mixer.c

   1 /*
   2  * This file is part of MPlayer.
   3  *
   4  * MPlayer is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * MPlayer is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 #include <string.h>
  20 #ifndef __MINGW32__
  21 #include <sys/ioctl.h>
  22 #endif
  23 #include <fcntl.h>
  24 #include <stdio.h>
  25 #include <unistd.h>
  26
  27 #include "config.h"
  28 #include "libao2/audio_out.h"
  29 #include "libaf/af.h"
  30 #include "mixer.h"
  31
  32
  33 char * mixer_device=NULL;
  34 char * mixer_channel=NULL;
  35 int soft_vol = 0;
  36 float soft_vol_max = 110.0;
  37
  38 void mixer_getvolume(mixer_t *mixer, float *l, float *r)
  39 {
  40   ao_control_vol_t vol;
  41   *l=0; *r=0;
  42   if(mixer->audio_out){
  43     if(soft_vol ||
  44         CONTROL_OK != mixer->audio_out->control(AOCONTROL_GET_VOLUME,&vol)) {
  45       if (!mixer->afilter)
  46         return;
  47       else {
  48         float db_vals[AF_NCH];
  49         if (!af_control_any_rev(mixer->afilter,
  50                AF_CONTROL_VOLUME_LEVEL | AF_CONTROL_GET, db_vals))
  51           db_vals[0] = db_vals[1] = 1.0;
  52         else
  53         af_from_dB (2, db_vals, db_vals, 20.0, -200.0, 60.0);
  54         vol.left = (db_vals[0] / (soft_vol_max / 100.0)) * 100.0;
  55         vol.right = (db_vals[1] / (soft_vol_max / 100.0)) * 100.0;
  56       }
  57     }
  58     *r=vol.right;
  59     *l=vol.left;
  60   }
  61 }
  62
  63 void mixer_setvolume(mixer_t *mixer, float l, float r)
  64 {
  65   ao_control_vol_t vol;
  66   vol.right=r; vol.left=l;
  67   if(mixer->audio_out){
  68     if(soft_vol ||
  69         CONTROL_OK != mixer->audio_out->control(AOCONTROL_SET_VOLUME,&vol)) {
  70       if (!mixer->afilter)
  71         return;
  72       else {
  73         // af_volume uses values in dB
  74         float db_vals[AF_NCH];
  75         int i;
  76         db_vals[0] = (l / 100.0) * (soft_vol_max / 100.0);
  77         db_vals[1] = (r / 100.0) * (soft_vol_max / 100.0);
  78         for (i = 2; i < AF_NCH; i++) {
  79           db_vals[i] = ((l + r) / 100.0) * (soft_vol_max / 100.0) / 2.0;
  80         }
  81         af_to_dB (AF_NCH, db_vals, db_vals, 20.0);
  82         if (!af_control_any_rev(mixer->afilter,
  83                AF_CONTROL_VOLUME_LEVEL | AF_CONTROL_SET, db_vals)) {
  84           mp_tmsg(MSGT_GLOBAL, MSGL_INFO, "[Mixer] No hardware mixing, inserting volume filter.\n");
  85           if (af_add(mixer->afilter, "volume")) {
  86             if (!af_control_any_rev(mixer->afilter,
  87                    AF_CONTROL_VOLUME_LEVEL | AF_CONTROL_SET, db_vals)) {
  88               mp_tmsg(MSGT_GLOBAL, MSGL_ERR, "[Mixer] No volume control available.\n");
  89               return;
  90             }
  91           }
  92         }
  93       }
  94     }
  95   }
  96  mixer->muted=0;
  97 }
  98
  99 void mixer_incvolume(mixer_t *mixer)
 100 {
 101  float mixer_l, mixer_r;
 102  mixer_getvolume(mixer, &mixer_l, &mixer_r);
 103  mixer_l += mixer->volstep;
 104  if ( mixer_l > 100 ) mixer_l = 100;
 105  mixer_r += mixer->volstep;
 106  if ( mixer_r > 100 ) mixer_r = 100;
 107  mixer_setvolume(mixer, mixer_l, mixer_r);
 108 }
 109
 110 void mixer_decvolume(mixer_t *mixer)
 111 {
 112  float mixer_l, mixer_r;
 113  mixer_getvolume(mixer, &mixer_l, &mixer_r);
 114  mixer_l -= mixer->volstep;
 115  if ( mixer_l < 0 ) mixer_l = 0;
 116  mixer_r -= mixer->volstep;
 117  if ( mixer_r < 0 ) mixer_r = 0;
 118  mixer_setvolume(mixer, mixer_l, mixer_r);
 119 }
 120
 121 void mixer_getbothvolume(mixer_t *mixer, float *b)
 122 {
 123  float mixer_l, mixer_r;
 124  mixer_getvolume(mixer, &mixer_l, &mixer_r);
 125  *b = ( mixer_l + mixer_r ) / 2;
 126 }
 127
 128 void mixer_mute(mixer_t *mixer)
 129 {
 130  if (mixer->muted) mixer_setvolume(mixer, mixer->last_l, mixer->last_r);
 131   else
 132    {
 133     mixer_getvolume(mixer, &mixer->last_l, &mixer->last_r);
 134     mixer_setvolume(mixer, 0, 0);
 135     mixer->muted=1;
 136    }
 137 }
 138
 139 void mixer_getbalance(mixer_t *mixer, float *val)
 140 {
 141   *val = 0.f;
 142   if(!mixer->afilter)
 143     return;
 144   af_control_any_rev(mixer->afilter,
 145       AF_CONTROL_PAN_BALANCE | AF_CONTROL_GET, val);
 146 }
 147
 148 void mixer_setbalance(mixer_t *mixer, float val)
 149 {
 150   float level[AF_NCH];
 151   int i;
 152   af_control_ext_t arg_ext = { .arg = level };
 153   af_instance_t* af_pan_balance;
 154
 155   if(!mixer->afilter)
 156     return;
 157   if (af_control_any_rev(mixer->afilter,
 158         AF_CONTROL_PAN_BALANCE | AF_CONTROL_SET, &val))
 159     return;
 160
 161   if (!(af_pan_balance = af_add(mixer->afilter, "pan"))) {
 162     mp_tmsg(MSGT_GLOBAL, MSGL_ERR, "[Mixer] No balance control available.\n");
 163     return;
 164   }
 165
 166   af_init(mixer->afilter);
 167   /* make all other channels pass thru since by default pan blocks all */
 168   memset(level, 0, sizeof(level));
 169   for (i = 2; i < AF_NCH; i++) {
 170     arg_ext.ch = i;
 171     level[i] = 1.f;
 172     af_pan_balance->control(af_pan_balance,
 173         AF_CONTROL_PAN_LEVEL | AF_CONTROL_SET, &arg_ext);
 174     level[i] = 0.f;
 175   }
 176
 177   af_pan_balance->control(af_pan_balance,
 178       AF_CONTROL_PAN_BALANCE | AF_CONTROL_SET, &val);
 179 }