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first IPH-based 302

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git-svn-id: https://lmms.svn.sf.net/svnroot/lmms/trunk/lmms@1287 0778d3d1-df1d-0410-868b-ea421aaaa00d
This commit is contained in:
Paul Giblock
2008-07-07 00:24:06 +00:00
parent 3a9b02fbe4
commit f93205469c
3 changed files with 133 additions and 276 deletions
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329
plugins/lb302/lb302.cpp
View File

@@ -192,28 +192,6 @@ float lb302FilterIIR2::process(const float& samp)
}
void lb302FilterIIR2::getState(lb302FilterState* fs)
{
fs->iir.vcf_c0 = vcf_c0;
fs->iir.vcf_a = vcf_a;
fs->iir.vcf_b = vcf_b;
fs->iir.vcf_c = vcf_c;
fs->iir.vcf_d1 = vcf_d1;
fs->iir.vcf_d2 = vcf_d2;
}
void lb302FilterIIR2::setState(const lb302FilterState* fs)
{
vcf_c0 = fs->iir.vcf_c0;
vcf_a = fs->iir.vcf_a;
vcf_b = fs->iir.vcf_b;
vcf_c = fs->iir.vcf_c;
vcf_d1 = fs->iir.vcf_d1;
vcf_d2 = fs->iir.vcf_d2;
}
//
// lb302Filter3Pole
//
@@ -286,34 +264,6 @@ float lb302Filter3Pole::process(const float& samp)
}
void lb302Filter3Pole::getState(lb302FilterState* fs)
{
fs->pole.aout = aout;
fs->pole.vcf_c0 = vcf_c0;
fs->pole.kp = kp;
fs->pole.kp1h = kp1h;
fs->pole.kres = kres;
fs->pole.ay1 = ay1;
fs->pole.ay2 = ay2;
fs->pole.lastin = lastin;
fs->pole.value = value;
}
void lb302Filter3Pole::setState(const lb302FilterState* fs)
{
aout = fs->pole.aout;
vcf_c0 = fs->pole.vcf_c0;
kp = fs->pole.kp;
kp1h = fs->pole.kp1h;
kres = fs->pole.kres;
ay1 = fs->pole.ay1;
ay2 = fs->pole.ay2;
lastin = fs->pole.lastin;
value = fs->pole.value;
}
//
// LBSynth
//
@@ -359,9 +309,6 @@ lb302Synth::lb302Synth( instrumentTrack * _instrumentTrack ) :
connect( &dist_knob, SIGNAL( dataChanged( ) ),
this, SLOT ( filterChanged( )));
connect( &wave_knob, SIGNAL( dataChanged( ) ),
this, SLOT ( waveChanged( )));
// SYNTH
@@ -409,9 +356,20 @@ lb302Synth::lb302Synth( instrumentTrack * _instrumentTrack ) :
lastFramesPlayed = 1; // because we subtract 1 later
last_offset = 0;
period_states = NULL;
new_freq = -1;
current_freq = -1;
previous_freq = -1;
previous_vco_inc = 0;
previous_sample = 0;
delete_freq = -1;
period_states_cnt = 0;
instrumentPlayHandle * iph = new instrumentPlayHandle( this );
engine::getMixer()->addPlayHandle( iph );
filterChanged();
detuneChanged();
}
@@ -496,6 +454,7 @@ void lb302Synth::db24Toggled( void )
void lb302Synth::detuneChanged( void )
{
/* LB303
float freq = vco_inc*engine::getMixer()->processingSampleRate()/vco_detune;
float slidebase_freq=0;
@@ -514,23 +473,7 @@ void lb302Synth::detuneChanged( void )
// May need to rescale vco_slide as well
if(vco_slide)
vco_slidebase = slidebase_freq*vco_detune/engine::getMixer()->processingSampleRate();
}
// TODO: Set vco_shape in here.
// setHintText is impossible from the synth now??
void lb302Synth::waveChanged( void )
{
/*
switch(int(rint(wave_knob.value()))) {
case 0: wave_knob.setHintText(tr("Sawtooth "),""); break;
case 1: wave_knob.setHintText(tr("Inverted Sawtooth "),""); break;
case 2: wave_knob.setHintText(tr("Triangle "),""); break;
case 3: wave_knob.setHintText(tr("Square "),""); break;
case 4: wave_knob.setHintText(tr("Rounded Square "),""); break;
case 5: wave_knob.setHintText(tr("Moog "),""); break;
}
*/
*/
}
@@ -562,22 +505,49 @@ inline int MIN(int a, int b) {
return (a<b)?a:b;
}
inline float GET_INC(float freq) {
return freq/**vco_detune*//engine::getMixer()->processingSampleRate(); // TODO: Use actual sampling rate.
}
int lb302Synth::process(sampleFrame *outbuf, const Uint32 size)
{
unsigned int i;
float w;
float samp;
if( delete_freq == current_freq ) {
// TODO: Crossfade
// previous_freq = delete_freq;
// previous_count = 0;
// previous_vco_inc = GET_INC( delete_freq );
// Normal release
delete_freq = -1;
vca_mode = 1;
}
if( new_freq > 0.0f ) {
lb302Note note;
note.vco_inc = GET_INC( new_freq );
//printf("GET_INC %f %f %d\n", note.vco_inc, new_freq, vca_mode );
///**vco_detune*//engine::getMixer()->processingSampleRate(); // TODO: Use actual sampling rate.
//printf("VCO_INC = %f\n", note.vco_inc);
note.dead = deadToggle.value();
initNote(&note);
use_hold_note = false;
//printf("%f %f, ", vco_inc, vco_c);
current_freq = new_freq;
new_freq = -1.0f;
//printf("GOT_INC %f %f %d\n\n", note.vco_inc, new_freq, vca_mode );
}
// TODO: NORMAL RELEASE
// vca_mode = 1;
for(i=0;i<size;i++) {
/* TODO: ONLY DO THIS IF WE ARE EDGE-TO-EDGE NON-DEAD */
/*
if (sample_cnt < desiredTransitionFrames()) {
for(int c=0; c<DEFAULT_CHANNELS; c++)
outbuf[i][c]=0;
sample_cnt++;
continue;
}
*/
// update vcf
if(vcf_envpos >= ENVINC) {
@@ -596,9 +566,6 @@ int lb302Synth::process(sampleFrame *outbuf, const Uint32 size)
sample_cnt++;
vcf_envpos++;
// unused variables
//float old_vco_k = vco_k;
//bool looking;
int decay_frames = 128;
// update vco
@@ -607,6 +574,7 @@ int lb302Synth::process(sampleFrame *outbuf, const Uint32 size)
if(vco_c > 0.5)
vco_c -= 1.0;
/*LB303
if (catch_decay > 0) {
if (catch_decay < decay_frames) {
catch_decay++;
@@ -615,7 +583,7 @@ int lb302Synth::process(sampleFrame *outbuf, const Uint32 size)
use_hold_note = false;
initNote(&hold_note);
}
}
}*/
switch(int(rint(wave_knob.value()))) {
case 0: vco_shape = SAWTOOTH; break;
@@ -669,15 +637,28 @@ int lb302Synth::process(sampleFrame *outbuf, const Uint32 size)
//vca_a = 0.5;
// Write out samples.
#ifdef LB_FILTERED
samp = vcf->process(vco_k)*2.0*vca_a;
//samp = vcf->process(vco_k)*2.0*vca_a;
//samp = vcf->process(vco_k)*2.0;
samp = vcf->process(vco_k) * vca_a;
//printf("%f %d\n", vco_c, sample_cnt);
//if( sample_cnt < 32 && previous_freq > 0.0f )
//{
previous_sample *= 0.96406088;
//float oldamt = (32.0f-(float)sample_cnt)*previous_sample/32.0f;
//printf("%d old %f\n", sample_cnt, oldamt);
//samp += previous_sample;
//}
#else
samp = vco_k*vca_a;
//samp = vco_k*vca_a;
#endif
/*
float releaseFrames = desiredReleaseFrames();
samp *= (releaseFrames - catch_decay)/releaseFrames;
*/
samp *= (float)(decay_frames - catch_decay)/(float)decay_frames;
//LB302 samp *= (float)(decay_frames - catch_decay)/(float)decay_frames;
for(int c=0; c<DEFAULT_CHANNELS; c++) {
outbuf[i][c]=samp;
@@ -704,13 +685,6 @@ int lb302Synth::process(sampleFrame *outbuf, const Uint32 size)
}
}
// Store state
period_states[i].vco_c = vco_c;
period_states[i].vca_a = vca_a; // Doesn't change anything (currently)
period_states[i].vca_mode = vca_mode; // Doesn't change anything (currently)
period_states[i].sample_cnt = sample_cnt; // Doesn't change anything (currently)
vcf->getState(&period_states[i].fs);
}
return 1;
}
@@ -727,11 +701,13 @@ void lb302Synth::initNote( lb302Note *n)
vco_inc = n->vco_inc;
// TODO: Try moving to the if() below
// Why vca_mode==3?
// Always reset vca on non-dead notes, and
// Only reset vca on decaying(decayed) and never-played
if(n->dead == 0 || (vca_mode==1 || vca_mode==3)) {
//printf(" good\n");
sample_cnt = 0;
vca_mode = 0;
// LB303:
vca_a = 0;
}
else {
@@ -741,6 +717,7 @@ void lb302Synth::initNote( lb302Note *n)
// Initiate Slide
// TODO: Break out into function, should be called again on detuneChanged
if (vco_slideinc) {
//printf(" sliding\n");
vco_slide = vco_inc-vco_slideinc;
vco_slidebase = vco_inc;
vco_slideinc = 0;
@@ -765,8 +742,8 @@ void lb302Synth::initNote( lb302Note *n)
vcf_envpos = ENVINC;
// Double Check
vca_mode = 0;
vca_a = 0.0;
//vca_mode = 0;
//vca_a = 0.0;
}
}
@@ -776,129 +753,27 @@ void lb302Synth::playNote( notePlayHandle * _n, bool,
{
fpp_t framesPerPeriod = engine::getMixer()->framesPerPeriod();
// <WEIRD CODE FOR MONOPHONIC BEHAVIOUR - BEGIN>
if( _n->arpBaseNote() )
{
return;
}
// number of frames to play - only modified below if we have to play
// the rest of an old note
fpp_t frames = _n->framesLeftForCurrentPeriod();
// per default we resume at the last played frames - only in
// some special-cases (which we catch below) we have to resume
// somewhere else
f_cnt_t resume_pos = lastFramesPlayed-1;
bool decay_note = false;
// find out which situation we're in
constNotePlayHandleVector v =
notePlayHandle::nphsOfInstrumentTrack( getInstrumentTrack(), TRUE );
// more than one note running?
if( v.count() > 1 )
{
const notePlayHandle * on = v.first(); // oldest note
const notePlayHandle * yn = v.last(); // youngest note
// are we playing a released note and the new (youngest) note
// has taken over successfully (i.e. played more than the
// difference of the two offsets)?
if ( _n->released() &&
yn->totalFramesPlayed() >= yn->offset() - on->offset() )
{
// then we do not need to play something anymore
return;
}
// have to fill up the frames left to the new note so limit
// frames to play for not getting into trouble
if( _n != yn && !yn->arpBaseNote() )
{
frames = tMin<fpp_t>( frames, yn->offset() - on->offset() );
#ifdef LB_DEBUG
// should be always true - why? I don't know... ;-)
assert( frames > 0 );
#endif
}
// new note while other notes are running?
if( v.count() > 1 && yn == _n &&
_n->totalFramesPlayed() == 0 )
{
// if there had been a previous note whose
// offset > _n->offset() it played more frames than
// we actually need - therefore clear everything before
// the offset of the youngest note, otherwise we get
// frames with both waves overlapped
engine::getMixer()->clearAudioBuffer(
_n->getInstrumentTrack()->getAudioPort()->firstBuffer(),
framesPerPeriod - yn->offset(),
yn->offset() );
resume_pos = yn->offset() - on->offset() - 1;
// make sure we have positive value, otherwise we're
// accessing states out of borders
while( resume_pos < 0 )
{
resume_pos += framesPerPeriod;
}
decay_note = true;
}
}
#ifdef LB_DEBUG
if( _n->released() )
{
}
else
{
}
#endif
// </WEIRD CODE FOR MONOPHONIC BEHAVIOUR>
/// Malloc our period history buffer
if (period_states == NULL) {
period_states = new lb302State[framesPerPeriod];
for (int i=0; i < framesPerPeriod; i++) {
period_states[i].vco_c = vco_c;
period_states[i].vca_a = vca_a; // Doesn't change anything (currently)
period_states[i].vca_mode = vca_mode; // Doesn't change anything (currently)
period_states[i].sample_cnt = sample_cnt; // Doesn't change anything (currently)
vcf->getState(&period_states[i].fs);
}
}
// now resume at the proper position and process as usual
lb302State *state = &period_states[resume_pos];
// Actually resume the state, now that we have the right state object.
vco_c = state->vco_c;
vca_a = state->vca_a;
vca_mode = state->vca_mode;
sample_cnt = state->sample_cnt;
vcf->setState(&state->fs);
// Currently have release/decay disabled
// Start the release decay if this is the first release period.
//if (_n->released() && catch_decay == 0)
// catch_decay = 1;
bool decay_note = false;
release_frame = _n->framesLeft() - desiredReleaseFrames();
if ( _n->totalFramesPlayed() <= 0 ) {
//LB303 if ( _n->totalFramesPlayed() <= 0 ) {
// This code is obsolete, hence the "if false"
// Existing note. Allow it to decay.
if(deadToggle.value() == 0 && decay_note) {
/*
#ifdef LB_DECAY
if (catch_decay < 1) {
// BEGIN NOT SURE OF...
@@ -914,35 +789,53 @@ void lb302Synth::playNote( notePlayHandle * _n, bool,
catch_decay = 1;
}
#else
lb302Note note;
*/
/* lb302Note note;
note.vco_inc = _n->frequency()*vco_detune/engine::getMixer()->processingSampleRate(); // TODO: Use actual sampling rate.
note.dead = deadToggle.value();
initNote(&note);
vca_mode=0;
vca_a = state->vca_a;
vca_mode=0;*/
//LB303 vca_a = state->vca_a;
#endif
//#endif
}
/// Start a new note.
else {
lb302Note note;
note.vco_inc = _n->frequency()*vco_detune/engine::getMixer()->processingSampleRate(); // TODO: Use actual sampling rate.
note.dead = deadToggle.value();
initNote(&note);
use_hold_note = false;
else if( _n->totalFramesPlayed() == 0 ) {
new_freq = _n->frequency();
_n->m_pluginData = this;
}
}
//LB303 }
//LB303 lastFramesPlayed = frames; //_n->framesLeftForCurrentPeriod(); //_n->totalFramesPlayed();
}
void lb302Synth::play( bool _try_parallelizing,
sampleFrame * _working_buffer )
{
//printf(".");
const fpp_t frames = engine::getMixer()->framesPerPeriod();
process( _working_buffer, frames);
getInstrumentTrack()->processAudioBuffer( _working_buffer, frames, _n );
lastFramesPlayed = frames; //_n->framesLeftForCurrentPeriod(); //_n->totalFramesPlayed();
getInstrumentTrack()->processAudioBuffer( _working_buffer, frames,
NULL );
}
void lb302Synth::deleteNotePluginData( notePlayHandle * _n )
{
//printf("GONE\n");
if( _n->frequency() == current_freq )
{
delete_freq = current_freq;
//previous_freq = current_freq;
previous_sample = vco_k * vca_a;
}
}

74
plugins/lb302/lb302.h
View File

@@ -52,38 +52,6 @@ class lb302FilterKnobState
float dist;
};
class lb302FilterIIR2State
{
public:
float vcf_c0;
float vcf_a;
float vcf_b;
float vcf_c;
float vcf_d1;
float vcf_d2;
};
class lb302Filter3PoleState
{
public:
float vcf_c0;
float kp,
kp1h,
kres,
ay1,
ay2,
lastin,
value;
float aout;
};
typedef union
{
lb302FilterIIR2State iir;
lb302Filter3PoleState pole;
}
lb302FilterState;
class lb302Filter
{
@@ -96,9 +64,6 @@ class lb302Filter
virtual float process(const float& samp)=0;
virtual void playNote();
virtual void getState(lb302FilterState* fs)=0;
virtual void setState(const lb302FilterState* fs)=0;
protected:
lb302FilterKnobState *fs;
@@ -119,9 +84,6 @@ class lb302FilterIIR2 : public lb302Filter
virtual void envRecalc();
virtual float process(const float& samp);
virtual void getState(lb302FilterState* fs);
virtual void setState(const lb302FilterState* fs);
protected:
float vcf_d1, // d1 and d2 are added back into the sample with
vcf_d2; // vcf_a and b as coefficients. IIR2 resonance
@@ -147,9 +109,6 @@ class lb302Filter3Pole : public lb302Filter
virtual void recalc();
virtual float process(const float& samp);
virtual void getState(lb302FilterState* fs);
virtual void setState(const lb302FilterState* fs);
protected:
float kfcn,
kp,
@@ -165,17 +124,6 @@ class lb302Filter3Pole : public lb302Filter
class lb302State
{
public:
float vco_c;
float vca_a;
int vca_mode;
int sample_cnt;
lb302FilterState fs;
};
class lb302Note
{
public:
@@ -191,6 +139,8 @@ public:
lb302Synth( instrumentTrack * _channel_track );
virtual ~lb302Synth();
virtual void play( bool _try_parallelizing,
sampleFrame * _working_buffer );
virtual void playNote( notePlayHandle * _n, bool _try_parallelizing,
sampleFrame * _working_buffer );
virtual void deleteNotePluginData( notePlayHandle * _n );
@@ -201,13 +151,14 @@ public:
virtual QString nodeName( void ) const;
virtual bool isMonophonic(void) const {
return true;
virtual bool supportsParallelizing( void ) const
{
return( FALSE );
}
virtual f_cnt_t desiredReleaseFrames( void ) const
{
return 4048;
return 0; //4048;
}
virtual pluginView * instantiateView( QWidget * _parent );
@@ -238,7 +189,6 @@ private:
public slots:
void filterChanged( void );
void detuneChanged( void );
void waveChanged( void );
void db24Toggled( void );
private:
@@ -275,19 +225,27 @@ private:
vca_a; // Amplifier coefficient.
// Envelope State
int vca_mode; // 0: attack, 1: decay, 2: idle
int vca_mode; // 0: attack, 1: decay, 2: idle, 3: never played
// My hacks
int sample_cnt;
int last_offset;
lb302State *period_states;
int period_states_cnt;
int catch_frame;
int catch_decay;
float new_freq;
float current_freq;
float previous_freq;
float previous_vco_inc;
float previous_sample;
float previous_count;
float delete_freq;
void recalcFilter();
int process(sampleFrame *outbuf, const Uint32 size);