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libavcodec
realtextdec.c
Go to the documentation of this file.
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/*
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* Copyright (c) 2012 Clément Bœsch
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* RealText subtitle decoder
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* @see http://service.real.com/help/library/guides/ProductionGuide/prodguide/htmfiles/realtext.htm
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*/
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#include "
avcodec.h
"
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#include "
ass.h
"
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#include "
libavutil/avstring.h
"
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#include "
libavutil/bprint.h
"
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static
int
rt_event_to_ass
(
AVBPrint
*
buf
,
const
char
*p)
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{
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int
prev_chr_is_space = 1;
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while
(*p) {
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if
(*p !=
'<'
) {
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if
(!
av_isspace
(*p))
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av_bprint_chars
(buf, *p, 1);
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else
if
(!prev_chr_is_space)
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av_bprint_chars
(buf,
' '
, 1);
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prev_chr_is_space =
av_isspace
(*p);
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}
else
{
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const
char
*
end
= strchr(p,
'>'
);
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if
(!end)
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break
;
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if
(!
av_strncasecmp
(p,
"<br/>"
, 5) ||
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!
av_strncasecmp
(p,
"<br>"
, 4)) {
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av_bprintf
(buf,
"\\N"
);
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}
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p =
end
;
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}
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p++;
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}
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av_bprintf
(buf,
"\r\n"
);
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return
0;
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}
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static
int
realtext_decode_frame
(
AVCodecContext
*avctx,
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void
*
data
,
int
*got_sub_ptr,
AVPacket
*avpkt)
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{
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AVSubtitle
*sub =
data
;
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const
char
*ptr = avpkt->
data
;
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AVBPrint
buf
;
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av_bprint_init
(&buf, 0, 4096);
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// note: no need to rescale pts & duration since they are in the same
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// timebase as ASS (1/100)
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if
(ptr && avpkt->
size
> 0 && !
rt_event_to_ass
(&buf, ptr))
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ff_ass_add_rect
(sub, buf.str, avpkt->
pts
, avpkt->
duration
, 0);
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*got_sub_ptr = sub->
num_rects
> 0;
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av_bprint_finalize
(&buf, NULL);
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return
avpkt->
size
;
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}
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AVCodec
ff_realtext_decoder
= {
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.
name
=
"realtext"
,
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.long_name =
NULL_IF_CONFIG_SMALL
(
"RealText subtitle"
),
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.type =
AVMEDIA_TYPE_SUBTITLE
,
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.id =
AV_CODEC_ID_REALTEXT
,
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.decode =
realtext_decode_frame
,
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.init =
ff_ass_subtitle_header_default
,
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};
Generated on Wed Jul 10 2013 23:48:04 for FFmpeg by
1.8.2