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///////////////////////////////////////////////////////////////////////////////
//
/// \file price_table_init.c
/// \brief Static initializations for the range encoder's prices array
//
// Copyright (C) 1999-2006 Igor Pavlov
// Copyright (C) 2007 Lasse Collin
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
///////////////////////////////////////////////////////////////////////////////
#ifdef HAVE_CONFIG_H
# include "range_encoder.h"
#endif
#define NUM_BITS (BIT_MODEL_TOTAL_BITS - MOVE_REDUCING_BITS)
uint32_t lzma_rc_prob_prices[BIT_MODEL_TOTAL >> MOVE_REDUCING_BITS];
extern void
lzma_rc_init(void)
{
// Initialize lzma_rc_prob_prices[].
for (int i = NUM_BITS - 1; i >= 0; --i) {
const uint32_t start = 1 << (NUM_BITS - i - 1);
const uint32_t end = 1 << (NUM_BITS - i);
for (uint32_t j = start; j < end; ++j) {
lzma_rc_prob_prices[j] = (i << BIT_PRICE_SHIFT_BITS)
+ (((end - j) << BIT_PRICE_SHIFT_BITS)
>> (NUM_BITS - i - 1));
}
}
return;
}
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