mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-12 19:18:44 +02:00
120 lines
3.4 KiB
C
120 lines
3.4 KiB
C
/*
|
|
* 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
|
|
* PJS (Phoenix Japanimation Society) subtitles format demuxer
|
|
*
|
|
* @see http://subs.com.ru/page.php?al=pjs
|
|
*/
|
|
|
|
#include "avformat.h"
|
|
#include "internal.h"
|
|
#include "subtitles.h"
|
|
|
|
typedef struct {
|
|
FFDemuxSubtitlesQueue q;
|
|
} PJSContext;
|
|
|
|
static int pjs_probe(const AVProbeData *p)
|
|
{
|
|
char c;
|
|
int64_t start, end;
|
|
const unsigned char *ptr = p->buf;
|
|
|
|
if (sscanf(ptr, "%"SCNd64",%"SCNd64",%c", &start, &end, &c) == 3) {
|
|
size_t q1pos = strcspn(ptr, "\"");
|
|
size_t q2pos = q1pos + strcspn(ptr + q1pos + 1, "\"") + 1;
|
|
if (strcspn(ptr, "\r\n") > q2pos)
|
|
return AVPROBE_SCORE_MAX;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int64_t read_ts(char **line, int *duration)
|
|
{
|
|
int64_t start, end;
|
|
|
|
if (sscanf(*line, "%"SCNd64",%"SCNd64, &start, &end) == 2) {
|
|
*line += strcspn(*line, "\"");
|
|
*line += !!**line;
|
|
if (end < start || end - (uint64_t)start > INT_MAX)
|
|
return AV_NOPTS_VALUE;
|
|
*duration = end - start;
|
|
return start;
|
|
}
|
|
return AV_NOPTS_VALUE;
|
|
}
|
|
|
|
static int pjs_read_header(AVFormatContext *s)
|
|
{
|
|
PJSContext *pjs = s->priv_data;
|
|
AVStream *st = avformat_new_stream(s, NULL);
|
|
|
|
if (!st)
|
|
return AVERROR(ENOMEM);
|
|
avpriv_set_pts_info(st, 64, 1, 10);
|
|
st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
|
|
st->codecpar->codec_id = AV_CODEC_ID_PJS;
|
|
|
|
while (!avio_feof(s->pb)) {
|
|
char line[4096];
|
|
char *p = line;
|
|
const int64_t pos = avio_tell(s->pb);
|
|
int len = ff_get_line(s->pb, line, sizeof(line));
|
|
int64_t pts_start;
|
|
int duration;
|
|
|
|
if (!len)
|
|
break;
|
|
|
|
line[strcspn(line, "\r\n")] = 0;
|
|
|
|
pts_start = read_ts(&p, &duration);
|
|
if (pts_start != AV_NOPTS_VALUE) {
|
|
AVPacket *sub;
|
|
|
|
p[strcspn(p, "\"")] = 0;
|
|
sub = ff_subtitles_queue_insert(&pjs->q, p, strlen(p), 0);
|
|
if (!sub)
|
|
return AVERROR(ENOMEM);
|
|
sub->pos = pos;
|
|
sub->pts = pts_start;
|
|
sub->duration = duration;
|
|
}
|
|
}
|
|
|
|
ff_subtitles_queue_finalize(s, &pjs->q);
|
|
return 0;
|
|
}
|
|
|
|
const AVInputFormat ff_pjs_demuxer = {
|
|
.name = "pjs",
|
|
.long_name = NULL_IF_CONFIG_SMALL("PJS (Phoenix Japanimation Society) subtitles"),
|
|
.priv_data_size = sizeof(PJSContext),
|
|
.flags_internal = FF_FMT_INIT_CLEANUP,
|
|
.read_probe = pjs_probe,
|
|
.read_header = pjs_read_header,
|
|
.extensions = "pjs",
|
|
.read_packet = ff_subtitles_read_packet,
|
|
.read_seek2 = ff_subtitles_read_seek,
|
|
.read_close = ff_subtitles_read_close,
|
|
};
|