transpose gadget; fixed Testron parameter stride (d'oh!)

notes

@@ -91,7 +91,7 @@ TODO {
     gadgets and bundled things {
         (the simple things:)
         - gain and panning gadget
-        note transpose
+        - note transpose
         volume meter
         
         Polyplexer (splits a single command input into several monophonic outputs and keeps track of individual notes between them)

xybrid/gadgets/testsynth.cpp

@@ -79,7 +79,7 @@ void TestSynth::process() {
         } else if (n < -1 && id == noteId) { // note off
             tvol = 0.0;
         }
-        mi += 5 + cp->data[mi+4];
+        mi += 5 + cp->data[mi+4]*2;
     }
 
     size_t ts = audioEngine->curTickSize();

xybrid/gadgets/transpose.cpp

@@ -0,0 +1,97 @@
+#include "transpose.h"
+using Xybrid::Gadgets::Transpose;
+using namespace Xybrid::Data;
+
+#include "data/porttypes.h"
+
+#include "config/pluginregistry.h"
+using namespace Xybrid::Config;
+
+#include "audio/audioengine.h"
+using namespace Xybrid::Audio;
+
+#include "ui/patchboard/nodeobject.h"
+#include "ui/gadgets/knobgadget.h"
+using namespace Xybrid::UI;
+
+#include <cmath>
+
+#include <QCborMap>
+
+namespace {
+    bool _ = PluginRegistry::enqueueRegistration([] {
+        auto i = std::make_shared<PluginInfo>();
+        i->id = "gadget:transpose";
+        i->displayName = "Transpose";
+        i->category = "Gadget";
+        //i->hidden = true;
+        i->createInstance = []{ return std::make_shared<Transpose>(); };
+        PluginRegistry::registerPlugin(i);
+        //inf = i;
+    });
+}
+
+Transpose::Transpose() {
+
+}
+
+void Transpose::init() {
+    addPort(Port::Input, Port::Command, 0);
+    addPort(Port::Output, Port::Command, 0);
+}
+
+void Transpose::process() {
+    int off = amount.load();
+
+    auto in = std::static_pointer_cast<CommandPort>(port(Port::Input, Port::Command, 0));
+    auto out = std::static_pointer_cast<CommandPort>(port(Port::Output, Port::Command, 0));
+    in->pull();
+    out->pull();
+
+    out->data = reinterpret_cast<uint8_t*>(audioEngine->tickAlloc(in->dataSize));
+    out->dataSize = in->dataSize;
+    memcpy(out->data, in->data, in->dataSize); // precopy
+
+    size_t mi = 0;
+    while (out->dataSize >= mi+5) {
+        int16_t& n = reinterpret_cast<int16_t&>(out->data[mi+2]);
+        if (n > -1) {
+            int nn = n;
+            nn += off;
+            if (nn < 0 || nn > 32767) nn = -1;
+            n = static_cast<int16_t>(nn);
+        }
+        mi += 5 + out->data[mi+4]*2;
+    }
+
+
+}
+
+void Transpose::saveData(QCborMap& m) {
+    m.insert(QString("amount"), QCborValue(amount));
+}
+
+void Transpose::loadData(QCborMap& m) {
+    amount = static_cast<int>(m.value("amount").toInteger(0));
+}
+
+void Transpose::onGadgetCreated() {
+    if (!obj) return;
+
+    //obj->showName = false;
+    //obj->canRename = false;
+    obj->showPluginName = false;
+    obj->setGadgetSize(12*2+32, 64);
+
+    {
+        auto k = new KnobGadget(obj->contents);
+        k->setPos(12, 16);
+        k->min = -24;
+        k->max = 24;
+        k->step = 1;
+        k->bind(amount);
+
+        k->setLabel("Transpose");
+        //k->fText = [](double d) { return QString("%1dB").arg(d); };
+    }
+}

xybrid/gadgets/transpose.h

@@ -0,0 +1,30 @@
+#pragma once
+
+#include <atomic>
+
+#include "data/node.h"
+
+namespace Xybrid::Gadgets {
+    class Transpose : public Data::Node {
+        std::atomic<int> amount = 0;
+    public:
+        Transpose();
+        ~Transpose() override = default;
+
+        void init() override;
+        //void reset() override;
+        void process() override;
+
+        //void onRename() override;
+
+        void saveData(QCborMap&) override;
+        void loadData(QCborMap&) override;
+
+        //void onUnparent(std::shared_ptr<Data::Graph>) override;
+        //void onParent(std::shared_ptr<Data::Graph>) override;
+
+        void onGadgetCreated() override;
+
+        //void drawCustomChrome(QPainter*, const QStyleOptionGraphicsItem*) override;
+    };
+}

xybrid/xybrid.pro

@@ -57,7 +57,8 @@ SOURCES += \
     gadgets/testsynth.cpp \
     util/keys.cpp \
     ui/gadgets/knobgadget.cpp \
-    gadgets/gainbalance.cpp
+    gadgets/gainbalance.cpp \
+    gadgets/transpose.cpp
 
 HEADERS += \
         mainwindow.h \
@@ -90,7 +91,8 @@ HEADERS += \
     util/keys.h \
     ui/gadgets/knobgadget.h \
     gadgets/gainbalance.h \
-    util/pattern.h
+    util/pattern.h \
+    gadgets/transpose.h
 
 FORMS += \
         mainwindow.ui