mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
105 lines
3.1 KiB
105 lines
3.1 KiB
/* |
|
* Copyright (c) 2012 Clément Bœsch |
|
* |
|
* This file is part of FFmpeg. |
|
* |
|
* FFmpeg is free software; you can redistribute it and/or |
|
* modify it under the terms of the GNU Lesser General Public |
|
* License as published by the Free Software Foundation; either |
|
* version 2.1 of the License, or (at your option) any later version. |
|
* |
|
* FFmpeg is distributed in the hope that it will be useful, |
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|
* Lesser General Public License for more details. |
|
* |
|
* You should have received a copy of the GNU Lesser General Public |
|
* License along with FFmpeg; if not, write to the Free Software |
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
|
*/ |
|
|
|
/** |
|
* @file |
|
* SubViewer v1 subtitle demuxer |
|
*/ |
|
|
|
#include "avformat.h" |
|
#include "demux.h" |
|
#include "internal.h" |
|
#include "subtitles.h" |
|
|
|
typedef struct { |
|
FFDemuxSubtitlesQueue q; |
|
} SubViewer1Context; |
|
|
|
static int subviewer1_probe(const AVProbeData *p) |
|
{ |
|
const unsigned char *ptr = p->buf; |
|
|
|
if (strstr(ptr, "******** START SCRIPT ********")) |
|
return AVPROBE_SCORE_EXTENSION; |
|
return 0; |
|
} |
|
|
|
static int subviewer1_read_header(AVFormatContext *s) |
|
{ |
|
int delay = 0; |
|
AVPacket *sub = NULL; |
|
SubViewer1Context *subviewer1 = s->priv_data; |
|
AVStream *st = avformat_new_stream(s, NULL); |
|
|
|
if (!st) |
|
return AVERROR(ENOMEM); |
|
avpriv_set_pts_info(st, 64, 1, 1); |
|
st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE; |
|
st->codecpar->codec_id = AV_CODEC_ID_SUBVIEWER1; |
|
|
|
while (!avio_feof(s->pb)) { |
|
char line[4096]; |
|
int len = ff_get_line(s->pb, line, sizeof(line)); |
|
int hh, mm, ss; |
|
|
|
if (!len) |
|
break; |
|
|
|
if (!strncmp(line, "[DELAY]", 7)) { |
|
ff_get_line(s->pb, line, sizeof(line)); |
|
sscanf(line, "%d", &delay); |
|
} |
|
|
|
if (sscanf(line, "[%d:%d:%d]", &hh, &mm, &ss) == 3) { |
|
const int64_t pos = avio_tell(s->pb); |
|
int64_t pts_start = hh*3600LL + mm*60LL + ss + delay; |
|
|
|
len = ff_get_line(s->pb, line, sizeof(line)); |
|
line[strcspn(line, "\r\n")] = 0; |
|
if (!*line) { |
|
if (sub) |
|
sub->duration = pts_start - sub->pts; |
|
} else { |
|
sub = ff_subtitles_queue_insert(&subviewer1->q, line, len, 0); |
|
if (!sub) |
|
return AVERROR(ENOMEM); |
|
sub->pos = pos; |
|
sub->pts = pts_start; |
|
sub->duration = -1; |
|
} |
|
} |
|
} |
|
|
|
ff_subtitles_queue_finalize(s, &subviewer1->q); |
|
return 0; |
|
} |
|
|
|
const FFInputFormat ff_subviewer1_demuxer = { |
|
.p.name = "subviewer1", |
|
.p.long_name = NULL_IF_CONFIG_SMALL("SubViewer v1 subtitle format"), |
|
.p.extensions = "sub", |
|
.priv_data_size = sizeof(SubViewer1Context), |
|
.flags_internal = FF_FMT_INIT_CLEANUP, |
|
.read_probe = subviewer1_probe, |
|
.read_header = subviewer1_read_header, |
|
.read_packet = ff_subtitles_read_packet, |
|
.read_seek2 = ff_subtitles_read_seek, |
|
.read_close = ff_subtitles_read_close, |
|
};
|
|
|