/*

     File: AUBaseHelper.cpp

 Abstract: AUBaseHelper.h

  Version: 1.0.1

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 Neither the name, trademarks, service marks or logos of Apple Inc. may

 be used to endorse or promote products derived from the Apple Software

 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

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*/

#include "AUBaseHelper.h"

#if !defined(__COREAUDIO_USE_FLAT_INCLUDES__)

    #include <AudioUnit/AudioUnitProperties.h>

#else

    #include <AudioUnitProperties.h>

#endif

OSStatus    GetFileRefPath (CFDictionaryRef parent, CFStringRef frKey, CFStringRef * fPath)

{   

    static CFStringRef kFRString = CFSTR (kAUPresetExternalFileRefs);

    const void* frVal = CFDictionaryGetValue(parent, kFRString);

    if (!frVal) return kAudioUnitErr_InvalidPropertyValue;

    const void* frString = CFDictionaryGetValue ((CFDictionaryRef)frVal, frKey);

    if (!frString) return kAudioUnitErr_InvalidPropertyValue;

    if (fPath)

        *fPath = (CFStringRef)frString;

    return noErr;

}

CFMutableDictionaryRef CreateFileRefDict (CFStringRef fKey, CFStringRef fPath, CFMutableDictionaryRef fileRefDict)

{

    if (!fileRefDict)

        fileRefDict = CFDictionaryCreateMutable (NULL, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);

    CFDictionarySetValue (fileRefDict, fKey, fPath);

    return fileRefDict;

}

#if TARGET_OS_MAC

// check if the URL can be accessed for reading/writing.  Returns 0 if yes, or the error value.

int AccessURLAsset(const CFURLRef inURL, int mode)

{

    char path[PATH_MAX];

    if (CFURLGetFileSystemRepresentation(inURL, TRUE, (UInt8 *)path, PATH_MAX) == FALSE)

        return kAudio_FileNotFoundError;

    // check whether we have access

    int ret = access(path, mode);

//  syslog(LOG_CRIT, "access() error is %d for \"%s\".\n", ret, path);

    if (ret == 0) return 0;

    switch (errno) {

        case EACCES:

        case EPERM:

            return -54; /*permission denied error*/

        case ENOENT:

        case ENOTDIR:

        case ELOOP:

            return kAudio_FileNotFoundError;

        default:

            return errno;

    }

}

#endif

#if DEBUG

//_____________________________________________________________________________

//

void PrintAUParamEvent (AudioUnitParameterEvent& event, FILE* f)

{

        bool isRamp = event.eventType == kParameterEvent_Ramped;

        fprintf (f, "\tParamID=%ld,Scope=%ld,Element=%ld\n", (long)event.parameter, (long)event.scope, (long)event.element);

        fprintf (f, "\tEvent Type:%s,", (isRamp ? "ramp" : "immediate"));

        if (isRamp)

            fprintf (f, "start=%ld,dur=%ld,startValue=%f,endValue=%f\n",

                    (long)event.eventValues.ramp.startBufferOffset, (long)event.eventValues.ramp.durationInFrames, 

                    event.eventValues.ramp.startValue, event.eventValues.ramp.endValue);

        else

            fprintf (f, "start=%ld,value=%f\n", 

                    (long)event.eventValues.immediate.bufferOffset, 

                    event.eventValues.immediate.value);

        fprintf (f, "- - - - - - - - - - - - - - - -\n");

}

#endif