Started to add portamento code.

dev
Holger Wirtz 3 years ago
parent 0d6edb7f4f
commit 6a3ad57f1f
  1. 4
      src/Makefile
  2. 2
      src/dexed.cpp
  3. 35
      src/porta.cpp
  4. 28
      src/porta.h

@ -7,7 +7,7 @@ DEBUG=1
INSTALL_DIR=/zynthian/zynthian-plugins/lv2
INSTALL_MYPLUGINS_DIR=/zynthian/zynthian-my-data/presets/lv2
OBJ=fm_core.o env.o lfo.o dx7note.o sin.o pitchenv.o fm_op_kernel.o freqlut.o exp2.o EngineMkI.o EngineOpl.o PluginFx.o trace.o
OBJ=fm_core.o env.o lfo.o dx7note.o sin.o pitchenv.o fm_op_kernel.o freqlut.o exp2.o EngineMkI.o EngineOpl.o PluginFx.o trace.o porta.o
CXXFLAGS_LVTK=$(shell pkg-config --cflags lvtk-plugin-2)
CXXFLAGS+=-fPIC -DPIC -std=c++11 -I. $(CXXFLAGS_LVTK) -DLVTK_DEBUG=false
@ -130,5 +130,7 @@ EngineOpl.o: Makefile EngineOpl.cpp
PluginFx.o: Makefile PluginFx.cpp
$(CXX) $(CXXFLAGS) -Wall -c PluginFx.cpp
porta.o: Makefile porta.cpp
$(CXX) $(CXXFLAGS) -Wall -c porta.cpp
dexed_ttl.h: Dexed.ttl
ttl2c Dexed.ttl dexed_ttl.h

@ -30,6 +30,7 @@
#include "PluginFx.h"
#include <unistd.h>
#include <limits.h>
#include "porta.h"
Dexed::Dexed(double rate) : lvtk::Synth<DexedVoice, Dexed>(p_n_ports, p_midi_in)
{
@ -46,6 +47,7 @@ Dexed::Dexed(double rate) : lvtk::Synth<DexedVoice, Dexed>(p_n_ports, p_midi_in)
Lfo::init(rate);
PitchEnv::init(rate);
Env::init_sr(rate);
Porta::init_sr(rate);
fx.init(rate);
engineMkI=new EngineMkI;

@ -0,0 +1,35 @@
/*
Copyright 2019 Jean Pierre Cimalando.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
#include <math.h>
#include "porta.h"
#include "msfa/synth.h"
void Porta::init_sr(double sampleRate)
{
// compute portamento for CC 7-bit range
for (unsigned int i = 0; i < 128; ++i) {
// number of semitones travelled
double sps = 350.0 * pow(2.0, -0.062 * i); // per second
double spf = sps / sampleRate; // per frame
double spp = spf * N; // per period
const int step = (1 << 24) / 12;
rates[i] = (int32_t)(0.5f + step * spp); // to pitch units
}
}
int32_t Porta::rates[128];

@ -0,0 +1,28 @@
/*
Copyright 2019 Jean Pierre Cimalando.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
#ifndef SYNTH_PORTA_H_
#define SYNTH_PORTA_H_
#include <stdint.h>
struct Porta {
public:
static void init_sr(double sampleRate);
static int32_t rates[128];
};
#endif // SYNTH_PORTA_H_
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