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
148
149
150
151
152
153
154
155
156
157
158
|
/*
* Copyright (C) 2003-2013 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 "config.h"
#include "WildmidiDecoderPlugin.hxx"
#include "DecoderAPI.hxx"
#include "tag/TagHandler.hxx"
#include "util/Error.hxx"
#include "util/Domain.hxx"
#include "fs/AllocatedPath.hxx"
#include "fs/FileSystem.hxx"
#include "system/FatalError.hxx"
#include "Log.hxx"
extern "C" {
#include <wildmidi_lib.h>
}
static constexpr Domain wildmidi_domain("wildmidi");
static constexpr unsigned WILDMIDI_SAMPLE_RATE = 48000;
static bool
wildmidi_init(const config_param ¶m)
{
Error error;
const AllocatedPath path =
param.GetBlockPath("config_file",
"/etc/timidity/timidity.cfg",
error);
if (path.IsNull())
FatalError(error);
if (!FileExists(path)) {
const auto utf8 = path.ToUTF8();
FormatDebug(wildmidi_domain,
"configuration file does not exist: %s",
utf8.c_str());
return false;
}
return WildMidi_Init(path.c_str(), WILDMIDI_SAMPLE_RATE, 0) == 0;
}
static void
wildmidi_finish(void)
{
WildMidi_Shutdown();
}
static void
wildmidi_file_decode(struct decoder *decoder, const char *path_fs)
{
static constexpr AudioFormat audio_format = {
WILDMIDI_SAMPLE_RATE,
SampleFormat::S16,
2,
};
midi *wm;
const struct _WM_Info *info;
wm = WildMidi_Open(path_fs);
if (wm == nullptr)
return;
info = WildMidi_GetInfo(wm);
if (info == nullptr) {
WildMidi_Close(wm);
return;
}
decoder_initialized(decoder, audio_format, true,
info->approx_total_samples / WILDMIDI_SAMPLE_RATE);
DecoderCommand cmd;
do {
char buffer[4096];
int len;
info = WildMidi_GetInfo(wm);
if (info == nullptr)
break;
len = WildMidi_GetOutput(wm, buffer, sizeof(buffer));
if (len <= 0)
break;
cmd = decoder_data(decoder, nullptr, buffer, len, 0);
if (cmd == DecoderCommand::SEEK) {
unsigned long seek_where = WILDMIDI_SAMPLE_RATE *
decoder_seek_where(decoder);
WildMidi_FastSeek(wm, &seek_where);
decoder_command_finished(decoder);
cmd = DecoderCommand::NONE;
}
} while (cmd == DecoderCommand::NONE);
WildMidi_Close(wm);
}
static bool
wildmidi_scan_file(const char *path_fs,
const struct tag_handler *handler, void *handler_ctx)
{
midi *wm = WildMidi_Open(path_fs);
if (wm == nullptr)
return false;
const struct _WM_Info *info = WildMidi_GetInfo(wm);
if (info == nullptr) {
WildMidi_Close(wm);
return false;
}
int duration = info->approx_total_samples / WILDMIDI_SAMPLE_RATE;
tag_handler_invoke_duration(handler, handler_ctx, duration);
WildMidi_Close(wm);
return true;
}
static const char *const wildmidi_suffixes[] = {
"mid",
nullptr
};
const struct decoder_plugin wildmidi_decoder_plugin = {
"wildmidi",
wildmidi_init,
wildmidi_finish,
nullptr,
wildmidi_file_decode,
wildmidi_scan_file,
nullptr,
nullptr,
wildmidi_suffixes,
nullptr,
};
|
