Added VSTHost media add-on.

src/add-ons/media/media-add-ons/Jamfile

@@ -18,4 +18,5 @@ SubInclude HAIKU_TOP src add-ons media media-add-ons video_producer_demo ;
 SubInclude HAIKU_TOP src add-ons media media-add-ons videowindow ;
 SubInclude HAIKU_TOP src add-ons media media-add-ons video_mixer ;
 SubInclude HAIKU_TOP src add-ons media media-add-ons equalizer ;
+SubInclude HAIKU_TOP src add-ons media media-add-ons vst_host ;
 

src/add-ons/media/media-add-ons/vst_host/Jamfile

@@ -0,0 +1,10 @@
+SubDir HAIKU_TOP src add-ons media media-add-ons vst_host ;
+
+AddResources vst_host.media_addon : VSTHost.rdef ;
+
+Addon vst_host.media_addon :
+	VSTHost.cpp
+	VSTAddOn.cpp
+	VSTNode.cpp
+	: be media
+;

src/add-ons/media/media-add-ons/vst_host/VSTAddOn.cpp

@@ -0,0 +1,145 @@
+/*
+ * Copyright 2012, Gerasim Troeglazov (3dEyes**), 3dEyes@gmail.com. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */
+
+#include <Entry.h>
+#include <Directory.h>
+#include <FindDirectory.h>
+
+#include "VSTNode.h"
+#include "VSTAddOn.h"
+
+extern "C" _EXPORT BMediaAddOn* make_media_addon(image_id image)
+{
+	return new VSTAddOn(image);
+}
+
+VSTAddOn::VSTAddOn(image_id image) : BMediaAddOn(image)
+{
+	const char vst_subdir[]={"media/vstplugins"};
+
+	BPath addons_dir;
+	fPluginsList.MakeEmpty();
+
+	find_directory(B_COMMON_ADDONS_DIRECTORY, &addons_dir);
+	addons_dir.Append(vst_subdir);
+	ScanPluginsFolders(addons_dir.Path(), true);
+
+	find_directory(B_USER_ADDONS_DIRECTORY, &addons_dir);
+	addons_dir.Append(vst_subdir);
+	ScanPluginsFolders(addons_dir.Path() ,true);
+
+	find_directory(B_BEOS_ADDONS_DIRECTORY, &addons_dir);
+	addons_dir.Append(vst_subdir);	
+	ScanPluginsFolders(addons_dir.Path());
+}
+
+VSTAddOn::~VSTAddOn()
+{	
+	
+}
+	
+status_t 
+VSTAddOn::InitCheck(const char **text) 
+{
+	return B_OK;
+}
+	
+int32 
+VSTAddOn::CountFlavors()
+{
+	return fPluginsList.CountItems();
+}
+
+status_t VSTAddOn::GetFlavorAt( int32 idx,	const flavor_info **info) 
+{
+	if(idx < 0 || idx >= fPluginsList.CountItems())
+		return B_ERROR;
+		
+	VSTPlugin *plugin = (VSTPlugin*)fPluginsList.ItemAt(idx);	
+	
+	flavor_info *f_info = new flavor_info;
+	f_info->internal_id = idx;
+	f_info->kinds = B_BUFFER_CONSUMER | B_BUFFER_PRODUCER | B_CONTROLLABLE;
+	f_info->possible_count = 0;
+	f_info->flavor_flags = 0;
+	f_info->name = (char *)plugin->ModuleName();
+	f_info->info = (char *)plugin->Product();
+	
+	media_format *format = new media_format;
+	format->type = B_MEDIA_RAW_AUDIO;
+	format->u.raw_audio = media_raw_audio_format::wildcard;
+	format->u.raw_audio.format = media_raw_audio_format::B_AUDIO_FLOAT;
+	
+	f_info->in_format_count = 1;
+	f_info->in_formats = format;
+
+	format = new media_format;
+	format->type = B_MEDIA_RAW_AUDIO;
+	format->u.raw_audio = media_raw_audio_format::wildcard;
+	format->u.raw_audio.format = media_raw_audio_format::B_AUDIO_FLOAT;
+
+	f_info->out_format_count = 1;
+	f_info->out_formats = format;		
+	
+	*info = f_info;
+	
+	return B_OK;
+}
+
+BMediaNode* 
+VSTAddOn::InstantiateNodeFor(const flavor_info *info, BMessage *config, 
+								  status_t *err) 
+{
+	VSTPlugin *plugin = (VSTPlugin*)fPluginsList.ItemAt(info->internal_id);
+	VSTNode *node = new VSTNode(this, plugin->ModuleName(), plugin->Path());
+	return node;
+}
+
+int
+VSTAddOn::ScanPluginsFolders(const char *path, bool make_dir)
+{
+	BEntry ent;
+
+	BDirectory dir(path);
+	if(dir.InitCheck() != B_OK) {
+		create_directory(path, 0755);
+		return 0;
+	}
+
+	while(dir.GetNextEntry(&ent) == B_OK) {
+		BPath p(&ent);
+		if(ent.IsDirectory()) {
+			ScanPluginsFolders(p.Path());
+		} else {
+			VSTPlugin *plugin = new VSTPlugin();
+			int ret = plugin->LoadModule(p.Path());
+			if(ret == B_OK) {
+				plugin->UnLoadModule();
+				fPluginsList.AddItem(plugin);				
+			} else {
+				delete plugin;
+			}
+		}
+	}
+	return 0;
+}
+
+status_t 
+VSTAddOn::GetConfigurationFor(BMediaNode *node, BMessage *message)
+{
+	return B_OK;
+}
+
+bool
+VSTAddOn::WantsAutoStart()
+{ 
+	return false; 
+}
+
+status_t 	
+VSTAddOn::AutoStart(int count, BMediaNode **node,	int32 *id, bool *more)
+{ 
+	return B_OK; 
+}

src/add-ons/media/media-add-ons/vst_host/VSTAddOn.h

@@ -0,0 +1,30 @@
+/*
+ * Copyright 2012, Gerasim Troeglazov (3dEyes**), 3dEyes@gmail.com. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */
+
+#ifndef __VST_ADDON_H__
+#define __VST_ADDON_H__
+
+#include <MediaAddOn.h>
+#include "VSTHost.h"
+
+class VSTAddOn : public BMediaAddOn 
+{
+public:
+	virtual		 			~VSTAddOn();
+	explicit 				VSTAddOn(image_id image);
+	virtual		status_t 	InitCheck(const char **text);
+	virtual		int32 		CountFlavors();
+	virtual		status_t 	GetFlavorAt(int32 idx, const flavor_info **info);
+	virtual		BMediaNode* InstantiateNodeFor(const flavor_info *info, BMessage *config,	
+							status_t *err);
+	virtual		status_t 	GetConfigurationFor(BMediaNode *node, BMessage *message);
+	virtual		bool 		WantsAutoStart();
+	virtual		status_t 	AutoStart(int count, BMediaNode **node,	int32 *id, bool *more);
+private:	
+				int 		ScanPluginsFolders(const char *path, bool make_dir=false);
+				BList		fPluginsList;
+};
+
+#endif //__VST_ADDON_H__

src/add-ons/media/media-add-ons/vst_host/VSTHost.cpp

@@ -0,0 +1,567 @@
+/*
+ * Copyright 2012, Gerasim Troeglazov (3dEyes**), 3dEyes@gmail.com. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */
+ 
+#include <stdio.h>
+#include <stdlib.h>
+#include <image.h>
+
+#include <Application.h>
+
+#include "VSTHost.h"
+
+static int32 VHostCallback(VSTEffect* effect, int32 opcode, int32 index,
+						   		int32 value, void* ptr, float opt);
+
+//Trim string
+static void
+TrimString(BString *string) {
+	char *str = string->LockBuffer(256);
+    uint32 k = 0;
+    uint32 i = 0;
+    for(i=0; str[i]!='\0';) {
+        if (isspace(str[i])) {
+            k = i;
+            for(uint32 j = i; j < strlen(str) - 1; j++) {
+                str[j] = str[j + 1];
+            }
+            str[strlen(str) - 1] = '\0';
+            i = k;
+        } else {
+            i++;
+        }
+    }
+    string->UnlockBuffer();
+}
+
+//VST Parameter class
+VSTParameter::VSTParameter(VSTPlugin *plugin, int index)
+{
+	fIndex = index;
+	fEffect = plugin->Effect();
+	fDropList.MakeEmpty();
+
+	char temp[256]; 
+  	//get parameter name
+  	temp[0] = 0;
+	fEffect->dispatcher(fEffect, VST_GET_PARAM_NAME, index, 0, temp, 0);
+	fName.SetTo(temp);
+	TrimString(&fName);
+	//get parameter label (unit)
+	temp[0] = 0;
+	fEffect->dispatcher(fEffect, VST_GET_PARAM_UNIT, index, 0, temp, 0);
+	fUnit.SetTo(temp);
+	ValidateValues(&fUnit);
+	//store current value
+	float val = fEffect->getParameter(fEffect, index);
+	//test for minimum value
+	fEffect->setParameter(fEffect, index, 0);
+	temp[0] = 0;
+	fEffect->dispatcher(fEffect, VST_GET_PARAM_STR, index, 0, temp, 0);
+	fMinValue.SetTo(temp);
+	ValidateValues(&fMinValue);
+	//test for maximum value
+	temp[0] = 0;
+	fEffect->setParameter(fEffect, index, 1.0);
+	fEffect->dispatcher(fEffect, VST_GET_PARAM_STR, index, 0, temp, 0);
+	fMaxValue.SetTo(temp);	
+	ValidateValues(&fMaxValue);
+	//test for discrete values
+	char test_disp[VST_PARAM_TEST_COUNT][256];
+	float test_values[VST_PARAM_TEST_COUNT];
+	float delta = 1.0 / (float)VST_PARAM_TEST_COUNT;
+	int test_cnt = 0;
+	for(int tst_val = 0; tst_val < VST_PARAM_TEST_COUNT; tst_val++){
+		float v = (float)tst_val / (float)VST_PARAM_TEST_COUNT;
+		if(tst_val >= VST_PARAM_TEST_COUNT - 1) {
+			v=1.0;
+		}
+		fEffect->setParameter(fEffect, index, v);
+		float new_value = fEffect->getParameter(fEffect, index);
+		bool  valtest = false;
+		for(int i = 0; i < test_cnt; i++) {
+			if(fabs(test_values[i] - new_value) < delta) {
+				valtest = true;
+				break;
+			}
+		}
+		if(valtest == false) {
+			test_values[test_cnt] = new_value;
+			fEffect->dispatcher(fEffect, VST_GET_PARAM_STR, index, 0, test_disp[test_cnt], 0);
+			test_cnt++;
+		}
+	}
+						
+	//restore value
+	fEffect->setParameter(fEffect, index, val);
+		
+	//detect param type
+	if(test_cnt == 2) {
+		fType = VST_PARAM_CHECKBOX;
+		
+		DropListValue *min_item = new DropListValue();
+		min_item->Value = 0.0;
+		min_item->Index = 0;
+		min_item->Name = fMinValue;
+		fDropList.AddItem(min_item);
+		
+		DropListValue *max_item = new DropListValue();
+		max_item->Value = 1.0;
+		max_item->Index = 1;
+		max_item->Name = fMaxValue;
+		fDropList.AddItem(max_item);		
+	} else if(test_cnt > 2 && test_cnt < VST_PARAM_TEST_COUNT / 2) {
+		fType = VST_PARAM_DROPLIST;
+		
+		for(int i = 0; i < test_cnt; i++) {
+			DropListValue *item = new DropListValue();
+			item->Value = test_values[i];
+			item->Index = i;
+			item->Name = test_disp[i];
+			fDropList.AddItem(item);
+		}		
+	} else {
+		fType = VST_PARAM_SLIDER;
+	}
+	fChanged = 0LL;
+}
+
+VSTParameter::~VSTParameter()
+{	
+}
+
+BString*
+VSTParameter::ValidateValues(BString *string)
+{	
+	if(string->Length() == 0) {
+		return string;
+	}
+		
+	bool isNum = true;
+	
+	const char *ptr = string->String();
+	for(;*ptr!=0;ptr++) {
+		char ch = *ptr;
+		if(!((ch >= '0' && ch <= '9') || ch == '.' || ch == '-')) {
+			isNum = false;
+			break;
+		}
+	}
+	
+	if(isNum) {
+		float val = atof(string->String());
+
+		if(val <= -pow(2, 31)) {
+			string->SetTo("-∞");
+		} else if(val >= pow(2, 31)) {
+			string->SetTo("∞");
+		} else {
+			char temp[256];
+			sprintf(temp, "%g", val);
+			string->SetTo(temp);
+		}
+	} else {
+		TrimString(string);
+		if(*string == "oo" || *string == "inf")
+			string->SetTo("∞");
+		if(*string == "-oo" || *string == "-inf")
+			string->SetTo("-∞");
+		
+	}	
+	return string;
+}
+
+int
+VSTParameter::ListCount(void)
+{
+	return fDropList.CountItems();
+}
+
+DropListValue*
+VSTParameter::ListItemAt(int index)
+{
+	DropListValue *item = NULL;
+	if(index >= 0 && index < fDropList.CountItems()) {
+		item = (DropListValue*)fDropList.ItemAt(index);
+	}
+	return item;
+}
+
+
+float
+VSTParameter::Value()
+{	
+	float value = fEffect->getParameter(fEffect, fIndex);
+	if(fType == VST_PARAM_DROPLIST) {
+		//scan for near value
+		int	min_index = 0;
+		float min_delta = 1.0;
+		for(int i = 0; i < fDropList.CountItems(); i++) {
+			DropListValue *item = (DropListValue*)fDropList.ItemAt(i);
+			float delta	= fabs(item->Value - value);
+			if(delta <= min_delta) {
+				min_delta = delta;
+				min_index = i;
+			}
+		}
+		value = min_index;
+	}
+	fLastValue = value;
+	return value;
+}
+
+void
+VSTParameter::SetValue(float value)
+{
+	if(value == fLastValue) {
+		return;
+	}
+	
+	if(fType == VST_PARAM_DROPLIST) {
+		//take value by index
+		int index = (int)round(value);
+		if(index >= 0 && index < fDropList.CountItems()) {
+			DropListValue *item = (DropListValue*)fDropList.ItemAt(index);
+			value = item->Value;
+			fLastValue = index;
+		} else {
+			return;
+		}
+	} else {
+		fLastValue = value;
+	}
+	fChanged = system_time();
+	fEffect->setParameter(fEffect, fIndex, value);
+}
+
+bigtime_t
+VSTParameter::LastChangeTime(void)
+{
+	return fChanged;
+}
+
+const char*
+VSTParameter::MinimumValue(void)
+{
+	return fMinValue.String();
+}
+
+const char*
+VSTParameter::MaximumValue(void)
+{
+	return fMaxValue.String();
+}
+
+const char*
+VSTParameter::Unit(void)
+{
+	return fUnit.String();
+}
+
+int
+VSTParameter::Index(void)
+{
+	return fIndex;
+}
+
+int
+VSTParameter::Type(void)
+{
+	return fType;
+}
+
+const char*
+VSTParameter::Name(void)
+{
+	return fName.String();
+}
+
+//VST Plugin class
+VSTPlugin::VSTPlugin()
+{
+	fActive = false;
+	fEffect = NULL;
+	VSTMainProc = NULL;
+	fInputChannels = 0;
+	fOutputChannels = 0;
+	fSampleRate = 44100.f;
+	fBlockSize = 0;
+	inputs = NULL;
+	outputs = NULL;
+	fParameters.MakeEmpty();
+}
+
+VSTPlugin::~VSTPlugin()
+{
+	fParameters.MakeEmpty();
+	UnLoadModule();
+}
+
+int
+VSTPlugin::LoadModule(const char *path)
+{
+	char effectName[256] = {0};
+	char vendorString[256] = {0};
+	char productString[256] = {0};
+
+	if(fActive) {
+		return VST_ERR_ALREADY_LOADED;
+	}
+
+	fPath = BPath(path);
+	
+	fModule = load_add_on(path);
+	if(fModule <= 0) {
+		return VST_ERR_NOT_LOADED;
+	}
+
+	if(get_image_symbol(fModule, "main_plugin", B_SYMBOL_TYPE_TEXT, (void**)&VSTMainProc) != B_OK) {
+		unload_add_on(fModule);
+		return VST_ERR_NO_MAINPROC;
+	}		
+	
+	fEffect = VSTMainProc(VHostCallback);
+	if(fEffect==NULL) {
+		unload_add_on(fModule);
+		return VST_ERR_NOT_LOADED;
+	}
+	
+	fEffect->dispatcher(fEffect, VST_OPEN, 0, 0, 0, 0);
+		
+	fEffect->dispatcher(fEffect, VST_GET_EFFECT_NAME, 0, 0, effectName, 0);
+	fEffectName.SetTo(effectName);
+	TrimString(&fEffectName);
+	
+	fModuleName.SetTo("VST:");
+	fModuleName.Append(fPath.Leaf());
+	
+	fEffect->dispatcher(fEffect, VST_GET_VENDOR_STR, 0, 0, vendorString, 0);
+	fVendorString.SetTo(vendorString);
+	TrimString(&fVendorString);
+	
+	fEffect->dispatcher(fEffect, VST_GET_PRODUCT_STR, 0, 0, productString, 0);
+	fProductString.SetTo(productString);	
+	TrimString(&fProductString);
+	
+	fInputChannels = fEffect->numInputs;
+	fOutputChannels = fEffect->numOutputs;
+	
+	for(int i=0; i < fEffect->numParams; i++) {
+		VSTParameter *param = new VSTParameter(this, i);
+		fParameters.AddItem(param);
+	}
+	
+	fEffect->dispatcher(fEffect, VST_STATE_CHANGED, 0, 1, 0, 0);
+	
+	ReAllocBuffers();
+	
+	fActive = true;
+	return B_OK;
+}
+
+int
+VSTPlugin::UnLoadModule(void)
+{
+	if(!fActive || fModule <= 0) {
+		return VST_ERR_NOT_LOADED;
+	}
+	fEffect->dispatcher(fEffect, VST_STATE_CHANGED, 0, 0, 0, 0);
+	fEffect->dispatcher(fEffect, VST_CLOSE, 0, 0, 0, 0);
+	
+	unload_add_on(fModule);
+	
+	return B_OK;
+}
+
+int
+VSTPlugin::Channels(int mode)
+{
+	switch(mode) {
+		case VST_INPUT_CHANNELS:
+			return fInputChannels;
+		case VST_OUTPUT_CHANNELS:
+			return fOutputChannels;
+		default:
+			return 0;
+	}	
+}
+
+int
+VSTPlugin::SetSampleRate(float rate)
+{
+	fSampleRate = rate;
+	fEffect->dispatcher(fEffect, VST_SET_SAMPLE_RATE, 0, 0, 0, rate);
+	return B_OK;
+}
+
+float
+VSTPlugin::SampleRate(void)
+{
+	return fSampleRate;
+}
+
+int
+VSTPlugin::SetBlockSize(size_t size)
+{
+	fBlockSize = size;
+	fEffect->dispatcher(fEffect, VST_SET_BLOCK_SIZE, 0, size, 0, 0);
+	ReAllocBuffers();
+	return B_OK;
+}
+
+const char*
+VSTPlugin::Path(void)
+{
+	return fPath.Path();
+}
+
+int
+VSTPlugin::ReAllocBuffers(void)
+{
+	if(inputs!=NULL) {
+		for(int32 i = 0; i < fInputChannels; i++)	{
+			delete inputs[i];
+		}		
+	}
+	
+	if(outputs!=NULL) {
+		for(int32 i = 0; i < fOutputChannels; i++)	{
+			delete outputs[i];
+		}		
+	}
+	
+	if(fInputChannels > 0) {
+		inputs = new float*[fInputChannels];
+		for(int32 i = 0; i < fInputChannels; i++)	{
+			inputs[i] = new float[fBlockSize]; 
+			memset (inputs[i], 0, fBlockSize * sizeof(float)); 
+		}
+	} 
+ 
+	if(fOutputChannels > 0) { 
+		outputs = new float*[fOutputChannels];
+		for(int32_t i = 0; i < fOutputChannels; i++) {
+			outputs[i] = new float[fBlockSize];
+			memset (outputs[i], 0, fBlockSize * sizeof(float));
+		}
+	}
+	return B_OK;
+}
+
+size_t
+VSTPlugin::BlockSize(void)
+{
+	return fBlockSize;
+}
+
+int
+VSTPlugin::ParametersCount(void)
+{
+	return fParameters.CountItems();
+}
+
+VSTParameter*
+VSTPlugin::Parameter(int index)
+{
+	VSTParameter *param = NULL;
+	
+	if(index >= 0 && index < fParameters.CountItems()) {
+		param = (VSTParameter*)fParameters.ItemAt(index);
+	}
+	
+	return param;
+}
+
+VSTEffect*
+VSTPlugin::Effect(void)
+{
+	return fEffect;
+}
+
+const char*
+VSTPlugin::EffectName(void)
+{
+	return fEffectName.String();
+}
+
+const char*
+VSTPlugin::ModuleName(void)
+{
+	return fModuleName.String();
+}
+
+const char*
+VSTPlugin::Vendor(void)
+{
+	return fVendorString.String();
+}
+
+const char*
+VSTPlugin::Product(void)
+{
+	return fProductString.String();
+}
+
+
+void
+VSTPlugin::Process(float *buffer, int samples, int channels)
+{	
+	//todo: full channels remapping needed
+	float *src = buffer;
+	
+	if(channels == fInputChannels) { //channel to channel
+		for(int j = 0; j < samples; j++) {
+			for(int c = 0; c < fInputChannels; c++) {
+				inputs[c][j] = *src++;
+			}
+		}
+	} else if( channels == 1) {	//from mone to multichannel
+		for(int j = 0; j < samples; j++, src++) {
+			for(int c = 0; c < fInputChannels; c++) {
+				inputs[c][j] = *src;
+			}
+		}
+	}
+		
+	fEffect->processReplacing(fEffect, inputs, outputs, fBlockSize);
+	
+	float *dst = buffer;
+	
+	if(channels == fOutputChannels) { //channel to channel
+		for(int j = 0; j < samples; j++) {
+			for(int c = 0; c < fOutputChannels; c++) {				
+				*dst++ = outputs[c][j];
+			}	
+		}
+	} else if(channels == 1) {  //from multichannel to mono
+		for(int j = 0; j < samples; j++, dst++) {
+			float mix = 0;
+			for(int c = 0; c < fOutputChannels; c++) {				
+				mix += outputs[c][j];
+			}	
+			*dst = mix / (float)fOutputChannels;
+		}		
+	}
+}
+
+static int32 
+VHostCallback(VSTEffect* effect, int32 opcode, int32 index, int32 value, void* ptr, float opt)
+{
+	intptr_t result = 0;
+ 
+	switch(opcode)
+	{
+		case VST_MASTER_PRODUCT:
+			if(ptr) {
+				strcpy((char*)ptr, "VSTHost Media AddOn");
+				result = 1;
+			}
+			break;		 
+		case VST_MASTER_VERSION :
+			result = 2300;
+			break;
+	}
+
+	return result;
+}

src/add-ons/media/media-add-ons/vst_host/VSTHost.h

@@ -0,0 +1,169 @@
+/*
+ * Copyright 2012, Gerasim Troeglazov (3dEyes**), 3dEyes@gmail.com. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */
+ 
+#ifndef __VST_HOST_H__
+#define __VST_HOST_H__
+
+#include <String.h>
+#include <Entry.h>
+#include <Directory.h>
+#include <Path.h>
+#include <List.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <image.h>
+#include <string.h>
+#include <ctype.h>
+
+#define VST_PARAM_TEST_COUNT 	100
+
+//error codes
+#define VST_ERR_ALREADY_LOADED 	-1
+#define VST_ERR_NOT_LOADED 		-2
+#define VST_ERR_NO_MAINPROC 	-3
+
+//param types
+#define VST_PARAM_SLIDER	1
+#define VST_PARAM_CHECKBOX  2
+#define VST_PARAM_DROPLIST  3
+
+//channels
+#define VST_INPUT_CHANNELS	1
+#define VST_OUTPUT_CHANNELS	2
+
+//vst callback opcodes
+#define VST_MASTER_AUTOMATE 0x00
+#define VST_MASTER_VERSION 	0x01
+#define VST_MASTER_IDLE 	0x03
+#define VST_MASTER_VENDOR 	0x20
+#define VST_MASTER_PRODUCT	0x21
+
+//vst actions
+#define VST_OPEN			0x00
+#define VST_CLOSE			0x01
+#define	VST_GET_PARAM_UNIT	0x06
+#define VST_GET_PARAM_STR 	0x07
+#define VST_GET_PARAM_NAME	0x08
+#define VST_SET_SAMPLE_RATE	0x0A
+#define VST_SET_BLOCK_SIZE	0x0B
+#define VST_STATE_CHANGED 	0x0C
+#define VST_GET_EFFECT_NAME	0x2D
+#define VST_GET_VENDOR_STR	0x2F
+#define VST_GET_PRODUCT_STR 0x30
+#define VST_GET_VENDOR_VER	0x31
+
+//vst plugin structure
+struct VSTEffect
+{
+		int 			cookie;
+		int32 			(*dispatcher)(struct VSTEffect*, int32, int32, int32, void*, float);
+		void 			(*process)(struct VSTEffect*, float**, float**, int32);
+		void 			(*setParameter)(struct VSTEffect*, int32, float);
+		float 			(*getParameter)(struct VSTEffect*, int32);
+		int32 			numPrograms;
+		int32 			numParams;
+		int32 			numInputs;
+		int32 			numOutputs;
+		int32 			flags;
+		void*			_notused_pointer1;
+		void*			_notused_pointer2;
+		char 			_notused_block1[12];
+		float 			_notused_float;
+		void*			_notused_pointer3;
+		void*			_notused_pointer4;
+		int32 			ID;
+		char 			_notused_block2[4];
+		void 			(*processReplacing)(struct VSTEffect*, float**, float**, int);
+};
+
+//typedefs
+typedef int32			(*audioMasterCallback)(VSTEffect*, int32, int32, int32, void*, float);
+typedef VSTEffect* 		(*VSTEntryProc)(audioMasterCallback audioMaster);
+inline 	float 			round(float x) {return ceil(x-0.5);}
+
+//structure for droplist parameters
+struct  DropListValue {
+		int				Index;
+		float 			Value;
+		BString 		Name;
+};
+
+class VSTPlugin;
+//vst parameter class adapter
+class VSTParameter {
+public:
+						VSTParameter(VSTPlugin* plugin, int index);
+						~VSTParameter();
+		float			Value(void);
+		void			SetValue(float value);
+		const char*		MinimumValue(void);
+		const char*		MaximumValue(void);
+		const char*		Unit(void);
+		int				Index(void);
+		int				Type(void);
+		const char*		Name(void);
+		int				ListCount(void);
+		DropListValue*	ListItemAt(int index);
+		bigtime_t		LastChangeTime(void);
+private:
+		BString*		ValidateValues(BString *string);
+		VSTPlugin* 		fPlugin;
+		VSTEffect*		fEffect;
+		int				fIndex;
+		int				fType;
+		BString			fName;
+		BString			fUnit;
+		BString			fMinValue;
+		BString			fMaxValue;
+		BList			fDropList;
+		bigtime_t		fChanged;
+		float			fLastValue;
+};
+
+//vst plugin interface
+class VSTPlugin {
+public:	
+						VSTPlugin();
+						~VSTPlugin();
+		int				LoadModule(const char *path);
+		int 			UnLoadModule(void);
+		int				SetSampleRate(float rate);
+		float			SampleRate(void);
+		int 			SetBlockSize(size_t size);
+		const char*		Path(void);
+		size_t			BlockSize(void);
+		VSTEffect*		Effect(void);
+		const char*		EffectName(void);
+		const char*		ModuleName(void);
+		const char*		Vendor(void);
+		const char*		Product(void);
+		int				ParametersCount(void);
+		VSTParameter*	Parameter(int index);
+		int				Channels(int mode);
+		int				ReAllocBuffers(void);
+		void			Process(float *buffer, int samples, int channels);
+private:		
+		VSTEntryProc 	GetMainEntry();
+		VSTEffect*		fEffect;
+		VSTEntryProc	VSTMainProc;
+		bool			fActive;		
+		image_id 		fModule;
+		BPath			fPath;
+		size_t			fBlockSize;
+		float			fSampleRate;
+		int				fInputChannels;
+		int				fOutputChannels;
+		BString			fModuleName;
+		BString			fEffectName;
+		BString			fVendorString;
+		BString			fProductString;
+		BList			fParameters;
+		float			**inputs;
+		float			**outputs;
+};
+
+#endif //__VST_HOST_H__

src/add-ons/media/media-add-ons/vst_host/VSTHost.rdef

@@ -0,0 +1,15 @@
+/*
+ * VSTHost.rdef
+ */
+
+resource app_signature "application/x-vnd.vst_host.media_addon";
+
+resource app_version {
+	major  = 0,
+	middle = 0,
+	minor  = 2,
+	variety = 0,
+	internal = 0,
+	short_info = "0.0.2",
+	long_info = "VST Loader media add-on."
+};

src/add-ons/media/media-add-ons/vst_host/VSTNode.cpp

@@ -0,0 +1,802 @@
+/*
+ * Copyright 2012, Gerasim Troeglazov (3dEyes**), 3dEyes@gmail.com. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */ 
+
+#include <ByteOrder.h>
+#include <Buffer.h>
+#include <BufferGroup.h>
+#include <TimeSource.h>
+#include <ParameterWeb.h>
+#include <String.h>
+
+#include <stdio.h>
+#include <string.h>
+
+#include "VSTNode.h"
+
+//VSTNode
+VSTNode::~VSTNode() {
+	Quit();
+}
+
+VSTNode::VSTNode(BMediaAddOn* addon, const char *name, const char* path) : BMediaNode(name),
+				BBufferConsumer(B_MEDIA_RAW_AUDIO),
+				BBufferProducer(B_MEDIA_RAW_AUDIO),
+				BControllable(),
+				BMediaEventLooper(),
+				fAddOn(addon),
+				fOutputMediaEnabled(true),
+				fDownstreamLatency(0),
+				fProcessLatency(0)
+{
+	fPlugin = new VSTPlugin();
+	fPlugin->LoadModule(path);
+}
+
+//BMediaNode
+BMediaAddOn* VSTNode::AddOn(int32 *id) const 
+{
+	if(fAddOn) {
+		*id = 0;
+	}
+	return fAddOn;
+}
+
+status_t 
+VSTNode::HandleMessage(int32 message, const void *data, size_t size)
+{
+	if((BControllable::HandleMessage(message, data, size)!=B_OK) &&
+		(BBufferConsumer::HandleMessage(message, data, size) != B_OK) &&
+		(BBufferProducer::HandleMessage(message, data, size) != B_OK) &&
+		(BControllable::HandleMessage(message, data, size) != B_OK) ) {
+   			BMediaNode::HandleMessage(message, data, size);
+		return B_OK;
+	} else {
+		BMediaNode::HandleBadMessage(message, data, size);
+		return B_ERROR;		
+	}	
+}
+
+void
+VSTNode::NodeRegistered()
+{
+	SetPriority(B_REAL_TIME_PRIORITY);
+	Run();
+
+	fPreferredFormat.type = B_MEDIA_RAW_AUDIO;
+	fPreferredFormat.u.raw_audio.buffer_size = BUFF_SIZE;
+	fPreferredFormat.u.raw_audio = media_raw_audio_format::wildcard;
+	fPreferredFormat.u.raw_audio.channel_count = media_raw_audio_format::wildcard.channel_count;
+	fPreferredFormat.u.raw_audio.format = media_raw_audio_format::B_AUDIO_FLOAT;
+		
+	fFormat.type = B_MEDIA_RAW_AUDIO;
+	fFormat.u.raw_audio = media_raw_audio_format::wildcard;
+	
+	fInputMedia.destination.port = ControlPort();
+	fInputMedia.destination.id = ID_AUDIO_INPUT;
+	fInputMedia.node = Node();
+	fInputMedia.source = media_source::null;
+	fInputMedia.format = fFormat;
+	strncpy(fInputMedia.name, "Audio Input", B_MEDIA_NAME_LENGTH);
+
+	fOutputMedia.source.port = ControlPort();
+	fOutputMedia.source.id = ID_AUDIO_OUTPUT;
+	fOutputMedia.node = Node();
+	fOutputMedia.destination = media_destination::null;
+	fOutputMedia.format = fFormat;
+	strncpy(fOutputMedia.name, "Audio Output", B_MEDIA_NAME_LENGTH);
+
+	InitParameterValues();
+	InitParameterWeb();
+}
+
+//BControllable
+status_t 
+VSTNode::GetParameterValue(int32 id, bigtime_t *lastChangeTime, void *value, size_t *size)
+{
+	if(*size < sizeof(float) ||
+	   *size < sizeof(int32)) {
+		return B_NO_MEMORY;
+	}
+
+	type_code v_type = B_FLOAT_TYPE;
+	
+	BParameter *param;	
+	for(int i = 0; i < fWeb->CountParameters(); i++) {
+		param = fWeb->ParameterAt(i);
+		if(param->ID() == id) {
+			v_type = param->ValueType();
+			break;
+		}
+	}	
+
+	*size = sizeof(float);
+
+	if(id == P_MUTE) {
+		*(int32*)value = fMute;
+		*lastChangeTime = fMuteLastChanged;
+		return B_OK;
+	} else if(id == P_BYPASS) {
+		*(int32*)value = fByPass;
+		*lastChangeTime = fByPassLastChanged;
+		return B_OK;
+	} else {
+		int32 idx = id - P_PARAM;
+		if(idx >= 0 && idx < fPlugin->ParametersCount()) {
+			VSTParameter *param = fPlugin->Parameter(idx);
+			if(v_type == B_FLOAT_TYPE) {
+				*(float*)value = param->Value();
+			}
+			if(v_type == B_INT32_TYPE) {
+				*(int32*)value = (int32)ceil(param->Value());
+			}
+			*lastChangeTime = param->LastChangeTime();
+			return B_OK;
+		}
+	}		
+	return B_ERROR;
+}
+
+void
+VSTNode::SetParameterValue(int32 id, bigtime_t time, const void *value, size_t size)
+{		
+	int32 idx = id - P_PARAM;
+	if((idx >= 0 && idx < fPlugin->ParametersCount()) || id == P_MUTE || id == P_BYPASS) {
+		media_timed_event ev(time, BTimedEventQueue::B_PARAMETER, (void*)value,
+			BTimedEventQueue::B_NO_CLEANUP, size, id, "VSTParam");				
+		ParameterEventProcessing(&ev);	//dirty hack for parameter processing (mediakit bug????)					
+		EventQueue()->AddEvent(ev);		
+	}
+}
+
+//BBufferConsumer
+void
+VSTNode::BufferReceived(BBuffer *buffer)
+{
+	if(buffer->Header()->destination != fInputMedia.destination.id) {
+		buffer->Recycle();
+		return;
+	}
+
+	if(fOutputMedia.destination == media_destination::null || !fOutputMediaEnabled) {
+		buffer->Recycle();
+		return;
+	}
+
+	FilterBuffer(buffer);
+
+	status_t err = SendBuffer(buffer, fOutputMedia.source, fOutputMedia.destination);
+	if (err < B_OK) {
+		buffer->Recycle();
+	}
+}
+
+status_t 
+VSTNode::AcceptFormat(const media_destination &dst, media_format *format)
+{
+	if(dst != fInputMedia.destination) {
+		return B_MEDIA_BAD_DESTINATION;
+	}
+	if(format->type != B_MEDIA_RAW_AUDIO) {
+		return B_MEDIA_BAD_FORMAT;
+	}
+
+	ValidateFormat((fFormat.u.raw_audio.format != media_raw_audio_format::wildcard.format) ?
+			fFormat : fPreferredFormat, *format);
+			
+	return B_OK;
+}
+
+status_t 
+VSTNode::GetNextInput(int32* cookie, media_input* input)
+{
+	if(*cookie) {
+		return B_BAD_INDEX;
+	}
+	++*cookie;
+	*input = fInputMedia;
+	return B_OK;
+}
+
+void 
+VSTNode::DisposeInputCookie(int32 cookie)
+{
+}
+
+status_t 
+VSTNode::FormatChanged(const media_source &src, const media_destination &dst,
+							int32 changeTag, const media_format &format)
+{
+	return B_MEDIA_BAD_FORMAT;
+}
+
+void 
+VSTNode::ProducerDataStatus(const media_destination &dst, int32 status, bigtime_t when)
+{
+	if(fOutputMedia.destination != media_destination::null) {
+		SendDataStatus(status, fOutputMedia.destination, when);
+	}
+}
+
+status_t 
+VSTNode::GetLatencyFor( const media_destination &dst, bigtime_t *latency, 
+							media_node_id* outTimeSource)
+{
+
+	if(dst != fInputMedia.destination) {
+		return B_MEDIA_BAD_DESTINATION;
+	}
+
+	*latency = fDownstreamLatency + fProcessLatency;
+	*outTimeSource = TimeSource()->ID();
+	return B_OK;
+}
+
+status_t
+VSTNode::Connected(const media_source& source,
+	const media_destination& destination, const media_format& format,
+	media_input* poInput)
+{
+	if(destination != fInputMedia.destination) {
+		return B_MEDIA_BAD_DESTINATION;
+	}
+	if(fInputMedia.source != media_source::null) {
+		return B_MEDIA_ALREADY_CONNECTED;
+	}
+
+	fInputMedia.source = source;
+	fInputMedia.format = format;
+	*poInput = fInputMedia;
+	fFormat = format;
+
+	return B_OK;
+}
+
+void 
+VSTNode::Disconnected(const media_source &src, const media_destination &dst)
+{
+	if(fInputMedia.source!=src || dst!=fInputMedia.destination) {
+		return;
+	}
+	fInputMedia.source = media_source::null;
+	if(fOutputMedia.destination == media_destination::null) {
+		fFormat.u.raw_audio = media_raw_audio_format::wildcard;
+	}
+	fInputMedia.format = fFormat;
+}
+
+//BBufferProducer
+status_t 
+VSTNode::FormatSuggestionRequested(media_type type, int32 quality,	media_format *format) 
+{
+	if(type != B_MEDIA_RAW_AUDIO) {
+		return B_MEDIA_BAD_FORMAT;
+	}
+
+	if(fFormat.u.raw_audio.format != media_raw_audio_format::wildcard.format) {
+		*format = fFormat;	
+	} else {
+		*format = fPreferredFormat;
+	}
+	return B_OK;
+}
+
+status_t 
+VSTNode::FormatProposal(const media_source &src, media_format* format)
+{
+	if(src != fOutputMedia.source) {
+		return B_MEDIA_BAD_SOURCE;
+	}
+
+	if(format->type != B_MEDIA_RAW_AUDIO) {
+		return B_MEDIA_BAD_FORMAT;
+	}
+
+	ValidateFormat((fFormat.u.raw_audio.format != media_raw_audio_format::wildcard.format) ?
+			fFormat : fPreferredFormat, *format);
+
+	return B_OK;
+}
+
+status_t 
+VSTNode::FormatChangeRequested(const media_source &src, const media_destination &dst,
+						media_format* format, int32* _deprecated_)
+{
+	return B_MEDIA_BAD_FORMAT;
+}
+
+void 
+VSTNode::LateNoticeReceived(const media_source &src, bigtime_t late, bigtime_t when)
+{
+	if(src != fOutputMedia.source || fInputMedia.source == media_source::null) {
+		return;
+	}	
+	NotifyLateProducer(	fInputMedia.source,	late, when);
+}
+
+status_t
+VSTNode::GetNextOutput(int32 *cookie, media_output* output)
+{
+	if(*cookie) {
+		return B_BAD_INDEX;
+	}
+	++*cookie;
+	*output = fOutputMedia;
+	return B_OK;
+}
+
+status_t 
+VSTNode::DisposeOutputCookie(int32 cookie) 
+{
+	return B_OK;
+}
+
+status_t
+VSTNode::SetBufferGroup(const media_source &src, BBufferGroup *group)
+{
+	int32 changeTag;
+
+	if(src != fOutputMedia.source) {
+		return B_MEDIA_BAD_SOURCE;
+	}
+	if(fInputMedia.source == media_source::null) {
+		return B_ERROR;
+	}
+
+	return SetOutputBuffersFor(fInputMedia.source, fInputMedia.destination, group,	0, &changeTag);
+}
+
+status_t
+VSTNode::PrepareToConnect( const media_source &src, const media_destination &dst,
+							media_format *format, media_source *out_source, char *name)
+{
+	if(src != fOutputMedia.source) {
+		return B_MEDIA_BAD_SOURCE;
+	}
+
+	if(format->type != B_MEDIA_RAW_AUDIO) {
+		return B_MEDIA_BAD_FORMAT;
+	}
+	
+	if(fOutputMedia.destination != media_destination::null) {
+		return B_MEDIA_ALREADY_CONNECTED;
+	}
+
+	status_t err = ValidateFormat((fFormat.u.raw_audio.format != media_raw_audio_format::wildcard.format) ?
+		fFormat : fPreferredFormat, *format);
+	
+	if(err < B_OK) {
+		return err;
+	}
+
+	SetOutputFormat(*format);
+
+	fOutputMedia.destination = dst;
+	fOutputMedia.format = *format;
+
+	*out_source = fOutputMedia.source;
+	strncpy(name, fOutputMedia.name, B_MEDIA_NAME_LENGTH);
+
+	return B_OK;
+}
+
+void
+VSTNode::Connect(status_t status, const media_source &src,	const media_destination &dst,
+						const media_format &format, char *name)
+{
+	status_t err;
+	if(status < B_OK) {
+		fOutputMedia.destination = media_destination::null;
+		return;
+	}
+
+	strncpy(name, fOutputMedia.name, B_MEDIA_NAME_LENGTH);
+	fOutputMedia.destination = dst;
+	fFormat = format;
+
+	media_node_id timeSource;
+	err = FindLatencyFor(fOutputMedia.destination, &fDownstreamLatency, &timeSource);
+	
+	InitFilter();
+
+	fProcessLatency = GetFilterLatency();
+	SetEventLatency(fDownstreamLatency + fProcessLatency);
+
+	if(fInputMedia.source != media_source::null) {
+		SendLatencyChange(fInputMedia.source, fInputMedia.destination, 
+							EventLatency()+SchedulingLatency());
+	}
+
+	bigtime_t duration = 0;
+	
+	int sample_size = (fFormat.u.raw_audio.format & 0xf)*
+						fFormat.u.raw_audio.channel_count;
+	if(fFormat.u.raw_audio.buffer_size > 0 &&
+		fFormat.u.raw_audio.frame_rate > 0 &&
+		sample_size > 0) {
+			duration = (bigtime_t)(((fFormat.u.raw_audio.buffer_size / sample_size) /
+									fFormat.u.raw_audio.frame_rate) * 1000000.0);
+	}
+			
+	SetBufferDuration(duration);
+}
+
+void 
+VSTNode::Disconnect(const media_source &src, const media_destination &dst) 
+{
+	if(src != fOutputMedia.source) {
+		return;
+	}
+
+	if(dst != fOutputMedia.destination) {
+		return;
+	}
+
+	fOutputMedia.destination = media_destination::null;
+
+	if(fInputMedia.source == media_source::null) {
+		fFormat.u.raw_audio = media_raw_audio_format::wildcard;
+	}
+
+	fOutputMedia.format = fFormat;
+}
+
+void 
+VSTNode::EnableOutput(const media_source &src, bool enabled, int32* _deprecated_)
+{
+	if(src != fOutputMedia.source) {
+		return;
+	}
+	fOutputMediaEnabled = enabled;
+}
+
+status_t 
+VSTNode::GetLatency(bigtime_t *latency)
+{
+	*latency = EventLatency() + SchedulingLatency();
+	return B_OK;
+}
+
+void 
+VSTNode::LatencyChanged(const media_source &src, const media_destination &dst,
+						bigtime_t latency, uint32 flags)
+{
+	if(src != fOutputMedia.source || dst != fOutputMedia.destination) {
+		return;
+	}
+
+	fDownstreamLatency = latency;
+	SetEventLatency(fDownstreamLatency + fProcessLatency);
+
+	if(fInputMedia.source != media_source::null) {
+		SendLatencyChange(fInputMedia.source, 
+			fInputMedia.destination,EventLatency() + SchedulingLatency());
+	}
+}
+
+//BMediaEventLooper
+bigtime_t 
+VSTNode::OfflineTime()
+{
+	return 0LL;
+}
+
+//VSTNode
+void
+VSTNode::HandleEvent(const media_timed_event *event, bigtime_t late, bool realTime)
+{	
+	if(event->type == BTimedEventQueue::B_PARAMETER) {
+		ParameterEventProcessing(event);
+	}
+}
+
+void 
+VSTNode::ParameterEventProcessing(const media_timed_event* event)
+{
+	float value = 0.0;
+	int32 value32 = 0;
+	
+	int32 id = event->bigdata;
+	size_t size = event->data;
+	bigtime_t now = TimeSource()->Now();
+	
+	type_code v_type = B_FLOAT_TYPE;
+	
+	BParameter *web_param;	
+	for(int i = 0; i < fWeb->CountParameters(); i++) {
+		web_param = fWeb->ParameterAt(i);
+		if(web_param->ID()==id) {
+			v_type=web_param->ValueType();
+			break;
+		}
+	}
+	
+	if(v_type == B_FLOAT_TYPE)
+		value = *((float*)event->pointer);
+	if(v_type == B_INT32_TYPE) {		
+		value32 = *((int32*)event->pointer);
+		value = (float)value32;
+	}
+
+	if(id == P_MUTE) {
+		fMute = value32;
+		fMuteLastChanged = now;
+		BroadcastNewParameterValue(now,	id,	event->pointer, size);
+	} else if(id == P_BYPASS) {
+		fByPass = value32;
+		fByPassLastChanged = now;
+		BroadcastNewParameterValue(now,	id,	event->pointer, size);
+	} else {
+		int32 idx = id - P_PARAM;
+		if(idx >= 0 && idx < fPlugin->ParametersCount()) {
+			VSTParameter *param = fPlugin->Parameter(idx);
+			param->SetValue(value);
+			BroadcastNewParameterValue(now,	id,	&value,	size);
+		}
+	}
+}
+
+status_t
+VSTNode::ValidateFormat(const media_format &preferredFormat,
+							media_format &proposedFormat)
+{
+	status_t ret = B_OK;
+		
+	if(proposedFormat.type != B_MEDIA_RAW_AUDIO) {
+		proposedFormat = preferredFormat;
+		return B_MEDIA_BAD_FORMAT;
+	}
+
+	media_raw_audio_format &wild = media_raw_audio_format::wildcard;
+	media_raw_audio_format &f = proposedFormat.u.raw_audio;
+	const media_raw_audio_format &pref = preferredFormat.u.raw_audio;
+
+	if(pref.frame_rate != wild.frame_rate && f.frame_rate != pref.frame_rate) {
+		if(f.frame_rate != wild.frame_rate) {
+			ret = B_MEDIA_BAD_FORMAT;
+		}
+		f.frame_rate = pref.frame_rate;
+	}
+
+	if(pref.channel_count != wild.channel_count && f.channel_count != pref.channel_count) {
+		if(f.channel_count != wild.channel_count) {
+			ret = B_MEDIA_BAD_FORMAT;
+		}
+		f.channel_count = pref.channel_count;
+	}
+
+	if(pref.format != wild.format && f.format != pref.format) {
+		if(f.format != wild.format) {
+			ret = B_MEDIA_BAD_FORMAT;
+		}
+		f.format = pref.format;
+	}
+
+	if(pref.byte_order != wild.byte_order && f.byte_order != pref.byte_order) {
+		if(f.byte_order != wild.byte_order) {
+			ret = B_MEDIA_BAD_FORMAT;
+		}
+		f.byte_order = pref.byte_order;
+	}
+
+	if(pref.buffer_size != wild.buffer_size && f.buffer_size != pref.buffer_size) {
+		if(f.buffer_size != wild.buffer_size) {
+			ret = B_MEDIA_BAD_FORMAT;
+		}
+		f.buffer_size = pref.buffer_size;
+	}
+	
+	return ret;
+}
+
+
+void
+VSTNode::SetOutputFormat(media_format &format)
+{
+	media_raw_audio_format &f = format.u.raw_audio;
+	media_raw_audio_format &w = media_raw_audio_format::wildcard;
+
+	if(f.frame_rate == w.frame_rate) {
+		f.frame_rate = 44100.0;
+	}
+	if(f.channel_count == w.channel_count) {
+		if(fInputMedia.source != media_source::null) {
+			f.channel_count = fInputMedia.format.u.raw_audio.channel_count;
+		} else {
+			f.channel_count = fPlugin->Channels(VST_OUTPUT_CHANNELS);
+		}
+	}
+	if(f.format == w.format) {
+		f.format = media_raw_audio_format::B_AUDIO_FLOAT;
+	}
+	if(f.byte_order == w.format) {
+		f.byte_order = (B_HOST_IS_BENDIAN)?B_MEDIA_BIG_ENDIAN:B_MEDIA_LITTLE_ENDIAN;
+	}
+	if(f.buffer_size == w.buffer_size) {
+		f.buffer_size = BUFF_SIZE;
+	}
+}
+
+void 
+VSTNode::InitParameterValues()
+{	
+	fMute = 0;
+	fByPass = 0;
+	fMuteLastChanged = 0LL;
+	fByPassLastChanged = 0LL;
+}
+
+void 
+VSTNode::InitParameterWeb()
+{
+	fWeb = new BParameterWeb();
+
+	bool switch_group_needed = false;
+	for(int i = 0; i < fPlugin->ParametersCount(); i++) {
+		VSTParameter *param = fPlugin->Parameter(i);
+		if(param->Type() == VST_PARAM_CHECKBOX ||
+		   param->Type() == VST_PARAM_DROPLIST) {
+		   switch_group_needed = true;
+		   break;
+		}
+	}
+
+	BParameterGroup *fParamGroup = fWeb->MakeGroup("Parameters");	
+	BParameterGroup *fSwitchesGroup = switch_group_needed?fWeb->MakeGroup("Switches"):NULL;
+	BParameterGroup *fAboutGroup = fWeb->MakeGroup("About");
+
+	BParameter *value;
+	BNullParameter *label;
+	BParameterGroup *group;
+
+	BParameterGroup *fFControlGroup = fParamGroup->MakeGroup("FilterControl");
+	BParameterGroup *fCheckBoxGroup = switch_group_needed?fSwitchesGroup->MakeGroup("CheckBoxes") : NULL;
+	BParameterGroup *fSelectorsGroup = switch_group_needed?fSwitchesGroup->MakeGroup("Selectors") : NULL;
+	
+	fFControlGroup->MakeDiscreteParameter(P_MUTE, B_MEDIA_NO_TYPE,"Mute", B_ENABLE);
+	fFControlGroup->MakeDiscreteParameter(P_BYPASS, B_MEDIA_NO_TYPE,"ByPass", B_ENABLE);
+	
+	for(int i = 0; i < fPlugin->ParametersCount(); i++) {
+		VSTParameter *param = fPlugin->Parameter(i);
+		switch(param->Type()) {
+			case VST_PARAM_CHECKBOX:
+			{
+				BString str;
+				str << param->Name() << " (" << param->MinimumValue() << "/" << param->MaximumValue() << ")";
+				value = fCheckBoxGroup->MakeDiscreteParameter(P_PARAM + param->Index(), 
+												B_MEDIA_NO_TYPE, str.String(), B_ENABLE);
+				break;
+ 			}
+			case VST_PARAM_DROPLIST:
+			{
+				BDiscreteParameter *dvalue = fSelectorsGroup->MakeDiscreteParameter(P_PARAM + param->Index(),
+											 	B_MEDIA_NO_TYPE, param->Name(), B_OUTPUT_MUX);
+				for(int j = 0; j < param->ListCount(); j++) {
+					dvalue->AddItem( param->ListItemAt(j)->Index, param->ListItemAt(j)->Name.String());
+				}
+				break;
+			}
+			//sliders
+			default:
+			{
+				BString str;
+				group = fParamGroup->MakeGroup(param->Name());
+				label = group->MakeNullParameter(P_LABEL + param->Index(), 
+								B_MEDIA_NO_TYPE, param->Name(), B_GENERIC);
+			
+				str.SetTo(param->MaximumValue());
+				str << " " << param->Unit();
+				
+				group->MakeNullParameter(P_LABEL2 + param->Index(), 
+								B_MEDIA_NO_TYPE, str.String(), B_GENERIC);			
+				value = group->MakeContinuousParameter(P_PARAM + param->Index(), 
+								B_MEDIA_NO_TYPE, "", B_GAIN, "", 0.0, 1.0, 0.01);
+				label->AddOutput(value);
+				value->AddInput(label);
+			
+				str.SetTo(param->MinimumValue());
+				str << " " << param->Unit();
+				
+				group->MakeNullParameter(P_LABEL3 + param->Index(), 
+								B_MEDIA_NO_TYPE, str.String(), B_GENERIC);
+				break;
+			}
+		}		
+	}
+	
+	BString str("About plugin");
+	label = fAboutGroup->MakeNullParameter(P_ABOUT + 0, 
+						B_MEDIA_NO_TYPE, str.String(), B_GENERIC);	
+
+	str.SetTo("Effect name: ");
+	if(strlen(fPlugin->EffectName()) != 0) {
+		str.Append(fPlugin->EffectName());
+	} else {
+		str.Append("not specified");
+	}	
+	label = fAboutGroup->MakeNullParameter(P_ABOUT + 1, 
+						B_MEDIA_NO_TYPE, str.String(), B_GENERIC);
+	
+	str.SetTo("Vendor: ");
+	if(strlen(fPlugin->Vendor()) != 0) {
+		str.Append(fPlugin->Vendor());
+	} else {
+		str.Append("not specified");
+	}		
+	label = fAboutGroup->MakeNullParameter(P_ABOUT + 2, 
+						B_MEDIA_NO_TYPE, str.String(), B_GENERIC);
+	
+	str.SetTo("Product: ");
+	if(strlen(fPlugin->Product()) != 0) {
+		str.Append(fPlugin->Product());
+	} else {
+		str.Append("not specified");
+	}
+	label = fAboutGroup->MakeNullParameter(P_ABOUT + 3,
+						B_MEDIA_NO_TYPE, str.String(), B_GENERIC);
+
+	str.SetTo("Input Channels: ");
+	str<<fPlugin->Channels(VST_INPUT_CHANNELS);
+	label = fAboutGroup->MakeNullParameter(P_ABOUT + 4,
+						B_MEDIA_NO_TYPE, str.String(), B_GENERIC);
+
+	str.SetTo("Output Channels: ");
+	str<<fPlugin->Channels(VST_OUTPUT_CHANNELS);
+	label = fAboutGroup->MakeNullParameter(P_ABOUT + 5,
+						B_MEDIA_NO_TYPE, str.String(), B_GENERIC);
+		
+	SetParameterWeb(fWeb);
+}
+
+void 
+VSTNode::InitFilter()
+{	
+	fBlockSize = fFormat.u.raw_audio.buffer_size / 
+				(fFormat.u.raw_audio.channel_count * sizeof(float));
+
+	fPlugin->SetBlockSize(fBlockSize);
+	fPlugin->SetSampleRate(fFormat.u.raw_audio.frame_rate);
+}
+
+bigtime_t 
+VSTNode::GetFilterLatency()
+{
+	if(fOutputMedia.destination == media_destination::null) {
+		return 0LL;
+	}
+
+	BBufferGroup *temp_group = new BBufferGroup(fOutputMedia.format.u.raw_audio.buffer_size, 1);
+
+	BBuffer *buffer = temp_group->RequestBuffer(fOutputMedia.format.u.raw_audio.buffer_size);
+	buffer->Header()->type = B_MEDIA_RAW_AUDIO;
+	buffer->Header()->size_used = fOutputMedia.format.u.raw_audio.buffer_size;
+
+	bigtime_t begin = system_time();
+	FilterBuffer(buffer);
+	bigtime_t latency = system_time()-begin;
+
+	InitFilter();
+
+	buffer->Recycle();
+	delete temp_group;
+	
+	return latency;
+}
+
+void 
+VSTNode::FilterBuffer(BBuffer* buffer)
+{
+	uint32 m_frameSize = (fFormat.u.raw_audio.format & 0x0f)*
+				 fFormat.u.raw_audio.channel_count;
+	uint32 samples = buffer->Header()->size_used / m_frameSize;		
+	uint32 channels = fFormat.u.raw_audio.channel_count;
+	
+	if(fMute != 0) {		
+		memset(buffer->Data(), 0, buffer->Header()->size_used);
+	} else {
+		if(fByPass == 0) {
+			fPlugin->Process((float*)buffer->Data(), samples, channels);
+		}
+	}
+}

src/add-ons/media/media-add-ons/vst_host/VSTNode.h

@@ -0,0 +1,149 @@
+/*
+ * Copyright 2012, Gerasim Troeglazov (3dEyes**), 3dEyes@gmail.com. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */
+
+#ifndef __VST_NODE_H__
+#define __VST_NODE_H__
+
+#include <Controllable.h>
+#include <BufferProducer.h>
+#include <BufferConsumer.h>
+#include <MediaEventLooper.h>
+
+#include "VSTHost.h"
+
+class BMediaAddOn;
+class BBufferGroup;
+
+#define BUFF_SIZE 0x2000
+
+#define ID_AUDIO_INPUT	1
+#define	ID_AUDIO_OUTPUT 2
+
+//parameter IDs
+enum param_id_t {
+	P_MUTE		= 50,
+	P_BYPASS,
+	
+	P_PARAM		= 5000,
+	P_ABOUT		= 6000,
+	P_LABEL		= 7000,
+	P_LABEL2	= 8000,		
+	P_LABEL3	= 9000,
+};
+
+
+class VSTNode : public	BBufferConsumer,
+				public	BBufferProducer,
+				public	BControllable,
+				public	BMediaEventLooper {	
+public:
+	virtual 				~VSTNode();
+							VSTNode(BMediaAddOn *addon, const char *name, const char* path);
+	//BMediaNode
+public:
+	virtual		BMediaAddOn *AddOn(int32 *id) const;
+	virtual		status_t 	HandleMessage(int32 code, const void *data,	size_t size);
+protected:
+	virtual 	void 		NodeRegistered();
+	//BControllable
+public:	
+	virtual 	status_t 	GetParameterValue(int32 id,	bigtime_t *lastChangeTime,
+									void *value, size_t *size);
+	virtual 	void 		SetParameterValue(int32 id,	bigtime_t changeTime,
+									const void *value, size_t size);
+	//BBufferConsumer
+public:
+	virtual 	void 		BufferReceived(BBuffer *buffer);									
+	virtual 	status_t 	AcceptFormat(const media_destination &dst,
+							media_format *format);
+	virtual 	status_t 	GetNextInput(int32 *cookie,	media_input *input);
+	virtual 	void 		DisposeInputCookie(int32 cookie);
+	virtual 	status_t 	FormatChanged(const media_source &src,
+									const media_destination &dst,
+							int32 change_tag, const media_format &format);
+	virtual 	void 		ProducerDataStatus(const media_destination &dst,
+									int32 status,
+									bigtime_t when);	
+	virtual 	status_t 	GetLatencyFor(const media_destination &dst,
+							bigtime_t *latency,
+							media_node_id *time_src);		
+	virtual 	status_t 	Connected(const media_source &src, 
+									const media_destination &dst,
+									const media_format &format,
+									media_input *input);
+	virtual 	void 		Disconnected(const media_source &src,
+									const media_destination &dst);
+	//BBufferProducer
+public:
+	virtual 	status_t 	FormatSuggestionRequested(media_type type,
+									int32 quality, media_format *format);
+	virtual 	status_t 	FormatProposal(const media_source &src,
+									media_format *format);
+	virtual 	status_t 	FormatChangeRequested(const media_source &src,
+									const media_destination &dst,
+									media_format *format,
+									int32* _deprecated_);
+	virtual 	void 		LateNoticeReceived(const media_source &src,
+									bigtime_t late,	bigtime_t when);
+	virtual 	status_t	GetNextOutput(int32 *cookie, media_output *output);
+	virtual 	status_t 	DisposeOutputCookie(int32 cookie);
+	virtual 	status_t	SetBufferGroup(const media_source &src,
+									BBufferGroup *group);
+	virtual 	status_t 	PrepareToConnect(const media_source &src,
+									const media_destination &dst,
+									media_format *format, media_source *out_source,
+									char *name);
+	virtual 	void 		Connect(status_t status,
+									const media_source &src,
+									const media_destination &dst,
+									const media_format &format,
+									char* name);
+	virtual		void 		Disconnect(const media_source &src,
+									const media_destination &dst);		
+	virtual 	void 		EnableOutput(const media_source &src,
+									bool enabled, int32* _deprecated_);
+	virtual 	status_t 	GetLatency(bigtime_t *outLatency);
+	virtual 	void 		LatencyChanged(	const media_source &src,
+									const media_destination &dst,
+									bigtime_t latency, uint32 flags);
+	//BMediaEventLooper
+protected:									
+	virtual 	bigtime_t 	OfflineTime();
+	//VSTNode
+protected:
+	virtual 	void 		HandleEvent(const media_timed_event *event,
+									bigtime_t late,
+									bool realTimeEvent=false);
+				void 		ParameterEventProcessing(const media_timed_event *event);		
+				status_t 	ValidateFormat(const media_format& preferredFormat,
+									media_format &proposedFormat);
+				void 		SetOutputFormat(media_format& ioFormat);
+	virtual 	void 		InitParameterValues();
+	virtual 	void 		InitParameterWeb();
+	virtual 	void 		InitFilter();
+	virtual 	bigtime_t 	GetFilterLatency();
+	virtual 	void 		FilterBuffer(BBuffer* pBuffer);
+
+private:
+	BMediaAddOn				*fAddOn;
+	VSTPlugin				*fPlugin;
+	BParameterWeb			*fWeb;
+
+	media_format			fPreferredFormat;
+	media_format			fFormat;
+	media_input				fInputMedia;
+	media_output			fOutputMedia;
+	bool					fOutputMediaEnabled;
+	bigtime_t				fDownstreamLatency;
+	bigtime_t				fProcessLatency;
+	
+	int32					fBlockSize;	
+	int32					fMute;
+	int32					fByPass;
+	bigtime_t				fMuteLastChanged;
+	bigtime_t				fByPassLastChanged;
+};
+
+#endif //__VST_NODE_H__