utils.cpp

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*/

#if !defined(__COREAUDIO_USE_FLAT_INCLUDES__)
	#include <AudioToolbox/AudioToolbox.h>
#else
	#include "AudioToolbox.h"
	#include <stdlib.h>
	#include <QTML.h>
	#include "QTLicensedTech.h" // So we can access the AAC aenc
	#include "CAWindows.h"
#endif

#include "CAXException.h"
#include "CAStreamBasicDescription.h"

// external to this file the following function needs to be defined
int ConvertFile (CFURLRef					inputFileURL, 
				CAStreamBasicDescription	&inputFormat,
				CFURLRef					outputFileURL,
				AudioFileTypeID				outputFileType, 
				CAStreamBasicDescription	&outputFormat,
				UInt32                      outputBitRate);


void UsageString(int exitCode)
{
	printf ("Usage: ConvertFile /path/to/input/file [-d formatID] [-r sampleRate] [-bd bitDepth] [-f fileType] [-b bitrate] [-h]\n");
	printf ("    output file written is /tmp/outfile.<EXT FOR FORMAT>\n");
	printf ("    if -d is specified, out file is written with that format\n");
	printf ("       if no format is specified and input file is 'lpcm', IMA is written\n");
	printf ("       if input file is compressed (ie. not 'lpcm'), then 'lpcm' is written\n");
	printf ("    if -r is specified, input file's format must be ('lpcm') and output ('lpcm') is written with new sample rate\n");
	printf ("    if -bd is specified, input file's format must be compressed (ie. not 'lpcm') and output is written with new bit depth\n");
	printf ("    if -f is not specified, CAF File is written ('caff')\n");
	printf ("    if -b is specified, the bit rate for the output file when using a VBR encoder\n");
	printf ("    if -h is specified, will print out this usage message\n");
	exit(exitCode);
}

void str2OSType (const char * inString, OSType &outType)
{
	if (inString == NULL) {
		outType = 0;
		return;
	}
	
	size_t len = strlen(inString);
	if (len <= 4) {
		char workingString[5];
		
		workingString[4] = 0;
		workingString[0] = workingString[1] = workingString[2] = workingString[3] = ' ';
		memcpy (workingString, inString, strlen(inString));
		outType = 	*(workingString + 0) <<	24	|
					*(workingString + 1) <<	16	|
					*(workingString + 2) <<	8	|
					*(workingString + 3);
		return;
	}

	if (len <= 8) {
		int32_t tmp;
		if (sscanf (inString, "%x", &tmp) == 0) {
			printf ("* * Bad conversion for OSType\n"); 
			UsageString(1);
		}
		outType = tmp;
		
		return;
	}
	printf ("* * Bad conversion for OSType\n"); 
	UsageString(1);
}

void ParseArgs (int argc, char * const argv[], 
					AudioFileTypeID	&	outFormat, 
					Float64	&			outSampleRate,
					OSType	&			outFileType,
					CFURLRef&			outInputFileURL,
					CFURLRef&			outOutputFileURL,
					UInt32  &			outBitDepth,
					UInt32  &			outBitRate)
{
	if (argc < 2) {
		printf ("No Input File specified\n");
		UsageString(1);
	}
	
	// support "ConvertFile -h" usage
	if (argc == 2 && !strcmp("-h", argv[1])) {
		UsageString(0);
	}
	
	// first validate our initial condition
	const char* inputFileName = argv[1];
	
	outInputFileURL = CFURLCreateFromFileSystemRepresentation (kCFAllocatorDefault, (const UInt8 *)inputFileName, strlen(inputFileName), false);
	if (!outInputFileURL) {
		printf ("* * Bad input file path\n"); 
		UsageString(1);
    }
	
	outBitRate = 0;
	outBitDepth = 0;
	
	// look to see if a format or different file output has been specified
	for (int i = 2; i < argc; ++i) {
		if (!strcmp ("-d", argv[i])) {
			str2OSType (argv[++i], outFormat);
			outSampleRate = 0;
		}
		else if (!strcmp ("-r", argv[i])) {
			sscanf (argv[++i], "%lf", &outSampleRate);
			outFormat = 0;
		}
		else if (!strcmp("-bd", argv[i])) {
			int temp;
			sscanf (argv[++i], "%d", &temp);
			outBitDepth = temp;
		}
		else if (!strcmp ("-f", argv[i])) {
			str2OSType (argv[++i], outFileType);
		}
		else if (!strcmp ("-b", argv[i])) {
			int temp;
			sscanf (argv[++i], "%u", &temp);
			outBitRate = temp;
		}
		else if (!strcmp ("-h", argv[i])) {
			UsageString(0);
		}
		else {
			printf ("* * Unknown command: %s\n", argv[i]); 
			UsageString(1);
		}
	}
	
// output file
	UInt32 size = sizeof(CFArrayRef);
	CFArrayRef extensions;
	OSStatus err = AudioFileGetGlobalInfo(kAudioFileGlobalInfo_ExtensionsForType,
				sizeof(OSType), &outFileType,
                &size, &extensions);	
	XThrowIfError (err, "Getting the file extensions for file type");

	// just take the first extension
	CFStringRef ext = (CFStringRef)CFArrayGetValueAtIndex(extensions, 0);
	char extstr[32];
	Boolean res = CFStringGetCString(ext, extstr, 32, kCFStringEncodingUTF8);
	XThrowIfError (!res, "CFStringGetCString");
	
	// release the array as we're done with this now
	CFRelease (extensions);

	char outFname[256];
#if TARGET_OS_WIN32
	char drive[3], dir[256];
	_splitpath_s(inputFileName, drive, 3, dir, 256, NULL, 0, NULL, 0);
	_makepath_s(outFname, 256, drive, dir, "outfile", extstr);
#else
//	char outFname[64];
	sprintf (outFname, "/tmp/outfile.%s", extstr);
#endif
	outOutputFileURL = CFURLCreateFromFileSystemRepresentation (kCFAllocatorDefault, (const UInt8 *)outFname, strlen(outFname), false);
	if (!outOutputFileURL) {
		printf ("* * Bad output file path\n"); 
		UsageString(1);
    }
}

void	GetFormatFromInputFile (AudioFileID inputFile, CAStreamBasicDescription & inputFormat)
{
	bool doPrint = true;
	UInt32 size;
	XThrowIfError(AudioFileGetPropertyInfo(inputFile, 
								kAudioFilePropertyFormatList, &size, NULL), "couldn't get file's format list info");
	UInt32 numFormats = size / sizeof(AudioFormatListItem);
	AudioFormatListItem *formatList = new AudioFormatListItem [ numFormats ];

	XThrowIfError(AudioFileGetProperty(inputFile, 
								kAudioFilePropertyFormatList, &size, formatList), "couldn't get file's data format");
	numFormats = size / sizeof(AudioFormatListItem); // we need to reassess the actual number of formats when we get it
	if (numFormats == 1) {
			// this is the common case
		inputFormat = formatList[0].mASBD;
	} else {
		if (doPrint) {
			printf ("File has a %d layered data format:\n", (int)numFormats);
			for (unsigned int i = 0; i < numFormats; ++i)
				CAStreamBasicDescription(formatList[i].mASBD).Print();
			printf("\n");
		}
		// now we should look to see which decoders we have on the system
		XThrowIfError(AudioFormatGetPropertyInfo(kAudioFormatProperty_DecodeFormatIDs, 0, NULL, &size), "couldn't get decoder id's");
		UInt32 numDecoders = size / sizeof(OSType);
		OSType *decoderIDs = new OSType [ numDecoders ];
		XThrowIfError(AudioFormatGetProperty(kAudioFormatProperty_DecodeFormatIDs, 0, NULL, &size, decoderIDs), "couldn't get decoder id's");			
		unsigned int i = 0;
		for (; i < numFormats; ++i) {
			OSType decoderID = formatList[i].mASBD.mFormatID;
			bool found = false;
			for (unsigned int j = 0; j < numDecoders; ++j) {
				if (decoderID == decoderIDs[j]) {
					found = true;
					break;
				}
			}
			if (found) break;
		}
		delete [] decoderIDs;
		
		if (i >= numFormats) {
			fprintf (stderr, "Cannot play any of the formats in this file\n");
			throw kAudioFileUnsupportedDataFormatError;
		}
		inputFormat = formatList[i].mASBD;
	}
	delete [] formatList;
}


void	ConstructOutputFormatFromArgs (	CFURLRef inputFileURL, 
										OSType fileType, OSType format, Float64 sampleRate, 
										CAStreamBasicDescription &inputFormat, 
										UInt32 bitDepth, 
										CAStreamBasicDescription &outputFormat)
{
	AudioFileID infile;	
	OSStatus err = AudioFileOpenURL(inputFileURL, kAudioFileReadPermission, 0, &infile);
	XThrowIfError (err, "AudioFileOpen");
	
// get the input file format
	GetFormatFromInputFile (infile, inputFormat);

	if (inputFormat.mFormatID != kAudioFormatLinearPCM && sampleRate > 0) {
		printf ("Can only specify sample rate with linear pcm input file\n");
		UsageString(1);
	}
	
// set up the output file format
	if (!format) {
		if (sampleRate > 0) {
			outputFormat = inputFormat;
			outputFormat.mSampleRate = sampleRate;
		} else {
			if (inputFormat.mFormatID != kAudioFormatLinearPCM)
				format = kAudioFormatLinearPCM;
			else
				format = kAudioFormatAppleIMA4;
		}
	}
		
	if (format) {
		if (format == kAudioFormatLinearPCM) {
			outputFormat.mFormatID = format;
			outputFormat.mSampleRate = inputFormat.mSampleRate;
			outputFormat.mChannelsPerFrame = inputFormat.mChannelsPerFrame;
			outputFormat.mBitsPerChannel = (bitDepth) ? bitDepth : 16;

			outputFormat.mBytesPerPacket = inputFormat.mChannelsPerFrame * (outputFormat.mBitsPerChannel / 8);
			outputFormat.mFramesPerPacket = 1;
			outputFormat.mBytesPerFrame = outputFormat.mBytesPerPacket;
	
			if (fileType == kAudioFileWAVEType)
				outputFormat.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger
								| kLinearPCMFormatFlagIsPacked;
			else
				outputFormat.mFormatFlags = kLinearPCMFormatFlagIsBigEndian
									| kLinearPCMFormatFlagIsSignedInteger
									| kLinearPCMFormatFlagIsPacked;
			
		
		} else {
			// need to set at least these fields for kAudioFormatProperty_FormatInfo
			outputFormat.mFormatID = format;
			outputFormat.mSampleRate = inputFormat.mSampleRate;
			outputFormat.mChannelsPerFrame = inputFormat.mChannelsPerFrame;
			
		// use AudioFormat API to fill out the rest.
			UInt32 size = sizeof(outputFormat);
			err = AudioFormatGetProperty(kAudioFormatProperty_FormatInfo, 0, NULL, &size, &outputFormat);
            XThrowIfError (err, "AudioFormatGetProperty kAudioFormatProperty_FormatInfo");
		}
	}
	AudioFileClose (infile);
}

int main (int argc, char * const argv[]) 
{
#if TARGET_OS_WIN32
  	QTLicenseRef aacEncoderLicenseRef = nil;
  	QTLicenseRef amrEncoderLicenseRef = nil;
	OSErr localerr;
#endif
	int result = 0;
	CFURLRef inputFileURL = NULL;
	CFURLRef outputFileURL = NULL;

#if TARGET_OS_WIN32
	InitializeQTML(0L);
	{
		OSErr localerr;
		const char *licenseDesc = "AAC Encode License Verification";
		const char *amrLicenseDesc = "AMR Encode License Verification";

		localerr = QTRequestLicensedTechnology("com.apple.quicktimeplayer","com.apple.aacencoder",
					(void *)licenseDesc,strlen(licenseDesc),&aacEncoderLicenseRef);
		localerr = QTRequestLicensedTechnology("com.apple.quicktimeplayer","1D07EB75-3D5E-4DA6-B749-D497C92B06D8",
					(void *)amrLicenseDesc,strlen(amrLicenseDesc),&amrEncoderLicenseRef);
	}
#endif
	
	try {
		OSType format = 0;
		Float64 sampleRate = 0;
		AudioFileTypeID outputFileType = kAudioFileCAFType;
 	  	UInt32 outputBitRate = 0;
		UInt32 outputBitDepth = 0;
		
		ParseArgs (argc, argv, format, sampleRate, outputFileType, inputFileURL, outputFileURL, outputBitDepth, outputBitRate);

	//	printf ("args:%4.4s, sample rate:%.1f, outputFileType: %4.4s\n", (char*)&format, sampleRate, (char*)&outputFileType);

		CAStreamBasicDescription inputFormat;	
		CAStreamBasicDescription outputFormat;	
		ConstructOutputFormatFromArgs (inputFileURL, outputFileType, format, sampleRate, inputFormat, outputBitDepth, outputFormat);
		
		printf ("Source File format:\n\t"); inputFormat.Print();
		printf ("Dest File format:\n\t"); outputFormat.Print();
		
		result = ConvertFile (inputFileURL, inputFormat, outputFileURL, outputFileType, outputFormat, outputBitRate);

		CFStringRef path = CFURLCopyPath(outputFileURL);
		printf("done: "); fflush(stdout); CFShow(path);
		if (path) CFRelease(path);

	} catch (CAXException e) {
		char buf[256];
		fprintf(stderr, "Error in: %s\nException thrown: %s\n", e.mOperation, e.FormatError(buf));
		result = 1;
	} catch (...) {
		fprintf(stderr, "Unspecified exception\n");
		result = 1;
	}
	if (inputFileURL) CFRelease(inputFileURL);
	if (outputFileURL) CFRelease(outputFileURL);
	
#if TARGET_OS_WIN32
	TerminateQTML();
 	if (aacEncoderLicenseRef)
	{
		localerr = QTReleaseLicensedTechnology(aacEncoderLicenseRef);
		aacEncoderLicenseRef = nil;
	}
	if(amrEncoderLicenseRef)
	{
		localerr = QTReleaseLicensedTechnology(amrEncoderLicenseRef);
		amrEncoderLicenseRef = nil;
	}
#endif	
	return result;
}