1727740f0f76c4f1082af391e60f43eb78c12db3
[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
27 AVFormatContext *ff_rtp_chain_mux_open(AVFormatContext *s, AVStream *st,
28 URLContext *handle, int packet_size)
29 {
30 AVFormatContext *rtpctx;
31 int ret;
32 AVOutputFormat *rtp_format = av_guess_format("rtp", NULL, NULL);
33
34 if (!rtp_format)
35 return NULL;
36
37 /* Allocate an AVFormatContext for each output stream */
38 rtpctx = avformat_alloc_context();
39 if (!rtpctx)
40 return NULL;
41
42 rtpctx->oformat = rtp_format;
43 if (!av_new_stream(rtpctx, 0)) {
44 av_free(rtpctx);
45 return NULL;
46 }
47 /* Copy the max delay setting; the rtp muxer reads this. */
48 rtpctx->max_delay = s->max_delay;
49 /* Copy other stream parameters. */
50 rtpctx->streams[0]->sample_aspect_ratio = st->sample_aspect_ratio;
51
52 /* Set the synchronized start time. */
53 rtpctx->start_time_realtime = s->start_time_realtime;
54
55 avcodec_copy_context(rtpctx->streams[0]->codec, st->codec);
56
57 if (handle) {
58 ffio_fdopen(&rtpctx->pb, handle);
59 } else
60 ffio_open_dyn_packet_buf(&rtpctx->pb, packet_size);
61 ret = av_write_header(rtpctx);
62
63 if (ret) {
64 if (handle) {
65 avio_close(rtpctx->pb);
66 } else {
67 uint8_t *ptr;
68 avio_close_dyn_buf(rtpctx->pb, &ptr);
69 av_free(ptr);
70 }
71 avformat_free_context(rtpctx);
72 return NULL;
73 }
74
75 return rtpctx;
76 }
77