MVP

src/yaw-tab/DistrhoPluginInfo.h

@@ -7,7 +7,7 @@
 
 #define DISTRHO_PLUGIN_HAS_UI       1
 #define DISTRHO_PLUGIN_IS_RT_SAFE   1
-#define DISTRHO_PLUGIN_NUM_INPUTS   2
+#define DISTRHO_PLUGIN_NUM_INPUTS   0
 #define DISTRHO_PLUGIN_NUM_OUTPUTS  2
 #define DISTRHO_PLUGIN_WANT_TIMEPOS 1
 #define DISTRHO_UI_USE_NANOVG       1
@@ -24,6 +24,7 @@ enum Parameters {
     kParameterTabletY,
     kParameterTabletZ,
     kParameterTabletPressure,
+    kParameterTime,
     kParameterCount
 };
 

src/yaw-tab/dsp.cpp

@@ -6,7 +6,8 @@ START_NAMESPACE_DISTRHO
 {
 public:
 	TabPlugin()
-        : Plugin(kParameterCount, 0, 0)
+		: Plugin(kParameterCount, 0, 0),
+		sampleRate(getSampleRate())
 	{
 		// clear all parameters
 		std::memset(fParameters, 0, sizeof(float) * kParameterCount);
@@ -25,7 +26,7 @@ protected:
 
 	void initParameter(uint32_t index, Parameter& parameter) override
 	{
-        parameter.hints = kParameterIsAutomable | kParameterIsOutput;
+		parameter.hints = kParameterIsAutomable;
 		parameter.ranges.def = 0.0f;
 		parameter.ranges.min = 0.0f;
 		parameter.ranges.max = 16777216.0f;
@@ -56,40 +57,69 @@ protected:
 			parameter.ranges.min = 0.0f;
 			parameter.ranges.max = 999.0f;
 			break;
+		case kParameterTime:
+			parameter.name = "t";
+			parameter.symbol = "t";
+			parameter.ranges.min = 0.0f;
+			parameter.ranges.max = 999.0f;
+			parameter.hints |= kParameterIsOutput;
+			break;
 		}
 	}
 
+	void sampleRateChanged(double newRate) override
+	{
+		sampleRate = newRate;
+	}
+
 	float getParameterValue(uint32_t index) const override
 	{
 		return fParameters[index];
 
 	}
 
-    void setParameterValue(uint32_t, float) override
+	void setParameterValue(uint32_t idx, float val) override
 	{
-        // this is only called for input parameters, which we have none of.
+		fParameters[idx] = val;
+		switch (idx) {
+		case kParameterTabletX:
+			period = 0.02f * (0.001f * val) * sampleRate;
+			break;
+		case kParameterTabletY:
+			break;
+		case kParameterTabletZ:
+			break;
+		case kParameterTabletPressure:
+			volume = 0.001f * val;
+			break;
+		}
 	}
 
 	void run(const float** inputs, float** outputs, uint32_t frames) override
 	{
-        /**
-           This plugin does nothing, it just demonstrates information usage.
-           So here we directly copy inputs over outputs, leaving the audio untouched.
-           We need to be careful in case the host re-uses the same buffer for both inputs and outputs.
-         */
-        if (outputs[0] != inputs[0])
-            std::memcpy(outputs[0], inputs[0], sizeof(float) * frames);
 
-        if (outputs[1] != inputs[1])
-            std::memcpy(outputs[1], inputs[1], sizeof(float) * frames);
+		for (uint32_t i = 0; i < frames; ++i) {
+			counter++;
+			if (counter > period) {
+				outputs[0][i] = outputs[1][i] = volume;
+				counter = 0;
+			}
+			else {
+				outputs[0][i] = outputs[1][i] = 0.0f;
+			}
+		}
 
-        // get time position
+		// Force UI to repaint via parameter change callback.
 		const TimePosition& timePos(getTimePosition());
-        fParameters[kParameterTabletPressure] = timePos.bbt.tick;
+		fParameters[kParameterTime] = timePos.bbt.tick;
 	}
 
 private:
 	float fParameters[kParameterCount];
+	float period = 0.f;
+	float counter = 0.f;
+	float volume = 0.f;
+	float sampleRate;
 
 	DISTRHO_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(TabPlugin)
 };

src/yaw-tab/ui.cpp

@@ -34,7 +34,10 @@ protected:
 	void parameterChanged(uint32_t index, float value) override
 	{
 
+		if (index != kParameterTime) {
 			fParameters[index] = value;
+			return;
+		}
 
 		//Lire donnés de la tablet
 		tab.NewPacket();
@@ -49,6 +52,10 @@ protected:
 		fParameters[kParameterTabletZ] = z;
 		fParameters[kParameterTabletPressure] = p;
 
+		setParameterValue(kParameterTabletX, x);
+		setParameterValue(kParameterTabletY, y);
+		setParameterValue(kParameterTabletZ, z);
+		setParameterValue(kParameterTabletPressure, p);
 
 		repaint();
 	}