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1 /* |
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2 * Copyright (c) 2005-2006 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: YUV format transcoder. |
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15 * |
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16 */ |
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17 |
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18 |
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19 #include "vtyuvconverter.h" |
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20 |
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21 #ifdef _DEBUG |
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22 #include <e32debug.h> |
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23 #define PRINT RDebug::Print |
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24 #define _IFDBG(a) a |
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25 #else |
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26 #define PRINT |
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27 #define _IFDBG(a) |
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28 #endif |
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29 |
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30 // ======== MEMBER FUNCTIONS ======== |
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31 |
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32 // --------------------------------------------------------------------------- |
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33 // VtYuvConverter::ConvertFrom420PlanarTo422Interleaved |
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34 // --------------------------------------------------------------------------- |
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35 // |
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36 TInt VtYuvConverter::ConvertFrom420PlanarTo422Interleaved( |
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37 const TDesC8& aSource, |
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38 const TSize& aSize, |
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39 TDes8& aTarget, |
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40 TInt aStride ) |
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41 { |
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42 _IFDBG(PRINT( _L( "VtYuvConverter::ConvertFrom420PlanarTo422Interleaved<" ) )); |
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43 |
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44 if ( aTarget.MaxLength() < ByteSize422Interleaved( aSize ) ) |
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45 { |
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46 _IFDBG(PRINT( _L( "VtYuvConverter::ConvertFrom420PlanarTo422Interleaved> TargetMaxLength < ByteSize422" ) )); |
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47 return KErrUnderflow; |
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48 } |
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49 |
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50 if ( aSource.Size() != ByteSize420Planar( aSize ) ) |
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51 { |
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52 _IFDBG(PRINT( _L( "VtYuvConverter::ConvertFrom420PlanarTo422Interleaved> 420SourceSize != ByteSize420" ) )); |
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53 return KErrArgument; |
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54 } |
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55 |
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56 TInt planeSize( aSize.iWidth * aSize.iHeight ); |
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57 const TUint8* sy = aSource.Ptr(); |
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58 const TUint8* su = sy + planeSize; |
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59 const TUint8* sv = su + ( planeSize >> 2 ); |
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60 TUint8* t = const_cast< TUint8* >( aTarget.Ptr() ); |
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61 |
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62 TUint8* tsave = t; |
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63 for ( TInt y = ( aSize.iHeight >> 1 ) - 1; y >= 0; y-- ) |
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64 { |
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65 const TUint8* susave = su; |
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66 const TUint8* svsave = sv; |
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67 for ( TInt x = ( aSize.iWidth >> 1 ) - 1; x >= 0; x-- ) |
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68 { |
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69 *t++ = *su++; |
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70 *t++ = *sy++; |
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71 *t++ = *sv++; |
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72 *t++ = *sy++; |
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73 } |
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74 tsave = t = tsave + aStride; |
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75 su = susave; |
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76 sv = svsave; |
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77 for ( TInt x = ( aSize.iWidth >> 1 ) - 1; x >= 0; x-- ) |
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78 { |
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79 *t++ = *su++; |
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80 *t++ = *sy++; |
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81 *t++ = *sv++; |
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82 *t++ = *sy++; |
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83 } |
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84 tsave = t = tsave + aStride; |
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85 } |
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86 |
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87 _IFDBG(PRINT( _L( "VtYuvConverter::ConvertFrom420PlanarTo422Interleaved>" ) )); |
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88 return KErrNone; |
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89 } |
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90 |
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91 // --------------------------------------------------------------------------- |
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92 // VtYuvConverter::ByteSize420Planar |
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93 // --------------------------------------------------------------------------- |
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94 // |
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95 TInt VtYuvConverter::ByteSize420Planar( const TSize& aSizeInPixels ) |
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96 { |
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97 TInt planeSize( aSizeInPixels.iWidth * aSizeInPixels.iHeight ); |
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98 return planeSize + planeSize / 2; |
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99 } |
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100 |
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101 // --------------------------------------------------------------------------- |
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102 // VtYuvConverter::ByteSize422Interleaved |
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103 // --------------------------------------------------------------------------- |
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104 // |
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105 TInt VtYuvConverter::ByteSize422Interleaved( const TSize& aSizeInPixels ) |
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106 { |
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107 TInt planeSize( aSizeInPixels.iWidth * aSizeInPixels.iHeight ); |
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108 return planeSize * 2; |
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109 } |