web cpumeter. Not tested

templates/web/src/processor.c

@@ -22,10 +22,10 @@
 #include <stdint.h>
 
 typedef struct {
-	void *		handle;
+	void       *handle;
-	const char *	format;
+	const char *format;
-	const char * (*get_bindir)(void *handle);
+	const char *(*get_bindir)(void *handle);
-	const char * (*get_datadir)(void *handle);
+	const char *(*get_datadir)(void *handle);
 } plugin_callbacks;
 
 #include "data.h"
@@ -36,15 +36,15 @@ typedef struct {
 
 typedef struct {
 	plugin       p;
-	void *		mem;
+	void        *mem;
 #if DATA_PRODUCT_AUDIO_INPUT_CHANNELS_N > 0
 	float        x_buf[DATA_PRODUCT_AUDIO_INPUT_CHANNELS_N * 128];
-	const float *	x[DATA_PRODUCT_AUDIO_INPUT_CHANNELS_N];
+	const float *x[DATA_PRODUCT_AUDIO_INPUT_CHANNELS_N];
 	float        zero_buf[128];
 #endif
 #if DATA_PRODUCT_AUDIO_OUTPUT_CHANNELS_N > 0
 	float        y_buf[DATA_PRODUCT_AUDIO_OUTPUT_CHANNELS_N * 128];
-	float *		y[DATA_PRODUCT_AUDIO_OUTPUT_CHANNELS_N];
+	float       *y[DATA_PRODUCT_AUDIO_OUTPUT_CHANNELS_N];
 #endif
 #if DATA_PRODUCT_PARAMETERS_OUTPUT_N > 0
 	float        out_params[DATA_PRODUCT_PARAMETERS_OUTPUT_N];

templates/web/src/processor.js

@@ -27,6 +27,9 @@ var busesOut = buses.filter(x => x.type == "audio" && x.direction == "output");
 var nChansIn   = busesIn.reduce((a, x) => a + (x.channels == "mono" ? 1 : 2), 0);
 var nChansOut  = busesOut.reduce((a, x) => a + (x.channels == "mono" ? 1 : 2), 0);
 
+var cpu_meter  = 0.0;
+var sampleRate = 1.0;
+
 class Processor extends AudioWorkletProcessor {
 	constructor(options) {
 		super();
@@ -71,6 +74,8 @@ class Processor extends AudioWorkletProcessor {
 	}
 
 	process(inputs, outputs, params) {
+		const processTimeStart = performance.now();
+
 		for (var i = 0; i < this.parametersIn.length; i++) {
 			var index = this.parametersIn[i].index;
 			var parameter = parameters[index];
@@ -141,7 +146,11 @@ class Processor extends AudioWorkletProcessor {
 		
 		for (var i = 0; i < this.parametersOut.length; i++) {
 			var index = this.parametersOut[i].index;
-			var value = this.parametersOutValues[i];
+			var value;
+			if (parameters[index].isCpumeter)
+				value = cpu_meter;
+			else
+				value = this.parametersOutValues[i];
 			if (value != this.parametersOut[i].value) {
 				this.paramOutChangeMsg.index = index;
 				this.paramOutChangeMsg.value = value;
@@ -149,6 +158,10 @@ class Processor extends AudioWorkletProcessor {
 				this.parametersOut[i].value = value;
 			}
 		}
+		const processTimeEnd = performance.now();
+		const processTimeMs  = processTimeEnd - processTimeStart;
+		const processTimeS   = processTimeMs * 0.001;
+		cpu_meter = cpu_meter * 0.9 + (processTimeS * sampleRate) * 0.1;
 
 		return true; // because Chrome sucks: https://bugs.chromium.org/p/chromium/issues/detail?id=921354
 	}