add fixDenorm global setting (settings.json + Toolbar)

src/app/Toolbar.cpp

@@ -18,6 +18,8 @@ extern void vst2_idle_detect_mode_get (int *_mode);
 extern void vst2_refresh_rate_set (float _hz);
 extern float vst2_refresh_rate_get (void);
 extern void vst2_window_size_set (int _width, int _height);
+extern int vst2_fix_denorm_get (void);
+extern void vst2_fix_denorm_set (int _bEnable);
 #endif // RACK_HOST
 
 namespace rack {
@@ -385,6 +387,15 @@ struct SettingsVsyncItem : MenuItem {
 	}
 };
 
+struct SettingsFixDenormItem : MenuItem {
+
+	void onAction(EventAction &e) override {
+#ifdef RACK_HOST
+      vst2_fix_denorm_set(!vst2_fix_denorm_get());
+#endif // RACK_HOST
+	}
+};
+
 struct SettingsSaveItem : MenuItem {
 
 	void onAction(EventAction &e) override {
@@ -437,6 +448,11 @@ struct SettingsButton : TooltipIconButton {
       vsyncItem->rightText = CHECKMARK( (0 != lglw_swap_interval_get(global_ui->window.lglw)) );
 		menu->addChild(vsyncItem);
 
+		SettingsFixDenormItem *fixDenormItem = new SettingsFixDenormItem();
+		fixDenormItem->text = "Fix denorm. floats and clip to [-4, 4]";
+      fixDenormItem->rightText = CHECKMARK( (0 != vst2_fix_denorm_get()) );
+		menu->addChild(fixDenormItem);
+
 		SettingsSaveItem *saveItem = new SettingsSaveItem();
 		saveItem->text = "Save Settings (+Favourites)";
 		menu->addChild(saveItem);

src/settings.cpp

@@ -25,6 +25,8 @@ extern void vst2_idle_detect_mode_fx_set (int _mode);
 extern int vst2_idle_detect_mode_fx_get (void);
 extern void vst2_idle_detect_mode_instr_set (int _mode);
 extern int vst2_idle_detect_mode_instr_get (void);
+extern int vst2_fix_denorm_get (void);
+extern void vst2_fix_denorm_set (int _bEnable);
 #endif // RACK_HOST
 
 namespace rack {
@@ -168,6 +170,10 @@ static json_t *settingsToJson() {
 	json_t *sampleRateJ = json_real(engineGetSampleRate());
 	json_object_set_new(rootJ, "sampleRate", sampleRateJ);
 
+	// fixDenorm
+	json_t *fixDenormJ = json_boolean(vst2_fix_denorm_get());
+	json_object_set_new(rootJ, "fixDenorm", fixDenormJ);
+
 	// lastPath
 	json_t *lastPathJ = json_string(global_ui->app.gRackWidget->lastPath.c_str());
 	json_object_set_new(rootJ, "lastPath", lastPathJ);
@@ -414,6 +420,13 @@ static void settingsFromJson(json_t *rootJ, bool bWindowSizeOnly) {
       if (idleJ) {
          vst2_idle_detect_mode_fx_set(int(json_number_value(idleJ)));
       }
+   }
+
+	// fixDenorm
+	json_t *fixDenormJ = json_object_get(rootJ, "fixDenorm");
+	if (fixDenormJ)
+   {
+		vst2_fix_denorm_set(json_is_true(fixDenormJ));
    }
 #endif // RACK_HOST
 

src/vst2_main.cpp

@@ -1,7 +1,7 @@
 #ifdef USE_VST2
 /// vst2_main.cpp
 ///
-/// (c) 2018 bsp. very loosely based on pongasoft's "hello, world" example plugin.
+/// (c) 2018-2019 bsp. very loosely based on pongasoft's "hello, world" example plugin.
 ///
 ///   Licensed under the Apache License, Version 2.0 (the "License");
 ///   you may not use this file except in compliance with the License.
@@ -18,7 +18,7 @@
 /// created: 25Jun2018
 /// changed: 26Jun2018, 27Jun2018, 29Jun2018, 01Jul2018, 02Jul2018, 06Jul2018, 13Jul2018
 ///          26Jul2018, 04Aug2018, 05Aug2018, 06Aug2018, 07Aug2018, 09Aug2018, 11Aug2018
-///          18Aug2018, 19Aug2018, 05Sep2018, 06Sep2018, 10Oct2018, 26Oct2018
+///          18Aug2018, 19Aug2018, 05Sep2018, 06Sep2018, 10Oct2018, 26Oct2018, 10Mar2019
 ///
 ///
 
@@ -497,6 +497,8 @@ public:
    sUI idle_output_framecount;
    bool b_idle;
 
+   sBool b_fix_denorm;  // true=fix denormalized floats + clip to -4..4. fixes broken audio in FLStudio and Reason.
+
    ERect editor_rect;
    sBool b_editor_open;
 
@@ -1034,6 +1036,15 @@ public:
 #endif // VST2_EFFECT
    }
 
+   void setEnableFixDenorm(int32_t _bEnable) {
+      b_fix_denorm = (0 != _bEnable);
+      Dprintf("vst2_main:setEnableFixDenorm(%d)\n", b_fix_denorm);
+   }
+
+   int32_t getEnableFixDenorm(void) {
+      return int32_t(b_fix_denorm);
+   }
+
    sUI getProgramChunk(uint8_t**_addr) {
       setGlobals();
       vst2_set_shared_plugin_tls_globals();
@@ -1503,7 +1514,28 @@ void VSTPluginProcessReplacingFloat32(VSTPlugin *vstPlugin,
             wrapper->idle_output_framecount = 0u;
          }
 
+      } // if idle detect
+
+      // Fix denormalized floats (which can lead to silent audio in FLStudio and Reason)
+      if(wrapper->b_fix_denorm)
+      {
+         for(chIdx = 0u; chIdx < NUM_OUTPUTS; chIdx++)
+         {
+            float *d = _outputs[chIdx];
+            for(int32_t frameIdx = 0; frameIdx < sampleFrames; frameIdx++)
+            {
+               sF32 t = d[frameIdx];
+               t = t + 100.0f;
+               t = t - 100.0f;
+               if(t >= 4.0f)
+                  t = 4.0f;
+               else if(t < -4.0f)
+                  t = -4.0f;
+               d[frameIdx] = t;
+            }
+         }
       }
+
    } // if !wrapper->b_idle
    else
    {
@@ -2147,6 +2179,8 @@ VSTPluginWrapper::VSTPluginWrapper(audioMasterCallback vstHostCallback,
    idle_output_sec_threshold   = 120.0f / 1000.0f;  // idle after 120ms of silence
    idle_output_framecount      = 0u;
 
+   b_fix_denorm = false;
+
    last_program_chunk_str = NULL;
 
    b_open = false;
@@ -2281,6 +2315,14 @@ void vst2_idle_detect_mode_get(int *_mode) {
    *_mode = int(rack::global->vst2.wrapper->idle_detect_mode);
 }
 
+int vst2_fix_denorm_get(void) {
+   return rack::global->vst2.wrapper->getEnableFixDenorm();
+}
+
+void vst2_fix_denorm_set(int _bEnable) {
+   rack::global->vst2.wrapper->setEnableFixDenorm(_bEnable);
+}
+
 
 /**
  * Implementation of the main entry point of the plugin