/*
     File: AUBaseHelper.cpp 
 Abstract:  AUBaseHelper.h  
  Version: 1.01 
  
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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;
}

// write valid samples check, with bool for zapping

UInt32 FindInvalidSamples(Float32 *inSource, UInt32 inFramesToProcess, bool &outHasNonZero, bool zapInvalidSamples)
{
	float *sourceP = inSource;
	
	UInt32 badSamplesDetected = 0;
	for (UInt32 i=0; i < inFramesToProcess; i++)
	{
		float  input = *sourceP;
		
		if(input > 0) 
			outHasNonZero = true;

		float absx = fabs(input);
		
		// a bad number!
		if (!(absx < 1e15))
		{
			if (!(absx == 0))
			{
				//printf("\tbad sample: %f\n", input);
				badSamplesDetected++;
				if (zapInvalidSamples)
					*sourceP = 0;
			}
		}
        sourceP++;
	}
	
	return badSamplesDetected;
}


CFMutableDictionaryRef CreateFileRefDict (CFStringRef fKey, CFStringRef fPath, CFMutableDictionaryRef fileRefDict)
{
	if (!fileRefDict)
		fileRefDict = CFDictionaryCreateMutable	(NULL, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);

	CFDictionarySetValue (fileRefDict, fKey, fPath);
	
	return fileRefDict;
}

#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

