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https://github.com/hrydgard/ppsspp.git
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dd5c91108c
This way we don't get slow startup. This will also cache the CSO data, for example, rather than the raw data, using up less RAM. It might even be reasonable to enable on 32-bit.
126 lines
3 KiB
C++
126 lines
3 KiB
C++
// Copyright (c) 2012- PPSSPP Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0 or later versions.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official git repository and contact information can be found at
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// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
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#pragma once
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// Abstractions around read-only blockdevices, such as PSP UMD discs.
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// CISOFileBlockDevice implements compressed iso images, CISO format.
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//
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// The ISOFileSystemReader reads from a BlockDevice, so it automatically works
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// with CISO images.
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#include "Common/CommonTypes.h"
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#include "Core/ELF/PBPReader.h"
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class FileLoader;
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class BlockDevice
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{
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public:
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virtual ~BlockDevice() {}
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virtual bool ReadBlock(int blockNumber, u8 *outPtr) = 0;
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virtual bool ReadBlocks(u32 minBlock, int count, u8 *outPtr) {
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for (int b = 0; b < count; ++b) {
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if (!ReadBlock(minBlock + b, outPtr)) {
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return false;
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}
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outPtr += GetBlockSize();
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}
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return true;
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}
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int GetBlockSize() const { return 2048;} // forced, it cannot be changed by subclasses
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virtual u32 GetNumBlocks() = 0;
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};
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class CISOFileBlockDevice : public BlockDevice
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{
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public:
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CISOFileBlockDevice(FileLoader *fileLoader);
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~CISOFileBlockDevice();
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bool ReadBlock(int blockNumber, u8 *outPtr) override;
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bool ReadBlocks(u32 minBlock, int count, u8 *outPtr) override;
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u32 GetNumBlocks() override { return numBlocks; }
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private:
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FileLoader *fileLoader_;
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u32 *index;
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u8 *readBuffer;
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u8 *zlibBuffer;
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u32 zlibBufferFrame;
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u8 indexShift;
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u8 blockShift;
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u32 frameSize;
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u32 numBlocks;
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u32 numFrames;
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};
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class FileBlockDevice : public BlockDevice
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{
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public:
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FileBlockDevice(FileLoader *fileLoader);
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~FileBlockDevice();
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bool ReadBlock(int blockNumber, u8 *outPtr) override;
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bool ReadBlocks(u32 minBlock, int count, u8 *outPtr) override;
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u32 GetNumBlocks() override {return (u32)(filesize_ / GetBlockSize());}
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private:
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FileLoader *fileLoader_;
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u64 filesize_;
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};
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// For encrypted ISOs in PBP files.
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struct table_info {
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u8 mac[16];
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u32 offset;
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int size;
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int flag;
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int unk_1c;
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};
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class NPDRMDemoBlockDevice : public BlockDevice
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{
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public:
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NPDRMDemoBlockDevice(FileLoader *fileLoader);
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~NPDRMDemoBlockDevice();
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bool ReadBlock(int blockNumber, u8 *outPtr) override;
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u32 GetNumBlocks() override {return (u32)lbaSize;}
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private:
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FileLoader *fileLoader_;
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u32 lbaSize;
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u32 psarOffset;
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int blockSize;
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int blockLBAs;
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u32 numBlocks;
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u8 vkey[16];
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u8 hkey[16];
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struct table_info *table;
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int currentBlock;
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u8 *blockBuf;
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u8 *tempBuf;
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};
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BlockDevice *constructBlockDevice(FileLoader *fileLoader);
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