1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
/*
* Copyright 2003-2021 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "FlacStreamMetadata.hxx"
#include "FlacAudioFormat.hxx"
#include "ScanVorbisComment.hxx"
#include "pcm/CheckAudioFormat.hxx"
#include "MixRampInfo.hxx"
#include "tag/Handler.hxx"
#include "tag/Builder.hxx"
#include "tag/Tag.hxx"
#include "tag/ReplayGain.hxx"
#include "tag/MixRamp.hxx"
#include "ReplayGainInfo.hxx"
#include "util/StringView.hxx"
#include <cassert>
static StringView
ToStringView(const FLAC__StreamMetadata_VorbisComment_Entry &entry) noexcept
{
return {(const char *)entry.entry, entry.length};
}
bool
flac_parse_replay_gain(ReplayGainInfo &rgi,
const FLAC__StreamMetadata_VorbisComment &vc)
{
rgi.Clear();
bool found = false;
const auto *comments = vc.comments;
for (FLAC__uint32 i = 0, n = vc.num_comments; i < n; ++i)
if (ParseReplayGainVorbis(rgi, ToStringView(comments[i])))
found = true;
return found;
}
MixRampInfo
flac_parse_mixramp(const FLAC__StreamMetadata_VorbisComment &vc)
{
MixRampInfo mix_ramp;
const auto *comments = vc.comments;
for (FLAC__uint32 i = 0, n = vc.num_comments; i < n; ++i)
ParseMixRampVorbis(mix_ramp, ToStringView(comments[i]));
return mix_ramp;
}
static void
flac_scan_comments(const FLAC__StreamMetadata_VorbisComment *comment,
TagHandler &handler) noexcept
{
for (unsigned i = 0; i < comment->num_comments; ++i)
ScanVorbisComment(ToStringView(comment->comments[i]), handler);
}
gcc_pure
static inline SongTime
flac_duration(const FLAC__StreamMetadata_StreamInfo *stream_info) noexcept
{
assert(stream_info->sample_rate > 0);
return SongTime::FromScale<uint64_t>(stream_info->total_samples,
stream_info->sample_rate);
}
static void
Scan(const FLAC__StreamMetadata_StreamInfo &stream_info,
TagHandler &handler) noexcept
{
if (stream_info.sample_rate > 0)
handler.OnDuration(flac_duration(&stream_info));
try {
handler.OnAudioFormat(CheckAudioFormat(stream_info.sample_rate,
FlacSampleFormat(stream_info.bits_per_sample),
stream_info.channels));
} catch (...) {
}
}
static void
Scan(const FLAC__StreamMetadata_Picture &picture, TagHandler &handler) noexcept
{
if (!handler.WantPicture())
return;
if (picture.mime_type != nullptr &&
StringIsEqual(picture.mime_type, "-->"))
/* this is a URL, not image data */
return;
handler.OnPicture(picture.mime_type,
{picture.data, picture.data_length});
}
void
flac_scan_metadata(const FLAC__StreamMetadata *block,
TagHandler &handler) noexcept
{
switch (block->type) {
case FLAC__METADATA_TYPE_VORBIS_COMMENT:
flac_scan_comments(&block->data.vorbis_comment,
handler);
break;
case FLAC__METADATA_TYPE_STREAMINFO:
Scan(block->data.stream_info, handler);
break;
case FLAC__METADATA_TYPE_PICTURE:
Scan(block->data.picture, handler);
break;
default:
break;
}
}
Tag
flac_vorbis_comments_to_tag(const FLAC__StreamMetadata_VorbisComment *comment)
{
TagBuilder tag_builder;
AddTagHandler h(tag_builder);
flac_scan_comments(comment, h);
return tag_builder.Commit();
}