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 33 extern "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 57 typedef 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 68 struct BitBuffer; 69 70 void set_standard_ag_params(AGParamRecPtr params, uint32_t fullwidth, uint32_t sectorwidth); 71 void set_ag_params(AGParamRecPtr params, uint32_t m, uint32_t p, uint32_t k, uint32_t f, uint32_t s, uint32_t maxrun); 72 73 int32_t dyn_comp(AGParamRecPtr params, int32_t * pc, struct BitBuffer * bitstream, int32_t numSamples, int32_t bitSize, uint32_t * outNumBits); 74 int32_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