f0e4dae8ebc30c7a89c37b34186a711dfb0a428e
[libav.git] / libavformat / rtpenc_chain.c
1 /*
2 * RTP muxer chaining code
3 * Copyright (c) 2010 Martin Storsjo
4 *
5 * This file is part of Libav.
6 *
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.
11 *
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.
16 *
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
20 */
21
22 #include "avformat.h"
23 #include "avio_internal.h"
24 #include "rtpenc_chain.h"
25 #include "avio_internal.h"
26 #include "libavutil/opt.h"
27
28 AVFormatContext *ff_rtp_chain_mux_open(AVFormatContext *s, AVStream *st,
29 URLContext *handle, int packet_size)
30 {
31 AVFormatContext *rtpctx;
32 int ret;
33 AVOutputFormat *rtp_format = av_guess_format("rtp", NULL, NULL);
34 uint8_t *rtpflags;
35 AVDictionary *opts = NULL;
36
37 if (!rtp_format)
38 return NULL;
39
40 /* Allocate an AVFormatContext for each output stream */
41 rtpctx = avformat_alloc_context();
42 if (!rtpctx)
43 return NULL;
44
45 rtpctx->oformat = rtp_format;
46 if (!avformat_new_stream(rtpctx, NULL)) {
47 av_free(rtpctx);
48 return NULL;
49 }
50 /* Copy the max delay setting; the rtp muxer reads this. */
51 rtpctx->max_delay = s->max_delay;
52 /* Copy other stream parameters. */
53 rtpctx->streams[0]->sample_aspect_ratio = st->sample_aspect_ratio;
54
55 if (av_opt_get(s, "rtpflags", AV_OPT_SEARCH_CHILDREN, &rtpflags) >= 0)
56 av_dict_set(&opts, "rtpflags", rtpflags, AV_DICT_DONT_STRDUP_VAL);
57
58 /* Set the synchronized start time. */
59 rtpctx->start_time_realtime = s->start_time_realtime;
60
61 avcodec_copy_context(rtpctx->streams[0]->codec, st->codec);
62
63 if (handle) {
64 ffio_fdopen(&rtpctx->pb, handle);
65 } else
66 ffio_open_dyn_packet_buf(&rtpctx->pb, packet_size);
67 ret = avformat_write_header(rtpctx, &opts);
68 av_dict_free(&opts);
69
70 if (ret) {
71 if (handle) {
72 avio_close(rtpctx->pb);
73 } else {
74 uint8_t *ptr;
75 avio_close_dyn_buf(rtpctx->pb, &ptr);
76 av_free(ptr);
77 }
78 avformat_free_context(rtpctx);
79 return NULL;
80 }
81
82 return rtpctx;
83 }
84