mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-21 10:55:51 +02:00
149 lines
4.3 KiB
C
149 lines
4.3 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
|
|
* AQTitle subtitles format demuxer
|
|
*
|
|
* @see http://web.archive.org/web/20070210095721/http://www.volny.cz/aberka/czech/aqt.html
|
|
* @see https://trac.annodex.net/wiki/AQTitle
|
|
*/
|
|
|
|
#include "avformat.h"
|
|
#include "internal.h"
|
|
#include "subtitles.h"
|
|
#include "libavutil/opt.h"
|
|
|
|
typedef struct {
|
|
const AVClass *class;
|
|
FFDemuxSubtitlesQueue q;
|
|
AVRational frame_rate;
|
|
} AQTitleContext;
|
|
|
|
static int aqt_probe(AVProbeData *p)
|
|
{
|
|
int frame;
|
|
const char *ptr = p->buf;
|
|
|
|
if (sscanf(ptr, "-->> %d", &frame) == 1)
|
|
return AVPROBE_SCORE_MAX / 2;
|
|
return 0;
|
|
}
|
|
|
|
static int aqt_read_header(AVFormatContext *s)
|
|
{
|
|
AQTitleContext *aqt = s->priv_data;
|
|
AVStream *st = avformat_new_stream(s, NULL);
|
|
int new_event = 1;
|
|
int64_t pos = 0, frame = AV_NOPTS_VALUE;
|
|
AVPacket *sub = NULL;
|
|
|
|
if (!st)
|
|
return AVERROR(ENOMEM);
|
|
avpriv_set_pts_info(st, 64, aqt->frame_rate.den, aqt->frame_rate.num);
|
|
st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
|
|
st->codec->codec_id = AV_CODEC_ID_TEXT;
|
|
|
|
while (!url_feof(s->pb)) {
|
|
char line[4096];
|
|
int len = ff_get_line(s->pb, line, sizeof(line));
|
|
|
|
if (!len)
|
|
break;
|
|
|
|
line[strcspn(line, "\r\n")] = 0;
|
|
|
|
if (sscanf(line, "-->> %"SCNd64, &frame) == 1) {
|
|
new_event = 1;
|
|
pos = avio_tell(s->pb);
|
|
if (sub) {
|
|
sub->duration = frame - sub->pts;
|
|
sub = NULL;
|
|
}
|
|
} else if (*line) {
|
|
if (!new_event) {
|
|
sub = ff_subtitles_queue_insert(&aqt->q, "\n", 1, 1);
|
|
if (!sub)
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
sub = ff_subtitles_queue_insert(&aqt->q, line, strlen(line), !new_event);
|
|
if (!sub)
|
|
return AVERROR(ENOMEM);
|
|
if (new_event) {
|
|
sub->pts = frame;
|
|
sub->duration = -1;
|
|
sub->pos = pos;
|
|
}
|
|
new_event = 0;
|
|
}
|
|
}
|
|
|
|
ff_subtitles_queue_finalize(&aqt->q);
|
|
return 0;
|
|
}
|
|
|
|
static int aqt_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
AQTitleContext *aqt = s->priv_data;
|
|
return ff_subtitles_queue_read_packet(&aqt->q, pkt);
|
|
}
|
|
|
|
static int aqt_read_seek(AVFormatContext *s, int stream_index,
|
|
int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
|
|
{
|
|
AQTitleContext *aqt = s->priv_data;
|
|
return ff_subtitles_queue_seek(&aqt->q, s, stream_index,
|
|
min_ts, ts, max_ts, flags);
|
|
}
|
|
|
|
static int aqt_read_close(AVFormatContext *s)
|
|
{
|
|
AQTitleContext *aqt = s->priv_data;
|
|
ff_subtitles_queue_clean(&aqt->q);
|
|
return 0;
|
|
}
|
|
|
|
#define OFFSET(x) offsetof(AQTitleContext, x)
|
|
#define SD AV_OPT_FLAG_SUBTITLE_PARAM|AV_OPT_FLAG_DECODING_PARAM
|
|
static const AVOption aqt_options[] = {
|
|
{ "subfps", "set the movie frame rate", OFFSET(frame_rate), AV_OPT_TYPE_RATIONAL, {.dbl=25}, 0, INT_MAX, SD },
|
|
{ NULL }
|
|
};
|
|
|
|
static const AVClass aqt_class = {
|
|
.class_name = "aqtdec",
|
|
.item_name = av_default_item_name,
|
|
.option = aqt_options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
|
|
AVInputFormat ff_aqtitle_demuxer = {
|
|
.name = "aqtitle",
|
|
.long_name = NULL_IF_CONFIG_SMALL("AQTitle subtitles"),
|
|
.priv_data_size = sizeof(AQTitleContext),
|
|
.read_probe = aqt_probe,
|
|
.read_header = aqt_read_header,
|
|
.read_packet = aqt_read_packet,
|
|
.read_seek2 = aqt_read_seek,
|
|
.read_close = aqt_read_close,
|
|
.extensions = "aqt",
|
|
.priv_class = &aqt_class,
|
|
};
|