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The JUCE cross-platform C++ framework, with DISTRHO/KXStudio specific changes
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JUCE/modules/juce_audio_plugin_client/AU/juce_AUv3_Wrapper.mm

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  1. /*

  2.   ==============================================================================

  3. 

  4.    This file is part of the JUCE library.

  5.    Copyright (c) 2017 - ROLI Ltd.

  6. 

  7.    JUCE is an open source library subject to commercial or open-source

  8.    licensing.

  9. 

  10.    By using JUCE, you agree to the terms of both the JUCE 5 End-User License

  11.    Agreement and JUCE 5 Privacy Policy (both updated and effective as of the

  12.    27th April 2017).

  13. 

  14.    End User License Agreement: www.juce.com/juce-5-licence

  15.    Privacy Policy: www.juce.com/juce-5-privacy-policy

  16. 

  17.    Or: You may also use this code under the terms of the GPL v3 (see

  18.    www.gnu.org/licenses).

  19. 

  20.    JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER

  21.    EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE

  22.    DISCLAIMED.

  23. 

  24.   ==============================================================================

  25. */

  26. 

  27. #include "../../juce_core/system/juce_TargetPlatform.h"

  28. #include "../utility/juce_CheckSettingMacros.h"

  29. 

  30. #if JucePlugin_Build_AUv3

  31. 

  32. #if JUCE_MAC

  33.  #if (! defined MAC_OS_X_VERSION_MIN_REQUIRED) || (! defined MAC_OS_X_VERSION_10_11) || (MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_11)

  34.   #error AUv3 needs Deployment Target OS X 10.11 or higher to compile

  35.  #endif

  36.  #if (defined MAC_OS_X_VERSION_10_13) && (MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_13)

  37.   #define JUCE_AUV3_MIDI_OUTPUT_SUPPORTED 1

  38.   #define JUCE_AUV3_VIEW_CONFIG_SUPPORTED 1

  39.  #endif

  40. #endif

  41. 

  42. #if JUCE_IOS

  43.  #if (! defined __IPHONE_OS_VERSION_MIN_REQUIRED) || (! defined __IPHONE_9_0) || (__IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_9_0)

  44.   #error AUv3 needs Deployment Target iOS 9.0 or higher to compile

  45.  #endif

  46.  #if (defined __IPHONE_11_0) && (__IPHONE_OS_VERSION_MIN_REQUIRED >= __IPHONE_11_0)

  47.   #define JUCE_AUV3_MIDI_OUTPUT_SUPPORTED 1

  48.   #define JUCE_AUV3_VIEW_CONFIG_SUPPORTED 1

  49.  #endif

  50. #endif

  51. 

  52. #ifndef __OBJC2__

  53.  #error AUv3 needs Objective-C 2 support (compile with 64-bit)

  54. #endif

  55. 

  56. #define JUCE_CORE_INCLUDE_OBJC_HELPERS 1

  57. 

  58. #include "../utility/juce_IncludeSystemHeaders.h"

  59. #include "../utility/juce_IncludeModuleHeaders.h"

  60. 

  61. #import <CoreAudioKit/CoreAudioKit.h>

  62. #import <AudioToolbox/AudioToolbox.h>

  63. #import <AVFoundation/AVFoundation.h>

  64. 

  65. #include "../../juce_graphics/native/juce_mac_CoreGraphicsHelpers.h"

  66. #include "../../juce_audio_basics/native/juce_mac_CoreAudioLayouts.h"

  67. #include "../../juce_audio_processors/format_types/juce_LegacyAudioParameter.cpp"

  68. #include "../../juce_audio_processors/format_types/juce_AU_Shared.h"

  69. 

  70. #define JUCE_VIEWCONTROLLER_OBJC_NAME(x) JUCE_JOIN_MACRO (x, FactoryAUv3)

  71. 

  72. #if JUCE_IOS

  73.  #define JUCE_IOS_MAC_VIEW  UIView

  74. #else

  75.  #define JUCE_IOS_MAC_VIEW  NSView

  76. #endif

  77. 

  78. #define JUCE_AUDIOUNIT_OBJC_NAME(x) JUCE_JOIN_MACRO (x, AUv3)

  79. 

  80. #pragma clang diagnostic push

  81. #pragma clang diagnostic ignored "-Wnullability-completeness"

  82. 

  83. using namespace juce;

  84. 

  85. struct AudioProcessorHolder  : public ReferenceCountedObject

  86. {

  87.     AudioProcessorHolder() {}

  88.     AudioProcessorHolder (AudioProcessor* p) : processor (p) {}

  89.     AudioProcessor& operator*() noexcept        { return *processor; }

  90.     AudioProcessor* operator->() noexcept       { return processor.get(); }

  91.     AudioProcessor* get() noexcept              { return processor.get(); }

  92. 

  93.     struct ViewConfig

  94.     {

  95.         double width;

  96.         double height;

  97.         bool hostHasMIDIController;

  98.     };

  99. 

  100.     std::unique_ptr<ViewConfig> viewConfiguration;

  101. 

  102.     using Ptr = ReferenceCountedObjectPtr<AudioProcessorHolder>;

  103. 

  104. private:

  105.     std::unique_ptr<AudioProcessor> processor;

  106. 

  107.     AudioProcessorHolder& operator= (AudioProcessor*) = delete;

  108.     AudioProcessorHolder (AudioProcessorHolder&) = delete;

  109.     AudioProcessorHolder& operator= (AudioProcessorHolder&) = delete;

  110. };

  111. 

  112. //==============================================================================

  113. class JuceAudioUnitv3Base

  114. {

  115. public:

  116.     JuceAudioUnitv3Base (const AudioComponentDescription& descr,

  117.                          AudioComponentInstantiationOptions options,

  118.                          NSError** error)

  119.        #pragma clang diagnostic push

  120.        #pragma clang diagnostic ignored "-Wobjc-method-access"

  121.         : au ([audioUnitObjCClass.createInstance() initWithComponentDescription: descr

  122.                                                                         options: options

  123.                                                                           error: error

  124.                                                                       juceClass: this])

  125.        #pragma clang diagnostic pop

  126.     {}

  127. 

  128.     JuceAudioUnitv3Base (AUAudioUnit* audioUnit) : au (audioUnit)

  129.     {

  130.         jassert (MessageManager::getInstance()->isThisTheMessageThread());

  131.         initialiseJuce_GUI();

  132.     }

  133. 

  134.     virtual ~JuceAudioUnitv3Base() = default;

  135. 

  136.     //==============================================================================

  137.     AUAudioUnit* getAudioUnit() noexcept                                   { return au; }

  138. 

  139.     //==============================================================================

  140.     virtual void reset()                                                   = 0;

  141. 

  142.     //==============================================================================

  143.     virtual AUAudioUnitPreset* getCurrentPreset()                          = 0;

  144.     virtual void setCurrentPreset(AUAudioUnitPreset*)                      = 0;

  145.     virtual NSArray<AUAudioUnitPreset*>* getFactoryPresets()               = 0;

  146. 

  147.     virtual NSDictionary<NSString*, id>* getFullState()

  148.     {

  149.         objc_super s = { getAudioUnit(), [AUAudioUnit class] };

  150.         return ObjCMsgSendSuper<NSDictionary<NSString*, id>*> (&s, @selector (fullState));

  151.     }

  152. 

  153.     virtual void setFullState (NSDictionary<NSString*, id>* state)

  154.     {

  155.         objc_super s = { getAudioUnit(), [AUAudioUnit class] };

  156.         ObjCMsgSendSuper<void, NSDictionary<NSString*, id>*> (&s, @selector (setFullState:), state);

  157.     }

  158. 

  159.     virtual AUParameterTree* getParameterTree()                            = 0;

  160.     virtual NSArray<NSNumber*>* parametersForOverviewWithCount (int)       = 0;

  161. 

  162.     //==============================================================================

  163.     virtual NSTimeInterval getLatency()                                    = 0;

  164.     virtual NSTimeInterval getTailTime()                                   = 0;

  165. 

  166.     //==============================================================================

  167.     virtual AUAudioUnitBusArray* getInputBusses()                          = 0;

  168.     virtual AUAudioUnitBusArray* getOutputBusses()                         = 0;

  169.     virtual NSArray<NSNumber*>* getChannelCapabilities()                   = 0;

  170.     virtual bool shouldChangeToFormat (AVAudioFormat*, AUAudioUnitBus*)    = 0;

  171. 

  172.     //==============================================================================

  173.     virtual int getVirtualMIDICableCount()                                 = 0;

  174.     virtual bool getSupportsMPE()                                          = 0;

  175.     virtual NSArray<NSString*>* getMIDIOutputNames()                       = 0;

  176. 

  177.     //==============================================================================

  178.     virtual AUInternalRenderBlock getInternalRenderBlock()                 = 0;

  179.     virtual bool getCanProcessInPlace()                                    { return false; }

  180.     virtual bool getRenderingOffline()                                     = 0;

  181.     virtual void setRenderingOffline (bool offline)                        = 0;

  182. 

  183.     virtual bool getShouldBypassEffect()

  184.     {

  185.         objc_super s = { getAudioUnit(), [AUAudioUnit class] };

  186.         return (ObjCMsgSendSuper<BOOL> (&s, @selector (shouldBypassEffect)) == YES);

  187.     }

  188. 

  189.     virtual void setShouldBypassEffect (bool shouldBypass)

  190.     {

  191.         objc_super s = { getAudioUnit(), [AUAudioUnit class] };

  192.         ObjCMsgSendSuper<void, BOOL> (&s, @selector (setShouldBypassEffect:), shouldBypass ? YES : NO);

  193.     }

  194. 

  195.     //==============================================================================

  196.     virtual NSString* getContextName()      const                          = 0;

  197.     virtual void setContextName (NSString*)                                = 0;

  198. 

  199.     virtual bool allocateRenderResourcesAndReturnError (NSError **outError)

  200.     {

  201.         objc_super s = { getAudioUnit(), [AUAudioUnit class] };

  202.         return (ObjCMsgSendSuper<BOOL, NSError**> (&s, @selector (allocateRenderResourcesAndReturnError:), outError) == YES);

  203.     }

  204. 

  205.     virtual void deallocateRenderResources()

  206.     {

  207.         objc_super s = { getAudioUnit(), [AUAudioUnit class] };

  208.         ObjCMsgSendSuper<void> (&s, @selector (deallocateRenderResources));

  209.     }

  210. 

  211.     //==============================================================================

  212.    #if JUCE_AUV3_VIEW_CONFIG_SUPPORTED

  213.     virtual NSIndexSet* getSupportedViewConfigurations (NSArray<AUAudioUnitViewConfiguration*>*) = 0;

  214.     virtual void selectViewConfiguration (AUAudioUnitViewConfiguration*)   = 0;

  215.    #endif

  216. 

  217. private:

  218.     struct Class  : public ObjCClass<AUAudioUnit>

  219.     {

  220.         Class() : ObjCClass<AUAudioUnit> ("AUAudioUnit_")

  221.         {

  222.             addIvar<JuceAudioUnitv3Base*> ("cppObject");

  223. 

  224.            #pragma clang diagnostic push

  225.            #pragma clang diagnostic ignored "-Wundeclared-selector"

  226.             addMethod (@selector (initWithComponentDescription:options:error:juceClass:),

  227.                        initWithComponentDescriptionAndJuceClass, "@@:",

  228.                        @encode (AudioComponentDescription),

  229.                        @encode (AudioComponentInstantiationOptions), "^@@");

  230.            #pragma clang diagnostic pop

  231. 

  232.             addMethod (@selector (initWithComponentDescription:options:error:),

  233.                        initWithComponentDescription, "@@:",

  234.                        @encode (AudioComponentDescription),

  235.                        @encode (AudioComponentInstantiationOptions), "^@");

  236. 

  237.             addMethod (@selector (dealloc),                         dealloc,                        "v@:");

  238. 

  239.             //==============================================================================

  240.             addMethod (@selector (reset),                           reset,                          "v@:");

  241. 

  242.             //==============================================================================

  243.             addMethod (@selector (currentPreset),                   getCurrentPreset,               "@@:");

  244.             addMethod (@selector (setCurrentPreset:),               setCurrentPreset,               "v@:@");

  245.             addMethod (@selector (factoryPresets),                  getFactoryPresets,              "@@:");

  246.             addMethod (@selector (fullState),                       getFullState,                   "@@:");

  247.             addMethod (@selector (setFullState:),                   setFullState,                   "v@:@");

  248.             addMethod (@selector (parameterTree),                   getParameterTree,               "@@:");

  249.             addMethod (@selector (parametersForOverviewWithCount:), parametersForOverviewWithCount, "@@:", @encode (NSInteger));

  250. 

  251.             //==============================================================================

  252.             addMethod (@selector (latency),                         getLatency,                     @encode (NSTimeInterval), "@:");

  253.             addMethod (@selector (tailTime),                        getTailTime,                    @encode (NSTimeInterval),  "@:");

  254. 

  255.             //==============================================================================

  256.             addMethod (@selector (inputBusses),                     getInputBusses,                 "@@:");

  257.             addMethod (@selector (outputBusses),                    getOutputBusses,                "@@:");

  258.             addMethod (@selector (channelCapabilities),             getChannelCapabilities,         "@@:");

  259.             addMethod (@selector (shouldChangeToFormat:forBus:),    shouldChangeToFormat,           "B@:@@");

  260. 

  261.             //==============================================================================

  262.             addMethod (@selector (virtualMIDICableCount),           getVirtualMIDICableCount,       @encode (NSInteger), "@:");

  263.             addMethod (@selector (supportsMPE),                     getSupportsMPE,                 @encode (BOOL),      "@:");

  264. 

  265.            #if JUCE_AUV3_MIDI_OUTPUT_SUPPORTED

  266.             addMethod (@selector (MIDIOutputNames),                 getMIDIOutputNames,             "@@:");

  267.            #endif

  268. 

  269.             //==============================================================================

  270.             addMethod (@selector (internalRenderBlock),             getInternalRenderBlock,         @encode (AUInternalRenderBlock), "@:");

  271.             addMethod (@selector (canProcessInPlace),               getCanProcessInPlace,           @encode (BOOL), "@:");

  272.             addMethod (@selector (isRenderingOffline),              getRenderingOffline,            @encode (BOOL),  "@:");

  273.             addMethod (@selector (setRenderingOffline:),            setRenderingOffline,            "v@:", @encode (BOOL));

  274.             addMethod (@selector (shouldBypassEffect),              getShouldBypassEffect,          @encode (BOOL),  "@:");

  275.             addMethod (@selector (setShouldBypassEffect:),          setShouldBypassEffect,          "v@:", @encode (BOOL));

  276.             addMethod (@selector (allocateRenderResourcesAndReturnError:),  allocateRenderResourcesAndReturnError, "B@:^@");

  277.             addMethod (@selector (deallocateRenderResources),       deallocateRenderResources,      "v@:");

  278. 

  279.             //==============================================================================

  280.             addMethod (@selector (contextName),                     getContextName,                 "@@:");

  281.             addMethod (@selector (setContextName:),                  setContextName,                 "v@:@");

  282. 

  283.             //==============================================================================

  284.            #if JUCE_AUV3_VIEW_CONFIG_SUPPORTED

  285.             addMethod (@selector (supportedViewConfigurations:),    getSupportedViewConfigurations, "@@:@");

  286.             addMethod (@selector (selectViewConfiguration:),        selectViewConfiguration,        "v@:@");

  287.            #endif

  288. 

  289.             registerClass();

  290.         }

  291. 

  292.         //==============================================================================

  293.         static JuceAudioUnitv3Base* _this (id self)                     { return getIvar<JuceAudioUnitv3Base*> (self, "cppObject"); }

  294.         static void setThis (id self, JuceAudioUnitv3Base* cpp)         { object_setInstanceVariable           (self, "cppObject", cpp); }

  295. 

  296.         //==============================================================================

  297.         static id initWithComponentDescription (id _self, SEL, AudioComponentDescription descr, AudioComponentInstantiationOptions options, NSError** error)

  298.         {

  299.             AUAudioUnit* self = _self;

  300. 

  301.             objc_super s = { self, [AUAudioUnit class] };

  302.             self = ObjCMsgSendSuper<AUAudioUnit*, AudioComponentDescription,

  303.                                     AudioComponentInstantiationOptions, NSError**> (&s, @selector(initWithComponentDescription:options:error:), descr, options, error);

  304. 

  305.             JuceAudioUnitv3Base* juceAU = JuceAudioUnitv3Base::create (self, descr, options, error);

  306. 

  307.             setThis (self, juceAU);

  308.             return self;

  309.         }

  310. 

  311.         static id initWithComponentDescriptionAndJuceClass (id _self, SEL, AudioComponentDescription descr, AudioComponentInstantiationOptions options, NSError** error, JuceAudioUnitv3Base* juceAU)

  312.         {

  313.             AUAudioUnit* self = _self;

  314. 

  315.             objc_super s = { self, [AUAudioUnit class] };

  316.             self = ObjCMsgSendSuper<AUAudioUnit*, AudioComponentDescription,

  317.                                     AudioComponentInstantiationOptions, NSError**> (&s, @selector(initWithComponentDescription:options:error:), descr, options, error);

  318. 

  319. 

  320.             setThis (self, juceAU);

  321.             return self;

  322.         }

  323. 

  324.         static void dealloc (id self, SEL)

  325.         {

  326.             if (! MessageManager::getInstance()->isThisTheMessageThread())

  327.             {

  328.                 WaitableEvent deletionEvent;

  329. 

  330.                 struct AUDeleter  : public CallbackMessage

  331.                 {

  332.                     AUDeleter (id selfToDelete, WaitableEvent& event)

  333.                         : parentSelf (selfToDelete), parentDeletionEvent (event)

  334.                     {

  335.                     }

  336. 

  337.                     void messageCallback() override

  338.                     {

  339.                         delete _this (parentSelf);

  340.                         parentDeletionEvent.signal();

  341.                     }

  342. 

  343.                     id parentSelf;

  344.                     WaitableEvent& parentDeletionEvent;

  345.                 };

  346. 

  347.                 (new AUDeleter (self, deletionEvent))->post();

  348.                 deletionEvent.wait (-1);

  349.             }

  350.             else

  351.             {

  352.                 delete _this (self);

  353.             }

  354.         }

  355. 

  356.         //==============================================================================

  357.         static void reset (id self, SEL)                                                            { _this (self)->reset(); }

  358. 

  359.         //==============================================================================

  360.         static AUAudioUnitPreset* getCurrentPreset (id self, SEL)                                   { return _this (self)->getCurrentPreset(); }

  361.         static void setCurrentPreset (id self, SEL, AUAudioUnitPreset* preset)                      { return _this (self)->setCurrentPreset (preset); }

  362.         static NSArray<AUAudioUnitPreset*>* getFactoryPresets (id self, SEL)                        { return _this (self)->getFactoryPresets(); }

  363.         static NSDictionary<NSString*, id>* getFullState (id self, SEL)                             { return _this (self)->getFullState(); }

  364.         static void setFullState (id self, SEL, NSDictionary<NSString *, id>* state)                { return _this (self)->setFullState (state); }

  365.         static AUParameterTree*     getParameterTree (id self, SEL)                                 { return _this (self)->getParameterTree(); }

  366.         static NSArray<NSNumber*>* parametersForOverviewWithCount (id self, SEL, NSInteger count)   { return _this (self)->parametersForOverviewWithCount (static_cast<int> (count)); }

  367. 

  368.         //==============================================================================

  369.         static NSTimeInterval getLatency (id self, SEL)                                             { return _this (self)->getLatency(); }

  370.         static NSTimeInterval getTailTime (id self, SEL)                                            { return _this (self)->getTailTime(); }

  371. 

  372.         //==============================================================================

  373.         static AUAudioUnitBusArray* getInputBusses   (id self, SEL)                                 { return _this (self)->getInputBusses(); }

  374.         static AUAudioUnitBusArray* getOutputBusses  (id self, SEL)                                 { return _this (self)->getOutputBusses(); }

  375.         static NSArray<NSNumber*>* getChannelCapabilities (id self, SEL)                            { return _this (self)->getChannelCapabilities(); }

  376.         static BOOL shouldChangeToFormat (id self, SEL, AVAudioFormat* format, AUAudioUnitBus* bus) { return _this (self)->shouldChangeToFormat (format, bus) ? YES : NO; }

  377. 

  378.         //==============================================================================

  379.         static NSInteger getVirtualMIDICableCount (id self, SEL)                                    { return _this (self)->getVirtualMIDICableCount(); }

  380.         static BOOL getSupportsMPE (id self, SEL)                                                   { return _this (self)->getSupportsMPE() ? YES : NO; }

  381.         static NSArray<NSString*>* getMIDIOutputNames (id self, SEL)                                { return _this (self)->getMIDIOutputNames(); }

  382. 

  383.         //==============================================================================

  384.         static AUInternalRenderBlock getInternalRenderBlock (id self, SEL)                          { return _this (self)->getInternalRenderBlock();  }

  385.         static BOOL getCanProcessInPlace (id self, SEL)                                             { return _this (self)->getCanProcessInPlace() ? YES : NO; }

  386.         static BOOL getRenderingOffline (id self, SEL)                                              { return _this (self)->getRenderingOffline() ? YES : NO; }

  387.         static void setRenderingOffline (id self, SEL, BOOL renderingOffline)                       { _this (self)->setRenderingOffline (renderingOffline); }

  388.         static BOOL allocateRenderResourcesAndReturnError (id self, SEL, NSError** error)           { return _this (self)->allocateRenderResourcesAndReturnError (error) ? YES : NO; }

  389.         static void deallocateRenderResources (id self, SEL)                                        { _this (self)->deallocateRenderResources(); }

  390.         static BOOL getShouldBypassEffect (id self, SEL)                                            { return _this (self)->getShouldBypassEffect() ? YES : NO; }

  391.         static void setShouldBypassEffect (id self, SEL, BOOL shouldBypass)                         { _this (self)->setShouldBypassEffect (shouldBypass); }

  392. 

  393.         //==============================================================================

  394.         static NSString* getContextName (id self, SEL)                                              { return _this (self)->getContextName(); }

  395.         static void setContextName (id self, SEL, NSString* str)                                    { return _this (self)->setContextName (str); }

  396. 

  397.         //==============================================================================

  398.        #if JUCE_AUV3_VIEW_CONFIG_SUPPORTED

  399.         static NSIndexSet* getSupportedViewConfigurations (id self, SEL, NSArray<AUAudioUnitViewConfiguration*>* configs) { return _this (self)->getSupportedViewConfigurations (configs); }

  400.         static void selectViewConfiguration (id self, SEL, AUAudioUnitViewConfiguration* config)    { _this (self)->selectViewConfiguration (config); }

  401.        #endif

  402.     };

  403. 

  404.     static JuceAudioUnitv3Base* create (AUAudioUnit*, AudioComponentDescription, AudioComponentInstantiationOptions, NSError**);

  405. 

  406.     //==============================================================================

  407.     static Class audioUnitObjCClass;

  408. 

  409. protected:

  410.     AUAudioUnit* au;

  411. };

  412. 

  413. //==============================================================================

  414. JuceAudioUnitv3Base::Class JuceAudioUnitv3Base::audioUnitObjCClass;

  415. 

  416. //==============================================================================

  417. //=========================== The actual AudioUnit =============================

  418. //==============================================================================

  419. class JuceAudioUnitv3  : public JuceAudioUnitv3Base,

  420.                          public AudioProcessorListener,

  421.                          public AudioPlayHead,

  422.                          private AudioProcessorParameter::Listener

  423. {

  424. public:

  425.     JuceAudioUnitv3 (const AudioProcessorHolder::Ptr& processor,

  426.                      const AudioComponentDescription& descr,

  427.                      AudioComponentInstantiationOptions options,

  428.                      NSError** error)

  429.         : JuceAudioUnitv3Base (descr, options, error),

  430.           processorHolder (processor),

  431.           mapper (*processorHolder->get())

  432.     {

  433.         init();

  434.     }

  435. 

  436.     JuceAudioUnitv3 (AUAudioUnit* audioUnit, AudioComponentDescription, AudioComponentInstantiationOptions, NSError**)

  437.         : JuceAudioUnitv3Base (audioUnit),

  438.           processorHolder (new AudioProcessorHolder (createPluginFilterOfType (AudioProcessor::wrapperType_AudioUnitv3))),

  439.           mapper (*processorHolder->get())

  440.     {

  441.         init();

  442.     }

  443. 

  444.     ~JuceAudioUnitv3() override

  445.     {

  446.         auto& processor = getAudioProcessor();

  447.         processor.removeListener (this);

  448. 

  449.         if (bypassParam != nullptr)

  450.             bypassParam->removeListener (this);

  451. 

  452.         removeEditor (processor);

  453. 

  454.         if (editorObserverToken != nullptr)

  455.         {

  456.             [paramTree.get() removeParameterObserver: editorObserverToken];

  457.             editorObserverToken = nullptr;

  458.         }

  459.     }

  460. 

  461.     //==============================================================================

  462.     void init()

  463.     {

  464.         inParameterChangedCallback = false;

  465. 

  466.         AudioProcessor& processor = getAudioProcessor();

  467.         const AUAudioFrameCount maxFrames = [getAudioUnit() maximumFramesToRender];

  468. 

  469.        #ifdef JucePlugin_PreferredChannelConfigurations

  470.         short configs[][2] = {JucePlugin_PreferredChannelConfigurations};

  471.         const int numConfigs = sizeof (configs) / sizeof (short[2]);

  472. 

  473.         jassert (numConfigs > 0 && (configs[0][0] > 0 || configs[0][1] > 0));

  474.         processor.setPlayConfigDetails (configs[0][0], configs[0][1], kDefaultSampleRate, static_cast<int> (maxFrames));

  475. 

  476.         Array<AUChannelInfo> channelInfos;

  477. 

  478.         for (int i = 0; i < numConfigs; ++i)

  479.         {

  480.             AUChannelInfo channelInfo;

  481. 

  482.             channelInfo.inChannels  = configs[i][0];

  483.             channelInfo.outChannels = configs[i][1];

  484. 

  485.             channelInfos.add (channelInfo);

  486.         }

  487.        #else

  488.         Array<AUChannelInfo> channelInfos = AudioUnitHelpers::getAUChannelInfo (processor);

  489.        #endif

  490. 

  491.         processor.setPlayHead (this);

  492. 

  493.         totalInChannels  = processor.getTotalNumInputChannels();

  494.         totalOutChannels = processor.getTotalNumOutputChannels();

  495. 

  496.         {

  497.             channelCapabilities.reset ([[NSMutableArray<NSNumber*> alloc] init]);

  498. 

  499.             for (int i = 0; i < channelInfos.size(); ++i)

  500.             {

  501.                 AUChannelInfo& info = channelInfos.getReference (i);

  502. 

  503.                 [channelCapabilities.get() addObject: [NSNumber numberWithInteger: info.inChannels]];

  504.                 [channelCapabilities.get() addObject: [NSNumber numberWithInteger: info.outChannels]];

  505.             }

  506.         }

  507. 

  508.         editorObserverToken = nullptr;

  509.         internalRenderBlock = CreateObjCBlock (this, &JuceAudioUnitv3::renderCallback);

  510. 

  511.         processor.setRateAndBufferSizeDetails (kDefaultSampleRate, static_cast<int> (maxFrames));

  512.         processor.prepareToPlay (kDefaultSampleRate, static_cast<int> (maxFrames));

  513.         processor.addListener (this);

  514. 

  515.         addParameters();

  516.         addPresets();

  517. 

  518.         addAudioUnitBusses (true);

  519.         addAudioUnitBusses (false);

  520.     }

  521. 

  522.     AudioProcessor& getAudioProcessor() const noexcept        { return **processorHolder; }

  523. 

  524.     //==============================================================================

  525.     void reset() override

  526.     {

  527.         midiMessages.clear();

  528.         lastTimeStamp.mSampleTime = std::numeric_limits<Float64>::max();

  529.     }

  530. 

  531.     //==============================================================================

  532.     AUAudioUnitPreset* getCurrentPreset() override

  533.     {

  534.         const int n = static_cast<int> ([factoryPresets.get() count]);

  535.         const int idx = static_cast<int> (getAudioProcessor().getCurrentProgram());

  536. 

  537.         if (idx < n)

  538.             return [factoryPresets.get() objectAtIndex:static_cast<unsigned int> (idx)];

  539. 

  540.         return nullptr;

  541.     }

  542. 

  543.     void setCurrentPreset(AUAudioUnitPreset* preset) override

  544.     {

  545.         const int n = static_cast<int> ([factoryPresets.get() count]);

  546.         const int idx = static_cast<int> ([preset number]);

  547. 

  548.         if (isPositiveAndBelow (idx, n))

  549.             getAudioProcessor().setCurrentProgram (idx);

  550.     }

  551. 

  552.     NSArray<AUAudioUnitPreset*>* getFactoryPresets() override

  553.     {

  554.         return factoryPresets.get();

  555.     }

  556. 

  557.     NSDictionary<NSString*, id>* getFullState() override

  558.     {

  559.         NSMutableDictionary<NSString*, id>* retval = [[NSMutableDictionary<NSString*, id> alloc] init];

  560. 

  561.         {

  562.             NSDictionary<NSString*, id>* superRetval = JuceAudioUnitv3Base::getFullState();

  563. 

  564.             if (superRetval != nullptr)

  565.                 [retval addEntriesFromDictionary:superRetval];

  566.         }

  567. 

  568.         juce::MemoryBlock state;

  569. 

  570.        #if JUCE_AU_WRAPPERS_SAVE_PROGRAM_STATES

  571.         getAudioProcessor().getCurrentProgramStateInformation (state);

  572.        #else

  573.         getAudioProcessor().getStateInformation (state);

  574.        #endif

  575. 

  576.         if (state.getSize() > 0)

  577.         {

  578.             NSData* ourState = [[NSData alloc] initWithBytes: state.getData()

  579.                                                       length: state.getSize()];

  580. 

  581.             NSString* nsKey = [[NSString alloc] initWithUTF8String: JUCE_STATE_DICTIONARY_KEY];

  582. 

  583.             [retval setObject: ourState

  584.                        forKey: nsKey];

  585. 

  586.             [nsKey    release];

  587.             [ourState release];

  588.         }

  589. 

  590.         return [retval autorelease];

  591.     }

  592. 

  593.     void setFullState (NSDictionary<NSString*, id>* state) override

  594.     {

  595.         if (state == nullptr)

  596.             return;

  597. 

  598.         NSMutableDictionary<NSString*, id>* modifiedState = [[NSMutableDictionary<NSString*, id> alloc] init];

  599.         [modifiedState addEntriesFromDictionary: state];

  600. 

  601.         NSString* nsPresetKey = [[NSString alloc] initWithUTF8String: kAUPresetDataKey];

  602.         [modifiedState removeObjectForKey: nsPresetKey];

  603.         [nsPresetKey release];

  604. 

  605.         JuceAudioUnitv3Base::setFullState (modifiedState);

  606. 

  607.         NSString* nsKey = [[NSString alloc] initWithUTF8String: JUCE_STATE_DICTIONARY_KEY];

  608.         NSObject* obj = [modifiedState objectForKey: nsKey];

  609.         [nsKey release];

  610. 

  611.         if (obj != nullptr)

  612.         {

  613.             if ([obj isKindOfClass:[NSData class]])

  614.             {

  615.                 NSData* data = reinterpret_cast<NSData*> (obj);

  616.                 const int numBytes = static_cast<int> ([data length]);

  617.                 const juce::uint8* const rawBytes = reinterpret_cast< const juce::uint8* const> ([data bytes]);

  618. 

  619.                 if (numBytes > 0)

  620.                 {

  621.                    #if JUCE_AU_WRAPPERS_SAVE_PROGRAM_STATES

  622.                     getAudioProcessor().setCurrentProgramStateInformation (rawBytes, numBytes);

  623.                    #else

  624.                     getAudioProcessor().setStateInformation (rawBytes, numBytes);

  625.                    #endif

  626.                 }

  627.             }

  628.         }

  629. 

  630.         [modifiedState release];

  631.     }

  632. 

  633.     AUParameterTree* getParameterTree() override

  634.     {

  635.         return paramTree.get();

  636.     }

  637. 

  638.     NSArray<NSNumber*>* parametersForOverviewWithCount (int count) override

  639.     {

  640.         const int n = static_cast<int> ([overviewParams.get() count]);

  641. 

  642.         if (count >= n)

  643.             return overviewParams.get();

  644. 

  645.         NSMutableArray<NSNumber*>* retval = [[NSMutableArray<NSNumber*>alloc] initWithArray: overviewParams.get()];

  646.         [retval removeObjectsInRange: NSMakeRange (static_cast<unsigned int> (count), static_cast<unsigned int> (n - count))];

  647. 

  648.         return [retval autorelease];

  649.     }

  650. 

  651.     //==============================================================================

  652.     NSTimeInterval getLatency() override

  653.     {

  654.         auto& p = getAudioProcessor();

  655.         return p.getLatencySamples() / p.getSampleRate();

  656.     }

  657. 

  658.     NSTimeInterval getTailTime() override

  659.     {

  660.         return getAudioProcessor().getTailLengthSeconds();

  661.     }

  662. 

  663.     //==============================================================================

  664.     AUAudioUnitBusArray* getInputBusses() override            { return inputBusses.get();  }

  665.     AUAudioUnitBusArray* getOutputBusses() override           { return outputBusses.get(); }

  666.     NSArray<NSNumber*>* getChannelCapabilities() override     { return channelCapabilities.get(); }

  667. 

  668.     bool shouldChangeToFormat (AVAudioFormat* format, AUAudioUnitBus* auBus) override

  669.     {

  670.         const bool isInput = ([auBus busType] == AUAudioUnitBusTypeInput);

  671.         const int busIdx = static_cast<int> ([auBus index]);

  672.         const int newNumChannels = static_cast<int> ([format channelCount]);

  673. 

  674.         AudioProcessor& processor = getAudioProcessor();

  675. 

  676.         if (AudioProcessor::Bus* bus = processor.getBus (isInput, busIdx))

  677.         {

  678.           #ifdef JucePlugin_PreferredChannelConfigurations

  679.             ignoreUnused (bus);

  680. 

  681.             short configs[][2] = {JucePlugin_PreferredChannelConfigurations};

  682. 

  683.             if (! AudioUnitHelpers::isLayoutSupported (processor, isInput, busIdx, newNumChannels, configs))

  684.                 return false;

  685.           #else

  686.             const AVAudioChannelLayout* layout    = [format channelLayout];

  687.             const AudioChannelLayoutTag layoutTag = (layout != nullptr ? [layout layoutTag] : 0);

  688. 

  689.             if (layoutTag != 0)

  690.             {

  691.                 AudioChannelSet newLayout = CoreAudioLayouts::fromCoreAudio (layoutTag);

  692. 

  693.                 if (newLayout.size() != newNumChannels)

  694.                     return false;

  695. 

  696.                 if (! bus->isLayoutSupported (newLayout))

  697.                     return false;

  698.             }

  699.             else

  700.             {

  701.                 if (! bus->isNumberOfChannelsSupported (newNumChannels))

  702.                     return false;

  703.             }

  704.            #endif

  705. 

  706.             return true;

  707.         }

  708. 

  709.         return false;

  710.     }

  711. 

  712.     //==============================================================================

  713.     int getVirtualMIDICableCount() override

  714.     {

  715.        #if JucePlugin_WantsMidiInput

  716.         return 1;

  717.        #else

  718.         return 0;

  719.        #endif

  720.     }

  721. 

  722.     bool getSupportsMPE() override

  723.     {

  724.         return getAudioProcessor().supportsMPE();

  725.     }

  726. 

  727.     NSArray<NSString*>* getMIDIOutputNames() override

  728.     {

  729.        #if JucePlugin_ProducesMidiOutput

  730.         return @[@"MIDI Out"];

  731.        #else

  732.         return @[];

  733.        #endif

  734.     }

  735. 

  736.     //==============================================================================

  737.     AUInternalRenderBlock getInternalRenderBlock() override   { return internalRenderBlock;  }

  738.     bool getRenderingOffline() override                       { return getAudioProcessor().isNonRealtime(); }

  739.     void setRenderingOffline (bool offline) override

  740.     {

  741.         auto& processor = getAudioProcessor();

  742.         auto isCurrentlyNonRealtime = processor.isNonRealtime();

  743. 

  744.         if (isCurrentlyNonRealtime != offline)

  745.         {

  746.             ScopedLock callbackLock (processor.getCallbackLock());

  747. 

  748.             processor.setNonRealtime (offline);

  749.             processor.prepareToPlay (processor.getSampleRate(), processor.getBlockSize());

  750.         }

  751.     }

  752. 

  753.     bool getShouldBypassEffect() override

  754.     {

  755.         if (bypassParam != nullptr)

  756.             return (bypassParam->getValue() != 0.0f);

  757. 

  758.         return JuceAudioUnitv3Base::getShouldBypassEffect();

  759.     }

  760. 

  761.     void setShouldBypassEffect (bool shouldBypass) override

  762.     {

  763.         if (bypassParam != nullptr)

  764.             bypassParam->setValue (shouldBypass ? 1.0f : 0.0f);

  765. 

  766.         JuceAudioUnitv3Base::setShouldBypassEffect (shouldBypass);

  767.     }

  768. 

  769.     //==============================================================================

  770.     NSString* getContextName() const    override              { return juceStringToNS (contextName); }

  771.     void setContextName (NSString* str) override

  772.     {

  773.         if (str != nullptr)

  774.         {

  775.             AudioProcessor::TrackProperties props;

  776.             props.name = nsStringToJuce (str);

  777. 

  778.             getAudioProcessor().updateTrackProperties (props);

  779.         }

  780.     }

  781. 

  782.     //==============================================================================

  783.     bool allocateRenderResourcesAndReturnError (NSError **outError) override

  784.     {

  785.         AudioProcessor& processor = getAudioProcessor();

  786.         const AUAudioFrameCount maxFrames = [getAudioUnit() maximumFramesToRender];

  787. 

  788.         if (! JuceAudioUnitv3Base::allocateRenderResourcesAndReturnError (outError))

  789.             return false;

  790. 

  791.         if (outError != nullptr)

  792.             *outError = nullptr;

  793. 

  794.         AudioProcessor::BusesLayout layouts;

  795.         for (int dir = 0; dir < 2; ++dir)

  796.         {

  797.             const bool isInput = (dir == 0);

  798.             const int n = AudioUnitHelpers::getBusCount (&processor, isInput);

  799.             Array<AudioChannelSet>& channelSets = (isInput ? layouts.inputBuses : layouts.outputBuses);

  800. 

  801.             AUAudioUnitBusArray* auBuses = (isInput ? [getAudioUnit() inputBusses] : [getAudioUnit() outputBusses]);

  802.             jassert ([auBuses count] == static_cast<NSUInteger> (n));

  803. 

  804.             for (int busIdx = 0; busIdx < n; ++busIdx)

  805.             {

  806.                 AudioProcessor::Bus* bus = processor.getBus (isInput, busIdx);

  807.                 AVAudioFormat* format = [[auBuses objectAtIndexedSubscript:static_cast<NSUInteger> (busIdx)] format];

  808. 

  809.                 AudioChannelSet newLayout;

  810.                 const AVAudioChannelLayout* layout    = [format channelLayout];

  811.                 const AudioChannelLayoutTag layoutTag = (layout != nullptr ? [layout layoutTag] : 0);

  812. 

  813.                 if (layoutTag != 0)

  814.                     newLayout = CoreAudioLayouts::fromCoreAudio (layoutTag);

  815.                 else

  816.                     newLayout = bus->supportedLayoutWithChannels (static_cast<int> ([format channelCount]));

  817. 

  818.                 if (newLayout.isDisabled())

  819.                     return false;

  820. 

  821.                 channelSets.add (newLayout);

  822.             }

  823.         }

  824. 

  825.        #ifdef JucePlugin_PreferredChannelConfigurations

  826.         short configs[][2] = {JucePlugin_PreferredChannelConfigurations};

  827. 

  828.         if (! AudioProcessor::containsLayout (layouts, configs))

  829.         {

  830.             if (outError != nullptr)

  831.                 *outError = [NSError errorWithDomain:NSOSStatusErrorDomain code:kAudioUnitErr_FormatNotSupported userInfo:nullptr];

  832. 

  833.             return false;

  834.         }

  835.        #endif

  836. 

  837.         if (! AudioUnitHelpers::setBusesLayout (&getAudioProcessor(), layouts))

  838.         {

  839.             if (outError != nullptr)

  840.                 *outError = [NSError errorWithDomain:NSOSStatusErrorDomain code:kAudioUnitErr_FormatNotSupported userInfo:nullptr];

  841. 

  842.             return false;

  843.         }

  844. 

  845.         totalInChannels  = processor.getTotalNumInputChannels();

  846.         totalOutChannels = processor.getTotalNumOutputChannels();

  847. 

  848.         allocateBusBuffer (true);

  849.         allocateBusBuffer (false);

  850. 

  851.         mapper.alloc();

  852. 

  853.         audioBuffer.prepare (totalInChannels, totalOutChannels, static_cast<int> (maxFrames));

  854. 

  855.         double sampleRate = (jmax (AudioUnitHelpers::getBusCount (&processor, true), AudioUnitHelpers::getBusCount (&processor, false)) > 0 ?

  856.                              [[[([inputBusses.get() count] > 0 ? inputBusses.get() : outputBusses.get()) objectAtIndexedSubscript: 0] format] sampleRate] : 44100.0);

  857. 

  858.         processor.setRateAndBufferSizeDetails (sampleRate, static_cast<int> (maxFrames));

  859.         processor.prepareToPlay (sampleRate, static_cast<int> (maxFrames));

  860. 

  861.         midiMessages.ensureSize (2048);

  862.         midiMessages.clear();

  863. 

  864.         zeromem (&lastAudioHead, sizeof (lastAudioHead));

  865.         hostMusicalContextCallback = [getAudioUnit() musicalContextBlock];

  866.         hostTransportStateCallback = [getAudioUnit() transportStateBlock];

  867. 

  868.         reset();

  869. 

  870.         return true;

  871.     }

  872. 

  873.     void deallocateRenderResources() override

  874.     {

  875.         hostMusicalContextCallback = nullptr;

  876.         hostTransportStateCallback = nullptr;

  877. 

  878.         getAudioProcessor().releaseResources();

  879.         audioBuffer.release();

  880. 

  881.         inBusBuffers. clear();

  882.         outBusBuffers.clear();

  883. 

  884.         mapper.release();

  885. 

  886.         JuceAudioUnitv3Base::deallocateRenderResources();

  887.     }

  888. 

  889.     //==============================================================================

  890.    #if JUCE_AUV3_VIEW_CONFIG_SUPPORTED

  891.     NSIndexSet* getSupportedViewConfigurations (NSArray<AUAudioUnitViewConfiguration*>* configs) override

  892.     {

  893.         auto supportedViewIndecies = [[NSMutableIndexSet alloc] init];

  894.         auto n = [configs count];

  895. 

  896.         if (auto* editor = getAudioProcessor().createEditorIfNeeded())

  897.         {

  898.             // If you hit this assertion then your plug-in's editor is reporting that it doesn't support

  899.             // any host MIDI controller configurations!

  900.             jassert (editor->supportsHostMIDIControllerPresence (true) || editor->supportsHostMIDIControllerPresence (false));

  901. 

  902.             for (auto i = 0u; i < n; ++i)

  903.             {

  904.                 if (auto viewConfiguration = [configs objectAtIndex: i])

  905.                 {

  906.                     if (editor->supportsHostMIDIControllerPresence ([viewConfiguration hostHasController] == YES))

  907.                     {

  908.                         auto* constrainer = editor->getConstrainer();

  909.                         auto height = (int) [viewConfiguration height];

  910.                         auto width  = (int) [viewConfiguration width];

  911. 

  912.                         if (height <= constrainer->getMaximumHeight() && height >= constrainer->getMinimumHeight()

  913.                          && width  <= constrainer->getMaximumWidth()  && width  >= constrainer->getMinimumWidth())

  914.                             [supportedViewIndecies addIndex: i];

  915.                     }

  916.                 }

  917.             }

  918.         }

  919. 

  920.         return [supportedViewIndecies autorelease];

  921.     }

  922. 

  923.     void selectViewConfiguration (AUAudioUnitViewConfiguration* config) override

  924.     {

  925.         processorHolder->viewConfiguration.reset (new AudioProcessorHolder::ViewConfig { [config width], [config height], [config hostHasController] == YES });

  926.     }

  927.    #endif

  928. 

  929.     //==============================================================================

  930.     void audioProcessorChanged (AudioProcessor* processor) override

  931.     {

  932.         ignoreUnused (processor);

  933. 

  934.         [au willChangeValueForKey: @"allParameterValues"];

  935.         addPresets();

  936.         [au didChangeValueForKey: @"allParameterValues"];

  937.     }

  938. 

  939.     void audioProcessorParameterChanged (AudioProcessor*, int idx, float newValue) override

  940.     {

  941.         if (inParameterChangedCallback.get())

  942.         {

  943.             inParameterChangedCallback = false;

  944.             return;

  945.         }

  946. 

  947.         if (auto* juceParam = juceParameters.getParamForIndex (idx))

  948.         {

  949.             if (AUParameter* param = [paramTree.get() parameterWithAddress: getAUParameterAddressForIndex (idx)])

  950.             {

  951.                 newValue *= getMaximumParameterValue (juceParam);

  952. 

  953.                 if (editorObserverToken != nullptr)

  954.                     [param setValue: newValue  originator: editorObserverToken];

  955.                 else

  956.                     [param setValue: newValue];

  957.             }

  958.         }

  959.     }

  960. 

  961.     //==============================================================================

  962.     bool getCurrentPosition (CurrentPositionInfo& info) override

  963.     {

  964.         bool musicContextCallSucceeded = false;

  965.         bool transportStateCallSucceeded = false;

  966. 

  967.         info = lastAudioHead;

  968.         info.timeInSamples = (int64) (lastTimeStamp.mSampleTime + 0.5);

  969.         info.timeInSeconds = info.timeInSamples / getAudioProcessor().getSampleRate();

  970. 

  971.         switch (lastTimeStamp.mSMPTETime.mType)

  972.         {

  973.             case kSMPTETimeType2398:        info.frameRate = AudioPlayHead::fps23976; break;

  974.             case kSMPTETimeType24:          info.frameRate = AudioPlayHead::fps24; break;

  975.             case kSMPTETimeType25:          info.frameRate = AudioPlayHead::fps25; break;

  976.             case kSMPTETimeType2997:        info.frameRate = AudioPlayHead::fps2997; break;

  977.             case kSMPTETimeType2997Drop:    info.frameRate = AudioPlayHead::fps2997drop; break;

  978.             case kSMPTETimeType30Drop:      info.frameRate = AudioPlayHead::fps30drop; break;

  979.             case kSMPTETimeType30:          info.frameRate = AudioPlayHead::fps30; break;

  980.             case kSMPTETimeType60Drop:      info.frameRate = AudioPlayHead::fps60drop; break;

  981.             case kSMPTETimeType60:          info.frameRate = AudioPlayHead::fps60; break;

  982.             default:                        info.frameRate = AudioPlayHead::fpsUnknown; break;

  983.         }

  984. 

  985.         double num;

  986.         NSInteger den;

  987.         NSInteger outDeltaSampleOffsetToNextBeat;

  988.         double outCurrentMeasureDownBeat, bpm;

  989.         double ppqPosition;

  990. 

  991.         if (hostMusicalContextCallback != nullptr)

  992.         {

  993.             AUHostMusicalContextBlock musicalContextCallback = hostMusicalContextCallback;

  994. 

  995.             if (musicalContextCallback (&bpm, &num, &den, &ppqPosition, &outDeltaSampleOffsetToNextBeat, &outCurrentMeasureDownBeat))

  996.             {

  997.                 musicContextCallSucceeded = true;

  998. 

  999.                 info.timeSigNumerator   = (int) num;

  1000.                 info.timeSigDenominator = (int) den;

  1001.                 info.ppqPositionOfLastBarStart = outCurrentMeasureDownBeat;

  1002.                 info.bpm = bpm;

  1003.                 info.ppqPosition = ppqPosition;

  1004.                 info.ppqPositionOfLastBarStart = outCurrentMeasureDownBeat;

  1005.             }

  1006.         }

  1007. 

  1008.         double outCurrentSampleInTimeLine, outCycleStartBeat = 0, outCycleEndBeat = 0;

  1009.         AUHostTransportStateFlags flags;

  1010. 

  1011.         if (hostTransportStateCallback != nullptr)

  1012.         {

  1013.             AUHostTransportStateBlock transportStateCallback = hostTransportStateCallback;

  1014. 

  1015.             if (transportStateCallback (&flags, &outCurrentSampleInTimeLine, &outCycleStartBeat, &outCycleEndBeat))

  1016.             {

  1017.                 transportStateCallSucceeded = true;

  1018. 

  1019.                 info.timeInSamples  = (int64) (outCurrentSampleInTimeLine + 0.5);

  1020.                 info.timeInSeconds  = info.timeInSamples / getAudioProcessor().getSampleRate();

  1021.                 info.isPlaying      = ((flags & AUHostTransportStateMoving) != 0);

  1022.                 info.isLooping      = ((flags & AUHostTransportStateCycling) != 0);

  1023.                 info.isRecording    = ((flags & AUHostTransportStateRecording) != 0);

  1024.                 info.ppqLoopStart   = outCycleStartBeat;

  1025.                 info.ppqLoopEnd     = outCycleEndBeat;

  1026.             }

  1027.         }

  1028. 

  1029.         if (musicContextCallSucceeded && transportStateCallSucceeded)

  1030.             lastAudioHead = info;

  1031. 

  1032.         return true;

  1033.     }

  1034. 

  1035.     //==============================================================================

  1036.     static void removeEditor (AudioProcessor& processor)

  1037.     {

  1038.         ScopedLock editorLock (processor.getCallbackLock());

  1039. 

  1040.         if (AudioProcessorEditor* editor = processor.getActiveEditor())

  1041.         {

  1042.             processor.editorBeingDeleted (editor);

  1043.             delete editor;

  1044.         }

  1045.     }

  1046. 

  1047. private:

  1048.     //==============================================================================

  1049.     struct BusBuffer

  1050.     {

  1051.         BusBuffer (AUAudioUnitBus* bus, int maxFramesPerBuffer)

  1052.             : auBus (bus),

  1053.               maxFrames (maxFramesPerBuffer),

  1054.               numberOfChannels (static_cast<int> ([[auBus format] channelCount])),

  1055.               isInterleaved ([[auBus format] isInterleaved])

  1056.         {

  1057.             alloc();

  1058.         }

  1059. 

  1060.         //==============================================================================

  1061.         void alloc()

  1062.         {

  1063.             const int numBuffers = isInterleaved ? 1 : numberOfChannels;

  1064.             int bytes = static_cast<int> (sizeof (AudioBufferList))

  1065.                           + ((numBuffers - 1) * static_cast<int> (sizeof (::AudioBuffer)));

  1066.             jassert (bytes > 0);

  1067. 

  1068.             bufferListStorage.calloc (static_cast<size_t> (bytes));

  1069.             bufferList = reinterpret_cast<AudioBufferList*> (bufferListStorage.getData());

  1070. 

  1071.             const int bufferChannels = isInterleaved ? numberOfChannels : 1;

  1072.             scratchBuffer.setSize (numBuffers, bufferChannels * maxFrames);

  1073.         }

  1074. 

  1075.         void dealloc()

  1076.         {

  1077.             bufferList = nullptr;

  1078.             bufferListStorage.free();

  1079.             scratchBuffer.setSize (0, 0);

  1080.         }

  1081. 

  1082.         //==============================================================================

  1083.         int numChannels() const noexcept                { return numberOfChannels; }

  1084.         bool interleaved() const noexcept               { return isInterleaved; }

  1085.         AudioBufferList* get() const noexcept           { return bufferList; }

  1086. 

  1087.         //==============================================================================

  1088.         void prepare (UInt32 nFrames, const AudioBufferList* other = nullptr) noexcept

  1089.         {

  1090.             const int numBuffers = isInterleaved ? 1 : numberOfChannels;

  1091.             const bool isCompatible = isCompatibleWith (other);

  1092. 

  1093.             bufferList->mNumberBuffers = static_cast<UInt32> (numBuffers);

  1094. 

  1095.             for (int i = 0; i < numBuffers; ++i)

  1096.             {

  1097.                 const UInt32 bufferChannels = static_cast<UInt32> (isInterleaved ? numberOfChannels : 1);

  1098.                 bufferList->mBuffers[i].mNumberChannels = bufferChannels;

  1099.                 bufferList->mBuffers[i].mData = (isCompatible ? other->mBuffers[i].mData

  1100.                                                               : scratchBuffer.getWritePointer (i));

  1101.                 bufferList->mBuffers[i].mDataByteSize = nFrames * bufferChannels * sizeof (float);

  1102.             }

  1103.         }

  1104. 

  1105.         //==============================================================================

  1106.         bool isCompatibleWith (const AudioBufferList* other) const noexcept

  1107.         {

  1108.             if (other == nullptr)

  1109.                 return false;

  1110. 

  1111.             if (other->mNumberBuffers > 0)

  1112.             {

  1113.                 const bool otherInterleaved = AudioUnitHelpers::isAudioBufferInterleaved (*other);

  1114.                 const int otherChannels = static_cast<int> (otherInterleaved ? other->mBuffers[0].mNumberChannels

  1115.                                                                              : other->mNumberBuffers);

  1116. 

  1117.                 return otherInterleaved == isInterleaved

  1118.                     && numberOfChannels == otherChannels;

  1119.             }

  1120. 

  1121.             return numberOfChannels == 0;

  1122.         }

  1123. 

  1124.     private:

  1125.         AUAudioUnitBus* auBus;

  1126.         HeapBlock<char> bufferListStorage;

  1127.         AudioBufferList* bufferList = nullptr;

  1128.         int maxFrames, numberOfChannels;

  1129.         bool isInterleaved;

  1130.         AudioBuffer<float> scratchBuffer;

  1131.     };

  1132. 

  1133.     //==============================================================================

  1134.     void addAudioUnitBusses (bool isInput)

  1135.     {

  1136.         std::unique_ptr<NSMutableArray<AUAudioUnitBus*>, NSObjectDeleter> array ([[NSMutableArray<AUAudioUnitBus*> alloc] init]);

  1137.         AudioProcessor& processor = getAudioProcessor();

  1138.         const int n = AudioUnitHelpers::getBusCount (&processor, isInput);

  1139. 

  1140.         for (int i = 0; i < n; ++i)

  1141.         {

  1142.             std::unique_ptr<AUAudioUnitBus, NSObjectDeleter> audioUnitBus;

  1143. 

  1144.             {

  1145.                 std::unique_ptr<AVAudioFormat, NSObjectDeleter> defaultFormat ([[AVAudioFormat alloc] initStandardFormatWithSampleRate: kDefaultSampleRate

  1146.                                                                                                                               channels: static_cast<AVAudioChannelCount> (processor.getChannelCountOfBus (isInput, i))]);

  1147. 

  1148.                 audioUnitBus.reset ([[AUAudioUnitBus alloc] initWithFormat: defaultFormat.get()

  1149.                                                                      error: nullptr]);

  1150.             }

  1151. 

  1152.             [array.get() addObject: audioUnitBus.get()];

  1153.         }

  1154. 

  1155.         (isInput ? inputBusses : outputBusses).reset ([[AUAudioUnitBusArray alloc] initWithAudioUnit: au

  1156.                                                                                              busType: (isInput ? AUAudioUnitBusTypeInput : AUAudioUnitBusTypeOutput)

  1157.                                                                                               busses: array.get()]);

  1158.     }

  1159. 

  1160.     // When parameters are discrete we need to use integer values.

  1161.     float getMaximumParameterValue (AudioProcessorParameter* juceParam)

  1162.     {

  1163.        #if JUCE_FORCE_LEGACY_PARAMETER_AUTOMATION_TYPE

  1164.         ignoreUnused (juceParam);

  1165.         return 1.0f;

  1166.        #else

  1167.         return juceParam->isDiscrete() ? (float) (juceParam->getNumSteps() - 1) : 1.0f;

  1168.        #endif

  1169.     }

  1170. 

  1171.     std::unique_ptr<AUParameter, NSObjectDeleter> createParameter (AudioProcessorParameter* parameter)

  1172.     {

  1173.         const String name (parameter->getName (512));

  1174. 

  1175.         AudioUnitParameterUnit unit = kAudioUnitParameterUnit_Generic;

  1176.         AudioUnitParameterOptions flags = (UInt32) (kAudioUnitParameterFlag_IsWritable

  1177.                                                   | kAudioUnitParameterFlag_IsReadable

  1178.                                                   | kAudioUnitParameterFlag_HasCFNameString

  1179.                                                   | kAudioUnitParameterFlag_ValuesHaveStrings);

  1180. 

  1181.        #if ! JUCE_FORCE_LEGACY_PARAMETER_AUTOMATION_TYPE

  1182.         flags |= (UInt32) kAudioUnitParameterFlag_IsHighResolution;

  1183.        #endif

  1184. 

  1185.         // Set whether the param is automatable (unnamed parameters aren't allowed to be automated).

  1186.         if (name.isEmpty() || ! parameter->isAutomatable())

  1187.             flags |= kAudioUnitParameterFlag_NonRealTime;

  1188. 

  1189.         const bool isParameterDiscrete = parameter->isDiscrete();

  1190. 

  1191.         if (! isParameterDiscrete)

  1192.             flags |= kAudioUnitParameterFlag_CanRamp;

  1193. 

  1194.         if (parameter->isMetaParameter())

  1195.             flags |= kAudioUnitParameterFlag_IsGlobalMeta;

  1196. 

  1197.         std::unique_ptr<NSMutableArray, NSObjectDeleter> valueStrings;

  1198. 

  1199.         // Is this a meter?

  1200.         if (((parameter->getCategory() & 0xffff0000) >> 16) == 2)

  1201.         {

  1202.             flags &= ~kAudioUnitParameterFlag_IsWritable;

  1203.             flags |= kAudioUnitParameterFlag_MeterReadOnly | kAudioUnitParameterFlag_DisplayLogarithmic;

  1204.             unit = kAudioUnitParameterUnit_LinearGain;

  1205.         }

  1206.         else

  1207.         {

  1208.            #if ! JUCE_FORCE_LEGACY_PARAMETER_AUTOMATION_TYPE

  1209.             if (parameter->isDiscrete())

  1210.             {

  1211.                 unit = parameter->isBoolean() ? kAudioUnitParameterUnit_Boolean : kAudioUnitParameterUnit_Indexed;

  1212.                 auto maxValue = getMaximumParameterValue (parameter);

  1213.                 auto numSteps = parameter->getNumSteps();

  1214. 

  1215.                 // Some hosts can't handle the huge numbers of discrete parameter values created when

  1216.                 // using the default number of steps.

  1217.                 jassert (numSteps != AudioProcessor::getDefaultNumParameterSteps());

  1218. 

  1219.                 valueStrings.reset ([NSMutableArray new]);

  1220. 

  1221.                 for (int i = 0; i < numSteps; ++i)

  1222.                     [valueStrings.get() addObject: juceStringToNS (parameter->getText ((float) i / maxValue, 0))];

  1223.             }

  1224.            #endif

  1225.         }

  1226. 

  1227.         AUParameterAddress address = generateAUParameterAddress (parameter);

  1228. 

  1229.        #if ! JUCE_FORCE_USE_LEGACY_PARAM_IDS

  1230.         // If you hit this assertion then you have either put a parameter in two groups or you are

  1231.         // very unlucky and the hash codes of your parameter ids are not unique.

  1232.         jassert (! paramMap.contains (static_cast<int64> (address)));

  1233. 

  1234.         paramAddresses.add (address);

  1235.         paramMap.set (static_cast<int64> (address), parameter->getParameterIndex());

  1236.        #endif

  1237. 

  1238.         auto getParameterIdentifier = [parameter]

  1239.         {

  1240.             if (auto* paramWithID = dynamic_cast<AudioProcessorParameterWithID*> (parameter))

  1241.                 return paramWithID->paramID;

  1242. 

  1243.             // This could clash if any groups have been given integer IDs!

  1244.             return String (parameter->getParameterIndex());

  1245.         };

  1246. 

  1247.         std::unique_ptr<AUParameter, NSObjectDeleter> param;

  1248. 

  1249.         @try

  1250.         {

  1251.             // Create methods in AUParameterTree return unretained objects (!) -> see Apple header AUAudioUnitImplementation.h

  1252.             param.reset([[AUParameterTree createParameterWithIdentifier: juceStringToNS (getParameterIdentifier())

  1253.                                                                    name: juceStringToNS (name)

  1254.                                                                 address: address

  1255.                                                                     min: 0.0f

  1256.                                                                     max: getMaximumParameterValue (parameter)

  1257.                                                                    unit: unit

  1258.                                                                unitName: nullptr

  1259.                                                                   flags: flags

  1260.                                                            valueStrings: valueStrings.get()

  1261.                                                     dependentParameters: nullptr]

  1262.                          retain]);

  1263.         }

  1264. 

  1265.         @catch (NSException* exception)

  1266.         {

  1267.             // Do you have duplicate identifiers in any of your groups or parameters,

  1268.             // or do your identifiers have unusual characters in them?

  1269.             jassertfalse;

  1270.         }

  1271. 

  1272.         [param.get() setValue: parameter->getDefaultValue()];

  1273. 

  1274.         [overviewParams.get() addObject: [NSNumber numberWithUnsignedLongLong: address]];

  1275. 

  1276.         return param;

  1277.     }

  1278. 

  1279.     std::unique_ptr<AUParameterGroup, NSObjectDeleter> createParameterGroup (AudioProcessorParameterGroup* group)

  1280.     {

  1281.         std::unique_ptr<NSMutableArray<AUParameterNode*>, NSObjectDeleter> children ([NSMutableArray<AUParameterNode*> new]);

  1282. 

  1283.         for (auto* node : *group)

  1284.         {

  1285.             if (auto* childGroup = node->getGroup())

  1286.                 [children.get() addObject: createParameterGroup (childGroup).get()];

  1287.             else

  1288.                 [children.get() addObject: createParameter (node->getParameter()).get()];

  1289.         }

  1290. 

  1291.         std::unique_ptr<AUParameterGroup, NSObjectDeleter> result;

  1292. 

  1293.         @try

  1294.         {

  1295.             // Create methods in AUParameterTree return unretained objects (!) -> see Apple header AUAudioUnitImplementation.h

  1296.             result.reset ([[AUParameterTree createGroupWithIdentifier: juceStringToNS (group->getID())

  1297.                                                                  name: juceStringToNS (group->getName())

  1298.                                                              children: children.get()]

  1299.                            retain]);

  1300.         }

  1301. 

  1302.         @catch (NSException* exception)

  1303.         {

  1304.             // Do you have duplicate identifiers in any of your groups or parameters,

  1305.             // or do your identifiers have unusual characters in them?

  1306.             jassertfalse;

  1307.         }

  1308. 

  1309.         return result;

  1310.     }

  1311. 

  1312.     void addParameters()

  1313.     {

  1314.         auto& processor = getAudioProcessor();

  1315.         juceParameters.update (processor, forceLegacyParamIDs);

  1316. 

  1317.         // This is updated when we build the tree.

  1318.         overviewParams.reset ([NSMutableArray<NSNumber*> new]);

  1319. 

  1320.         std::unique_ptr<NSMutableArray<AUParameterNode*>, NSObjectDeleter> topLevelNodes ([NSMutableArray<AUParameterNode*> new]);

  1321. 

  1322.         for (auto* node : processor.getParameterTree())

  1323.             if (auto* childGroup = node->getGroup())

  1324.                 [topLevelNodes.get() addObject: createParameterGroup (childGroup).get()];

  1325.             else

  1326.                 [topLevelNodes.get() addObject: createParameter (node->getParameter()).get()];

  1327. 

  1328.         @try

  1329.         {

  1330.             // Create methods in AUParameterTree return unretained objects (!) -> see Apple header AUAudioUnitImplementation.h

  1331.             paramTree.reset ([[AUParameterTree createTreeWithChildren: topLevelNodes.get()] retain]);

  1332.         }

  1333. 

  1334.         @catch (NSException* exception)

  1335.         {

  1336.             // Do you have duplicate identifiers in any of your groups or parameters,

  1337.             // or do your identifiers have unusual characters in them?

  1338.             jassertfalse;

  1339.         }

  1340. 

  1341.         paramObserver           = CreateObjCBlock (this, &JuceAudioUnitv3::valueChangedFromHost);

  1342.         paramProvider           = CreateObjCBlock (this, &JuceAudioUnitv3::getValue);

  1343.         stringFromValueProvider = CreateObjCBlock (this, &JuceAudioUnitv3::stringFromValue);

  1344.         valueFromStringProvider = CreateObjCBlock (this, &JuceAudioUnitv3::valueFromString);

  1345. 

  1346.         [paramTree.get() setImplementorValueObserver: paramObserver];

  1347.         [paramTree.get() setImplementorValueProvider: paramProvider];

  1348.         [paramTree.get() setImplementorStringFromValueCallback: stringFromValueProvider];

  1349.         [paramTree.get() setImplementorValueFromStringCallback: valueFromStringProvider];

  1350. 

  1351.         if (processor.hasEditor())

  1352.         {

  1353.             editorParamObserver = CreateObjCBlock (this, &JuceAudioUnitv3::valueChangedForObserver);

  1354.             editorObserverToken = [paramTree.get() tokenByAddingParameterObserver: editorParamObserver];

  1355.         }

  1356. 

  1357.         if ((bypassParam = processor.getBypassParameter()) != nullptr)

  1358.             bypassParam->addListener (this);

  1359.     }

  1360. 

  1361.     void setAudioProcessorParameter (AudioProcessorParameter* juceParam, float value)

  1362.     {

  1363.         if (value != juceParam->getValue())

  1364.         {

  1365.             juceParam->setValue (value);

  1366. 

  1367.             inParameterChangedCallback = true;

  1368.             juceParam->sendValueChangedMessageToListeners (value);

  1369.         }

  1370.     }

  1371. 

  1372.     void addPresets()

  1373.     {

  1374.         factoryPresets.reset ([[NSMutableArray<AUAudioUnitPreset*> alloc] init]);

  1375. 

  1376.         const int n = getAudioProcessor().getNumPrograms();

  1377. 

  1378.         for (int idx = 0; idx < n; ++idx)

  1379.         {

  1380.             String name = getAudioProcessor().getProgramName (idx);

  1381. 

  1382.             std::unique_ptr<AUAudioUnitPreset, NSObjectDeleter> preset ([[AUAudioUnitPreset alloc] init]);

  1383.             [preset.get() setName: juceStringToNS (name)];

  1384.             [preset.get() setNumber: static_cast<NSInteger> (idx)];

  1385. 

  1386.             [factoryPresets.get() addObject: preset.get()];

  1387.         }

  1388.     }

  1389. 

  1390.     //==============================================================================

  1391.     void allocateBusBuffer (bool isInput)

  1392.     {

  1393.         OwnedArray<BusBuffer>& busBuffers = isInput ? inBusBuffers : outBusBuffers;

  1394.         busBuffers.clear();

  1395. 

  1396.         const int n = AudioUnitHelpers::getBusCount (&getAudioProcessor(), isInput);

  1397.         const AUAudioFrameCount maxFrames = [getAudioUnit() maximumFramesToRender];

  1398. 

  1399.         for (int busIdx = 0; busIdx < n; ++busIdx)

  1400.             busBuffers.add (new BusBuffer ([(isInput ? inputBusses.get() : outputBusses.get()) objectAtIndexedSubscript: static_cast<unsigned int> (busIdx)],

  1401.                                            static_cast<int> (maxFrames)));

  1402.     }

  1403. 

  1404.     //==============================================================================

  1405.     void processEvents (const AURenderEvent *__nullable realtimeEventListHead, int numParams, AUEventSampleTime startTime)

  1406.     {

  1407.         ignoreUnused (numParams);

  1408. 

  1409.         for (const AURenderEvent* event = realtimeEventListHead; event != nullptr; event = event->head.next)

  1410.         {

  1411.             switch (event->head.eventType)

  1412.             {

  1413.                 case AURenderEventMIDI:

  1414.                 {

  1415.                     const AUMIDIEvent& midiEvent = event->MIDI;

  1416.                     midiMessages.addEvent (midiEvent.data, midiEvent.length, static_cast<int> (midiEvent.eventSampleTime - startTime));

  1417.                 }

  1418.                 break;

  1419. 

  1420.                 case AURenderEventParameter:

  1421.                 case AURenderEventParameterRamp:

  1422.                 {

  1423.                     const AUParameterEvent& paramEvent = event->parameter;

  1424. 

  1425.                     if (auto* p = getJuceParameterForAUAddress (paramEvent.parameterAddress))

  1426.                         setAudioProcessorParameter (p, paramEvent.value);

  1427.                 }

  1428.                 break;

  1429. 

  1430.                 default:

  1431.                     break;

  1432.             }

  1433.         }

  1434.     }

  1435. 

  1436.     AUAudioUnitStatus renderCallback (AudioUnitRenderActionFlags* actionFlags, const AudioTimeStamp* timestamp, AUAudioFrameCount frameCount,

  1437.                                       NSInteger outputBusNumber, AudioBufferList* outputData, const AURenderEvent *__nullable realtimeEventListHead,

  1438.                                       AURenderPullInputBlock __nullable pullInputBlock)

  1439.     {

  1440.         auto& processor = getAudioProcessor();

  1441.         jassert (static_cast<int> (frameCount) <= getAudioProcessor().getBlockSize());

  1442. 

  1443.         // process params

  1444.         const int numParams = juceParameters.getNumParameters();

  1445.         processEvents (realtimeEventListHead, numParams, static_cast<AUEventSampleTime> (timestamp->mSampleTime));

  1446. 

  1447.         if (lastTimeStamp.mSampleTime != timestamp->mSampleTime)

  1448.         {

  1449.             lastTimeStamp = *timestamp;

  1450. 

  1451.             const int numInputBuses  = inBusBuffers. size();

  1452.             const int numOutputBuses = outBusBuffers.size();

  1453. 

  1454.             // prepare buffers

  1455.             {

  1456.                 for (int busIdx = 0; busIdx < numOutputBuses; ++busIdx)

  1457.                 {

  1458.                      BusBuffer& busBuffer = *outBusBuffers[busIdx];

  1459.                      const bool canUseDirectOutput =

  1460.                          (busIdx == outputBusNumber && outputData != nullptr && outputData->mNumberBuffers > 0);

  1461. 

  1462.                     busBuffer.prepare (frameCount, canUseDirectOutput ? outputData : nullptr);

  1463.                 }

  1464. 

  1465.                 for (int busIdx = 0; busIdx < numInputBuses; ++busIdx)

  1466.                 {

  1467.                     BusBuffer& busBuffer = *inBusBuffers[busIdx];

  1468.                     busBuffer.prepare (frameCount, busIdx < numOutputBuses ? outBusBuffers[busIdx]->get() : nullptr);

  1469.                 }

  1470. 

  1471.                 audioBuffer.reset();

  1472.             }

  1473. 

  1474.             // pull inputs

  1475.             {

  1476.                 for (int busIdx = 0; busIdx < numInputBuses; ++busIdx)

  1477.                 {

  1478.                     BusBuffer& busBuffer = *inBusBuffers[busIdx];

  1479.                     AudioBufferList* buffer = busBuffer.get();

  1480. 

  1481.                     if (pullInputBlock == nullptr || pullInputBlock (actionFlags, timestamp, frameCount, busIdx, buffer) != noErr)

  1482.                         AudioUnitHelpers::clearAudioBuffer (*buffer);

  1483. 

  1484.                     if (actionFlags != nullptr && (*actionFlags & kAudioUnitRenderAction_OutputIsSilence) != 0)

  1485.                         AudioUnitHelpers::clearAudioBuffer (*buffer);

  1486.                 }

  1487.             }

  1488. 

  1489.             // set buffer pointer to minimize copying

  1490.             {

  1491.                 int chIdx = 0;

  1492. 

  1493.                 for (int busIdx = 0; busIdx < numOutputBuses; ++busIdx)

  1494.                 {

  1495.                     BusBuffer& busBuffer = *outBusBuffers[busIdx];

  1496.                     AudioBufferList* buffer = busBuffer.get();

  1497. 

  1498.                     const bool interleaved = busBuffer.interleaved();

  1499.                     const int numChannels = busBuffer.numChannels();

  1500. 

  1501.                     const int* outLayoutMap = mapper.get (false, busIdx);

  1502. 

  1503.                     for (int ch = 0; ch < numChannels; ++ch)

  1504.                         audioBuffer.setBuffer (chIdx++, interleaved ? nullptr : static_cast<float*> (buffer->mBuffers[outLayoutMap[ch]].mData));

  1505.                 }

  1506. 

  1507.                 // use input pointers on remaining channels

  1508. 

  1509.                 for (int busIdx = 0; chIdx < totalInChannels;)

  1510.                 {

  1511.                     const int channelOffset = processor.getOffsetInBusBufferForAbsoluteChannelIndex (true, chIdx, busIdx);

  1512. 

  1513.                     BusBuffer& busBuffer = *inBusBuffers[busIdx];

  1514.                     AudioBufferList* buffer = busBuffer.get();

  1515. 

  1516.                     const int* inLayoutMap = mapper.get (true, busIdx);

  1517.                     audioBuffer.setBuffer (chIdx++,  busBuffer.interleaved() ? nullptr : static_cast<float*> (buffer->mBuffers[inLayoutMap[channelOffset]].mData));

  1518.                 }

  1519.             }

  1520. 

  1521.             // copy input

  1522.             {

  1523.                 for (int busIdx = 0; busIdx < numInputBuses; ++busIdx)

  1524.                     audioBuffer.push (*inBusBuffers[busIdx]->get(), mapper.get (true, busIdx));

  1525. 

  1526.                 // clear remaining channels

  1527.                 for (int i = totalInChannels; i < totalOutChannels; ++i)

  1528.                     zeromem (audioBuffer.push(), sizeof (float) * frameCount);

  1529.             }

  1530. 

  1531.             // process audio

  1532.             processBlock (audioBuffer.getBuffer (frameCount), midiMessages);

  1533. 

  1534.             // send MIDI

  1535.            #if JucePlugin_ProducesMidiOutput && JUCE_AUV3_MIDI_OUTPUT_SUPPORTED

  1536.             if (auto midiOut = [au MIDIOutputEventBlock])

  1537.             {

  1538.                 MidiMessage msg;

  1539.                 int samplePosition;

  1540. 

  1541.                 for (MidiBuffer::Iterator it (midiMessages); it.getNextEvent (msg, samplePosition);)

  1542.                     midiOut (samplePosition, 0, msg.getRawDataSize(), msg.getRawData());

  1543.             }

  1544.            #endif

  1545. 

  1546.             midiMessages.clear();

  1547. 

  1548.             // copy back

  1549.             audioBuffer.pop (*outBusBuffers[(int) outputBusNumber]->get(),

  1550.                              mapper.get (false, (int) outputBusNumber));

  1551.         }

  1552. 

  1553.         return noErr;

  1554.     }

  1555. 

  1556.     void processBlock (AudioBuffer<float>& buffer, MidiBuffer& midiBuffer) noexcept

  1557.     {

  1558.         auto& processor = getAudioProcessor();

  1559.         const ScopedLock sl (processor.getCallbackLock());

  1560. 

  1561.         if (processor.isSuspended())

  1562.             buffer.clear();

  1563.         else if (bypassParam != nullptr && [au shouldBypassEffect])

  1564.             processor.processBlockBypassed (buffer, midiBuffer);

  1565.         else

  1566.             processor.processBlock (buffer, midiBuffer);

  1567.     }

  1568. 

  1569.     //==============================================================================

  1570.     void valueChangedFromHost (AUParameter* param, AUValue value)

  1571.     {

  1572.         if (param != nullptr)

  1573.         {

  1574.             if (auto* p = getJuceParameterForAUAddress ([param address]))

  1575.             {

  1576.                 auto normalisedValue = value / getMaximumParameterValue (p);

  1577.                 setAudioProcessorParameter (p, normalisedValue);

  1578.             }

  1579.         }

  1580.     }

  1581. 

  1582.     AUValue getValue (AUParameter* param)

  1583.     {

  1584.         if (param != nullptr)

  1585.         {

  1586.             if (auto* p = getJuceParameterForAUAddress ([param address]))

  1587.                 return p->getValue() * getMaximumParameterValue (p);

  1588.         }

  1589. 

  1590.         return 0;

  1591.     }

  1592. 

  1593.     void valueChangedForObserver (AUParameterAddress, AUValue)

  1594.     {

  1595.         // this will have already been handled by valueChangedFromHost

  1596.     }

  1597. 

  1598.     NSString* stringFromValue (AUParameter* param, const AUValue* value)

  1599.     {

  1600.         String text;

  1601. 

  1602.         if (param != nullptr && value != nullptr)

  1603.         {

  1604.             if (auto* p = getJuceParameterForAUAddress ([param address]))

  1605.             {

  1606.                 if (LegacyAudioParameter::isLegacy (p))

  1607.                     text = String (*value);

  1608.                 else

  1609.                     text = p->getText (*value / getMaximumParameterValue (p), 0);

  1610.             }

  1611.         }

  1612. 

  1613.         return juceStringToNS (text);

  1614.     }

  1615. 

  1616.     AUValue valueFromString (AUParameter* param, NSString* str)

  1617.     {

  1618.         if (param != nullptr && str != nullptr)

  1619.         {

  1620.             if (auto* p = getJuceParameterForAUAddress ([param address]))

  1621.             {

  1622.                 const String text (nsStringToJuce (str));

  1623. 

  1624.                 if (LegacyAudioParameter::isLegacy (p))

  1625.                     return text.getFloatValue();

  1626.                 else

  1627.                     return p->getValueForText (text) * getMaximumParameterValue (p);

  1628.             }

  1629.         }

  1630. 

  1631.         return 0;

  1632.     }

  1633. 

  1634.     //==============================================================================

  1635.     // this is only ever called for the bypass parameter

  1636.     void parameterValueChanged (int, float newValue) override

  1637.     {

  1638.         JuceAudioUnitv3Base::setShouldBypassEffect (newValue != 0.0f);

  1639.     }

  1640. 

  1641.     void parameterGestureChanged (int, bool) override {}

  1642. 

  1643.     //==============================================================================

  1644.     inline AUParameterAddress getAUParameterAddressForIndex (int paramIndex) const noexcept

  1645.     {

  1646.        #if JUCE_FORCE_USE_LEGACY_PARAM_IDS

  1647.         return static_cast<AUParameterAddress> (paramIndex);

  1648.        #else

  1649.         return paramAddresses.getReference (paramIndex);

  1650.        #endif

  1651.     }

  1652. 

  1653.     inline int getJuceParameterIndexForAUAddress (AUParameterAddress address) const noexcept

  1654.     {

  1655.        #if JUCE_FORCE_USE_LEGACY_PARAM_IDS

  1656.         return static_cast<int> (address);

  1657.        #else

  1658.         return paramMap[static_cast<int64> (address)];

  1659.        #endif

  1660.     }

  1661. 

  1662.     AUParameterAddress generateAUParameterAddress (AudioProcessorParameter* param) const

  1663.     {

  1664.         const String& juceParamID = LegacyAudioParameter::getParamID (param, forceLegacyParamIDs);

  1665. 

  1666.         return static_cast<AUParameterAddress> (forceLegacyParamIDs ? juceParamID.getIntValue()

  1667.                                                                     : juceParamID.hashCode64());

  1668.     }

  1669. 

  1670.     AudioProcessorParameter* getJuceParameterForAUAddress (AUParameterAddress address) const noexcept

  1671.     {

  1672.         return juceParameters.getParamForIndex (getJuceParameterIndexForAUAddress (address));

  1673.     }

  1674. 

  1675.     //==============================================================================

  1676.     static const double kDefaultSampleRate;

  1677. 

  1678.     AudioProcessorHolder::Ptr processorHolder;

  1679. 

  1680.     int totalInChannels, totalOutChannels;

  1681. 

  1682.     std::unique_ptr<AUAudioUnitBusArray, NSObjectDeleter> inputBusses, outputBusses;

  1683. 

  1684.     ObjCBlock<AUImplementorValueObserver> paramObserver;

  1685.     ObjCBlock<AUImplementorValueProvider> paramProvider;

  1686.     ObjCBlock<AUImplementorStringFromValueCallback> stringFromValueProvider;

  1687.     ObjCBlock<AUImplementorValueFromStringCallback> valueFromStringProvider;

  1688. 

  1689.    #if ! JUCE_FORCE_USE_LEGACY_PARAM_IDS

  1690.     Array<AUParameterAddress> paramAddresses;

  1691.     HashMap<int64, int> paramMap;

  1692.    #endif

  1693.     LegacyAudioParametersWrapper juceParameters;

  1694. 

  1695.     // to avoid recursion on parameter changes, we need to add an

  1696.     // editor observer to do the parameter changes

  1697.     ObjCBlock<AUParameterObserver> editorParamObserver;

  1698.     AUParameterObserverToken editorObserverToken;

  1699. 

  1700.     std::unique_ptr<AUParameterTree, NSObjectDeleter> paramTree;

  1701.     std::unique_ptr<NSMutableArray<NSNumber*>, NSObjectDeleter> overviewParams, channelCapabilities;

  1702. 

  1703.     std::unique_ptr<NSMutableArray<AUAudioUnitPreset*>, NSObjectDeleter> factoryPresets;

  1704. 

  1705.     ObjCBlock<AUInternalRenderBlock> internalRenderBlock;

  1706. 

  1707.     AudioUnitHelpers::CoreAudioBufferList audioBuffer;

  1708.     AudioUnitHelpers::ChannelRemapper mapper;

  1709. 

  1710.     OwnedArray<BusBuffer> inBusBuffers, outBusBuffers;

  1711.     MidiBuffer midiMessages;

  1712. 

  1713.     ObjCBlock<AUHostMusicalContextBlock> hostMusicalContextCallback;

  1714.     ObjCBlock<AUHostTransportStateBlock> hostTransportStateCallback;

  1715. 

  1716.     AudioTimeStamp lastTimeStamp;

  1717.     CurrentPositionInfo lastAudioHead;

  1718. 

  1719.     String contextName;

  1720. 

  1721.     ThreadLocalValue<bool> inParameterChangedCallback;

  1722.    #if JUCE_FORCE_USE_LEGACY_PARAM_IDS

  1723.     static constexpr bool forceLegacyParamIDs = true;

  1724.    #else

  1725.     static constexpr bool forceLegacyParamIDs = false;

  1726.    #endif

  1727.     AudioProcessorParameter* bypassParam = nullptr;

  1728. };

  1729. 

  1730. const double JuceAudioUnitv3::kDefaultSampleRate = 44100.0;

  1731. 

  1732. JuceAudioUnitv3Base* JuceAudioUnitv3Base::create (AUAudioUnit* audioUnit, AudioComponentDescription descr, AudioComponentInstantiationOptions options, NSError** error)

  1733. {

  1734.     PluginHostType::jucePlugInClientCurrentWrapperType = AudioProcessor::wrapperType_AudioUnitv3;

  1735.     return new JuceAudioUnitv3 (audioUnit, descr, options, error);

  1736. }

  1737. 

  1738. #if JUCE_IOS

  1739. namespace juce

  1740. {

  1741. struct UIViewPeerControllerReceiver

  1742. {

  1743.     virtual ~UIViewPeerControllerReceiver();

  1744.     virtual void setViewController (UIViewController*) = 0;

  1745. };

  1746. }

  1747. #endif

  1748. 

  1749. //==============================================================================

  1750. class JuceAUViewController

  1751. {

  1752. public:

  1753.     JuceAUViewController (AUViewController<AUAudioUnitFactory>* p)

  1754.         : myself (p)

  1755.     {

  1756.         PluginHostType::jucePlugInClientCurrentWrapperType = AudioProcessor::wrapperType_AudioUnitv3;

  1757.         initialiseJuce_GUI();

  1758.     }

  1759. 

  1760.     ~JuceAUViewController()

  1761.     {

  1762.         JUCE_ASSERT_MESSAGE_THREAD

  1763. 

  1764.         if (processorHolder != nullptr)

  1765.             JuceAudioUnitv3::removeEditor (getAudioProcessor());

  1766.     }

  1767. 

  1768.     //==============================================================================

  1769.     void loadView()

  1770.     {

  1771.         JUCE_ASSERT_MESSAGE_THREAD

  1772. 

  1773.         if (AudioProcessor* p = createPluginFilterOfType (AudioProcessor::wrapperType_AudioUnitv3))

  1774.         {

  1775.             processorHolder = new AudioProcessorHolder (p);

  1776.             auto& processor = getAudioProcessor();

  1777. 

  1778.             if (processor.hasEditor())

  1779.             {

  1780.                 if (AudioProcessorEditor* editor = processor.createEditorIfNeeded())

  1781.                 {

  1782.                     preferredSize = editor->getBounds();

  1783. 

  1784.                     JUCE_IOS_MAC_VIEW* view = [[[JUCE_IOS_MAC_VIEW alloc] initWithFrame: convertToCGRect (editor->getBounds())] autorelease];

  1785.                     [myself setView: view];

  1786. 

  1787.                    #if JUCE_IOS

  1788.                     editor->setVisible (false);

  1789.                    #else

  1790.                     editor->setVisible (true);

  1791.                    #endif

  1792. 

  1793.                     editor->addToDesktop (0, view);

  1794. 

  1795.                    #if JUCE_IOS

  1796.                     if (JUCE_IOS_MAC_VIEW* peerView = [[[myself view] subviews] objectAtIndex: 0])

  1797.                         [peerView setContentMode: UIViewContentModeTop];

  1798. 

  1799.                     if (auto* peer = dynamic_cast<UIViewPeerControllerReceiver*> (editor->getPeer()))

  1800.                         peer->setViewController (myself);

  1801.                    #endif

  1802.                 }

  1803.             }

  1804.         }

  1805.     }

  1806. 

  1807.     void viewDidLayoutSubviews()

  1808.     {

  1809.         if (processorHolder != nullptr && [myself view] != nullptr)

  1810.         {

  1811.             if (AudioProcessorEditor* editor = getAudioProcessor().getActiveEditor())

  1812.             {

  1813.                 if (processorHolder->viewConfiguration != nullptr)

  1814.                     editor->hostMIDIControllerIsAvailable (processorHolder->viewConfiguration->hostHasMIDIController);

  1815. 

  1816.                 editor->setBounds (convertToRectInt ([[myself view] bounds]));

  1817. 

  1818.                 if (JUCE_IOS_MAC_VIEW* peerView = [[[myself view] subviews] objectAtIndex: 0])

  1819.                 {

  1820.                    #if JUCE_IOS

  1821.                     [peerView setNeedsDisplay];

  1822.                    #else

  1823.                     [peerView setNeedsDisplay: YES];

  1824.                    #endif

  1825.                 }

  1826.             }

  1827.         }

  1828.     }

  1829. 

  1830.     void didReceiveMemoryWarning()

  1831.     {

  1832.         if (processorHolder != nullptr)

  1833.             if (auto* processor = processorHolder->get())

  1834.                 processor->memoryWarningReceived();

  1835.     }

  1836. 

  1837.     void viewDidAppear (bool)

  1838.     {

  1839.         if (processorHolder != nullptr)

  1840.             if (AudioProcessorEditor* editor = getAudioProcessor().getActiveEditor())

  1841.                 editor->setVisible (true);

  1842.     }

  1843. 

  1844.     void viewDidDisappear (bool)

  1845.     {

  1846.         if (processorHolder != nullptr)

  1847.             if (AudioProcessorEditor* editor = getAudioProcessor().getActiveEditor())

  1848.                 editor->setVisible (false);

  1849.     }

  1850. 

  1851.     CGSize getPreferredContentSize() const

  1852.     {

  1853.         return CGSizeMake (static_cast<float> (preferredSize.getWidth()),

  1854.                            static_cast<float> (preferredSize.getHeight()));

  1855.     }

  1856. 

  1857.     //==============================================================================

  1858.     AUAudioUnit* createAudioUnit (const AudioComponentDescription& descr, NSError** error)

  1859.     {

  1860.         AUAudioUnit* retval = nil;

  1861. 

  1862.         if (! MessageManager::getInstance()->isThisTheMessageThread())

  1863.         {

  1864.             WaitableEvent creationEvent;

  1865. 

  1866.             // AUv3 headers say that we may block this thread and that the message thread is guaranteed

  1867.             // to be unblocked

  1868.             struct AUCreator  : public CallbackMessage

  1869.             {

  1870.                 JuceAUViewController& owner;

  1871.                 AudioComponentDescription pDescr;

  1872.                 NSError** pError;

  1873.                 AUAudioUnit*& outAU;

  1874.                 WaitableEvent& e;

  1875. 

  1876.                 AUCreator (JuceAUViewController& parent, const AudioComponentDescription& paramDescr, NSError** paramError,

  1877.                            AUAudioUnit*& outputAU, WaitableEvent& event)

  1878.                     : owner (parent), pDescr (paramDescr), pError (paramError), outAU (outputAU), e (event)

  1879.                 {}

  1880. 

  1881.                 void messageCallback() override

  1882.                 {

  1883.                     outAU = owner.createAudioUnitOnMessageThread (pDescr, pError);

  1884.                     e.signal();

  1885.                 }

  1886.             };

  1887. 

  1888.             (new AUCreator (*this, descr, error, retval, creationEvent))->post();

  1889.             creationEvent.wait (-1);

  1890.         }

  1891.         else

  1892.         {

  1893.             retval = createAudioUnitOnMessageThread (descr, error);

  1894.         }

  1895. 

  1896.         return [retval autorelease];

  1897.     }

  1898. 

  1899. private:

  1900.     //==============================================================================

  1901.     AUViewController<AUAudioUnitFactory>* myself;

  1902.     AudioProcessorHolder::Ptr processorHolder = nullptr;

  1903.     Rectangle<int> preferredSize { 1, 1 };

  1904. 

  1905.     //==============================================================================

  1906.     AUAudioUnit* createAudioUnitOnMessageThread (const AudioComponentDescription& descr, NSError** error)

  1907.     {

  1908.         JUCE_ASSERT_MESSAGE_THREAD

  1909. 

  1910.         [myself view];  // this will call [view load] and ensure that the AudioProcessor has been instantiated

  1911. 

  1912.         if (processorHolder == nullptr)

  1913.             return nullptr;

  1914. 

  1915.         return (new JuceAudioUnitv3 (processorHolder, descr, 0, error))->getAudioUnit();

  1916.     }

  1917. 

  1918.     AudioProcessor& getAudioProcessor() const noexcept       { return **processorHolder; }

  1919. };

  1920. 

  1921. //==============================================================================

  1922. // necessary glue code

  1923. @interface JUCE_VIEWCONTROLLER_OBJC_NAME (JucePlugin_AUExportPrefix) : AUViewController<AUAudioUnitFactory>

  1924. @end

  1925. 

  1926. @implementation JUCE_VIEWCONTROLLER_OBJC_NAME (JucePlugin_AUExportPrefix)

  1927. {

  1928.     std::unique_ptr<JuceAUViewController> cpp;

  1929. }

  1930. 

  1931. - (instancetype) initWithNibName: (nullable NSString*) nib bundle: (nullable NSBundle*) bndl { self = [super initWithNibName: nib bundle: bndl]; cpp.reset (new JuceAUViewController (self)); return self; }

  1932. - (void) loadView                { cpp->loadView(); }

  1933. - (AUAudioUnit *) createAudioUnitWithComponentDescription: (AudioComponentDescription) desc error: (NSError **) error { return cpp->createAudioUnit (desc, error); }

  1934. - (CGSize) preferredContentSize  { return cpp->getPreferredContentSize(); }

  1935. - (void) viewDidLayoutSubviews   { cpp->viewDidLayoutSubviews(); }

  1936. - (void) didReceiveMemoryWarning { cpp->didReceiveMemoryWarning(); }

  1937. #if JUCE_IOS

  1938. - (void) viewDidAppear: (BOOL) animated { cpp->viewDidAppear (animated); [super viewDidAppear:animated]; }

  1939. - (void) viewDidDisappear: (BOOL) animated { cpp->viewDidDisappear (animated); [super viewDidDisappear:animated]; }

  1940. #endif

  1941. @end

  1942. 

  1943. //==============================================================================

  1944. #if JUCE_IOS

  1945. bool JUCE_CALLTYPE juce_isInterAppAudioConnected() { return false; }

  1946. void JUCE_CALLTYPE juce_switchToHostApplication()  {}

  1947. #if JUCE_MODULE_AVAILABLE_juce_gui_basics

  1948. Image JUCE_CALLTYPE juce_getIAAHostIcon (int)      { return {}; }

  1949. #endif

  1950. #endif

  1951. 

  1952. #pragma clang diagnostic pop

  1953. #endif