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 "libavutil/opt.h"
27
28AVFormatContext *ff_rtp_chain_mux_open(AVFormatContext *s, AVStream *st,
29                                       URLContext *handle, int packet_size)
30{
31    AVFormatContext *rtpctx;
32    int ret;
33    AVOutputFormat *rtp_format = av_guess_format("rtp", NULL, NULL);
34    uint8_t *rtpflags;
35    AVDictionary *opts = NULL;
36
37    if (!rtp_format)
38        return NULL;
39
40    /* Allocate an AVFormatContext for each output stream */
41    rtpctx = avformat_alloc_context();
42    if (!rtpctx)
43        return NULL;
44
45    rtpctx->oformat = rtp_format;
46    if (!avformat_new_stream(rtpctx, NULL)) {
47        av_free(rtpctx);
48        return NULL;
49    }
50    /* Pass the interrupt callback on */
51    rtpctx->interrupt_callback = s->interrupt_callback;
52    /* Copy the max delay setting; the rtp muxer reads this. */
53    rtpctx->max_delay = s->max_delay;
54    /* Copy other stream parameters. */
55    rtpctx->streams[0]->sample_aspect_ratio = st->sample_aspect_ratio;
56
57    if (av_opt_get(s, "rtpflags", AV_OPT_SEARCH_CHILDREN, &rtpflags) >= 0)
58        av_dict_set(&opts, "rtpflags", rtpflags, AV_DICT_DONT_STRDUP_VAL);
59
60    /* Set the synchronized start time. */
61    rtpctx->start_time_realtime = s->start_time_realtime;
62
63    avcodec_copy_context(rtpctx->streams[0]->codec, st->codec);
64
65    if (handle) {
66        ffio_fdopen(&rtpctx->pb, handle);
67    } else
68        ffio_open_dyn_packet_buf(&rtpctx->pb, packet_size);
69    ret = avformat_write_header(rtpctx, &opts);
70    av_dict_free(&opts);
71
72    if (ret) {
73        if (handle) {
74            avio_close(rtpctx->pb);
75        } else {
76            uint8_t *ptr;
77            avio_close_dyn_buf(rtpctx->pb, &ptr);
78            av_free(ptr);
79        }
80        avformat_free_context(rtpctx);
81        return NULL;
82    }
83
84    return rtpctx;
85}
86
87