# HG changeset patch
# User Chris Cannam
# Date 1183388221 0
# Node ID bbe57afe9d7dc7c96d322c1b8588ebe15d281715
# Parent  b9380f679f70a462edf3f6178db12cb88955f46a
* avoid trying to calculate fft from incomplete decoded audio file in spectrum

diff -r b9380f679f70 -r bbe57afe9d7d layer/SpectrumLayer.cpp
--- a/layer/SpectrumLayer.cpp	Mon Jul 02 13:04:17 2007 +0000
+++ b/layer/SpectrumLayer.cpp	Mon Jul 02 14:57:01 2007 +0000
@@ -31,7 +31,8 @@
     m_channelSet(false),
     m_windowSize(1024),
     m_windowType(HanningWindow),
-    m_windowHopLevel(2)
+    m_windowHopLevel(2),
+    m_newFFTNeeded(true)
 {
     Preferences *prefs = Preferences::getInstance();
     connect(prefs, SIGNAL(propertyChanged(PropertyContainer::PropertyName)),
@@ -52,7 +53,7 @@
 {
     if (m_originModel == model) return;
     m_originModel = model;
-    setupFFT();
+//!!!    setupFFT();
 }
 
 void
@@ -99,7 +100,7 @@
 
     m_channel = channel;
 
-    if (!fft) setupFFT();
+//!!!    if (!fft) setupFFT();
 
     emit layerParametersChanged();
 }
@@ -218,7 +219,8 @@
 {
     if (m_windowSize == ws) return;
     m_windowSize = ws;
-    setupFFT();
+//!!!    setupFFT();
+    m_newFFTNeeded = true;
     emit layerParametersChanged();
 }
 
@@ -227,7 +229,8 @@
 {
     if (m_windowHopLevel == v) return;
     m_windowHopLevel = v;
-    setupFFT();
+//!!!    setupFFT();
+    m_newFFTNeeded = true;
     emit layerParametersChanged();
 }
 
@@ -236,7 +239,8 @@
 {
     if (m_windowType == w) return;
     m_windowType = w;
-    setupFFT();
+//!!!    setupFFT();
+    m_newFFTNeeded = true;
     emit layerParametersChanged();
 }
 
@@ -536,6 +540,20 @@
 }
 
 void
+SpectrumLayer::paint(View *v, QPainter &paint, QRect rect) const
+{
+    if (!m_originModel || !m_originModel->isOK() ||
+        !m_originModel->isReady()) return;
+
+    if (m_newFFTNeeded) {
+        const_cast<SpectrumLayer *>(this)->setupFFT(); //ugh
+        m_newFFTNeeded = false;
+    }
+    
+    SliceLayer::paint(v, paint, rect);
+}
+
+void
 SpectrumLayer::getBiasCurve(BiasCurve &curve) const
 {
     curve = m_biasCurve;
diff -r b9380f679f70 -r bbe57afe9d7d layer/SpectrumLayer.h
--- a/layer/SpectrumLayer.h	Mon Jul 02 13:04:17 2007 +0000
+++ b/layer/SpectrumLayer.h	Mon Jul 02 14:57:01 2007 +0000
@@ -44,6 +44,8 @@
 
     virtual QString getFeatureDescription(View *v, QPoint &) const;
 
+    virtual void paint(View *v, QPainter &paint, QRect rect) const;
+
     virtual PropertyList getProperties() const;
     virtual QString getPropertyLabel(const PropertyName &) const;
     virtual PropertyType getPropertyType(const PropertyName &) const;
@@ -100,6 +102,7 @@
     size_t                  m_windowSize;
     WindowType              m_windowType;
     size_t                  m_windowHopLevel;
+    mutable bool            m_newFFTNeeded;
 
     void setupFFT();