avio: make url_open_dyn_packet_buf internal.
[libav.git] / libavformat / rtpenc_chain.c
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1/*
2 * RTP muxer chaining code
3 * Copyright (c) 2010 Martin Storsjo
4 *
2912e87a 5 * This file is part of Libav.
a493f80a 6 *
2912e87a 7 * Libav is free software; you can redistribute it and/or
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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 *
2912e87a 12 * Libav is distributed in the hope that it will be useful,
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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
2912e87a 18 * License along with Libav; if not, write to the Free Software
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19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22#include "avformat.h"
23#include "rtpenc_chain.h"
403ee835 24#include "avio_internal.h"
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25
26AVFormatContext *ff_rtp_chain_mux_open(AVFormatContext *s, AVStream *st,
27 URLContext *handle, int packet_size)
28{
29 AVFormatContext *rtpctx;
30 int ret;
31 AVOutputFormat *rtp_format = av_guess_format("rtp", NULL, NULL);
32
33 if (!rtp_format)
34 return NULL;
35
36 /* Allocate an AVFormatContext for each output stream */
37 rtpctx = avformat_alloc_context();
38 if (!rtpctx)
39 return NULL;
40
41 rtpctx->oformat = rtp_format;
42 if (!av_new_stream(rtpctx, 0)) {
43 av_free(rtpctx);
44 return NULL;
45 }
46 /* Copy the max delay setting; the rtp muxer reads this. */
47 rtpctx->max_delay = s->max_delay;
48 /* Copy other stream parameters. */
49 rtpctx->streams[0]->sample_aspect_ratio = st->sample_aspect_ratio;
50
51 /* Set the synchronized start time. */
52 rtpctx->start_time_realtime = s->start_time_realtime;
53
1338dc08 54 avcodec_copy_context(rtpctx->streams[0]->codec, st->codec);
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55
56 if (handle) {
57 url_fdopen(&rtpctx->pb, handle);
58 } else
403ee835 59 ffio_open_dyn_packet_buf(&rtpctx->pb, packet_size);
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60 ret = av_write_header(rtpctx);
61
62 if (ret) {
63 if (handle) {
22a3212e 64 avio_close(rtpctx->pb);
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65 } else {
66 uint8_t *ptr;
6dc7d80d 67 avio_close_dyn_buf(rtpctx->pb, &ptr);
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68 av_free(ptr);
69 }
b22dbb29 70 avformat_free_context(rtpctx);
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71 return NULL;
72 }
73
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74 return rtpctx;
75}
76