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
|
/*
* Copyright (C) 2003-2014 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 "MixerControl.hxx"
#include "MixerList.hxx"
#include "FilterRegistry.hxx"
#include "pcm/Volume.hxx"
#include "GlobalEvents.hxx"
#include "Main.hxx"
#include "event/Loop.hxx"
#include "ConfigData.hxx"
#include "util/Error.hxx"
#include "Log.hxx"
#include <glib.h>
#include <assert.h>
#include <string.h>
#include <unistd.h>
EventLoop *main_loop;
#ifdef HAVE_PULSE
#include "output/PulseOutputPlugin.hxx"
void
pulse_output_lock(gcc_unused PulseOutput *po)
{
}
void
pulse_output_unlock(gcc_unused PulseOutput *po)
{
}
void
pulse_output_set_mixer(gcc_unused PulseOutput *po,
gcc_unused PulseMixer *pm)
{
}
void
pulse_output_clear_mixer(gcc_unused PulseOutput *po,
gcc_unused PulseMixer *pm)
{
}
bool
pulse_output_set_volume(gcc_unused PulseOutput *po,
gcc_unused const struct pa_cvolume *volume,
gcc_unused Error &error)
{
return false;
}
#endif
#ifdef HAVE_ROAR
#include "output/RoarOutputPlugin.hxx"
int
roar_output_get_volume(gcc_unused RoarOutput *roar)
{
return -1;
}
bool
roar_output_set_volume(gcc_unused RoarOutput *roar,
gcc_unused unsigned volume)
{
return true;
}
#endif
void
GlobalEvents::Emit(gcc_unused Event event)
{
}
const struct filter_plugin *
filter_plugin_by_name(gcc_unused const char *name)
{
assert(false);
return NULL;
}
int main(int argc, gcc_unused char **argv)
{
int volume;
if (argc != 2) {
fprintf(stderr, "Usage: read_mixer PLUGIN\n");
return EXIT_FAILURE;
}
#if !GLIB_CHECK_VERSION(2,32,0)
g_thread_init(NULL);
#endif
main_loop = new EventLoop(EventLoop::Default());
Error error;
Mixer *mixer = mixer_new(&alsa_mixer_plugin, nullptr,
config_param(), error);
if (mixer == NULL) {
LogError(error, "mixer_new() failed");
return EXIT_FAILURE;
}
if (!mixer_open(mixer, error)) {
mixer_free(mixer);
LogError(error, "failed to open the mixer");
return EXIT_FAILURE;
}
volume = mixer_get_volume(mixer, error);
mixer_close(mixer);
mixer_free(mixer);
delete main_loop;
assert(volume >= -1 && volume <= 100);
if (volume < 0) {
if (error.IsDefined()) {
LogError(error, "failed to read volume");
} else
fprintf(stderr, "failed to read volume\n");
return EXIT_FAILURE;
}
printf("%d\n", volume);
return 0;
}
|
