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 * SubViewer subtitle decoder
24 * @see https://en.wikipedia.org/wiki/SubViewer
29 #include "libavutil/bprint.h"
31 static int subviewer_event_to_ass(AVBPrint
*buf
, const char *p
)
34 if (!strncmp(p
, "[br]", 4)) {
35 av_bprintf(buf
, "\\N");
38 if (p
[0] == '\n' && p
[1])
39 av_bprintf(buf
, "\\N");
40 else if (*p
!= '\n' && *p
!= '\r')
41 av_bprint_chars(buf
, *p
, 1);
49 static int subviewer_decode_frame(AVCodecContext
*avctx
,
50 void *data
, int *got_sub_ptr
, AVPacket
*avpkt
)
53 AVSubtitle
*sub
= data
;
54 const char *ptr
= avpkt
->data
;
57 av_bprint_init(&buf
, 0, AV_BPRINT_SIZE_UNLIMITED
);
58 // note: no need to rescale pts & duration since they are in the same
59 // timebase as ASS (1/100)
60 if (ptr
&& avpkt
->size
> 0 && !subviewer_event_to_ass(&buf
, ptr
))
61 ret
= ff_ass_add_rect_bprint(sub
, &buf
, avpkt
->pts
, avpkt
->duration
);
62 av_bprint_finalize(&buf
, NULL
);
65 *got_sub_ptr
= sub
->num_rects
> 0;
69 AVCodec ff_subviewer_decoder
= {
71 .long_name
= NULL_IF_CONFIG_SMALL("SubViewer subtitle"),
72 .type
= AVMEDIA_TYPE_SUBTITLE
,
73 .id
= AV_CODEC_ID_SUBVIEWER
,
74 .decode
= subviewer_decode_frame
,
75 .init
= ff_ass_subtitle_header_default
,