OPIE: core/applets/vmemo/adpcm.h Source File

00001 /*
00002 ** adpcm.h - include file for adpcm coder.
00003 **
00004 ** Version 1.0, 7-Jul-92.
00005 */
00006 
00007 struct adpcm_state {
00008     short       valprev;        /* Previous output value */
00009     char        index;          /* Index into stepsize table */
00010 };
00011 
00012 #ifdef __STDC__
00013 #define ARGS(x) x
00014 #else
00015 #define ARGS(x) ()
00016 #endif
00017 
00018 void adpcm_coder ARGS((short [], char [], int, struct adpcm_state *));
00019 void adpcm_decoder ARGS((char [], short [], int, struct adpcm_state *));