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
  18 int muted = 0;
  19 float mute_l = 0.0f;
  20 float mute_r = 0.0f;
  21
  22 void mixer_getvolume( float *l,float *r )
  23 {
  24   ao_control_vol_t vol;
  25   *l=0; *r=0;
  26   if(audio_out){
  27     if(CONTROL_OK != audio_out->control(AOCONTROL_GET_VOLUME,&vol))
  28       return;
  29     *r=vol.right;
  30     *l=vol.left;
  31   }
  32 }
  33
  34 void mixer_setvolume( float l,float r )
  35 {
  36   ao_control_vol_t vol;
  37   vol.right=r; vol.left=l;
  38   if(audio_out){
  39     if(CONTROL_OK != audio_out->control(AOCONTROL_SET_VOLUME,&vol))
  40       return;
  41   }
  42  muted=0;
  43 }
  44
  45 #define MIXER_CHANGE 3
  46
  47 void mixer_incvolume( void )
  48 {
  49  float mixer_l, mixer_r;
  50  mixer_getvolume( &mixer_l,&mixer_r );
  51  mixer_l += MIXER_CHANGE;
  52  if ( mixer_l > 100 ) mixer_l = 100;
  53  mixer_r += MIXER_CHANGE;
  54  if ( mixer_r > 100 ) mixer_r = 100;
  55  mixer_setvolume( mixer_l,mixer_r );
  56 }
  57
  58 void mixer_decvolume( void )
  59 {
  60  float mixer_l, mixer_r;
  61  mixer_getvolume( &mixer_l,&mixer_r );
  62  mixer_l -= MIXER_CHANGE;
  63  if ( mixer_l < 0 ) mixer_l = 0;
  64  mixer_r -= MIXER_CHANGE;
  65  if ( mixer_r < 0 ) mixer_r = 0;
  66  mixer_setvolume( mixer_l,mixer_r );
  67 }
  68
  69 float mixer_getbothvolume( void )
  70 {
  71  float mixer_l, mixer_r;
  72  mixer_getvolume( &mixer_l,&mixer_r );
  73  return ( mixer_l + mixer_r ) / 2;
  74 }
  75
  76 void mixer_mute( void )
  77 {
  78  if ( muted ) mixer_setvolume( mute_l,mute_r );
  79   else
  80    {
  81     mixer_getvolume( &mute_l,&mute_r );
  82     mixer_setvolume( 0,0 );
  83     muted=1;
  84    }
  85 }
  86
  87
  88