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105 lines
3.1 KiB
105 lines
3.1 KiB
/* |
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* Copyright (c) 2012 Clément Bœsch |
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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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/** |
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* @file |
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* SubViewer v1 subtitle demuxer |
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*/ |
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#include "avformat.h" |
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#include "demux.h" |
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#include "internal.h" |
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#include "subtitles.h" |
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typedef struct { |
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FFDemuxSubtitlesQueue q; |
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} SubViewer1Context; |
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static int subviewer1_probe(const AVProbeData *p) |
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{ |
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const unsigned char *ptr = p->buf; |
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if (strstr(ptr, "******** START SCRIPT ********")) |
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return AVPROBE_SCORE_EXTENSION; |
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return 0; |
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} |
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static int subviewer1_read_header(AVFormatContext *s) |
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{ |
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int delay = 0; |
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AVPacket *sub = NULL; |
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SubViewer1Context *subviewer1 = s->priv_data; |
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AVStream *st = avformat_new_stream(s, NULL); |
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if (!st) |
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return AVERROR(ENOMEM); |
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avpriv_set_pts_info(st, 64, 1, 1); |
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st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE; |
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st->codecpar->codec_id = AV_CODEC_ID_SUBVIEWER1; |
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while (!avio_feof(s->pb)) { |
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char line[4096]; |
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int len = ff_get_line(s->pb, line, sizeof(line)); |
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int hh, mm, ss; |
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if (!len) |
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break; |
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if (!strncmp(line, "[DELAY]", 7)) { |
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ff_get_line(s->pb, line, sizeof(line)); |
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sscanf(line, "%d", &delay); |
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} |
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if (sscanf(line, "[%d:%d:%d]", &hh, &mm, &ss) == 3) { |
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const int64_t pos = avio_tell(s->pb); |
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int64_t pts_start = hh*3600LL + mm*60LL + ss + delay; |
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len = ff_get_line(s->pb, line, sizeof(line)); |
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line[strcspn(line, "\r\n")] = 0; |
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if (!*line) { |
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if (sub) |
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sub->duration = pts_start - sub->pts; |
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} else { |
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sub = ff_subtitles_queue_insert(&subviewer1->q, line, len, 0); |
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if (!sub) |
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return AVERROR(ENOMEM); |
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sub->pos = pos; |
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sub->pts = pts_start; |
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sub->duration = -1; |
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} |
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} |
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} |
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ff_subtitles_queue_finalize(s, &subviewer1->q); |
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return 0; |
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} |
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const FFInputFormat ff_subviewer1_demuxer = { |
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.p.name = "subviewer1", |
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.p.long_name = NULL_IF_CONFIG_SMALL("SubViewer v1 subtitle format"), |
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.p.extensions = "sub", |
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.priv_data_size = sizeof(SubViewer1Context), |
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.flags_internal = FF_INFMT_FLAG_INIT_CLEANUP, |
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.read_probe = subviewer1_probe, |
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.read_header = subviewer1_read_header, |
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.read_packet = ff_subtitles_read_packet, |
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.read_seek2 = ff_subtitles_read_seek, |
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.read_close = ff_subtitles_read_close, |
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};
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