1 /*
2 * RTP muxer chaining code
3 * Copyright (c) 2010 Martin Storsjo
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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 "rtp.h"
26 #include "libavutil/opt.h"
27
ff_rtp_chain_mux_open(AVFormatContext ** out,AVFormatContext * s,AVStream * st,URLContext * handle,int packet_size,int idx)28 int ff_rtp_chain_mux_open(AVFormatContext **out, AVFormatContext *s,
29 AVStream *st, URLContext *handle, int packet_size,
30 int idx)
31 {
32 AVFormatContext *rtpctx = NULL;
33 int ret;
34 ff_const59 AVOutputFormat *rtp_format = av_guess_format("rtp", NULL, NULL);
35 uint8_t *rtpflags;
36 AVDictionary *opts = NULL;
37
38 if (!rtp_format) {
39 ret = AVERROR(ENOSYS);
40 goto fail;
41 }
42
43 /* Allocate an AVFormatContext for each output stream */
44 rtpctx = avformat_alloc_context();
45 if (!rtpctx) {
46 ret = AVERROR(ENOMEM);
47 goto fail;
48 }
49
50 rtpctx->oformat = rtp_format;
51 if (!avformat_new_stream(rtpctx, NULL)) {
52 ret = AVERROR(ENOMEM);
53 goto fail;
54 }
55 /* Pass the interrupt callback on */
56 rtpctx->interrupt_callback = s->interrupt_callback;
57 /* Copy the max delay setting; the rtp muxer reads this. */
58 rtpctx->max_delay = s->max_delay;
59 /* Copy other stream parameters. */
60 rtpctx->streams[0]->sample_aspect_ratio = st->sample_aspect_ratio;
61 rtpctx->flags |= s->flags & AVFMT_FLAG_BITEXACT;
62 rtpctx->strict_std_compliance = s->strict_std_compliance;
63
64 /* Get the payload type from the codec */
65 if (st->id < RTP_PT_PRIVATE)
66 rtpctx->streams[0]->id =
67 ff_rtp_get_payload_type(s, st->codecpar, idx);
68 else
69 rtpctx->streams[0]->id = st->id;
70
71
72 if (av_opt_get(s, "rtpflags", AV_OPT_SEARCH_CHILDREN, &rtpflags) >= 0)
73 av_dict_set(&opts, "rtpflags", rtpflags, AV_DICT_DONT_STRDUP_VAL);
74
75 /* Set the synchronized start time. */
76 rtpctx->start_time_realtime = s->start_time_realtime;
77
78 avcodec_parameters_copy(rtpctx->streams[0]->codecpar, st->codecpar);
79 rtpctx->streams[0]->time_base = st->time_base;
80
81 if (handle) {
82 ret = ffio_fdopen(&rtpctx->pb, handle);
83 if (ret < 0)
84 ffurl_close(handle);
85 } else
86 ret = ffio_open_dyn_packet_buf(&rtpctx->pb, packet_size);
87 if (!ret)
88 ret = avformat_write_header(rtpctx, &opts);
89 av_dict_free(&opts);
90
91 if (ret) {
92 if (handle && rtpctx->pb) {
93 avio_closep(&rtpctx->pb);
94 } else if (rtpctx->pb) {
95 ffio_free_dyn_buf(&rtpctx->pb);
96 }
97 avformat_free_context(rtpctx);
98 return ret;
99 }
100
101 *out = rtpctx;
102 return 0;
103
104 fail:
105 avformat_free_context(rtpctx);
106 if (handle)
107 ffurl_close(handle);
108 return ret;
109 }
110