/*

     File: ComponentBase.cpp

 Abstract: ComponentBase.h

  Version: 1.1

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 without specific prior written permission from Apple.  Except as

 expressly stated in this notice, no other rights or licenses, express or

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 The Apple Software is provided by Apple on an "AS IS" basis.  APPLE

 MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION

 THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS

 FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND

 OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.

 IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL

 OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

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*/

#include "ComponentBase.h"

#include "CAXException.h"

#if TARGET_OS_MAC

pthread_mutex_t ComponentInitLocker::sComponentOpenMutex = PTHREAD_MUTEX_INITIALIZER;

pthread_once_t ComponentInitLocker::sOnce = PTHREAD_ONCE_INIT;

void ComponentInitLocker::InitComponentInitLocker()

{

    // have to do this because OS X lacks PTHREAD_MUTEX_RECURSIVE_INITIALIZER_NP

    pthread_mutexattr_t attr;

    pthread_mutexattr_init(&attr);

    pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);

    pthread_mutex_init(&sComponentOpenMutex, &attr);

    pthread_mutexattr_destroy(&attr);

}

#elif TARGET_OS_WIN32

CAGuard ComponentInitLocker::sComponentOpenGuard("sComponentOpenGuard");

#endif

ComponentBase::EInstanceType ComponentBase::sNewInstanceType;

static OSStatus CB_GetComponentDescription (const AudioComponentInstance inInstance, AudioComponentDescription * outDesc);

#if !CA_USE_AUDIO_PLUGIN_ONLY && !TARGET_OS_WIN32

    static OSStatus CMgr_GetComponentDescription (const AudioComponentInstance inInstance, AudioComponentDescription * outDesc);

#endif

ComponentBase::ComponentBase(AudioComponentInstance inInstance) 

    : mComponentInstance(inInstance), 

      mInstanceType(sNewInstanceType) 

{ 

    GetComponentDescription(); 

}

ComponentBase::~ComponentBase()

{

}

void            ComponentBase::PostConstructor()

{

}

void            ComponentBase::PreDestructor()

{

}

#define ACPI    ((AudioComponentPlugInInstance *)self)

#define ACImp   ((ComponentBase *)&ACPI->mInstanceStorage)

OSStatus ComponentBase::AP_Open(void *self, AudioUnit compInstance)

{

    OSStatus result = noErr;

    try {

        ComponentInitLocker lock;

        ComponentBase::sNewInstanceType = ComponentBase::kAudioComponentInstance;

        ComponentBase *cb = (ComponentBase *)(*ACPI->mConstruct)(&ACPI->mInstanceStorage, compInstance);

        cb->PostConstructor();  // allows base class to do additional initialization

        // once the derived class is fully constructed

        result = noErr;

    }

    COMPONENT_CATCH

    if (result)

        delete ACPI;

    return result;

}

OSStatus ComponentBase::AP_Close(void *self)

{

    OSStatus result = noErr;

    try {

        if (ACImp) {

            ACImp->PreDestructor();

            (*ACPI->mDestruct)(&ACPI->mInstanceStorage);

            free(self);

        }

    }

    COMPONENT_CATCH

    return result;

}

#if !CA_USE_AUDIO_PLUGIN_ONLY

OSStatus        ComponentBase::Version()

{

    return 0x00000001;

}

OSStatus        ComponentBase::ComponentEntryDispatch(ComponentParameters *p, ComponentBase *This)

{

    if (This == NULL) return kAudio_ParamError;

    OSStatus result = noErr;

    switch (p->what) {

    case kComponentCloseSelect:

        This->PreDestructor();

        delete This;

        break;

    case kComponentVersionSelect:

        result = This->Version();

        break;

    case kComponentCanDoSelect:

        switch (GetSelectorForCanDo(p)) {

        case kComponentOpenSelect:

        case kComponentCloseSelect:

        case kComponentVersionSelect:

        case kComponentCanDoSelect:

            return 1;

        default:

            return 0;

        }

    default:

        result = badComponentSelector;

        break;

    }

    return result;

}

SInt16      ComponentBase::GetSelectorForCanDo(ComponentParameters *params)

{

    if (params->what != kComponentCanDoSelect) return 0;

    #if TARGET_CPU_X86

        SInt16 sel = params->params[0];

    #elif TARGET_CPU_X86_64

        SInt16 sel = params->params[1];

    #elif TARGET_CPU_PPC

        SInt16 sel = (params->params[0] >> 16);

    #else

        SInt16 sel = params->params[0];

    #endif

    return sel;

/*      

        printf ("flags:%d, paramSize: %d, what: %d\n\t", params->flags, params->paramSize, params->what);

        for (int i = 0; i < params->paramSize; ++i) {

            printf ("[%d]:%d(0x%x), ", i, params->params[i], params->params[i]);

        }

        printf("\n\tsel:%d\n", sel);

*/

}

#endif

#if CA_DO_NOT_USE_AUDIO_COMPONENT 

static OSStatus ComponentBase_GetComponentDescription (const AudioComponentInstance & inInstance, AudioComponentDescription &outDesc);

#endif

AudioComponentDescription ComponentBase::GetComponentDescription() const

{

    AudioComponentDescription desc;

    OSStatus result = 1;

    if (IsPluginObject()) {

        ca_require_noerr(result = CB_GetComponentDescription (mComponentInstance, &desc), home);

    }

#if !CA_USE_AUDIO_PLUGIN_ONLY

    else {

        ca_require_noerr(result = CMgr_GetComponentDescription (mComponentInstance, &desc), home);  

    }

#endif

home:

    if (result)

        memset (&desc, 0, sizeof(AudioComponentDescription));

    return desc;

}

#if CA_USE_AUDIO_PLUGIN_ONLY

// everything we need is there and we should be linking against it

static OSStatus CB_GetComponentDescription (const AudioComponentInstance inInstance, AudioComponentDescription * outDesc)

{

    AudioComponent comp = AudioComponentInstanceGetComponent(inInstance);

    if (comp)

        return AudioComponentGetDescription(comp, outDesc);

    return kAudio_ParamError;

}

#elif !TARGET_OS_WIN32

// these are the direct dependencies on ComponentMgr calls that an AU

// that is a component mgr is dependent on

// these are dynamically loaded so that these calls will work on Leopard

#include <dlfcn.h>

static OSStatus CB_GetComponentDescription (const AudioComponentInstance inInstance, AudioComponentDescription * outDesc)

{

    typedef AudioComponent (*AudioComponentInstanceGetComponentProc) (AudioComponentInstance);

    static AudioComponentInstanceGetComponentProc aciGCProc = NULL;

    typedef OSStatus (*AudioComponentGetDescriptionProc)(AudioComponent, AudioComponentDescription *);

    static AudioComponentGetDescriptionProc acGDProc = NULL;

    static int doneInit = 0;

    if (doneInit == 0) {

        doneInit = 1;   

        void* theImage = dlopen("/System/Library/Frameworks/AudioUnit.framework/AudioUnit", RTLD_LAZY);

        if (theImage != NULL)

        {

            aciGCProc = (AudioComponentInstanceGetComponentProc)dlsym (theImage, "AudioComponentInstanceGetComponent");

            if (aciGCProc) {

                acGDProc = (AudioComponentGetDescriptionProc)dlsym (theImage, "AudioComponentGetDescription");

            }

        }

    }

    OSStatus result = kAudio_UnimplementedError;

    if (acGDProc && aciGCProc) {

        AudioComponent comp = (*aciGCProc)(inInstance);

        if (comp)

            result = (*acGDProc)(comp, outDesc);

    } 

#if !CA_USE_AUDIO_PLUGIN_ONLY

    else {

        result = CMgr_GetComponentDescription (inInstance, outDesc);

    }

#endif

    return result;

}

#if !CA_USE_AUDIO_PLUGIN_ONLY

// these are the direct dependencies on ComponentMgr calls that an AU

// that is a component mgr is dependent on

// these are dynamically loaded

#include <CoreServices/CoreServices.h>

#include <AudioUnit/AudioUnit.h>

#include "CAXException.h"

#include "ComponentBase.h"

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

// Component Manager

// Used for fast dispatch with audio units

typedef Handle (*GetComponentInstanceStorageProc)(ComponentInstance aComponentInstance);

static GetComponentInstanceStorageProc sGetComponentInstanceStorageProc = NULL;

typedef OSErr (*GetComponentInfoProc)(Component, ComponentDescription *, void*, void*, void*);

static GetComponentInfoProc sGetComponentInfoProc = NULL;

typedef void (*SetComponentInstanceStorageProc)(ComponentInstance, Handle);

static SetComponentInstanceStorageProc sSetComponentInstanceStorageProc = NULL;

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

static void CSInitOnce(void* /*unused*/)

{

    void *theImage = dlopen("/System/Library/Frameworks/CoreServices.framework/CoreServices", RTLD_LAZY);

    if (!theImage) return;

    sGetComponentInstanceStorageProc = (GetComponentInstanceStorageProc) dlsym(theImage, "GetComponentInstanceStorage");

    sGetComponentInfoProc = (GetComponentInfoProc)dlsym (theImage, "GetComponentInfo");

    sSetComponentInstanceStorageProc = (SetComponentInstanceStorageProc) dlsym(theImage, "SetComponentInstanceStorage");

}

#if TARGET_OS_MAC

#include <dispatch/dispatch.h>

static dispatch_once_t sCSInitOnce = 0;

static void CSInit ()

{

    dispatch_once_f(&sCSInitOnce, NULL, CSInitOnce);

}

#else 

static void CSInit ()

{

    static int sDoCSLoad = 1;

    if (sDoCSLoad) {

        sDoCSLoad = 0;

        CSInitOnce(NULL);

    }

}

#endif

OSStatus CMgr_GetComponentDescription (const AudioComponentInstance inInstance, AudioComponentDescription * outDesc)

{

    CSInit();

    if (sGetComponentInfoProc)

        return (*sGetComponentInfoProc)((Component)inInstance, (ComponentDescription*)outDesc, NULL, NULL, NULL);

    return kAudio_UnimplementedError;

}

Handle CMgr_GetComponentInstanceStorage(ComponentInstance aComponentInstance)

{

    CSInit();

    if (sGetComponentInstanceStorageProc)

        return (*sGetComponentInstanceStorageProc)(aComponentInstance);

    return NULL;

}

void CMgr_SetComponentInstanceStorage(ComponentInstance aComponentInstance, Handle theStorage)

{

    CSInit();

    if (sSetComponentInstanceStorageProc)

        (*sSetComponentInstanceStorageProc)(aComponentInstance, theStorage);

}

#endif // !CA_USE_AUDIO_PLUGIN_ONLY

#else

//#include "ComponentManagerDependenciesWin.h"

// everything we need is there and we should be linking against it

static OSStatus CB_GetComponentDescription (const AudioComponentInstance inInstance, AudioComponentDescription * outDesc)

{

    AudioComponent comp = AudioComponentInstanceGetComponent(inInstance);

    if (comp)

        return AudioComponentGetDescription(comp, outDesc);

    return kAudio_ParamError;

}

#endif