blob: 409e4b3708a19f9dd59b4f9a2a2aa16f365442a4
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 | * MPL2 subtitles decoder |
24 | * |
25 | * @see http://web.archive.org/web/20090328040233/http://napisy.ussbrowarek.org/mpl2-eng.html |
26 | */ |
27 | |
28 | #include "avcodec.h" |
29 | #include "ass.h" |
30 | #include "libavutil/bprint.h" |
31 | |
32 | static int mpl2_event_to_ass(AVBPrint *buf, const char *p) |
33 | { |
34 | if (*p == ' ') |
35 | p++; |
36 | |
37 | while (*p) { |
38 | int got_style = 0; |
39 | |
40 | while (*p && strchr("/\\_", *p)) { |
41 | if (*p == '/') av_bprintf(buf, "{\\i1}"); |
42 | else if (*p == '\\') av_bprintf(buf, "{\\b1}"); |
43 | else if (*p == '_') av_bprintf(buf, "{\\u1}"); |
44 | got_style = 1; |
45 | p++; |
46 | } |
47 | |
48 | while (*p && *p != '|') { |
49 | if (*p != '\r' && *p != '\n') |
50 | av_bprint_chars(buf, *p, 1); |
51 | p++; |
52 | } |
53 | |
54 | if (*p == '|') { |
55 | if (got_style) |
56 | av_bprintf(buf, "{\\r}"); |
57 | av_bprintf(buf, "\\N"); |
58 | p++; |
59 | } |
60 | } |
61 | |
62 | return 0; |
63 | } |
64 | |
65 | static int mpl2_decode_frame(AVCodecContext *avctx, void *data, |
66 | int *got_sub_ptr, AVPacket *avpkt) |
67 | { |
68 | int ret = 0; |
69 | AVBPrint buf; |
70 | AVSubtitle *sub = data; |
71 | const char *ptr = avpkt->data; |
72 | FFASSDecoderContext *s = avctx->priv_data; |
73 | |
74 | av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED); |
75 | if (ptr && avpkt->size > 0 && *ptr && !mpl2_event_to_ass(&buf, ptr)) |
76 | ret = ff_ass_add_rect(sub, buf.str, s->readorder++, 0, NULL, NULL); |
77 | av_bprint_finalize(&buf, NULL); |
78 | if (ret < 0) |
79 | return ret; |
80 | *got_sub_ptr = sub->num_rects > 0; |
81 | return avpkt->size; |
82 | } |
83 | |
84 | AVCodec ff_mpl2_decoder = { |
85 | .name = "mpl2", |
86 | .long_name = NULL_IF_CONFIG_SMALL("MPL2 subtitle"), |
87 | .type = AVMEDIA_TYPE_SUBTITLE, |
88 | .id = AV_CODEC_ID_MPL2, |
89 | .decode = mpl2_decode_frame, |
90 | .init = ff_ass_subtitle_header_default, |
91 | .flush = ff_ass_decoder_flush, |
92 | .priv_data_size = sizeof(FFASSDecoderContext), |
93 | }; |
94 |