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#include "JSystem/JSystem.h" // IWYU pragma: keep
#include "JSystem/JKernel/JKRDecomp.h"
#include "JSystem/JKernel/JKRAramPiece.h"
#include "global.h"
#if PLATFORM_GCN
const u32 stack_size = 0x800;
#else
const u32 stack_size = 0x4000;
#endif
JKRDecomp* JKRDecomp::sDecompObject;
JKRDecomp* JKRDecomp::create(s32 priority) {
if (!sDecompObject) {
sDecompObject = new (JKRGetSystemHeap(), 0) JKRDecomp(priority);
}
return sDecompObject;
}
OSMessage JKRDecomp::sMessageBuffer[8] = {0};
OSMessageQueue JKRDecomp::sMessageQueue = {0};
JKRDecomp::JKRDecomp(s32 priority) : JKRThread(stack_size, 0x10, priority) {
resume();
}
JKRDecomp::~JKRDecomp() {}
void* JKRDecomp::run() {
OSInitMessageQueue(&sMessageQueue, sMessageBuffer, 8);
for (;;) {
OSMessage message;
OSReceiveMessage(&sMessageQueue, &message, OS_MESSAGE_BLOCK);
JKRDecompCommand* command = (JKRDecompCommand*)message;
decode(command->mSrcBuffer, command->mDstBuffer, command->mSrcLength, command->mDstLength);
if (command->field_0x20 != 0) {
if (command->field_0x20 == 1) {
JKRAramPcs_SendCommand(command->mAMCommand);
}
continue;
}
if (command->mCallback) {
(*command->mCallback)((u32)command);
continue;
}
if (command->field_0x1c) {
OSSendMessage(command->field_0x1c, (OSMessage)1, OS_MESSAGE_NOBLOCK);
} else {
OSSendMessage(&command->mMessageQueue, (OSMessage)1, OS_MESSAGE_NOBLOCK);
}
}
}
JKRDecompCommand* JKRDecomp::prepareCommand(u8* srcBuffer, u8* dstBuffer, u32 srcLength,
u32 dstLength,
JKRDecompCommand::AsyncCallback callback) {
JKRDecompCommand* command = new (JKRGetSystemHeap(), -4) JKRDecompCommand();
command->mSrcBuffer = srcBuffer;
command->mDstBuffer = dstBuffer;
command->mSrcLength = srcLength;
command->mDstLength = dstLength;
command->mCallback = callback;
return command;
}
void JKRDecomp::sendCommand(JKRDecompCommand* command) {
int result = OSSendMessage(&sMessageQueue, command, OS_MESSAGE_NOBLOCK);
JUT_ASSERT_MSG(142, result, "Decomp MesgBuf FULL!");
}
JKRDecompCommand* JKRDecomp::orderAsync(u8* srcBuffer, u8* dstBuffer, u32 srcLength, u32 dstLength,
JKRDecompCommand::AsyncCallback callback) {
JKRDecompCommand* command =
prepareCommand(srcBuffer, dstBuffer, srcLength, dstLength, callback);
sendCommand(command);
return command;
}
bool JKRDecomp::sync(JKRDecompCommand* command, int isNonBlocking) {
OSMessage message;
if (isNonBlocking == JKRDECOMP_SYNC_BLOCKING) {
OSReceiveMessage(&command->mMessageQueue, &message, OS_MESSAGE_BLOCK);
return true;
}
bool result;
if (!OSReceiveMessage(&command->mMessageQueue, &message, OS_MESSAGE_NOBLOCK)) {
result = false;
} else {
result = true;
}
return result;
}
bool JKRDecomp::orderSync(u8* srcBuffer, u8* dstBuffer, u32 srcLength, u32 dstLength) {
JKRDecompCommand* command = orderAsync(srcBuffer, dstBuffer, srcLength, dstLength, NULL);
bool result = sync(command, JKRDECOMP_SYNC_BLOCKING);
delete command;
return result;
}
void JKRDecomp::decode(u8* srcBuffer, u8* dstBuffer, u32 srcLength, u32 dstLength) {
JKRCompression compression = checkCompressed(srcBuffer);
if (compression == COMPRESSION_YAY0) {
decodeSZP(srcBuffer, dstBuffer, srcLength, dstLength);
} else if (compression == COMPRESSION_YAZ0) {
decodeSZS(srcBuffer, dstBuffer, srcLength, dstLength);
}
}
void JKRDecomp::decodeSZP(u8* src, u8* dst, u32 srcLength, u32 dstLength) {
int srcChunkOffset;
int count;
int dstOffset;
u32 length = srcLength;
int linkInfo;
int offset;
int i;
int decodedSize = READU32_BE(src, 4);
int linkTableOffset = READU32_BE(src, 8);
int srcDataOffset = READU32_BE(src, 12);
dstOffset = 0;
u32 counter = 0;
srcChunkOffset = 16;
u32 chunkBits;
if (srcLength == 0)
return;
if (dstLength > decodedSize)
return;
do
{
if (counter == 0)
{
chunkBits = READU32_BE(src, srcChunkOffset);
srcChunkOffset += sizeof(u32);
counter = sizeof(u32) * 8;
}
if (chunkBits & 0x80000000)
{
if (dstLength == 0)
{
dst[dstOffset] = src[srcDataOffset];
length--;
if (length == 0)
return;
}
else
{
dstLength--;
}
dstOffset++;
srcDataOffset++;
}
else
{
linkInfo = src[linkTableOffset] << 8 | src[linkTableOffset + 1];
linkTableOffset += sizeof(u16);
offset = dstOffset - (linkInfo & 0xFFF);
count = (linkInfo >> 12);
if (count == 0)
{
count = (u32)src[srcDataOffset++] + 0x12;
}
else
count += 2;
if (count > decodedSize - dstOffset)
count = decodedSize - dstOffset;
for (i = 0; i < count; i++, dstOffset++, offset++)
{
if (dstLength == 0)
{
dst[dstOffset] = dst[offset - 1];
length--;
if (length == 0)
return;
}
else
dstLength--;
}
}
chunkBits <<= 1;
counter--;
} while (dstOffset < decodedSize);
}
void JKRDecomp::decodeSZS(u8* src_buffer, u8* dst_buffer, u32 srcSize, u32 dstSize) {
u8* decompEnd;
u8* copyStart;
s32 copyByteCount;
s32 chunkBitsLeft = 0;
s32 chunkBits;
decompEnd = dst_buffer + *(int*)(src_buffer + 4) - dstSize;
if (srcSize == 0) {
return;
}
if (dstSize > *(u32*)src_buffer) {
return;
}
u8* curSrcPos = src_buffer + 0x10;
do {
if (chunkBitsLeft == 0) {
chunkBits = curSrcPos[0];
chunkBitsLeft = 8;
curSrcPos++;
}
if ((chunkBits & 0x80) != 0) {
if (dstSize == 0) {
dst_buffer[0] = curSrcPos[0];
srcSize--;
dst_buffer++;
if (srcSize == 0)
return;
} else {
dstSize--;
}
curSrcPos++;
} else {
u32 local_28 = curSrcPos[1] | (curSrcPos[0] & 0xF) << 8;
u32 r31 = curSrcPos[0] >> 4;
curSrcPos += 2;
copyStart = dst_buffer - local_28;
if (r31 == 0) {
copyByteCount = curSrcPos[0] + 0x12;
curSrcPos++;
} else {
copyByteCount = r31 + 2;
}
do {
if (dstSize == 0) {
dst_buffer[0] = copyStart[-1];
srcSize--;
dst_buffer++;
if (srcSize == 0)
return;
} else {
dstSize--;
}
copyByteCount--;
copyStart++;
} while (copyByteCount != 0);
}
chunkBits <<= 1;
chunkBitsLeft--;
} while (dst_buffer != decompEnd);
}
JKRCompression JKRDecomp::checkCompressed(u8* src) {
if ((src[0] == 'Y') && (src[1] == 'a') && (src[3] == '0')) {
if (src[2] == 'y') {
return COMPRESSION_YAY0;
}
if (src[2] == 'z') {
return COMPRESSION_YAZ0;
}
}
if ((src[0] == 'A') && (src[1] == 'S') && (src[2] == 'R')) {
return COMPRESSION_ASR;
}
return COMPRESSION_NONE;
}
JKRDecompCommand::JKRDecompCommand() {
OSInitMessageQueue(&mMessageQueue, &mMessage, 1);
mCallback = NULL;
field_0x1c = NULL;
mThis = this;
field_0x20 = 0;
}
JKRDecompCommand::~JKRDecompCommand() {}
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