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 #include "help_mp.h"
  33
  34 char * mixer_device=NULL;
  35 char * mixer_channel=NULL;
  36 int soft_vol = 0;
  37 float soft_vol_max = 110.0;
  38
  39 void mixer_getvolume(mixer_t *mixer, float *l, float *r)
  40 {
  41   ao_control_vol_t vol;
  42   *l=0; *r=0;
  43   if(mixer->audio_out){
  44     if(soft_vol ||
  45         CONTROL_OK != mixer->audio_out->control(AOCONTROL_GET_VOLUME,&vol)) {
  46       if (!mixer->afilter)
  47         return;
  48       else {
  49         float db_vals[AF_NCH];
  50         if (!af_control_any_rev(mixer->afilter,
  51                AF_CONTROL_VOLUME_LEVEL | AF_CONTROL_GET, db_vals))
  52           db_vals[0] = db_vals[1] = 1.0;
  53         else
  54         af_from_dB (2, db_vals, db_vals, 20.0, -200.0, 60.0);
  55         vol.left = (db_vals[0] / (soft_vol_max / 100.0)) * 100.0;
  56         vol.right = (db_vals[1] / (soft_vol_max / 100.0)) * 100.0;
  57       }
  58     }
  59     *r=vol.right;
  60     *l=vol.left;
  61   }
  62 }
  63
  64 void mixer_setvolume(mixer_t *mixer, float l, float r)
  65 {
  66   ao_control_vol_t vol;
  67   vol.right=r; vol.left=l;
  68   if(mixer->audio_out){
  69     if(soft_vol ||
  70         CONTROL_OK != mixer->audio_out->control(AOCONTROL_SET_VOLUME,&vol)) {
  71       if (!mixer->afilter)
  72         return;
  73       else {
  74         // af_volume uses values in dB
  75         float db_vals[AF_NCH];
  76         int i;
  77         db_vals[0] = (l / 100.0) * (soft_vol_max / 100.0);
  78         db_vals[1] = (r / 100.0) * (soft_vol_max / 100.0);
  79         for (i = 2; i < AF_NCH; i++) {
  80           db_vals[i] = ((l + r) / 100.0) * (soft_vol_max / 100.0) / 2.0;
  81         }
  82         af_to_dB (AF_NCH, db_vals, db_vals, 20.0);
  83         if (!af_control_any_rev(mixer->afilter,
  84                AF_CONTROL_VOLUME_LEVEL | AF_CONTROL_SET, db_vals)) {
  85           mp_tmsg(MSGT_GLOBAL, MSGL_INFO, "[Mixer] No hardware mixing, inserting volume filter.\n");
  86           if (af_add(mixer->afilter, "volume")) {
  87             if (!af_control_any_rev(mixer->afilter,
  88                    AF_CONTROL_VOLUME_LEVEL | AF_CONTROL_SET, db_vals)) {
  89               mp_tmsg(MSGT_GLOBAL, MSGL_ERR, "[Mixer] No volume control available.\n");
  90               return;
  91             }
  92           }
  93         }
  94       }
  95     }
  96   }
  97  mixer->muted=0;
  98 }
  99
 100 void mixer_incvolume(mixer_t *mixer)
 101 {
 102  float mixer_l, mixer_r;
 103  mixer_getvolume(mixer, &mixer_l, &mixer_r);
 104  mixer_l += mixer->volstep;
 105  if ( mixer_l > 100 ) mixer_l = 100;
 106  mixer_r += mixer->volstep;
 107  if ( mixer_r > 100 ) mixer_r = 100;
 108  mixer_setvolume(mixer, mixer_l, mixer_r);
 109 }
 110
 111 void mixer_decvolume(mixer_t *mixer)
 112 {
 113  float mixer_l, mixer_r;
 114  mixer_getvolume(mixer, &mixer_l, &mixer_r);
 115  mixer_l -= mixer->volstep;
 116  if ( mixer_l < 0 ) mixer_l = 0;
 117  mixer_r -= mixer->volstep;
 118  if ( mixer_r < 0 ) mixer_r = 0;
 119  mixer_setvolume(mixer, mixer_l, mixer_r);
 120 }
 121
 122 void mixer_getbothvolume(mixer_t *mixer, float *b)
 123 {
 124  float mixer_l, mixer_r;
 125  mixer_getvolume(mixer, &mixer_l, &mixer_r);
 126  *b = ( mixer_l + mixer_r ) / 2;
 127 }
 128
 129 void mixer_mute(mixer_t *mixer)
 130 {
 131  if (mixer->muted) mixer_setvolume(mixer, mixer->last_l, mixer->last_r);
 132   else
 133    {
 134     mixer_getvolume(mixer, &mixer->last_l, &mixer->last_r);
 135     mixer_setvolume(mixer, 0, 0);
 136     mixer->muted=1;
 137    }
 138 }
 139
 140 void mixer_getbalance(mixer_t *mixer, float *val)
 141 {
 142   *val = 0.f;
 143   if(!mixer->afilter)
 144     return;
 145   af_control_any_rev(mixer->afilter,
 146       AF_CONTROL_PAN_BALANCE | AF_CONTROL_GET, val);
 147 }
 148
 149 void mixer_setbalance(mixer_t *mixer, float val)
 150 {
 151   float level[AF_NCH];
 152   int i;
 153   af_control_ext_t arg_ext = { .arg = level };
 154   af_instance_t* af_pan_balance;
 155
 156   if(!mixer->afilter)
 157     return;
 158   if (af_control_any_rev(mixer->afilter,
 159         AF_CONTROL_PAN_BALANCE | AF_CONTROL_SET, &val))
 160     return;
 161
 162   if (!(af_pan_balance = af_add(mixer->afilter, "pan"))) {
 163     mp_tmsg(MSGT_GLOBAL, MSGL_ERR, "[Mixer] No balance control available.\n");
 164     return;
 165   }
 166
 167   af_init(mixer->afilter);
 168   /* make all other channels pass thru since by default pan blocks all */
 169   memset(level, 0, sizeof(level));
 170   for (i = 2; i < AF_NCH; i++) {
 171     arg_ext.ch = i;
 172     level[i] = 1.f;
 173     af_pan_balance->control(af_pan_balance,
 174         AF_CONTROL_PAN_LEVEL | AF_CONTROL_SET, &arg_ext);
 175     level[i] = 0.f;
 176   }
 177
 178   af_pan_balance->control(af_pan_balance,
 179       AF_CONTROL_PAN_BALANCE | AF_CONTROL_SET, &val);
 180 }