GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/realtextdec.c Lines: 29 31 93.5 %
Date: 2020-10-23 17:01:47 Branches: 16 22 72.7 %

Line Branch Exec Source
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
 * RealText subtitle decoder
24
 * @see http://service.real.com/help/library/guides/ProductionGuide/prodguide/htmfiles/realtext.htm
25
 */
26
27
#include "avcodec.h"
28
#include "ass.h"
29
#include "libavutil/avstring.h"
30
#include "libavutil/bprint.h"
31
32
5
static int rt_event_to_ass(AVBPrint *buf, const char *p)
33
{
34
5
    int prev_chr_is_space = 1;
35
36
121
    while (*p) {
37
116
        if (*p != '<') {
38
107
            if (!av_isspace(*p))
39
85
                av_bprint_chars(buf, *p, 1);
40
22
            else if (!prev_chr_is_space)
41
20
                av_bprint_chars(buf, ' ', 1);
42
107
            prev_chr_is_space = av_isspace(*p);
43
        } else {
44
9
            const char *end = strchr(p, '>');
45
9
            if (!end)
46
                break;
47

14
            if (!av_strncasecmp(p, "<br/>", 5) ||
48
5
                !av_strncasecmp(p, "<br>",  4)) {
49
4
                av_bprintf(buf, "\\N");
50
            }
51
9
            p = end;
52
        }
53
116
        p++;
54
    }
55
5
    return 0;
56
}
57
58
5
static int realtext_decode_frame(AVCodecContext *avctx,
59
                                 void *data, int *got_sub_ptr, AVPacket *avpkt)
60
{
61
5
    int ret = 0;
62
5
    AVSubtitle *sub = data;
63
5
    const char *ptr = avpkt->data;
64
5
    FFASSDecoderContext *s = avctx->priv_data;
65
    AVBPrint buf;
66
67
5
    av_bprint_init(&buf, 0, 4096);
68

5
    if (ptr && avpkt->size > 0 && !rt_event_to_ass(&buf, ptr))
69
5
        ret = ff_ass_add_rect(sub, buf.str, s->readorder++, 0, NULL, NULL);
70
5
    av_bprint_finalize(&buf, NULL);
71
5
    if (ret < 0)
72
        return ret;
73
5
    *got_sub_ptr = sub->num_rects > 0;
74
5
    return avpkt->size;
75
}
76
77
AVCodec ff_realtext_decoder = {
78
    .name           = "realtext",
79
    .long_name      = NULL_IF_CONFIG_SMALL("RealText subtitle"),
80
    .type           = AVMEDIA_TYPE_SUBTITLE,
81
    .id             = AV_CODEC_ID_REALTEXT,
82
    .decode         = realtext_decode_frame,
83
    .init           = ff_ass_subtitle_header_default,
84
    .flush          = ff_ass_decoder_flush,
85
    .priv_data_size = sizeof(FFASSDecoderContext),
86
};