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e37f161e66
* qatar/master: (71 commits) movenc: Allow writing to a non-seekable output if using empty moov movenc: Support adding isml (smooth streaming live) metadata libavcodec: Don't crash in avcodec_encode_audio if time_base isn't set sunrast: Document the different Sun Raster file format types. sunrast: Add a check for experimental type. libspeexenc: use AVSampleFormat instead of deprecated/removed SampleFormat lavf: remove disabled FF_API_SET_PTS_INFO cruft lavf: remove disabled FF_API_OLD_INTERRUPT_CB cruft lavf: remove disabled FF_API_REORDER_PRIVATE cruft lavf: remove disabled FF_API_SEEK_PUBLIC cruft lavf: remove disabled FF_API_STREAM_COPY cruft lavf: remove disabled FF_API_PRELOAD cruft lavf: remove disabled FF_API_NEW_STREAM cruft lavf: remove disabled FF_API_RTSP_URL_OPTIONS cruft lavf: remove disabled FF_API_MUXRATE cruft lavf: remove disabled FF_API_FILESIZE cruft lavf: remove disabled FF_API_TIMESTAMP cruft lavf: remove disabled FF_API_LOOP_OUTPUT cruft lavf: remove disabled FF_API_LOOP_INPUT cruft lavf: remove disabled FF_API_AVSTREAM_QUALITY cruft ... Conflicts: doc/APIchanges libavcodec/8bps.c libavcodec/avcodec.h libavcodec/libx264.c libavcodec/mjpegbdec.c libavcodec/options.c libavcodec/sunrast.c libavcodec/utils.c libavcodec/version.h libavcodec/x86/h264_deblock.asm libavdevice/libdc1394.c libavdevice/v4l2.c libavformat/avformat.h libavformat/avio.c libavformat/avio.h libavformat/aviobuf.c libavformat/dv.c libavformat/mov.c libavformat/utils.c libavformat/version.h libavformat/wtv.c libavutil/Makefile libavutil/file.c libswscale/x86/input.asm libswscale/x86/swscale_mmx.c libswscale/x86/swscale_template.c tests/ref/lavf/ffm Merged-by: Michael Niedermayer <michaelni@gmx.at>
103 lines
2.9 KiB
C
103 lines
2.9 KiB
C
/*
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* SubRip subtitle demuxer
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* Copyright (c) 2010 Aurelien Jacobs <aurel@gnuage.org>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "avformat.h"
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#include "internal.h"
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#include "libavutil/intreadwrite.h"
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static int srt_probe(AVProbeData *p)
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{
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unsigned char *ptr = p->buf;
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int i, v, num = 0;
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if (AV_RB24(ptr) == 0xEFBBBF)
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ptr += 3; /* skip UTF-8 BOM */
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for (i=0; i<2; i++) {
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if (num == i && sscanf(ptr, "%*d:%*2d:%*2d%*1[,.]%*3d --> %*d:%*2d:%*2d%*1[,.]%3d", &v) == 1)
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return AVPROBE_SCORE_MAX;
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num = atoi(ptr);
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ptr += strcspn(ptr, "\n") + 1;
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}
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return 0;
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}
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static int srt_read_header(AVFormatContext *s)
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{
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AVStream *st = avformat_new_stream(s, NULL);
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if (!st)
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return -1;
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avpriv_set_pts_info(st, 64, 1, 1000);
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st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
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st->codec->codec_id = CODEC_ID_SRT;
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return 0;
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}
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static int64_t get_pts(const char *buf)
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{
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int i, v, hour, min, sec, hsec;
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for (i=0; i<2; i++) {
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if (sscanf(buf, "%d:%2d:%2d%*1[,.]%3d --> %*d:%*2d:%*2d%*1[,.]%3d",
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&hour, &min, &sec, &hsec, &v) == 5) {
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min += 60*hour;
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sec += 60*min;
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return sec*1000+hsec;
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}
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buf += strcspn(buf, "\n") + 1;
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}
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return AV_NOPTS_VALUE;
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}
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static inline int is_eol(char c)
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{
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return c == '\r' || c == '\n';
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}
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static int srt_read_packet(AVFormatContext *s, AVPacket *pkt)
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{
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char buffer[2048], *ptr = buffer, *ptr2;
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int64_t pos = avio_tell(s->pb);
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int res = AVERROR_EOF;
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do {
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ptr2 = ptr;
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ptr += ff_get_line(s->pb, ptr, sizeof(buffer)+buffer-ptr);
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} while (!is_eol(*ptr2) && !url_feof(s->pb) && ptr-buffer<sizeof(buffer)-1);
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if (buffer[0] && !(res = av_new_packet(pkt, ptr-buffer))) {
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memcpy(pkt->data, buffer, pkt->size);
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pkt->flags |= AV_PKT_FLAG_KEY;
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pkt->pos = pos;
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pkt->pts = pkt->dts = get_pts(pkt->data);
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}
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return res;
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}
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AVInputFormat ff_srt_demuxer = {
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.name = "srt",
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.long_name = NULL_IF_CONFIG_SMALL("SubRip subtitle format"),
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.read_probe = srt_probe,
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.read_header = srt_read_header,
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.read_packet = srt_read_packet,
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.flags = AVFMT_GENERIC_INDEX,
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};
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