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
  21 #include "config.h"
  22 #include "libao2/audio_out.h"
  23 #include "libaf/af.h"
  24 #include "mp_msg.h"
  25 #include "mixer.h"
  26
  27
  28 void mixer_getvolume(mixer_t *mixer, float *l, float *r)
  29 {
  30     *l = 0;
  31     *r = 0;
  32     if (!mixer->ao)
  33         return;
  34
  35     ao_control_vol_t vol;
  36     if (mixer->softvol || CONTROL_OK != ao_control(mixer->ao,
  37                                                 AOCONTROL_GET_VOLUME, &vol)) {
  38         float db_vals[AF_NCH];
  39         if (!af_control_any_rev(mixer->afilter,
  40                         AF_CONTROL_VOLUME_LEVEL | AF_CONTROL_GET, db_vals))
  41             db_vals[0] = db_vals[1] = 1.0;
  42         else
  43             af_from_dB(2, db_vals, db_vals, 20.0, -200.0, 60.0);
  44         vol.left = (db_vals[0] / (mixer->softvol_max / 100.0)) * 100.0;
  45         vol.right = (db_vals[1] / (mixer->softvol_max / 100.0)) * 100.0;
  46     }
  47     *r = vol.right;
  48     *l = vol.left;
  49 }
  50
  51 void mixer_setvolume(mixer_t *mixer, float l, float r)
  52 {
  53     if (!mixer->ao) {
  54         mixer->muted = 0;
  55         return;
  56     }
  57     ao_control_vol_t vol;
  58     vol.right = r;
  59     vol.left = l;
  60     if (mixer->softvol || CONTROL_OK != ao_control(mixer->ao,
  61                                                 AOCONTROL_SET_VOLUME, &vol)) {
  62         // af_volume uses values in dB
  63         float db_vals[AF_NCH];
  64         int i;
  65         db_vals[0] = (l / 100.0) * (mixer->softvol_max / 100.0);
  66         db_vals[1] = (r / 100.0) * (mixer->softvol_max / 100.0);
  67         for (i = 2; i < AF_NCH; i++)
  68             db_vals[i] = ((l + r) / 100.0) * (mixer->softvol_max / 100.0) / 2.0;
  69         af_to_dB(AF_NCH, db_vals, db_vals, 20.0);
  70         if (!af_control_any_rev(mixer->afilter,
  71                 AF_CONTROL_VOLUME_LEVEL | AF_CONTROL_SET, db_vals)) {
  72             mp_tmsg(MSGT_GLOBAL, MSGL_INFO,
  73                     "[Mixer] No hardware mixing, inserting volume filter.\n");
  74             if (af_add(mixer->afilter, "volume")) {
  75                 if (!af_control_any_rev(mixer->afilter,
  76                            AF_CONTROL_VOLUME_LEVEL|AF_CONTROL_SET, db_vals)) {
  77                     mp_tmsg(MSGT_GLOBAL, MSGL_ERR,
  78                             "[Mixer] No volume control available.\n");
  79                     return;
  80                 }
  81             }
  82         }
  83     }
  84     mixer->muted = 0;
  85 }
  86
  87 void mixer_incvolume(mixer_t *mixer)
  88 {
  89     float mixer_l, mixer_r;
  90     mixer_getvolume(mixer, &mixer_l, &mixer_r);
  91     mixer_l += mixer->volstep;
  92     if (mixer_l > 100)
  93         mixer_l = 100;
  94     mixer_r += mixer->volstep;
  95     if (mixer_r > 100)
  96         mixer_r = 100;
  97     mixer_setvolume(mixer, mixer_l, mixer_r);
  98 }
  99
 100 void mixer_decvolume(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 < 0)
 106         mixer_l = 0;
 107     mixer_r -= mixer->volstep;
 108     if (mixer_r < 0)
 109         mixer_r = 0;
 110     mixer_setvolume(mixer, mixer_l, mixer_r);
 111 }
 112
 113 void mixer_getbothvolume(mixer_t *mixer, float *b)
 114 {
 115     float mixer_l, mixer_r;
 116     mixer_getvolume(mixer, &mixer_l, &mixer_r);
 117     *b = (mixer_l + mixer_r) / 2;
 118 }
 119
 120 void mixer_mute(mixer_t *mixer)
 121 {
 122     if (mixer->muted) {
 123         mixer_setvolume(mixer, mixer->last_l, mixer->last_r);
 124     } else {
 125         mixer_getvolume(mixer, &mixer->last_l, &mixer->last_r);
 126         mixer_setvolume(mixer, 0, 0);
 127         mixer->muted = 1;
 128     }
 129 }
 130
 131 void mixer_getbalance(mixer_t *mixer, float *val)
 132 {
 133     *val = 0.f;
 134     if (!mixer->afilter)
 135         return;
 136     af_control_any_rev(mixer->afilter, AF_CONTROL_PAN_BALANCE | AF_CONTROL_GET,
 137                        val);
 138 }
 139
 140 void mixer_setbalance(mixer_t *mixer, float val)
 141 {
 142     float level[AF_NCH];
 143     int i;
 144     af_control_ext_t arg_ext = { .arg = level };
 145     af_instance_t *af_pan_balance;
 146
 147     if (!mixer->afilter)
 148         return;
 149
 150     if (af_control_any_rev(mixer->afilter,
 151                            AF_CONTROL_PAN_BALANCE | AF_CONTROL_SET, &val))
 152         return;
 153
 154     if (!(af_pan_balance = af_add(mixer->afilter, "pan"))) {
 155         mp_tmsg(MSGT_GLOBAL, MSGL_ERR,
 156                 "[Mixer] No balance control available.\n");
 157         return;
 158     }
 159
 160     af_init(mixer->afilter);
 161     /* make all other channels pass thru since by default pan blocks all */
 162     memset(level, 0, sizeof(level));
 163     for (i = 2; i < AF_NCH; i++) {
 164         arg_ext.ch = i;
 165         level[i] = 1.f;
 166         af_pan_balance->control(af_pan_balance,
 167                                 AF_CONTROL_PAN_LEVEL | AF_CONTROL_SET,
 168                                 &arg_ext);
 169         level[i] = 0.f;
 170     }
 171
 172     af_pan_balance->control(af_pan_balance,
 173                             AF_CONTROL_PAN_BALANCE | AF_CONTROL_SET, &val);
 174 }