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
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
/*
* 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 "FluidsynthDecoderPlugin.hxx"
#include "DecoderAPI.hxx"
#include "CheckAudioFormat.hxx"
#include "util/Error.hxx"
#include "util/Domain.hxx"
#include "Log.hxx"
#include <glib.h>
#include <fluidsynth.h>
static constexpr Domain fluidsynth_domain("fluidsynth");
static unsigned sample_rate;
static const char *soundfont_path;
/**
* Convert a fluidsynth log level to a GLib log level.
*/
static LogLevel
fluidsynth_level_to_mpd(enum fluid_log_level level)
{
switch (level) {
case FLUID_PANIC:
case FLUID_ERR:
return LogLevel::ERROR;
case FLUID_WARN:
return LogLevel::WARNING;
case FLUID_INFO:
return LogLevel::INFO;
case FLUID_DBG:
case LAST_LOG_LEVEL:
return LogLevel::DEBUG;
}
/* invalid fluidsynth log level */
return LogLevel::INFO;
}
/**
* The fluidsynth logging callback. It forwards messages to the GLib
* logging library.
*/
static void
fluidsynth_mpd_log_function(int level, char *message, gcc_unused void *data)
{
Log(fluidsynth_domain,
fluidsynth_level_to_mpd(fluid_log_level(level)),
message);
}
static bool
fluidsynth_init(const config_param ¶m)
{
Error error;
sample_rate = param.GetBlockValue("sample_rate", 48000u);
if (!audio_check_sample_rate(sample_rate, error)) {
LogError(error);
return false;
}
soundfont_path = param.GetBlockValue("soundfont",
"/usr/share/sounds/sf2/FluidR3_GM.sf2");
fluid_set_log_function(LAST_LOG_LEVEL,
fluidsynth_mpd_log_function, nullptr);
return true;
}
static void
fluidsynth_file_decode(struct decoder *decoder, const char *path_fs)
{
char setting_sample_rate[] = "synth.sample-rate";
/*
char setting_verbose[] = "synth.verbose";
char setting_yes[] = "yes";
*/
fluid_settings_t *settings;
fluid_synth_t *synth;
fluid_player_t *player;
int ret;
/* set up fluid settings */
settings = new_fluid_settings();
if (settings == nullptr)
return;
fluid_settings_setnum(settings, setting_sample_rate, sample_rate);
/*
fluid_settings_setstr(settings, setting_verbose, setting_yes);
*/
/* create the fluid synth */
synth = new_fluid_synth(settings);
if (synth == nullptr) {
delete_fluid_settings(settings);
return;
}
ret = fluid_synth_sfload(synth, soundfont_path, true);
if (ret < 0) {
LogWarning(fluidsynth_domain, "fluid_synth_sfload() failed");
delete_fluid_synth(synth);
delete_fluid_settings(settings);
return;
}
/* create the fluid player */
player = new_fluid_player(synth);
if (player == nullptr) {
delete_fluid_synth(synth);
delete_fluid_settings(settings);
return;
}
ret = fluid_player_add(player, path_fs);
if (ret != 0) {
LogWarning(fluidsynth_domain, "fluid_player_add() failed");
delete_fluid_player(player);
delete_fluid_synth(synth);
delete_fluid_settings(settings);
return;
}
/* start the player */
ret = fluid_player_play(player);
if (ret != 0) {
LogWarning(fluidsynth_domain, "fluid_player_play() failed");
delete_fluid_player(player);
delete_fluid_synth(synth);
delete_fluid_settings(settings);
return;
}
/* initialization complete - announce the audio format to the
MPD core */
const AudioFormat audio_format(sample_rate, SampleFormat::S16, 2);
decoder_initialized(decoder, audio_format, false, -1);
DecoderCommand cmd;
while (fluid_player_get_status(player) == FLUID_PLAYER_PLAYING) {
int16_t buffer[2048];
const unsigned max_frames = G_N_ELEMENTS(buffer) / 2;
/* read samples from fluidsynth and send them to the
MPD core */
ret = fluid_synth_write_s16(synth, max_frames,
buffer, 0, 2,
buffer, 1, 2);
if (ret != 0)
break;
cmd = decoder_data(decoder, nullptr, buffer, sizeof(buffer),
0);
if (cmd != DecoderCommand::NONE)
break;
}
/* clean up */
fluid_player_stop(player);
fluid_player_join(player);
delete_fluid_player(player);
delete_fluid_synth(synth);
delete_fluid_settings(settings);
}
static bool
fluidsynth_scan_file(const char *file,
gcc_unused const struct tag_handler *handler,
gcc_unused void *handler_ctx)
{
return fluid_is_midifile(file);
}
static const char *const fluidsynth_suffixes[] = {
"mid",
nullptr
};
const struct decoder_plugin fluidsynth_decoder_plugin = {
"fluidsynth",
fluidsynth_init,
nullptr,
nullptr,
fluidsynth_file_decode,
fluidsynth_scan_file,
nullptr,
nullptr,
fluidsynth_suffixes,
nullptr,
};
|
