mixer.c

   1 #include <string.h>
   2 #ifndef __MINGW32__
   3 #include <sys/ioctl.h>
   4 #endif
   5 #include <fcntl.h>
   6 #include <stdio.h>
   7 #include <unistd.h>
   8
   9 #include "config.h"
  10 #include "libao2/audio_out.h"
  11 #include "libaf/af.h"
  12 #include "mixer.h"
  13
  14 #include "help_mp.h"
  15
  16 char * mixer_device=NULL;
  17 char * mixer_channel=NULL;
  18 int soft_vol = 0;
  19 float soft_vol_max = 110.0;
  20
  21 void mixer_getvolume(mixer_t *mixer, float *l, float *r)
  22 {
  23   ao_control_vol_t vol;
  24   *l=0; *r=0;
  25   if(mixer->audio_out){
  26     if(soft_vol ||
  27         CONTROL_OK != mixer->audio_out->control(AOCONTROL_GET_VOLUME,&vol)) {
  28       if (!mixer->afilter)
  29         return;
  30       else {
  31         float db_vals[AF_NCH];
  32         if (!af_control_any_rev(mixer->afilter,
  33                AF_CONTROL_VOLUME_LEVEL | AF_CONTROL_GET, db_vals))
  34           db_vals[0] = db_vals[1] = 1.0;
  35         else
  36         af_from_dB (2, db_vals, db_vals, 20.0, -200.0, 60.0);
  37         vol.left = (db_vals[0] / (soft_vol_max / 100.0)) * 100.0;
  38         vol.right = (db_vals[1] / (soft_vol_max / 100.0)) * 100.0;
  39       }
  40     }
  41     *r=vol.right;
  42     *l=vol.left;
  43   }
  44 }
  45
  46 void mixer_setvolume(mixer_t *mixer, float l, float r)
  47 {
  48   ao_control_vol_t vol;
  49   vol.right=r; vol.left=l;
  50   if(mixer->audio_out){
  51     if(soft_vol ||
  52         CONTROL_OK != mixer->audio_out->control(AOCONTROL_SET_VOLUME,&vol)) {
  53       if (!mixer->afilter)
  54         return;
  55       else {
  56         // af_volume uses values in dB
  57         float db_vals[AF_NCH];
  58         int i;
  59         db_vals[0] = (l / 100.0) * (soft_vol_max / 100.0);
  60         db_vals[1] = (r / 100.0) * (soft_vol_max / 100.0);
  61         for (i = 2; i < AF_NCH; i++) {
  62           db_vals[i] = ((l + r) / 100.0) * (soft_vol_max / 100.0) / 2.0;
  63         }
  64         af_to_dB (AF_NCH, db_vals, db_vals, 20.0);
  65         if (!af_control_any_rev(mixer->afilter,
  66                AF_CONTROL_VOLUME_LEVEL | AF_CONTROL_SET, db_vals)) {
  67           mp_msg(MSGT_GLOBAL, MSGL_INFO, MSGTR_InsertingAfVolume);
  68           if (af_add(mixer->afilter, "volume")) {
  69             if (!af_control_any_rev(mixer->afilter,
  70                    AF_CONTROL_VOLUME_LEVEL | AF_CONTROL_SET, db_vals)) {
  71               mp_msg(MSGT_GLOBAL, MSGL_ERR, MSGTR_NoVolume);
  72               return;
  73             }
  74           }
  75         }
  76       }
  77     }
  78   }
  79  mixer->muted=0;
  80 }
  81
  82 void mixer_incvolume(mixer_t *mixer)
  83 {
  84  float mixer_l, mixer_r;
  85  mixer_getvolume(mixer, &mixer_l, &mixer_r);
  86  mixer_l += mixer->volstep;
  87  if ( mixer_l > 100 ) mixer_l = 100;
  88  mixer_r += mixer->volstep;
  89  if ( mixer_r > 100 ) mixer_r = 100;
  90  mixer_setvolume(mixer, mixer_l, mixer_r);
  91 }
  92
  93 void mixer_decvolume(mixer_t *mixer)
  94 {
  95  float mixer_l, mixer_r;
  96  mixer_getvolume(mixer, &mixer_l, &mixer_r);
  97  mixer_l -= mixer->volstep;
  98  if ( mixer_l < 0 ) mixer_l = 0;
  99  mixer_r -= mixer->volstep;
 100  if ( mixer_r < 0 ) mixer_r = 0;
 101  mixer_setvolume(mixer, mixer_l, mixer_r);
 102 }
 103
 104 void mixer_getbothvolume(mixer_t *mixer, float *b)
 105 {
 106  float mixer_l, mixer_r;
 107  mixer_getvolume(mixer, &mixer_l, &mixer_r);
 108  *b = ( mixer_l + mixer_r ) / 2;
 109 }
 110
 111 void mixer_mute(mixer_t *mixer)
 112 {
 113  if (mixer->muted) mixer_setvolume(mixer, mixer->last_l, mixer->last_r);
 114   else
 115    {
 116     mixer_getvolume(mixer, &mixer->last_l, &mixer->last_r);
 117     mixer_setvolume(mixer, 0, 0);
 118     mixer->muted=1;
 119    }
 120 }