FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/srtdec.c
Date: 2021-09-16 08:47:15
Exec Total Coverage
Lines: 28 33 84.8%
Branches: 15 26 57.7%

Line Branch Exec Source
1 /*
2 * SubRip subtitle decoder
3 * Copyright (c) 2010 Aurelien Jacobs <aurel@gnuage.org>
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "libavutil/avstring.h"
23 #include "libavutil/common.h"
24 #include "libavutil/intreadwrite.h"
25 #include "libavutil/parseutils.h"
26 #include "avcodec.h"
27 #include "ass.h"
28 #include "htmlsubtitles.h"
29 #include "internal.h"
30
31 232 static int srt_to_ass(AVCodecContext *avctx, AVBPrint *dst,
32 const char *in, int x1, int y1, int x2, int y2)
33 {
34
3/4
✓ Branch 0 taken 6 times.
✓ Branch 1 taken 226 times.
✓ Branch 2 taken 6 times.
✗ Branch 3 not taken.
232 if (x1 >= 0 && y1 >= 0) {
35 /* XXX: here we rescale coordinate assuming they are in DVD resolution
36 * (720x480) since we don't have anything better */
37
38
6/12
✓ Branch 0 taken 6 times.
✗ Branch 1 not taken.
✓ Branch 2 taken 6 times.
✗ Branch 3 not taken.
✓ Branch 4 taken 6 times.
✗ Branch 5 not taken.
✓ Branch 6 taken 6 times.
✗ Branch 7 not taken.
✓ Branch 8 taken 6 times.
✗ Branch 9 not taken.
✓ Branch 10 taken 6 times.
✗ Branch 11 not taken.
12 if (x2 >= 0 && y2 >= 0 && (x2 != x1 || y2 != y1) && x2 >= x1 && y2 >= y1) {
39 /* text rectangle defined, write the text at the center of the rectangle */
40 6 const int cx = x1 + (x2 - x1)/2;
41 6 const int cy = y1 + (y2 - y1)/2;
42 6 const int scaled_x = cx * (int64_t)ASS_DEFAULT_PLAYRESX / 720;
43 6 const int scaled_y = cy * (int64_t)ASS_DEFAULT_PLAYRESY / 480;
44 6 av_bprintf(dst, "{\\an5}{\\pos(%d,%d)}", scaled_x, scaled_y);
45 } else {
46 /* only the top left corner, assume the text starts in that corner */
47 const int scaled_x = x1 * (int64_t)ASS_DEFAULT_PLAYRESX / 720;
48 const int scaled_y = y1 * (int64_t)ASS_DEFAULT_PLAYRESY / 480;
49 av_bprintf(dst, "{\\an1}{\\pos(%d,%d)}", scaled_x, scaled_y);
50 }
51 }
52
53 232 return ff_htmlmarkup_to_ass(avctx, dst, in);
54 }
55
56 232 static int srt_decode_frame(AVCodecContext *avctx,
57 void *data, int *got_sub_ptr, AVPacket *avpkt)
58 {
59 232 AVSubtitle *sub = data;
60 AVBPrint buffer;
61 232 int x1 = -1, y1 = -1, x2 = -1, y2 = -1;
62 int ret;
63 size_t size;
64 232 const uint8_t *p = av_packet_get_side_data(avpkt, AV_PKT_DATA_SUBTITLE_POSITION, &size);
65 232 FFASSDecoderContext *s = avctx->priv_data;
66
67
3/4
✓ Branch 0 taken 6 times.
✓ Branch 1 taken 226 times.
✓ Branch 2 taken 6 times.
✗ Branch 3 not taken.
232 if (p && size == 16) {
68 6 x1 = AV_RL32(p );
69 6 y1 = AV_RL32(p + 4);
70 6 x2 = AV_RL32(p + 8);
71 6 y2 = AV_RL32(p + 12);
72 }
73
74
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 232 times.
232 if (avpkt->size <= 0)
75 return avpkt->size;
76
77 232 av_bprint_init(&buffer, 0, AV_BPRINT_SIZE_UNLIMITED);
78
79 232 ret = srt_to_ass(avctx, &buffer, avpkt->data, x1, y1, x2, y2);
80
1/2
✓ Branch 0 taken 232 times.
✗ Branch 1 not taken.
232 if (ret >= 0)
81 232 ret = ff_ass_add_rect(sub, buffer.str, s->readorder++, 0, NULL, NULL);
82 232 av_bprint_finalize(&buffer, NULL);
83
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 232 times.
232 if (ret < 0)
84 return ret;
85
86 232 *got_sub_ptr = sub->num_rects > 0;
87 232 return avpkt->size;
88 }
89
90 #if CONFIG_SRT_DECODER
91 /* deprecated decoder */
92 const AVCodec ff_srt_decoder = {
93 .name = "srt",
94 .long_name = NULL_IF_CONFIG_SMALL("SubRip subtitle"),
95 .type = AVMEDIA_TYPE_SUBTITLE,
96 .id = AV_CODEC_ID_SUBRIP,
97 .init = ff_ass_subtitle_header_default,
98 .decode = srt_decode_frame,
99 .flush = ff_ass_decoder_flush,
100 .priv_data_size = sizeof(FFASSDecoderContext),
101 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
102 };
103 #endif
104
105 #if CONFIG_SUBRIP_DECODER
106 const AVCodec ff_subrip_decoder = {
107 .name = "subrip",
108 .long_name = NULL_IF_CONFIG_SMALL("SubRip subtitle"),
109 .type = AVMEDIA_TYPE_SUBTITLE,
110 .id = AV_CODEC_ID_SUBRIP,
111 .init = ff_ass_subtitle_header_default,
112 .decode = srt_decode_frame,
113 .flush = ff_ass_decoder_flush,
114 .priv_data_size = sizeof(FFASSDecoderContext),
115 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
116 };
117 #endif
118