!av_new_stream(rtpctx, 0)) {
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av_free(rtpctx);
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return NULL;
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}
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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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/* 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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url_fdopen(&rtpctx->pb, handle);
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} else
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url_open_dyn_packet_buf(&rtpctx->pb, packet_size);
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ret = av_write_header(rtpctx);
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if (ret) {
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if (handle) {
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url_fclose(rtpctx->pb);
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} else {
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uint8_t *ptr;
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url_close_dyn_buf(rtpctx->pb, &ptr);
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av_free(ptr);
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}
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av_free(rtpctx->streams[0]->codec->extradata);
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av_free(rtpctx->streams[0]->codec);
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av_free(rtpctx->streams[0]->info);
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av_free(rtpctx->streams[0]);
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av_free(rtpctx);
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return NULL;
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}
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/* Copy the RTP AVStream timebase back to the original AVStream */
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st->time_base = rtpctx->streams[0]->time_base;
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return rtpctx;
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}
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