diff -r 57d4cdd99204 -r edfc90759b9f imageeditorengine/src/CJpegSave.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/imageeditorengine/src/CJpegSave.cpp Fri Jan 29 13:53:17 2010 +0200 @@ -0,0 +1,1009 @@ +/* +* Copyright (c) 2010 Ixonos Plc. +* All rights reserved. +* This component and the accompanying materials are made available +* under the terms of the "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: +* Ixonos Plc +* +* Description: +* +*/ + + +// +// Jpeg encoder class + +#include "CJpegSave.h" +#include +#include + +const TUint8 KZigZag[] = { + 0,8,1,2,9,16,24,17, + 10,3,4,11,18,25,32,40, + 33,26,19,12,5,6,13,20, + 27,34,41,48,56,49,42,35, + 28,21,14,7,15,22,29,36, + 43,50,57,58,51,44,37,30, + 23,31,38,45,52,59,60,53, + 46,39,47,54,61,62,55,63 + }; + + + +//Table K.1 from JPEG specification +const int jpeg_luma_quantizer[64] = { + 16, 11, 10, 16, 24, 40, 51, 61, + 12, 12, 14, 19, 26, 58, 60, 55, + 14, 13, 16, 24, 40, 57, 69, 56, + 14, 17, 22, 29, 51, 87, 80, 62, + 18, 22, 37, 56, 68, 109, 103, 77, + 24, 35, 55, 64, 81, 104, 113, 92, + 49, 64, 78, 87, 103, 121, 120, 101, + 72, 92, 95, 98, 112, 100, 103, 99 +}; + + +// Table K.2 from JPEG specification +const int jpeg_chroma_quantizer[64] = { + 17, 18, 24, 47, 99, 99, 99, 99, + 18, 21, 26, 66, 99, 99, 99, 99, + 24, 26, 56, 99, 99, 99, 99, 99, + 47, 66, 99, 99, 99, 99, 99, 99, + 99, 99, 99, 99, 99, 99, 99, 99, + 99, 99, 99, 99, 99, 99, 99, 99, + 99, 99, 99, 99, 99, 99, 99, 99, + 99, 99, 99, 99, 99, 99, 99, 99 +}; + + + +// Set up the standard Huffman tables (cf. JPEG standard section K.3) +// IMPORTANT: these are only valid for 8-bit data precision! + +const TUint8 bits_dc_luminance[17] = { 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0 }; +const TUint8 val_dc_luminance[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 }; +const TUint8 bits_dc_chrominance[17] = { 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 }; +const TUint8 val_dc_chrominance[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 }; + +const TUint8 bits_ac_luminance[17] = { 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d }; +const TUint8 val_ac_luminance[] = + { + 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, + 0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07, + 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08, + 0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0, + 0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16, + 0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28, + 0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, + 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, + 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, + 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, + 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, + 0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, + 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, + 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, + 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, + 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5, + 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4, + 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2, + 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, + 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, + 0xf9, 0xfa + }; + +const TUint8 bits_ac_chrominance[17] = { 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77 }; + +const TUint8 val_ac_chrominance[] = + { + 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21, + 0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71, + 0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91, + 0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0, + 0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34, + 0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26, + 0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38, + 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, + 0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, + 0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, + 0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, + 0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, + 0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, + 0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, + 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, + 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, + 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, + 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, + 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, + 0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, + 0xf9, 0xfa + }; + + +// Jpeg store huffman lookup +class TSHuffman + { + public: + TUint8 iLength[ 256 ]; + TInt8 iCode[ 256 ]; + }; + + + +CJpegSave* CJpegSave::NewL( RFs* aFs, RFile* aFile ) + { + CJpegSave* self = NewLC( aFs, aFile ); + CleanupStack::Pop( self ); + return self; + } + + + +CJpegSave* CJpegSave::NewLC( RFs* aFs, RFile* aFile ) + { + CJpegSave* self = new( ELeave )CJpegSave( aFs, aFile ); + CleanupStack::PushL( self ); + self->ConstructL(); + return self; + } + + + +CJpegSave::~CJpegSave() + { + delete iHuffman[ 0 ]; + delete iHuffman[ 1 ]; + delete iHuffman[ 2 ]; + delete iHuffman[ 3 ]; + delete iSaveBuf; + iFs = NULL; + iSaveFile = NULL; + iCurrentHuffman = NULL; + iCurrentQuant = NULL; + } + + + +CJpegSave::CJpegSave( RFs* aFs, RFile* aFile ) + : iFs( aFs ) + , iSaveFile( aFile ) + { + } + + + +void CJpegSave::ConstructL() + { + TSHuffman* huff = new( ELeave )TSHuffman; + CleanupStack::PushL(huff); + CreateHuffmanL( huff, bits_dc_luminance, val_dc_luminance ); + iHuffman[ 0 ] = huff; + CleanupStack::Pop(); + + huff = new( ELeave )TSHuffman; + CleanupStack::PushL(huff); + CreateHuffmanL( huff, bits_dc_chrominance, val_dc_chrominance ); + iHuffman[ 1 ] = huff; + CleanupStack::Pop(); + + huff = new( ELeave )TSHuffman; + CleanupStack::PushL(huff); + CreateHuffmanL( huff, bits_ac_luminance, val_ac_luminance ); + iHuffman[ 2 ] = huff; + CleanupStack::Pop(); + + huff = new( ELeave )TSHuffman; + CleanupStack::PushL(huff); + CreateHuffmanL( huff, bits_ac_chrominance, val_ac_chrominance ); + iHuffman[ 3 ] = huff; + CleanupStack::Pop(); + + iSaveByte = 0; + iSaveBufPos = 0; + iSaveBufBitPos = 0; + + } + + + +void CJpegSave::StartSaveL( const TSize& aSize, TPtr8 aExif, TInt aSaveBufferSize, TInt aQuality ) + { + iSaveBufSize = aSaveBufferSize; + if (iSaveBuf) + { + delete iSaveBuf; + iSaveBuf = NULL; + } + + iSaveBuf = new( ELeave )TUint8[ iSaveBufSize ]; + + // create quantization tables + MakeTables( aQuality, iYQuant, iUVQuant ); + + + TSize size = aSize; + TInt len; + + // D8 Start Of Image + + WriteSaveBuffer( (TUint16)0xffd8 ); + + + + // + // Exif ( if any ) + // + + if( aExif.Length() != 0 ) + { + WriteSaveBuffer( (TUint16) 0xffe1 ); + + TUint32 l = aExif.Length() + 6 + 2; // +header+tagsize + WriteSaveBuffer( (TUint16) l ); + + // exif header is 6 bytes ( 45 78 69 66 00 00 "Exif.." ) + WriteSaveBuffer( (TUint8) 0x45 ); + WriteSaveBuffer( (TUint8) 0x78 ); + WriteSaveBuffer( (TUint8) 0x69 ); + WriteSaveBuffer( (TUint8) 0x66 ); + WriteSaveBuffer( (TUint8) 0x00 ); + WriteSaveBuffer( (TUint8) 0x00 ); + + l -= ( 6+2 ); // minus header, minus tag size + + // save exif chunck + WriteSaveBuffer( aExif.Ptr(), l ); + } + else + { + // + // if no exif, standard application segment here + // + + // E0 jpeg application segment + WriteSaveBuffer( (TUint16)0xffe0 ); + + // segment length + WriteSaveBuffer( (TUint16)16 ); + + // 0x4a, 0x46, 0x49, 0x46, 0x00 JFIF #0 + WriteSaveBuffer( (TUint8) 0x4a ); + WriteSaveBuffer( (TUint8) 0x46 ); + WriteSaveBuffer( (TUint8) 0x49 ); + WriteSaveBuffer( (TUint8) 0x46 ); + WriteSaveBuffer( (TUint8) 0x00 ); + + WriteSaveBuffer( (TUint8) 0x01 ); // major revision number + WriteSaveBuffer( (TUint8) 0x01 ); // minor revision number + + // 0=aspect ratio, 1=dots/inch, 2=dots/cm + WriteSaveBuffer( (TUint8) 0x01 ); + + TInt dpi = 72; + // x dpi + WriteSaveBuffer( (TUint16) dpi ); + + // y dpi + WriteSaveBuffer( (TUint16) dpi ); + + // thumbnail width + WriteSaveBuffer( (TUint8) 0 ); + + // thumbnail height + WriteSaveBuffer( (TUint8) 0 ); + + + } + + + + // + // quant table + // + + TUint8 quant[ 2 ][ 64 ]; + + TInt i; + TInt n; + for( i=0; i<64; i++ ) + { + quant[ 0 ][ i ] = iYQuant[ i ]; + quant[ 1 ][ i ] = iUVQuant[ i ]; + } + + + for( n=0; n<2; n++ ) + { + WriteSaveBuffer( (TUint16) 0xffdb ); + + len = 2 + 1 * 65; + // chunk length + WriteSaveBuffer( (TUint16) len ); + + // quantization table # + WriteSaveBuffer( (TUint8) n ); + + // quantization table + WriteSaveBuffer( quant[ n ], 64 ); + } + + + + + + // + // Huffman Table + // + + const TUint8* nBits[ 4 ]; + const TUint8* values[ 4 ]; + + nBits[ 0 ] = bits_dc_luminance; + nBits[ 1 ] = bits_dc_chrominance; + nBits[ 2 ] = bits_ac_luminance; + nBits[ 3 ] = bits_ac_chrominance; + values[ 0 ] = val_dc_luminance; + values[ 1 ] = val_dc_chrominance; + values[ 2 ] = val_ac_luminance; + values[ 3 ] = val_ac_chrominance; + + + for( n=0; n<4; n++ ) + { + WriteSaveBuffer( (TUint16) 0xffc4 ); + + TInt numSymbols = 0; + for( i=0; i<16; i++ ) + { + TUint8 size = nBits[ n ][ i + 1 ]; + numSymbols += size; + } + + len = 2 + 1 + 16 + numSymbols; + // chunk length + WriteSaveBuffer( (TUint16) len ); + + // huffman table # + WriteSaveBuffer( (TUint8)( ( n / 2 ) * 16 + ( n & 1 ) ) ); + + // bit lengths for huffman table codes + for( i=0; i<16; i++ ) + { + TUint8 size = nBits[ n ][ i + 1 ]; + WriteSaveBuffer( size ); + } + + // huffman table symbols + WriteSaveBuffer( values[ n ], numSymbols ); + } + + + + + + // + // Start of frame + // + WriteSaveBuffer( (TUint16)0xffc0 ); + + len = 8 + 3 * 3; + // chunk length + WriteSaveBuffer( (TUint16)len ); + + // precision + WriteSaveBuffer( (TUint8)8 ); + + // image height + WriteSaveBuffer( (TUint16)size.iHeight ); + + // image width + WriteSaveBuffer( (TUint16)size.iWidth ); + + // number of components + WriteSaveBuffer( (TUint8)3 ); + + // component 0: + + WriteSaveBuffer( (TUint8)1 ); // number of component + WriteSaveBuffer( (TUint8) ( 1 + 16*2 ) ); // sampling factor + WriteSaveBuffer( (TUint8)0 ); // number of quantization table + + // component 1: + WriteSaveBuffer( (TUint8)2 ); // number of component + WriteSaveBuffer( (TUint8) ( 1 + 16*1 ) ); // sampling factor + WriteSaveBuffer( (TUint8)1 ); // number of quantization table + + // component 2: + WriteSaveBuffer( (TUint8)3 ); // number of component + WriteSaveBuffer( (TUint8) ( 1 + 16*1 ) ); // sampling factor + WriteSaveBuffer( (TUint8)1 ); // number of quantization table + + + // + // Start Of Scan ( SOS ) + // + WriteSaveBuffer( (TUint16)0xffda ); + + len = 3 + 3*2 + 3; + // chunk length + WriteSaveBuffer( (TUint16)len ); + + // number of components + WriteSaveBuffer( (TUint8)3 ); + + /// component1: + // component ID + WriteSaveBuffer( (TUint8)1 ); + // component huffman table ac(low4) dc(hi4) + WriteSaveBuffer( (TUint8)0 ); + + /// component2: + // component ID + WriteSaveBuffer( (TUint8)2 ); + // component huffman table ac(low4) dc(hi4) + WriteSaveBuffer( (TUint8)17 ); + + /// component3: + // component ID + WriteSaveBuffer( (TUint8)3 ); + // component huffman table ac(low4) dc(hi4) + WriteSaveBuffer( (TUint8)17 ); + + // stuffing ( actually dctsize-1 can be stored ) + WriteSaveBuffer( (TUint8)0 ); + WriteSaveBuffer( (TUint8)63 ); // dctsize - 1 + WriteSaveBuffer( (TUint8)0 ); + + iDy = 0; + iDu = 0; + iDv = 0; + } + + + +void CJpegSave::SaveBlock( const TBitmapHandle& aBitmap ) + { + // + // Macroblocks: + // + TInt by[ 256 ]; + TInt bu[ 64 ]; + TInt bv[ 64 ]; + TInt dct[ 64 ]; + + + Rgb2Yuv( (TUint32*)aBitmap.iData, aBitmap.iSize.iWidth, by, bu, bv ); + + iCurrentQuant = (TUint8*)iYQuant; + + Dct( by, dct ); + dct[ 0 ] -= iDy; + iDy += WriteDct( dct, iHuffman[ 0 ], iHuffman[ 2 ] ); + + Dct( by+64, dct ); + dct[ 0 ] -= iDy; + iDy += WriteDct( dct, iHuffman[ 0 ], iHuffman[ 2 ] ); + + iCurrentQuant = (TUint8*)iUVQuant; + Dct( bu, dct ); + dct[ 0 ] -= iDu; + iDu += WriteDct( dct, iHuffman[ 1 ], iHuffman[ 3 ] ); + + Dct( bv, dct ); + dct[ 0 ] -= iDv; + iDv += WriteDct( dct, iHuffman[ 1 ], iHuffman[ 3 ] ); + + } + + + +void CJpegSave::FinalizeSave() + { + + // + // End Of Image ( EOI ) + // + + // flush last bits to save buffer + if( iSaveBufBitPos ) + { + WriteBits( 0, 8-iSaveBufBitPos ); + } + + // end of image tag + WriteSaveBuffer( (TUint16)0xffd9 ); + + // there might still be stuff in save buffer + FlushSaveBuf(); + } + + +TPtrC8 CJpegSave::Finalize() + { + + // + // End Of Image ( EOI ) + // + + // flush last bits to save buffer + if( iSaveBufBitPos ) + { + WriteBits( 0, 8-iSaveBufBitPos ); + } + + // end of image tag + WriteSaveBuffer( (TUint16)0xffd9 ); + + return TPtrC8( iSaveBuf, iSaveBufPos ); + } + + + +void CJpegSave::WriteHuffman( TInt aValue ) + { + TInt code = iCurrentHuffman->iCode[ aValue ]; + TInt len = iCurrentHuffman->iLength[ aValue ]; + WriteBits( code, len ); + } + + + +void CJpegSave::CreateHuffmanL( TSHuffman* aHuffman, const TUint8* aBits, const TUint8* aVal ) + { + TInt huffSize[ 16 ]; + + TUint32 huffCode[ 256 ]; + TInt huffValue[ 256 ]; + TInt huffLength[ 256 ]; + + TInt numSymbols = 0; + TInt i; + + for( i=0; i<16; i++ ) + { + TInt size = aBits[ i+1 ]; + huffSize[ i ] = size; + numSymbols += size; + } + + for( i=0; iiLength[ v ] = huffLength[ i ]; + aHuffman->iCode[ v ] = huffCode[ i ]; + } + } + + + +void CJpegSave::WriteBits( TUint32 aValue, TInt aNumBits ) + { + + aValue &= ( ( 1 << aNumBits ) - 1 ); + while( aNumBits > 0 ) + { + TInt bitroom = 8 - iSaveBufBitPos; + iSaveByte |= ( ( aValue << ( 24+bitroom-aNumBits ) ) >> 24 ); + + if( aNumBits < bitroom ) + { + iSaveBufBitPos += aNumBits; + } + else + { + iSaveBufBitPos += bitroom; + } + + if( iSaveBufBitPos == 8 ) + { + iSaveBufBitPos = 0; + iSaveBuf[ iSaveBufPos ] = iSaveByte; + + if( iSaveByte == 255 ) + { + iSaveBufPos++; + if( iSaveBufPos == iSaveBufSize ) + { + FlushSaveBuf(); + } + iSaveBuf[ iSaveBufPos ] = 0; // 255,0 = 255 ( escaped 255 ) + } + iSaveByte = 0; + iSaveBufPos++; + + if( iSaveBufPos == iSaveBufSize ) + { + FlushSaveBuf(); + } + + } + aNumBits -= bitroom; + } + } + + + +TInt CJpegSave::WriteDct( TInt* aDct, TSHuffman* aDc, TSHuffman* aAc ) + { + TInt rv = 0; + TInt nullCount = 0; + bool theEnd = false; + + for( TInt i=0; i<64; i++ ) + { + if( i == 0 ) + { + iCurrentHuffman = aDc; + } + else + { + iCurrentHuffman = aAc; + } + + TInt value = aDct[ KZigZag[ i ] ] / iCurrentQuant[ i ]; + if( i==0 ) rv = value * iCurrentQuant[ 0 ]; + + bool doSave = true; + + if( i > 0 && value == 0 ) + { + + if( nullCount < 14 ) + { + nullCount++; + doSave = false; + } + else + { + value = 0; // end of block, too many zeros + nullCount = 0; + theEnd = true; + } + + } + + if( i == 63 && nullCount > 0 ) + { + doSave = true; + value = 0; + nullCount = 0; + theEnd = true; + } + + if( doSave ) + { + bool minus = false; + if( value < 0 ) + { + minus = true; + value = -value; + } + TInt v = value; + TInt vl = 0; + + while( v ) + { + v >>= 1; + vl++; + } + + if( minus ) + { + TInt a = ( 1 << vl ) - 1; + value ^= a; + } + + WriteHuffman( vl + nullCount * 16 ); + WriteBits( value, vl ); + if( theEnd ) // this is the end + { + break; + } + nullCount = 0; + } + } + return rv; + } + + + +void CJpegSave::Dct( TInt* aSrc, TInt* aTgt ) + { + const TInt w1 = 237; + const TInt w2 = 98; + const TInt w3 = 181; + const TInt w4 = 251; + const TInt w5 = 50; + const TInt w6 = 213; + const TInt w7 = 142; + + TInt s[8]; + TInt t[6]; + TInt r[4]; + + int j; + + + TInt* tp = aTgt; + + for( j=0; j<8; j++ ) + { + s[0] = aSrc[j + 0] + aSrc[j + 56]; + s[1] = aSrc[j + 8] + aSrc[j + 48]; + s[2] = aSrc[j + 16] + aSrc[j + 40]; + s[3] = aSrc[j + 24] + aSrc[j + 32]; + s[4] = aSrc[j + 24] - aSrc[j + 32]; + s[5] = aSrc[j + 16] - aSrc[j + 40]; + s[6] = aSrc[j + 8] - aSrc[j + 48]; + s[7] = aSrc[j + 0] - aSrc[j + 56]; + + t[0] = s[0] + s[3]; + t[1] = s[1] + s[2]; + t[2] = s[1] - s[2]; + t[3] = s[0] - s[3]; + t[4] = (s[6] - s[5]) * w3; + t[5] = (s[6] + s[5]) * w3; + + r[0] = s[4] * 256 + t[4]; + r[1] = s[4] * 256 - t[4]; + r[2] = s[7] * 256 - t[5]; + r[3] = s[7] * 256 + t[5]; + + *tp++ = (t[0] + t[1]) * w3 / 256; + *tp++ = (r[0] * w5 + r[3] * w4) / 256 / 256; + *tp++ = (t[2] * w2 + t[3] * w1) / 256; + *tp++ = (r[2] * w6 - r[1] * w7) / 256 / 256; + *tp++ = (t[0] - t[1]) * w3 / 256; + *tp++ = (r[1] * w6 + r[2] * w7) / 256 / 256; + *tp++ = (t[3] * w2 - t[2] * w1) / 256; + *tp++ = (r[3] * w5 - r[0] * w4) / 256 / 256; + } + + for( j=0; j<8; j++ ) + { + s[0] = aTgt[j + 0] + aTgt[j + 56]; + s[1] = aTgt[j + 8] + aTgt[j + 48]; + s[2] = aTgt[j + 16] + aTgt[j + 40]; + s[3] = aTgt[j + 24] + aTgt[j + 32]; + s[4] = aTgt[j + 24] - aTgt[j + 32]; + s[5] = aTgt[j + 16] - aTgt[j + 40]; + s[6] = aTgt[j + 8] - aTgt[j + 48]; + s[7] = aTgt[j + 0] - aTgt[j + 56]; + + t[0] = s[0] + s[3]; + t[1] = s[1] + s[2]; + t[2] = s[1] - s[2]; + t[3] = s[0] - s[3]; + t[4] = (s[6] - s[5]) * w3; + t[5] = (s[6] + s[5]) * w3; + + r[0] = s[4] * 256 + t[4]; + r[1] = s[4] * 256 - t[4]; + r[2] = s[7] * 256 - t[5]; + r[3] = s[7] * 256 + t[5]; + + aTgt[ 0 + j] = (t[0] + t[1]) * w3 / 256 / 4; + aTgt[32 + j] = (t[0] - t[1]) * w3 / 256 / 4; + aTgt[ 8 + j] = (r[0] * w5 + r[3] * w4) / 256 / 256 / 4; + aTgt[56 + j] = (r[3] * w5 - r[0] * w4) / 256 / 256 / 4; + aTgt[24 + j] = (r[2] * w6 - r[1] * w7) / 256 / 256 / 4; + aTgt[40 + j] = (r[1] * w6 + r[2] * w7) / 256 / 256 / 4; + aTgt[16 + j] = (t[2] * w2 + t[3] * w1) / 256 / 4; + aTgt[48 + j] = (t[3] * w2 - t[2] * w1) / 256 / 4; + } + + } + + + +void CJpegSave::Rgb2Yuv( TUint32* aRgb, TInt /*aWidth*/, TInt* aY, TInt* aU, TInt* aV ) + { + TInt pos = 0; + TInt yy; + TInt xx; + TInt y; + for( yy=0; yy<1; yy++ ) + for( xx=0; xx<2; xx++ ) + for( y=0; y<8; y++ ) + { + TInt cpos = xx*4 + y*8; + TInt x; + for( x=0; x<8; x++ ) + { + TUint32 c = aRgb[ x + xx*8 + y*16 + yy * 128 ]; + TInt r = ( c >> 16 ) & 0xff; + TInt g = ( c >> 8 ) & 0xff; + TInt b = c & 0xff; + + TInt cy = ( 19595*r + 38470*g + 7471*b ) >> 16; + //TInt cy = 0.29900*r + 0.58700*g + 0.11400*b; + //if( y<0 ) cy=0; + //if( y>255 ) cy=255; + aY[ pos++ ] = cy - 128; + + if( x & 1 ) + { + TInt t = ( ( -11059*r - 21710*g + 32768*b ) >> 16 ); + //TInt t = -0.16874*r - 0.33126*g + 0.50000*b + 128; + //if( t<-128 ) t=-128; + //if( t>127 ) t=127; + aU[ cpos ] = t; + + t = ( ( 32768*r - 27439*g - 5329*b ) >> 16 ); + //t = 0.50000*r - 0.41869*g - 0.08131*b + 128; + //if( t<-128 ) t=-128; + //if( t>127 ) t=127; + aV[ cpos++ ] = t; + } + } + } + + + // 1:1:1 macroblock version + /* + TUint32* p = aRgb; + TInt mod = ( aWidth - 8 ); + TInt pos = 0; + TInt y; + + for( y=0; y<8; y++ ) + { + TInt x; + for( x=0; x<8; x++ ) + { + TUint32 c = *p++; + TInt r = c >> 16; + TInt g = ( c >> 8 ) & 0xff; + TInt b = c & 0xff; + + TInt y = ( 19595*r + 38470*g + 7471*b ) >> 16; + //TInt y = 0.29900*r + 0.58700*g + 0.11400*b; + if( y<0 ) y=0; + if( y>255 ) y=255; + aY[ pos ] = y - 128; + + + TInt t = ( ( -11059*r - 21710*g + 32768*b ) >> 16 ); + //TInt t = -0.16874*r - 0.33126*g + 0.50000*b + 128; + if( t<-128 ) t=-128; + if( t>127 ) t=127; + aU[ pos ] = t; + + t = ( ( 32768*r - 27439*g - 5329*b ) >> 16 ); + //t = 0.50000*r - 0.41869*g - 0.08131*b + 128; + if( t<-128 ) t=-128; + if( t>127 ) t=127; + aV[ pos ] = t; + pos++; + } + p += mod; + } +*/ + + } + + + +void CJpegSave::MakeTables( TInt aQuality, TUint8* aY, TUint8* aUV ) + { + TInt i; + TInt factor = aQuality; + + if( aQuality < 1 ) factor = 1; + if( aQuality > 99 ) factor = 99; + if( aQuality < 50 ) + { + aQuality = 5000 / factor; + } + else + { + aQuality = 200 - factor*2; + } + + + for( i=0; i < 64; i++ ) + { + TInt y = ( jpeg_luma_quantizer[i] * aQuality + 50) / 100; + TInt uv = ( jpeg_chroma_quantizer[i] * aQuality + 50) / 100; + + if( y < 1) y = 1; + if( uv < 1) uv = 1; + if( y > 255) y = 255; + if( uv > 255) uv = 255; + + aY[ i ] = y; + aUV[ i ] = uv; + } + } + + + +void CJpegSave::WriteSaveBuffer( const TUint8* aSrc, TInt aBytes ) + { + TInt pos = 0; + while( aBytes ) + { + TInt bytes = aBytes; + if( iSaveBufPos + bytes > iSaveBufSize ) + { + bytes = iSaveBufSize - iSaveBufPos; + } + Mem::Copy( iSaveBuf + iSaveBufPos, aSrc + pos, bytes ); + iSaveBufPos += bytes; + if( iSaveBufPos == iSaveBufSize ) + { + FlushSaveBuf(); + } + aBytes -= bytes; + pos += bytes; + } + } + + + +void CJpegSave::WriteSaveBuffer( TUint8 aValue ) + { + iSaveBuf[ iSaveBufPos++ ] = aValue; + if( iSaveBufPos == iSaveBufSize ) + { + FlushSaveBuf(); + } + } + + + +void CJpegSave::WriteSaveBuffer( TUint16 aValue ) + { + WriteSaveBuffer( (TUint8) ( aValue / 256 ) ); + WriteSaveBuffer( (TUint8) ( aValue & 255 ) ); + } + + + +void CJpegSave::FlushSaveBuf() + { + if( &iSaveFile == NULL ) return; // no flushing without file + TPtr8 ptr( iSaveBuf, iSaveBufPos ); + ptr.SetLength( iSaveBufPos ); + if( iSaveFile )iSaveFile->Write( ptr ); + iSaveBufPos = 0; + } +