60 lines
2.9 KiB
C
60 lines
2.9 KiB
C
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/*
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* iLBC - a library for the iLBC codec
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*
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* packing.h - The iLBC low bit rate speech codec.
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*
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* Adapted by Steve Underwood <steveu@coppice.org> from the reference
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* iLBC code supplied in RFC3951.
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*
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* Original code Copyright (C) The Internet Society (2004).
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* All changes to produce this version Copyright (C) 2008 by Steve Underwood
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* All Rights Reserved.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* $Id: packing.h,v 1.2 2008/03/06 12:27:38 steveu Exp $
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*/
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#ifndef __PACKING_H
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#define __PACKING_H
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void packsplit(int *index, /* (i) the value to split */
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int *firstpart, /* (o) the value specified by most
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significant bits */
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int *rest, /* (o) the value specified by least
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significant bits */
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int bitno_firstpart, /* (i) number of bits in most
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significant part */
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int bitno_total /* (i) number of bits in full range
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of value */
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);
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void packcombine(int *index, /* (i/o) the msb value in the combined value out */
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int rest, /* (i) the lsb value */
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int bitno_rest); /* (i) the number of bits in the lsb part */
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void dopack(uint8_t **bitstream, /* (i/o) on entrance pointer to
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place in bitstream to pack
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new data, on exit pointer
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to place in bitstream to
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pack future data */
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int index, /* (i) the value to pack */
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int bitno, /* (i) the number of bits that the
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value will fit within */
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int *pos); /* (i/o) write position in the current byte */
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void unpack(const uint8_t **bitstream, /* (i/o) on entrance pointer to
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place in bitstream to
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unpack new data from, on
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exit pointer to place in
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bitstream to unpack future
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data from */
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int *index, /* (o) resulting value */
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int bitno, /* (i) number of bits used to
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represent the value */
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int *pos); /* (i/o) read position in the current byte */
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#endif
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