nuclear@0: 
nuclear@0: 
nuclear@0: // Definitions for the Interchange File Format (IFF)
nuclear@0: // Alexander Gessler, 2006
nuclear@0: // Adapted to Assimp August 2008
nuclear@0: 
nuclear@0: #ifndef AI_IFF_H_INCLUDED
nuclear@0: #define AI_IFF_H_INCLUDED
nuclear@0: 
nuclear@0: #include "ByteSwap.h"
nuclear@0: 
nuclear@0: namespace Assimp	{
nuclear@0: namespace IFF		{
nuclear@0: 
nuclear@0: #include "assimp/Compiler/pushpack1.h"
nuclear@0: 
nuclear@0: /////////////////////////////////////////////////////////////////////////////////
nuclear@0: //! Describes an IFF chunk header
nuclear@0: /////////////////////////////////////////////////////////////////////////////////
nuclear@0: struct ChunkHeader
nuclear@0: {
nuclear@0: 	//! Type of the chunk header - FourCC
nuclear@0: 	uint32_t type;
nuclear@0: 
nuclear@0: 	//! Length of the chunk data, in bytes
nuclear@0: 	uint32_t length;
nuclear@0: } PACK_STRUCT;
nuclear@0: 
nuclear@0: 
nuclear@0: /////////////////////////////////////////////////////////////////////////////////
nuclear@0: //! Describes an IFF sub chunk header
nuclear@0: /////////////////////////////////////////////////////////////////////////////////
nuclear@0: struct SubChunkHeader
nuclear@0: {
nuclear@0: 	//! Type of the chunk header - FourCC
nuclear@0: 	uint32_t type;
nuclear@0: 
nuclear@0: 	//! Length of the chunk data, in bytes
nuclear@0: 	uint16_t length;
nuclear@0: } PACK_STRUCT;
nuclear@0: 
nuclear@0: #include "assimp/Compiler/poppack1.h"
nuclear@0: 
nuclear@0: 
nuclear@0: #define AI_IFF_FOURCC(a,b,c,d) ((uint32_t) (((uint8_t)a << 24u) | \
nuclear@0: 	((uint8_t)b << 16u) | ((uint8_t)c << 8u) | ((uint8_t)d)))
nuclear@0: 
nuclear@0: 
nuclear@0: #define AI_IFF_FOURCC_FORM AI_IFF_FOURCC('F','O','R','M')
nuclear@0: 
nuclear@0: 
nuclear@0: /////////////////////////////////////////////////////////////////////////////////
nuclear@0: //! Load a chunk header
nuclear@0: //! @param outFile Pointer to the file data - points to the chunk data afterwards
nuclear@0: //! @return Pointer to the chunk header
nuclear@0: /////////////////////////////////////////////////////////////////////////////////
nuclear@0: inline ChunkHeader* LoadChunk(uint8_t*& outFile)
nuclear@0: {
nuclear@0: 	ChunkHeader* head = (ChunkHeader*) outFile;
nuclear@0: 	AI_LSWAP4(head->length);
nuclear@0: 	AI_LSWAP4(head->type);
nuclear@0: 	outFile += sizeof(ChunkHeader);
nuclear@0: 	return head;
nuclear@0: }
nuclear@0: 
nuclear@0: /////////////////////////////////////////////////////////////////////////////////
nuclear@0: //! Load a sub chunk header
nuclear@0: //! @param outFile Pointer to the file data - points to the chunk data afterwards
nuclear@0: //! @return Pointer to the sub chunk header
nuclear@0: /////////////////////////////////////////////////////////////////////////////////
nuclear@0: inline SubChunkHeader* LoadSubChunk(uint8_t*& outFile)
nuclear@0: {
nuclear@0: 	SubChunkHeader* head = (SubChunkHeader*) outFile;
nuclear@0: 	AI_LSWAP2(head->length);
nuclear@0: 	AI_LSWAP4(head->type);
nuclear@0: 	outFile += sizeof(SubChunkHeader);
nuclear@0: 	return head;
nuclear@0: }
nuclear@0: 
nuclear@0: /////////////////////////////////////////////////////////////////////////////////
nuclear@0: //! Read the file header and return the type of the file and its size
nuclear@0: //! @param outFile Pointer to the file data. The buffer must at 
nuclear@0: //!   least be 12 bytes large.
nuclear@0: //! @param fileType Receives the type of the file
nuclear@0: //! @return 0 if everything was OK, otherwise an error message
nuclear@0: /////////////////////////////////////////////////////////////////////////////////
nuclear@0: inline const char* ReadHeader(uint8_t* outFile,uint32_t& fileType) 
nuclear@0: {
nuclear@0: 	ChunkHeader* head = LoadChunk(outFile);
nuclear@0: 	if(AI_IFF_FOURCC_FORM != head->type)
nuclear@0: 	{
nuclear@0: 		return "The file is not an IFF file: FORM chunk is missing";
nuclear@0: 	}
nuclear@0: 	fileType = *((uint32_t*)(head+1));
nuclear@0: 	AI_LSWAP4(fileType);
nuclear@0: 	return 0;
nuclear@0: }
nuclear@0: 
nuclear@0: 
nuclear@0: }}
nuclear@0: 
nuclear@0: #endif // !! AI_IFF_H_INCLUDED