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stk::Whistle Class Reference

STK police/referee whistle instrument class. More...

#include <Whistle.h>

Inheritance diagram for stk::Whistle:
stk::Instrmnt stk::Stk

List of all members.

Public Member Functions

 Whistle (void)
 Class constructor.
 ~Whistle (void)
 Class destructor.
void clear (void)
 Reset and clear all internal state.
void setFrequency (StkFloat frequency)
 Set instrument parameters for a particular frequency.
void startBlowing (StkFloat amplitude, StkFloat rate)
 Apply breath velocity to instrument with given amplitude and rate of increase.
void stopBlowing (StkFloat rate)
 Decrease breath velocity with given rate of decrease.
void noteOn (StkFloat frequency, StkFloat amplitude)
 Start a note with the given frequency and amplitude.
void noteOff (StkFloat amplitude)
 Stop a note with the given amplitude (speed of decay).
void controlChange (int number, StkFloat value)
 Perform the control change specified by number and value (0.0 - 128.0).
StkFloat tick (unsigned int channel=0)
 Compute and return one output sample.
StkFramestick (StkFrames &frames, unsigned int channel=0)
 Fill a channel of the StkFrames object with computed outputs.

Detailed Description

STK police/referee whistle instrument class.

This class implements a hybrid physical/spectral model of a police whistle (a la Cook).

Control Change Numbers:

by Perry R. Cook 1995-2012.


Constructor & Destructor Documentation

stk::Whistle::Whistle ( void   ) 

Class constructor.

An StkError will be thrown if the rawwave path is incorrectly set.


Member Function Documentation

StkFrames & stk::Whistle::tick ( StkFrames frames,
unsigned int  channel = 0 
) [inline, virtual]

Fill a channel of the StkFrames object with computed outputs.

The channel argument must be less than the number of channels in the StkFrames argument (the first channel is specified by 0). However, range checking is only performed if _STK_DEBUG_ is defined during compilation, in which case an out-of-range value will trigger an StkError exception.

Implements stk::Instrmnt.

00101 {
00102   unsigned int nChannels = lastFrame_.channels();
00103 #if defined(_STK_DEBUG_)
00104   if ( channel > frames.channels() - nChannels ) {
00105     oStream_ << "Whistle::tick(): channel and StkFrames arguments are incompatible!";
00106     handleError( StkError::FUNCTION_ARGUMENT );
00107   }
00108 #endif
00109 
00110   StkFloat *samples = &frames[channel];
00111   unsigned int j, hop = frames.channels() - nChannels;
00112   if ( nChannels == 1 ) {
00113     for ( unsigned int i=0; i<frames.frames(); i++, samples += hop )
00114       *samples++ = tick();
00115   }
00116   else {
00117     for ( unsigned int i=0; i<frames.frames(); i++, samples += hop ) {
00118       *samples++ = tick();
00119       for ( j=1; j<nChannels; j++ )
00120         *samples++ = lastFrame_[j];
00121     }
00122   }
00123 
00124   return frames;
00125 }


The documentation for this class was generated from the following file:

The Synthesis ToolKit in C++ (STK)
©1995-2012 Perry R. Cook and Gary P. Scavone. All Rights Reserved.