1 |
|
|
/* |
2 |
|
|
* Copyright (c) 2012 Clément Bœsch |
3 |
|
|
* |
4 |
|
|
* This file is part of FFmpeg. |
5 |
|
|
* |
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. |
10 |
|
|
* |
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. |
15 |
|
|
* |
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 |
19 |
|
|
*/ |
20 |
|
|
|
21 |
|
|
/** |
22 |
|
|
* @file |
23 |
|
|
* SubViewer subtitle decoder |
24 |
|
|
* @see https://en.wikipedia.org/wiki/SubViewer |
25 |
|
|
*/ |
26 |
|
|
|
27 |
|
|
#include "avcodec.h" |
28 |
|
|
#include "ass.h" |
29 |
|
|
#include "libavutil/bprint.h" |
30 |
|
|
|
31 |
|
3 |
static int subviewer_event_to_ass(AVBPrint *buf, const char *p) |
32 |
|
|
{ |
33 |
✓✓ |
56 |
while (*p) { |
34 |
✓✓ |
53 |
if (!strncmp(p, "[br]", 4)) { |
35 |
|
3 |
av_bprintf(buf, "\\N"); |
36 |
|
3 |
p += 4; |
37 |
|
|
} else { |
38 |
✓✓✓✗
|
50 |
if (p[0] == '\n' && p[1]) |
39 |
|
2 |
av_bprintf(buf, "\\N"); |
40 |
✓✗✓✗
|
48 |
else if (*p != '\n' && *p != '\r') |
41 |
|
48 |
av_bprint_chars(buf, *p, 1); |
42 |
|
50 |
p++; |
43 |
|
|
} |
44 |
|
|
} |
45 |
|
|
|
46 |
|
3 |
return 0; |
47 |
|
|
} |
48 |
|
|
|
49 |
|
3 |
static int subviewer_decode_frame(AVCodecContext *avctx, |
50 |
|
|
void *data, int *got_sub_ptr, AVPacket *avpkt) |
51 |
|
|
{ |
52 |
|
3 |
int ret = 0; |
53 |
|
3 |
AVSubtitle *sub = data; |
54 |
|
3 |
const char *ptr = avpkt->data; |
55 |
|
3 |
FFASSDecoderContext *s = avctx->priv_data; |
56 |
|
|
AVBPrint buf; |
57 |
|
|
|
58 |
|
3 |
av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED); |
59 |
✓✗✓✗
✓✗ |
3 |
if (ptr && avpkt->size > 0 && !subviewer_event_to_ass(&buf, ptr)) |
60 |
|
3 |
ret = ff_ass_add_rect(sub, buf.str, s->readorder++, 0, NULL, NULL); |
61 |
|
3 |
av_bprint_finalize(&buf, NULL); |
62 |
✗✓ |
3 |
if (ret < 0) |
63 |
|
|
return ret; |
64 |
|
3 |
*got_sub_ptr = sub->num_rects > 0; |
65 |
|
3 |
return avpkt->size; |
66 |
|
|
} |
67 |
|
|
|
68 |
|
|
AVCodec ff_subviewer_decoder = { |
69 |
|
|
.name = "subviewer", |
70 |
|
|
.long_name = NULL_IF_CONFIG_SMALL("SubViewer subtitle"), |
71 |
|
|
.type = AVMEDIA_TYPE_SUBTITLE, |
72 |
|
|
.id = AV_CODEC_ID_SUBVIEWER, |
73 |
|
|
.decode = subviewer_decode_frame, |
74 |
|
|
.init = ff_ass_subtitle_header_default, |
75 |
|
|
.flush = ff_ass_decoder_flush, |
76 |
|
|
.priv_data_size = sizeof(FFASSDecoderContext), |
77 |
|
|
}; |