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51ec2c97c6
* 100% Match of MxDSFile * ...almost, MxDSFile::Open is still not quite matching but all of the other methods are 100% matching. * Turns out that most of the virtual methods and some of the members are actually on the MxDSSource base class, which I've pulled out as part of this. * In order to implement the methods I added the MXIOINFO class, which seems to be a thin wrapper around the MMIOINFO windows structure. We can tell this because MMIOINFO::~MMIOINFO was included in the DLL exports, and calls down to a function which deconstructs something looking exactly like MMIOINFO. * Add mxdssource.cpp * mattkc feedback * some accuracy improvements * Use FOURCC macro * Tirival solve in mxioinfo.cpp * Update mxdsfile.cpp 0xFFFFFFFF -> -1 --------- Co-authored-by: Christian Semmler <mail@csemmler.com>
130 lines
2.8 KiB
C++
130 lines
2.8 KiB
C++
#include "mxdsfile.h"
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#include <stdio.h>
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#define SI_MAJOR_VERSION 2
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#define SI_MINOR_VERSION 2
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#define FOURCC(a, b, c, d) (((a) << 0) | ((b) << 8) | ((c) << 16) | ((d) << 24))
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// OFFSET: LEGO1 0x100cc4b0
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MxDSFile::MxDSFile(const char *filename, unsigned long skipReadingChunks)
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{
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m_filename = filename;
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m_skipReadingChunks = skipReadingChunks;
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}
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// OFFSET: LEGO1 0x100bfed0
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MxDSFile::~MxDSFile()
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{
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Close();
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}
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// OFFSET: LEGO1 0x100cc590
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long MxDSFile::Open(unsigned long uStyle)
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{
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// No idea what's stopping this one matching, but I'm pretty
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// confident it has the correct behavior.
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long longResult = 1;
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memset(&m_io, 0, sizeof(MXIOINFO));
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if (m_io.Open(m_filename.GetData(), uStyle) != 0) {
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return -1;
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}
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m_io.SetBuffer(NULL, 0, 0);
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m_position = 0;
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if (m_skipReadingChunks == 0) {
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longResult = ReadChunks();
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}
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if (longResult != 0) {
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Close(); // vtable + 0x18
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}
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else {
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Seek(0, 0); // vtable + 0x24
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}
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return longResult;
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}
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// OFFSET: LEGO1 0x100cc780
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long MxDSFile::Read(unsigned char *pch, unsigned long cch)
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{
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if (m_io.Read((char*)pch, cch) != cch)
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return -1;
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m_position += cch;
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return 0;
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}
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// OFFSET: LEGO1 0x100cc620
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long MxDSFile::ReadChunks()
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{
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_MMCKINFO topChunk;
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_MMCKINFO childChunk;
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char tempBuffer[80];
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topChunk.fccType = FOURCC('O', 'M', 'N', 'I');
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if (m_io.Descend(&topChunk, NULL, MMIO_FINDRIFF) != 0) {
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return -1;
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}
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childChunk.ckid = FOURCC('M', 'x', 'H', 'd');
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if (m_io.Descend(&childChunk, &topChunk, 0) != 0) {
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return -1;
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}
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m_io.Read((char*)&m_header, 0xc);
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if ((m_header.majorVersion == SI_MAJOR_VERSION) && (m_header.minorVersion == SI_MINOR_VERSION))
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{
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childChunk.ckid = FOURCC('M', 'x', 'O', 'f');
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if (m_io.Descend(&childChunk, &topChunk, 0) != 0) {
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return -1;
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}
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unsigned long* pLengthInDWords = &m_lengthInDWords;
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m_io.Read((char *)pLengthInDWords, 4);
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m_pBuffer = malloc(*pLengthInDWords * 4);
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m_io.Read((char*)m_pBuffer, *pLengthInDWords * 4);
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return 0;
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}
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else
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{
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sprintf(tempBuffer, "Wrong SI file version. %d.%d expected.", SI_MAJOR_VERSION, SI_MINOR_VERSION);
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MessageBoxA(NULL, tempBuffer, NULL, MB_ICONERROR);
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return -1;
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}
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}
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// OFFSET: LEGO1 0x100cc7b0
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long MxDSFile::Seek(long lOffset, int iOrigin)
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{
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return (m_position = m_io.Seek(lOffset, iOrigin)) == -1 ? -1 : 0;
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}
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// OFFSET: LEGO1 0x100cc7e0
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unsigned long MxDSFile::GetBufferSize()
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{
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return m_header.bufferSize;
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}
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// OFFSET: LEGO1 0x100cc7f0
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unsigned long MxDSFile::GetStreamBuffersNum()
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{
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return m_header.streamBuffersNum;
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}
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// OFFSET: LEGO1 0x100cc740
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long MxDSFile::Close()
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{
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m_io.Close(0);
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m_position = -1;
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memset(&m_header, 0, sizeof(m_header));
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if (m_lengthInDWords != 0)
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{
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m_lengthInDWords = 0;
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free(m_pBuffer);
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m_pBuffer = NULL;
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}
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return 0;
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}
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