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#include <string.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include "config.h"
#include "mixer.h"
#if defined(USE_OSS_AUDIO)
/*
* Mixer interface using OSS style soundcard commands.
*/
#include <sys/soundcard.h>
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)
/*
* Mixer interface using Sun style soundcard commands.
*/
#include <sys/audioio.h>
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 );
}
}
#else
/*
* No usable Mixer interface selected.
* Just some stub routines.
*/
char * mixer_device=NULL;
int mixer_usemaster=0;
void mixer_getvolume( float *l,float *r ){
*l = *r = 50.0;
}
void mixer_setvolume( float l,float r ){
}
#endif
#define MIXER_CHANGE 3
void mixer_incvolume( void )
{
float mixer_l, mixer_r;
mixer_getvolume( &mixer_l,&mixer_r );
mixer_l += MIXER_CHANGE;
if ( mixer_l > 100 ) mixer_l = 100;
mixer_r += MIXER_CHANGE;
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 -= MIXER_CHANGE;
if ( mixer_l < 0 ) mixer_l = 0;
mixer_r -= MIXER_CHANGE;
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;
}
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