adpcm.h

s1d13716的源码 windiws ce 或8位单片机

/*
 * adpcm.h
 *  
 * Ver0.10 98/ 7/22 H.Matsuoka  Start
 * Ver0.11 98/ 7/31 H.Matsuoka  Change #define ADPCM_XX. same VSX
 * Ver0.20 98/10/30 T.Ichikawa  Add #ifdef MSVC to share source toola and 
 *                              library.
 * Ver0.30 98/11/13 T.Ichikawa  Moved ADPCM_FILE_ID from voxlib.h
 * Ver0.31 99/ 2/17 H.Matsuoka  Del Japanese comment
 *                              Rename adpcm_sample_cnt adpcm_code_size
 *
 */



#ifndef ADPCM_H
#define ADPCM_H

#define ADPCM_16K   (1)
#define ADPCM_24K   (2)
#define ADPCM_32K   (4)
#define ADPCM_40K   (8)


/*
 *  ADPCM data format
 * 
 *  <------- ADPCM_HEADER_SIZE -------->
 *  +-------+------+------+------+        +------------+
 *  |FILE_ID|size  |offset|format|        |ADPCM   code|
 *  +-------+------+------+------+        +------------+
 *    1byte  4      4      1      <------> 
 *                                       offset  
 *                                       (byte)  
 */


/* Moved this line from voxlib.h - 1998.Nov.13 T.Ichikawa */
#define ADPCM_FILE_ID     (0x41)
#define ADPCM_HEADER_SIZE (10)

typedef struct
{
    long          adpcm_code_size;    /* size of adpcm code (bytes) */
    long          adpcm_code_offset;  /* offset of adpcm code */
    unsigned char adpcm_format;       /* adpcm compress mode */
} adpcmParams;


#ifndef MSVC
int adpcmDecode(unsigned char*, short *);
int adpcmEncode(short*, int, unsigned char*);
int adpcmWriteHeader(adpcmParams*, int, unsigned char*);
int adpcmReadHeader(unsigned char*, adpcmParams*);
int adpcmInit(adpcmParams*, int);
#endif /* MSVC */
#endif  /* ADPCM_H */