CAComponent.cpp

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#include "CAComponent.h"
#include "CAComponentDescription.h"
#include "CACFDictionary.h"
#include <stdlib.h>
#include "CAAutoDisposer.h"

CAComponent::CAComponent (const AudioComponentDescription& inDesc, CAComponent* next)
    : mManuName(0), mAUName(0), mCompName(0)
{
    mComp = AudioComponentFindNext ((next ? next->Comp() : NULL), &inDesc);
    if (mComp)
        AudioComponentGetDescription(Comp(), &mDesc);
    else
        memcpy (&mDesc, &inDesc, sizeof(AudioComponentDescription));
}

CAComponent::CAComponent (const AudioComponent& comp) 
    : mComp (comp),
      mManuName(0), 
      mAUName(0), 
      mCompName(0)
{
    AudioComponentGetDescription (Comp(), &mDesc);
}

CAComponent::CAComponent (const AudioComponentInstance& compInst) 
    : mComp (NULL), 
      mManuName(0), 
      mAUName(0), 
      mCompName(0)
{ 
    mComp = AudioComponentInstanceGetComponent (compInst);
    AudioComponentGetDescription (Comp(), &mDesc);
}

CAComponent::CAComponent (OSType inType, OSType inSubtype, OSType inManu)
    : mDesc (inType, inSubtype, inManu),
      mManuName(0), mAUName(0), mCompName(0)
{
    mComp = AudioComponentFindNext (NULL, &mDesc);
    AudioComponentGetDescription (Comp(), &mDesc);
}

CAComponent::~CAComponent ()
{
    Clear();
}

OSStatus        CAComponent::GetVersion (UInt32 &outVersion) const
{
    return AudioComponentGetVersion (mComp, &outVersion);
}

void            CAComponent::Clear ()
{
    if (mManuName) { CFRelease (mManuName); mManuName = 0; }
    if (mAUName) { CFRelease (mAUName);  mAUName = 0; }
    if (mCompName) { CFRelease (mCompName); mCompName = 0; }
}

CAComponent&    CAComponent::operator= (const CAComponent& y)
{
    Clear();

    mComp = y.mComp;
    mDesc = y.mDesc;

    if (y.mManuName) { mManuName = y.mManuName; CFRetain (mManuName); }
    if (y.mAUName) { mAUName = y.mAUName; CFRetain (mAUName); }
    if (y.mCompName) { mCompName = y.mCompName; CFRetain (mCompName); } 

    return *this;
}

void        CAComponent::SetCompNames () const
{
    if (!mCompName) {
    
        CFStringRef compName;
        OSStatus result = AudioComponentCopyName (Comp(), &compName);
        if (result) return;
        
        const_cast<CAComponent*>(this)->mCompName = compName;
        if (compName)
        {
            CFArrayRef splitStrArray = CFStringCreateArrayBySeparatingStrings(NULL, compName, CFSTR(":"));
            
            // we need to retain these values so the strings are not lost when the array is released
            CFRetain(CFArrayGetValueAtIndex(splitStrArray, 0));
            const_cast<CAComponent*>(this)->mManuName = (CFStringRef)CFArrayGetValueAtIndex(splitStrArray, 0);
            if (CFArrayGetCount(splitStrArray) > 1)
            {
                CFStringRef str = (CFStringRef)CFArrayGetValueAtIndex(splitStrArray, 1);
                
                CFMutableStringRef mstr = CFStringCreateMutableCopy (NULL, CFStringGetLength(str), str);

                // this needs to trim out white space:
                
                CFStringTrimWhitespace (mstr);
            
                const_cast<CAComponent*>(this)->mAUName = mstr;
            } else
                const_cast<CAComponent*>(this)->mAUName = NULL;
            
            CFRelease(splitStrArray);
        }
    }
}

static void _ShowCF (FILE* file, CFStringRef str)
{
    if (CFGetTypeID(str) != CFStringGetTypeID()) {
        CFShow(str);
        return;
    }

    UInt32 len = CFStringGetLength(str);
    char* chars = (char*)CA_malloc (len * 2); // give us plenty of room for unichar chars
    if (CFStringGetCString (str, chars, len * 2, kCFStringEncodingUTF8))
        fprintf (file, "%s", chars);
    else
        CFShow (str);

    free (chars);
}

void    CAComponent::Print(FILE* file) const
{
    fprintf (file, "CAComponent: %p", Comp());
    if (mManuName) {
        fprintf (file, ", Manu:"); _ShowCF (file, mManuName);
        if (mAUName) fprintf (file, ", Name:"); _ShowCF (file, mAUName);
    }
    fprintf (file, ", "); 
    Desc ().Print(file);
}