2 * Copyright (c) 2012 Clément Bœsch
4 * This file is part of FFmpeg.
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.
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.
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
23 * Raw subtitles decoder
28 #include "libavutil/bprint.h"
29 #include "libavutil/opt.h"
33 const char *linebreaks
;
37 #define OFFSET(x) offsetof(TextContext, x)
38 #define SD AV_OPT_FLAG_SUBTITLE_PARAM | AV_OPT_FLAG_DECODING_PARAM
39 static const AVOption options
[] = {
40 { "keep_ass_markup", "Set if ASS tags must be escaped", OFFSET(keep_ass_markup
), AV_OPT_TYPE_INT
, {.i64
=0}, 0, 1, .flags
=SD
},
44 static int text_decode_frame(AVCodecContext
*avctx
, void *data
,
45 int *got_sub_ptr
, AVPacket
*avpkt
)
48 AVSubtitle
*sub
= data
;
49 const char *ptr
= avpkt
->data
;
50 const TextContext
*text
= avctx
->priv_data
;
51 const int ts_start
= av_rescale_q(avpkt
->pts
, avctx
->time_base
, (AVRational
){1,100});
52 const int ts_duration
= avpkt
->duration
!= -1 ?
53 av_rescale_q(avpkt
->duration
, avctx
->time_base
, (AVRational
){1,100}) : -1;
55 av_bprint_init(&buf
, 0, AV_BPRINT_SIZE_UNLIMITED
);
56 if (ptr
&& avpkt
->size
> 0 && *ptr
) {
57 ff_ass_bprint_text_event(&buf
, ptr
, avpkt
->size
, text
->linebreaks
, text
->keep_ass_markup
);
58 if (!av_bprint_is_complete(&buf
)) {
59 av_bprint_finalize(&buf
, NULL
);
60 return AVERROR(ENOMEM
);
62 ff_ass_add_rect(sub
, buf
.str
, ts_start
, ts_duration
, 0);
64 *got_sub_ptr
= sub
->num_rects
> 0;
65 av_bprint_finalize(&buf
, NULL
);
69 #define DECLARE_CLASS(decname) static const AVClass decname ## _decoder_class = { \
70 .class_name = #decname " decoder", \
71 .item_name = av_default_item_name, \
72 .option = decname ## _options, \
73 .version = LIBAVUTIL_VERSION_INT, \
76 #if CONFIG_TEXT_DECODER
77 #define text_options options
80 AVCodec ff_text_decoder
= {
82 .long_name
= NULL_IF_CONFIG_SMALL("Raw text subtitle"),
83 .priv_data_size
= sizeof(TextContext
),
84 .type
= AVMEDIA_TYPE_SUBTITLE
,
85 .id
= AV_CODEC_ID_TEXT
,
86 .decode
= text_decode_frame
,
87 .init
= ff_ass_subtitle_header_default
,
88 .priv_class
= &text_decoder_class
,
92 #if CONFIG_VPLAYER_DECODER || CONFIG_PJS_DECODER || CONFIG_SUBVIEWER1_DECODER
94 static int linebreak_init(AVCodecContext
*avctx
)
96 TextContext
*text
= avctx
->priv_data
;
97 text
->linebreaks
= "|";
98 return ff_ass_subtitle_header_default(avctx
);
101 #if CONFIG_VPLAYER_DECODER
102 #define vplayer_options options
103 DECLARE_CLASS(vplayer
);
105 AVCodec ff_vplayer_decoder
= {
107 .long_name
= NULL_IF_CONFIG_SMALL("VPlayer subtitle"),
108 .priv_data_size
= sizeof(TextContext
),
109 .type
= AVMEDIA_TYPE_SUBTITLE
,
110 .id
= AV_CODEC_ID_VPLAYER
,
111 .decode
= text_decode_frame
,
112 .init
= linebreak_init
,
113 .priv_class
= &vplayer_decoder_class
,
117 #if CONFIG_PJS_DECODER
118 #define pjs_options options
121 AVCodec ff_pjs_decoder
= {
123 .long_name
= NULL_IF_CONFIG_SMALL("PJS subtitle"),
124 .priv_data_size
= sizeof(TextContext
),
125 .type
= AVMEDIA_TYPE_SUBTITLE
,
126 .id
= AV_CODEC_ID_PJS
,
127 .decode
= text_decode_frame
,
128 .init
= linebreak_init
,
129 .priv_class
= &pjs_decoder_class
,
133 #if CONFIG_SUBVIEWER1_DECODER
134 #define subviewer1_options options
135 DECLARE_CLASS(subviewer1
);
137 AVCodec ff_subviewer1_decoder
= {
138 .name
= "subviewer1",
139 .long_name
= NULL_IF_CONFIG_SMALL("SubViewer1 subtitle"),
140 .priv_data_size
= sizeof(TextContext
),
141 .type
= AVMEDIA_TYPE_SUBTITLE
,
142 .id
= AV_CODEC_ID_SUBVIEWER1
,
143 .decode
= text_decode_frame
,
144 .init
= linebreak_init
,
145 .priv_class
= &subviewer1_decoder_class
,
149 #endif /* text subtitles with '|' line break */