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Mostly match MxDSBuffer::AllocateBuffer

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This commit is contained in:
Christian Semmler 2023-12-24 18:09:01 -05:00
parent afd24fbe18
commit f3c1fc75e2
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GPG key ID: 086DAA1360BEEE5C
2 changed files with 31 additions and 34 deletions
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63
LEGO1/mxdsbuffer.cpp
View file

@ -45,68 +45,65 @@ MxDSBuffer::~MxDSBuffer()
MxResult MxDSBuffer::AllocateBuffer(MxU32 p_bufferSize, MxDSBufferType p_mode)
{
MxResult result = FAILURE;
MxU32 i = 0;
if (p_mode == MxDSBufferType_Allocate) {
m_pBuffer = new MxU8[p_bufferSize];
}
else if (p_mode == MxDSBufferType_Chunk) {
MxStreamer* streamer = Streamer();
// I have no clue as to what this does, or even if its correct. Maybe it's related to storing chunks in
// MxDiskStreamController?
if (p_bufferSize >> 10 == 0x40) {
i = 0;
while (i < 22) {
if ((*(MxU32*) ((streamer->GetSubclass1().GetUnk08() + ((i & 0xffffffe7) >> 3)) & 1 << ((MxU8) i & 0x1f)
)) == 0) {
MxU32* ptr = (MxU32*) ((streamer->GetSubclass1().GetUnk08() + ((i & 0xffffffe7) >> 3)) &
1 << ((MxU8) i & 0x1f));
// mark it as used?
switch (p_mode) {
case MxDSBufferType_Allocate:
m_pBuffer = new MxU8[p_bufferSize];
break;
case MxDSBufferType_Chunk: {
MxStreamer* streamer = Streamer();
switch (p_bufferSize / 1024) {
case 0x40: {
for (MxU32 i = 0; i < 22; i++) {
if (((1 << (i & 0x1f)) & (*(MxU32*) &streamer->GetSubclass1().GetUnk08Ref()[(i & ~0x18u) >> 3])) == 0) {
MxU32* ptr = (MxU32*) &streamer->GetSubclass1().GetUnk08Ref()[(i & 0xffffffe7) >> 3];
*ptr = *ptr ^ 1 << (i & 0x1f);
m_pBuffer =
(MxU8*) (streamer->GetSubclass1().GetSize() * i * 0x400 + streamer->GetSubclass1().GetBuffer());
break;
goto done;
}
i++;
}
m_pBuffer = NULL;
break;
}
else if (p_bufferSize >> 10 == 0x80) {
i = 0;
// Same thing as above but it uses subclass2
while (i < 22) {
if ((*(MxU32*) ((streamer->GetSubclass2().GetUnk08() + ((i & 0xffffffe7) >> 3)) & 1 << ((MxU8) i & 0x1f)
)) == 0) {
MxU32* ptr = (MxU32*) ((streamer->GetSubclass2().GetUnk08() + ((i & 0xffffffe7) >> 3)) &
1 << ((MxU8) i & 0x1f));
case 0x80: {
for (MxU32 i = 0; i < 2; i++) {
if (((1 << (i & 0x1f)) & (*(MxU32*) &streamer->GetSubclass2().GetUnk08Ref()[(i & ~0x18u) >> 3])) == 0) {
MxU32* ptr = (MxU32*) &streamer->GetSubclass2().GetUnk08Ref()[(i & 0xffffffe7) >> 3];
// mark it as used?
*ptr = *ptr ^ 1 << (i & 0x1f);
m_pBuffer =
(MxU8*) (streamer->GetSubclass2().GetSize() * i * 0x400 + streamer->GetSubclass2().GetBuffer());
break;
goto done;
}
i++;
}
m_pBuffer = NULL;
break;
}
else {
m_pIntoBuffer = NULL;
default:
m_pBuffer = NULL;
}
}
}
done:
m_pIntoBuffer = m_pBuffer;
m_pIntoBuffer2 = m_pBuffer;
if (m_pBuffer != NULL) {
m_mode = p_mode;
m_bytesRemaining = p_bufferSize;
m_writeOffset = p_bufferSize;
result = SUCCESS;
}
return result;
}
@ -221,8 +218,8 @@ MxResult MxDSBuffer::ParseChunk(
// FUNCTION: LEGO1 0x100c6d00
MxCore* MxDSBuffer::ReadChunk(MxDSBuffer* p_buffer, MxU32* p_chunkData, MxU16 p_flags)
{
// This function reads a chunk. If it is an object, this function returns an MxDSObject. If it is a chunk, returns a
// MxDSChunk.
// This function reads a chunk. If it is an object, this function returns an MxDSObject. If it is a chunk,
// returns a MxDSChunk.
MxCore* result = NULL;
MxU8* dataStart = (MxU8*) p_chunkData + 8;

2
LEGO1/mxstreamer.h
View file

@ -22,7 +22,7 @@ public:
void SetBuffer(undefined* p_buf) { m_buffer = p_buf; }
inline undefined* GetBuffer() const { return m_buffer; }
inline undefined4 GetUnk08() const { return m_unk0x08; }
inline undefined* GetUnk08Ref() const { return (undefined*) &m_unk0x08; }
private:
undefined* m_buffer;