aglib.h

/*
 * Copyright (c) 2011 Apple Inc. All rights reserved.
 *
 * @APPLE_APACHE_LICENSE_HEADER_START@
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * @APPLE_APACHE_LICENSE_HEADER_END@
 */

/*
    File:       aglib.h

    Copyright:  (C) 2001-2011 Apple, Inc.
*/

#ifndef AGLIB_H
#define AGLIB_H

#include <stdint.h>

#ifdef __cplusplus
extern "C" {
#endif

#define QBSHIFT 9
#define QB (1<<QBSHIFT)
#define PB0 40
#define MB0 10
#define KB0 14
#define MAX_RUN_DEFAULT 255

#define MMULSHIFT 2
#define MDENSHIFT (QBSHIFT - MMULSHIFT - 1)
#define MOFF ((1<<(MDENSHIFT-2)))

#define BITOFF 24

/* Max. prefix of 1's. */
#define MAX_PREFIX_16           9
#define MAX_PREFIX_TOLONG_16    15
#define MAX_PREFIX_32           9

/* Max. bits in 16-bit data type */
#define MAX_DATATYPE_BITS_16    16

typedef struct AGParamRec
{
    uint32_t mb, mb0, pb, kb, wb, qb;
    uint32_t fw, sw;

    uint32_t maxrun;

    // fw = 1, sw = 1;

} AGParamRec, *AGParamRecPtr;

struct BitBuffer;

void    set_standard_ag_params(AGParamRecPtr params, uint32_t fullwidth, uint32_t sectorwidth);
void    set_ag_params(AGParamRecPtr params, uint32_t m, uint32_t p, uint32_t k, uint32_t f, uint32_t s, uint32_t maxrun);

int32_t     dyn_comp(AGParamRecPtr params, int32_t * pc, struct BitBuffer * bitstream, uint32_t numSamples, int32_t bitSize, uint32_t * outNumBits);
int32_t     dyn_decomp(AGParamRecPtr params, struct BitBuffer * bitstream, int32_t * pc, uint32_t numSamples, int32_t maxSize, uint32_t * outNumBits);


#ifdef __cplusplus
}
#endif

#endif //#ifndef AGLIB_H