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/*=============================================================================
	QTAACFile.h
	
=============================================================================*/

#ifndef __QTAACFile_h__
#define __QTAACFile_h__

#include <QuickTime/QuickTime.h>
#include <AudioToolbox/AudioConverter.h>
#include <AudioToolbox/AudioFormat.h>
#include <vector>
#include "CAStreamBasicDescription.h"
#include "CAAudioChannelLayout.h"

/*
	This class is a stripped-down analogue to CAAudioFile, designed solely for reading AAC audio
	tracks from QuickTime/MP4 files.
	
	Throws CAXException's on errors.
*/
class QTAACFile {
public:
	QTAACFile();
	~QTAACFile();

	void		Open(const char *filePath);
	void		Close();

	void		SetClientFormat(const CAStreamBasicDescription &dataFormat);
					// set the PCM format to which the movie's audio will be decoded

	OSStatus	SetConverterProperty(		AudioConverterPropertyID	inPropertyID,
											UInt32						inPropertyDataSize,
											const void*					inPropertyData,
											bool						inCanFail);

	void		ReadPackets(UInt32 &ioNumPackets, AudioBufferList *ioData);
					// read packets from the audio file in the client format
					
private:
	void	CloseConverter();
	void	UpdateClientMaxPacketSize();

	static OSStatus ReadInputProc(		AudioConverterRef				inAudioConverter,
										UInt32*							ioNumberDataPackets,
										AudioBufferList*				ioData,
										AudioStreamPacketDescription**	outDataPacketDescription,
										void*							inUserData);	

private:
	typedef std::vector<TimeValue> TimeValueList;
	
	SInt16							mMovieResFile;
	Movie							mMovie;
	Media							mMedia;
	Handle							mPacketHandle;
	UInt32							mMagicCookieSize;
	char *							mMagicCookie;
	TimeValueList					mPacketTimes;
	UInt32							mNumberPackets;		// in file's format
	UInt32							mPacketMark;		// location in file, in file's format
		
	CAStreamBasicDescription		mFileDataFormat;
	CAStreamBasicDescription		mClientDataFormat;
	AudioConverterRef				mConverter;
	UInt32							mFileMaxPacketSize;
	UInt32							mClientMaxPacketSize;
	AudioStreamPacketDescription	mPacketDescription;
};

#endif // __QTAACFile_h__