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 "avio_internal.h"

26 #include "rtp.h"

27 #include "libavutil/opt.h"

29 int ff_rtp_chain_mux_open(AVFormatContext **out, AVFormatContext *s,

30 AVStream *st, URLContext *handle, int packet_size,

31 int idx)

32 {

33 AVFormatContext *rtpctx = NULL;

34 int ret;

35 AVOutputFormat *rtp_format = av_guess_format("rtp", NULL, NULL);

36 uint8_t *rtpflags;

37 AVDictionary *opts = NULL;

39 if (!rtp_format) {

40 ret = AVERROR(ENOSYS);

41 goto fail;

42 }

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

45 rtpctx = avformat_alloc_context();

46 if (!rtpctx) {

47 ret = AVERROR(ENOMEM);

48 goto fail;

49 }

51 rtpctx->oformat = rtp_format;

52 if (!avformat_new_stream(rtpctx, NULL)) {

53 ret = AVERROR(ENOMEM);

54 goto fail;

55 }

56 /* Pass the interrupt callback on */

57 rtpctx->interrupt_callback = s->interrupt_callback;

58 /* Copy the max delay setting; the rtp muxer reads this. */

59 rtpctx->max_delay = s->max_delay;

60 /* Copy other stream parameters. */

61 rtpctx->streams[0]->sample_aspect_ratio = st->sample_aspect_ratio;

62 rtpctx->flags |= s->flags & AVFMT_FLAG_MP4A_LATM;

64 /* Get the payload type from the codec */

65 if (st->id < RTP_PT_PRIVATE)

66 rtpctx->streams[0]->id =

67 ff_rtp_get_payload_type(s, st->codec, idx);

68 else

69 rtpctx->streams[0]->id = st->id;

72 if (av_opt_get(s, "rtpflags", AV_OPT_SEARCH_CHILDREN, &rtpflags) >= 0)

73 av_dict_set(&opts, "rtpflags", rtpflags, AV_DICT_DONT_STRDUP_VAL);

75 /* Set the synchronized start time. */

76 rtpctx->start_time_realtime = s->start_time_realtime;

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

80 if (handle) {

81 ffio_fdopen(&rtpctx->pb, handle);

82 } else

83 ffio_open_dyn_packet_buf(&rtpctx->pb, packet_size);

84 ret = avformat_write_header(rtpctx, &opts);

85 av_dict_free(&opts);

87 if (ret) {

88 if (handle) {

89 avio_close(rtpctx->pb);

90 } else {

91 uint8_t *ptr;

92 avio_close_dyn_buf(rtpctx->pb, &ptr);

93 av_free(ptr);

94 }

95 avformat_free_context(rtpctx);

96 return ret;

97 }

99 *out = rtpctx;

100 return 0;

101

102 fail:

103 av_free(rtpctx);

104 if (handle)

105 ffurl_close(handle);

106 return ret;

107 }

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