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#include <string.h>
#include <sys/ioctl.h>
#ifdef __sun
#include <sys/audioio.h>
#else
#include <sys/soundcard.h>
#endif
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include "mixer.h"
#ifdef __sun
char * mixer_device="/dev/audioctl";
#else
char * mixer_device="/dev/mixer";
#endif
int mixer_usemaster=0;
void mixer_getvolume( int *l,int *r )
{
int fd,v,cmd,devs;
fd=open( mixer_device,O_RDONLY );
if ( fd != -1 )
{
#ifdef __sun
audio_info_t info;
ioctl( fd,AUDIO_GETINFO,&info );
*r=*l=(info.play.gain * 100 + (AUDIO_MAX_GAIN-1))/AUDIO_MAX_GAIN;
#else
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 );
#endif
close( fd );
}
}
void mixer_setvolume( int l,int r )
{
int fd,v,cmd,devs;
fd=open( mixer_device,O_RDONLY );
if ( fd != -1 )
{
#ifdef __sun
audio_info_t info;
ioctl( fd,AUDIO_GETINFO,&info );
info.play.gain = ((l+r)*AUDIO_MAX_GAIN+199)/200;
ioctl( fd,AUDIO_SETINFO,&info );
#else
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=( r << 8 ) | l;
ioctl( fd,cmd,&v );
#endif
close( fd );
}
}
int mixer_l=0; int mixer_r=0;
void mixer_incvolume( void )
{
mixer_getvolume( &mixer_l,&mixer_r );
if ( mixer_l < 100 ) mixer_l++;
if ( mixer_r < 100 ) mixer_r++;
mixer_setvolume( mixer_l,mixer_r );
}
void mixer_decvolume( void )
{
mixer_getvolume( &mixer_l,&mixer_r );
if ( mixer_l > 0 ) mixer_l--;
if ( mixer_r > 0 ) mixer_r--;
mixer_setvolume( mixer_l,mixer_r );
}
int mixer_getbothvolume( void )
{
mixer_getvolume( &mixer_l,&mixer_r );
return ( mixer_l + mixer_r ) / 2;
}
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