2 * Copyright (c) 2012 Clément Bœsch
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 * RealText subtitle decoder
24 * @see http://service.real.com/help/library/guides/ProductionGuide/prodguide/htmfiles/realtext.htm
29 #include "libavutil/avstring.h"
30 #include "libavutil/bprint.h"
32 static int rt_event_to_ass(AVBPrint
*buf
, const char *p
)
34 int prev_chr_is_space
= 1;
39 av_bprint_chars(buf
, *p
, 1);
40 else if (!prev_chr_is_space
)
41 av_bprint_chars(buf
, ' ', 1);
42 prev_chr_is_space
= av_isspace(*p
);
44 const char *end
= strchr(p
, '>');
47 if (!av_strncasecmp(p
, "<br/>", 5) ||
48 !av_strncasecmp(p
, "<br>", 4)) {
49 av_bprintf(buf
, "\\N");
58 static int realtext_decode_frame(AVCodecContext
*avctx
,
59 void *data
, int *got_sub_ptr
, AVPacket
*avpkt
)
62 AVSubtitle
*sub
= data
;
63 const char *ptr
= avpkt
->data
;
66 av_bprint_init(&buf
, 0, 4096);
67 // note: no need to rescale pts & duration since they are in the same
68 // timebase as ASS (1/100)
69 if (ptr
&& avpkt
->size
> 0 && !rt_event_to_ass(&buf
, ptr
))
70 ret
= ff_ass_add_rect_bprint(sub
, &buf
, avpkt
->pts
, avpkt
->duration
);
71 av_bprint_finalize(&buf
, NULL
);
74 *got_sub_ptr
= sub
->num_rects
> 0;
78 AVCodec ff_realtext_decoder
= {
80 .long_name
= NULL_IF_CONFIG_SMALL("RealText subtitle"),
81 .type
= AVMEDIA_TYPE_SUBTITLE
,
82 .id
= AV_CODEC_ID_REALTEXT
,
83 .decode
= realtext_decode_frame
,
84 .init
= ff_ass_subtitle_header_default
,