AU Client: Improve AUChannelInfo reporting and add tests

The previous implementation could emit 'wildcard' channel layouts in too
many scenarios.

A wildcard channel count is -1 or -2, and indicates that any number of
channels is supported on the bus.

If the input and output layouts must match, then a layout of [-1, -1]
should be returned.

If any layout is valid in both directions, then a layout of [-1, -2]
should be returned.

In the case where we have a bus A and opposite bus B, we will now only
emit a wildcard count for bus A if every bus standard bus layout up to a
channel count of 16 can be applied successfully without changing the bus
count of B.

examples/DemoRunner/Builds/Android/app/CMakeLists.txt

@@ -34,9 +34,9 @@ include_directories( AFTER
 enable_language(ASM)
 
 if(JUCE_BUILD_CONFIGURATION MATCHES "DEBUG")
-    add_definitions([[-DJUCE_PROJUCER_VERSION=0x80008]] [[-DJUCE_MODULE_AVAILABLE_juce_analytics=1]] [[-DJUCE_MODULE_AVAILABLE_juce_animation=1]] [[-DJUCE_MODULE_AVAILABLE_juce_audio_basics=1]] [[-DJUCE_MODULE_AVAILABLE_juce_audio_devices=1]] [[-DJUCE_MODULE_AVAILABLE_juce_audio_formats=1]] [[-DJUCE_MODULE_AVAILABLE_juce_audio_processors=1]] [[-DJUCE_MODULE_AVAILABLE_juce_audio_utils=1]] [[-DJUCE_MODULE_AVAILABLE_juce_box2d=1]] [[-DJUCE_MODULE_AVAILABLE_juce_core=1]] [[-DJUCE_MODULE_AVAILABLE_juce_cryptography=1]] [[-DJUCE_MODULE_AVAILABLE_juce_data_structures=1]] [[-DJUCE_MODULE_AVAILABLE_juce_dsp=1]] [[-DJUCE_MODULE_AVAILABLE_juce_events=1]] [[-DJUCE_MODULE_AVAILABLE_juce_graphics=1]] [[-DJUCE_MODULE_AVAILABLE_juce_gui_basics=1]] [[-DJUCE_MODULE_AVAILABLE_juce_gui_extra=1]] [[-DJUCE_MODULE_AVAILABLE_juce_javascript=1]] [[-DJUCE_MODULE_AVAILABLE_juce_midi_ci=1]] [[-DJUCE_MODULE_AVAILABLE_juce_opengl=1]] [[-DJUCE_MODULE_AVAILABLE_juce_osc=1]] [[-DJUCE_MODULE_AVAILABLE_juce_product_unlocking=1]] [[-DJUCE_MODULE_AVAILABLE_juce_video=1]] [[-DJUCE_GLOBAL_MODULE_SETTINGS_INCLUDED=1]] [[-DJUCE_USE_MP3AUDIOFORMAT=1]] [[-DJUCE_PLUGINHOST_VST3=1]] [[-DJUCE_PLUGINHOST_LV2=1]] [[-DJUCE_ALLOW_STATIC_NULL_VARIABLES=0]] [[-DJUCE_STRICT_REFCOUNTEDPOINTER=1]] [[-DJUCE_USE_CAMERA=1]] [[-DJUCE_STANDALONE_APPLICATION=1]] [[-DJUCE_DEMO_RUNNER=1]] [[-DJUCE_UNIT_TESTS=1]] [[-DJUCE_PUSH_NOTIFICATIONS=1]] [[-DJUCER_ANDROIDSTUDIO_7F0E4A25=1]] [[-DJUCE_APP_VERSION=8.0.8]] [[-DJUCE_APP_VERSION_HEX=0x80008]] [[-DDEBUG=1]] [[-D_DEBUG=1]])
+    add_definitions([[-DJUCE_PROJUCER_VERSION=0x80008]] [[-DJUCE_MODULE_AVAILABLE_juce_analytics=1]] [[-DJUCE_MODULE_AVAILABLE_juce_animation=1]] [[-DJUCE_MODULE_AVAILABLE_juce_audio_basics=1]] [[-DJUCE_MODULE_AVAILABLE_juce_audio_devices=1]] [[-DJUCE_MODULE_AVAILABLE_juce_audio_formats=1]] [[-DJUCE_MODULE_AVAILABLE_juce_audio_processors=1]] [[-DJUCE_MODULE_AVAILABLE_juce_audio_utils=1]] [[-DJUCE_MODULE_AVAILABLE_juce_box2d=1]] [[-DJUCE_MODULE_AVAILABLE_juce_core=1]] [[-DJUCE_MODULE_AVAILABLE_juce_cryptography=1]] [[-DJUCE_MODULE_AVAILABLE_juce_data_structures=1]] [[-DJUCE_MODULE_AVAILABLE_juce_dsp=1]] [[-DJUCE_MODULE_AVAILABLE_juce_events=1]] [[-DJUCE_MODULE_AVAILABLE_juce_graphics=1]] [[-DJUCE_MODULE_AVAILABLE_juce_gui_basics=1]] [[-DJUCE_MODULE_AVAILABLE_juce_gui_extra=1]] [[-DJUCE_MODULE_AVAILABLE_juce_javascript=1]] [[-DJUCE_MODULE_AVAILABLE_juce_midi_ci=1]] [[-DJUCE_MODULE_AVAILABLE_juce_opengl=1]] [[-DJUCE_MODULE_AVAILABLE_juce_osc=1]] [[-DJUCE_MODULE_AVAILABLE_juce_product_unlocking=1]] [[-DJUCE_MODULE_AVAILABLE_juce_video=1]] [[-DJUCE_GLOBAL_MODULE_SETTINGS_INCLUDED=1]] [[-DJUCE_USE_MP3AUDIOFORMAT=1]] [[-DJUCE_PLUGINHOST_VST3=1]] [[-DJUCE_PLUGINHOST_AU=1]] [[-DJUCE_PLUGINHOST_LV2=1]] [[-DJUCE_ALLOW_STATIC_NULL_VARIABLES=0]] [[-DJUCE_STRICT_REFCOUNTEDPOINTER=1]] [[-DJUCE_USE_CAMERA=1]] [[-DJUCE_STANDALONE_APPLICATION=1]] [[-DJUCE_DEMO_RUNNER=1]] [[-DJUCE_UNIT_TESTS=1]] [[-DJUCE_PUSH_NOTIFICATIONS=1]] [[-DJUCER_ANDROIDSTUDIO_7F0E4A25=1]] [[-DJUCE_APP_VERSION=8.0.8]] [[-DJUCE_APP_VERSION_HEX=0x80008]] [[-DDEBUG=1]] [[-D_DEBUG=1]])
 elseif(JUCE_BUILD_CONFIGURATION MATCHES "RELEASE")
-    add_definitions([[-DJUCE_PROJUCER_VERSION=0x80008]] [[-DJUCE_MODULE_AVAILABLE_juce_analytics=1]] [[-DJUCE_MODULE_AVAILABLE_juce_animation=1]] [[-DJUCE_MODULE_AVAILABLE_juce_audio_basics=1]] [[-DJUCE_MODULE_AVAILABLE_juce_audio_devices=1]] [[-DJUCE_MODULE_AVAILABLE_juce_audio_formats=1]] [[-DJUCE_MODULE_AVAILABLE_juce_audio_processors=1]] [[-DJUCE_MODULE_AVAILABLE_juce_audio_utils=1]] [[-DJUCE_MODULE_AVAILABLE_juce_box2d=1]] [[-DJUCE_MODULE_AVAILABLE_juce_core=1]] [[-DJUCE_MODULE_AVAILABLE_juce_cryptography=1]] [[-DJUCE_MODULE_AVAILABLE_juce_data_structures=1]] [[-DJUCE_MODULE_AVAILABLE_juce_dsp=1]] [[-DJUCE_MODULE_AVAILABLE_juce_events=1]] [[-DJUCE_MODULE_AVAILABLE_juce_graphics=1]] [[-DJUCE_MODULE_AVAILABLE_juce_gui_basics=1]] [[-DJUCE_MODULE_AVAILABLE_juce_gui_extra=1]] [[-DJUCE_MODULE_AVAILABLE_juce_javascript=1]] [[-DJUCE_MODULE_AVAILABLE_juce_midi_ci=1]] [[-DJUCE_MODULE_AVAILABLE_juce_opengl=1]] [[-DJUCE_MODULE_AVAILABLE_juce_osc=1]] [[-DJUCE_MODULE_AVAILABLE_juce_product_unlocking=1]] [[-DJUCE_MODULE_AVAILABLE_juce_video=1]] [[-DJUCE_GLOBAL_MODULE_SETTINGS_INCLUDED=1]] [[-DJUCE_USE_MP3AUDIOFORMAT=1]] [[-DJUCE_PLUGINHOST_VST3=1]] [[-DJUCE_PLUGINHOST_LV2=1]] [[-DJUCE_ALLOW_STATIC_NULL_VARIABLES=0]] [[-DJUCE_STRICT_REFCOUNTEDPOINTER=1]] [[-DJUCE_USE_CAMERA=1]] [[-DJUCE_STANDALONE_APPLICATION=1]] [[-DJUCE_DEMO_RUNNER=1]] [[-DJUCE_UNIT_TESTS=1]] [[-DJUCE_PUSH_NOTIFICATIONS=1]] [[-DJUCER_ANDROIDSTUDIO_7F0E4A25=1]] [[-DJUCE_APP_VERSION=8.0.8]] [[-DJUCE_APP_VERSION_HEX=0x80008]] [[-DNDEBUG=1]])
+    add_definitions([[-DJUCE_PROJUCER_VERSION=0x80008]] [[-DJUCE_MODULE_AVAILABLE_juce_analytics=1]] [[-DJUCE_MODULE_AVAILABLE_juce_animation=1]] [[-DJUCE_MODULE_AVAILABLE_juce_audio_basics=1]] [[-DJUCE_MODULE_AVAILABLE_juce_audio_devices=1]] [[-DJUCE_MODULE_AVAILABLE_juce_audio_formats=1]] [[-DJUCE_MODULE_AVAILABLE_juce_audio_processors=1]] [[-DJUCE_MODULE_AVAILABLE_juce_audio_utils=1]] [[-DJUCE_MODULE_AVAILABLE_juce_box2d=1]] [[-DJUCE_MODULE_AVAILABLE_juce_core=1]] [[-DJUCE_MODULE_AVAILABLE_juce_cryptography=1]] [[-DJUCE_MODULE_AVAILABLE_juce_data_structures=1]] [[-DJUCE_MODULE_AVAILABLE_juce_dsp=1]] [[-DJUCE_MODULE_AVAILABLE_juce_events=1]] [[-DJUCE_MODULE_AVAILABLE_juce_graphics=1]] [[-DJUCE_MODULE_AVAILABLE_juce_gui_basics=1]] [[-DJUCE_MODULE_AVAILABLE_juce_gui_extra=1]] [[-DJUCE_MODULE_AVAILABLE_juce_javascript=1]] [[-DJUCE_MODULE_AVAILABLE_juce_midi_ci=1]] [[-DJUCE_MODULE_AVAILABLE_juce_opengl=1]] [[-DJUCE_MODULE_AVAILABLE_juce_osc=1]] [[-DJUCE_MODULE_AVAILABLE_juce_product_unlocking=1]] [[-DJUCE_MODULE_AVAILABLE_juce_video=1]] [[-DJUCE_GLOBAL_MODULE_SETTINGS_INCLUDED=1]] [[-DJUCE_USE_MP3AUDIOFORMAT=1]] [[-DJUCE_PLUGINHOST_VST3=1]] [[-DJUCE_PLUGINHOST_AU=1]] [[-DJUCE_PLUGINHOST_LV2=1]] [[-DJUCE_ALLOW_STATIC_NULL_VARIABLES=0]] [[-DJUCE_STRICT_REFCOUNTEDPOINTER=1]] [[-DJUCE_USE_CAMERA=1]] [[-DJUCE_STANDALONE_APPLICATION=1]] [[-DJUCE_DEMO_RUNNER=1]] [[-DJUCE_UNIT_TESTS=1]] [[-DJUCE_PUSH_NOTIFICATIONS=1]] [[-DJUCER_ANDROIDSTUDIO_7F0E4A25=1]] [[-DJUCE_APP_VERSION=8.0.8]] [[-DJUCE_APP_VERSION_HEX=0x80008]] [[-DNDEBUG=1]])
 else()
     message( FATAL_ERROR "No matching build-configuration found." )
 endif()
@@ -782,6 +782,7 @@ add_library( ${BINARY_NAME}
     "../../../../../modules/juce_audio_processors/format_types/juce_AU_Shared.h"
     "../../../../../modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat.h"
     "../../../../../modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat.mm"
+    "../../../../../modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat_test.cpp"
     "../../../../../modules/juce_audio_processors/format_types/juce_LADSPAPluginFormat.cpp"
     "../../../../../modules/juce_audio_processors/format_types/juce_LADSPAPluginFormat.h"
     "../../../../../modules/juce_audio_processors/format_types/juce_LegacyAudioParameter.cpp"
@@ -3443,6 +3444,7 @@ set_source_files_properties(
     "../../../../../modules/juce_audio_processors/format_types/juce_AU_Shared.h"
     "../../../../../modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat.h"
     "../../../../../modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat.mm"
+    "../../../../../modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat_test.cpp"
     "../../../../../modules/juce_audio_processors/format_types/juce_LADSPAPluginFormat.cpp"
     "../../../../../modules/juce_audio_processors/format_types/juce_LADSPAPluginFormat.h"
     "../../../../../modules/juce_audio_processors/format_types/juce_LegacyAudioParameter.cpp"

examples/DemoRunner/Builds/LinuxMakefile/Makefile

@@ -39,7 +39,7 @@ ifeq ($(CONFIG),Debug)
     TARGET_ARCH := 
   endif
 
-  JUCE_CPPFLAGS := $(DEPFLAGS) "-DLINUX=1" "-DDEBUG=1" "-D_DEBUG=1" "-DJUCE_PROJUCER_VERSION=0x80008" "-DJUCE_MODULE_AVAILABLE_juce_analytics=1" "-DJUCE_MODULE_AVAILABLE_juce_animation=1" "-DJUCE_MODULE_AVAILABLE_juce_audio_basics=1" "-DJUCE_MODULE_AVAILABLE_juce_audio_devices=1" "-DJUCE_MODULE_AVAILABLE_juce_audio_formats=1" "-DJUCE_MODULE_AVAILABLE_juce_audio_processors=1" "-DJUCE_MODULE_AVAILABLE_juce_audio_utils=1" "-DJUCE_MODULE_AVAILABLE_juce_box2d=1" "-DJUCE_MODULE_AVAILABLE_juce_core=1" "-DJUCE_MODULE_AVAILABLE_juce_cryptography=1" "-DJUCE_MODULE_AVAILABLE_juce_data_structures=1" "-DJUCE_MODULE_AVAILABLE_juce_dsp=1" "-DJUCE_MODULE_AVAILABLE_juce_events=1" "-DJUCE_MODULE_AVAILABLE_juce_graphics=1" "-DJUCE_MODULE_AVAILABLE_juce_gui_basics=1" "-DJUCE_MODULE_AVAILABLE_juce_gui_extra=1" "-DJUCE_MODULE_AVAILABLE_juce_javascript=1" "-DJUCE_MODULE_AVAILABLE_juce_midi_ci=1" "-DJUCE_MODULE_AVAILABLE_juce_opengl=1" "-DJUCE_MODULE_AVAILABLE_juce_osc=1" "-DJUCE_MODULE_AVAILABLE_juce_product_unlocking=1" "-DJUCE_MODULE_AVAILABLE_juce_video=1" "-DJUCE_GLOBAL_MODULE_SETTINGS_INCLUDED=1" "-DJUCE_USE_MP3AUDIOFORMAT=1" "-DJUCE_PLUGINHOST_VST3=1" "-DJUCE_PLUGINHOST_LV2=1" "-DJUCE_ALLOW_STATIC_NULL_VARIABLES=0" "-DJUCE_STRICT_REFCOUNTEDPOINTER=1" "-DJUCE_USE_CAMERA=1" "-DJUCE_STANDALONE_APPLICATION=1" "-DJUCE_DEMO_RUNNER=1" "-DJUCE_UNIT_TESTS=1" "-DJUCE_PUSH_NOTIFICATIONS=1" "-DJUCER_LINUX_MAKE_6D53C8B4=1" "-DJUCE_APP_VERSION=8.0.8" "-DJUCE_APP_VERSION_HEX=0x80008" $(shell $(PKG_CONFIG) --cflags $(shell ($(PKG_CONFIG) --exists webkit2gtk-4.1 && echo webkit2gtk-4.1) || echo webkit2gtk-4.0) alsa freetype2 fontconfig gl libcurl gtk+-x11-3.0) -pthread -I../../../../modules/juce_audio_processors/format_types/LV2_SDK/lilv/src -I../../../../modules/juce_audio_processors/format_types/LV2_SDK/lilv -I../../../../modules/juce_audio_processors/format_types/LV2_SDK/sratom -I../../../../modules/juce_audio_processors/format_types/LV2_SDK/sord/src -I../../../../modules/juce_audio_processors/format_types/LV2_SDK/sord -I../../../../modules/juce_audio_processors/format_types/LV2_SDK/serd -I../../../../modules/juce_audio_processors/format_types/LV2_SDK/lv2 -I../../../../modules/juce_audio_processors/format_types/LV2_SDK -I../../../../modules/juce_audio_processors/format_types/VST3_SDK -I../../JuceLibraryCode -I../../../../modules $(CPPFLAGS)
+  JUCE_CPPFLAGS := $(DEPFLAGS) "-DLINUX=1" "-DDEBUG=1" "-D_DEBUG=1" "-DJUCE_PROJUCER_VERSION=0x80008" "-DJUCE_MODULE_AVAILABLE_juce_analytics=1" "-DJUCE_MODULE_AVAILABLE_juce_animation=1" "-DJUCE_MODULE_AVAILABLE_juce_audio_basics=1" "-DJUCE_MODULE_AVAILABLE_juce_audio_devices=1" "-DJUCE_MODULE_AVAILABLE_juce_audio_formats=1" "-DJUCE_MODULE_AVAILABLE_juce_audio_processors=1" "-DJUCE_MODULE_AVAILABLE_juce_audio_utils=1" "-DJUCE_MODULE_AVAILABLE_juce_box2d=1" "-DJUCE_MODULE_AVAILABLE_juce_core=1" "-DJUCE_MODULE_AVAILABLE_juce_cryptography=1" "-DJUCE_MODULE_AVAILABLE_juce_data_structures=1" "-DJUCE_MODULE_AVAILABLE_juce_dsp=1" "-DJUCE_MODULE_AVAILABLE_juce_events=1" "-DJUCE_MODULE_AVAILABLE_juce_graphics=1" "-DJUCE_MODULE_AVAILABLE_juce_gui_basics=1" "-DJUCE_MODULE_AVAILABLE_juce_gui_extra=1" "-DJUCE_MODULE_AVAILABLE_juce_javascript=1" "-DJUCE_MODULE_AVAILABLE_juce_midi_ci=1" "-DJUCE_MODULE_AVAILABLE_juce_opengl=1" "-DJUCE_MODULE_AVAILABLE_juce_osc=1" "-DJUCE_MODULE_AVAILABLE_juce_product_unlocking=1" "-DJUCE_MODULE_AVAILABLE_juce_video=1" "-DJUCE_GLOBAL_MODULE_SETTINGS_INCLUDED=1" "-DJUCE_USE_MP3AUDIOFORMAT=1" "-DJUCE_PLUGINHOST_VST3=1" "-DJUCE_PLUGINHOST_AU=1" "-DJUCE_PLUGINHOST_LV2=1" "-DJUCE_ALLOW_STATIC_NULL_VARIABLES=0" "-DJUCE_STRICT_REFCOUNTEDPOINTER=1" "-DJUCE_USE_CAMERA=1" "-DJUCE_STANDALONE_APPLICATION=1" "-DJUCE_DEMO_RUNNER=1" "-DJUCE_UNIT_TESTS=1" "-DJUCE_PUSH_NOTIFICATIONS=1" "-DJUCER_LINUX_MAKE_6D53C8B4=1" "-DJUCE_APP_VERSION=8.0.8" "-DJUCE_APP_VERSION_HEX=0x80008" $(shell $(PKG_CONFIG) --cflags $(shell ($(PKG_CONFIG) --exists webkit2gtk-4.1 && echo webkit2gtk-4.1) || echo webkit2gtk-4.0) alsa freetype2 fontconfig gl libcurl gtk+-x11-3.0) -pthread -I../../../../modules/juce_audio_processors/format_types/LV2_SDK/lilv/src -I../../../../modules/juce_audio_processors/format_types/LV2_SDK/lilv -I../../../../modules/juce_audio_processors/format_types/LV2_SDK/sratom -I../../../../modules/juce_audio_processors/format_types/LV2_SDK/sord/src -I../../../../modules/juce_audio_processors/format_types/LV2_SDK/sord -I../../../../modules/juce_audio_processors/format_types/LV2_SDK/serd -I../../../../modules/juce_audio_processors/format_types/LV2_SDK/lv2 -I../../../../modules/juce_audio_processors/format_types/LV2_SDK -I../../../../modules/juce_audio_processors/format_types/VST3_SDK -I../../JuceLibraryCode -I../../../../modules $(CPPFLAGS)
   JUCE_CPPFLAGS_APP :=  "-DJucePlugin_Build_VST=0" "-DJucePlugin_Build_VST3=0" "-DJucePlugin_Build_AU=0" "-DJucePlugin_Build_AUv3=0" "-DJucePlugin_Build_AAX=0" "-DJucePlugin_Build_Standalone=0" "-DJucePlugin_Build_Unity=0" "-DJucePlugin_Build_LV2=0"
   JUCE_TARGET_APP := DemoRunner
 
@@ -60,7 +60,7 @@ ifeq ($(CONFIG),Release)
     TARGET_ARCH := 
   endif
 
-  JUCE_CPPFLAGS := $(DEPFLAGS) "-DLINUX=1" "-DNDEBUG=1" "-DJUCE_PROJUCER_VERSION=0x80008" "-DJUCE_MODULE_AVAILABLE_juce_analytics=1" "-DJUCE_MODULE_AVAILABLE_juce_animation=1" "-DJUCE_MODULE_AVAILABLE_juce_audio_basics=1" "-DJUCE_MODULE_AVAILABLE_juce_audio_devices=1" "-DJUCE_MODULE_AVAILABLE_juce_audio_formats=1" "-DJUCE_MODULE_AVAILABLE_juce_audio_processors=1" "-DJUCE_MODULE_AVAILABLE_juce_audio_utils=1" "-DJUCE_MODULE_AVAILABLE_juce_box2d=1" "-DJUCE_MODULE_AVAILABLE_juce_core=1" "-DJUCE_MODULE_AVAILABLE_juce_cryptography=1" "-DJUCE_MODULE_AVAILABLE_juce_data_structures=1" "-DJUCE_MODULE_AVAILABLE_juce_dsp=1" "-DJUCE_MODULE_AVAILABLE_juce_events=1" "-DJUCE_MODULE_AVAILABLE_juce_graphics=1" "-DJUCE_MODULE_AVAILABLE_juce_gui_basics=1" "-DJUCE_MODULE_AVAILABLE_juce_gui_extra=1" "-DJUCE_MODULE_AVAILABLE_juce_javascript=1" "-DJUCE_MODULE_AVAILABLE_juce_midi_ci=1" "-DJUCE_MODULE_AVAILABLE_juce_opengl=1" "-DJUCE_MODULE_AVAILABLE_juce_osc=1" "-DJUCE_MODULE_AVAILABLE_juce_product_unlocking=1" "-DJUCE_MODULE_AVAILABLE_juce_video=1" "-DJUCE_GLOBAL_MODULE_SETTINGS_INCLUDED=1" "-DJUCE_USE_MP3AUDIOFORMAT=1" "-DJUCE_PLUGINHOST_VST3=1" "-DJUCE_PLUGINHOST_LV2=1" "-DJUCE_ALLOW_STATIC_NULL_VARIABLES=0" "-DJUCE_STRICT_REFCOUNTEDPOINTER=1" "-DJUCE_USE_CAMERA=1" "-DJUCE_STANDALONE_APPLICATION=1" "-DJUCE_DEMO_RUNNER=1" "-DJUCE_UNIT_TESTS=1" "-DJUCE_PUSH_NOTIFICATIONS=1" "-DJUCER_LINUX_MAKE_6D53C8B4=1" "-DJUCE_APP_VERSION=8.0.8" "-DJUCE_APP_VERSION_HEX=0x80008" $(shell $(PKG_CONFIG) --cflags $(shell ($(PKG_CONFIG) --exists webkit2gtk-4.1 && echo webkit2gtk-4.1) || echo webkit2gtk-4.0) alsa freetype2 fontconfig gl libcurl gtk+-x11-3.0) -pthread -I../../../../modules/juce_audio_processors/format_types/LV2_SDK/lilv/src -I../../../../modules/juce_audio_processors/format_types/LV2_SDK/lilv -I../../../../modules/juce_audio_processors/format_types/LV2_SDK/sratom -I../../../../modules/juce_audio_processors/format_types/LV2_SDK/sord/src -I../../../../modules/juce_audio_processors/format_types/LV2_SDK/sord -I../../../../modules/juce_audio_processors/format_types/LV2_SDK/serd -I../../../../modules/juce_audio_processors/format_types/LV2_SDK/lv2 -I../../../../modules/juce_audio_processors/format_types/LV2_SDK -I../../../../modules/juce_audio_processors/format_types/VST3_SDK -I../../JuceLibraryCode -I../../../../modules $(CPPFLAGS)
+  JUCE_CPPFLAGS := $(DEPFLAGS) "-DLINUX=1" "-DNDEBUG=1" "-DJUCE_PROJUCER_VERSION=0x80008" "-DJUCE_MODULE_AVAILABLE_juce_analytics=1" "-DJUCE_MODULE_AVAILABLE_juce_animation=1" "-DJUCE_MODULE_AVAILABLE_juce_audio_basics=1" "-DJUCE_MODULE_AVAILABLE_juce_audio_devices=1" "-DJUCE_MODULE_AVAILABLE_juce_audio_formats=1" "-DJUCE_MODULE_AVAILABLE_juce_audio_processors=1" "-DJUCE_MODULE_AVAILABLE_juce_audio_utils=1" "-DJUCE_MODULE_AVAILABLE_juce_box2d=1" "-DJUCE_MODULE_AVAILABLE_juce_core=1" "-DJUCE_MODULE_AVAILABLE_juce_cryptography=1" "-DJUCE_MODULE_AVAILABLE_juce_data_structures=1" "-DJUCE_MODULE_AVAILABLE_juce_dsp=1" "-DJUCE_MODULE_AVAILABLE_juce_events=1" "-DJUCE_MODULE_AVAILABLE_juce_graphics=1" "-DJUCE_MODULE_AVAILABLE_juce_gui_basics=1" "-DJUCE_MODULE_AVAILABLE_juce_gui_extra=1" "-DJUCE_MODULE_AVAILABLE_juce_javascript=1" "-DJUCE_MODULE_AVAILABLE_juce_midi_ci=1" "-DJUCE_MODULE_AVAILABLE_juce_opengl=1" "-DJUCE_MODULE_AVAILABLE_juce_osc=1" "-DJUCE_MODULE_AVAILABLE_juce_product_unlocking=1" "-DJUCE_MODULE_AVAILABLE_juce_video=1" "-DJUCE_GLOBAL_MODULE_SETTINGS_INCLUDED=1" "-DJUCE_USE_MP3AUDIOFORMAT=1" "-DJUCE_PLUGINHOST_VST3=1" "-DJUCE_PLUGINHOST_AU=1" "-DJUCE_PLUGINHOST_LV2=1" "-DJUCE_ALLOW_STATIC_NULL_VARIABLES=0" "-DJUCE_STRICT_REFCOUNTEDPOINTER=1" "-DJUCE_USE_CAMERA=1" "-DJUCE_STANDALONE_APPLICATION=1" "-DJUCE_DEMO_RUNNER=1" "-DJUCE_UNIT_TESTS=1" "-DJUCE_PUSH_NOTIFICATIONS=1" "-DJUCER_LINUX_MAKE_6D53C8B4=1" "-DJUCE_APP_VERSION=8.0.8" "-DJUCE_APP_VERSION_HEX=0x80008" $(shell $(PKG_CONFIG) --cflags $(shell ($(PKG_CONFIG) --exists webkit2gtk-4.1 && echo webkit2gtk-4.1) || echo webkit2gtk-4.0) alsa freetype2 fontconfig gl libcurl gtk+-x11-3.0) -pthread -I../../../../modules/juce_audio_processors/format_types/LV2_SDK/lilv/src -I../../../../modules/juce_audio_processors/format_types/LV2_SDK/lilv -I../../../../modules/juce_audio_processors/format_types/LV2_SDK/sratom -I../../../../modules/juce_audio_processors/format_types/LV2_SDK/sord/src -I../../../../modules/juce_audio_processors/format_types/LV2_SDK/sord -I../../../../modules/juce_audio_processors/format_types/LV2_SDK/serd -I../../../../modules/juce_audio_processors/format_types/LV2_SDK/lv2 -I../../../../modules/juce_audio_processors/format_types/LV2_SDK -I../../../../modules/juce_audio_processors/format_types/VST3_SDK -I../../JuceLibraryCode -I../../../../modules $(CPPFLAGS)
   JUCE_CPPFLAGS_APP :=  "-DJucePlugin_Build_VST=0" "-DJucePlugin_Build_VST3=0" "-DJucePlugin_Build_AU=0" "-DJucePlugin_Build_AUv3=0" "-DJucePlugin_Build_AAX=0" "-DJucePlugin_Build_Standalone=0" "-DJucePlugin_Build_Unity=0" "-DJucePlugin_Build_LV2=0"
   JUCE_TARGET_APP := DemoRunner
 

examples/DemoRunner/Builds/MacOSX/DemoRunner.xcodeproj/project.pbxproj

@@ -29,6 +29,7 @@
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@@ -97,6 +98,7 @@
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examples/DemoRunner/Builds/VisualStudio2019/DemoRunner_App.vcxproj

@@ -68,7 +68,7 @@
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     <ResourceCompile>
       <AdditionalIncludeDirectories>..\..\..\..\modules\juce_audio_processors\format_types\LV2_SDK\lilv\src;..\..\..\..\modules\juce_audio_processors\format_types\LV2_SDK\lilv;..\..\..\..\modules\juce_audio_processors\format_types\LV2_SDK\sratom;..\..\..\..\modules\juce_audio_processors\format_types\LV2_SDK\sord\src;..\..\..\..\modules\juce_audio_processors\format_types\LV2_SDK\sord;..\..\..\..\modules\juce_audio_processors\format_types\LV2_SDK\serd;..\..\..\..\modules\juce_audio_processors\format_types\LV2_SDK\lv2;..\..\..\..\modules\juce_audio_processors\format_types\LV2_SDK;..\..\..\..\modules\juce_audio_processors\format_types\VST3_SDK;..\..\JuceLibraryCode;..\..\..\..\modules;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>_CRT_SECURE_NO_WARNINGS;WIN32;_WINDOWS;NDEBUG;JUCE_PROJUCER_VERSION=0x80008;JUCE_MODULE_AVAILABLE_juce_analytics=1;JUCE_MODULE_AVAILABLE_juce_animation=1;JUCE_MODULE_AVAILABLE_juce_audio_basics=1;JUCE_MODULE_AVAILABLE_juce_audio_devices=1;JUCE_MODULE_AVAILABLE_juce_audio_formats=1;JUCE_MODULE_AVAILABLE_juce_audio_processors=1;JUCE_MODULE_AVAILABLE_juce_audio_utils=1;JUCE_MODULE_AVAILABLE_juce_box2d=1;JUCE_MODULE_AVAILABLE_juce_core=1;JUCE_MODULE_AVAILABLE_juce_cryptography=1;JUCE_MODULE_AVAILABLE_juce_data_structures=1;JUCE_MODULE_AVAILABLE_juce_dsp=1;JUCE_MODULE_AVAILABLE_juce_events=1;JUCE_MODULE_AVAILABLE_juce_graphics=1;JUCE_MODULE_AVAILABLE_juce_gui_basics=1;JUCE_MODULE_AVAILABLE_juce_gui_extra=1;JUCE_MODULE_AVAILABLE_juce_javascript=1;JUCE_MODULE_AVAILABLE_juce_midi_ci=1;JUCE_MODULE_AVAILABLE_juce_opengl=1;JUCE_MODULE_AVAILABLE_juce_osc=1;JUCE_MODULE_AVAILABLE_juce_product_unlocking=1;JUCE_MODULE_AVAILABLE_juce_video=1;JUCE_GLOBAL_MODULE_SETTINGS_INCLUDED=1;JUCE_USE_MP3AUDIOFORMAT=1;JUCE_PLUGINHOST_VST3=1;JUCE_PLUGINHOST_LV2=1;JUCE_ALLOW_STATIC_NULL_VARIABLES=0;JUCE_STRICT_REFCOUNTEDPOINTER=1;JUCE_USE_CAMERA=1;JUCE_STANDALONE_APPLICATION=1;JUCE_DEMO_RUNNER=1;JUCE_UNIT_TESTS=1;JUCE_PUSH_NOTIFICATIONS=1;JUCER_VS2022_78A503E=1;JUCE_APP_VERSION=8.0.8;JUCE_APP_VERSION_HEX=0x80008;JucePlugin_Build_VST=0;JucePlugin_Build_VST3=0;JucePlugin_Build_AU=0;JucePlugin_Build_AUv3=0;JucePlugin_Build_AAX=0;JucePlugin_Build_Standalone=0;JucePlugin_Build_Unity=0;JucePlugin_Build_LV2=0;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>_CRT_SECURE_NO_WARNINGS;WIN32;_WINDOWS;NDEBUG;JUCE_PROJUCER_VERSION=0x80008;JUCE_MODULE_AVAILABLE_juce_analytics=1;JUCE_MODULE_AVAILABLE_juce_animation=1;JUCE_MODULE_AVAILABLE_juce_audio_basics=1;JUCE_MODULE_AVAILABLE_juce_audio_devices=1;JUCE_MODULE_AVAILABLE_juce_audio_formats=1;JUCE_MODULE_AVAILABLE_juce_audio_processors=1;JUCE_MODULE_AVAILABLE_juce_audio_utils=1;JUCE_MODULE_AVAILABLE_juce_box2d=1;JUCE_MODULE_AVAILABLE_juce_core=1;JUCE_MODULE_AVAILABLE_juce_cryptography=1;JUCE_MODULE_AVAILABLE_juce_data_structures=1;JUCE_MODULE_AVAILABLE_juce_dsp=1;JUCE_MODULE_AVAILABLE_juce_events=1;JUCE_MODULE_AVAILABLE_juce_graphics=1;JUCE_MODULE_AVAILABLE_juce_gui_basics=1;JUCE_MODULE_AVAILABLE_juce_gui_extra=1;JUCE_MODULE_AVAILABLE_juce_javascript=1;JUCE_MODULE_AVAILABLE_juce_midi_ci=1;JUCE_MODULE_AVAILABLE_juce_opengl=1;JUCE_MODULE_AVAILABLE_juce_osc=1;JUCE_MODULE_AVAILABLE_juce_product_unlocking=1;JUCE_MODULE_AVAILABLE_juce_video=1;JUCE_GLOBAL_MODULE_SETTINGS_INCLUDED=1;JUCE_USE_MP3AUDIOFORMAT=1;JUCE_PLUGINHOST_VST3=1;JUCE_PLUGINHOST_AU=1;JUCE_PLUGINHOST_LV2=1;JUCE_ALLOW_STATIC_NULL_VARIABLES=0;JUCE_STRICT_REFCOUNTEDPOINTER=1;JUCE_USE_CAMERA=1;JUCE_STANDALONE_APPLICATION=1;JUCE_DEMO_RUNNER=1;JUCE_UNIT_TESTS=1;JUCE_PUSH_NOTIFICATIONS=1;JUCER_VS2022_78A503E=1;JUCE_APP_VERSION=8.0.8;JUCE_APP_VERSION_HEX=0x80008;JucePlugin_Build_VST=0;JucePlugin_Build_VST3=0;JucePlugin_Build_AU=0;JucePlugin_Build_AUv3=0;JucePlugin_Build_AAX=0;JucePlugin_Build_Standalone=0;JucePlugin_Build_Unity=0;JucePlugin_Build_LV2=0;%(PreprocessorDefinitions)</PreprocessorDefinitions>
     </ResourceCompile>
     <Link>
       <OutputFile>$(OutDir)\DemoRunner.exe</OutputFile>
@@ -990,6 +990,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_ARAHosting.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_AudioUnitPluginFormat_test.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_LADSPAPluginFormat.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>

examples/DemoRunner/Builds/VisualStudio2022/DemoRunner_App.vcxproj.filters

@@ -1693,6 +1693,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_AudioUnitPluginFormat.mm">
       <Filter>JUCE Modules\juce_audio_processors\format_types</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_AudioUnitPluginFormat_test.cpp">
+      <Filter>JUCE Modules\juce_audio_processors\format_types</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_LADSPAPluginFormat.cpp">
       <Filter>JUCE Modules\juce_audio_processors\format_types</Filter>
     </ClCompile>

examples/DemoRunner/Builds/iOS/App.entitlements

@@ -2,6 +2,8 @@
 <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 <plist version="1.0">
 <dict>
+	<key>inter-app-audio</key>
+	<true/>
 	<key>com.apple.developer.icloud-container-identifiers</key>
 	<array>
         <string>iCloud.$(CFBundleIdentifier)</string>

examples/DemoRunner/Builds/iOS/DemoRunner.xcodeproj/project.pbxproj

@@ -410,7 +410,7 @@
 								enabled = 0;
 							};
 							com.apple.InterAppAudio = {
-								enabled = 0;
+								enabled = 1;
 							};
 							com.apple.Push = {
 								enabled = 0;
@@ -588,6 +588,7 @@
 					"JUCE_GLOBAL_MODULE_SETTINGS_INCLUDED=1",
 					"JUCE_USE_MP3AUDIOFORMAT=1",
 					"JUCE_PLUGINHOST_VST3=1",
+					"JUCE_PLUGINHOST_AU=1",
 					"JUCE_PLUGINHOST_LV2=1",
 					"JUCE_ALLOW_STATIC_NULL_VARIABLES=0",
 					"JUCE_STRICT_REFCOUNTEDPOINTER=1",
@@ -682,6 +683,7 @@
 					"JUCE_GLOBAL_MODULE_SETTINGS_INCLUDED=1",
 					"JUCE_USE_MP3AUDIOFORMAT=1",
 					"JUCE_PLUGINHOST_VST3=1",
+					"JUCE_PLUGINHOST_AU=1",
 					"JUCE_PLUGINHOST_LV2=1",
 					"JUCE_ALLOW_STATIC_NULL_VARIABLES=0",
 					"JUCE_STRICT_REFCOUNTEDPOINTER=1",

examples/DemoRunner/CMakeLists.txt

@@ -54,6 +54,7 @@ target_compile_definitions(DemoRunner PRIVATE
     JUCE_ALLOW_STATIC_NULL_VARIABLES=0
     JUCE_CONTENT_SHARING=1
     JUCE_DEMO_RUNNER=1
+    JUCE_PLUGINHOST_AU=1
     JUCE_PLUGINHOST_LV2=1
     JUCE_PLUGINHOST_VST3=1
     JUCE_PUSH_NOTIFICATIONS=1

examples/DemoRunner/DemoRunner.jucer

@@ -257,7 +257,8 @@
     <MODULE id="juce_video" showAllCode="1" useLocalCopy="0" useGlobalPath="0"/>
   </MODULES>
   <JUCEOPTIONS JUCE_USE_CAMERA="1" JUCE_USE_MP3AUDIOFORMAT="1" JUCE_ALLOW_STATIC_NULL_VARIABLES="0"
-               JUCE_STRICT_REFCOUNTEDPOINTER="1" JUCE_PLUGINHOST_LV2="1" JUCE_PLUGINHOST_VST3="1"/>
+               JUCE_STRICT_REFCOUNTEDPOINTER="1" JUCE_PLUGINHOST_LV2="1" JUCE_PLUGINHOST_VST3="1"
+               JUCE_PLUGINHOST_AU="1"/>
   <LIVE_SETTINGS>
     <OSX/>
   </LIVE_SETTINGS>

extras/AudioPerformanceTest/Builds/Android/app/CMakeLists.txt

@@ -737,6 +737,7 @@ add_library( ${BINARY_NAME}
     "../../../../../modules/juce_audio_processors/format_types/juce_AU_Shared.h"
     "../../../../../modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat.h"
     "../../../../../modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat.mm"
+    "../../../../../modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat_test.cpp"
     "../../../../../modules/juce_audio_processors/format_types/juce_LADSPAPluginFormat.cpp"
     "../../../../../modules/juce_audio_processors/format_types/juce_LADSPAPluginFormat.h"
     "../../../../../modules/juce_audio_processors/format_types/juce_LegacyAudioParameter.cpp"
@@ -3012,6 +3013,7 @@ set_source_files_properties(
     "../../../../../modules/juce_audio_processors/format_types/juce_AU_Shared.h"
     "../../../../../modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat.h"
     "../../../../../modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat.mm"
+    "../../../../../modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat_test.cpp"
     "../../../../../modules/juce_audio_processors/format_types/juce_LADSPAPluginFormat.cpp"
     "../../../../../modules/juce_audio_processors/format_types/juce_LADSPAPluginFormat.h"
     "../../../../../modules/juce_audio_processors/format_types/juce_LegacyAudioParameter.cpp"

extras/AudioPerformanceTest/Builds/VisualStudio2022/AudioPerformanceTest_App.vcxproj

@@ -948,6 +948,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_ARAHosting.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_AudioUnitPluginFormat_test.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_LADSPAPluginFormat.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>

extras/AudioPerformanceTest/Builds/VisualStudio2022/AudioPerformanceTest_App.vcxproj.filters

@@ -1474,6 +1474,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_AudioUnitPluginFormat.mm">
       <Filter>JUCE Modules\juce_audio_processors\format_types</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_AudioUnitPluginFormat_test.cpp">
+      <Filter>JUCE Modules\juce_audio_processors\format_types</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_LADSPAPluginFormat.cpp">
       <Filter>JUCE Modules\juce_audio_processors\format_types</Filter>
     </ClCompile>

extras/AudioPluginHost/Builds/Android/app/CMakeLists.txt

@@ -770,6 +770,7 @@ add_library( ${BINARY_NAME}
     "../../../../../modules/juce_audio_processors/format_types/juce_AU_Shared.h"
     "../../../../../modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat.h"
     "../../../../../modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat.mm"
+    "../../../../../modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat_test.cpp"
     "../../../../../modules/juce_audio_processors/format_types/juce_LADSPAPluginFormat.cpp"
     "../../../../../modules/juce_audio_processors/format_types/juce_LADSPAPluginFormat.h"
     "../../../../../modules/juce_audio_processors/format_types/juce_LegacyAudioParameter.cpp"
@@ -3198,6 +3199,7 @@ set_source_files_properties(
     "../../../../../modules/juce_audio_processors/format_types/juce_AU_Shared.h"
     "../../../../../modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat.h"
     "../../../../../modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat.mm"
+    "../../../../../modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat_test.cpp"
     "../../../../../modules/juce_audio_processors/format_types/juce_LADSPAPluginFormat.cpp"
     "../../../../../modules/juce_audio_processors/format_types/juce_LADSPAPluginFormat.h"
     "../../../../../modules/juce_audio_processors/format_types/juce_LegacyAudioParameter.cpp"

extras/AudioPluginHost/Builds/VisualStudio2019/AudioPluginHost_App.vcxproj

@@ -956,6 +956,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_ARAHosting.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_AudioUnitPluginFormat_test.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_LADSPAPluginFormat.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>

extras/AudioPluginHost/Builds/VisualStudio2019/AudioPluginHost_App.vcxproj.filters

@@ -1549,6 +1549,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_AudioUnitPluginFormat.mm">
       <Filter>JUCE Modules\juce_audio_processors\format_types</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_AudioUnitPluginFormat_test.cpp">
+      <Filter>JUCE Modules\juce_audio_processors\format_types</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_LADSPAPluginFormat.cpp">
       <Filter>JUCE Modules\juce_audio_processors\format_types</Filter>
     </ClCompile>

extras/AudioPluginHost/Builds/VisualStudio2022/AudioPluginHost_App.vcxproj

@@ -956,6 +956,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_ARAHosting.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_AudioUnitPluginFormat_test.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_LADSPAPluginFormat.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>

extras/AudioPluginHost/Builds/VisualStudio2022/AudioPluginHost_App.vcxproj.filters

@@ -1549,6 +1549,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_AudioUnitPluginFormat.mm">
       <Filter>JUCE Modules\juce_audio_processors\format_types</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_AudioUnitPluginFormat_test.cpp">
+      <Filter>JUCE Modules\juce_audio_processors\format_types</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_LADSPAPluginFormat.cpp">
       <Filter>JUCE Modules\juce_audio_processors\format_types</Filter>
     </ClCompile>

extras/NetworkGraphicsDemo/Builds/Android/app/CMakeLists.txt

@@ -741,6 +741,7 @@ add_library( ${BINARY_NAME}
     "../../../../../modules/juce_audio_processors/format_types/juce_AU_Shared.h"
     "../../../../../modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat.h"
     "../../../../../modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat.mm"
+    "../../../../../modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat_test.cpp"
     "../../../../../modules/juce_audio_processors/format_types/juce_LADSPAPluginFormat.cpp"
     "../../../../../modules/juce_audio_processors/format_types/juce_LADSPAPluginFormat.h"
     "../../../../../modules/juce_audio_processors/format_types/juce_LegacyAudioParameter.cpp"
@@ -3096,6 +3097,7 @@ set_source_files_properties(
     "../../../../../modules/juce_audio_processors/format_types/juce_AU_Shared.h"
     "../../../../../modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat.h"
     "../../../../../modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat.mm"
+    "../../../../../modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat_test.cpp"
     "../../../../../modules/juce_audio_processors/format_types/juce_LADSPAPluginFormat.cpp"
     "../../../../../modules/juce_audio_processors/format_types/juce_LADSPAPluginFormat.h"
     "../../../../../modules/juce_audio_processors/format_types/juce_LegacyAudioParameter.cpp"

extras/NetworkGraphicsDemo/Builds/VisualStudio2022/NetworkGraphicsDemo_App.vcxproj

@@ -948,6 +948,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_ARAHosting.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_AudioUnitPluginFormat_test.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_LADSPAPluginFormat.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>

extras/NetworkGraphicsDemo/Builds/VisualStudio2022/NetworkGraphicsDemo_App.vcxproj.filters

@@ -1504,6 +1504,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_AudioUnitPluginFormat.mm">
       <Filter>JUCE Modules\juce_audio_processors\format_types</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_AudioUnitPluginFormat_test.cpp">
+      <Filter>JUCE Modules\juce_audio_processors\format_types</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_LADSPAPluginFormat.cpp">
       <Filter>JUCE Modules\juce_audio_processors\format_types</Filter>
     </ClCompile>

extras/UnitTestRunner/Builds/VisualStudio2019/UnitTestRunner_ConsoleApp.vcxproj

@@ -964,6 +964,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_ARAHosting.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_AudioUnitPluginFormat_test.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_LADSPAPluginFormat.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>

extras/UnitTestRunner/Builds/VisualStudio2019/UnitTestRunner_ConsoleApp.vcxproj.filters

@@ -1597,6 +1597,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_AudioUnitPluginFormat.mm">
       <Filter>JUCE Modules\juce_audio_processors\format_types</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_AudioUnitPluginFormat_test.cpp">
+      <Filter>JUCE Modules\juce_audio_processors\format_types</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_LADSPAPluginFormat.cpp">
       <Filter>JUCE Modules\juce_audio_processors\format_types</Filter>
     </ClCompile>

extras/UnitTestRunner/Builds/VisualStudio2022/UnitTestRunner_ConsoleApp.vcxproj

@@ -964,6 +964,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_ARAHosting.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_AudioUnitPluginFormat_test.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_LADSPAPluginFormat.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>

extras/UnitTestRunner/Builds/VisualStudio2022/UnitTestRunner_ConsoleApp.vcxproj.filters

@@ -1597,6 +1597,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_AudioUnitPluginFormat.mm">
       <Filter>JUCE Modules\juce_audio_processors\format_types</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_AudioUnitPluginFormat_test.cpp">
+      <Filter>JUCE Modules\juce_audio_processors\format_types</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_LADSPAPluginFormat.cpp">
       <Filter>JUCE Modules\juce_audio_processors\format_types</Filter>
     </ClCompile>

extras/UnitTestRunner/CMakeLists.txt

@@ -37,6 +37,7 @@ juce_generate_juce_header(UnitTestRunner)
 target_sources(UnitTestRunner PRIVATE Source/Main.cpp)
 
 target_compile_definitions(UnitTestRunner PRIVATE
+    JUCE_PLUGINHOST_AU=1
     JUCE_PLUGINHOST_LV2=1
     JUCE_PLUGINHOST_VST3=1
     JUCE_UNIT_TESTS=1

extras/WindowsDLL/Builds/VisualStudio2022/WindowsDLL_DynamicLibrary.vcxproj

@@ -947,6 +947,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_ARAHosting.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_AudioUnitPluginFormat_test.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_LADSPAPluginFormat.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>

extras/WindowsDLL/Builds/VisualStudio2022/WindowsDLL_DynamicLibrary.vcxproj.filters

@@ -1501,6 +1501,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_AudioUnitPluginFormat.mm">
       <Filter>JUCE Modules\juce_audio_processors\format_types</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_AudioUnitPluginFormat_test.cpp">
+      <Filter>JUCE Modules\juce_audio_processors\format_types</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_audio_processors\format_types\juce_LADSPAPluginFormat.cpp">
       <Filter>JUCE Modules\juce_audio_processors\format_types</Filter>
     </ClCompile>

modules/juce_audio_plugin_client/juce_audio_plugin_client_AU_1.mm

@@ -172,7 +172,12 @@ public:
             channelInfo.add (info);
         }
        #else
-        channelInfo = AudioUnitHelpers::getAUChannelInfo (*juceFilter);
+        auto channelInfoSet = AudioUnitHelpers::getAUChannelInfo (*juceFilter);
+        channelInfo.resize ((int) channelInfoSet.size());
+        std::transform (channelInfoSet.begin(),
+                        channelInfoSet.end(),
+                        channelInfo.begin(),
+                        [] (auto x) { return x.makeChannelInfo(); });
        #endif
 
         AddPropertyListener (kAudioUnitProperty_ContextName, auPropertyListenerDispatcher, this);

modules/juce_audio_plugin_client/juce_audio_plugin_client_AUv3.mm

@@ -194,7 +194,13 @@ public:
             channelInfos.add (channelInfo);
         }
        #else
-        Array<AUChannelInfo> channelInfos = AudioUnitHelpers::getAUChannelInfo (processor);
+        auto channelInfoSet = AudioUnitHelpers::getAUChannelInfo (processor);
+        Array<AUChannelInfo> channelInfos;
+        channelInfos.resize ((int) channelInfoSet.size());
+        std::transform (channelInfoSet.begin(),
+                        channelInfoSet.end(),
+                        channelInfos.begin(),
+                        [] (auto x) { return x.makeChannelInfo(); });
        #endif
 
         processor.setPlayHead (this);

modules/juce_audio_processors/format_types/juce_AU_Shared.h

@@ -32,6 +32,8 @@
   ==============================================================================
 */
 
+#pragma once
+
 /** @cond */
 // This macro can be set if you need to override this internal name for some reason..
 #ifndef JUCE_STATE_DICTIONARY_KEY
@@ -363,7 +365,40 @@ struct AudioUnitHelpers
         return false;
     }
 
-    static Array<AUChannelInfo> getAUChannelInfo (const AudioProcessor& processor)
+    struct Channels
+    {
+        SInt16 ins, outs;
+
+        std::pair<SInt16, SInt16> makePair() const noexcept { return std::make_pair (ins, outs); }
+        AUChannelInfo makeChannelInfo() const noexcept { return { ins, outs }; }
+
+        bool operator<  (const Channels& other) const noexcept { return makePair() <  other.makePair(); }
+        bool operator== (const Channels& other) const noexcept { return makePair() == other.makePair(); }
+
+        // The 'standard' layout with the most channels defined is AudioChannelSet::create9point1point6().
+        // This value should be updated if larger standard channel layouts are added in the future.
+        static constexpr auto maxNumChanToCheckFor = 16;
+    };
+
+    /*  Removes non-wildcard layouts that are already included by other wildcard layouts.
+    */
+    static void removeNonWildcardLayouts (std::set<Channels>& layouts)
+    {
+        for (auto it = layouts.begin(); it != layouts.end();)
+        {
+            if ((it->ins != -1 && layouts.find ({ -1, it->outs }) != layouts.end())
+                || (it->outs != -1 && layouts.find ({ it->ins, -1 }) != layouts.end()))
+            {
+                it = layouts.erase (it);
+            }
+            else
+            {
+                ++it;
+            }
+        }
+    }
+
+    static std::set<Channels> getAUChannelInfo (const AudioProcessor& processor)
     {
        #ifdef JucePlugin_AUMainType
         JUCE_BEGIN_IGNORE_WARNINGS_GCC_LIKE ("-Wfour-char-constants")
@@ -372,131 +407,130 @@ struct AudioUnitHelpers
             // A MIDI effect requires an output bus in order to determine the sample rate.
             // No audio will be written to the output bus, so it can have any number of channels.
             // No input bus is required.
-            return { AUChannelInfo { 0, -1 } };
+            return { Channels { 0, -1 } };
         }
         JUCE_END_IGNORE_WARNINGS_GCC_LIKE
        #endif
 
-        Array<AUChannelInfo> channelInfo;
+        const auto defaultInputs  = processor.getChannelCountOfBus (true,  0);
+        const auto defaultOutputs = processor.getChannelCountOfBus (false, 0);
+        const auto hasMainInputBus  = (AudioUnitHelpers::getBusCountForWrapper (processor, true)  > 0);
+        const auto hasMainOutputBus = (AudioUnitHelpers::getBusCountForWrapper (processor, false) > 0);
 
-        auto hasMainInputBus  = (AudioUnitHelpers::getBusCountForWrapper (processor, true)  > 0);
+        std::set<Channels> supportedChannels;
-        auto hasMainOutputBus = (AudioUnitHelpers::getBusCountForWrapper (processor, false) > 0);
-
-        auto layout = processor.getBusesLayout();
-
-        // The 'standard' layout with the most channels defined is AudioChannelSet::create9point1point6().
-        // This value should be updated if larger standard channel layouts are added in the future.
-        constexpr auto maxNumChanToCheckFor = 16;
-
-        auto defaultInputs  = processor.getChannelCountOfBus (true,  0);
-        auto defaultOutputs = processor.getChannelCountOfBus (false, 0);
-
-        struct Channels
-        {
-            SInt16 ins, outs;
-
-            std::pair<SInt16, SInt16> makePair() const noexcept { return std::make_pair (ins, outs); }
-
-            bool operator<  (const Channels& other) const noexcept { return makePair() <  other.makePair(); }
-            bool operator== (const Channels& other) const noexcept { return makePair() == other.makePair(); }
-        };
-
-        SortedSet<Channels> supportedChannels;
 
         // add the current configuration
         if (defaultInputs != 0 || defaultOutputs != 0)
-            supportedChannels.add ({ static_cast<SInt16> (defaultInputs),
+            supportedChannels.insert ({ static_cast<SInt16> (defaultInputs),
                                         static_cast<SInt16> (defaultOutputs) });
 
-        for (auto inChanNum = hasMainInputBus ? 1 : 0; inChanNum <= (hasMainInputBus ? maxNumChanToCheckFor : 0); ++inChanNum)
+        static const auto layoutsToTry = std::invoke ([&]
         {
-            auto inLayout = layout;
+            std::vector<AudioChannelSet> sets;
 
-            if (auto* inBus = processor.getBus (true, 0))
+            for (auto i = 1; i <= Channels::maxNumChanToCheckFor; ++i)
-                if (! isNumberOfChannelsSupported (inBus, inChanNum, inLayout))
-                    continue;
-
-            for (auto outChanNum = hasMainOutputBus ? 1 : 0; outChanNum <= (hasMainOutputBus ? maxNumChanToCheckFor : 0); ++outChanNum)
             {
-                auto outLayout = inLayout;
+                const auto setsWithSizeI = AudioChannelSet::channelSetsWithNumberOfChannels (i);
+                std::copy (setsWithSizeI.begin(), setsWithSizeI.end(), std::back_inserter (sets));
+            }
 
-                if (auto* outBus = processor.getBus (false, 0))
+            return sets;
-                    if (! isNumberOfChannelsSupported (outBus, outChanNum, outLayout))
+        });
-                        continue;
 
-                supportedChannels.add ({ static_cast<SInt16> (hasMainInputBus  ? outLayout.getMainInputChannels()  : 0),
+        std::vector<char> inputHasOutputRestrictions (layoutsToTry.size()), outputHasInputRestrictions (layoutsToTry.size());
-                                         static_cast<SInt16> (hasMainOutputBus ? outLayout.getMainOutputChannels() : 0) });
+
+        for (const auto [inputIndex, inputLayout] : enumerate (layoutsToTry))
+        {
+            for (const auto [outputIndex, outputLayout] : enumerate (layoutsToTry))
+            {
+                auto copy = processor.getBusesLayout();
+
+                if (! copy.inputBuses.isEmpty())
+                    copy.inputBuses.getReference (0) = inputLayout;
+
+                if (! copy.outputBuses.isEmpty())
+                    copy.outputBuses.getReference (0) = outputLayout;
+
+                if (processor.checkBusesLayoutSupported (copy))
+                {
+                    supportedChannels.insert ({ (SInt16) inputLayout.size(), (SInt16) outputLayout.size() });
+                }
+                else
+                {
+                    inputHasOutputRestrictions[(size_t) inputIndex]  = true;
+                    outputHasInputRestrictions[(size_t) outputIndex] = true;
+                }
             }
         }
 
-        const auto hasInOutMismatch = std::any_of (supportedChannels.begin(),
+        static constexpr auto identity = [] (auto x) { return x; };
-                                                   supportedChannels.end(),
+        const auto noRestrictions = std::none_of (inputHasOutputRestrictions.begin(), inputHasOutputRestrictions.end(), identity)
-                                                   [] (const Channels& x) { return x.ins != x.outs; });
+                                 && std::none_of (outputHasInputRestrictions.begin(), outputHasInputRestrictions.end(), identity);
 
-        const auto computeHasUnsupportedLayout = [&] (bool isInput)
+        if (noRestrictions)
         {
-            const auto hasMainBus = isInput ? hasMainInputBus : hasMainOutputBus;
+            if (hasMainInputBus)
-            const auto begin = hasMainBus ? 1 : 0;
+            {
-            const auto end = hasMainBus ? maxNumChanToCheckFor : 0;
+                if (hasMainOutputBus)
+                    return { Channels { -1, -2 } };
 
-            for (auto chan = begin; chan <= end; ++chan)
+                return { Channels { -1, 0 } };
-            {
-                const Channels channelConfig
-                {
-                    static_cast<SInt16> (! isInput && hasInOutMismatch ? defaultInputs  : chan),
-                    static_cast<SInt16> (  isInput && hasInOutMismatch ? defaultOutputs : chan)
-                };
-
-                if (! supportedChannels.contains (channelConfig))
-                    return true;
             }
 
-            return ! hasMainBus;
+            return { Channels { 0, -1 } };
-        };
-
-        const auto hasUnsupportedInput  = computeHasUnsupportedLayout (true);
-        const auto hasUnsupportedOutput = computeHasUnsupportedLayout (false);
-
-        for (const auto& supported : supportedChannels)
-        {
-            AUChannelInfo info;
-
-            // see here: https://developer.apple.com/library/mac/documentation/MusicAudio/Conceptual/AudioUnitProgrammingGuide/TheAudioUnit/TheAudioUnit.html
-            info.inChannels  = static_cast<SInt16> (hasMainInputBus  ? (hasUnsupportedInput  ? supported.ins  : (hasInOutMismatch && (! hasUnsupportedOutput) ? -2 : -1)) : 0);
-            info.outChannels = static_cast<SInt16> (hasMainOutputBus ? (hasUnsupportedOutput ? supported.outs : (hasInOutMismatch && (! hasUnsupportedInput)  ? -2 : -1)) : 0);
-
-            if (info.inChannels == -2 && info.outChannels == -2)
-                info.inChannels = -1;
-
-            int j;
-            for (j = 0; j < channelInfo.size(); ++j)
-                if (info.inChannels == channelInfo.getReference (j).inChannels
-                      && info.outChannels == channelInfo.getReference (j).outChannels)
-                    break;
-
-            if (j >= channelInfo.size())
-                channelInfo.add (info);
         }
 
-        return channelInfo;
+        const auto allMatchedLayoutsExclusivelySupported = std::invoke ([&]
-    }
-
-    static bool isNumberOfChannelsSupported (const AudioProcessor::Bus* b, int numChannels, AudioProcessor::BusesLayout& inOutCurrentLayout)
         {
-        auto potentialSets = AudioChannelSet::channelSetsWithNumberOfChannels (static_cast<int> (numChannels));
+            for (SInt16 i = 1; i <= Channels::maxNumChanToCheckFor; ++i)
-
+                if (supportedChannels.find ({ i, i }) == supportedChannels.end())
-        for (auto set : potentialSets)
-        {
-            auto copy = inOutCurrentLayout;
-
-            if (b->isLayoutSupported (set, &copy))
-            {
-                inOutCurrentLayout = copy;
-                return true;
-            }
-        }
-
                     return false;
+
+            return std::all_of (supportedChannels.begin(), supportedChannels.end(), [] (auto x) { return x.ins == x.outs; });
+        });
+
+        if (allMatchedLayoutsExclusivelySupported)
+            return { Channels { -1, -1 } };
+
+        std::set<Channels> filteredChannels;
+
+        for (auto& c : supportedChannels)
+        {
+            const auto findDistance = [&] (auto channelCount)
+            {
+                return std::distance (layoutsToTry.begin(),
+                                      std::lower_bound (layoutsToTry.begin(),
+                                                        layoutsToTry.end(),
+                                                        channelCount,
+                                                        [] (auto a, auto b) { return a.size() < b; }));
+            };
+
+            const auto findChannelCount = [&] (auto& restrictions,
+                                               auto thisChannelCount,
+                                               auto otherChannelCount,
+                                               auto hasMainBus)
+            {
+                const auto lower = findDistance (otherChannelCount);
+                const auto upper = findDistance (otherChannelCount + 1);
+
+                const auto wildcard = std::all_of (restrictions.begin() + lower,
+                                                   restrictions.begin() + upper,
+                                                   identity)
+                                    ? thisChannelCount
+                                    : (SInt16) -1;
+                return hasMainBus ? wildcard : (SInt16) 0;
+            };
+
+            const auto ins  = findChannelCount (outputHasInputRestrictions, c.ins, c.outs, hasMainInputBus);
+            const auto outs = findChannelCount (inputHasOutputRestrictions, c.outs, c.ins, hasMainOutputBus);
+
+            const Channels layout { ins, outs };
+            filteredChannels.insert (layout == Channels { -1, -1 } ? c : layout);
+        }
+
+        removeNonWildcardLayouts (filteredChannels);
+
+        return filteredChannels;
     }
 
     //==============================================================================

modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat_test.cpp

@@ -0,0 +1,308 @@
+/*
+  ==============================================================================
+
+   This file is part of the JUCE framework.
+   Copyright (c) Raw Material Software Limited
+
+   JUCE is an open source framework subject to commercial or open source
+   licensing.
+
+   By downloading, installing, or using the JUCE framework, or combining the
+   JUCE framework with any other source code, object code, content or any other
+   copyrightable work, you agree to the terms of the JUCE End User Licence
+   Agreement, and all incorporated terms including the JUCE Privacy Policy and
+   the JUCE Website Terms of Service, as applicable, which will bind you. If you
+   do not agree to the terms of these agreements, we will not license the JUCE
+   framework to you, and you must discontinue the installation or download
+   process and cease use of the JUCE framework.
+
+   JUCE End User Licence Agreement: https://juce.com/legal/juce-8-licence/
+   JUCE Privacy Policy: https://juce.com/juce-privacy-policy
+   JUCE Website Terms of Service: https://juce.com/juce-website-terms-of-service/
+
+   Or:
+
+   You may also use this code under the terms of the AGPLv3:
+   https://www.gnu.org/licenses/agpl-3.0.en.html
+
+   THE JUCE FRAMEWORK IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL
+   WARRANTIES, WHETHER EXPRESSED OR IMPLIED, INCLUDING WARRANTY OF
+   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE DISCLAIMED.
+
+  ==============================================================================
+*/
+
+#include "juce_AU_Shared.h"
+
+namespace juce
+{
+
+class AudioUnitPluginFormatTests final : public UnitTest
+{
+public:
+    AudioUnitPluginFormatTests()
+        : UnitTest ("AU Hosting", UnitTestCategories::audioProcessors)
+    {
+    }
+
+    void runTest() override
+    {
+        beginTest ("Permissive audio processor produces layout [-1, -2]");
+        {
+            struct ProcA : public MockAudioProcessor
+            {
+                ProcA()
+                    : MockAudioProcessor (BusesProperties().withInput ("Input", AudioChannelSet::stereo())
+                                                           .withOutput ("Output", AudioChannelSet::stereo())) {}
+
+                bool isBusesLayoutSupported (const BusesLayout&) const override
+                {
+                    return true;
+                }
+            };
+
+            ProcA processor;
+            const auto layouts = AudioUnitHelpers::getAUChannelInfo (processor);
+            expect (layouts == std::set { AudioUnitHelpers::Channels { -1, -2 } });
+        }
+
+        beginTest ("Audio processor with matched I/O produces layout [-1, -1]");
+        {
+            struct ProcB : public MockAudioProcessor
+            {
+                ProcB()
+                    : MockAudioProcessor (BusesProperties().withInput ("Input", AudioChannelSet::stereo())
+                                                           .withOutput ("Output", AudioChannelSet::stereo())) {}
+
+                bool isBusesLayoutSupported (const BusesLayout& l) const override
+                {
+                    return l.getMainInputChannelSet() == l.getMainOutputChannelSet();
+                }
+            };
+
+            ProcB processor;
+            const auto layouts = AudioUnitHelpers::getAUChannelInfo (processor);
+            expect (layouts == std::set { AudioUnitHelpers::Channels { -1, -1 } });
+        }
+
+        beginTest ("Audio processor that supports any input with a two-channel output produces layout [-1, 2]");
+        {
+            struct ProcC : public MockAudioProcessor
+            {
+                ProcC()
+                    : MockAudioProcessor (BusesProperties().withInput ("Input", AudioChannelSet::stereo())
+                                                           .withOutput ("Output", AudioChannelSet::stereo())) {}
+
+                bool isBusesLayoutSupported (const BusesLayout& l) const override
+                {
+                    return l.getMainOutputChannelSet() == AudioChannelSet::stereo();
+                }
+            };
+
+            ProcC processor;
+            const auto layouts = AudioUnitHelpers::getAUChannelInfo (processor);
+            expect (layouts == std::set { AudioUnitHelpers::Channels { -1, 2 } });
+        }
+
+        beginTest ("Audio processor that supports any output with a 6-channel input produces layout [6, -1]");
+        {
+            struct ProcD : public MockAudioProcessor
+            {
+                ProcD()
+                    : MockAudioProcessor (BusesProperties().withInput ("Input", AudioChannelSet::create5point1())
+                                                           .withOutput ("Output", AudioChannelSet::create5point1())) {}
+
+                bool isBusesLayoutSupported (const BusesLayout& l) const override
+                {
+                    return l.getMainInputChannelSet() == AudioChannelSet::create5point1();
+                }
+            };
+
+            ProcD processor;
+            const auto layouts = AudioUnitHelpers::getAUChannelInfo (processor);
+            expect (layouts == std::set { AudioUnitHelpers::Channels { 6, -1 } });
+        }
+
+        beginTest ("Audio processor that supports both above layouts produces [-1, 2] and [6, -1]");
+        {
+            struct ProcE : public MockAudioProcessor
+            {
+                ProcE()
+                    : MockAudioProcessor (BusesProperties().withInput ("Input", AudioChannelSet::create5point1())
+                                                           .withOutput ("Output", AudioChannelSet::stereo())) {}
+
+                bool isBusesLayoutSupported (const BusesLayout& l) const override
+                {
+                    return l.getMainOutputChannelSet() == AudioChannelSet::stereo()
+                        || l.getMainInputChannelSet() == AudioChannelSet::create5point1();
+                }
+            };
+
+            ProcE processor;
+            const auto layouts = AudioUnitHelpers::getAUChannelInfo (processor);
+            expect (layouts == std::set { AudioUnitHelpers::Channels { -1, 2 },
+                                          AudioUnitHelpers::Channels { 6, -1 } });
+        }
+
+        beginTest ("Audio processor that supports only stereo and 5.1 produces [2, 2], [6, 6], [2, 6], and [6, 2]");
+        {
+            struct ProcF : public MockAudioProcessor
+            {
+                ProcF()
+                    : MockAudioProcessor (BusesProperties().withInput ("Input", AudioChannelSet::create5point1())
+                                                           .withOutput ("Output", AudioChannelSet::stereo())) {}
+
+                bool isBusesLayoutSupported (const BusesLayout& l) const override
+                {
+                    const std::array supported { AudioChannelSet::stereo(), AudioChannelSet::create5point1() };
+
+                    return std::find (supported.begin(), supported.end(), l.getMainInputChannelSet()) != supported.end()
+                        && std::find (supported.begin(), supported.end(), l.getMainOutputChannelSet()) != supported.end();
+                }
+            };
+
+            ProcF processor;
+            const auto layouts = AudioUnitHelpers::getAUChannelInfo (processor);
+            expect (layouts == std::set { AudioUnitHelpers::Channels { 2, 2 },
+                                          AudioUnitHelpers::Channels { 2, 6 },
+                                          AudioUnitHelpers::Channels { 6, 2 },
+                                          AudioUnitHelpers::Channels { 6, 6 } });
+        }
+
+        beginTest ("Complex layout is supported");
+        {
+            struct ProcG : public MockAudioProcessor
+            {
+                ProcG()
+                    : MockAudioProcessor (BusesProperties().withInput ("Input", AudioChannelSet::create9point1point6())
+                                                           .withOutput ("Output", AudioChannelSet::create9point1point6())) {}
+
+                bool isBusesLayoutSupported (const BusesLayout& l) const override
+                {
+                    using ACS = juce::AudioChannelSet;
+
+                    const auto input = l.getMainInputChannelSet();
+                    const auto output = l.getMainOutputChannelSet();
+
+                    if (output == ACS::mono())
+                        return input == ACS::mono();
+
+                    if (output == ACS::stereo())
+                        return input == ACS::mono() || input == ACS::stereo();
+
+                    if (output == ACS::create9point1point6())
+                    {
+                        return input == ACS::mono()
+                            || input == ACS::stereo()
+                            || input == ACS::createLCR()
+                            || input == ACS::quadraphonic()
+                            || input == ACS::create5point0()
+                            || input == ACS::create5point1()
+                            || input == ACS::create7point0()
+                            || input == ACS::create7point1()
+                            || input == ACS::create7point0point2()
+                            || input == ACS::create5point1point4()
+                            || input == ACS::create7point0point4()
+                            || input == ACS::create7point1point4()
+                            || input == ACS::create7point0point6()
+                            || input == ACS::create7point1point6()
+                            || input == ACS::create9point0point6()
+                            || input == ACS::create9point1point6();
+                    }
+
+                    return false;
+                }
+            };
+
+            ProcG processor;
+            const auto layouts = AudioUnitHelpers::getAUChannelInfo (processor);
+            expect (layouts == std::set { AudioUnitHelpers::Channels { 1, 1 },
+                                          AudioUnitHelpers::Channels { 1, 2 },
+                                          AudioUnitHelpers::Channels { 2, 2 },
+                                          AudioUnitHelpers::Channels { 1, 16 },
+                                          AudioUnitHelpers::Channels { 2, 16 },
+                                          AudioUnitHelpers::Channels { 3, 16 },
+                                          AudioUnitHelpers::Channels { 4, 16 },
+                                          AudioUnitHelpers::Channels { 5, 16 },
+                                          AudioUnitHelpers::Channels { 6, 16 },
+                                          AudioUnitHelpers::Channels { 7, 16 },
+                                          AudioUnitHelpers::Channels { 8, 16 },
+                                          AudioUnitHelpers::Channels { 9, 16 },
+                                          AudioUnitHelpers::Channels { 10, 16 },
+                                          AudioUnitHelpers::Channels { 11, 16 },
+                                          AudioUnitHelpers::Channels { 12, 16 },
+                                          AudioUnitHelpers::Channels { 13, 16 },
+                                          AudioUnitHelpers::Channels { 14, 16 },
+                                          AudioUnitHelpers::Channels { 15, 16 },
+                                          AudioUnitHelpers::Channels { 16, 16 } });
+        }
+
+        beginTest ("Audio processor that supports only stereo out reports [0, 2]");
+        {
+            struct ProcH : public MockAudioProcessor
+            {
+                ProcH()
+                    : MockAudioProcessor (BusesProperties().withOutput ("Output", AudioChannelSet::stereo())) {}
+
+                bool isBusesLayoutSupported (const BusesLayout& l) const override
+                {
+                    return l.inputBuses.isEmpty() && l.getMainOutputChannelSet() == AudioChannelSet::stereo();
+                }
+            };
+
+            ProcH processor;
+            const auto layouts = AudioUnitHelpers::getAUChannelInfo (processor);
+            expect (layouts == std::set { AudioUnitHelpers::Channels { 0, 2 } });
+        }
+
+        beginTest ("Audio processor that supports any out but no in reports [0, -1]");
+        {
+            struct ProcI : public MockAudioProcessor
+            {
+                ProcI()
+                    : MockAudioProcessor (BusesProperties().withOutput ("Output", AudioChannelSet::stereo())) {}
+
+                bool isBusesLayoutSupported (const BusesLayout& l) const override
+                {
+                    return l.inputBuses.isEmpty();
+                }
+            };
+
+            ProcI processor;
+            const auto layouts = AudioUnitHelpers::getAUChannelInfo (processor);
+            expect (layouts == std::set { AudioUnitHelpers::Channels { 0, -1 } });
+        }
+    }
+
+private:
+    struct MockAudioProcessor : public AudioProcessor
+    {
+        using AudioProcessor::AudioProcessor;
+
+        const String getName() const override                         { return "Basic Processor"; }
+        double getTailLengthSeconds() const override                  { return {}; }
+        bool acceptsMidi() const override                             { return {}; }
+        bool producesMidi() const override                            { return {}; }
+        AudioProcessorEditor* createEditor() override                 { return {}; }
+        bool hasEditor() const override                               { return {}; }
+        int getNumPrograms() override                                 { return 1; }
+        int getCurrentProgram() override                              { return {}; }
+        void setCurrentProgram (int) override                         {}
+        const String getProgramName (int) override                    { return {}; }
+        void changeProgramName (int, const String&) override          {}
+        void getStateInformation (MemoryBlock&) override              {}
+        void setStateInformation (const void*, int) override          {}
+        void prepareToPlay (double, int) override                     {}
+        void releaseResources() override                              {}
+        bool supportsDoublePrecisionProcessing() const override       { return {}; }
+        bool isMidiEffect() const override                            { return {}; }
+        void reset() override                                         {}
+        void setNonRealtime (bool) noexcept override                  {}
+        void processBlock (AudioBuffer<float>&, MidiBuffer&) override {}
+        using AudioProcessor::processBlock;
+    };
+};
+
+static AudioUnitPluginFormatTests auPluginFormatTests;
+
+} // namespace juce

modules/juce_audio_processors/juce_audio_processors.cpp

@@ -221,6 +221,10 @@ private:
   #include "format_types/juce_VST3PluginFormat_test.cpp"
  #endif
 
+ #if JUCE_PLUGINHOST_AU && (JUCE_MAC || JUCE_IOS)
+  #include "format_types/juce_AudioUnitPluginFormat_test.cpp"
+ #endif
+
  #if JUCE_PLUGINHOST_LV2 && (! (JUCE_ANDROID || JUCE_IOS))
   #include "format_types/juce_LV2PluginFormat_test.cpp"
  #endif