Mixer: Fix -3db error in meter display.

mixer/src/DPM.C

@@ -131,6 +131,8 @@ DPM::draw ( void )
     int v = pos( value() );
     int pv = pos( peak() );
 
+    int clipv = pos( 0 );
+
     int bh = h() / _segments;
     int bw = w() / _segments;
 
@@ -172,11 +174,15 @@ DPM::draw ( void )
 
     for ( int p = lo; p <= hi; p++ )
     {
-        Fl_Color c = DPM::div_color( p );
+        Fl_Color c;
 
         if ( p > v && p != pv )
             c = dim_div_color( p );
-
+        else if ( p != clipv )
+            c = div_color( p );
+        else
+            c = fl_color_average( FL_YELLOW, div_color( p ), 0.40 );
+        
         if ( ! active )
             c = fl_inactive( c );
 

mixer/src/Meter_Module.C

@@ -192,11 +192,7 @@ get_peak_sample ( const sample_t* buf, nframes_t nframes )
 
     for ( int j = nframes; j--; ++f )
     {
-        float s = *f;
-
-        /* rectify */
-        if ( s < 0.0f )
-            s = 0 - s;
+        const float s = fabs( *f );
 
         if ( s > p )
             p = s;
@@ -212,7 +208,8 @@ Meter_Module::process ( nframes_t nframes )
     {
         if ( audio_input[i].connected() )
         {
-            float dB = 20 * log10( get_peak_sample( (float*)audio_input[i].buffer(), nframes ) / 2.0f );
+//            float dB = 20 * log10( get_peak_sample( (float*)audio_input[i].buffer(), nframes ) / 2.0f );
+            float dB = 20 * log10( get_peak_sample( (float*)audio_input[i].buffer(), nframes ) );
 
             ((float*)control_output[0].buffer())[i] = dB;
             control_value[i] = dB;