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/*=============================================================================
	auprofile.cpp
	
=============================================================================*/

/*
	auprofile
		- takes a source audio file, an AU and processes this for performance metrics
*/

#include "CAAUProcessor.h"
#include "CAAudioFile.h"
#include "CAXException.h"
#include "CAHostTimeBase.h"
#include "CAFilePathUtils.h"
#include "CAAudioFileFormats.h"

#if TARGET_OS_MAC
	#include <pthread.h>
	#include <mach/mach.h>
#endif

#if DEBUG
	#define VERBOSE 0
#endif

UInt64 sLastReadTime = 0;
Float64 sMinTime = 9999999999.; // too big a time!
Float64 sMaxTime = 0;

#pragma mark __print helpers

void PerfResult(const char *toolname, int group, const char *testname, double value, const char *units, const char *fmt="%.3f")
{
	printf("<result tool='%s' group='%d' test='%s' value='", toolname, group, testname);
	printf(fmt, value);
	printf("' units='%s' />\n", units);
}

#pragma mark __Inpput Callback Definitions


// the file is read into memory - the input's role is to parse through this memory

struct ReadBuffer {
	AUOutputBL *readData;
	UInt64 totalInputFrames;
	UInt32 lastInputFrames;
};

const int kEndOfInput = 12345;

static OSStatus MemoryInputCallback (void		*inRefCon, 
					AudioUnitRenderActionFlags 	*ioActionFlags, 
					const AudioTimeStamp 		*inTimeStamp, 
					UInt32 						inBusNumber, 
					UInt32 						inNumberFrames, 
					AudioBufferList 			*ioData)
{
														UInt64 now = CAHostTimeBase::GetTheCurrentTime(); 
	OSStatus result = 0;
	
	ReadBuffer *readBuffer = (ReadBuffer*)inRefCon;
	if (inTimeStamp->mSampleTime >= readBuffer->totalInputFrames) {
			#if VERBOSE
				printf ("reading: %.0f past input: %.0f\n", inTimeStamp->mSampleTime, 
							(double)readBuffer->totalInputFrames); 
			#endif
		result = kEndOfInput;
		readBuffer->lastInputFrames = 0;
		goto end;
	}
		
		// can get pulled multiple times
	readBuffer->lastInputFrames += inNumberFrames;

	if (UInt64(inTimeStamp->mSampleTime + inNumberFrames) > readBuffer->totalInputFrames) {
		// first set this to zero as we're only going to read a partial number of frames
		AudioBuffer *buf = ioData->mBuffers;
		for (UInt32 i = ioData->mNumberBuffers; i--; ++buf)
			memset((Byte *)buf->mData, 0, buf->mDataByteSize);

		inNumberFrames = UInt32 (readBuffer->totalInputFrames - UInt64(inTimeStamp->mSampleTime));
	}
	
		// copy data from the source to the ioData buffers
	{
		AudioBuffer *buf = ioData->mBuffers;
		AudioBuffer *rBuf = readBuffer->readData->ABL()->mBuffers;
		for (UInt32 i = ioData->mNumberBuffers; i--; ++buf, ++rBuf) {
			AudioBuffer readB = *rBuf;
			readB.mData = static_cast<Float32*>(rBuf->mData) + UInt32(inTimeStamp->mSampleTime);
			memcpy (buf->mData, readB.mData, (inNumberFrames * sizeof(Float32)));
		}
	}
	
end:	
														sLastReadTime += (CAHostTimeBase::GetTheCurrentTime() - now); 

	return result;
}

#pragma mark __Utility Helpers

CFPropertyListRef	 ReadPresetFromPresetFile (char* filePath)
{	
	if (!filePath)
		return NULL;
	
	FSRef ref;
	if (FSPathMakeRef((UInt8 *)filePath, &ref, NULL))
		return NULL;
		
	CFDataRef			resourceData = NULL;
	CFPropertyListRef   theData = NULL;
	CFStringRef			errString = NULL;
	CFURLRef			fileURL = CFURLCreateFromFSRef (kCFAllocatorDefault, &ref);
		if (fileURL == NULL) {
			goto home;
		}
		
	SInt32				result;
    
   // Read the XML file.
   Boolean status; status = CFURLCreateDataAndPropertiesFromResource (kCFAllocatorDefault, fileURL,
                                                                &resourceData,	// place to put file data
                                                                NULL, NULL, &result);
        if (status == false || result) {
            goto home;
        }
    
	theData = CFPropertyListCreateFromXMLData (kCFAllocatorDefault, resourceData,  
													kCFPropertyListImmutable, &errString);
        if (theData == NULL || errString) {
            if (theData)
				CFRelease (theData);
			theData = NULL;
			goto home;
       }
	
home:
	if (fileURL)
		CFRelease (fileURL);
	if (resourceData)
		CFRelease (resourceData);
    if (errString)
		CFRelease (errString);
		
	return theData;
}

#pragma mark __the setup code

#define OFFLINE_AU_CMD 		"[-au TYPE SUBTYPE MANU] The Audio Unit component description\n\t"
#define INPUT_FILE	 		"[-i /Path/To/File] The file that is to be processed.\n\t"
#define AU_PRESET_CMD		"[-p /Path/To/AUPreset/File] Specify an AU Preset File to establish the state of the AU\n\t"
#define USE_MAX_FRAMES		"[-f max_frames] default is 4096"
 
static char* usageStr = "Usage: auprofile\n\t" 
				OFFLINE_AU_CMD 
				INPUT_FILE
				AU_PRESET_CMD
				USE_MAX_FRAMES;

int main(int argc, const char * argv[])
{
#if TARGET_OS_MAC
	{
		thread_extended_policy_data_t		theFixedPolicy;
		theFixedPolicy.timeshare = false;	// set to true for a non-fixed thread
		thread_policy_set(pthread_mach_thread_np(pthread_self()), 
													THREAD_EXTENDED_POLICY, 
													(thread_policy_t)&theFixedPolicy, 
													THREAD_EXTENDED_POLICY_COUNT);

		// We keep a reference to the spawning thread's priority around (initialized in the constructor), 
		// and set the importance of the child thread relative to the spawning thread's priority.
		thread_precedence_policy_data_t		thePrecedencePolicy;
		
		thePrecedencePolicy.importance = 63 - 36;
		thread_policy_set(pthread_mach_thread_np(pthread_self()), 
													THREAD_PRECEDENCE_POLICY, 
													(thread_policy_t)&thePrecedencePolicy, 
													THREAD_PRECEDENCE_POLICY_COUNT);
	}
#endif


// These are the variables that are set up from the input parsing
	char* srcFilePath = NULL;
	char* auPresetFile = NULL;
	OSType manu, subType, type = 0;
	UInt32 numFrames = 4096;
	
	for (int i = 1; i < argc; ++i)
	{
		if (strcmp (argv[i], "-au") == 0) {
            if ( (i + 3) < argc ) {                
                StrToOSType (argv[i + 1], type);
                StrToOSType (argv[i + 2], subType);
                StrToOSType (argv[i + 3], manu);
				i += 3;
			} else {
				printf ("Which Audio Unit:\n%s", usageStr);
				exit(1);
			}
		}
		else if (strcmp (argv[i], "-i") == 0) {
			srcFilePath = const_cast<char*>(argv[++i]);
		}
		else if (strcmp (argv[i], "-p") == 0) {
			auPresetFile = const_cast<char*>(argv[++i]);
		}
		else if (strcmp (argv[i], "-f") == 0) {
			sscanf(argv[++i], "%ld", &numFrames);
		}
		else {
			printf ("%s\n", usageStr);
			exit(1);
		}
	}
	
	if (!type || !srcFilePath) {
		printf ("%s\n", usageStr);
		exit(1);
	}
	
	CAComponentDescription desc(type, subType, manu);
	
	CFPropertyListRef presetDict = ReadPresetFromPresetFile(auPresetFile);
	
#pragma mark -
#pragma mark __ The driving code
#pragma mark -

	try 
	{
		CAComponent comp(desc);
			
			 // CAAUProcessor's constructor throws... so make sure the component is valid
		if (comp.IsValid() == false) {
			printf ("Can't Find Component\n");
			desc.Print();
			exit(1);
		}
			
		CAAUProcessor processor(comp);
										processor.AU().Comp().Print();
		
		CAAudioFile srcFile;
		
		srcFile.Open(srcFilePath);

#if !CAAF_USE_EXTAUDIOFILE
		UInt64 numInputSamples = srcFile.GetNumberPackets();
#else
		UInt64 numInputSamples = srcFile.GetNumberFrames();
#endif
		
		Float64 inputSecs = (numInputSamples / srcFile.GetFileDataFormat().mSampleRate);
		
		CAStreamBasicDescription procFormat (srcFile.GetFileDataFormat());
		procFormat.SetCanonical (srcFile.GetFileDataFormat().NumberChannels(), false);

										printf ("Processing file: %s, %.1f secs [proc: %ld frames]\n", srcFilePath, inputSecs, numFrames);
										#if VERBOSE
											printf("\t");
											procFormat.Print();
										#endif
		
		srcFile.SetClientFormat (procFormat);
		
		AUOutputBL outputList(procFormat);
	
		// read the entire file into memory
		ReadBuffer* readBuf = new ReadBuffer;
		readBuf->readData = new AUOutputBL(procFormat);
		readBuf->totalInputFrames = numInputSamples;
		readBuf->readData->Allocate (numInputSamples);
		readBuf->readData->Prepare();
		UInt32 readSamps = (UInt32)numInputSamples;
		srcFile.Read (readSamps, readBuf->readData->ABL());
			
		AURenderCallbackStruct inputCallback;
		inputCallback.inputProc = MemoryInputCallback;
		inputCallback.inputProcRefCon = readBuf;
				
		OSStatus result;
		require_noerr (result = processor.EstablishInputCallback (inputCallback), home);
		require_noerr (result = processor.SetMaxFramesPerRender (numFrames), home); 
		require_noerr (result = processor.Initialize (procFormat, numInputSamples), home);
		if (presetDict) {
			require_noerr (result = processor.SetAUPreset (presetDict), home);
			CFRelease (presetDict);
		}
			// this does ALL of the preflighting.. could be specialise for an OfflineAU type
			// to do this piecemeal and do a progress bar by using the OfflineAUPreflight method
		readBuf->lastInputFrames = 0;
		require_noerr (result = processor.Preflight (), home);
	
	float mean;
	
	// now do the processing....
	{
		const int kThrasherSize = 4000000;
		char* thrasher = new char[kThrasherSize];
		
		bool isDone = false;
		
		UInt32 numMeasures = 0;
		Float64 totalMSqrd;
		Float64 totalM;
		
		int i = 0;
		int discardResults = 3;
						
			// this is the render loop
		while (!isDone) 
		{
			bool isSilence, postProcess;

			outputList.Prepare(); // have to do this every time...
			readBuf->lastInputFrames = 0;
			sLastReadTime = 0;
			memset (thrasher, numMeasures, kThrasherSize);

												UInt64 now = CAHostTimeBase::GetTheCurrentTime(); 
			require_noerr (result = processor.Render (outputList.ABL(), numFrames, isSilence, &isDone, &postProcess), home);
												UInt64 renderTime = (CAHostTimeBase::GetTheCurrentTime() - now);
			
			if (i++ < discardResults) continue;
			if (!readBuf->lastInputFrames) break;

			Float64 renderTimeSecs = CAHostTimeBase::ConvertToNanos (renderTime - sLastReadTime) / 1.0e9;
			
			Float64 cpuTime = (renderTimeSecs / (readBuf->lastInputFrames / procFormat.mSampleRate)) * 100.;
			numMeasures++;
			
			totalMSqrd += (cpuTime * cpuTime);
			totalM += cpuTime;

			if (cpuTime > sMaxTime)
				sMaxTime = cpuTime;
			if (cpuTime < sMinTime)
				sMinTime = cpuTime;
									
#if VERBOSE
//			printf ("current measure: %.2f\n", cpuTime);
			if (numMeasures % 5 == 0) {
				Float64 mean = totalM / numMeasures;				
					//	stdDev = (sum of Xsquared -((sum of X)*(sum of X)/N)) / (N-1))
				Float64 stdDev = sqrt ((totalMSqrd - ((totalM * totalM) / numMeasures)) / (numMeasures-1.0));
				printf ("ave: %.2f, min: %.2f, max: %.2f, stdev: %.2f, numMeasures: %ld, current: %f\n", 
					mean, sMinTime, sMaxTime, stdDev, numMeasures, cpuTime);
			}
#endif
		}
		delete [] thrasher;
		
		mean = totalM / numMeasures;
			//	stdDev = (sum of Xsquared -((sum of X)*(sum of X)/N)) / (N-1))
		Float64 stdDev = sqrt ((totalMSqrd - ((totalM * totalM) / numMeasures)) / (numMeasures-1.0));

		printf ("ave: %.2f, min: %.2f, max: %.2f, sd: %.2f, sd / mean: %.2f%%\n", 
			mean, sMinTime, sMaxTime, stdDev, (stdDev / mean * 100.));
	}

		// we don't care about post-processing

home:
		if (result) {
			printf ("Exit with bad result:%ld\n", result);
			exit(result);
		}
		
		if (readBuf) {
			delete readBuf->readData;
			delete readBuf;
		}
		

		CFStringRef str = comp.GetCompName();
		UInt32 compNameLen = CFStringGetLength (str);
		
		CFStringRef presetName = NULL;
		if (auPresetFile) {
			CFPropertyListRef dict;
			if (processor.AU().GetAUPreset (dict) == noErr) {
				presetName = (CFStringRef)CFDictionaryGetValue((CFDictionaryRef)dict, CFSTR("name"));
				CFRelease (dict);
			}
		}

		UInt32 presetLen = presetName ? CFStringGetLength(presetName) : 0;
		
		UInt32 groupID = comp.Desc().componentSubType;
		
		char* cstr = (char*)malloc (compNameLen + presetLen + 2 + 1);
		CFStringGetCString (str, cstr, (CFStringGetLength (str) + 1), kCFStringEncodingASCII);
		if (presetName) {
			cstr[compNameLen] = ':';
			cstr[compNameLen+1] = ':';
			CFStringGetCString (presetName, cstr + compNameLen + 2, (CFStringGetLength (presetName) + 1), kCFStringEncodingASCII);
			int len = strlen(cstr);
			for (int i = 0; i < len; ++i)
				groupID += cstr[i];
		}
		PerfResult("AU Profile", EndianU32_NtoB(groupID), cstr, mean, "%realtime");
		free (cstr);

	}
	catch (CAXException &e) {
		char buf[256];
		printf("Error: %s (%s)\n", e.mOperation, e.FormatError(buf));
		exit(1);
	}
	catch (...) {
		printf("An unknown error occurred\n");
		exit(1);
	}
			
	return 0;
}