mirror of
https://github.com/KolibriOS/kolibrios.git
synced 2024-12-17 12:22:35 +03:00
154 lines
5.0 KiB
C
154 lines
5.0 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
|
||
|
* RealText subtitle demuxer
|
||
|
* @see http://service.real.com/help/library/guides/ProductionGuide/prodguide/htmfiles/realtext.htm
|
||
|
*/
|
||
|
|
||
|
#include "avformat.h"
|
||
|
#include "internal.h"
|
||
|
#include "subtitles.h"
|
||
|
#include "libavutil/avstring.h"
|
||
|
#include "libavutil/bprint.h"
|
||
|
#include "libavutil/intreadwrite.h"
|
||
|
|
||
|
typedef struct {
|
||
|
FFDemuxSubtitlesQueue q;
|
||
|
} RealTextContext;
|
||
|
|
||
|
static int realtext_probe(AVProbeData *p)
|
||
|
{
|
||
|
const unsigned char *ptr = p->buf;
|
||
|
|
||
|
if (AV_RB24(ptr) == 0xEFBBBF)
|
||
|
ptr += 3; /* skip UTF-8 BOM */
|
||
|
return !av_strncasecmp(ptr, "<window", 7) ? AVPROBE_SCORE_EXTENSION : 0;
|
||
|
}
|
||
|
|
||
|
static int read_ts(const char *s)
|
||
|
{
|
||
|
int hh, mm, ss, ms;
|
||
|
|
||
|
if (sscanf(s, "%u:%u:%u.%u", &hh, &mm, &ss, &ms) == 4) return (hh*3600 + mm*60 + ss) * 100 + ms;
|
||
|
if (sscanf(s, "%u:%u:%u" , &hh, &mm, &ss ) == 3) return (hh*3600 + mm*60 + ss) * 100;
|
||
|
if (sscanf(s, "%u:%u.%u", &mm, &ss, &ms) == 3) return ( mm*60 + ss) * 100 + ms;
|
||
|
if (sscanf(s, "%u:%u" , &mm, &ss ) == 2) return ( mm*60 + ss) * 100;
|
||
|
if (sscanf(s, "%u.%u", &ss, &ms) == 2) return ( ss) * 100 + ms;
|
||
|
return strtol(s, NULL, 10) * 100;
|
||
|
}
|
||
|
|
||
|
static int realtext_read_header(AVFormatContext *s)
|
||
|
{
|
||
|
RealTextContext *rt = s->priv_data;
|
||
|
AVStream *st = avformat_new_stream(s, NULL);
|
||
|
AVBPrint buf;
|
||
|
char c = 0;
|
||
|
int res = 0, duration = read_ts("60"); // default duration is 60 seconds
|
||
|
|
||
|
if (!st)
|
||
|
return AVERROR(ENOMEM);
|
||
|
avpriv_set_pts_info(st, 64, 1, 100);
|
||
|
st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
|
||
|
st->codec->codec_id = AV_CODEC_ID_REALTEXT;
|
||
|
|
||
|
av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
|
||
|
|
||
|
while (!url_feof(s->pb)) {
|
||
|
AVPacket *sub;
|
||
|
const int64_t pos = avio_tell(s->pb) - (c != 0);
|
||
|
int n = ff_smil_extract_next_chunk(s->pb, &buf, &c);
|
||
|
|
||
|
if (n == 0)
|
||
|
break;
|
||
|
|
||
|
if (!av_strncasecmp(buf.str, "<window", 7)) {
|
||
|
/* save header to extradata */
|
||
|
const char *p = ff_smil_get_attr_ptr(buf.str, "duration");
|
||
|
|
||
|
if (p)
|
||
|
duration = read_ts(p);
|
||
|
st->codec->extradata = av_strdup(buf.str);
|
||
|
if (!st->codec->extradata) {
|
||
|
res = AVERROR(ENOMEM);
|
||
|
goto end;
|
||
|
}
|
||
|
st->codec->extradata_size = buf.len + 1;
|
||
|
} else {
|
||
|
/* if we just read a <time> tag, introduce a new event, otherwise merge
|
||
|
* with the previous one */
|
||
|
int merge = !av_strncasecmp(buf.str, "<time", 5) ? 0 : 1;
|
||
|
sub = ff_subtitles_queue_insert(&rt->q, buf.str, buf.len, merge);
|
||
|
if (!sub) {
|
||
|
res = AVERROR(ENOMEM);
|
||
|
goto end;
|
||
|
}
|
||
|
if (!merge) {
|
||
|
const char *begin = ff_smil_get_attr_ptr(buf.str, "begin");
|
||
|
const char *end = ff_smil_get_attr_ptr(buf.str, "end");
|
||
|
|
||
|
sub->pos = pos;
|
||
|
sub->pts = begin ? read_ts(begin) : 0;
|
||
|
sub->duration = end ? (read_ts(end) - sub->pts) : duration;
|
||
|
}
|
||
|
}
|
||
|
av_bprint_clear(&buf);
|
||
|
}
|
||
|
ff_subtitles_queue_finalize(&rt->q);
|
||
|
|
||
|
end:
|
||
|
av_bprint_finalize(&buf, NULL);
|
||
|
return res;
|
||
|
}
|
||
|
|
||
|
static int realtext_read_packet(AVFormatContext *s, AVPacket *pkt)
|
||
|
{
|
||
|
RealTextContext *rt = s->priv_data;
|
||
|
return ff_subtitles_queue_read_packet(&rt->q, pkt);
|
||
|
}
|
||
|
|
||
|
static int realtext_read_seek(AVFormatContext *s, int stream_index,
|
||
|
int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
|
||
|
{
|
||
|
RealTextContext *rt = s->priv_data;
|
||
|
return ff_subtitles_queue_seek(&rt->q, s, stream_index,
|
||
|
min_ts, ts, max_ts, flags);
|
||
|
}
|
||
|
|
||
|
static int realtext_read_close(AVFormatContext *s)
|
||
|
{
|
||
|
RealTextContext *rt = s->priv_data;
|
||
|
ff_subtitles_queue_clean(&rt->q);
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
AVInputFormat ff_realtext_demuxer = {
|
||
|
.name = "realtext",
|
||
|
.long_name = NULL_IF_CONFIG_SMALL("RealText subtitle format"),
|
||
|
.priv_data_size = sizeof(RealTextContext),
|
||
|
.read_probe = realtext_probe,
|
||
|
.read_header = realtext_read_header,
|
||
|
.read_packet = realtext_read_packet,
|
||
|
.read_seek2 = realtext_read_seek,
|
||
|
.read_close = realtext_read_close,
|
||
|
.extensions = "rt",
|
||
|
};
|