blob: f768fb002ebcb67ed43ac843f9e00d551f252b0e
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 | |
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 | 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_MP4A_LATM | AVFMT_FLAG_BITEXACT); |
62 | |
63 | /* Get the payload type from the codec */ |
64 | if (st->id < RTP_PT_PRIVATE) |
65 | rtpctx->streams[0]->id = |
66 | ff_rtp_get_payload_type(s, st->codecpar, idx); |
67 | else |
68 | rtpctx->streams[0]->id = st->id; |
69 | |
70 | |
71 | if (av_opt_get(s, "rtpflags", AV_OPT_SEARCH_CHILDREN, &rtpflags) >= 0) |
72 | av_dict_set(&opts, "rtpflags", rtpflags, AV_DICT_DONT_STRDUP_VAL); |
73 | |
74 | /* Set the synchronized start time. */ |
75 | rtpctx->start_time_realtime = s->start_time_realtime; |
76 | |
77 | avcodec_parameters_copy(rtpctx->streams[0]->codecpar, st->codecpar); |
78 | rtpctx->streams[0]->time_base = st->time_base; |
79 | |
80 | if (handle) { |
81 | ret = ffio_fdopen(&rtpctx->pb, handle); |
82 | if (ret < 0) |
83 | ffurl_close(handle); |
84 | } else |
85 | ret = ffio_open_dyn_packet_buf(&rtpctx->pb, packet_size); |
86 | if (!ret) |
87 | ret = avformat_write_header(rtpctx, &opts); |
88 | av_dict_free(&opts); |
89 | |
90 | if (ret) { |
91 | if (handle && rtpctx->pb) { |
92 | avio_closep(&rtpctx->pb); |
93 | } else if (rtpctx->pb) { |
94 | ffio_free_dyn_buf(&rtpctx->pb); |
95 | } |
96 | avformat_free_context(rtpctx); |
97 | return ret; |
98 | } |
99 | |
100 | *out = rtpctx; |
101 | return 0; |
102 | |
103 | fail: |
104 | av_free(rtpctx); |
105 | if (handle) |
106 | ffurl_close(handle); |
107 | return ret; |
108 | } |
109 |