cpu meter support for lv2

notes

@@ -162,6 +162,14 @@ product {
 				web: not (yet) used
 				cmd: not (yet) used
 				android: not (yet) used
+			isCpumeter:
+				parameter is output cpu meter? boolean
+				VST3: TODO
+				LV2: data.h, lv2.c
+				web: TODO
+				cmd: TODO
+				android: TODO
+				ios: TODO
 			defaultValue:
 				default value, number, mapped, required for non-bypass
 				VST3: ParameterInfo defaultNormalizedValue, controller initialize

templates/common/fatica.h

@@ -0,0 +1,63 @@
+#ifndef FATICA_H
+#define FATICA_H
+
+// API
+
+// unit = 100-nanosecond starting from somewhen
+unsigned long long fatica_time_process(void);
+
+// Implementation
+
+#if defined(_WIN32) || defined(__CYGWIN__)
+
+#include <windows.h>
+
+static ULONGLONG filetime_to_ull(const FILETIME* ft) {
+	return (((ULONGLONG)ft->dwHighDateTime) << 32) + ft->dwLowDateTime;
+}
+
+unsigned long long fatica_time_process(void) {
+	FILETIME creationTime, exitTime, kernelTime, userTime;
+	const DWORD threadId = GetCurrentThreadId();
+	const HANDLE hThread = OpenThread(THREAD_QUERY_INFORMATION, FALSE, threadId);
+	if (!GetThreadTimes(hThread, &creationTime, &exitTime, &kernelTime, &userTime))
+		return 0ull;
+	CloseHandle(hThread);
+	return (unsigned long long) (filetime_to_ull(&kernelTime) + filetime_to_ull(&userTime));
+}
+
+#elif defined(__linux__)
+
+#if __STDC_VERSION__ >= 199901L
+# define _XOPEN_SOURCE 600
+#else
+# define _XOPEN_SOURCE 500
+#endif
+#include <time.h>
+#include <unistd.h>
+
+unsigned long long fatica_time_process(void) {
+	struct timespec ts;
+	if (clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts) != 0)
+		return 0ull;
+	return (unsigned long long) (ts.tv_sec * 1e7 + ts.tv_nsec / 1e2);
+}
+
+#elif defined(__APPLE__)
+
+#include <unistd.h>
+#include <mach/mach.h>
+#include <mach/thread_act.h>
+
+unsigned long long fatica_time_process(void) {
+	thread_t thread = mach_thread_self();
+	thread_basic_info_data_t info;
+	mach_msg_type_number_t count = THREAD_BASIC_INFO_COUNT;
+    if (thread_info(thread, THREAD_BASIC_INFO, (thread_info_t) &info, &count) != KERN_SUCCESS)
+        return 0ull;
+    return (info.user_time.seconds + info.system_time.seconds) * 1000 
+    	+ (info.user_time.microseconds + info.system_time.microseconds) / 1000;
+}
+
+#endif
+#endif // FATICA_H

templates/lv2/src/data.h

@@ -63,6 +63,9 @@ static struct {
 static uint32_t param_out_index[DATA_PRODUCT_CONTROL_OUTPUTS_N] = {
 	{{~it.tibia.lv2.ports.filter(x => x.type == "control" && x.direction == "output") :p}}{{=p.paramIndex}}, {{~}}
 };
+{{?it.product.parameters.find(x => x.direction == "output" && x.isCpumeter)}}
+# define PARAM_OUT_CPU_INDEX {{=it.product.parameters.indexOf(it.product.parameters.find(x => x.direction == "output" && x.isCpumeter))}}
+{{?}}
 #endif
 
 {{?it.lv2.ui}}

templates/lv2/src/lv2.c

@@ -66,6 +66,10 @@ typedef struct {
 # include <pmmintrin.h>
 #endif
 
+#ifdef PARAM_OUT_CPU_INDEX
+# include "fatica.h"
+#endif
+
 static inline float clampf(float x, float m, float M) {
 	return x < m ? m : (x > M ? M : x);
 }
@@ -107,6 +111,10 @@ typedef struct {
 #if DATA_PRODUCT_MIDI_INPUTS_N + DATA_PRODUCT_MIDI_OUTPUTS_N > 0
 	LV2_URID                 uri_midi_MidiEvent;
 #endif
+#ifdef PARAM_OUT_CPU_INDEX
+	float                    cpu_meter;
+	float                    sample_rate;
+#endif
 } plugin_instance;
 
 static const char * get_bundle_path_cb(void *handle) {
@@ -182,6 +190,10 @@ static LV2_Handle instantiate(const struct LV2_Descriptor * descriptor, double s
 	for (uint32_t i = 0; i < DATA_PRODUCT_CONTROL_INPUTS_N + DATA_PRODUCT_CONTROL_OUTPUTS_N; i++)
 		instance->c[i] = NULL;
 #endif
+#ifdef PARAM_OUT_CPU_INDEX
+	instance->cpu_meter = 0.f;
+	instance->sample_rate = sample_rate;
+#endif
 
 	return instance;
 
@@ -244,6 +256,10 @@ static void activate(LV2_Handle instance) {
 static void run(LV2_Handle instance, uint32_t sample_count) {
 	plugin_instance * i = (plugin_instance *)instance;
 
+#ifdef PARAM_OUT_CPU_INDEX
+	const unsigned long long processTimeStart = fatica_time_process();
+#endif
+
 #if defined(__aarch64__)
 	uint64_t fpcr;
 	__asm__ __volatile__ ("mrs %0, fpcr" : "=r"(fpcr));
@@ -298,9 +314,16 @@ static void run(LV2_Handle instance, uint32_t sample_count) {
 #if DATA_PRODUCT_CONTROL_OUTPUTS_N > 0
 	for (uint32_t j = 0; j < DATA_PRODUCT_CONTROL_OUTPUTS_N; j++) {
 		uint32_t k = param_out_index[j];
-		if (i->c[k] != NULL)
+		if (i->c[k] != NULL) {
+# ifdef PARAM_OUT_CPU_INDEX
+			if (k == PARAM_OUT_CPU_INDEX) {
+				*i->c[k] = i->cpu_meter;
+				continue;
+			}
+# endif
 			*i->c[k] = plugin_get_parameter(&i->p, k);
 		}
+	}
 #else
 	(void)plugin_get_parameter;
 #endif
@@ -311,6 +334,14 @@ static void run(LV2_Handle instance, uint32_t sample_count) {
 	_MM_SET_FLUSH_ZERO_MODE(flush_zero_mode);
 	_MM_SET_DENORMALS_ZERO_MODE(denormals_zero_mode);
 #endif
+
+#ifdef PARAM_OUT_CPU_INDEX
+	const unsigned long long processTimeEnd = fatica_time_process();
+	const unsigned long long processTime100n = processTimeEnd - processTimeStart;
+	const double processTimeS = ((double) processTime100n) * 1.0e-7;
+	i->cpu_meter = i->cpu_meter * 0.9f + ((float) (processTimeS * i->sample_rate)) * 0.1f;
+#endif
+
 }
 
 static void cleanup(LV2_Handle instance) {
@@ -391,8 +422,8 @@ static LV2UI_Handle ui_instantiate(const LV2UI_Descriptor * descriptor, const ch
 
 	plugin_ui_callbacks cbs = {
 		/* .handle        = */ (void *)instance,
-		/* .format		= */ "lv2",
-		/* .get_bindir		= */ ui_get_bundle_path_cb,
+		/* .format.       = */ "lv2",
+		/* .get_bindir.   = */ ui_get_bundle_path_cb,
 		/* .get_datadir   = */ ui_get_bundle_path_cb,
 # if DATA_PRODUCT_CONTROL_INPUTS_N > 0
 		/* .set_parameter = */ ui_set_parameter_cb

test/product.json

@@ -132,6 +132,24 @@
 				"list": false,
 				"unit": "",
 				"map": "linear"
+			},
+			{
+				"name": "cpu",
+				"shortName": "cpu",
+				"id": "cpu",
+				"direction": "output",
+				"isBypass": false,
+				"isLatency": false,
+				"isCpumeter": true,
+				"defaultValue": 0.0,
+				"minimum": 0.0,
+				"maximum": 1.0,
+				"toggled": false,
+				"optional": false,
+				"integer": false,
+				"list": false,
+				"unit": "%",
+				"map": "linear"
 			}
 		],
 		"ui": {

test/run.sh

@@ -7,6 +7,7 @@ cp $dir/plugin.h $dir/plugin_ui.h $dir/../out/vst3/src
 
 $dir/../tibia $dir/product.json,$dir/company.json,$dir/lv2.json $dir/../templates/lv2 $dir/../out/lv2
 $dir/../tibia $dir/product.json,$dir/company.json,$dir/lv2.json,$dir/lv2-make.json $dir/../templates/lv2-make $dir/../out/lv2
+cp $dir/../templates/common/* $dir/../out/lv2/src/
 cp $dir/plugin.h $dir/plugin_ui.h $dir/../out/lv2/src
 
 $dir/../tibia $dir/product.json,$dir/company.json $dir/../templates/web $dir/../out/web