Chris@69: /* Copyright (c) 2007 CSIRO
Chris@69:    Copyright (c) 2007-2009 Xiph.Org Foundation
Chris@69:    Written by Jean-Marc Valin */
Chris@69: /*
Chris@69:    Redistribution and use in source and binary forms, with or without
Chris@69:    modification, are permitted provided that the following conditions
Chris@69:    are met:
Chris@69: 
Chris@69:    - Redistributions of source code must retain the above copyright
Chris@69:    notice, this list of conditions and the following disclaimer.
Chris@69: 
Chris@69:    - Redistributions in binary form must reproduce the above copyright
Chris@69:    notice, this list of conditions and the following disclaimer in the
Chris@69:    documentation and/or other materials provided with the distribution.
Chris@69: 
Chris@69:    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
Chris@69:    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
Chris@69:    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
Chris@69:    A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
Chris@69:    OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
Chris@69:    EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
Chris@69:    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
Chris@69:    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
Chris@69:    LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
Chris@69:    NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
Chris@69:    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Chris@69: */
Chris@69: 
Chris@69: #include "entenc.h"
Chris@69: #include "entdec.h"
Chris@69: 
Chris@69: /** Encode a value that is assumed to be the realisation of a
Chris@69:     Laplace-distributed random process
Chris@69:  @param enc Entropy encoder state
Chris@69:  @param value Value to encode
Chris@69:  @param fs Probability of 0, multiplied by 32768
Chris@69:  @param decay Probability of the value +/- 1, multiplied by 16384
Chris@69: */
Chris@69: void ec_laplace_encode(ec_enc *enc, int *value, unsigned fs, int decay);
Chris@69: 
Chris@69: /** Decode a value that is assumed to be the realisation of a
Chris@69:     Laplace-distributed random process
Chris@69:  @param dec Entropy decoder state
Chris@69:  @param fs Probability of 0, multiplied by 32768
Chris@69:  @param decay Probability of the value +/- 1, multiplied by 16384
Chris@69:  @return Value decoded
Chris@69:  */
Chris@69: int ec_laplace_decode(ec_dec *dec, unsigned fs, int decay);