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ffmpeg / libavformat / rtpenc_chain.c @ 1338dc08

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1 a493f80a Martin Storsjö
/*
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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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}