comparison data/fft/FFTDataServer.cpp @ 154:6ec58bb8f729

* Suspend/resume fft data server write activity while reading from a server
  to repaint the spectrogram display.  Makes a significant improvement to
  the otherwise dreadful responsiveness of spectrogram display.

 #include "model/DenseTimeValueModel.h"
 
 #include "system/System.h"
 
 #define DEBUG_FFT_SERVER 1
-#define DEBUG_FFT_SERVER_FILL 1
+//#define DEBUG_FFT_SERVER_FILL 1
 
 #ifdef DEBUG_FFT_SERVER_FILL
 #ifndef DEBUG_FFT_SERVER
 #define DEBUG_FFT_SERVER 1
 #endif

 }
 
 void
 FFTDataServer::resume()
 {
+#ifdef DEBUG_FFT_SERVER
+    std::cerr << "FFTDataServer(" << this << "): resume" << std::endl;
+#endif
     m_suspended = false;
     m_condition.wakeAll();
 }
 
 FFTCache *

 bool
 FFTDataServer::isColumnReady(size_t x)
 {
     if (!haveCache(x)) {
         if (m_lastUsedCache == -1) {
+            if (m_suspended) resume();
             m_fillThread->start();
         }
         return false;
     }
 

 
     cache->setColumnAt(col,
                        m_workbuffer,
                        m_workbuffer + m_fftSize/2,
                        factor);
+
+    if (m_suspended) resume();
 }    
 
 size_t
 FFTDataServer::getFillCompletion() const 
 {