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Version 4.4.0

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This commit is contained in:
Gary Scavone
2013-09-29 23:11:39 +02:00
committed by Stephen Sinclair
parent d199342e86
commit eccd8c9981
287 changed files with 11712 additions and 7676 deletions
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58
src/SineWave.cpp
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@@ -9,13 +9,15 @@
The "table" length, set in SineWave.h, is 2048 samples by default.
by Perry R. Cook and Gary P. Scavone, 1995 - 2007.
by Perry R. Cook and Gary P. Scavone, 1995 - 2009.
*/
/***************************************************/
#include "SineWave.h"
#include <cmath>
namespace stk {
StkFrames SineWave :: table_;
SineWave :: SineWave( void )
@@ -42,10 +44,10 @@ void SineWave :: sampleRateChanged( StkFloat newRate, StkFloat oldRate )
this->setRate( oldRate * rate_ / newRate );
}
void SineWave :: reset(void)
void SineWave :: reset( void )
{
time_ = 0.0;
lastOutput_ = 0;
lastFrame_[0] = 0;
}
void SineWave :: setFrequency( StkFloat frequency )
@@ -58,55 +60,19 @@ void SineWave :: addTime( StkFloat time )
{
// Add an absolute time in samples.
time_ += time;
while ( time_ < 0.0 )
time_ += TABLE_SIZE;
while ( time_ >= TABLE_SIZE )
time_ -= TABLE_SIZE;
}
void SineWave :: addPhase( StkFloat angle )
void SineWave :: addPhase( StkFloat phase )
{
// Add a time in cycles (one cycle = TABLE_SIZE).
time_ += TABLE_SIZE * angle;
while ( time_ < 0.0 )
time_ += TABLE_SIZE;
while ( time_ >= TABLE_SIZE )
time_ -= TABLE_SIZE;
time_ += TABLE_SIZE * phase;
}
void SineWave :: addPhaseOffset( StkFloat angle )
void SineWave :: addPhaseOffset( StkFloat phaseOffset )
{
// Add a phase offset in cycles, where 1.0 = TABLE_SIZE.
phaseOffset_ = TABLE_SIZE * angle;
// Add a phase offset relative to any previous offset value.
time_ += ( phaseOffset - phaseOffset_ ) * TABLE_SIZE;
phaseOffset_ = phaseOffset;
}
StkFloat SineWave :: computeSample( void )
{
// Check limits of time address ... if necessary, recalculate modulo
// TABLE_SIZE.
while ( time_ < 0.0 )
time_ += TABLE_SIZE;
while ( time_ >= TABLE_SIZE )
time_ -= TABLE_SIZE;
StkFloat tyme;
if ( phaseOffset_ ) {
tyme = time_ + phaseOffset_;
while ( tyme < 0.0 )
tyme += TABLE_SIZE;
while ( tyme >= TABLE_SIZE )
tyme -= TABLE_SIZE;
}
else {
tyme = time_;
}
lastOutput_ = table_.interpolate( tyme );
// Increment time, which can be negative.
time_ += rate_;
return lastOutput_;
}
} // stk namespace