FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/boadec.c
Date: 2024-03-28 04:31:58
Exec Total Coverage
Lines: 7 36 19.4%
Functions: 1 3 33.3%
Branches: 6 26 23.1%

Line Branch Exec Source
1 /*
2 * Black ops audio demuxer
3 * Copyright (c) 2013 Michael Niedermayer
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/intreadwrite.h"
23 #include "libavcodec/internal.h"
24 #include "avformat.h"
25 #include "demux.h"
26 #include "internal.h"
27
28 7124 static int probe(const AVProbeData *p)
29 {
30
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7124 if (p->buf_size < 2096)
31 3936 return 0;
32
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3188 if ( AV_RL32(p->buf ) != 1
33
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8 || AV_RL32(p->buf + 8) > 100000
34
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8 || AV_RL32(p->buf + 12) > 8
35 || AV_RL32(p->buf + 16) != 2096
36 ||!AV_RL32(p->buf + 21)
37 || AV_RL16(p->buf + 25) != 2096
38 || AV_RL32(p->buf + 48) % AV_RL32(p->buf + 21)
39 )
40 3188 return 0;
41 return AVPROBE_SCORE_EXTENSION;
42 }
43
44
45 static int read_header(AVFormatContext *s)
46 {
47 AVStream *st = avformat_new_stream(s, NULL);
48 uint32_t data_offset;
49
50 if (!st)
51 return AVERROR(ENOMEM);
52
53 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
54 st->codecpar->codec_id = AV_CODEC_ID_ADPCM_MS;
55
56 avio_rl32(s->pb);
57 avio_rl32(s->pb);
58 st->codecpar->sample_rate = avio_rl32(s->pb);
59 st->codecpar->ch_layout.nb_channels = avio_rl32(s->pb);
60 if (st->codecpar->ch_layout.nb_channels > FF_SANE_NB_CHANNELS ||
61 st->codecpar->ch_layout.nb_channels <= 0)
62 return AVERROR(ENOSYS);
63 ffformatcontext(s)->data_offset = data_offset = avio_rl32(s->pb);
64 avio_r8(s->pb);
65 st->codecpar->block_align = avio_rl32(s->pb);
66 if (st->codecpar->block_align > INT_MAX / FF_SANE_NB_CHANNELS || st->codecpar->block_align <= 0)
67 return AVERROR_INVALIDDATA;
68 st->codecpar->block_align *= st->codecpar->ch_layout.nb_channels;
69
70 avio_seek(s->pb, data_offset, SEEK_SET);
71
72 return 0;
73 }
74
75 static int read_packet(AVFormatContext *s, AVPacket *pkt)
76 {
77 AVStream *st = s->streams[0];
78
79 return av_get_packet(s->pb, pkt, st->codecpar->block_align);
80 }
81
82 const FFInputFormat ff_boa_demuxer = {
83 .p.name = "boa",
84 .p.long_name = NULL_IF_CONFIG_SMALL("Black Ops Audio"),
85 .p.flags = AVFMT_GENERIC_INDEX,
86 .read_probe = probe,
87 .read_header = read_header,
88 .read_packet = read_packet,
89 };
90