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2ba45a60 DM |
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; | |
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->codec, 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_copy_context(rtpctx->streams[0]->codec, st->codec); | |
f6fa7814 | 78 | rtpctx->streams[0]->time_base = st->time_base; |
2ba45a60 DM |
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_close(rtpctx->pb); | |
93 | } else if (rtpctx->pb) { | |
94 | uint8_t *ptr; | |
95 | avio_close_dyn_buf(rtpctx->pb, &ptr); | |
96 | av_free(ptr); | |
97 | } | |
98 | avformat_free_context(rtpctx); | |
99 | return ret; | |
100 | } | |
101 | ||
102 | *out = rtpctx; | |
103 | return 0; | |
104 | ||
105 | fail: | |
106 | av_free(rtpctx); | |
107 | if (handle) | |
108 | ffurl_close(handle); | |
109 | return ret; | |
110 | } |