FFmpeg: libavformat/rtpenc_chain.c Source File

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libavformat

rtpenc_chain.c

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1 /*

2 * RTP muxer chaining code

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 */

22 #include "avformat.h"

23 #include "avio_internal.h"

24 #include "rtpenc_chain.h"

25 #include "rtp.h"

26 #include "libavutil/opt.h"

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;

38 if (!rtp_format) {

39 ret = AVERROR(ENOSYS);

40 goto fail;

41 }

43 /* Allocate an AVFormatContext for each output stream */

44 rtpctx = avformat_alloc_context();

45 if (!rtpctx) {

46 ret = AVERROR(ENOMEM);

47 goto fail;

48 }

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;

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;

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);

74 /* Set the synchronized start time. */

75 rtpctx->start_time_realtime = s->start_time_realtime;

77 avcodec_copy_context(rtpctx->streams[0]->codec, st->codec);

78 rtpctx->streams[0]->time_base = st->time_base;

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);

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 }

100 *out = rtpctx;

101 return 0;

102

103 fail:

104 av_free(rtpctx);

105 if (handle)

106 ffurl_close(handle);

107 return ret;

108 }

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