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Version 4.4.3

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This commit is contained in:
Gary Scavone
2013-09-29 23:21:29 +02:00
committed by Stephen Sinclair
parent baca57040b
commit 0aec39260a
223 changed files with 26190 additions and 11130 deletions
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69
include/Bowed.h
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@@ -28,9 +28,12 @@ namespace stk {
- Bow Position = 4
- Vibrato Frequency = 11
- Vibrato Gain = 1
- Bow Velocity = 100
- Frequency = 101
- Volume = 128
by Perry R. Cook and Gary P. Scavone, 1995 - 2010.
by Perry R. Cook and Gary P. Scavone, 1995-2011.
Contributions by Esteban Maestre, 2011.
*/
/***************************************************/
@@ -38,7 +41,7 @@ class Bowed : public Instrmnt
{
public:
//! Class constructor, taking the lowest desired playing frequency.
Bowed( StkFloat lowestFrequency );
Bowed( StkFloat lowestFrequency = 8.0 );
//! Class destructor.
~Bowed( void );
@@ -50,7 +53,7 @@ class Bowed : public Instrmnt
void setFrequency( StkFloat frequency );
//! Set vibrato gain.
void setVibrato( StkFloat gain );
void setVibrato( StkFloat gain ) { vibratoGain_ = gain; };
//! Apply breath pressure to instrument with given amplitude and rate of increase.
void startBowing( StkFloat amplitude, StkFloat rate );
@@ -70,15 +73,27 @@ class Bowed : public Instrmnt
//! Compute and return one output sample.
StkFloat tick( unsigned int channel = 0 );
//! Fill a channel of the StkFrames object with computed outputs.
/*!
The \c 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.
*/
StkFrames& tick( StkFrames& frames, unsigned int channel = 0 );
protected:
DelayL neckDelay_;
DelayL bridgeDelay_;
BowTable bowTable_;
OnePole stringFilter_;
BiQuad bodyFilter_;
BiQuad bodyFilters_[6];
SineWave vibrato_;
ADSR adsr_;
bool bowDown_;
StkFloat maxVelocity_;
StkFloat baseDelay_;
StkFloat vibratoGain_;
@@ -89,24 +104,54 @@ class Bowed : public Instrmnt
inline StkFloat Bowed :: tick( unsigned int )
{
StkFloat bowVelocity = maxVelocity_ * adsr_.tick();
StkFloat bridgeRefl = -stringFilter_.tick( bridgeDelay_.lastOut() );
StkFloat nutRefl = -neckDelay_.lastOut();
StkFloat stringVel = bridgeRefl + nutRefl; // Sum is string velocity
StkFloat velDiff = bowVelocity - stringVel; // Differential velocity
StkFloat newVel = velDiff * bowTable_.tick( velDiff ); // Non-Linear bow function
neckDelay_.tick(bridgeRefl + newVel); // Do string propagations
bridgeDelay_.tick(nutRefl + newVel);
StkFloat bridgeReflection = -stringFilter_.tick( bridgeDelay_.lastOut() );
StkFloat nutReflection = -neckDelay_.lastOut();
StkFloat stringVelocity = bridgeReflection + nutReflection;
StkFloat deltaV = bowVelocity - stringVelocity; // Differential velocity
StkFloat newVelocity = 0.0;
if ( bowDown_ )
newVelocity = deltaV * bowTable_.tick( deltaV ); // Non-Linear bow function
neckDelay_.tick( bridgeReflection + newVelocity); // Do string propagations
bridgeDelay_.tick(nutReflection + newVelocity);
if ( vibratoGain_ > 0.0 ) {
neckDelay_.setDelay( (baseDelay_ * (1.0 - betaRatio_) ) +
(baseDelay_ * vibratoGain_ * vibrato_.tick()) );
}
lastFrame_[0] = bodyFilter_.tick( bridgeDelay_.lastOut() );
lastFrame_[0] = 0.1248 * bodyFilters_[5].tick( bodyFilters_[4].tick( bodyFilters_[3].tick( bodyFilters_[2].tick( bodyFilters_[1].tick( bodyFilters_[0].tick( bridgeDelay_.lastOut() ) ) ) ) ) );
return lastFrame_[0];
}
inline StkFrames& Bowed :: tick( StkFrames& frames, unsigned int channel )
{
unsigned int nChannels = lastFrame_.channels();
#if defined(_STK_DEBUG_)
if ( channel > frames.channels() - nChannels ) {
oStream_ << "Bowed::tick(): channel and StkFrames arguments are incompatible!";
handleError( StkError::FUNCTION_ARGUMENT );
}
#endif
StkFloat *samples = &frames[channel];
unsigned int j, hop = frames.channels() - nChannels;
if ( nChannels == 1 ) {
for ( unsigned int i=0; i<frames.frames(); i++, samples += hop )
*samples++ = tick();
}
else {
for ( unsigned int i=0; i<frames.frames(); i++, samples += hop ) {
*samples++ = tick();
for ( j=1; j<nChannels; j++ )
*samples++ = lastFrame_[j];
}
}
return frames;
}
} // stk namespace
#endif