diff base/FFTCache.cpp @ 128:f47f4c7c158c

* Add FFT data server class to provide a file cache mapping for each
  required set of FFT parameters and source model. Make use of it in
  feature extraction plugin transform, though not in other places yet.

* Add zero-pad option to spectrogram layer and remove window shape option
  from the property box.  To be revised.

--- a/base/FFTCache.cpp	Mon Jun 26 16:08:01 2006 +0000
+++ b/base/FFTCache.cpp	Mon Jun 26 16:12:11 2006 +0000
@@ -99,3 +99,20 @@
     }
 }	    
 
+void
+FFTMemoryCache::setColumnAt(size_t x, float *reals, float *imags)
+{
+    float max = 0.0;
+
+    for (size_t y = 0; y < m_height; ++y) {
+        float mag = sqrtf(reals[y] * reals[y] + imags[y] * imags[y]);
+        float phase = atan2f(imags[y], reals[y]);
+        phase = princargf(phase);
+        reals[y] = mag;
+        imags[y] = phase;
+        if (mag > max) max = mag;
+    }
+
+    setColumnAt(x, reals, imags, max);
+}
+