FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/subviewerdec.c
Date: 2021-09-23 20:34:37
Exec Total Coverage
Lines: 23 24 95.8%
Branches: 13 20 65.0%

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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 * SubViewer subtitle decoder
24 * @see https://en.wikipedia.org/wiki/SubViewer
25 */
26
27 #include "avcodec.h"
28 #include "ass.h"
29 #include "internal.h"
30 #include "libavutil/bprint.h"
31
32 3 static int subviewer_event_to_ass(AVBPrint *buf, const char *p)
33 {
34
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56 while (*p) {
35
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53 if (!strncmp(p, "[br]", 4)) {
36 3 av_bprintf(buf, "\\N");
37 3 p += 4;
38 } else {
39
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50 if (p[0] == '\n' && p[1])
40 2 av_bprintf(buf, "\\N");
41
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48 else if (*p != '\n' && *p != '\r')
42 48 av_bprint_chars(buf, *p, 1);
43 50 p++;
44 }
45 }
46
47 3 return 0;
48 }
49
50 3 static int subviewer_decode_frame(AVCodecContext *avctx,
51 void *data, int *got_sub_ptr, AVPacket *avpkt)
52 {
53 3 int ret = 0;
54 3 AVSubtitle *sub = data;
55 3 const char *ptr = avpkt->data;
56 3 FFASSDecoderContext *s = avctx->priv_data;
57 AVBPrint buf;
58
59 3 av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
60
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3 if (ptr && avpkt->size > 0 && !subviewer_event_to_ass(&buf, ptr))
61 3 ret = ff_ass_add_rect(sub, buf.str, s->readorder++, 0, NULL, NULL);
62 3 av_bprint_finalize(&buf, NULL);
63
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3 if (ret < 0)
64 return ret;
65 3 *got_sub_ptr = sub->num_rects > 0;
66 3 return avpkt->size;
67 }
68
69 const AVCodec ff_subviewer_decoder = {
70 .name = "subviewer",
71 .long_name = NULL_IF_CONFIG_SMALL("SubViewer subtitle"),
72 .type = AVMEDIA_TYPE_SUBTITLE,
73 .id = AV_CODEC_ID_SUBVIEWER,
74 .decode = subviewer_decode_frame,
75 .init = ff_ass_subtitle_header_default,
76 .flush = ff_ass_decoder_flush,
77 .priv_data_size = sizeof(FFASSDecoderContext),
78 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
79 };
80