--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mmplugins/imagingplugins/codecs/JPEGCodec/JpegConsts.h	Tue Feb 02 01:56:55 2010 +0200
@@ -0,0 +1,134 @@
+// Copyright (c) 1999-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+//
+
+#ifndef __JPEGCONSTS_H__
+#define __JPEGCONSTS_H__
+
+	
+// Constants.
+const TUint16 KJpgMarker = 0xff00;
+const TUint16 KJpgMarkerMask = 0xff00;
+const TUint16 KJpgSOISignature = 0xffd8;
+const TUint16 KJpgApp0Signature = 0xffe0;
+const TUint16 KJpgApp1Signature = 0xffe1;
+const TUint16 KJpgAppESignature = 0xffee;
+const TUint16 KJpgDHTSignature = 0xffc4;
+const TUint16 KJpgDQTSignature = 0xffdb;
+const TUint16 KJpgBaselineDCTSOFSignature = 0xffc0;
+const TUint16 KJpgExtendedDCTSOFSignature = 0xffc1;
+const TUint16 KJpgProgressiveDCTSOFSignature = 0xffc2;
+const TUint16 KJpgLosslessDCTSOFSignature = 0xffc3;
+const TUint16 KJpgSOSSignature = 0xffda;
+const TUint16 KJpgRestartIntervalSignature = 0xffdd;
+const TUint16 KJpgEOISignature = 0xffd9;
+const TUint16 KJpgCommentSignature = 0xfffe;
+const TUint16 KJpgAppSignatureMask = 0xfff0;
+const TInt KJpgPixelRatio = 1;
+const TUint8  KJpgMarkerByte = ( KJpgMarker >> 8 );
+
+const TInt KJpgHuffmanLookAhead = 8;
+const TInt KJpgHuffmanMaxCodeSize = 16;
+const TUint32 KJpgHuffmanLookAheadMask = (1<<KJpgHuffmanLookAhead)-1;
+
+_LIT8(KJfifId,"JFIF");
+_LIT8(KJfifExtId,"JFXX");
+_LIT8(KAdobeId,"Adobe");
+const TInt KJpgApp0IdSize = 4;
+const TInt KJpgAppEIdSize = 5;
+
+const TUint16 KJfifVersion0100 = 0x0100;
+const TUint16 KJfifVersion0101 = 0x0101;
+const TUint16 KJfifVersion0102 = 0x0102;
+
+const TInt KAdobeColorTransformYCbCr = 1;
+const TInt KAdobeColorTransformRGB = 0;
+
+const TInt KJfifInitialHeaderSize = 6;
+const TInt KJfifApp0DataSize = 16;
+const TInt KJfifHeaderBlockSizeInBytes = 4096;
+const TInt KJfifDataBlockSizeInBytes = 1024*8; // 8K
+const TInt KJfifLengthOffset = 4;
+const TInt KJfifThumbnailXYOffset = 18;
+
+const TInt KJpgNumberOfComponents = 3;
+const TInt KJpgMinNumberOfComponents = 1;
+const TInt KJpgMaxNumberOfTables = 4;
+const TInt KJpgHuffmanTableBitsSize = 16;
+const TInt KJpgHuffmanTableSize = 256;
+const TInt KJpgDCTBlockWidth = 8;
+const TInt KJpgDCTBlockHeight = 8;
+const TInt KJpgDCTBlockSize = 64;
+const TInt KJpgMinSampleFactor = 1;
+const TInt KJpgMaxSampleFactor = 4;
+const TInt KJpgZeroRunValue = 0xf0;
+const TInt KJpgMaxNumOfDataUnits = 6;
+const TInt KJpgMonochromeDataUnitCount = 1;
+const TInt KJpgEColor444DataUnitCount = 3;
+const TInt KJpgColor422DataUnitCount = 4;
+const TInt KJpgColor420DataUnitCount = 6;
+
+const TUint KRotation90DegreesClockwise = 0x01;
+const TUint KRotation180DegreesClockwise = 0x02;
+const TUint KRotation270DegreesClockwise = 0x04;
+const TUint KMirrorHorizontalAxis = 0x08;
+const TUint KMirrorVerticalAxis = 0x10;
+
+const TUint KJpgEncoderCapabilities = 0x1F;
+
+class TAlignedZigZag
+    {
+public:
+    union 
+        {
+        TUint8  iZigZag[KJpgDCTBlockSize];
+        TUint64 iAligment;    
+        };
+    };
+
+extern const TAlignedZigZag KZigZagSequence;
+	
+const TUint KJPEGInterchangeFormat = 0x0201;
+const TUint KJPEGInterchangeFormatLength = 0x0202;
+
+const TInt KYComp = 0;	// index of Y component
+const TInt KUComp = 1;	// index of U component
+const TInt KVComp = 2;	// index of V component
+
+/**
+Capabilities for different color sampling schemes.
+*/
+const TInt KSamplingMonoMCUWidthInPixels = 8;
+const TInt KSamplingMonoMCUHeightInPixels = 8;
+/**
+The optimal input pixel buffer width was calculated emprically by determining the average number of compressed MCUs that can fit in the 4096(KMaxDstBufferSize) encoded 
+destination buffer provided by framework.
+The calculation is roughly: (KMaxDstBufferSize) / (Size of Image in bytes/(MCU count x * MCU count y))
+*/
+
+const TInt KSampling422MCUWidthInPixels = 16;
+const TInt KSampling422MCUHeightInPixels = 8;
+
+const TInt KSampling420MCUWidthInPixels = 16;
+const TInt KSampling420MCUHeightInPixels = 16;
+
+const TInt KOptimalBlockSize = 256;
+
+#if defined(__ARMCC__)
+#define FORCEDINLINE __forceinline
+#else
+#define FORCEDINLINE inline
+#endif
+
+#endif // __JPEGCONSTS_H__