Added original Dexed clipping code. Can be disabled by setting

"-DNON_DEXED_CLIP" in Makefile.
Added switch for enabling pitch-wheel code - but this code seems currently to
broken. For enabling add "-DPITCHWHEEL" in Makefile.
Renamed method for calculating which operator is a carrier.
Smaller optimizations.

src/Makefile

@@ -5,6 +5,9 @@ OBJ=fm_core.o env.o lfo.o dx7note.o sin.o pitchenv.o fm_op_kernel.o freqlut.o ex
 CFLAGS=-fPIC -DPIC -std=c++11 -I. -I/usr/local/include/lvtk-2 -DLVTK_DEBUG=false
 LDFLAGS=-L/usr/local/lib -llvtk_plugin2
 
+#CFLAGS_OPTIONS+=-DNON_DEXED_CLIP	# enable for non-dexed-cliping code
+#CFLAGS_OPTIONS+=-DPITCHWHEEL		# enable for adding pitchwheel code
+
 ifeq ($(ARCH),)
    ARCH := $(shell uname -m)
 endif
@@ -41,13 +44,13 @@ endif
 
 ifeq ($(DEBUG), 1)
    ifeq ($(FILETRACE), 1)
-      CXXFLAGS += -DDEBUG -DFILETRACE $(CFLAGS)
+      CXXFLAGS += -DDEBUG -DFILETRACE $(CFLAGS) $(CFLAGS_OPTIONS)
    else
-      CXXFLAGS += -DDEBUG $(CFLAGS)
+      CXXFLAGS += -DDEBUG $(CFLAGS) $(CFLAGS_OPTIONS)
    endif
 else
    #CXXFLAGS += -Ofast $(CFLAGS) $(CPU) $(FPU)
-   CXXFLAGS += $(CFLAGS) -O3 -mcpu=cortex-a7 -mtune=cortex-a7 -mfpu=neon-vfpv4 -mfloat-abi=hard -mvectorize-with-neon-quad
+   CXXFLAGS += $(CFLAGS) $(CFLAGS_OPTIONS) -O3 -mcpu=cortex-a7 -mtune=cortex-a7 -mfpu=neon-vfpv4 -mfloat-abi=hard -mvectorize-with-neon-quad
 endif
 
 all: $(BUNDLE) Makefile

src/dexed.cpp

@@ -428,11 +428,14 @@ void Dexed::GetSamples(uint32_t n_samples, float* buffer)
         if (voices[note].live) {
           voices[note].dx7_note->compute(audiobuf.get(), lfovalue, lfodelay, &controllers);
           for (uint32_t j=0; j < N; ++j) {
-            /*int32_t val = audiobuf.get()[j];
+#ifndef NON_DEXED_CLIP
+            int32_t val = audiobuf.get()[j];
             val = val >> 4;
             int32_t clip_val = val < -(1 << 24) ? 0x8000 : val >= (1 << 24) ? 0x7fff : val >> 9; 
-            float f = static_cast<float>(clip_val)/0x8000; */
+            float f = static_cast<float>(clip_val)/0x8000;
+#else
             float f=static_cast<float>(audiobuf.get()[j]<<2)/INT_MAX;
+#endif
             if(f>1.0)
               f=1.0;
             if(f<-1.0)
@@ -457,7 +460,7 @@ void Dexed::GetSamples(uint32_t n_samples, float* buffer)
 
   if(++_param_counter%32)
   {
-    uint8_t op_out=controllers.core->op_out(data[134]); // look for carriers
+    uint8_t op_carrier=controllers.core->get_carrier_operators(data[134]); // look for carriers
 
     for(i=0;i < MAX_ACTIVE_NOTES;i++)
     {
@@ -470,8 +473,10 @@ void Dexed::GetSamples(uint32_t n_samples, float* buffer)
 
         for(uint8_t op=0;op<6;op++)
         {
-          TRACE("op=%d op_out=%d 2^op=%d %d",op,op_out,static_cast<uint8_t>(pow(2,op)),op_out&static_cast<uint8_t>(pow(2,op)));
-          if((op_out&static_cast<uint8_t>(pow(2,op)))>0)
+          uint8_t op_bit=static_cast<uint8_t>(pow(2,op));
+
+          TRACE("op=%d op_out=%d 2^op=%d %d",op,op_out,op_bit,op_out&op_bit);
+          if((op_carrier&op_bit)>0)
           {
             // this voice is a carrier!
             op_carrier_num++;
@@ -484,7 +489,8 @@ void Dexed::GetSamples(uint32_t n_samples, float* buffer)
         }
         if(op_amp==op_carrier_num)
 	{
-          voices[i].live=false; // every carrier produces no audio anymore
+          // all carrier-operators are silent -> disable the voice
+          voices[i].live=false;
           TRACE("Shutting down Voice[%2d]",i);
         }
       }

src/manifest.ttl

@@ -8,17 +8,18 @@
 @prefix foaf: <http://xmlns.com/foaf/0.1/> .
 
 <https://github.com/dcoredump/dexed.lv2>
-    a lv2:Plugin ;
+    a lv2:Plugin, doap:Project, lv2:SynthPlugin ;
     doap:name "Dexed" ;
     doap:description "Synth" ;
     doap:shortdesc "Dexed" ;
-    lv2:minorVersion 1; lv2:microVersion 0;
     doap:homepage <https://github.com/dcoredump/dexed/tree/native-lv2> ;
         doap:maintainer [
         foaf:name "dcoredump" ;
         foaf:homepage <https://github.com/dcoredump/dexed/tree/native-lv2> ;
         foaf:mbox <mailto:dcoredump@googlemail.com> ;
     ] ;
+    rdfs:comment "Dexed.lv2 is a native LV2 port of the famous DX-7 emulator Dexed.";
+    lv2:microVersion 1 ;lv2:minorVersion 0 ;
     doap:developer [
         a foaf:Person ;
         foaf:name "Pascal Gauthier" ;

src/msfa/dx7note.cc

@@ -190,7 +190,7 @@ void Dx7Note::compute(int32_t *buf, int32_t lfo_val, int32_t lfo_delay, const Co
     int32_t pitch_mod = max(pmod_1, pmod_2);
     pitch_mod = pitchenv_.getsample() + (pitch_mod * (senslfo < 0 ? -1 : 1));
     
-/*
+#ifdef PITCHWHEEL
     int pitchbend = ctrls->values_[kControllerPitch];
     int32_t pb = (pitchbend - 0x2000);
     if (pb != 0) {
@@ -204,8 +204,9 @@ void Dx7Note::compute(int32_t *buf, int32_t lfo_val, int32_t lfo_delay, const Co
     }
     pitch_mod += pb;
     pitch_mod += ctrls->masterTune;
-*/
-//TRACE("pitch_mod=%d pb=%d");
+
+TRACE("pitch_mod=%d pb=%d");
+#endif
 
     // ==== AMP MOD ====
     uint32_t amod_1 = ((int64_t) ampmoddepth_ * (int64_t) lfo_delay) >> 8; // Q24 :D

src/msfa/fm_core.cc

@@ -68,7 +68,7 @@ int n_out(const FmAlgorithm &alg) {
   return count;
 }
 
-uint8_t FmCore::op_out(uint8_t algorithm)
+uint8_t FmCore::get_carrier_operators(uint8_t algorithm)
 {
   uint8_t op_out=0;
   FmAlgorithm alg=algorithms[algorithm];

src/msfa/fm_core.h

@@ -48,7 +48,7 @@ class FmCore {
 public:
     virtual ~FmCore() {};
     static void dump();
-    uint8_t op_out(uint8_t algorithm);
+    uint8_t get_carrier_operators(uint8_t algorithm);
     virtual void render(int32_t *output, FmOpParams *params, int algorithm, int32_t *fb_buf, int32_t feedback_gain);
 protected:
     AlignedBuf<int32_t, N>buf_[2];