AU: always allow to set input element rate, fix build

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

Makefile.plugins.mk

@@ -693,9 +693,7 @@ $(au): $(OBJS_DSP) $(BUILD_DIR)/DistrhoPluginMain_AU.cpp.o
 endif
 	-@mkdir -p $(shell dirname $@)
 	@echo "Creating AU component for $(NAME)"
-	$(SILENT)$(CXX) $^ $(BUILD_CXX_FLAGS) $(LINK_FLAGS) $(EXTRA_LIBS) $(EXTRA_DSP_LIBS) $(EXTRA_UI_LIBS) $(DGL_LIBS) -framework AudioToolbox -framework CoreFoundation $(SHARED) $(SYMBOLS_AU) -o $@
-
-# -framework AudioUnit
+	$(SILENT)$(CXX) $^ $(BUILD_CXX_FLAGS) $(LINK_FLAGS) $(EXTRA_LIBS) $(EXTRA_DSP_LIBS) $(EXTRA_UI_LIBS) $(DGL_LIBS) -framework AudioToolbox -framework AudioUnit -framework CoreFoundation $(SHARED) $(SYMBOLS_AU) -o $@
 
 # ---------------------------------------------------------------------------------------------------------------------
 # Export

cmake/DPF-plugin.cmake

@@ -561,12 +561,14 @@ function(dpf__build_au NAME HAS_UI)
   dpf__add_ui_main("${NAME}-au" "au" "${HAS_UI}")
   dpf__set_module_export_list("${NAME}-au" "au")
   find_library(APPLE_AUDIOTOOLBOX_FRAMEWORK "AudioToolbox")
+  find_library(APPLE_AUDIOUNIT_FRAMEWORK "AudioUnit")
   find_library(APPLE_COREFOUNDATION_FRAMEWORK "CoreFoundation")
   target_compile_options("${NAME}-au" PRIVATE "-ObjC++")
   target_link_libraries("${NAME}-au" PRIVATE
     "${NAME}-dsp"
     "${NAME}-ui"
     "${APPLE_AUDIOTOOLBOX_FRAMEWORK}"
+    "${APPLE_AUDIOUNIT_FRAMEWORK}"
     "${APPLE_COREFOUNDATION_FRAMEWORK}")
   set_target_properties("${NAME}-au" PROPERTIES
     LIBRARY_OUTPUT_DIRECTORY "${PROJECT_BINARY_DIR}/bin/${NAME}.component/Contents/MacOS/$<0:>"

distrho/src/DistrhoPluginAU.cpp

@@ -431,15 +431,22 @@ public:
             return noErr;
 
         case kAudioUnitProperty_SampleRate:
-           #if DISTRHO_PLUGIN_NUM_INPUTS == 0 && DISTRHO_PLUGIN_NUM_OUTPUTS != 0
-            DISTRHO_SAFE_ASSERT_UINT_RETURN(inScope == kAudioUnitScope_Output, inScope, kAudioUnitErr_InvalidScope);
-           #else
-            DISTRHO_SAFE_ASSERT_UINT_RETURN(inScope == kAudioUnitScope_Input || inScope == kAudioUnitScope_Output, inScope, kAudioUnitErr_InvalidScope);
-           #endif
             DISTRHO_SAFE_ASSERT_UINT_RETURN(inElement == 0, inElement, kAudioUnitErr_InvalidElement);
-            outDataSize = sizeof(Float64);
-            outWritable = true;
-            return noErr;
+            if (inScope == kAudioUnitScope_Input)
+            {
+                outDataSize = sizeof(Float64);
+                outWritable = true;
+                return noErr;
+            }
+           #if DISTRHO_PLUGIN_NUM_OUTPUTS != 0
+            if (inScope == kAudioUnitScope_Output)
+            {
+                outDataSize = sizeof(Float64);
+                outWritable = true;
+                return noErr;
+            }
+           #endif
+            return kAudioUnitErr_InvalidScope;
 
         case kAudioUnitProperty_ParameterList:
             DISTRHO_SAFE_ASSERT_UINT_RETURN(inElement == 0, inElement, kAudioUnitErr_InvalidElement);
@@ -1062,10 +1069,10 @@ public:
             return noErr;
 
         case kAudioUnitProperty_SampleRate:
-           #if DISTRHO_PLUGIN_NUM_INPUTS == 0 && DISTRHO_PLUGIN_NUM_OUTPUTS != 0
-            DISTRHO_SAFE_ASSERT_UINT_RETURN(inScope == kAudioUnitScope_Output, inScope, kAudioUnitErr_InvalidScope);
-           #else
+           #if DISTRHO_PLUGIN_NUM_OUTPUTS != 0
             DISTRHO_SAFE_ASSERT_UINT_RETURN(inScope == kAudioUnitScope_Input || inScope == kAudioUnitScope_Output, inScope, kAudioUnitErr_InvalidScope);
+           #else
+            DISTRHO_SAFE_ASSERT_UINT_RETURN(inScope == kAudioUnitScope_Input, inScope, kAudioUnitErr_InvalidScope);
            #endif
             DISTRHO_SAFE_ASSERT_UINT_RETURN(inElement == 0, inElement, kAudioUnitErr_InvalidElement);
             DISTRHO_SAFE_ASSERT_UINT_RETURN(inDataSize == sizeof(Float64), inDataSize, kAudioUnitErr_InvalidPropertyValue);
@@ -1113,10 +1120,10 @@ public:
             return kAudioUnitErr_InvalidScope;
 
         case kAudioUnitProperty_StreamFormat:
-           #if DISTRHO_PLUGIN_NUM_INPUTS == 0 && DISTRHO_PLUGIN_NUM_OUTPUTS != 0
-            DISTRHO_SAFE_ASSERT_UINT_RETURN(inScope == kAudioUnitScope_Output, inScope, kAudioUnitErr_InvalidScope);
-           #else
+           #if DISTRHO_PLUGIN_NUM_OUTPUTS != 0
             DISTRHO_SAFE_ASSERT_UINT_RETURN(inScope == kAudioUnitScope_Input || inScope == kAudioUnitScope_Output, inScope, kAudioUnitErr_InvalidScope);
+           #else
+            DISTRHO_SAFE_ASSERT_UINT_RETURN(inScope == kAudioUnitScope_Input, inScope, kAudioUnitErr_InvalidScope);
            #endif
             DISTRHO_SAFE_ASSERT_UINT_RETURN(inElement == 0, inElement, kAudioUnitErr_InvalidElement);
             DISTRHO_SAFE_ASSERT_UINT_RETURN(inDataSize == sizeof(AudioStreamBasicDescription), inDataSize, kAudioUnitErr_InvalidPropertyValue);