Update MAPI to add mapi_get_parameter

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

Makefile.plugins.mk

@@ -452,7 +452,7 @@ SYMBOLS_LADSPA = -sEXPORTED_FUNCTIONS="['ladspa_descriptor']"
 SYMBOLS_LV2    = -sEXPORTED_FUNCTIONS="['lv2_descriptor','lv2_generate_ttl','lv2ui_descriptor']"
 SYMBOLS_LV2DSP = -sEXPORTED_FUNCTIONS="['lv2_descriptor','lv2_generate_ttl']"
 SYMBOLS_LV2UI  = -sEXPORTED_FUNCTIONS="['lv2ui_descriptor']"
-SYMBOLS_MAPI   = -sEXPORTED_FUNCTIONS="['_malloc','_free','_mapi_create','_mapi_process','_mapi_set_parameter','_mapi_set_state','_mapi_destroy']"
+SYMBOLS_MAPI   = -sEXPORTED_FUNCTIONS="['_malloc','_free','_mapi_create','_mapi_process','_mapi_get_parameter','_mapi_set_parameter','_mapi_set_state','_mapi_destroy']"
 SYMBOLS_VST2   = -sEXPORTED_FUNCTIONS="['VSTPluginMain']"
 SYMBOLS_VST3   = -sEXPORTED_FUNCTIONS="['GetPluginFactory','ModuleEntry','ModuleExit']"
 else ifeq ($(WINDOWS),true)

distrho/src/DistrhoPluginMAPI.cpp

@@ -64,6 +64,11 @@ public:
         updateParameterOutputsAndTriggers();
     }
 
+    float getParameter(unsigned int index) const
+    {
+        return fPlugin.getParameterValue(index);
+    }
+
     void setParameter(unsigned int index, float value)
     {
         fPlugin.setParameterValue(index, fPlugin.getParameterRanges(index).getFixedValue(value));
@@ -135,6 +140,12 @@ void mapi_process(mapi_handle_t handle,
     static_cast<PluginMAPI*>(handle)->process(ins, outs, frames);
 }
 
+MAPI_EXPORT
+float mapi_get_parameter(mapi_handle_t handle, unsigned int index)
+{
+    return static_cast<PluginMAPI*>(handle)->getParameter(index);
+}
+
 MAPI_EXPORT
 void mapi_set_parameter(mapi_handle_t handle, unsigned int index, float value)
 {

distrho/src/mapi/mapi.h

@@ -43,6 +43,15 @@ void mapi_process(mapi_handle_t handle,
                   float** outs,
                   unsigned int frames);
 
+/**
+   Get an effect parameter.
+   @param handle A previously created effect.
+   @param index A known index for this effect.
+   @return value A full-ranged value.
+*/
+MAPI_EXPORT
+float mapi_get_parameter(mapi_handle_t handle, unsigned int index);
+
 /**
    Set an effect parameter.
    @param handle A previously created effect.