RwBinaryStream

Reading Binary Streams

RwStreams are heirarchical streams of sections. Every section consists of:

• (gauranteed) RwHeader
• (gauranteed) RwData child section (the contents are specific to the section type, see definitions below.)
• (optional) Children sections

The RwHeader contains the size (sectionSize member) of all the data and children (and their data and children). This allows you to either skip the entire section and it's children by advancing the stream pointer, or to know when you have parsed all it's children by comparing the stream pointer to the address of the section RwHeader added to the sectionSize.

Simple Pseudo C++ Code to read a Binary Stream

RwSection * ReadSection(FileStream * stream, RwSection * parent)
{
	// read the header
	RwHeader header = ReadRwHeader(stream);
	
	// create the section - the type returned is based on header.sectionType
	// the reason the parent is passed in is because if the section is an
	// rwDATA what data it reads is dependant on the parent
	RwSection * section = CreateAppropriateSection(stream, header.sectionType, parent->GetSectionType());
	
	// rescursivly read the children
	u8 * endOfSection = stream.GetPosition() + header.sectionSize;
	while(stream.GetPosition() < endOfSection)
	{
		RwSection * childSection = ReadSection(stream, section)
		section->AddChild(childSection);
	}
	
	return section;
}

RwType

enum
{
    rwDATA = 1,
    rwSTRING = 2,
    rwEXTENSION = 3,
    rwTEXTURE = 6,
    rwMATERIAL = 7,
    rwMATERIALLIST = 8,
    rwFRAMELIST = 14,
    rwGEOMETRY = 15,
    rwCLUMP = 16,
    rwLIGHT = 18,
    rwATOMIC = 20,
    rwTEXTURENATIVE = 21,
    rwTEXDICT = 22,
    rwGEOMETRYLIST = 26,
    rwMATERIALSPLIT = 124,
    rwFRAME = 39056126,
    rwPLUGIN_PARTICLES = 0x118,
    rwPLUGIN_MATERIALEFFECTS = 0x120,
    rwPLUGIN_BINMESH = 0x50e,
};

RwHeader

struct RwHeader
{
    s32 sectionType; // RwType
    s32 sectionSize;
    u8 unknown[2];
    s16 versionNumber;
};

Dff Files

Top level section is always a single RwClump.

RwClump section

VersionNumber(s) 0, 2048

• Gauranteed
• First and only data

struct RwClump_RwData
{
    s32 objectCount;
}; 

VersionNumber(s) 3074, 4099, 6147

• Gauranteed
• First data

struct RwClump_RwData
{
    s32 objectCount;
    u8 unknown[8];
};

• Optional
• Second and subsequent data

struct RwClump_RwData
{
    u8 unknown[4];
};

Txd Files

Top level section is always a single RwTexdict.