FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/textdec.c
Date: 2025-11-29 09:16:16
Exec Total Coverage
Lines: 16 22 72.7%
Functions: 2 3 66.7%
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/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