1 /*

     2 * Copyright (c) 2002 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:   YUV to EColor64K colorspace converter concrete classes 

    15 *

    16 */

    17 

    18 

    19 

    20 #ifndef     __YUV2RGB16_H__

    21 #define     __YUV2RGB16_H__

    22 

    23 //  INCLUDES

    24 

    25 #ifndef __YUVCONVERTER_H__

    26 #include "yuvconverter.h"

    27 #endif

    28 

    29 //  CLASS DEFINITIONS

    30 

    31 class CYuv2Rgb16 : public CYuvConverter

    32 {

    33 public: // CYuvConverter methods

    34     // Constructors & destructor

    35     CYuv2Rgb16();

    36     ~CYuv2Rgb16();

    37     void ConstructL(TUint aWidth, TUint aHeight, TUint aMaxWidth, TUint aMaxHeight);

    38     

    39     void Convert(const TUint8 *aYBuf, const TUint8 *aUBuf,

    40                  const TUint8 *aVBuf,

    41                  TUint aBufWidth, TUint aBufHeight,

    42                  TUint8 *aTarget, TUint aTargetScanlineLength);

    43 

    44     void SetGamma(TInt /*aGamma*/) {};

    45 

    46 protected: // Data

    47     

    48     TUint iWidth, iHeight;

    49     

    50 };

    51 

    52 

    53 // The fixed point constants for YUV -> RGB conversion

    54 const TInt KYMult = 296;

    55 const TInt KCrToR = 408;

    56 const TInt KCbToG =  96;

    57 const TInt KCrToG = 204;

    58 const TInt KCbToB = 520;

    59 

    60 // -----------------------------------------------------------------------------

    61 // UvToRDiff

    62 // Calculate the red color difference from Cr by using fixed point values.

    63 // -----------------------------------------------------------------------------

    64 //

    65 inline TInt UvToRDiff(

    66     TInt aCr,

    67     TInt /*aCb*/)

    68     {

    69     return (KCrToR * aCr) / 256;

    70     }

    71 

    72 // -----------------------------------------------------------------------------

    73 // UvToGDiff

    74 // Calculate the green color difference from Cr and Cb components

    75 // by using fixed point values.

    76 // -----------------------------------------------------------------------------

    77 //

    78 inline TInt UvToGDiff(

    79     TInt aCr,

    80     TInt aCb)

    81     {

    82     return (KCbToG * aCb + KCrToG * aCr) / 256;

    83     }

    84 

    85 // -----------------------------------------------------------------------------

    86 // UvToBDiff

    87 // Calculate the blue color difference from Cb by using fixed point values.

    88 // -----------------------------------------------------------------------------

    89 //

    90 inline TInt UvToBDiff(

    91     TInt /*aCr*/,

    92     TInt aCb)

    93     {

    94     return (KCbToB * aCb) / 256;

    95     }

    96 

    97 

    98 #endif