Version 4.2.1

include/SineWave.h

@@ -0,0 +1,80 @@
+/***************************************************/
+/*! \class SineWave
+    \brief STK sinusoid oscillator class.
+
+    This class computes and saves a static sine "table" that can be
+    shared by multiple instances.  It has an interface similar to the
+    WaveLoop class but inherits from the Generator class.  Output
+    values are computed using linear interpolation.
+
+    The "table" length, set in SineWave.h, is 2048 samples by default.
+
+    by Perry R. Cook and Gary P. Scavone, 1995 - 2005.
+*/
+/***************************************************/
+
+#ifndef STK_SINEWAVE_H
+#define STK_SINEWAVE_H
+
+const unsigned long TABLE_SIZE = 2048;
+
+#include "Generator.h"
+
+class SineWave : public Generator
+{
+public:
+  //! Default constructor.
+  SineWave( void );
+
+  //! Class destructor.
+  virtual ~SineWave( void );
+
+  //! Clear output and reset time pointer to zero.
+  void reset( void );
+
+  //! Set the data read rate in samples.  The rate can be negative.
+  /*!
+    If the rate value is negative, the data is read in reverse order.
+  */
+  void setRate( StkFloat rate ) { rate_ = rate; };
+
+  //! Set the data interpolation rate based on a looping frequency.
+  /*!
+    This function determines the interpolation rate based on the file
+    size and the current Stk::sampleRate.  The \e frequency value
+    corresponds to file cycles per second.  The frequency can be
+    negative, in which case the loop is read in reverse order.
+   */
+  void setFrequency( StkFloat frequency );
+
+  //! Increment the read pointer by \e time samples, modulo file size.
+  void addTime( StkFloat time );
+
+  //! Increment current read pointer by \e angle, relative to a looping frequency.
+  /*!
+    This function increments the read pointer based on the file
+    size and the current Stk::sampleRate.  The \e anAngle value
+    is a multiple of file size.
+   */
+  void addPhase( StkFloat angle );
+
+  //! Add a phase offset to the current read pointer.
+  /*!
+    This function determines a time offset based on the file
+    size and the current Stk::sampleRate.  The \e angle value
+    is a multiple of file size.
+   */
+  void addPhaseOffset( StkFloat angle );
+
+protected:
+
+  StkFloat computeSample( void );
+
+  static StkFrames table_;
+  StkFloat time_;
+  StkFloat rate_;
+  StkFloat phaseOffset_;
+
+};
+
+#endif