rtp: set the payload type as stream id
[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 "rtp.h"
27 #include "libavutil/opt.h"
28
29 int ff_rtp_chain_mux_open(AVFormatContext **out, AVFormatContext *s,
30 AVStream *st, URLContext *handle, int packet_size,
31 int idx)
32 {
33 AVFormatContext *rtpctx = NULL;
34 int ret, pt;
35 AVOutputFormat *rtp_format = av_guess_format("rtp", NULL, NULL);
36 uint8_t *rtpflags;
37 AVDictionary *opts = NULL;
38
39 if (!rtp_format) {
40 ret = AVERROR(ENOSYS);
41 goto fail;
42 }
43
44 /* Allocate an AVFormatContext for each output stream */
45 rtpctx = avformat_alloc_context();
46 if (!rtpctx) {
47 ret = AVERROR(ENOMEM);
48 goto fail;
49 }
50
51 rtpctx->oformat = rtp_format;
52 if (!avformat_new_stream(rtpctx, NULL)) {
53 ret = AVERROR(ENOMEM);
54 goto fail;
55 }
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(rtpctx, st->codec, idx);
66 else
67 rtpctx->streams[0]->id = st->id;
68
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);
71
72 /* Set the synchronized start time. */
73 rtpctx->start_time_realtime = s->start_time_realtime;
74
75 avcodec_copy_context(rtpctx->streams[0]->codec, st->codec);
76
77 if (handle) {
78 ffio_fdopen(&rtpctx->pb, handle);
79 } else
80 ffio_open_dyn_packet_buf(&rtpctx->pb, packet_size);
81 ret = avformat_write_header(rtpctx, &opts);
82 av_dict_free(&opts);
83
84 if (ret) {
85 if (handle) {
86 avio_close(rtpctx->pb);
87 } else {
88 uint8_t *ptr;
89 avio_close_dyn_buf(rtpctx->pb, &ptr);
90 av_free(ptr);
91 }
92 avformat_free_context(rtpctx);
93 return ret;
94 }
95
96 *out = rtpctx;
97 return 0;
98
99 fail:
100 av_free(rtpctx);
101 if (handle)
102 ffurl_close(handle);
103 return ret;
104 }