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