void SynthEvent::setFrequency( float aFrequency, bool allOscillators, bool storeAsBaseFrequency )
{
_frequency = aFrequency;
_phaseIncr = aFrequency / AudioEngineProps::SAMPLE_RATE;
// store as base frequency (acts as a reference "return point" for pitch shifting modules)
if ( storeAsBaseFrequency )
_baseFrequency = aFrequency;
if ( _type == WaveForms::KARPLUS_STRONG )
initKarplusStrong();
// update properties of secondary oscillator, note that OSC2 can
// have a pitch that deviates from the first oscillator
// as such we multiply it by the deviation of the new frequency
if ( allOscillators && _osc2 != 0 )
{
//float multiplier = aFrequency / currentFreq;
//_osc2->setFrequency( _osc2->_frequency * multiplier, true, storeAsBaseFrequency );
createOSC2( position, length, _instrument );
}
}
void SynthEvent::setFrequency( float aFrequency, bool allOscillators, bool storeAsBaseFrequency )
{
float currentFreq = _frequency;
_frequency = aFrequency;
//_phase = 0.0f; // will create nasty pop if another freq was playing previously
_phaseIncr = aFrequency / AudioEngineProps::SAMPLE_RATE;
// store as base frequency (acts as a reference "return point" for pitch shifting modules)
if ( storeAsBaseFrequency )
_baseFrequency = aFrequency;
if ( /*!isSequenced &&*/ _type == WaveForms::KARPLUS_STRONG )
initKarplusStrong();
// update properties of secondary oscillator, note that OSC2 can
// have a pitch that deviates from the first oscillator
// as such we multiply it by the deviation of the new frequency
if ( allOscillators && _osc2 != 0 )
{
float multiplier = aFrequency / currentFreq;
_osc2->setFrequency( _osc2->_frequency * multiplier, true, storeAsBaseFrequency );
}
}
void SynthEvent::calculateBuffers()
{
// we override the entire function body as we need some
// oscillator 2-specific operations in here
if ( _locked )
{
_updateAfterUnlock = true;
return;
}
int oldLength;
if ( isSequenced )
{
_cancel = true;
oldLength = _sampleLength;
_sampleLength = ( int )( length * ( float ) AudioEngine::bytes_per_tick );
_sampleStart = position * AudioEngine::bytes_per_tick;
_sampleEnd = _sampleStart + _sampleLength;
}
else {
// quick releases of a noteOn-instruction should ring for at least a 64th note
_minLength = AudioEngine::bytes_per_bar / 64;
_sampleLength = AudioEngine::bytes_per_bar; // important for amplitude swell in
oldLength = AudioEngineProps::BUFFER_SIZE; // buffer is as long as the engine's buffer size
_hasMinLength = false; // keeping track if the min length has been rendered
}
_adsr->setBufferLength( _sampleLength );
// sample length changed (f.i. tempo change) or buffer not yet created ? create buffer for (new) length
if ( _sampleLength != oldLength )
{
if ( !hasParent ) // OSC2 generates no buffer (writes into parent buffer, saves memory)
{
// note that when event caching is enabled, the buffer is as large as
// the total event length requires
if ( AudioEngineProps::EVENT_CACHING && isSequenced )
{
destroyBuffer(); // clear previous buffer contents
_buffer = new AudioBuffer( AudioEngineProps::OUTPUT_CHANNELS, _sampleLength );
}
else
_buffer = new AudioBuffer( AudioEngineProps::OUTPUT_CHANNELS, AudioEngineProps::BUFFER_SIZE );
// though this event manages its child oscillator, the render method needs these properties
if ( _osc2 != 0 ) {
_osc2->_sampleLength = _sampleLength;
_osc2->_sampleStart = _sampleStart;
_osc2->_sampleEnd = _sampleEnd;
}
}
}
if ( isSequenced )
{
if ( _type == WaveForms::KARPLUS_STRONG )
initKarplusStrong();
if ( AudioEngineProps::EVENT_CACHING )
{
resetCache(); // yes here, not in cache()-invocation as cancels might otherwise remain permanent (see BulkCacher)
if ( _autoCache && !_caching ) // re-cache
cache( false );
}
}
}
void SynthEvent::calculateBuffers()
{
if ( _locked )
{
_updateAfterUnlock = true;
return;
}
int oldLength;
if ( isSequenced )
{
if ( _caching )
_cancel = true;
oldLength = _sampleLength;
_sampleLength = ( int )( length * ( float ) AudioEngine::bytes_per_tick );
_sampleStart = position * AudioEngine::bytes_per_tick;
_sampleEnd = _sampleStart + _sampleLength;
}
else {
// quick releases of the key should at least ring for a 32nd note
_minLength = AudioEngine::bytes_per_bar / 32;
_sampleLength = AudioEngine::bytes_per_bar; // important for amplitude swell in
oldLength = AudioEngineProps::BUFFER_SIZE; // buffer is as long as the engine's buffer size
_hasMinLength = false; // keeping track if the min length has been rendered
}
_adsr->setBufferLength( _sampleLength );
// sample length changed (f.i. tempo change) or buffer not yet created ?
// create buffer for (new) sample length
if ( _sampleLength != oldLength || _buffer == 0 )
{
destroyBuffer(); // clear previous buffer contents
// OSC2 generates no buffer (writes into parent buffer, saves memory)
if ( !hasParent )
{
// note that when event caching is enabled, the buffer is as large as
// the total event length requires
if ( AudioEngineProps::EVENT_CACHING && isSequenced )
_buffer = new AudioBuffer( AudioEngineProps::OUTPUT_CHANNELS, _sampleLength );
else
_buffer = new AudioBuffer( AudioEngineProps::OUTPUT_CHANNELS, AudioEngineProps::BUFFER_SIZE );
}
}
if ( isSequenced )
{
if ( _type == WaveForms::KARPLUS_STRONG )
initKarplusStrong();
if ( AudioEngineProps::EVENT_CACHING )
{
resetCache(); // yes here, not in cache()-invocation as cancels might otherwise remain permanent (see BulkCacher)
// (re)cache (unless this event is OSC2 as only the parent event can invoke the render)
if ( _autoCache && !hasParent )
{
if ( !_caching )
cache( false );
else
_cancel = true;
}
}
}
}
