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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 | * Raw subtitles decoder | ||
24 | */ | ||
25 | |||
26 | #include "config_components.h" | ||
27 | |||
28 | #include "avcodec.h" | ||
29 | #include "ass.h" | ||
30 | #include "codec_internal.h" | ||
31 | #include "libavutil/attributes.h" | ||
32 | #include "libavutil/bprint.h" | ||
33 | #include "libavutil/opt.h" | ||
34 | |||
35 | typedef struct { | ||
36 | AVClass *class; | ||
37 | const char *linebreaks; | ||
38 | int keep_ass_markup; | ||
39 | int readorder; | ||
40 | } TextContext; | ||
41 | |||
42 | #define OFFSET(x) offsetof(TextContext, x) | ||
43 | #define SD AV_OPT_FLAG_SUBTITLE_PARAM | AV_OPT_FLAG_DECODING_PARAM | ||
44 | static const AVOption options[] = { | ||
45 | { "keep_ass_markup", "Set if ASS tags must be escaped", OFFSET(keep_ass_markup), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, .flags=SD }, | ||
46 | { NULL } | ||
47 | }; | ||
48 | |||
49 | 218 | static int text_decode_frame(AVCodecContext *avctx, AVSubtitle *sub, | |
50 | int *got_sub_ptr, const AVPacket *avpkt) | ||
51 | { | ||
52 | 218 | int ret = 0; | |
53 | AVBPrint buf; | ||
54 | 218 | const char *ptr = avpkt->data; | |
55 | 218 | TextContext *text = avctx->priv_data; | |
56 | |||
57 | 218 | av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED); | |
58 |
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218 | if (ptr && avpkt->size > 0 && *ptr) { |
59 | 218 | ff_ass_bprint_text_event(&buf, ptr, avpkt->size, text->linebreaks, text->keep_ass_markup); | |
60 | 218 | ret = ff_ass_add_rect(sub, buf.str, text->readorder++, 0, NULL, NULL); | |
61 | } | ||
62 | 218 | av_bprint_finalize(&buf, NULL); | |
63 |
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218 | if (ret < 0) |
64 | ✗ | return ret; | |
65 | 218 | *got_sub_ptr = sub->num_rects > 0; | |
66 | 218 | return avpkt->size; | |
67 | } | ||
68 | |||
69 | ✗ | static av_cold void text_flush(AVCodecContext *avctx) | |
70 | { | ||
71 | ✗ | TextContext *text = avctx->priv_data; | |
72 | ✗ | if (!(avctx->flags2 & AV_CODEC_FLAG2_RO_FLUSH_NOOP)) | |
73 | ✗ | text->readorder = 0; | |
74 | ✗ | } | |
75 | |||
76 | static const AVClass textsub_decoder_class = { | ||
77 | .class_name = "text/vplayer/stl/pjs/subviewer1 decoder", | ||
78 | .item_name = av_default_item_name, | ||
79 | .option = options, | ||
80 | .version = LIBAVUTIL_VERSION_INT, | ||
81 | }; | ||
82 | |||
83 | #if CONFIG_TEXT_DECODER | ||
84 | const FFCodec ff_text_decoder = { | ||
85 | .p.name = "text", | ||
86 | CODEC_LONG_NAME("Raw text subtitle"), | ||
87 | .priv_data_size = sizeof(TextContext), | ||
88 | .p.type = AVMEDIA_TYPE_SUBTITLE, | ||
89 | .p.id = AV_CODEC_ID_TEXT, | ||
90 | FF_CODEC_DECODE_SUB_CB(text_decode_frame), | ||
91 | .init = ff_ass_subtitle_header_default, | ||
92 | .p.priv_class = &textsub_decoder_class, | ||
93 | .flush = text_flush, | ||
94 | }; | ||
95 | #endif | ||
96 | |||
97 | #if CONFIG_VPLAYER_DECODER || CONFIG_PJS_DECODER || CONFIG_SUBVIEWER1_DECODER || CONFIG_STL_DECODER | ||
98 | |||
99 | 8 | static av_cold int linebreak_init(AVCodecContext *avctx) | |
100 | { | ||
101 | 8 | TextContext *text = avctx->priv_data; | |
102 | 8 | text->linebreaks = "|"; | |
103 | 8 | return ff_ass_subtitle_header_default(avctx); | |
104 | } | ||
105 | |||
106 | #if CONFIG_VPLAYER_DECODER | ||
107 | const FFCodec ff_vplayer_decoder = { | ||
108 | .p.name = "vplayer", | ||
109 | CODEC_LONG_NAME("VPlayer subtitle"), | ||
110 | .priv_data_size = sizeof(TextContext), | ||
111 | .p.type = AVMEDIA_TYPE_SUBTITLE, | ||
112 | .p.id = AV_CODEC_ID_VPLAYER, | ||
113 | FF_CODEC_DECODE_SUB_CB(text_decode_frame), | ||
114 | .init = linebreak_init, | ||
115 | .p.priv_class = &textsub_decoder_class, | ||
116 | .flush = text_flush, | ||
117 | }; | ||
118 | #endif | ||
119 | |||
120 | #if CONFIG_STL_DECODER | ||
121 | const FFCodec ff_stl_decoder = { | ||
122 | .p.name = "stl", | ||
123 | CODEC_LONG_NAME("Spruce subtitle format"), | ||
124 | .priv_data_size = sizeof(TextContext), | ||
125 | .p.type = AVMEDIA_TYPE_SUBTITLE, | ||
126 | .p.id = AV_CODEC_ID_STL, | ||
127 | FF_CODEC_DECODE_SUB_CB(text_decode_frame), | ||
128 | .init = linebreak_init, | ||
129 | .p.priv_class = &textsub_decoder_class, | ||
130 | .flush = text_flush, | ||
131 | }; | ||
132 | #endif | ||
133 | |||
134 | #if CONFIG_PJS_DECODER | ||
135 | const FFCodec ff_pjs_decoder = { | ||
136 | .p.name = "pjs", | ||
137 | CODEC_LONG_NAME("PJS subtitle"), | ||
138 | .priv_data_size = sizeof(TextContext), | ||
139 | .p.type = AVMEDIA_TYPE_SUBTITLE, | ||
140 | .p.id = AV_CODEC_ID_PJS, | ||
141 | FF_CODEC_DECODE_SUB_CB(text_decode_frame), | ||
142 | .init = linebreak_init, | ||
143 | .p.priv_class = &textsub_decoder_class, | ||
144 | .flush = text_flush, | ||
145 | }; | ||
146 | #endif | ||
147 | |||
148 | #if CONFIG_SUBVIEWER1_DECODER | ||
149 | const FFCodec ff_subviewer1_decoder = { | ||
150 | .p.name = "subviewer1", | ||
151 | CODEC_LONG_NAME("SubViewer1 subtitle"), | ||
152 | .priv_data_size = sizeof(TextContext), | ||
153 | .p.type = AVMEDIA_TYPE_SUBTITLE, | ||
154 | .p.id = AV_CODEC_ID_SUBVIEWER1, | ||
155 | FF_CODEC_DECODE_SUB_CB(text_decode_frame), | ||
156 | .init = linebreak_init, | ||
157 | .p.priv_class = &textsub_decoder_class, | ||
158 | .flush = text_flush, | ||
159 | }; | ||
160 | #endif | ||
161 | |||
162 | #endif /* text subtitles with '|' line break */ | ||
163 |