60 lines
1.5 KiB
C
60 lines
1.5 KiB
C
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#pragma once
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#include "types.h"
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class ByteStream;
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class CDImage
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{
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public:
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CDImage();
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~CDImage();
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enum class ReadMode : u32
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{
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DataOnly, // 2048 bytes per sector.
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RawSector, // 2352 bytes per sector.
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RawNoSync, // 2340 bytes per sector.
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};
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// Conversion helpers.
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static constexpr u64 MSFToLBA(u32 minute, u32 second, u32 frame);
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static constexpr void LBAToMSF(u64 lba, u32* minute, u32* second, u32* frame);
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// Accessors.
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u64 GetCurrentLBA() const { return m_current_lba; }
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u64 GetLBACount() const { return m_lba_count; }
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bool Open(const char* path);
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// Seek to data LBA.
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bool Seek(u64 lba);
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// Seek to audio timestamp (MSF).
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bool Seek(u32 minute, u32 second, u32 frame);
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// Seek and read at the same time.
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u32 Read(ReadMode read_mode, u64 lba, u32 sector_count, void* buffer);
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u32 Read(ReadMode read_mode, u32 minute, u32 second, u32 frame, u32 sector_count, void* buffer);
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// Read from the current LBA. Returns the number of sectors read.
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u32 Read(ReadMode read_mode, u32 sector_count, void* buffer);
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private:
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enum : u32
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{
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RAW_SECTOR_SIZE = 2352,
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DATA_SECTOR_SIZE = 2048,
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SECTOR_SYNC_SIZE = 12,
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FRAMES_PER_SECOND = 75, // "sectors"
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SECONDS_PER_MINUTE = 60,
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FRAMES_PER_MINUTE = FRAMES_PER_SECOND * SECONDS_PER_MINUTE,
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};
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// TODO: Multiple data files from cue sheet
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ByteStream* m_data_file = nullptr;
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// Current LBA/total LBAs.
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u64 m_current_lba = 0;
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u64 m_lba_count = 0;
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};
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