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-some small compression corrections

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This commit is contained in:
fix94.1 2013-01-06 18:33:29 +00:00
parent e44ec9cda1
commit 7cda297245
10 changed files with 230 additions and 255 deletions
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BIN
data/custombanner.bin
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BIN
data/save.bin
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BIN
data/stub.bin
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8
resources/wiiflow_game_booter/source/lz77.c
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@ -22,7 +22,7 @@ static inline u32 packBytes(int a, int b, int c, int d)
return (d << 24) | (c << 16) | (b << 8) | (a);
}
static int __decompressLZ77_11(u8 *in, u32 inputLen, u8 **output, u32 *outputLen)
static int __decompressLZ77_11(const u8 *in, u32 inputLen, u8 **output, u32 *outputLen)
{
int x = 0;
u32 y = 0;
@ -98,7 +98,7 @@ static int __decompressLZ77_11(u8 *in, u32 inputLen, u8 **output, u32 *outputLen
return 0;
}
static int __decompressLZ77_10(u8 *in, u8 **output, u32 *outputLen)
static int __decompressLZ77_10(const u8 *in, u8 **output, u32 *outputLen)
{
int x = 0;
u32 y = 0;
@ -148,14 +148,14 @@ static int __decompressLZ77_10(u8 *in, u8 **output, u32 *outputLen)
return 0;
}
int isLZ77compressed(u8 *buffer)
int isLZ77compressed(const u8 *buffer)
{
if((buffer[0] == LZ77_0x10_FLAG) || (buffer[0] == LZ77_0x11_FLAG))
return 1;
return 0;
}
int decompressLZ77content(u8 *buffer, u32 length, u8 **output, u32 *outputLen)
int decompressLZ77content(const u8 *buffer, u32 length, u8 **output, u32 *outputLen)
{
int ret = 0;
switch(buffer[0])

4
resources/wiiflow_game_booter/source/lz77.h
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@ -23,8 +23,8 @@
extern "C" {
#endif /* __cplusplus */
int isLZ77compressed(u8 *buffer);
int decompressLZ77content(u8 *buffer, u32 length, u8 **output, u32 *outputLen);
int isLZ77compressed(const u8 *buffer);
int decompressLZ77content(const u8 *buffer, u32 length, u8 **output, u32 *outputLen);
#ifdef __cplusplus
}

2
source/banner/AnimatedBanner.h
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@ -49,7 +49,7 @@ protected:
u8 *sysFont2;
};
u8 *DecompressCopy(const u8 *stuff, const u32 len, u32 *size);
u8 *DecompressCopy(const u8 *stuff, u32 len, u32 *size);
extern AnimatedBanner gameBanner;
#endif

4
source/channel/nand_save.cpp
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@ -21,7 +21,7 @@
#include "gecko/gecko.hpp"
#include "loader/fs.h"
#include "loader/sys.h"
#include "unzip/lz77.h"
#include "banner/AnimatedBanner.h"
#include "unzip/U8Archive.h"
extern const u8 save_bin[];
@ -65,7 +65,7 @@ bool NandSave::CheckSave()
goto done;
}
/* extract our archive */
decompressLZ77content(save_bin, save_bin_size, &u8_bin, &u8_bin_size);
u8_bin = DecompressCopy(save_bin, save_bin_size, &u8_bin_size);
if(u8_bin == NULL || u8_bin_size == 0)
goto error;
/* grab cert.sys */

12
source/homebrew/homebrew.cpp
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@ -7,6 +7,7 @@
#include <vector>
#include <string>
#include "homebrew.h"
#include "banner/AnimatedBanner.h"
#include "gecko/gecko.hpp"
#define EXECUTE_ADDR ((u8 *)0x91000000)
@ -110,9 +111,16 @@ void writeStub()
/* Clear potential homebrew channel stub */
memset((void*)0x80001800, 0, 0x1800);
/* Extract our stub */
u32 StubSize = 0;
u8 *Stub = DecompressCopy(stub_bin, stub_bin_size, &StubSize);
/* Copy our own stub into memory */
memcpy((void*)0x80001800, stub_bin, stub_bin_size);
DCFlushRange((void*)0x80001800, stub_bin_size);
memcpy((void*)0x80001800, Stub, StubSize);
DCFlushRange((void*)0x80001800, StubSize);
/* And free the memory again */
free(Stub);
}
void BootHomebrew()

387
source/unzip/lz77.c
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@ -1,210 +1,177 @@
/*******************************************************************************
* lz77.c
*
* Copyright (c) 2009 The Lemon Man
* Copyright (c) 2009 Nicksasa
* Copyright (c) 2009 WiiPower
*
* Distributed under the terms of the GNU General Public License (v2)
* See http://www.gnu.org/licenses/gpl-2.0.txt for more info.
*
* Description:
* -----------
*
******************************************************************************/
#include <gccore.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include "lz77.h"
#include "loader/utils.h"
#include "memory/mem2.hpp"
u32 packBytes(int a, int b, int c, int d)
{
return (d << 24) | (c << 16) | (b << 8) | (a);
}
s32 __decompressLZ77_11(const u8 *in, const u32 inputLen, u8 **output, u32 *outputLen)
{
int x, y;
u8 *out = NULL;
u32 compressedPos = 0x4;
u32 decompressedPos = 0x0;
u32 decompressedSize = 0;
decompressedSize = packBytes(in[0], in[1], in[2], in[3]) >> 8;
if (!decompressedSize)
{
decompressedSize = packBytes(in[4], in[5], in[6], in[7]);
compressedPos += 0x4;
}
//printf("Decompressed size : %i\n", decompressedSize);
out = MEM2_memalign(32, decompressedSize);
if (out == NULL)
{
printf("Out of memory\n");
return -1;
}
while (compressedPos < inputLen && decompressedPos < decompressedSize)
{
u8 byteFlag = in[compressedPos];
compressedPos++;
for (x = 7; x >= 0; x--)
{
if ((byteFlag & (1 << x)) > 0)
{
u8 first = in[compressedPos];
u8 second = in[compressedPos + 1];
u32 pos, copyLen;
if (first < 0x20)
{
u8 third = in[compressedPos + 2];
if (first >= 0x10)
{
u32 fourth = in[compressedPos + 3];
pos = (u32)(((third & 0xF) << 8) | fourth) + 1;
copyLen = (u32)((second << 4) | ((first & 0xF) << 12) | (third >> 4)) + 273;
compressedPos += 4;
} else
{
pos = (u32)(((second & 0xF) << 8) | third) + 1;
copyLen = (u32)(((first & 0xF) << 4) | (second >> 4)) + 17;
compressedPos += 3;
}
} else
{
pos = (u32)(((first & 0xF) << 8) | second) + 1;
copyLen = (u32)(first >> 4) + 1;
compressedPos += 2;
}
for (y = 0; y < (int)copyLen; y++)
{
out[decompressedPos + y] = out[decompressedPos - pos + y];
}
decompressedPos += copyLen;
} else
{
out[decompressedPos] = in[compressedPos];
decompressedPos++;
compressedPos++;
}
if (compressedPos >= inputLen || decompressedPos >= decompressedSize)
break;
}
}
*output = out;
*outputLen = decompressedSize;
return 0;
}
s32 __decompressLZ77_10(const u8 *in, u8 **output, u32 *outputLen)
{
int x, y;
u8 *out = NULL;
u32 compressedPos = 0;
u32 decompressedSize = 0x4;
u32 decompressedPos = 0;
decompressedSize = packBytes(in[0], in[1], in[2], in[3]) >> 8;
//int compressionType = (packBytes(in[0], in[1], in[2], in[3]) >> 4) & 0xF;
//printf("Decompressed size : %i\n", decompressedSize);
out = MEM2_memalign(32, decompressedSize);
if (out == NULL)
{
printf("Out of memory\n");
return -1;
}
compressedPos += 0x4;
while (decompressedPos < decompressedSize)
{
u8 flag = *(u8*)(in + compressedPos);
compressedPos += 1;
for (x = 0; x < 8; x++)
{
if (flag & 0x80)
{
u8 first = in[compressedPos];
u8 second = in[compressedPos + 1];
u16 pos = (u16)((((first << 8) + second) & 0xFFF) + 1);
u8 copyLen = (u8)(3 + ((first >> 4) & 0xF));
for (y = 0; y < copyLen; y++)
{
out[decompressedPos + y] = out[decompressedPos - pos + (y % pos)];
}
compressedPos += 2;
decompressedPos += copyLen;
} else
{
out[decompressedPos] = in[compressedPos];
compressedPos += 1;
decompressedPos += 1;
}
flag <<= 1;
if (decompressedPos >= decompressedSize)
break;
}
}
*output = out;
*outputLen = decompressedSize;
return 0;
}
int isLZ77compressed(const u8 *buffer)
{
if((buffer[0] == LZ77_0x10_FLAG) || (buffer[0] == LZ77_0x11_FLAG))
return 1;
return 0;
}
int decompressLZ77content(const u8 *buffer, const u32 length, u8 **output, u32 *outputLen)
{
int ret;
switch (buffer[0])
{
case LZ77_0x10_FLAG:
//printf("LZ77 variant 0x10 compressed content...unpacking may take a while...\n");
ret = __decompressLZ77_10(buffer, output, outputLen);
break;
case LZ77_0x11_FLAG:
//printf("LZ77 variant 0x11 compressed content...unpacking may take a while...\n");
ret = __decompressLZ77_11(buffer, length, output, outputLen);
break;
default:
//printf("Not compressed ...\n");
ret = -1;
break;
}
return ret;
}
/*******************************************************************************
* lz77.c
*
* Copyright (c) 2009 The Lemon Man
* Copyright (c) 2009 Nicksasa
* Copyright (c) 2009 WiiPower
*
* Distributed under the terms of the GNU General Public License (v2)
* See http://www.gnu.org/licenses/gpl-2.0.txt for more info.
*
* Description:
* -----------
*
******************************************************************************/
#include <gccore.h>
#include <stdlib.h>
#include "lz77.h"
#include "memory/mem2.hpp"
static inline u32 packBytes(int a, int b, int c, int d)
{
return (d << 24) | (c << 16) | (b << 8) | (a);
}
static int __decompressLZ77_11(const u8 *in, u32 inputLen, u8 **output, u32 *outputLen)
{
int x = 0;
u32 y = 0;
u32 compressedPos = 0x4;
u32 decompressedPos = 0;
u32 decompressedSize = packBytes(in[0], in[1], in[2], in[3]) >> 8;
if(decompressedSize == 0)
{
decompressedSize = packBytes(in[4], in[5], in[6], in[7]);
compressedPos += 0x4;
}
//printf("Decompressed size : %i\n", decompressedSize);
u8 *out = (u8*)MEM2_alloc(decompressedSize);
if(out == NULL)
{
//printf("Out of memory\n");
return -1;
}
while(compressedPos < inputLen && decompressedPos < decompressedSize)
{
u8 byteFlag = in[compressedPos];
compressedPos++;
for(x = 7; x >= 0; x--)
{
if((byteFlag & (1 << x)) > 0)
{
u8 first = in[compressedPos];
u8 second = in[compressedPos + 1];
u32 pos, copyLen;
if(first < 0x20)
{
u8 third = in[compressedPos + 2];
if(first >= 0x10)
{
u32 fourth = in[compressedPos + 3];
pos = (u32)(((third & 0xF) << 8) | fourth) + 1;
copyLen = (u32)((second << 4) | ((first & 0xF) << 12) | (third >> 4)) + 273;
compressedPos += 4;
}
else
{
pos = (u32)(((second & 0xF) << 8) | third) + 1;
copyLen = (u32)(((first & 0xF) << 4) | (second >> 4)) + 17;
compressedPos += 3;
}
}
else
{
pos = (u32)(((first & 0xF) << 8) | second) + 1;
copyLen = (u32)(first >> 4) + 1;
compressedPos += 2;
}
for(y = 0; y < copyLen; y++)
out[decompressedPos + y] = out[decompressedPos - pos + y];
decompressedPos += copyLen;
}
else
{
out[decompressedPos] = in[compressedPos];
decompressedPos++;
compressedPos++;
}
if(compressedPos >= inputLen || decompressedPos >= decompressedSize)
break;
}
}
*output = out;
*outputLen = decompressedSize;
return 0;
}
static int __decompressLZ77_10(const u8 *in, u8 **output, u32 *outputLen)
{
int x = 0;
u32 y = 0;
u32 compressedPos = 0x4;
u32 decompressedPos = 0;
u32 decompressedSize = packBytes(in[0], in[1], in[2], in[3]) >> 8;
//printf("Decompressed size : %i\n", decompressedSize);
u8 *out = (u8*)MEM2_alloc(decompressedSize);
if(out == NULL)
{
//printf("Out of memory\n");
return -1;
}
while(decompressedPos < decompressedSize)
{
u8 byteFlag = in[compressedPos];
compressedPos ++;
for(x = 0; x < 8; ++x)
{
if(byteFlag & 0x80)
{
u8 first = in[compressedPos];
u8 second = in[compressedPos + 1];
u16 pos = (u16)((((first << 8) + second) & 0xFFF) + 1);
u8 copyLen = (u8)(3 + ((first >> 4) & 0xF));
for(y = 0; y < copyLen; y++)
out[decompressedPos + y] = out[decompressedPos - pos + (y % pos)];
compressedPos += 2;
decompressedPos += copyLen;
}
else
{
out[decompressedPos] = in[compressedPos];
compressedPos += 1;
decompressedPos += 1;
}
byteFlag <<= 1;
if(decompressedPos >= decompressedSize)
break;
}
}
*output = out;
*outputLen = decompressedSize;
return 0;
}
int isLZ77compressed(const u8 *buffer)
{
if((buffer[0] == LZ77_0x10_FLAG) || (buffer[0] == LZ77_0x11_FLAG))
return 1;
return 0;
}
int decompressLZ77content(const u8 *buffer, u32 length, u8 **output, u32 *outputLen)
{
int ret = 0;
switch(buffer[0])
{
case LZ77_0x10_FLAG:
//printf("LZ77 variant 0x10 compressed content...unpacking may take a while...\n");
ret = __decompressLZ77_10(buffer, output, outputLen);
break;
case LZ77_0x11_FLAG:
//printf("LZ77 variant 0x11 compressed content...unpacking may take a while...\n");
ret = __decompressLZ77_11(buffer, length, output, outputLen);
break;
default:
//printf("Not compressed ...\n");
ret = -1;
break;
}
return ret;
}

68
source/unzip/lz77.h
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@ -1,34 +1,34 @@
/*******************************************************************************
* lz77.h
*
* Copyright (c) 2009 The Lemon Man
* Copyright (c) 2009 Nicksasa
* Copyright (c) 2009 WiiPower
*
* Distributed under the terms of the GNU General Public License (v2)
* See http://www.gnu.org/licenses/gpl-2.0.txt for more info.
*
* Description:
* -----------
*
******************************************************************************/
#ifndef _LZ77_MODULE
#define _LZ77_MODULE
#define LZ77_0x10_FLAG 0x10
#define LZ77_0x11_FLAG 0x11
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
int isLZ77compressed(const u8 *buffer);
int decompressLZ77content(const u8 *buffer, const u32 length, u8 **output, u32 *outputLen);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif
/*******************************************************************************
* lz77.h
*
* Copyright (c) 2009 The Lemon Man
* Copyright (c) 2009 Nicksasa
* Copyright (c) 2009 WiiPower
*
* Distributed under the terms of the GNU General Public License (v2)
* See http://www.gnu.org/licenses/gpl-2.0.txt for more info.
*
* Description:
* -----------
*
******************************************************************************/
#ifndef _LZ77_MODULE
#define _LZ77_MODULE
#define LZ77_0x10_FLAG 0x10
#define LZ77_0x11_FLAG 0x11
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
int isLZ77compressed(const u8 *buffer);
int decompressLZ77content(const u8 *buffer, u32 length, u8 **output, u32 *outputLen);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif