Directory: | ../../../ffmpeg/ |
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File: | src/libavcodec/textdec.c |
Date: | 2022-07-07 01:21:54 |
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Lines: | 16 | 21 | 76.2% |
Branches: | 4 | 10 | 40.0% |
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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/bprint.h" | ||
32 | #include "libavutil/opt.h" | ||
33 | |||
34 | typedef struct { | ||
35 | AVClass *class; | ||
36 | const char *linebreaks; | ||
37 | int keep_ass_markup; | ||
38 | int readorder; | ||
39 | } TextContext; | ||
40 | |||
41 | #define OFFSET(x) offsetof(TextContext, x) | ||
42 | #define SD AV_OPT_FLAG_SUBTITLE_PARAM | AV_OPT_FLAG_DECODING_PARAM | ||
43 | static const AVOption options[] = { | ||
44 | { "keep_ass_markup", "Set if ASS tags must be escaped", OFFSET(keep_ass_markup), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, .flags=SD }, | ||
45 | { NULL } | ||
46 | }; | ||
47 | |||
48 | 132 | static int text_decode_frame(AVCodecContext *avctx, AVSubtitle *sub, | |
49 | int *got_sub_ptr, const AVPacket *avpkt) | ||
50 | { | ||
51 | 132 | int ret = 0; | |
52 | AVBPrint buf; | ||
53 | 132 | const char *ptr = avpkt->data; | |
54 | 132 | TextContext *text = avctx->priv_data; | |
55 | |||
56 | 132 | av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED); | |
57 |
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132 | if (ptr && avpkt->size > 0 && *ptr) { |
58 | 132 | ff_ass_bprint_text_event(&buf, ptr, avpkt->size, text->linebreaks, text->keep_ass_markup); | |
59 | 132 | ret = ff_ass_add_rect(sub, buf.str, text->readorder++, 0, NULL, NULL); | |
60 | } | ||
61 | 132 | av_bprint_finalize(&buf, NULL); | |
62 |
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132 | if (ret < 0) |
63 | ✗ | return ret; | |
64 | 132 | *got_sub_ptr = sub->num_rects > 0; | |
65 | 132 | return avpkt->size; | |
66 | } | ||
67 | |||
68 | ✗ | static void text_flush(AVCodecContext *avctx) | |
69 | { | ||
70 | ✗ | TextContext *text = avctx->priv_data; | |
71 | ✗ | if (!(avctx->flags2 & AV_CODEC_FLAG2_RO_FLUSH_NOOP)) | |
72 | ✗ | text->readorder = 0; | |
73 | } | ||
74 | |||
75 | static const AVClass textsub_decoder_class = { | ||
76 | .class_name = "text/vplayer/stl/pjs/subviewer1 decoder", | ||
77 | .item_name = av_default_item_name, | ||
78 | .option = options, | ||
79 | .version = LIBAVUTIL_VERSION_INT, | ||
80 | }; | ||
81 | |||
82 | #if CONFIG_TEXT_DECODER | ||
83 | const FFCodec ff_text_decoder = { | ||
84 | .p.name = "text", | ||
85 | .p.long_name = NULL_IF_CONFIG_SMALL("Raw text subtitle"), | ||
86 | .priv_data_size = sizeof(TextContext), | ||
87 | .p.type = AVMEDIA_TYPE_SUBTITLE, | ||
88 | .p.id = AV_CODEC_ID_TEXT, | ||
89 | FF_CODEC_DECODE_SUB_CB(text_decode_frame), | ||
90 | .init = ff_ass_subtitle_header_default, | ||
91 | .p.priv_class = &textsub_decoder_class, | ||
92 | .flush = text_flush, | ||
93 | .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE, | ||
94 | }; | ||
95 | #endif | ||
96 | |||
97 | #if CONFIG_VPLAYER_DECODER || CONFIG_PJS_DECODER || CONFIG_SUBVIEWER1_DECODER || CONFIG_STL_DECODER | ||
98 | |||
99 | 8 | static 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 | .p.long_name = NULL_IF_CONFIG_SMALL("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 | .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE, | ||
118 | }; | ||
119 | #endif | ||
120 | |||
121 | #if CONFIG_STL_DECODER | ||
122 | const FFCodec ff_stl_decoder = { | ||
123 | .p.name = "stl", | ||
124 | .p.long_name = NULL_IF_CONFIG_SMALL("Spruce subtitle format"), | ||
125 | .priv_data_size = sizeof(TextContext), | ||
126 | .p.type = AVMEDIA_TYPE_SUBTITLE, | ||
127 | .p.id = AV_CODEC_ID_STL, | ||
128 | FF_CODEC_DECODE_SUB_CB(text_decode_frame), | ||
129 | .init = linebreak_init, | ||
130 | .p.priv_class = &textsub_decoder_class, | ||
131 | .flush = text_flush, | ||
132 | .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE, | ||
133 | }; | ||
134 | #endif | ||
135 | |||
136 | #if CONFIG_PJS_DECODER | ||
137 | const FFCodec ff_pjs_decoder = { | ||
138 | .p.name = "pjs", | ||
139 | .p.long_name = NULL_IF_CONFIG_SMALL("PJS subtitle"), | ||
140 | .priv_data_size = sizeof(TextContext), | ||
141 | .p.type = AVMEDIA_TYPE_SUBTITLE, | ||
142 | .p.id = AV_CODEC_ID_PJS, | ||
143 | FF_CODEC_DECODE_SUB_CB(text_decode_frame), | ||
144 | .init = linebreak_init, | ||
145 | .p.priv_class = &textsub_decoder_class, | ||
146 | .flush = text_flush, | ||
147 | .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE, | ||
148 | }; | ||
149 | #endif | ||
150 | |||
151 | #if CONFIG_SUBVIEWER1_DECODER | ||
152 | const FFCodec ff_subviewer1_decoder = { | ||
153 | .p.name = "subviewer1", | ||
154 | .p.long_name = NULL_IF_CONFIG_SMALL("SubViewer1 subtitle"), | ||
155 | .priv_data_size = sizeof(TextContext), | ||
156 | .p.type = AVMEDIA_TYPE_SUBTITLE, | ||
157 | .p.id = AV_CODEC_ID_SUBVIEWER1, | ||
158 | FF_CODEC_DECODE_SUB_CB(text_decode_frame), | ||
159 | .init = linebreak_init, | ||
160 | .p.priv_class = &textsub_decoder_class, | ||
161 | .flush = text_flush, | ||
162 | .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE, | ||
163 | }; | ||
164 | #endif | ||
165 | |||
166 | #endif /* text subtitles with '|' line break */ | ||
167 |