More tweaks for wasm, engine verified to work, still with hacks

Signed-off-by: falkTX <falktx@falktx.com>

source/Makefile.deps.mk

@@ -85,13 +85,23 @@ endif
 # ---------------------------------------------------------------------------------------------------------------------
 # Set PKG_CONFIG (can be overridden by environment variable)
 
-ifeq ($(WINDOWS),true)
+ifeq ($(WASM),true)
+# Skip on wasm by default
+PKG_CONFIG ?= false
+else ifeq ($(WINDOWS),true)
 # Build statically on Windows by default
 PKG_CONFIG ?= pkg-config --static
 else
 PKG_CONFIG ?= pkg-config
 endif
 
+# ---------------------------------------------------------------------------------------------------------------------
+# Set cross compiling flag
+
+ifeq ($(WASM),true)
+CROSS_COMPILING = true
+endif
+
 # ---------------------------------------------------------------------------------------------------------------------
 # Set LINUX_OR_MACOS
 

source/backend/engine/CarlaEngineNative.cpp

@@ -21,6 +21,10 @@
 # error This file should not be compiled if building alternative-arch bridges
 #endif
 
+#ifdef CARLA_OS_WASM
+# define CARLA_ENGINE_WITHOUT_UI
+#endif
+
 #include "CarlaEngineInit.hpp"
 #include "CarlaEngineInternal.hpp"
 #include "CarlaPlugin.hpp"
@@ -61,6 +65,7 @@ static const uint16_t kUiHeight = 712;
 
 // -----------------------------------------------------------------------
 
+#ifndef CARLA_ENGINE_WITHOUT_UI
 class CarlaEngineNative;
 
 class CarlaEngineNativeUI : public CarlaExternalUI
@@ -89,6 +94,7 @@ private:
 
     CARLA_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(CarlaEngineNativeUI)
 };
+#endif
 
 // -----------------------------------------------------------------------
 
@@ -112,8 +118,10 @@ public:
           fIsActive(false),
           fIsRunning(false),
           fUsesEmbed(false),
+#ifndef CARLA_ENGINE_WITHOUT_UI
           fUiServer(this),
           fLastScaleFactor(1.0f),
+#endif
           fLastProjectFolder(),
           fPluginDeleterMutex(),
           fOptionsForced(false)
@@ -280,8 +288,10 @@ public:
     {
         CarlaEngine::callback(sendHost, sendOsc, action, pluginId, value1, value2, value3, valuef, valueStr);
 
+#ifndef CARLA_ENGINE_WITHOUT_UI
         if (sendHost)
             uiServerCallback(action, pluginId, value1, value2, value3, valuef, valueStr);
+#endif
 
         switch (action)
         {
@@ -298,11 +308,13 @@ public:
                 {
                     fParameters[rindex] = valuef;
 
+#ifndef CARLA_ENGINE_WITHOUT_UI
                     if (fUsesEmbed || fUiServer.isPipeRunning())
                     {
                         pHost->ui_parameter_changed(pHost->handle, rindex, valuef);
                     }
                     else
+#endif
                     {
                         static uint last_pluginId = pluginId;
                         static int last_value1 = value1;
@@ -390,6 +402,7 @@ protected:
         if (pData->bufferSize == newBufferSize)
             return;
 
+#ifndef CARLA_ENGINE_WITHOUT_UI
         {
             const CarlaMutexLocker cml(fUiServer.getPipeLock());
 
@@ -404,6 +417,7 @@ protected:
                     fUiServer.flushMessages();
             }
         }
+#endif
 
         pData->bufferSize = newBufferSize;
         CarlaEngine::bufferSizeChanged(newBufferSize);
@@ -414,6 +428,7 @@ protected:
         if (carla_isEqual(pData->sampleRate, newSampleRate))
             return;
 
+#ifndef CARLA_ENGINE_WITHOUT_UI
         {
             const CarlaMutexLocker cml(fUiServer.getPipeLock());
 
@@ -431,11 +446,13 @@ protected:
                     fUiServer.flushMessages();
             }
         }
+#endif
 
         pData->sampleRate = newSampleRate;
         CarlaEngine::sampleRateChanged(newSampleRate);
     }
 
+#ifndef CARLA_ENGINE_WITHOUT_UI
     // -------------------------------------------------------------------
 
     void uiServerSendPluginInfo(const CarlaPluginPtr& plugin)
@@ -911,6 +928,7 @@ protected:
         CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
         fUiServer.flushMessages();
     }
+#endif
 
     // -------------------------------------------------------------------
     // Plugin parameter calls
@@ -1217,6 +1235,7 @@ protected:
     // -------------------------------------------------------------------
     // Plugin UI calls
 
+#ifndef CARLA_ENGINE_WITHOUT_UI
     void uiShow(const bool show)
     {
         if (show)
@@ -1468,6 +1487,7 @@ protected:
             }
         }
     }
+#endif
 
     // -------------------------------------------------------------------
     // Plugin state calls
@@ -1591,6 +1611,7 @@ public:
         handlePtr->setParameterValue(index, value);
     }
 
+#ifndef CARLA_ENGINE_WITHOUT_UI
     static void _ui_show(NativePluginHandle handle, bool show)
     {
         handlePtr->uiShow(show);
@@ -1605,6 +1626,7 @@ public:
     {
         handlePtr->uiSetParameterValue(index, value);
     }
+#endif
 
     static void _activate(NativePluginHandle handle)
     {
@@ -1717,10 +1739,12 @@ private:
     const bool kIsPatchbay; // rack if false
     const bool kHasMidiOut;
     bool fIsActive, fIsRunning, fUsesEmbed;
+#ifndef CARLA_ENGINE_WITHOUT_UI
     CarlaEngineNativeUI fUiServer;
+    float fLastScaleFactor;
+#endif
 
     float fParameters[kNumInParams+kNumOutParams];
-    float fLastScaleFactor;
     CarlaString fLastProjectFolder;
     CarlaMutex fPluginDeleterMutex;
 
@@ -1779,6 +1803,7 @@ private:
 
 // -----------------------------------------------------------------------
 
+#ifndef CARLA_ENGINE_WITHOUT_UI
 bool CarlaEngineNativeUI::msgReceived(const char* const msg) noexcept
 {
     if (CarlaExternalUI::msgReceived(msg))
@@ -2359,6 +2384,7 @@ void CarlaEngineNativeUI::_updateParamValues(const CarlaPluginPtr& plugin,
         }
     }
 }
+#endif
 
 // -----------------------------------------------------------------------
 
@@ -2391,9 +2417,13 @@ static const NativePluginDescriptor carlaRackDesc = {
     CarlaEngineNative::_set_parameter_value,
     /* _set_midi_program       */ nullptr,
     /* _set_custom_data        */ nullptr,
+#ifndef CARLA_ENGINE_WITHOUT_UI
     CarlaEngineNative::_ui_show,
     CarlaEngineNative::_ui_idle,
     CarlaEngineNative::_ui_set_parameter_value,
+#else
+    nullptr, nullptr, nullptr,
+#endif
     /* _ui_set_midi_program    */ nullptr,
     /* _ui_set_custom_data     */ nullptr,
     CarlaEngineNative::_activate,
@@ -2440,9 +2470,13 @@ static const NativePluginDescriptor carlaRackNoMidiOutDesc = {
     CarlaEngineNative::_set_parameter_value,
     /* _set_midi_program       */ nullptr,
     /* _set_custom_data        */ nullptr,
+#ifndef CARLA_ENGINE_WITHOUT_UI
     CarlaEngineNative::_ui_show,
     CarlaEngineNative::_ui_idle,
     CarlaEngineNative::_ui_set_parameter_value,
+#else
+    nullptr, nullptr, nullptr,
+#endif
     /* _ui_set_midi_program    */ nullptr,
     /* _ui_set_custom_data     */ nullptr,
     CarlaEngineNative::_activate,
@@ -2489,9 +2523,13 @@ static const NativePluginDescriptor carlaPatchbayDesc = {
     CarlaEngineNative::_set_parameter_value,
     /* _set_midi_program       */ nullptr,
     /* _set_custom_data        */ nullptr,
+#ifndef CARLA_ENGINE_WITHOUT_UI
     CarlaEngineNative::_ui_show,
     CarlaEngineNative::_ui_idle,
     CarlaEngineNative::_ui_set_parameter_value,
+#else
+    nullptr, nullptr, nullptr,
+#endif
     /* _ui_set_midi_program    */ nullptr,
     /* _ui_set_custom_data     */ nullptr,
     CarlaEngineNative::_activate,
@@ -2538,9 +2576,13 @@ static const NativePluginDescriptor carlaPatchbay3sDesc = {
     CarlaEngineNative::_set_parameter_value,
     /* _set_midi_program       */ nullptr,
     /* _set_custom_data        */ nullptr,
+#ifndef CARLA_ENGINE_WITHOUT_UI
     CarlaEngineNative::_ui_show,
     CarlaEngineNative::_ui_idle,
     CarlaEngineNative::_ui_set_parameter_value,
+#else
+    nullptr, nullptr, nullptr,
+#endif
     /* _ui_set_midi_program    */ nullptr,
     /* _ui_set_custom_data     */ nullptr,
     CarlaEngineNative::_activate,
@@ -2587,9 +2629,13 @@ static const NativePluginDescriptor carlaPatchbay16Desc = {
     CarlaEngineNative::_set_parameter_value,
     /* _set_midi_program       */ nullptr,
     /* _set_custom_data        */ nullptr,
+#ifndef CARLA_ENGINE_WITHOUT_UI
     CarlaEngineNative::_ui_show,
     CarlaEngineNative::_ui_idle,
     CarlaEngineNative::_ui_set_parameter_value,
+#else
+    nullptr, nullptr, nullptr,
+#endif
     /* _ui_set_midi_program    */ nullptr,
     /* _ui_set_custom_data     */ nullptr,
     CarlaEngineNative::_activate,
@@ -2636,9 +2682,13 @@ static const NativePluginDescriptor carlaPatchbay32Desc = {
     CarlaEngineNative::_set_parameter_value,
     /* _set_midi_program       */ nullptr,
     /* _set_custom_data        */ nullptr,
+#ifndef CARLA_ENGINE_WITHOUT_UI
     CarlaEngineNative::_ui_show,
     CarlaEngineNative::_ui_idle,
     CarlaEngineNative::_ui_set_parameter_value,
+#else
+    nullptr, nullptr, nullptr,
+#endif
     /* _ui_set_midi_program    */ nullptr,
     /* _ui_set_custom_data     */ nullptr,
     CarlaEngineNative::_activate,
@@ -2685,9 +2735,13 @@ static const NativePluginDescriptor carlaPatchbay64Desc = {
     CarlaEngineNative::_set_parameter_value,
     /* _set_midi_program       */ nullptr,
     /* _set_custom_data        */ nullptr,
+#ifndef CARLA_ENGINE_WITHOUT_UI
     CarlaEngineNative::_ui_show,
     CarlaEngineNative::_ui_idle,
     CarlaEngineNative::_ui_set_parameter_value,
+#else
+    nullptr, nullptr, nullptr,
+#endif
     /* _ui_set_midi_program    */ nullptr,
     /* _ui_set_custom_data     */ nullptr,
     CarlaEngineNative::_activate,
@@ -2735,9 +2789,13 @@ static const NativePluginDescriptor carlaPatchbayCVDesc = {
     CarlaEngineNative::_set_parameter_value,
     /* _set_midi_program       */ nullptr,
     /* _set_custom_data        */ nullptr,
+#ifndef CARLA_ENGINE_WITHOUT_UI
     CarlaEngineNative::_ui_show,
     CarlaEngineNative::_ui_idle,
     CarlaEngineNative::_ui_set_parameter_value,
+#else
+    nullptr, nullptr, nullptr,
+#endif
     /* _ui_set_midi_program    */ nullptr,
     /* _ui_set_custom_data     */ nullptr,
     CarlaEngineNative::_activate,
@@ -2785,9 +2843,13 @@ static const NativePluginDescriptor carlaPatchbayCV8Desc = {
     CarlaEngineNative::_set_parameter_value,
     /* _set_midi_program       */ nullptr,
     /* _set_custom_data        */ nullptr,
+#ifndef CARLA_ENGINE_WITHOUT_UI
     CarlaEngineNative::_ui_show,
     CarlaEngineNative::_ui_idle,
     CarlaEngineNative::_ui_set_parameter_value,
+#else
+    nullptr, nullptr, nullptr,
+#endif
     /* _ui_set_midi_program    */ nullptr,
     /* _ui_set_custom_data     */ nullptr,
     CarlaEngineNative::_activate,
@@ -2835,9 +2897,13 @@ static const NativePluginDescriptor carlaPatchbayCV32Desc = {
     CarlaEngineNative::_set_parameter_value,
     /* _set_midi_program       */ nullptr,
     /* _set_custom_data        */ nullptr,
+#ifndef CARLA_ENGINE_WITHOUT_UI
     CarlaEngineNative::_ui_show,
     CarlaEngineNative::_ui_idle,
     CarlaEngineNative::_ui_set_parameter_value,
+#else
+    nullptr, nullptr, nullptr,
+#endif
     /* _ui_set_midi_program    */ nullptr,
     /* _ui_set_custom_data     */ nullptr,
     CarlaEngineNative::_activate,

source/backend/plugin/CarlaPluginLV2.cpp

@@ -49,6 +49,10 @@ extern "C" {
 # endif
 #endif
 
+#ifdef CARLA_OS_WASM
+# define LV2_UIS_ONLY_INPROCESS
+#endif
+
 #include <string>
 #include <vector>
 
@@ -485,6 +489,7 @@ struct CarlaPluginLV2Options {
     CARLA_DECLARE_NON_COPYABLE(CarlaPluginLV2Options);
 };
 
+#ifndef LV2_UIS_ONLY_INPROCESS
 // -------------------------------------------------------------------------------------------------------------------
 
 class CarlaPluginLV2;
@@ -576,6 +581,7 @@ private:
 };
 
 // -------------------------------------------------------------------------------------------------------------------
+#endif
 
 static void initAtomForge(LV2_Atom_Forge& atomForge) noexcept
 {
@@ -648,7 +654,9 @@ public:
           fEventsIn(),
           fEventsOut(),
           fLv2Options(),
+#ifndef LV2_UIS_ONLY_INPROCESS
           fPipeServer(engine, this),
+#endif
           fCustomURIDs(kUridCount, std::string("urn:null")),
           fFirstActive(true),
           fLastStateChunk(nullptr),
@@ -675,11 +683,13 @@ public:
         {
             showCustomUI(false);
 
+#ifndef LV2_UIS_ONLY_INPROCESS
             if (fUI.type == UI::TYPE_BRIDGE)
             {
                 fPipeServer.stopPipeServer(pData->engine->getOptions().uiBridgesTimeout);
             }
             else
+#endif
             {
                 if (fFeatures[kFeatureIdUiDataAccess] != nullptr && fFeatures[kFeatureIdUiDataAccess]->data != nullptr)
                     delete (LV2_Extension_Data_Feature*)fFeatures[kFeatureIdUiDataAccess]->data;
@@ -1466,8 +1476,10 @@ public:
         if (fFeatures[kFeatureIdExternalUi] != nullptr && fFeatures[kFeatureIdExternalUi]->data != nullptr)
             ((LV2_External_UI_Host*)fFeatures[kFeatureIdExternalUi]->data)->plugin_human_id = fLv2Options.windowTitle;
 
+#ifndef LV2_UIS_ONLY_INPROCESS
         if (fPipeServer.isPipeRunning())
             fPipeServer.writeUiTitleMessage(fLv2Options.windowTitle);
+#endif
 
 #ifndef LV2_UIS_ONLY_BRIDGES
         if (fUI.window != nullptr)
@@ -1786,6 +1798,7 @@ public:
             pData->transientTryCounter = 0;
 #endif
 
+#ifndef LV2_UIS_ONLY_INPROCESS
         if (fUI.type == UI::TYPE_BRIDGE)
         {
             if (yesNo)
@@ -1916,6 +1929,7 @@ public:
             }
             return;
         }
+#endif
 
         // take some precautions
         CARLA_SAFE_ASSERT_RETURN(fUI.descriptor != nullptr,);
@@ -2188,12 +2202,14 @@ public:
 
             for (; tmpRingBuffer.get(atom, portIndex);)
             {
+#ifndef LV2_UIS_ONLY_INPROCESS
                 if (fUI.type == UI::TYPE_BRIDGE)
                 {
                     if (fPipeServer.isPipeRunning())
                         fPipeServer.writeLv2AtomMessage(portIndex, atom);
                 }
                 else
+#endif
                 {
                     if (hasPortEvent && ! fNeedsUiClose)
                         fUI.descriptor->port_event(fUI.handle, portIndex, lv2_atom_total_size(atom), kUridAtomTransferEvent, atom);
@@ -2203,6 +2219,7 @@ public:
             }
         }
 
+#ifndef LV2_UIS_ONLY_INPROCESS
         if (fPipeServer.isPipeRunning())
         {
             fPipeServer.idlePipe();
@@ -2231,6 +2248,7 @@ public:
         {
             // TODO - detect if ui-bridge crashed
         }
+#endif
 
         if (fNeedsUiClose)
         {
@@ -4943,12 +4961,14 @@ public:
         CARLA_SAFE_ASSERT_RETURN(index < pData->param.count,);
         CARLA_SAFE_ASSERT_RETURN(pData->param.data[index].rindex >= 0,);
 
+#ifndef LV2_UIS_ONLY_INPROCESS
         if (fUI.type == UI::TYPE_BRIDGE)
         {
             if (! fPipeServer.isPipeRunning())
                 return;
         }
         else
+#endif
         {
             if (fUI.handle == nullptr)
                 return;
@@ -4970,11 +4990,14 @@ public:
 
             const char* const uri = fRdfDescriptor->Parameters[rindex].URI;
 
+#ifndef LV2_UIS_ONLY_INPROCESS
             if (fUI.type == UI::TYPE_BRIDGE)
             {
                 fPipeServer.writeLv2ParameterMessage(uri, value);
             }
-            else if (fEventsIn.ctrl != nullptr)
+            else
+#endif
+            if (fEventsIn.ctrl != nullptr)
             {
                 uint8_t atomBuf[256];
                 LV2_Atom_Forge atomForge;
@@ -5028,11 +5051,13 @@ public:
         }
         else
         {
+#ifndef LV2_UIS_ONLY_INPROCESS
             if (fUI.type == UI::TYPE_BRIDGE)
             {
                 fPipeServer.writeControlMessage(static_cast<uint32_t>(pData->param.data[index].rindex), value);
             }
             else
+#endif
             {
                 fUI.descriptor->port_event(fUI.handle,
                                            static_cast<uint32_t>(pData->param.data[index].rindex),
@@ -5046,12 +5071,14 @@ public:
         CARLA_SAFE_ASSERT_RETURN(fUI.type != UI::TYPE_NULL || fFilePathURI.isNotEmpty(),);
         CARLA_SAFE_ASSERT_RETURN(index < pData->midiprog.count,);
 
+#ifndef LV2_UIS_ONLY_INPROCESS
         if (fUI.type == UI::TYPE_BRIDGE)
         {
             if (fPipeServer.isPipeRunning())
                 fPipeServer.writeMidiProgramMessage(pData->midiprog.data[index].bank, pData->midiprog.data[index].program);
         }
         else
+#endif
         {
             if (fExt.uiprograms != nullptr && fExt.uiprograms->select_program != nullptr && ! fNeedsUiClose)
                 fExt.uiprograms->select_program(fUI.handle, pData->midiprog.data[index].bank, pData->midiprog.data[index].program);
@@ -5666,8 +5693,10 @@ public:
 
         fCustomURIDs.push_back(uri);
 
+#ifndef LV2_UIS_ONLY_INPROCESS
         if (fUI.type == UI::TYPE_BRIDGE && fPipeServer.isPipeRunning())
             fPipeServer.writeLv2UridMessage(urid, uri);
+#endif
 
         return urid;
     }
@@ -6353,10 +6382,12 @@ public:
         return fDescriptor;
     }
 
+#ifndef LV2_UIS_ONLY_INPROCESS
     uintptr_t getUiBridgeProcessId() const noexcept override
     {
         return fPipeServer.isPipeRunning() ? fPipeServer.getPID() : 0;
     }
+#endif
 
     // -------------------------------------------------------------------
 
@@ -7044,8 +7075,9 @@ public:
         // ---------------------------------------------------------------
         // initialize ui according to type
 
-        const LV2_Property uiType(fUI.rdfDescriptor->Type);
+        const LV2_Property uiType = fUI.rdfDescriptor->Type;
 
+#ifndef LV2_UIS_ONLY_INPROCESS
         if (
             (iFinal == eQt4     ||
              iFinal == eQt5     ||
@@ -7095,6 +7127,7 @@ public:
                 return;
             }
         }
+#endif
 
 #ifdef LV2_UIS_ONLY_BRIDGES
         carla_stderr2("Failed to get an UI working, canBridge:%s", bool2str(isUiBridgeable(static_cast<uint32_t>(iFinal))));
@@ -7435,7 +7468,9 @@ private:
     CarlaPluginLV2EventData fEventsIn;
     CarlaPluginLV2EventData fEventsOut;
     CarlaPluginLV2Options   fLv2Options;
+#ifndef LV2_UIS_ONLY_INPROCESS
     CarlaPipeServerLV2      fPipeServer;
+#endif
 
     std::vector<std::string> fCustomURIDs;
 
@@ -7476,7 +7511,9 @@ private:
     struct UI {
         enum Type {
             TYPE_NULL = 0,
+#ifndef LV2_UIS_ONLY_INPROCESS
             TYPE_BRIDGE,
+#endif
             TYPE_EMBED,
             TYPE_EXTERNAL
         };
@@ -8124,6 +8161,7 @@ private:
 
 // -------------------------------------------------------------------------------------------------------------------
 
+#ifndef LV2_UIS_ONLY_INPROCESS
 bool CarlaPipeServerLV2::msgReceived(const char* const msg) noexcept
 {
     if (std::strcmp(msg, "exiting") == 0)
@@ -8254,6 +8292,7 @@ bool CarlaPipeServerLV2::msgReceived(const char* const msg) noexcept
 
     return false;
 }
+#endif
 
 // -------------------------------------------------------------------------------------------------------------------
 

source/backend/plugin/CarlaPluginVST2.cpp

@@ -2565,6 +2565,7 @@ public:
         sCurrentUniqueId     = static_cast<intptr_t>(uniqueId);
         sLastCarlaPluginVST2 = this;
 
+#if !(defined(CARLA_OS_WASM) || defined(CARLA_OS_WIN))
         bool wasTriggered, wasThrown = false;
         {
             const ScopedAbortCatcher sac;
@@ -2587,6 +2588,7 @@ public:
                 fEffect = vstFn(carla_vst_audioMasterCallback);
             } CARLA_SAFE_EXCEPTION_RETURN("VST init 2nd attempt", false);
         }
+#endif
 
         sLastCarlaPluginVST2 = nullptr;
         sCurrentUniqueId     = 0;

source/includes/CarlaNativeExtUI.hpp

@@ -1,6 +1,6 @@
 /*
  * Carla Native Plugin API (C++)
- * Copyright (C) 2012-2020 Filipe Coelho <falktx@falktx.com>
+ * Copyright (C) 2012-2022 Filipe Coelho <falktx@falktx.com>
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
@@ -30,13 +30,17 @@
 // -----------------------------------------------------------------------
 // Native Plugin and External UI class
 
-class NativePluginAndUiClass : public NativePluginClass,
-                               public CarlaExternalUI
+class NativePluginAndUiClass : public NativePluginClass
+#ifndef CARLA_OS_WASM
+                             , public CarlaExternalUI
+#endif
 {
 public:
     NativePluginAndUiClass(const NativeHostDescriptor* const host, const char* const pathToExternalUI)
         : NativePluginClass(host),
+#ifndef CARLA_OS_WASM
           CarlaExternalUI(),
+#endif
           fExtUiPath(getResourceDir())
     {
         fExtUiPath += CARLA_OS_SEP_STR;
@@ -51,6 +55,7 @@ public:
         return fExtUiPath;
     }
 
+#ifndef CARLA_OS_WASM
 protected:
     // -------------------------------------------------------------------
     // Plugin UI calls
@@ -212,6 +217,7 @@ protected:
 
         return false;
     }
+#endif
 
 private:
     CarlaString fExtUiPath;

source/native-plugins/midi-pattern.cpp

@@ -306,6 +306,7 @@ protected:
         fLastFrame = fTimeInfo.frame;
     }
 
+#ifndef CARLA_OS_WASM
     // -------------------------------------------------------------------
     // Plugin UI calls
 
@@ -355,6 +356,7 @@ protected:
             flushMessages();
         }
     }
+#endif
 
     // -------------------------------------------------------------------
     // Plugin state calls
@@ -368,8 +370,10 @@ protected:
     {
         fMidiOut.setState(data);
 
+#ifndef CARLA_OS_WASM
         if (isPipeRunning())
             _sendEventsToUI();
+#endif
     }
 
     // -------------------------------------------------------------------
@@ -397,6 +401,7 @@ protected:
         NativePluginAndUiClass::writeMidiEvent(&midiEvent);
     }
 
+#ifndef CARLA_OS_WASM
     // -------------------------------------------------------------------
     // Pipe Server calls
 
@@ -481,6 +486,7 @@ protected:
 
         return false;
     }
+#endif
 
     // -------------------------------------------------------------------
 
@@ -502,6 +508,7 @@ private:
 
     float fParameters[kParameterCount];
 
+#ifndef CARLA_OS_WASM
     void _sendEventsToUI() const noexcept
     {
         char strBuf[0xff+1];
@@ -540,6 +547,7 @@ private:
             }
         }
     }
+#endif
 
     PluginClassEND(MidiPatternPlugin)
     CARLA_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(MidiPatternPlugin)

source/native-plugins/xycontroller.cpp

@@ -168,6 +168,7 @@ protected:
             writeMidiEvent(&midiEvents[i]);
     }
 
+#ifndef CARLA_OS_WASM
     // -------------------------------------------------------------------
     // Pipe Server calls
 
@@ -242,6 +243,7 @@ protected:
 
         return false;
     }
+#endif
 
 private:
     float params[kParamCount];

source/plugin/Makefile

@@ -143,6 +143,25 @@ SYMBOLS_LV2    += -Wl,-exported_symbol,_lv2ui_descriptor
 SYMBOLS_LV2_UI  = -Wl,-exported_symbol,_lv2ui_descriptor
 endif
 SYMBOLS_VST     = -Wl,-exported_symbol,_VSTPluginMain
+else ifeq ($(WASM),true)
+SYMBOLS_NATIVE  = -sSIDE_MODULE=2 -sEXPORTED_FUNCTIONS="[
+SYMBOLS_NATIVE += 'carla_get_native_rack_plugin',
+SYMBOLS_NATIVE += 'carla_get_native_patchbay_plugin',
+SYMBOLS_NATIVE += 'carla_get_native_patchbay16_plugin',
+SYMBOLS_NATIVE += 'carla_get_native_patchbay32_plugin',
+SYMBOLS_NATIVE += 'carla_get_native_patchbay64_plugin',
+SYMBOLS_NATIVE += 'carla_get_native_patchbay_cv_plugin',
+SYMBOLS_NATIVE += 'carla_create_native_plugin_host_handle',
+SYMBOLS_NATIVE += 'carla_host_handle_free',
+SYMBOLS_NATIVE += 'carla_get_native_plugin_engine'
+SYMBOLS_NATIVE += ]"
+ifeq ($(HAVE_PYQT),true)
+SYMBOLS_LV2     = -sSIDE_MODULE=2 -sEXPORTED_FUNCTIONS="['lv2_descriptor','lv2ui_descriptor']"
+SYMBOLS_LV2_UI  = -sSIDE_MODULE=2 -sEXPORTED_FUNCTIONS="['lv2ui_descriptor']"
+else
+SYMBOLS_LV2     = -sSIDE_MODULE=2 -sEXPORTED_FUNCTIONS="['lv2_descriptor']"
+endif
+SYMBOLS_VST     = -sSIDE_MODULE=2 -sEXPORTED_FUNCTIONS="['VSTPluginMain']"
 else ifeq ($(WINDOWS),true)
 SYMBOLS_NATIVE  = symbols/carla-native-plugin.def
 SYMBOLS_VST     = symbols/carla-vst.def

source/plugin/carla-vst-export.cpp

@@ -112,7 +112,7 @@ const AEffect* VSTPluginMain(audioMasterCallback audioMaster)
     return VSTPluginMainInit(effect);
 }
 
-#if ! (defined(CARLA_OS_MAC) || defined(CARLA_OS_WIN))
+#if ! (defined(CARLA_OS_MAC) || defined(CARLA_OS_WASM) || defined(CARLA_OS_WIN))
 CARLA_PLUGIN_EXPORT __cdecl
 const AEffect* VSTPluginMain_asm(audioMasterCallback audioMaster) asm ("main");
 

source/tests/Makefile

@@ -130,12 +130,10 @@ $(BINDIR)/carla-host-plugin: carla-host-plugin.c
 
 # ---------------------------------------------------------------------------------------------------------------------
 
-# 		$(CWD)/../build/plugin/Release/carla-host-plugin.cpp.o \
-
 .PHONY: carla-engine-sdl$(APP_EXT)
-carla-engine-sdl$(APP_EXT): $(OBJDIR)/carla-engine-sdl.c.o
-	$(CC) $< \
-		$(CWD)/../build/backend/Release/CarlaStandalone.cpp.o \
+carla-engine-sdl$(APP_EXT): $(OBJDIR)/carla-engine-sdl.c.o $(OBJDIR)/carla-engine-sdl-extra.cpp.o
+	$(CC) $^ \
+		$(CWD)/../build/plugin/Release/carla-host-plugin.cpp.o \
 		$(MODULEDIR)/carla_engine.a \
 		$(MODULEDIR)/carla_plugin.a \
 		$(MODULEDIR)/lilv.a \

source/tests/carla-engine-sdl-extra.cpp

@@ -0,0 +1,25 @@
+/*
+ * Carla Host Plugin SDL test
+ * Copyright (C) 2022 Filipe Coelho <falktx@falktx.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * For a full copy of the GNU General Public License see the doc/GPL.txt file.
+ */
+
+#define CARLA_PLUGIN_UI_CLASS_PREFIX Standalone
+#include "CarlaPluginUI.cpp"
+// #include "CarlaDssiUtils.cpp"
+// #include "CarlaMacUtils.cpp"
+// #include "CarlaPatchbayUtils.cpp"
+// #include "CarlaPipeUtils.cpp"
+#include "CarlaProcessUtils.cpp"
+#include "CarlaStateUtils.cpp"

source/utils/CarlaProcessUtils.cpp

@@ -1,6 +1,6 @@
 /*
  * Carla process utils
- * Copyright (C) 2019-2020 Filipe Coelho <falktx@falktx.com>
+ * Copyright (C) 2019-2022 Filipe Coelho <falktx@falktx.com>
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
@@ -20,27 +20,23 @@
 // --------------------------------------------------------------------------------------------------------------------
 // process utility classes
 
+#if !(defined(CARLA_OS_WASM) || defined(CARLA_OS_WIN))
 ScopedAbortCatcher::ScopedAbortCatcher()
 {
     s_triggered = false;
-#ifndef CARLA_OS_WIN
     s_oldsig = ::setjmp(s_env) == 0
              ? std::signal(SIGABRT, sig_handler)
              : nullptr;
-#endif
 }
 
 ScopedAbortCatcher::~ScopedAbortCatcher()
 {
-#ifndef CARLA_OS_WIN
     if (s_oldsig != nullptr && ! s_triggered)
         std::signal(SIGABRT, s_oldsig);
-#endif
 }
 
 bool ScopedAbortCatcher::s_triggered = false;
 
-#ifndef CARLA_OS_WIN
 jmp_buf ScopedAbortCatcher::s_env;
 sig_t ScopedAbortCatcher::s_oldsig;
 
@@ -58,7 +54,7 @@ void ScopedAbortCatcher::sig_handler(const int signum)
 
 CarlaSignalRestorer::CarlaSignalRestorer()
 {
-#ifndef CARLA_OS_WIN
+#if !(defined(CARLA_OS_WASM) || defined(CARLA_OS_WIN))
     carla_zeroStructs(sigs, 16);
 
     for (int i=0; i < 16; ++i)
@@ -68,7 +64,7 @@ CarlaSignalRestorer::CarlaSignalRestorer()
 
 CarlaSignalRestorer::~CarlaSignalRestorer()
 {
-#ifndef CARLA_OS_WIN
+#if !(defined(CARLA_OS_WASM) || defined(CARLA_OS_WIN))
     for (int i=0; i < 16; ++i)
         ::sigaction(i+1, &sigs[i], nullptr);
 #endif

source/utils/CarlaProcessUtils.hpp

@@ -95,6 +95,7 @@ void carla_terminateProcessOnParentExit(const bool kill) noexcept
 // --------------------------------------------------------------------------------------------------------------------
 // process utility classes
 
+#if !(defined(CARLA_OS_WASM) || defined(CARLA_OS_WIN))
 /*
  * Catches SIGABRT for a function scope.
  */
@@ -110,15 +111,14 @@ public:
 
 private:
     static bool s_triggered;
-#ifndef CARLA_OS_WIN
     static jmp_buf s_env;
     static sig_t s_oldsig;
     static void sig_handler(const int signum);
-#endif
 
     CARLA_DECLARE_NON_COPYABLE(ScopedAbortCatcher)
     CARLA_PREVENT_HEAP_ALLOCATION
 };
+#endif
 
 /*
  * Store and restore all signal handlers for a function scope.
@@ -129,7 +129,7 @@ public:
   ~CarlaSignalRestorer();
 
 private:
-#ifndef CARLA_OS_WIN
+#if !(defined(CARLA_OS_WASM) || defined(CARLA_OS_WIN))
     struct ::sigaction sigs[16];
 #endif