From f2bdcbb402e42998635102e01645d8f075a38c23 Mon Sep 17 00:00:00 2001
From: Jonathan Moore Liles <j.liles@unix.net>
Date: Fri, 14 Mar 2008 00:37:31 -0500
Subject: [PATCH] Add logarithmic option

---
 Waveform.C | 7 +++++++
 Waveform.H | 1 +
 2 files changed, 8 insertions(+)

diff --git a/Waveform.C b/Waveform.C
index 50a43f4..66af80a 100644
--- a/Waveform.C
+++ b/Waveform.C
@@ -34,6 +34,7 @@
 bool Waveform::fill = true;
 bool Waveform::outline = true;
 bool Waveform::vary_color = true;
+bool Waveform::logarithmic = true;
 
 /* TODO: split the variations into separate functions. eg, plain,
  * outlined, filled, polygonal, rectified. */
@@ -68,6 +69,12 @@ Waveform::draw ( int ox, int X, int Y, int W, int H, Audio_File *_clip, int chan
             p.max *= _scale;
             p.min *= _scale;
 
+            if ( Waveform::logarithmic )
+            {
+                p.max = 10.0f * log10f( p.max );
+                p.min = 10.0f * log10f( p.min );
+            }
+
             const float diff = fabs( p.max - p.min );
 
             if ( diff > 2.0f )
diff --git a/Waveform.H b/Waveform.H
index b29bfd3..08cfd65 100644
--- a/Waveform.H
+++ b/Waveform.H
@@ -34,6 +34,7 @@ public:
     static bool fill;
     static bool outline;
     static bool vary_color;
+    static bool logarithmic;
 
     static void draw ( int rx, int X, int Y, int W, int H, Audio_File *_clip, int channel, float fpp, nframes_t _start, nframes_t _end, float _scale, Fl_Color color );