dpm.h

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/*
 * This file is part of the Aaru Data Preservation Suite.
 * Copyright (c) 2019-2026 Natalia Portillo.
 *
 * This library is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of the
 * License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef LIBAARUFORMAT_DPM_H
#define LIBAARUFORMAT_DPM_H
 
#include <stdint.h> /* Fixed-width integer types for on-disk packed structures */
 
#pragma pack(push, 1)


#define DPM_UNITS_PER_TURN 2560000
#define DPM_UNITS_PER_ALCOHOL_UNIT 10000

#define DPM_FLAG_OPPOSITE_TRACK_PATH 0x01

typedef enum
{
    DpmStatusUnknown      = 0,  
    DpmStatusMeasured     = 1,  
    DpmStatusRemeasured   = 2,  
    DpmStatusInterpolated = 3,  
    DpmStatusUnreadable   = 4,  
    DpmStatusLayerBreak   = 5   
} DpmEntryStatus;

typedef struct DpmHeader
{
    uint32_t identifier;      
    uint32_t entries;         
    uint32_t calibrations;    
    uint32_t nominalSpacing;  
    uint16_t timingUnit;      
    uint16_t speed;           
    uint8_t  layerEnds;       
    uint8_t  flags;           
    uint16_t reserved;        
    uint64_t length;          
    uint64_t crc64;           
} DpmHeader;

typedef struct DpmEntry
{
    uint64_t lba;     
    uint64_t angle;   
    uint8_t  status;  
} DpmEntry;

typedef struct DpmCalibration
{
    uint64_t lba;                  
    uint64_t rotationPeriod;       
    uint64_t sectorsPerTurnX1000;  
} DpmCalibration;
 
#pragma pack(pop)
 
#endif  // LIBAARUFORMAT_DPM_H