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This is really lb302. I promise.

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git-svn-id: https://lmms.svn.sf.net/svnroot/lmms/trunk/lmms@528 0778d3d1-df1d-0410-868b-ea421aaaa00d
This commit is contained in:
Paul Giblock
2007-08-19 20:00:54 +00:00
parent 396ce5d39c
commit 69dcd6bbfc
2 changed files with 49 additions and 25 deletions
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72
plugins/lb302/lb302.cpp
View File

@@ -62,7 +62,7 @@
// New config
//
#define LB_24_IGNORE_ENVELOPE
//#define LB_FILTERED
#define LB_FILTERED
//#define LB_24_RES_TRICK
#define LB_DIST_RATIO 4.0
@@ -593,6 +593,7 @@ int lb302Synth::process(sampleFrame *outbuf, const Uint32 size)
float w;
float samp;
for(i=0;i<size;i++) {
@@ -624,16 +625,22 @@ int lb302Synth::process(sampleFrame *outbuf, const Uint32 size)
float old_vco_k = vco_k;
bool looking;
int decay_frames = 128;
// update vco
vco_c += vco_inc;
if(vco_c > 0.5) vco_c -= 1.0;
/*
if (catch_decay < desiredTransitionFrames()) {
catch_decay++;
continue;
}*/
if (catch_decay > 0) {
if (catch_decay < decay_frames) {
catch_decay++;
}
else if (use_hold_note) {
use_hold_note = false;
initNote(&hold_note);
}
}
switch(int(rint(wave_knob->value()))) {
@@ -683,7 +690,7 @@ int lb302Synth::process(sampleFrame *outbuf, const Uint32 size)
break;
}
vca_a = 0.5;
//vca_a = 0.5;
// Write out samples.
#ifdef LB_FILTERED
samp = vcf->process(vco_k)*2.0*vca_a;
@@ -694,17 +701,17 @@ int lb302Synth::process(sampleFrame *outbuf, const Uint32 size)
float releaseFrames = desiredReleaseFrames();
samp *= (releaseFrames - catch_decay)/releaseFrames;
*/
samp *= (float)(decay_frames - catch_decay)/(float)decay_frames;
for(int c=0; c<DEFAULT_CHANNELS; c++) {
outbuf[i][c]=samp;
}
// Store state
period_states[i].vco_c = vco_c;
period_states[i].vca_a = vca_a; // Doesn't change anything (currently)
period_states[i].sample_cnt = sample_cnt; // Doesn't change anything (currently)
/* if(i>release_frame) {
vca_mode=1;
}*/
// Handle Envelope
// TODO: Add decay once I figure out how to extend past the end of a note.
if(vca_mode==0) {
@@ -719,13 +726,19 @@ int lb302Synth::process(sampleFrame *outbuf, const Uint32 size)
// the following line actually speeds up processing
if(vca_a < (1/65536.0)) { vca_a = 0; vca_mode = 2; }
}
// 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)
}
return 1;
}
/* Prepares the active LB302 note. I separated this into a function because it
* needs to be called on playNote() when a new note is started. It also needs
* needs to be called on0playNote() when a new note is started. It also needs
* to be called from process() when a prior edge-to-edge note is done releasing.
*/
void lb302Synth::initNote( lb302Note *n)
@@ -793,6 +806,8 @@ void lb302Synth::playNote( notePlayHandle * _n, bool )
// 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 );
@@ -842,7 +857,8 @@ void lb302Synth::playNote( notePlayHandle * _n, bool )
{
resume_pos += framesPerPeriod;
}
}
decay_note = true;
}
}
#ifdef LB_DEBUG
@@ -872,6 +888,7 @@ void lb302Synth::playNote( notePlayHandle * _n, bool )
/// 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;
@@ -882,21 +899,26 @@ void lb302Synth::playNote( notePlayHandle * _n, bool )
// catch_decay = 1;
release_frame = _n->framesLeft() - desiredReleaseFrames();
if ( _n->totalFramesPlayed() <= 0 ) {
/// This code is obsolete, hence the "if false"
// Existing note. Allow it to decay.
if(/*note_count*/ false) {
// BEGIN NOT SURE OF...
//lb302State *st = &period_states[period_states_cnt-1];
//vca_a = st->vca_a;
//sample_cnt = st->sample_cnt;
// END NOT SURE OF
if(deadToggle->value()==0 && decay_note) {
if (catch_decay < 1) {
// BEGIN NOT SURE OF...
//lb302State *st = &period_states[period_states_cnt-1];
//vca_a = st->vca_a;
//sample_cnt = st->sample_cnt;
// END NOT SURE OF
// Reserve this note for retrigger in process()
hold_note.vco_inc = _n->frequency()*vco_detune/LB_HZ; // TODO: Use actual sampling rate.
hold_note.dead = deadToggle->value();
use_hold_note = true;
// Reserve this note for retrigger in process()
hold_note.vco_inc = _n->frequency()*vco_detune/LB_HZ; // TODO: Use actual sampling rate.
hold_note.dead = deadToggle->value();
use_hold_note = true;
catch_decay = 1;
}
}
/// Start a new note.
else {

2
plugins/lb302/lb302.h
View File

@@ -124,6 +124,7 @@ class lb302State
public:
float vco_c;
float vca_a;
int vca_mode;
int sample_cnt;
};
@@ -217,6 +218,7 @@ private:
bool use_hold_note;
int lastFramesPlayed;
int release_frame;
// More States