From e360047054117d63fb579ec9231e9dc77c99f12a Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Fri, 8 Aug 2008 22:45:58 +0000
Subject: Add preliminary (library side only) LV2 port of MDA (open-sourced VST
 plugins).

git-svn-id: http://svn.drobilla.net/lad/mda-lv2@1321 a436a847-0d15-0410-975c-d299462d15a1
---
 src/mdaSpecMeterGUI.cpp | 179 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 179 insertions(+)
 create mode 100644 src/mdaSpecMeterGUI.cpp

(limited to 'src/mdaSpecMeterGUI.cpp')

diff --git a/src/mdaSpecMeterGUI.cpp b/src/mdaSpecMeterGUI.cpp
new file mode 100644
index 0000000..08bc5a3
--- /dev/null
+++ b/src/mdaSpecMeterGUI.cpp
@@ -0,0 +1,179 @@
+#include "mdaSpecMeterGUI.h"
+#include "mdaSpecMeter.h"
+
+#include <math.h>
+
+
+mdaSpecMeterGUI::mdaSpecMeterGUI(AudioEffect *effect) : AEffGUIEditor(effect)
+{
+  background = new CBitmap(128);
+
+  rect.left   = 0;
+  rect.top    = 0;
+  rect.right  = (LvzInt16)background->getWidth();
+  rect.bottom = (LvzInt16)background->getHeight();
+}
+
+
+mdaSpecMeterGUI::~mdaSpecMeterGUI()
+{
+  delete background;
+}
+
+
+bool mdaSpecMeterGUI::open(void *ptr)
+{
+  AEffGUIEditor::open(ptr);
+
+  CPoint offs(0, 0);
+  CRect  size(0, 0, background->getWidth(), background->getHeight());
+  frame = new CFrame(size, ptr, this);
+
+	size.offset(0, 0);
+	draw = new CDraw(size, 0.0f, background);
+	frame->addView(draw);
+
+  return true;
+}
+
+
+void mdaSpecMeterGUI::close()
+{
+  delete frame;
+  frame = 0;
+}
+
+
+void mdaSpecMeterGUI::idle()
+{
+	long xnow = ((mdaSpecMeter *)effect)->counter;
+	if(xnow != xtimer)
+	{
+	  xtimer = xnow;
+	  
+    //if(draw) temp = draw->temp;
+	  //if(label) label->setLabel(xtimer);
+	  
+	  if(draw) //copy data from effect (this can't be the best way!)
+	  {
+	    draw->Lpeak = ((mdaSpecMeter *)effect)->Lpeak;
+	    draw->Lmin  = ((mdaSpecMeter *)effect)->Lmin;
+	    draw->Lrms  = ((mdaSpecMeter *)effect)->Lrms;
+	    draw->Rpeak = ((mdaSpecMeter *)effect)->Rpeak;
+	    draw->Rmin  = ((mdaSpecMeter *)effect)->Rmin;
+	    draw->Rrms  = ((mdaSpecMeter *)effect)->Rrms;
+	    draw->Corr  = ((mdaSpecMeter *)effect)->Corr;
+      for(long i=0; i<13; i++)
+      {
+        draw->band[0][i] = ((mdaSpecMeter *)effect)->band[0][i];
+        draw->band[1][i] = ((mdaSpecMeter *)effect)->band[1][i];
+      }
+      draw->setDirty(true); //trigger redraw
+    }
+	}
+
+  AEffGUIEditor::idle();
+}
+
+
+CDraw::CDraw(CRect &size, float value, CBitmap *background) : CControl(size)
+{
+  bitmap = background;
+  
+  Lpeak = Lmin = Lrms = Rpeak = Rmin = Rrms = Corr = 0.0f;
+  for(long i=0; i<16; i++) band[0][i] = band[1][i] = 0.0f;
+  
+  setValue(value);
+}
+
+CDraw::~CDraw()
+{
+
+}
+
+void CDraw::draw(CDrawContext *pContext)
+{
+  long r, p;
+  CRect block;
+  CRect rect(0, 0, bitmap->getWidth(), bitmap->getHeight());
+
+  bitmap->draw(pContext, rect);
+/*
+  pContext->setFillColor(kGreenCColor);
+
+  p = x2pix(Lmin);
+  block(p - 3, 10, p - 1, 18);
+  pContext->fillRect(block);
+
+  p = x2pix(Rmin);
+  block(p - 3, 18, p - 1, 26);
+  pContext->fillRect(block);
+*/
+  pContext->setFillColor(kBlackCColor);
+
+  r = x22pix(Lrms);  if(r > 454) r = 454;
+  p = x2pix(Lpeak);  if(p > 454) p = 454;
+  block = CRect(r - 1, 10, p - 1, 18);
+  pContext->fillRect(block);
+  block = CRect(p - 1, 10, 478, 18);
+  if(p < 454) pContext->fillRect(block);
+
+  r = x22pix(Rrms);  if(r > 454) r = 454;
+  p = x2pix(Rpeak);  if(p > 454) p = 454;
+  block = CRect(r - 1, 18, p - 1, 26);
+  pContext->fillRect(block);
+  block = CRect(p - 1, 18, 478, 26);
+  if(p < 454) pContext->fillRect(block);
+
+  //block(x2pix(Rpeak), 18, 478, 26);
+  //buf->fillRect(block);
+
+  block = CRect(235, 42, 244, 134 - (long)(90 * Corr));
+  pContext->fillRect(block);
+
+  long i, x1=2, x2=256; //octave bands
+  float dB;
+  for(i=0; i<13; i++)
+  {
+    dB = band[0][i];
+    block = CRect(x1, 42, x1+18, 49 - (long)(20.0 * log(dB)));
+    pContext->fillRect(block);
+    x1 += 17;
+
+    dB = band[1][i];
+    block = CRect(x2, 42, x2+18, 49 - (long)(20.0 * log(dB)));
+    pContext->fillRect(block);
+    x2 += 17;
+  }
+}
+
+
+long CDraw::x2pix(float x)
+{
+  float dB = x;
+  long p = 478;
+  
+  if(x > 0.00000005f) dB = 8.6858896f * (float)log(x); else dB = -146.0f;
+  if(dB < -20.0) 
+    p = 293 + (long)(2.0f * dB); 
+  else 
+    p = 453 + (long)(10.0f * dB);
+  
+  return p;
+}
+
+
+long CDraw::x22pix(float x) //power version for squared summed
+{
+  float dB = x;
+  long p = 478;
+  
+  if(x > 0.00000005f) dB = 4.3429448f * (float)log(x); else dB = -146.0f;
+  if(dB < -20.0) 
+    p = 293 + (long)(2.0f * dB); 
+  else 
+    if(dB < 0.0f) p = 453 + (long)(10.0f * dB);
+  
+  return p;
+}
+
-- 
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