comparison data/fft/FFTDataServer.cpp @ 246:d7eeffbb8aaf

* Add fuzzy interpolation option as an alternative to zero padding in
  spectrogram (looks terrible though)
* Make spectrogram appear more quickly by having the FFT server notify of
  updates more often near the start of its run

     size_t start = m_server.m_model->getStartFrame();
     size_t end = m_server.m_model->getEndFrame();
     size_t remainingEnd = end;
 
     int counter = 0;
-    int updateAt = (end / m_server.m_windowIncrement) / 20;
-    if (updateAt < 100) updateAt = 100;
+    int updateAt = 1;
+    int maxUpdateAt = (end / m_server.m_windowIncrement) / 20;
+    if (maxUpdateAt < 100) maxUpdateAt = 100;
 
     if (m_fillFrom > start) {
 
         for (size_t f = m_fillFrom; f < end; f += m_server.m_windowIncrement) {
 	    

             if (++counter == updateAt) {
                 m_extent = f;
                 m_completion = size_t(100 * fabsf(float(f - m_fillFrom) /
                                                   float(end - start)));
                 counter = 0;
+                if (updateAt < maxUpdateAt) {
+                    updateAt *= 2;
+                    if (updateAt > maxUpdateAt) updateAt = maxUpdateAt;
+                }
             }
         }
 
         remainingEnd = m_fillFrom;
         if (remainingEnd > start) --remainingEnd;

             m_extent = f;
             m_completion = baseCompletion +
                 size_t(100 * fabsf(float(f - start) /
                                    float(end - start)));
             counter = 0;
+            if (updateAt < maxUpdateAt) {
+                updateAt *= 2;
+                if (updateAt > maxUpdateAt) updateAt = maxUpdateAt;
+            }
         }
     }
 
     m_completion = 100;
     m_extent = end;