1/* 2 * Copyright (c) 2011 Apple Inc. All rights reserved. 3 * 4 * @APPLE_APACHE_LICENSE_HEADER_START@ 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License") ; 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 * 18 * @APPLE_APACHE_LICENSE_HEADER_END@ 19 */ 20 21/* 22 File: aglib.h 23 24 Copyright: (C) 2001-2011 Apple, Inc. 25*/ 26 27#ifndef AGLIB_H 28#define AGLIB_H 29 30#include <stdint.h> 31 32#ifdef __cplusplus 33extern "C" { 34#endif 35 36#define QBSHIFT 9 37#define QB (1 << QBSHIFT) 38#define PB0 40 39#define MB0 10 40#define KB0 14 41#define MAX_RUN_DEFAULT 255 42 43#define MMULSHIFT 2 44#define MDENSHIFT (QBSHIFT - MMULSHIFT - 1) 45#define MOFF ((1 << (MDENSHIFT - 2))) 46 47#define BITOFF 24 48 49/* Max. prefix of 1's. */ 50#define MAX_PREFIX_16 9 51#define MAX_PREFIX_TOLONG_16 15 52#define MAX_PREFIX_32 9 53 54/* Max. bits in 16-bit data type */ 55#define MAX_DATATYPE_BITS_16 16 56 57typedef struct AGParamRec 58{ 59 uint32_t mb, mb0, pb, kb, wb, qb ; 60 uint32_t fw, sw ; 61 62 uint32_t maxrun ; 63 64 // fw = 1, sw = 1 ; 65 66} AGParamRec, *AGParamRecPtr ; 67 68struct BitBuffer ; 69 70void set_standard_ag_params (AGParamRecPtr params, uint32_t fullwidth, uint32_t sectorwidth) ; 71void set_ag_params (AGParamRecPtr params, uint32_t m, uint32_t p, uint32_t k, uint32_t f, uint32_t s, uint32_t maxrun) ; 72 73int32_t dyn_comp (AGParamRecPtr params, int32_t * pc, struct BitBuffer * bitstream, int32_t numSamples, int32_t bitSize, uint32_t * outNumBits) ; 74int32_t dyn_decomp (AGParamRecPtr params, struct BitBuffer * bitstream, int32_t * pc, int32_t numSamples, int32_t maxSize, uint32_t * outNumBits) ; 75 76 77#ifdef __cplusplus 78} 79#endif 80 81#endif //#ifndef AGLIB_H 82