winamp/Src/external_dependencies/openmpt-trunk/include/lhasa/lib/lh5_decoder.c

/*

Copyright (c) 2011, 2012, Simon Howard

Permission to use, copy, modify, and/or distribute this software
for any purpose with or without fee is hereby granted, provided
that the above copyright notice and this permission notice appear
in all copies.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

 */

//
// Decoder for the -lh5- algorithm.
//
// This is the "new" algorithm that appeared in LHA v2, replacing
// the older -lh1-. -lh4- seems to be identical to -lh5-.
//

// 16 KiB history ring buffer:

#define HISTORY_BITS    14   /* 2^14 = 16384 */

// Number of bits to encode HISTORY_BITS:

#define OFFSET_BITS     4

// Name of the variable for the encoder:

#define DECODER_NAME lha_lh5_decoder

// Generate a second decoder for lh4 that just has a different
// block size.

#define DECODER2_NAME lha_lh4_decoder

// The actual algorithm code is contained in lh_new_decoder.c, which
// acts as a template for -lh4-, -lh5-, -lh6- and -lh7-.

#include "lh_new_decoder.c"