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1 /* |
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2 * Copyright (c) 2010 ISB. |
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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 "Symbian Foundation 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.symbianfoundation.org/legal/sfl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * ISB - Initial contribution |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: |
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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 #ifndef WEBCAMERACONVERT_H__ |
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20 #include "webcamer_convert.h" |
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21 #endif |
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22 |
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23 #define DP(format...) Kern::Printf(format) |
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24 |
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25 /** |
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26 Constructor. |
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27 */ |
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28 DWebCameraConvert::DWebCameraConvert(TWebcameraUVC* aUvcFormat) |
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29 { |
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30 TUint32 wGuid = aUvcFormat->iUVCDescriptor.iFormatDescriptor.iGuid.iData1; |
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31 switch (wGuid) |
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32 { |
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33 case KWebcameraYuy2: |
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34 //Create object of DWebCameraConvertYuv. |
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35 iConvertObject = new(ELeave) DWebCameraConvertYuv(aUvcFormat); |
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36 break; |
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37 default: |
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38 break; |
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39 } |
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40 } |
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41 |
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42 /** |
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43 Destructor. |
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44 */ |
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45 DWebCameraConvert::~DWebCameraConvert() |
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46 { |
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47 delete iConvertObject; |
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48 } |
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49 |
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50 TInt DWebCameraConvert::ConvertData(TUint8* aInBuf, TUint8* aOutBuf) |
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51 { |
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52 return iConvertObject->ConvertData(aInBuf, aOutBuf); |
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53 } |
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54 |
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55 /** |
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56 Constructor. |
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57 */ |
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58 DWebCameraConvertBase::DWebCameraConvertBase(TWebcameraUVC* aUvcFormat) |
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59 :iUvcFormat(aUvcFormat) |
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60 { |
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61 } |
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62 |
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63 /** |
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64 Destructor. |
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65 */ |
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66 DWebCameraConvertBase::~DWebCameraConvertBase() |
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67 { |
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68 } |
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69 |
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70 /** |
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71 Convert FrameData to BitmapData. |
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72 |
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73 @param aInBuf [in] Data to convert. |
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74 aOutBuf [out] BitmapData after conversion. |
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75 @return KErrNotSupported. Implement in sub-class, return unsupport in base-class. |
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76 */ |
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77 TInt DWebCameraConvertBase::ConvertData(TUint8* /*aInBuf*/, TUint8* /*aOutBuf*/) |
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78 { |
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79 return KErrNotSupported; |
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80 } |
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81 |
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82 /** |
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83 Constructor. |
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84 */ |
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85 DWebCameraConvertYuv::DWebCameraConvertYuv(TWebcameraUVC* aUvcFormat) |
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86 :DWebCameraConvertBase(aUvcFormat) |
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87 { |
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88 } |
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89 |
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90 /** |
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91 Destructor. |
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92 */ |
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93 DWebCameraConvertYuv::~DWebCameraConvertYuv() |
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94 { |
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95 } |
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96 |
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97 /** |
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98 Convert FrameData to BitmapData(yuv->Bitmap). |
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99 |
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100 @param aInBuf [in] Data to convert. |
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101 aOutBuf [out] BitmapData after conversion. |
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102 @return KErrNone. |
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103 */ |
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104 TInt DWebCameraConvertYuv::ConvertData(TUint8* aInBuf, TUint8* aOutBuf) |
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105 { |
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106 TUint wInPos = 0; //Declaration to get FrameData before conversion. |
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107 TUint wOutPos = 0; //Declaration to store BitmapData after conversion. |
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108 TUint wPixel32 = 0; //Declaration to store data(1pixel32bit) after conversion from yuv to rgb. |
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109 TInt wY0, wU, wY1, wV; //Declaration to store signal that get from rgb. |
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110 TUint16 wWidth, wHeight; //Declaration to store width and height from argument aVideoData. |
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111 |
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112 wWidth = iUvcFormat->iUVCDescriptor.iFrameDescriptor.iWidth; //Store width information from aVideoData. |
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113 wHeight = iUvcFormat->iUVCDescriptor.iFrameDescriptor.iHeight; //Store height information from aVideoData. |
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114 |
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115 TUint wImageSize = wWidth * wHeight * 2; |
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116 |
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117 //Get width and heigth data. |
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118 for (wInPos = 0; wInPos < wImageSize; wInPos += 4) |
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119 { |
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120 //Y16-bit to suitable location of YUYV. |
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121 wY0 = (static_cast<TUint>(aInBuf[wInPos + 0]) & KWebcameraBitMask); |
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122 wU = (static_cast<TUint>(aInBuf[wInPos + 1]) & KWebcameraBitMask); |
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123 wY1 = (static_cast<TUint>(aInBuf[wInPos + 2]) & KWebcameraBitMask); |
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124 wV = (static_cast<TUint>(aInBuf[wInPos + 3]) & KWebcameraBitMask); |
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125 |
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126 //Store RGB by wPixel32 format, that was converted from yuv. |
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127 wPixel32 = ConvertYuvToBitmap(wY0, wU, wV); |
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128 //Calculate element of RGB from wPixel32. |
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129 aOutBuf[wOutPos++] = (wPixel32 & KWebcameraBitMask); |
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130 aOutBuf[wOutPos++] = (wPixel32 & KWebcameraBitMask8) >> 8; |
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131 aOutBuf[wOutPos++] = (wPixel32 & KWebcameraBitMask16) >> 16; |
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132 |
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133 //Store RGB by wPixel32 format, that was converetd from yuv. |
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134 wPixel32 = ConvertYuvToBitmap(wY1, wU, wV); |
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135 aOutBuf[wOutPos++] = (wPixel32 & KWebcameraBitMask); |
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136 aOutBuf[wOutPos++] = (wPixel32 & KWebcameraBitMask8) >> 8; |
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137 aOutBuf[wOutPos++] = (wPixel32 & KWebcameraBitMask16) >> 16; |
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138 } |
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139 |
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140 return KErrNone; |
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141 } |
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142 |
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143 /** |
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144 Convert yuv to rgb. |
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145 |
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146 @param aY [in] Signal of brightness. |
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147 aU [in] Signal of colour difference(Cb) |
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148 aV [in] Signal of colour difference(Cr). |
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149 @return pixel. |
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150 */ |
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151 TInt DWebCameraConvertYuv::ConvertYuvToBitmap(TInt aY, TInt aU, TInt aV) |
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152 { |
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153 TUint wPixel32 = 0; //Declaration to use still image of wPixel32 format. |
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154 TUint8* wPixel = static_cast<TUint8*>&wPixel32; //Cast still image of wPixel32 format to 8bit to convert. |
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155 TInt wR = 0; //Declaration to store still image after conversion. |
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156 TInt wG = 0; |
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157 TInt wB = 0; |
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158 |
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159 //Convert yuv to rgb. |
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160 wR = aY + ((1370705 * (aV - 128)) / 1000000); |
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161 wG = aY - ((698001 * (aV - 128)) / 1000000) - ((337633 * (aU - 128)) / 1000000); |
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162 wB = aY + ((1732446 * (aU - 128)) / 1000000); |
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163 |
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164 //Define the range of RGB(0~255). |
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165 if (!(0 <= wR && wR <= 255)) |
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166 { |
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167 (wR > 255) ? (wR = 255) : (wR = 0); |
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168 } |
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169 if (!(0 <= wG && wG <= 255)) |
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170 { |
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171 (wG > 255) ? (wG = 255) : (wG = 0); |
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172 } |
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173 if (!(0 <= wB && wB <= 255)) |
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174 { |
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175 (wB > 255) ? (wB = 255) : (wB = 0); |
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176 } |
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177 |
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178 //Compress RGB. |
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179 wPixel[0] = (wB * KWebcameraNeutralGrayValue) / KWebcameraColorGradation; |
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180 wPixel[1] = (wG * KWebcameraNeutralGrayValue) / KWebcameraColorGradation; |
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181 wPixel[2] = (wR * KWebcameraNeutralGrayValue) / KWebcameraColorGradation; |
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182 |
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183 return wPixel32; |
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184 } |