mixer.c

   1
   2 #include <string.h>
   3 #ifndef __MINGW32__
   4 #include <sys/ioctl.h>
   5 #endif
   6 #include <fcntl.h>
   7 #include <stdio.h>
   8 #include <unistd.h>
   9
  10 #include "config.h"
  11 #include "mixer.h"
  12 #include "libao2/audio_out.h"
  13
  14 extern ao_functions_t *audio_out;
  15
  16 char * mixer_device=NULL;
  17 char * mixer_channel=NULL;
  18
  19 int muted = 0;
  20 float mute_l = 0.0f;
  21 float mute_r = 0.0f;
  22
  23 void mixer_getvolume( float *l,float *r )
  24 {
  25   ao_control_vol_t vol;
  26   *l=0; *r=0;
  27   if(audio_out){
  28     if(CONTROL_OK != audio_out->control(AOCONTROL_GET_VOLUME,&vol))
  29       return;
  30     *r=vol.right;
  31     *l=vol.left;
  32   }
  33 }
  34
  35 void mixer_setvolume( float l,float r )
  36 {
  37   ao_control_vol_t vol;
  38   vol.right=r; vol.left=l;
  39   if(audio_out){
  40     if(CONTROL_OK != audio_out->control(AOCONTROL_SET_VOLUME,&vol))
  41       return;
  42   }
  43  muted=0;
  44 }
  45
  46 #define MIXER_CHANGE 3
  47
  48 void mixer_incvolume( void )
  49 {
  50  float mixer_l, mixer_r;
  51  mixer_getvolume( &mixer_l,&mixer_r );
  52  mixer_l += MIXER_CHANGE;
  53  if ( mixer_l > 100 ) mixer_l = 100;
  54  mixer_r += MIXER_CHANGE;
  55  if ( mixer_r > 100 ) mixer_r = 100;
  56  mixer_setvolume( mixer_l,mixer_r );
  57 }
  58
  59 void mixer_decvolume( void )
  60 {
  61  float mixer_l, mixer_r;
  62  mixer_getvolume( &mixer_l,&mixer_r );
  63  mixer_l -= MIXER_CHANGE;
  64  if ( mixer_l < 0 ) mixer_l = 0;
  65  mixer_r -= MIXER_CHANGE;
  66  if ( mixer_r < 0 ) mixer_r = 0;
  67  mixer_setvolume( mixer_l,mixer_r );
  68 }
  69
  70 float mixer_getbothvolume( void )
  71 {
  72  float mixer_l, mixer_r;
  73  mixer_getvolume( &mixer_l,&mixer_r );
  74  return ( mixer_l + mixer_r ) / 2;
  75 }
  76
  77 void mixer_mute( void )
  78 {
  79  if ( muted ) mixer_setvolume( mute_l,mute_r );
  80   else
  81    {
  82     mixer_getvolume( &mute_l,&mute_r );
  83     mixer_setvolume( 0,0 );
  84     muted=1;
  85    }
  86 }
  87
  88
  89