packing.h

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 /******************************************************************

 iLBC Speech Coder ANSI-C Source Code

 packing.h

 Copyright (C) The Internet Society (2004).
 All Rights Reserved.

 ******************************************************************/

 #ifndef __PACKING_H
 #define __PACKING_H

 void packsplit(
 int *index, /* (i) the value to split */
 int *firstpart, /* (o) the value specified by most
 significant bits */
 int *rest, /* (o) the value specified by least
 significant bits */
 int bitno_firstpart, /* (i) number of bits in most
 significant part */
 int bitno_total /* (i) number of bits in full range
 of value */
 );

 void packcombine(
 int *index, /* (i/o) the msb value in the
 combined value out */
 int rest, /* (i) the lsb value */
 int bitno_rest /* (i) the number of bits in the
 lsb part */
 );

 void dopack(
 unsigned char **bitstream, /* (i/o) on entrance pointer to
 place in bitstream to pack
 new data, on exit pointer
 to place in bitstream to
 pack future data */
 int index, /* (i) the value to pack */
 int bitno, /* (i) the number of bits that the
 value will fit within */
 int *pos /* (i/o) write position in the
 current byte */
 );





 void unpack(
 unsigned char **bitstream, /* (i/o) on entrance pointer to
 place in bitstream to
 unpack new data from, on
 exit pointer to place in
 bitstream to unpack future
 data from */
 int *index, /* (o) resulting value */
 int bitno, /* (i) number of bits used to
 represent the value */
 int *pos /* (i/o) read position in the
 current byte */
 );

 #endif