From ba3c4568fb1ac38da3cc3b098434ac399ba7bb7d Mon Sep 17 00:00:00 2001
From: alex <alex@b3059339-0415-0410-9bf9-f77b7e298cf2>
Date: Sat, 26 Jun 2004 09:14:20 +0000
Subject: New 'Mixer API' with ability to change volume through libaf (this
 part was written by Reimar Doffinger) and lesser global variables

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@12673 b3059339-0415-0410-9bf9-f77b7e298cf2
---
 mixer.c | 100 +++++++++++++++++++++++++++++++++++++++-------------------------
 1 file changed, 61 insertions(+), 39 deletions(-)

(limited to 'mixer.c')

diff --git a/mixer.c b/mixer.c
index 1c187c82ca..6a3c54586c 100644
--- a/mixer.c
+++ b/mixer.c
@@ -1,4 +1,3 @@
-
 #include <string.h>
 #ifndef __MINGW32__
 #include <sys/ioctl.h>
@@ -8,82 +7,105 @@
 #include <unistd.h>
 
 #include "config.h"
-#include "mixer.h"
 #include "libao2/audio_out.h"
+#include "libaf/af.h"
+#include "mixer.h"
 
-extern ao_functions_t *audio_out;
+#include "help_mp.h"
 
 char * mixer_device=NULL;
 char * mixer_channel=NULL;
 
-int muted = 0;
-float mute_l = 0.0f;
-float mute_r = 0.0f;
-
-void mixer_getvolume( float *l,float *r )
+void mixer_getvolume(mixer_t *mixer, float *l, float *r)
 {
   ao_control_vol_t vol;
   *l=0; *r=0;
-  if(audio_out){
-    if(CONTROL_OK != audio_out->control(AOCONTROL_GET_VOLUME,&vol))
-      return;
+  if(mixer->audio_out){
+    if(CONTROL_OK != mixer->audio_out->control(AOCONTROL_GET_VOLUME,&vol)) {
+      if (!mixer->afilter)
+        return;
+      else {
+        float db_vals[AF_NCH];
+        if (!af_control_any_rev(mixer->afilter,
+               AF_CONTROL_VOLUME_LEVEL | AF_CONTROL_GET, db_vals))
+          return;
+        af_from_dB (2, db_vals, db_vals, 20.0, -200.0, 60.0);
+        vol.left = db_vals[0] * 90.0;
+        vol.right = db_vals[1] * 90.0;
+      }
+    }
     *r=vol.right;
     *l=vol.left;
   }
 }
 
-void mixer_setvolume( float l,float r )
+void mixer_setvolume(mixer_t *mixer, float l, float r)
 {
   ao_control_vol_t vol;
   vol.right=r; vol.left=l;
-  if(audio_out){
-    if(CONTROL_OK != audio_out->control(AOCONTROL_SET_VOLUME,&vol))
-      return;
+  if(mixer->audio_out){
+    if(CONTROL_OK != mixer->audio_out->control(AOCONTROL_SET_VOLUME,&vol)) {
+      if (mixer->afilter)
+        return;
+      else {
+        // af_volume uses values in dB
+        float db_vals[AF_NCH];
+        int i;
+        // a volume of 90% will give 0 dB (no change)
+        // like this, amplification is possible as well
+        db_vals[0] = l / 90.0;
+        db_vals[1] = r / 90.0;
+        for (i = 2; i < AF_NCH; i++) {
+          db_vals[i] = (l + r) / 180.0;
+        }
+        af_to_dB (AF_NCH, db_vals, db_vals, 20.0);
+        if (!af_control_any_rev(mixer->afilter,
+               AF_CONTROL_VOLUME_LEVEL | AF_CONTROL_SET, db_vals)) {
+          mp_msg(MSGT_GLOBAL, MSGL_HINT, MSGTR_NeedAfVolume);
+          return;
+	}
+      }
+    }
   }
- muted=0;
+ mixer->muted=0;
 }
 
-#define MIXER_CHANGE 3
-
-void mixer_incvolume( void )
+void mixer_incvolume(mixer_t *mixer)
 {
  float mixer_l, mixer_r;
- mixer_getvolume( &mixer_l,&mixer_r );
- mixer_l += MIXER_CHANGE;
+ mixer_getvolume(mixer, &mixer_l, &mixer_r);
+ mixer_l += mixer->volstep;
  if ( mixer_l > 100 ) mixer_l = 100;
- mixer_r += MIXER_CHANGE;
+ mixer_r += mixer->volstep;
  if ( mixer_r > 100 ) mixer_r = 100;
- mixer_setvolume( mixer_l,mixer_r );
+ mixer_setvolume(mixer, mixer_l, mixer_r);
 }
 
-void mixer_decvolume( void )
+void mixer_decvolume(mixer_t *mixer)
 {
  float mixer_l, mixer_r;
- mixer_getvolume( &mixer_l,&mixer_r );
- mixer_l -= MIXER_CHANGE;
+ mixer_getvolume(mixer, &mixer_l, &mixer_r);
+ mixer_l -= mixer->volstep;
  if ( mixer_l < 0 ) mixer_l = 0;
- mixer_r -= MIXER_CHANGE;
+ mixer_r -= mixer->volstep;
  if ( mixer_r < 0 ) mixer_r = 0;
- mixer_setvolume( mixer_l,mixer_r );
+ mixer_setvolume(mixer, mixer_l, mixer_r);
 }
 
-float mixer_getbothvolume( void )
+void mixer_getbothvolume(mixer_t *mixer, float *b)
 {
  float mixer_l, mixer_r;
- mixer_getvolume( &mixer_l,&mixer_r );
- return ( mixer_l + mixer_r ) / 2;
+ mixer_getvolume(mixer, &mixer_l, &mixer_r);
+ *b = ( mixer_l + mixer_r ) / 2;
 }
 
-void mixer_mute( void )
+void mixer_mute(mixer_t *mixer)
 {
- if ( muted ) mixer_setvolume( mute_l,mute_r );
+ if (mixer->muted) mixer_setvolume(mixer, mixer->last_l, mixer->last_r);
   else
    { 
-    mixer_getvolume( &mute_l,&mute_r );
-    mixer_setvolume( 0,0 );
-    muted=1;
+    mixer_getvolume(mixer, &mixer->last_l, &mixer->last_r);
+    mixer_setvolume(mixer, 0, 0);
+    mixer->muted=1;
    }
 }
-
-
-
-- 
cgit v1.2.3