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adpcm.h

/*
** adpcm.h - include file for adpcm coder.
**
** Version 1.0, 7-Jul-92.
*/

struct adpcm_state {
    short valprev;            /* Previous output value */
    unsigned char index;      /* Index into stepsize table */
    unsigned char pad;
};

void adpcm_coder(const unsigned char*, unsigned char*, int, struct adpcm_state *);
void adpcm_decoder(const unsigned char*, unsigned char*, int, struct adpcm_state *);

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