assimp/code/FBXImporter.cpp

/*
Open Asset Import Library (assimp)
----------------------------------------------------------------------

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All rights reserved.

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with or without modification, are permitted provided that the 
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* Redistributions of source code must retain the above
  copyright notice, this list of conditions and the
  following disclaimer.

* Redistributions in binary form must reproduce the above
  copyright notice, this list of conditions and the
  following disclaimer in the documentation and/or other
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* Neither the name of the assimp team, nor the names of its
  contributors may be used to endorse or promote products
  derived from this software without specific prior
  written permission of the assimp team.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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*/

/** @file  FBXImporter.cpp
 *  @brief Implementation of the FBX importer.
 */
#include "AssimpPCH.h"

#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER

#include <iterator>
#include <boost/tuple/tuple.hpp>


#include "FBXImporter.h"

#include "FBXTokenizer.h"
#include "FBXParser.h"
#include "FBXUtil.h"

#include "StreamReader.h"
#include "MemoryIOWrapper.h"

namespace Assimp {
	template<> const std::string LogFunctions<FBXImporter>::log_prefix = "FBX: ";
}

using namespace Assimp;
using namespace Assimp::Formatter;
using namespace Assimp::FBX;

namespace {
static const aiImporterDesc desc = {
	"Autodesk FBX Importer",
	"",
	"",
	"",
	aiImporterFlags_SupportTextFlavour,
	0,
	0,
	0,
	0,
	"fbx" 
};
}

// ------------------------------------------------------------------------------------------------
// Constructor to be privately used by #Importer
FBXImporter::FBXImporter()
{}

// ------------------------------------------------------------------------------------------------
// Destructor, private as well 
FBXImporter::~FBXImporter()
{
}

// ------------------------------------------------------------------------------------------------
// Returns whether the class can handle the format of the given file. 
bool FBXImporter::CanRead( const std::string& pFile, IOSystem* pIOHandler, bool checkSig) const
{
	const std::string& extension = GetExtension(pFile);
	if (extension == "fbx") {
		return true;
	}

	else if ((!extension.length() || checkSig) && pIOHandler)	{
		// at least ascii FBX files usually have a 'FBX' somewhere in their head
		const char* tokens[] = {"FBX"};
		return SearchFileHeaderForToken(pIOHandler,pFile,tokens,1);
	}
	return false;
}

// ------------------------------------------------------------------------------------------------
// List all extensions handled by this loader
const aiImporterDesc* FBXImporter::GetInfo () const
{
	return &desc;
}


// ------------------------------------------------------------------------------------------------
// Setup configuration properties for the loader
void FBXImporter::SetupProperties(const Importer* pImp)
{
	// no tweakables yet
}


// ------------------------------------------------------------------------------------------------
// Imports the given file into the given scene structure. 
void FBXImporter::InternReadFile( const std::string& pFile, 
	aiScene* pScene, IOSystem* pIOHandler)
{
	boost::scoped_ptr<IOStream> stream(pIOHandler->Open(pFile,"rb"));
	if (!stream) {
		ThrowException("Could not open file for reading");
	}

	// read entire file into memory - no streaming for this, fbx
	// files can grow large, but the assimp output data structure
	// then becomes very large, too. Assimp doesn't support
	// streaming for its output data structures so the net win with
	// streaming input data would be very low.
	std::vector<char> contents;
	contents.resize(stream->FileSize());

	stream->Read(&*contents.begin(),contents.size(),1);
	const char* const begin = &*contents.begin();

	// broadphase tokenizing pass in which we identify the core
	// syntax elements of FBX (brackets, commas, key:value mappings)
	TokenList tokens;
	try {
		Tokenize(tokens,begin);

		// use this information to construct a very rudimentary 
		// parse-tree representing the FBX scope structure
		Parser parser(tokens);
	}
	catch(...) {
		std::for_each(tokens.begin(),tokens.end(),Util::delete_fun<Token>());
		throw;
	}
}

#endif // !ASSIMP_BUILD_NO_FBX_IMPORTER