www.pudn.com > flash.rar > adpcm.h

#ifndef _ADPCM_H_ 
#define _ADPCM_H_ 
 
class Adpcm { 
 
	// Destination format - note we always decompress to 16 bit 
	long		 stereo; 
	int		 nBits;  // number of bits in each sample 
 
	long		 valpred[2]; // Current state 
	int		 index[2]; 
 
	long 		 nSamples; // number of samples decompressed so far 
 
	// Parsing Info 
	unsigned char 	*src; 
	long		 bitBuf; // this should always contain at least 24 bits of data 
	int		 bitPos; 
 
	void FillBuffer(); 
 
	long GetBits(int n); 
 
	long GetSBits(int n); 
 
public: 
	Adpcm(unsigned char *buffer, long isStereo); 
 
	void Decompress(short * dst, long n); // return number of good samples 
#ifdef DUMP 
	void dump(BitStream *bs); 
	void Compress(short *pcm, long n, int bits); 
#endif 
}; 
 
#endif /* _ADPCM_H_ */