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#ifndef __SWF_Support_hpp__
#define __SWF_Support_hpp__ 1
// =================================================================================================
// Copyright Adobe
// Copyright 2008 Adobe
// All Rights Reserved
//
// NOTICE: Adobe permits you to use, modify, and distribute this file in accordance with the terms
// of the Adobe license agreement accompanying it.
// =================================================================================================
#include "public/include/XMP_Environment.h" // ! XMP_Environment.h must be the first included header.
#include "public/include/XMP_Const.h"
#include "public/include/XMP_IO.hpp"
#include "XMPFiles/source/XMPFiles_Impl.hpp"
#include "third-party/zlib/zlib.h"
// =================================================================================================
namespace SWF_IO {
const XMP_Int64 MaxExpandedSize = 0xFFFFFFFFUL; // The file header has a UInt32 expanded size field.
const size_t HeaderPrefixSize = 8; // The uncompressed first part of the file header.
const size_t HeaderFixedSize = 12; // The fixed size part of the file header, omits the RECT.
const XMP_Uns32 CompressedSignature = 0x00535743; // The low 3 bytes are "SWC".
const XMP_Uns32 ExpandedSignature = 0x00535746; // The low 3 bytes are "SWF".
// Note: Can't use char* here, it causes duplicate symbols with xcode.
const XMP_Uns16 FileAttributesTagID = 69;
const XMP_Uns16 MetadataTagID = 77;
const XMP_Uns8 TagLengthMask = 0x3F;
const XMP_Uns8 HasMetadataMask = 0x10;
// A SWF file begins with a variable length header. The header layout is:
//
// UInt8[3] - "FWS" for uncompressed SWF and "CWS" for compressed SWF
// UInt8 - SWF format version
// UInt32 - Length of uncompressed file, little endian
// RECT - packed bit RECT structure
// UInt16 - frame rate, little endian, really 8.8 fixed point
// UInt16 - frame count, little endian
//
// If the first 4 bytes are read as a little endian UInt32 they become "vSWC" and "vSWF", where
// the "v" byte is the version format version.
//
// SWF compression starts 8 bytes into the file, after the length field in the header.
// The length in the header is everything. If compressed this is 8 plus the decompressed size.
//
// Following the header is a sequence of tags. Each tag begins with a little endian UInt16 whose
// upper 10 bits are the tag ID and lower 6 bits are a length for the content. If this length is
// 63 (0x3F) then a little endian Int32 follows with the content length.
//
// The FileAttributes tag, #69, has a flag byte and 3 reserved bytes following the header. There
// is only 1 flag bit that we care about, HasMetadata with the mask 0x10.
//
// The Metadata tag, #77, has content that is the UTF-8 XMP, preferably as small as possible.
XMP_Uns32 FileHeaderSize ( XMP_Uns8 rectBits );
class TagInfo {
public:
bool hasLongHeader;
XMP_Uns16 tagID;
XMP_Uns32 tagOffset, contentLength;
TagInfo() : hasLongHeader(false), tagID(0), tagOffset(0), contentLength(0) {};
~TagInfo() {};
};
bool GetTagInfo ( const RawDataBlock & swfStream, XMP_Uns32 tagOffset, TagInfo * info );
XMP_Uns32 FullTagLength ( const TagInfo & info );
XMP_Uns32 ContentOffset ( const TagInfo & info );
XMP_Uns32 NextTagOffset ( const TagInfo & info );
XMP_Int64 DecompressFileToMemory ( XMP_IO * fileIn, RawDataBlock * dataOut );
XMP_Int64 CompressMemoryToFile ( const RawDataBlock & dataIn, XMP_IO* fileOut );
}; // SWF_IO
#endif // __SWF_Support_hpp__
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