1 /* |
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2 * Copyright (c) 2010 Ixonos Plc. |
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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 the "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 * Ixonos Plc |
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14 * |
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15 * Description: |
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16 * Resampling framework for YUV 4.2.0. |
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17 * |
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18 */ |
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19 |
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20 |
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21 |
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22 #ifndef CTRSCALER_H |
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23 #define CTRSCALER_H |
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24 |
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25 |
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26 // INCLUDES |
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27 #include <e32base.h> |
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28 #include "ctrcommon.h" |
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29 |
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30 |
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31 // Scaler operations |
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32 enum EResamplingOpereation |
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33 { |
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34 EOperationNone, |
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35 EDoubleSize, // Resize to 200% |
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36 EUpSampling, // Resize to 101% or more |
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37 EOperationCopy, // No resize (100%) |
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38 EOperationCopyWithBB, // No resize, add black borders |
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39 EDownSampling, // Resize to 99% or less |
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40 EHalveSize, // Resize to 50% |
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41 EUpDownSampling // Resize with strech |
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42 }; |
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43 |
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44 // Scaler class, supports resampling operations with YUV 4.2.0 format; |
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45 NONSHARABLE_CLASS(CTRScaler) : public CBase |
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46 { |
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47 public: |
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48 static CTRScaler* NewL(); |
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49 |
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50 // Destructor |
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51 ~CTRScaler(); |
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52 |
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53 public: |
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54 void Scale(); |
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55 |
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56 // Sets operations |
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57 void SetScalerOptionsL( TPtr8& aSrc, TPtr8& aTrg, TSize& aSrcSize, TSize& aTrgSize ); |
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58 |
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59 // Checks if aspect ratio is wide |
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60 TBool IsWideAspectRatio(TSize aSize); |
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61 |
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62 // Calculates intermediate resolution for use with black boxing |
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63 TBool GetIntermediateResolution(TSize aSrcSize, TSize aTrgSize, TSize& aTargetResolution, TSize& aBlackBoxing); |
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64 |
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65 // Returns a time estimate of how long it takes to resample a frame |
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66 TReal EstimateResampleFrameTime(const TTRVideoFormat& aInput, const TTRVideoFormat& aOutput); |
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67 |
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68 private: |
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69 CTRScaler(); |
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70 |
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71 // Second phase constructor |
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72 void ConstructL(); |
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73 |
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74 // Resampling operations |
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75 void ResampleBilinear(TSize& aSrcSize, TSize& aTrgSize, TSize& aBlackBoxing); |
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76 void ResampleHalve(TSize& aSrcSize, TSize& aTrgSize, TSize& aBlackBoxing); |
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77 void ResampleDouble(TSize& aSrcSize, TSize& aTrgSize); |
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78 |
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79 // Called when resizing to less than 50% of the original size |
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80 void DoHalveAndBilinearResampleL(); |
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81 |
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82 // No resampling, copy frame and add black borders. |
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83 void CopyWithBlackBoxing(TSize& aSrcSize, TSize& aTrgSize, TSize& aBlackBoxing); |
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84 |
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85 private: |
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86 // Source buffer |
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87 TUint8* iSrc; |
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88 |
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89 // Destination buffer |
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90 TUint8* iTrg; |
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91 |
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92 // Source resolution |
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93 TSize iSrcSize; |
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94 |
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95 // Target resolution |
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96 TSize iTrgSize; |
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97 |
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98 // Resampling operation |
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99 TInt iOperation; |
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100 |
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101 // Trg data size |
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102 TUint iTrgDataSize; |
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103 |
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104 // Initial src ptr |
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105 TUint8* iSrcInit; |
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106 |
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107 // Initial trg ptr |
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108 TUint8* iTrgInit; |
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109 |
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110 // Scale X |
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111 TInt iScaleXInt; |
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112 |
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113 // Scale Y |
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114 TInt iScaleYInt; |
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115 |
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116 TPtr8* iTrgBuffer; |
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117 |
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118 // For storing width/height of black border area |
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119 TSize iBlackBoxing; |
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120 |
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121 }; |
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122 |
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123 |
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124 |
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125 |
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126 #endif |
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