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2ba45a60 DM |
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 | ||
2ba45a60 DM |
62 | return 0; |
63 | } | |
64 | ||
65 | static int mpl2_decode_frame(AVCodecContext *avctx, void *data, | |
66 | int *got_sub_ptr, AVPacket *avpkt) | |
67 | { | |
f6fa7814 | 68 | int ret = 0; |
2ba45a60 DM |
69 | AVBPrint buf; |
70 | AVSubtitle *sub = data; | |
71 | const char *ptr = avpkt->data; | |
72 | const int ts_start = av_rescale_q(avpkt->pts, avctx->time_base, (AVRational){1,100}); | |
73 | const int ts_duration = avpkt->duration != -1 ? | |
74 | av_rescale_q(avpkt->duration, avctx->time_base, (AVRational){1,100}) : -1; | |
75 | ||
76 | av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED); | |
f6fa7814 DM |
77 | if (ptr && avpkt->size > 0 && *ptr && !mpl2_event_to_ass(&buf, ptr)) |
78 | ret = ff_ass_add_rect_bprint(sub, &buf, ts_start, ts_duration); | |
2ba45a60 | 79 | av_bprint_finalize(&buf, NULL); |
f6fa7814 DM |
80 | if (ret < 0) |
81 | return ret; | |
82 | *got_sub_ptr = sub->num_rects > 0; | |
2ba45a60 DM |
83 | return avpkt->size; |
84 | } | |
85 | ||
86 | AVCodec ff_mpl2_decoder = { | |
87 | .name = "mpl2", | |
88 | .long_name = NULL_IF_CONFIG_SMALL("MPL2 subtitle"), | |
89 | .type = AVMEDIA_TYPE_SUBTITLE, | |
90 | .id = AV_CODEC_ID_MPL2, | |
91 | .decode = mpl2_decode_frame, | |
92 | .init = ff_ass_subtitle_header_default, | |
93 | }; |