1 /*

     2 * Copyright (c) 2010 Ixonos Plc.

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of the "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 * Ixonos Plc

    14 *

    15 * Description:  

    16 * YUV to EColor64K colorspace converter concrete classes. 

    17 *

    18 */

    19 

    20 

    21 #ifndef     __YUV2RGB16_H__

    22 #define     __YUV2RGB16_H__

    23 

    24 //  INCLUDES

    25 

    26 #ifndef __YUVCONVERTER_H__

    27 #include "yuvconverter.h"

    28 #endif

    29 

    30 //  CLASS DEFINITIONS

    31 

    32 class CYuv2Rgb16 : public CYuvConverter

    33 {

    34 public: // CYuvConverter methods

    35     // Constructors & destructor

    36     CYuv2Rgb16();

    37     ~CYuv2Rgb16();

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

    39     

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

    41                  const TUint8 *aVBuf,

    42                  TUint aBufWidth, TUint aBufHeight,

    43                  TUint8 *aTarget, TUint aTargetScanlineLength);

    44 

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

    46 

    47 protected: // Data

    48     

    49     TUint iWidth, iHeight;

    50     

    51 };

    52 

    53 

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

    55 const TInt KYMult = 296;

    56 const TInt KCrToR = 408;

    57 const TInt KCbToG =  96;

    58 const TInt KCrToG = 204;

    59 const TInt KCbToB = 520;

    60 

    61 // -----------------------------------------------------------------------------

    62 // UvToRDiff

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

    64 // -----------------------------------------------------------------------------

    65 //

    66 inline TInt UvToRDiff(

    67     TInt aCr,

    68     TInt /*aCb*/)

    69     {

    70     return (KCrToR * aCr) / 256;

    71     }

    72 

    73 // -----------------------------------------------------------------------------

    74 // UvToGDiff

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

    76 // by using fixed point values.

    77 // -----------------------------------------------------------------------------

    78 //

    79 inline TInt UvToGDiff(

    80     TInt aCr,

    81     TInt aCb)

    82     {

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

    84     }

    85 

    86 // -----------------------------------------------------------------------------

    87 // UvToBDiff

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

    89 // -----------------------------------------------------------------------------

    90 //

    91 inline TInt UvToBDiff(

    92     TInt /*aCr*/,

    93     TInt aCb)

    94     {

    95     return (KCbToB * aCb) / 256;

    96     }

    97 

    98 

    99 #endif