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
|
#include <string.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include "config.h"
#ifdef USE_OSS_AUDIO
#include <sys/soundcard.h>
#endif
#ifdef USE_SUN_AUDIO
#include <sys/audioio.h>
#endif
#include "mixer.h"
#if defined(USE_OSS_AUDIO)
char * mixer_device=DEV_MIXER;
int mixer_usemaster=0;
void mixer_getvolume( float *l,float *r )
{
int fd,v,cmd,devs;
fd=open( mixer_device,O_RDONLY );
if ( fd != -1 )
{
ioctl( fd,SOUND_MIXER_READ_DEVMASK,&devs );
if ( ( devs & SOUND_MASK_PCM ) && ( mixer_usemaster==0 ) ) cmd=SOUND_MIXER_READ_PCM;
else
if ( ( devs & SOUND_MASK_VOLUME ) && ( mixer_usemaster==1 ) ) cmd=SOUND_MIXER_READ_VOLUME;
else
{
close( fd );
return;
}
ioctl( fd,cmd,&v );
*r=( v & 0xFF00 ) >> 8;
*l=( v & 0x00FF );
close( fd );
}
}
void mixer_setvolume( float l,float r )
{
int fd,v,cmd,devs;
fd=open( mixer_device,O_RDONLY );
if ( fd != -1 )
{
ioctl( fd,SOUND_MIXER_READ_DEVMASK,&devs );
if ( ( devs & SOUND_MASK_PCM ) && ( mixer_usemaster==0 ) ) cmd=SOUND_MIXER_WRITE_PCM;
else
if ( ( devs & SOUND_MASK_VOLUME ) && ( mixer_usemaster==1 ) ) cmd=SOUND_MIXER_WRITE_VOLUME;
else
{
close( fd );
return;
}
v=( (int)r << 8 ) | (int)l;
ioctl( fd,cmd,&v );
close( fd );
}
}
#elif defined(USE_SUN_AUDIO)
char * mixer_device="/dev/audioctl";
int mixer_usemaster=0;
void mixer_getvolume( float *l,float *r )
{
int fd,v,cmd,devs;
fd=open( mixer_device,O_RDONLY );
if ( fd != -1 )
{
struct audio_info info;
ioctl( fd,AUDIO_GETINFO,&info);
*r=info.play.gain * 100. / AUDIO_MAX_GAIN;
*l=info.play.gain * 100. / AUDIO_MAX_GAIN;
close( fd );
}
}
void mixer_setvolume( float l,float r )
{
int fd,v,cmd,devs;
fd=open( mixer_device,O_RDONLY );
if ( fd != -1 )
{
struct audio_info info;
AUDIO_INITINFO(&info);
info.play.gain = (r+l) * AUDIO_MAX_GAIN / 100 / 2;
ioctl( fd,AUDIO_SETINFO,&info );
close( fd );
}
}
#endif
void mixer_incvolume( void )
{
float mixer_l, mixer_r;
mixer_getvolume( &mixer_l,&mixer_r );
mixer_l++;
if ( mixer_l > 100 ) mixer_l = 100;
mixer_r++;
if ( mixer_r > 100 ) mixer_r = 100;
mixer_setvolume( mixer_l,mixer_r );
}
void mixer_decvolume( void )
{
float mixer_l, mixer_r;
mixer_getvolume( &mixer_l,&mixer_r );
mixer_l--;
if ( mixer_l < 0 ) mixer_l = 0;
mixer_r--;
if ( mixer_r < 0 ) mixer_r = 0;
mixer_setvolume( mixer_l,mixer_r );
}
float mixer_getbothvolume( void )
{
float mixer_l, mixer_r;
mixer_getvolume( &mixer_l,&mixer_r );
return ( mixer_l + mixer_r ) / 2;
}
|
