84 lines
2.5 KiB
C
84 lines
2.5 KiB
C
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/*
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Copyright (c) 2005-2009, The Musepack Development Team
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the following
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disclaimer in the documentation and/or other materials provided
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with the distribution.
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* Neither the name of the The Musepack Development Team nor the
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names of its contributors may be used to endorse or promote
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products derived from this software without specific prior
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written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/// \file huffman.h
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/// Data structures and functions for huffman coding.
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#ifndef _MPCDEC_HUFFMAN_H_
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#define _MPCDEC_HUFFMAN_H_
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#ifdef WIN32
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#pragma once
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#endif
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#include <mpc/mpc_types.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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// LUT size parameter, LUT size is 1 << LUT_DEPTH
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#define LUT_DEPTH 6
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/// Huffman table entry.
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typedef struct mpc_huffman_t {
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mpc_uint16_t Code;
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mpc_uint8_t Length;
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mpc_int8_t Value;
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} mpc_huffman;
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/// Huffman LUT entry.
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typedef struct mpc_huff_lut_t {
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mpc_uint8_t Length;
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mpc_int8_t Value;
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} mpc_huff_lut;
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/// Type used for huffman LUT decoding
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typedef struct mpc_lut_data_t {
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mpc_huffman const * const table;
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mpc_huff_lut lut[1 << LUT_DEPTH];
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} mpc_lut_data;
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/// Type used for canonical huffman decoding
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typedef struct mpc_can_data_t {
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mpc_huffman const * const table;
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mpc_int8_t const * const sym;
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mpc_huff_lut lut[1 << LUT_DEPTH];
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} mpc_can_data;
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void huff_init_lut(const int bits);
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#ifdef __cplusplus
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}
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#endif
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#endif
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