/src/ffmpeg/libavcodec/subviewerdec.c
Line | Count | Source (jump to first uncovered line) |
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 "codec_internal.h" |
30 | | #include "libavutil/bprint.h" |
31 | | |
32 | | static int subviewer_event_to_ass(AVBPrint *buf, const char *p) |
33 | 163k | { |
34 | 15.6M | while (*p) { |
35 | 15.4M | if (!strncmp(p, "[br]", 4)) { |
36 | 385 | av_bprintf(buf, "\\N"); |
37 | 385 | p += 4; |
38 | 15.4M | } else { |
39 | 15.4M | if (p[0] == '\n' && p[1]) |
40 | 15.2M | av_bprintf(buf, "\\N"); |
41 | 265k | else if (*p != '\n' && *p != '\r') |
42 | 151k | av_bprint_chars(buf, *p, 1); |
43 | 15.4M | p++; |
44 | 15.4M | } |
45 | 15.4M | } |
46 | | |
47 | 163k | return 0; |
48 | 163k | } |
49 | | |
50 | | static int subviewer_decode_frame(AVCodecContext *avctx, AVSubtitle *sub, |
51 | | int *got_sub_ptr, const AVPacket *avpkt) |
52 | 163k | { |
53 | 163k | int ret = 0; |
54 | 163k | const char *ptr = avpkt->data; |
55 | 163k | FFASSDecoderContext *s = avctx->priv_data; |
56 | 163k | AVBPrint buf; |
57 | | |
58 | 163k | av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED); |
59 | 163k | if (ptr && avpkt->size > 0 && !subviewer_event_to_ass(&buf, ptr)) |
60 | 163k | ret = ff_ass_add_rect(sub, buf.str, s->readorder++, 0, NULL, NULL); |
61 | 163k | av_bprint_finalize(&buf, NULL); |
62 | 163k | if (ret < 0) |
63 | 0 | return ret; |
64 | 163k | *got_sub_ptr = sub->num_rects > 0; |
65 | 163k | return avpkt->size; |
66 | 163k | } |
67 | | |
68 | | const FFCodec ff_subviewer_decoder = { |
69 | | .p.name = "subviewer", |
70 | | CODEC_LONG_NAME("SubViewer subtitle"), |
71 | | .p.type = AVMEDIA_TYPE_SUBTITLE, |
72 | | .p.id = AV_CODEC_ID_SUBVIEWER, |
73 | | FF_CODEC_DECODE_SUB_CB(subviewer_decode_frame), |
74 | | .init = ff_ass_subtitle_header_default, |
75 | | .flush = ff_ass_decoder_flush, |
76 | | .priv_data_size = sizeof(FFASSDecoderContext), |
77 | | }; |