cbufferfile.h

linux下的一款播放器

/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: cbufferfile.h,v 1.1.1.1.50.3 2004/07/09 01:44:30 hubbe Exp $
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#pragma once

enum
{
	kBufLow = 0,
	kBufHigh,
	kBoth
};

#ifndef __CBUFFERFILE_DEFAULTBUFFER	
#define __CBUFFERFILE_DEFAULTBUFFER 65534 ///32767
#endif

class CBufferFile
{
	
public:

				CBufferFile		(void);  
	virtual		~CBufferFile	();

	Boolean 	PreLoad(long startPos, long bytesReq);
	virtual     long  Copy(Ptr destBuf, long numBytes);
	void	 	CheckBuffer(void);
	Boolean		Specify(short fRefNum, long bufSize = __CBUFFERFILE_DEFAULTBUFFER);
	long 		Load(short loadFlag);
	Boolean 	Loaded(void) {return mLoaded;};

	
protected:
	

	Ptr			mLow;
	Ptr			mHigh;
	long		mCurPos;
	long		mSize;
	long		mBufSize;
	
	long		mStartPos;
	long		ioPosOffset;
	long		mBytesTotal;
	long		mBytesRemaining;
	long		mBytesToCopy;
	
	Boolean		fFillLow;
	Boolean		mLoaded;
	
	IOParam 	a_PB;			// pointer to PB file i/o struct  
	IOParam 	b_PB;			// PB file i/o struct for looping


};