FFmpeg: libavformat/microdvdenc.c Source File

FFmpeg

[フレーム]

libavformat

microdvdenc.c

Go to the documentation of this file.

1 /*

2 * MicroDVD subtitle muxer

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 <inttypes.h>

23 #include "avformat.h"

24 #include "internal.h"

26 static int microdvd_write_header(struct AVFormatContext *s)

27 {

28 AVCodecContext *avctx = s->streams[0]->codec;

29 AVRational tb = avctx->time_base;

31 if (s->nb_streams != 1 || avctx->codec_id != AV_CODEC_ID_MICRODVD) {

32 av_log(s, AV_LOG_ERROR, "Exactly one MicroDVD stream is needed.\n");

33 return -1;

34 }

36 if (avctx->extradata && avctx->extradata_size > 0) {

37 avio_write(s->pb, "{DEFAULT}{}", 11);

38 avio_write(s->pb, avctx->extradata, avctx->extradata_size);

39 avio_flush(s->pb);

40 }

42 avpriv_set_pts_info(s->streams[0], 64, tb.num, tb.den);

43 return 0;

44 }

46 static int microdvd_write_packet(AVFormatContext *avf, AVPacket *pkt)

47 {

48 avio_printf(avf->pb, "{%"PRId64"}", pkt->pts);

49 if (pkt->duration < 0)

50 avio_write(avf->pb, "{}", 2);

51 else

52 avio_printf(avf->pb, "{%"PRId64"}", pkt->pts + pkt->duration);

53 avio_write(avf->pb, pkt->data, pkt->size);

54 avio_write(avf->pb, "\n", 1);

55 return 0;

56 }

58 AVOutputFormat ff_microdvd_muxer = {

59 .name = "microdvd",

60 .long_name = NULL_IF_CONFIG_SMALL("MicroDVD subtitle format"),

61 .mime_type = "text/x-microdvd",

62 .extensions = "sub",

63 .write_header = microdvd_write_header,

64 .write_packet = microdvd_write_packet,

65 .flags = AVFMT_NOTIMESTAMPS,

66 .subtitle_codec = AV_CODEC_ID_MICRODVD,

67 };

Generated on Sun Mar 8 2015 02:35:10 for FFmpeg by doxygen 1.8.2