comparison audioio/AudioCallbackPlaySource.h @ 32:e3b32dc5180b

* Make resampler quality configurable
* Fall back to linear resampling when playing very fast
* Switch off transient detection in time stretcher when playing very very fast

 #ifndef _AUDIO_CALLBACK_PLAY_SOURCE_H_
 #define _AUDIO_CALLBACK_PLAY_SOURCE_H_
 
 #include "base/RingBuffer.h"
 #include "base/AudioPlaySource.h"
+#include "base/PropertyContainer.h"
 #include "base/Scavenger.h"
 
 #include <QObject>
 #include <QMutex>
 #include <QWaitCondition>

      * audio data, in all channels.  This may safely be called from a
      * realtime thread.
      */
     size_t getSourceSamples(size_t count, float **buffer);
 
+    /**
+     * Set the time stretcher factor (i.e. playback speed).  Also
+     * specify whether the time stretcher will be variable rate
+     * (sharpening transients), and whether time stretching will be
+     * carried out on data mixed down to mono for speed.
+     */
     void setTimeStretch(float factor, bool sharpen, bool mono);
+
+    /**
+     * Set the resampler quality, 0 - 2 where 0 is fastest and 2 is
+     * highest quality.
+     */
+    void setResampleQuality(int q);
 
 signals:
     void modelReplaced();
 
     void playStatusChanged(bool isPlaying);

 protected slots:
     void selectionChanged();
     void playLoopModeChanged();
     void playSelectionModeChanged();
     void playParametersChanged(PlayParameters *);
+    void preferenceChanged(PropertyContainer::PropertyName);
 
 protected:
     ViewManager                     *m_viewManager;
     AudioGenerator                  *m_audioGenerator;
 

 
     QMutex m_mutex;
     QWaitCondition m_condition;
     AudioCallbackPlaySourceFillThread *m_fillThread;
     SRC_STATE *m_converter;
+    SRC_STATE *m_crapConverter; // for use when playing very fast
+    int m_resampleQuality;
+    void initialiseConverter();
 };
 
 #endif