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 * |
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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 #include "ProcWAVFrameHandler.h" |
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23 #include "ProcFrameHandler.h" |
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24 #include "ProcTools.h" |
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25 #include "ProcConstants.h" |
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26 |
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27 #include <f32file.h> |
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28 #include <e32math.h> |
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29 |
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30 |
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31 TBool CProcWAVFrameHandler::ManipulateGainL(const HBufC8* aFrameIn, HBufC8*& aFrameOut, TInt8 aGain) |
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32 { |
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33 TInt a = 0; |
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34 |
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35 aFrameOut = HBufC8::NewLC(aFrameIn->Size()); |
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36 |
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37 aFrameOut->Des().Copy(aFrameIn->Ptr(), aFrameIn->Size()); |
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38 |
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39 aGain = static_cast<TInt8>(aGain / 2); |
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40 |
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41 TPtr8 framePtr(aFrameOut->Des()); |
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42 if (iBitsPerSample == 8) |
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43 { |
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44 |
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45 TReal multiplier = 0; |
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46 TReal gaR(aGain); |
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47 TReal exp = gaR/20; |
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48 Math::Pow(multiplier, 10, exp); |
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49 |
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50 for (a = 0 ; a < aFrameOut->Length() ; a++) |
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51 { |
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52 TInt oldGain = (*aFrameOut)[a]-128; |
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53 TInt newGain = 0; |
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54 |
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55 newGain = static_cast<TInt>(oldGain * multiplier); |
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56 |
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57 if (newGain > 128) |
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58 { |
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59 newGain = 128; |
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60 } |
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61 else if (newGain < -128) |
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62 { |
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63 newGain = -128; |
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64 } |
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65 |
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66 framePtr[a] = static_cast<TUint8>(newGain+128); |
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67 |
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68 } |
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69 } |
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70 else if (iBitsPerSample == 16) |
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71 { |
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72 |
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73 TReal multiplier = 0; |
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74 TReal gaR(aGain); |
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75 TReal exp = gaR/20; |
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76 Math::Pow(multiplier, 10, exp); |
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77 |
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78 |
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79 for (a = 0 ; a < aFrameOut->Length()-1 ; a += 2) |
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80 { |
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81 |
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82 TUint16 oldGain = static_cast<TUint16>((*aFrameOut)[a+1]*256 + (*aFrameOut)[a]); |
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83 |
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84 TBool negative = EFalse; |
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85 |
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86 if (oldGain > 32767) |
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87 { |
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88 oldGain = static_cast<TUint16>(~oldGain+1);// - 65793; |
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89 negative = ETrue; |
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90 } |
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91 |
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92 TUint16 newGain = static_cast<TUint16>(oldGain * multiplier); |
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93 |
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94 if (newGain > 32727) |
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95 { |
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96 newGain = 32727; |
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97 } |
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98 |
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99 |
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100 if (negative) |
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101 { |
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102 newGain = static_cast<TUint16>(~newGain-1);// - 65793; |
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103 |
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104 } |
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105 framePtr[a+1] = static_cast<TUint8>(newGain/256); |
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106 framePtr[a] = static_cast<TUint8>(newGain%256); |
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107 |
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108 |
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109 |
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110 } |
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111 |
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112 } |
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113 |
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114 |
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115 CleanupStack::Pop(); // aFrameOut |
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116 return ETrue; |
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117 } |
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118 |
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119 TBool CProcWAVFrameHandler::GetGainL(const HBufC8* aFrame, RArray<TInt>& aGains, TInt& aMaxGain) const |
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120 { |
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121 |
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122 TInt a = 0; |
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123 |
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124 TInt highest = 0; |
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125 |
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126 if (iBitsPerSample == 8) |
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127 { |
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128 |
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129 for (a = 0 ; a < aFrame->Length() ; a++) |
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130 { |
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131 |
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132 |
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133 if (Abs((*aFrame)[a]-128) > highest) |
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134 highest = Abs((*aFrame)[a]-128); |
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135 |
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136 } |
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137 } |
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138 else if (iBitsPerSample == 16) |
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139 { |
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140 |
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141 for (a = 0 ; a < aFrame->Length()-1 ; a += 2) |
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142 { |
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143 TInt ga = ((*aFrame)[a+1]*256 + (*aFrame)[a]); |
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144 |
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145 if (ga > 32767) ga-= 65792; |
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146 |
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147 |
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148 |
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149 if (ga > highest) highest = ga; |
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150 |
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151 |
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152 } |
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153 |
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154 } |
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155 |
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156 |
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157 aGains.Append(highest); |
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158 |
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159 if (iBitsPerSample == 8) aMaxGain = 128; |
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160 else if (iBitsPerSample == 16) aMaxGain = 32767; |
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161 |
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162 |
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163 return ETrue; |
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164 } |
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165 |
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166 |
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167 TBool CProcWAVFrameHandler::GetNormalizingMargin(const HBufC8* aFrame, TInt8& aMargin) const |
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168 |
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169 { |
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170 |
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171 |
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172 TInt maxGain = 0; |
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173 TInt highestGain = GetHighestGain(aFrame, maxGain); |
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174 |
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175 |
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176 TInt ma = ((maxGain - highestGain)*2)/5; |
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177 aMargin = static_cast<TInt8>(ma); |
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178 |
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179 return ETrue; |
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180 |
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181 |
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182 } |
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183 |
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184 TBool CProcWAVFrameHandler::IsMixingAvailable() const |
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185 { |
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186 return ETrue; |
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187 } |
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188 TBool CProcWAVFrameHandler::MixL(const HBufC8* aFrame1, const HBufC8* aFrame2, HBufC8*& aMixedFrame) |
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189 { |
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190 |
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191 if (aFrame1->Length() != aFrame2->Length()) |
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192 { |
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193 aMixedFrame = 0; |
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194 return EFalse; |
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195 } |
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196 |
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197 aMixedFrame = HBufC8::NewL(aFrame1->Length()); |
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198 |
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199 TInt a = 0; |
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200 TInt newGain = 0; |
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201 |
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202 if (iBitsPerSample == 8) |
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203 { |
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204 |
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205 for (a = 0 ; a < aFrame1->Length() ; a++) |
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206 { |
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207 |
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208 TInt oldGain1 = (*aFrame1)[a]-128; |
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209 TInt oldGain2 = (*aFrame2)[a]-128; |
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210 |
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211 newGain = oldGain1 + oldGain2; |
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212 |
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213 if (newGain > 128) |
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214 { |
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215 newGain = 128; |
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216 } |
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217 else if (newGain < -128) |
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218 { |
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219 newGain = -128; |
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220 } |
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221 |
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222 aMixedFrame->Des().Append(static_cast<TUint8>(newGain+128)); |
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223 |
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224 } |
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225 } |
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226 else if (iBitsPerSample == 16) |
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227 { |
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228 |
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229 |
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230 for (a = 0 ; a < aFrame1->Length()-1 ; a += 2) |
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231 { |
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232 |
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233 TUint16 oldGain1 = static_cast<TUint16>((*aFrame1)[a+1]*256 + (*aFrame1)[a]); |
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234 TUint16 oldGain2 = static_cast<TUint16>((*aFrame2)[a+1]*256 + (*aFrame2)[a]); |
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235 |
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236 |
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237 TBool negative1 = EFalse; |
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238 TBool negative2 = EFalse; |
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239 |
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240 if (oldGain1 > 32767) |
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241 { |
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242 //oldGain1 = ~oldGain1+1;// - 65793; |
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243 negative1 = ETrue; |
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244 // oldGain1 = oldGain1+((65536-oldGain1)/2); |
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245 |
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246 } |
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247 else |
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248 { |
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249 |
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250 // oldGain1 /= 2; |
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251 |
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252 } |
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253 |
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254 if (oldGain2 > 32767) |
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255 { |
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256 //oldGain2 = ~oldGain2+1;// - 65793; |
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257 negative2 = ETrue; |
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258 // oldGain2 = oldGain2+((65536-oldGain2)/2); |
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259 |
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260 } |
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261 else |
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262 { |
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263 // oldGain2 /= 2; |
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264 } |
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265 |
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266 |
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267 newGain = static_cast<TUint16>(oldGain1 + oldGain2); |
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268 |
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269 |
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270 if (negative1 && negative2) |
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271 { |
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272 if (newGain < 32767) |
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273 { |
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274 newGain = 32768; |
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275 } |
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276 } |
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277 else if (!negative1 && !negative2) |
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278 { |
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279 if (newGain > 32767) |
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280 { |
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281 newGain = 32767; |
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282 } |
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283 |
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284 } |
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285 |
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286 |
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287 aMixedFrame->Des().Append(static_cast<TUint8>(newGain%256)); |
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288 aMixedFrame->Des().Append(static_cast<TUint8>(newGain/256)); |
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289 |
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290 } |
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291 |
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292 } |
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293 |
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294 return ETrue; |
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295 |
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296 } |
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297 |
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298 |
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299 |
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300 CProcWAVFrameHandler::~CProcWAVFrameHandler() |
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301 { |
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302 |
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303 } |
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304 |
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305 CProcWAVFrameHandler* CProcWAVFrameHandler::NewL(TInt aBitsPerSample) |
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306 { |
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307 |
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308 |
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309 CProcWAVFrameHandler* self = NewLC(aBitsPerSample); |
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310 CleanupStack::Pop(self); |
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311 return self; |
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312 |
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313 } |
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314 CProcWAVFrameHandler* CProcWAVFrameHandler::NewLC(TInt aBitsPerSample) |
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315 { |
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316 |
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317 CProcWAVFrameHandler* self = new (ELeave) CProcWAVFrameHandler(aBitsPerSample); |
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318 CleanupStack::PushL(self); |
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319 self->ConstructL(); |
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320 return self; |
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321 |
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322 } |
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323 |
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324 void CProcWAVFrameHandler::ConstructL() |
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325 { |
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326 |
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327 } |
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328 |
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329 CProcWAVFrameHandler::CProcWAVFrameHandler(TInt aBitsPerSample) : iBitsPerSample(aBitsPerSample) |
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330 { |
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331 |
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332 } |
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333 |
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334 TInt CProcWAVFrameHandler::GetHighestGain(const HBufC8* aFrame, TInt& aMaxGain) const |
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335 { |
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336 |
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337 TInt maxGain = 0; |
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338 TInt a = 0; |
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339 |
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340 if (iBitsPerSample == 8) |
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341 { |
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342 aMaxGain = 210; |
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343 |
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344 for (a = 0 ; a < aFrame->Length() ; a++) |
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345 { |
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346 |
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347 TInt gain = Abs((*aFrame)[a]-128); |
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348 if (gain > maxGain) maxGain = gain; |
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349 |
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350 } |
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351 } |
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352 else if (iBitsPerSample == 16) |
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353 { |
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354 |
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355 aMaxGain = 452; |
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356 for (a = 0 ; a < aFrame->Length()-1 ; a += 2) |
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357 { |
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358 TInt ga = ((*aFrame)[a+1]*256 + (*aFrame)[a]); |
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359 |
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360 if (ga > 32767) ga-= 65792; |
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361 |
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362 ga = Abs(ga); |
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363 |
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364 if (ga > maxGain) maxGain = ga; |
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365 |
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366 } |
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367 |
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368 } |
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369 |
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370 TReal result = 0; |
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371 TReal gai(maxGain); |
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372 |
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373 if (gai!= 0) Math::Log(result, gai); |
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374 result *= 100; |
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375 |
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376 return (TInt) result; |
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377 |
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378 |
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379 |
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380 |
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381 |
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382 } |
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383 |
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384 |
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