FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/samidec.c
Date: 2025-11-29 09:16:16
Exec Total Coverage
Lines: 45 56 80.4%
Functions: 2 2 100.0%
Branches: 19 28 67.9%
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 * SAMI subtitle demuxer
24 * @see http://msdn.microsoft.com/en-us/library/ms971327.aspx
25 */
26
27 #include "avformat.h"
28 #include "demux.h"
29 #include "internal.h"
30 #include "subtitles.h"
31 #include "libavutil/avstring.h"
32 #include "libavutil/bprint.h"
33
34 typedef struct {
35 FFDemuxSubtitlesQueue q;
36 } SAMIContext;
37
38 7293 static int sami_probe(const AVProbeData *p)
39 {
40 char buf[6];
41 FFTextReader tr;
42 7293 ff_text_init_buf(&tr, p->buf, p->buf_size);
43 7293 ff_text_read(&tr, buf, sizeof(buf));
44
45
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 7293 return !strncmp(buf, "<SAMI>", 6) ? AVPROBE_SCORE_MAX : 0;
46 }
47
48 2 static int sami_read_header(AVFormatContext *s)
49 {
50 2 SAMIContext *sami = s->priv_data;
51 2 AVStream *st = avformat_new_stream(s, NULL);
52 AVBPrint buf, hdr_buf;
53 2 char c = 0;
54 2 int res = 0, got_first_sync_point = 0;
55 FFTextReader tr;
56 2 ff_text_init_avio(s, &tr, s->pb);
57
58
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 2 if (!st)
59 ✗ return AVERROR(ENOMEM);
60 2 avpriv_set_pts_info(st, 64, 1, 1000);
61 2 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
62 2 st->codecpar->codec_id = AV_CODEC_ID_SAMI;
63
64 2 av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
65 2 av_bprint_init(&hdr_buf, 0, AV_BPRINT_SIZE_UNLIMITED);
66
67
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 1095 while (!ff_text_eof(&tr)) {
68 AVPacket *sub;
69 1095 const int64_t pos = ff_text_pos(&tr) - (c != 0);
70 1095 int is_sync, is_body, n = ff_smil_extract_next_text_chunk(&tr, &buf, &c);
71
72
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 1095 if (n < 0) {
73 ✗ res = n;
74 ✗ goto end;
75 }
76
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 1095 if (n == 0)
77 ✗ break;
78
79 1095 is_body = !av_strncasecmp(buf.str, "</BODY", 6);
80
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 1095 if (is_body) {
81 2 av_bprint_clear(&buf);
82 2 break;
83 }
84
85 1093 is_sync = !av_strncasecmp(buf.str, "<SYNC", 5);
86
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 1093 if (is_sync)
87 167 got_first_sync_point = 1;
88
89
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 1093 if (!got_first_sync_point) {
90 39 av_bprintf(&hdr_buf, "%s", buf.str);
91 } else {
92 1054 sub = ff_subtitles_queue_insert_bprint(&sami->q, &buf, !is_sync);
93
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 1054 if (!sub) {
94 ✗ res = AVERROR(ENOMEM);
95 ✗ av_bprint_finalize(&hdr_buf, NULL);
96 ✗ goto end;
97 }
98
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 1054 if (is_sync) {
99 167 const char *p = ff_smil_get_attr_ptr(buf.str, "Start");
100 167 sub->pos = pos;
101
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 167 sub->pts = p ? strtol(p, NULL, 10) : 0;
102
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 167 if (sub->pts <= INT64_MIN/2 || sub->pts >= INT64_MAX/2) {
103 ✗ res = AVERROR_PATCHWELCOME;
104 ✗ av_bprint_finalize(&hdr_buf, NULL);
105 ✗ goto end;
106 }
107
108 167 sub->duration = -1;
109 }
110 }
111 1093 av_bprint_clear(&buf);
112 }
113
114 2 res = ff_bprint_to_codecpar_extradata(st->codecpar, &hdr_buf);
115
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 2 if (res < 0)
116 ✗ goto end;
117
118 2 ff_subtitles_queue_finalize(s, &sami->q);
119
120 2 end:
121 2 av_bprint_finalize(&buf, NULL);
122 2 return res;
123 }
124
125 const FFInputFormat ff_sami_demuxer = {
126 .p.name = "sami",
127 .p.long_name = NULL_IF_CONFIG_SMALL("SAMI subtitle format"),
128 .p.extensions = "smi,sami",
129 .priv_data_size = sizeof(SAMIContext),
130 .flags_internal = FF_INFMT_FLAG_INIT_CLEANUP,
131 .read_probe = sami_probe,
132 .read_header = sami_read_header,
133 .read_packet = ff_subtitles_read_packet,
134 .read_seek2 = ff_subtitles_read_seek,
135 .read_close = ff_subtitles_read_close,
136 };
137