2 * RTP muxer chaining code
3 * Copyright (c) 2010 Martin Storsjo
5 * This file is part of Libav.
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #include "avio_internal.h"
24 #include "rtpenc_chain.h"
25 #include "avio_internal.h"
27 #include "libavutil/opt.h"
29 int ff_rtp_chain_mux_open(AVFormatContext **out, AVFormatContext *s,
30 AVStream *st, URLContext *handle, int packet_size,
33 AVFormatContext *rtpctx = NULL;
35 AVOutputFormat *rtp_format = av_guess_format("rtp", NULL, NULL);
37 AVDictionary *opts = NULL;
40 ret = AVERROR(ENOSYS);
44 /* Allocate an AVFormatContext for each output stream */
45 rtpctx = avformat_alloc_context();
47 ret = AVERROR(ENOMEM);
51 rtpctx->oformat = rtp_format;
52 if (!avformat_new_stream(rtpctx, NULL)) {
53 ret = AVERROR(ENOMEM);
56 /* Pass the interrupt callback on */
57 rtpctx->interrupt_callback = s->interrupt_callback;
58 /* Copy the max delay setting; the rtp muxer reads this. */
59 rtpctx->max_delay = s->max_delay;
60 /* Copy other stream parameters. */
61 rtpctx->streams[0]->sample_aspect_ratio = st->sample_aspect_ratio;
62 /* Get the payload type from the codec */
63 if (st->id < RTP_PT_PRIVATE)
64 rtpctx->streams[0]->id =
65 ff_rtp_get_payload_type(s, st->codec, idx);
67 rtpctx->streams[0]->id = st->id;
69 if (av_opt_get(s, "rtpflags", AV_OPT_SEARCH_CHILDREN, &rtpflags) >= 0)
70 av_dict_set(&opts, "rtpflags", rtpflags, AV_DICT_DONT_STRDUP_VAL);
72 /* Set the synchronized start time. */
73 rtpctx->start_time_realtime = s->start_time_realtime;
75 avcodec_copy_context(rtpctx->streams[0]->codec, st->codec);
76 rtpctx->streams[0]->time_base = st->time_base;
79 ret = ffio_fdopen(&rtpctx->pb, handle);
83 ret = ffio_open_dyn_packet_buf(&rtpctx->pb, packet_size);
85 ret = avformat_write_header(rtpctx, &opts);
89 if (handle && rtpctx->pb) {
90 avio_close(rtpctx->pb);
91 } else if (rtpctx->pb) {
93 avio_close_dyn_buf(rtpctx->pb, &ptr);
96 avformat_free_context(rtpctx);