comparison audioio/AudioCallbackPlaySource.cpp @ 24:a0900900a6f6

* More structural work on feature extraction plugin C <-> C++ adapter
* Allow use of LADSPA/DSSI plugins with control outputs as feature extraction
  plugins (DSSI with MIDI output still to come)
* Reorder labels on spectrogram status box
* Minor tweaks in doc etc.

     }
     m_mutex.unlock();
 
     m_audioGenerator->reset();
 
+    bool changed = !m_playing;
     m_playing = true;
     m_condition.wakeAll();
-    emit playStatusChanged(m_playing);
+    if (changed) emit playStatusChanged(m_playing);
 }
 
 void
 AudioCallbackPlaySource::stop()
 {
+    bool changed = m_playing;
     m_playing = false;
     m_condition.wakeAll();
-    emit playStatusChanged(m_playing);
+    if (changed) emit playStatusChanged(m_playing);
 }
 
 void
 AudioCallbackPlaySource::selectionChanged()
 {

 	s.unifyRingBuffers();
 	s.m_bufferScavenger.scavenge();
 	s.m_timeStretcherScavenger.scavenge();
 
 	if (work && s.m_playing && s.getSourceSampleRate()) {
+	    
+#ifdef DEBUG_AUDIO_PLAY_SOURCE
+	    std::cout << "AudioCallbackPlaySourceFillThread: not waiting" << std::endl;
+#endif
 
 	    s.m_mutex.unlock();
 	    s.m_mutex.lock();
 
 	} else {