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Large blob code cleanup. Compressed ISO ("gcz") support reactivated. Beginnings of raw drive reading code. Deprecate file mapping in an ugly way.

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git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@566 8ced0084-cf51-0410-be5f-012b33b47a6e
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hrydgard
2008-09-17 23:25:35 +00:00
parent 2cd7acfaee
commit cb90e61368
31 changed files with 1209 additions and 844 deletions
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88
Source/Core/DiscIO/Src/Blob.h
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@ -1,54 +1,73 @@
// Copyright (C) 2003-2008 Dolphin Project.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0.
// This program 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 General Public License 2.0 for more details.
// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/
// Official SVN repository and contact information can be found at
// http://code.google.com/p/dolphin-emu/
#ifndef _BLOB_H
#define _BLOB_H
/*
Code not big-endian safe.
// BLOB
BLOB
// Blobs in Dolphin are read only Binary Large OBjects. For example, a typical DVD image.
// Often, you may want to store these things in a highly compressed format, but still
// allow random access. Or you may store them on an odd device, like raw on a DVD.
Blobs are Binary Large OBjects. For example, a typical DVD image.
Often, you may want to store these things in a highly compressed format, but still
allow random access.
Always read your BLOBs using an interface returned by CreateBlobReader(). It will
detect whether the file is a compressed blob, or just a big hunk of data, and
automatically do the right thing.
To create new BLOBs, use CompressFileToBlob.
Right now caching of decompressed chunks doesn't work, so it's a bit slow.
*/
// Always read your BLOBs using an interface returned by CreateBlobReader(). It will
// detect whether the file is a compressed blob, or just a big hunk of data, and
// automatically do the right thing.
#include "Common.h"
namespace DiscIO
{
class IBlobReader
{
public:
public:
virtual ~IBlobReader() {}
virtual ~IBlobReader() {}
virtual u64 GetRawSize() const = 0;
virtual u64 GetDataSize() const = 0;
virtual bool Read(u64 offset, u64 size, u8* out_ptr) = 0;
virtual u64 GetRawSize() const = 0;
virtual u64 GetDataSize() const = 0;
virtual bool Read(u64 offset, u64 size, u8* out_ptr) = 0;
protected:
IBlobReader() {}
private:
IBlobReader(const IBlobReader& /*other*/) {}
protected:
IBlobReader() {}
};
IBlobReader* CreateBlobReader(const char* filename);
bool IsCompressedBlob(const char* filename);
// Provides caching and split-operation-to-block-operations facilities.
// Used for compressed blob reading and direct drive reading.
class SectorReader : public IBlobReader
{
private:
virtual void GetBlock(u64 block_num, u8 *out) = 0;
enum { CACHE_SIZE = 32 };
int m_blocksize;
u8* cache[CACHE_SIZE];
u64 cache_tags[CACHE_SIZE];
int cache_age[CACHE_SIZE];
protected:
void SetSectorSize(int blocksize);
public:
~SectorReader();
const u8 *GetBlockData(u64 block_num);
bool Read(u64 offset, u64 size, u8* out_ptr);
};
// Factory function - examines the path to choose the right type of IBlobReader, and returns one.
IBlobReader* CreateBlobReader(const char* filename);
typedef void (*CompressCB)(const char* text, float percent, void* arg);
@ -56,7 +75,8 @@ bool CompressFileToBlob(const char* infile, const char* outfile, u32 sub_type =
CompressCB callback = 0, void* arg = 0);
bool DecompressBlobToFile(const char* infile, const char* outfile,
CompressCB callback = 0, void* arg = 0);
}
} // namespace
#endif