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 #include <e32base.h> |
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22 #include <f32file.h> |
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23 #include "AudCommon.h" |
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24 #include "ProcConstants.h" |
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25 #include "ProcADTSInFileHandler.h" |
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26 //#include "mp4aud.h" |
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27 #include "mp4config.h" |
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28 #include "audconstants.h" |
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29 |
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30 #include "ProcTools.h" |
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31 #include "ProcAACFrameHandler.h" |
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32 |
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33 |
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34 |
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35 CProcADTSInFileHandler* CProcADTSInFileHandler::NewL(const TDesC& aFileName, RFile* aFileHandle, |
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36 CAudClip* aClip, TInt aReadBufferSize, |
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37 TInt aTargetSampleRate, TChannelMode aChannelMode) |
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38 { |
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39 |
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40 CProcADTSInFileHandler* self = NewLC(aFileName, aFileHandle, aClip, aReadBufferSize, aTargetSampleRate, aChannelMode); |
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41 CleanupStack::Pop(self); |
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42 return self; |
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43 |
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44 } |
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45 |
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46 CProcADTSInFileHandler* CProcADTSInFileHandler::NewLC(const TDesC& aFileName, RFile* aFileHandle, |
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47 CAudClip* aClip, TInt aReadBufferSize, TInt aTargetSampleRate, |
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48 TChannelMode aChannelMode) |
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49 |
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50 { |
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51 |
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52 CProcADTSInFileHandler* self = new (ELeave) CProcADTSInFileHandler(); |
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53 CleanupStack::PushL(self); |
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54 self->ConstructL(aFileName, aFileHandle, aClip, aReadBufferSize, aTargetSampleRate, aChannelMode); |
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55 return self; |
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56 |
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57 } |
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58 |
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59 void CProcADTSInFileHandler::GetPropertiesL(TAudFileProperties* aProperties) |
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60 { |
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61 |
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62 if (iProperties != 0) |
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63 { |
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64 *aProperties = *iProperties; |
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65 return; |
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66 } |
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67 |
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68 aProperties->iDuration = 0; |
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69 aProperties->iSamplingRate = 0; |
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70 aProperties->iBitrate = 0; |
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71 aProperties->iChannelMode = EAudChannelModeNotRecognized; |
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72 aProperties->iFrameLen = 0; |
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73 aProperties->iFrameCount = 0; |
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74 |
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75 aProperties->iAudioType = EAudTypeUnrecognized; |
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76 aProperties->iAudioTypeExtension = EAudExtensionTypeNoExtension; |
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77 aProperties->iFileFormat = EAudFormatUnrecognized; |
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78 aProperties->iBitrateMode = EAudBitrateModeNotRecognized; |
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79 aProperties->iFrameDuration = 0; |
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80 aProperties->iNumFramesPerSample = 1; |
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81 aProperties->iChannelModeExtension = EAudChannelModeNotRecognized; |
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82 aProperties->iAACObjectType = EAudAACObjectTypeNone; |
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83 |
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84 if (!iSupportedFile) |
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85 { |
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86 User::Leave(KErrNotSupported); |
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87 return; |
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88 } |
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89 |
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90 ReadHeaderInformation(aProperties); |
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91 ReadOtherInformationL(aProperties); |
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92 |
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93 aProperties->iBitrateMode = EAudConstant; |
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94 |
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95 if (iProperties == 0) |
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96 { |
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97 iProperties = new (ELeave) TAudFileProperties; |
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98 *iProperties = *aProperties; |
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99 } |
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100 |
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101 } |
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102 |
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103 |
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104 TBool CProcADTSInFileHandler::SeekAudioFrame(TInt32 aTime) |
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105 { |
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106 |
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107 if (!iSupportedFile) |
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108 { |
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109 return EFalse; |
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110 } |
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111 |
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112 if (aTime == 0) |
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113 { |
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114 FindFirstAACFrame(); |
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115 iCurrentTimeMilliseconds = aTime; |
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116 return ETrue; |
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117 } |
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118 |
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119 else FindFirstAACFrame(); |
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120 |
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121 TBuf8<6> header; |
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122 |
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123 if(BufferedFileRead(header, 6) != 6) |
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124 { |
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125 return EFalse; |
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126 } |
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127 |
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128 if (header.Length() != 6) |
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129 { |
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130 return EFalse; |
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131 } |
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132 |
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133 TUint8 byte2 = header[1]; |
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134 TBuf8<8> byte2b; |
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135 ProcTools::Dec2Bin(byte2, byte2b); |
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136 // lets confirm that we have found a legal AAC header |
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137 if (header[0] == 0xFF && |
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138 byte2b[0] == '1' && |
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139 byte2b[1] == '1' && |
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140 byte2b[2] == '1' && |
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141 byte2b[3] == '1' && |
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142 //byte2b[4] == '1' && |
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143 byte2b[5] == '0' && |
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144 byte2b[6] == '0') |
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145 { |
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146 } |
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147 else |
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148 { |
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149 return EFalse; |
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150 } |
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151 |
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152 TUint8 byte4 = header[3]; |
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153 TUint8 byte5 = header[4]; |
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154 TUint8 byte6 = header[5]; |
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155 |
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156 TUint frameLen = CalculateAACFrameLength(byte4, byte5, byte6); |
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157 //aFrame = HBufC8::NewL(frameLen); |
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158 |
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159 TInt dur = 0; |
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160 |
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161 while (BufferedFileSetFilePos(iFilePos-6+frameLen)) |
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162 { |
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163 |
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164 dur = dur + ProcTools::MilliSeconds(iProperties->iFrameDuration); |
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165 if (dur > aTime) |
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166 { |
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167 break; |
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168 } |
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169 |
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170 if(BufferedFileRead(header, 6) != 6) |
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171 { |
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172 break; |
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173 } |
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174 |
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175 if (header.Length() != 6) |
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176 { |
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177 break; |
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178 } |
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179 |
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180 if (header[0] != 0xFF) break; |
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181 byte4 = header[3]; |
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182 byte5 = header[4]; |
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183 byte6 = header[5]; |
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184 |
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185 frameLen = CalculateAACFrameLength(byte4, byte5, byte6); |
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186 |
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187 } |
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188 |
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189 |
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190 aTime = dur; |
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191 iCurrentTimeMilliseconds = aTime; |
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192 return ETrue; |
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193 } |
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194 |
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195 TBool CProcADTSInFileHandler::SeekCutInFrame() |
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196 { |
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197 iCurrentTimeMilliseconds = iCutInTime; |
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198 return SeekAudioFrame(iCutInTime); |
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199 } |
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200 |
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201 |
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202 |
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203 |
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204 TBool CProcADTSInFileHandler::SetNormalizingGainL(const CProcFrameHandler* aFrameHandler) |
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205 { |
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206 |
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207 |
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208 HBufC8* point = 0; |
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209 TInt siz; |
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210 TInt32 tim = 0; |
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211 TInt maxGain = 0; |
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212 RArray<TInt> gains; |
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213 TInt maxAverage = 0; |
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214 TInt tmpGain = 0; |
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215 TInt gainCounter = 0; |
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216 TInt timeNow = 0; |
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217 while(GetEncAudioFrameL(point, siz, tim)) |
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218 { |
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219 CleanupStack::PushL(point); |
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220 |
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221 aFrameHandler->GetGainL(point, gains, maxGain); |
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222 timeNow += tim; |
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223 |
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224 for (TInt a = 0 ; a < gains.Count() ; a++) |
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225 { |
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226 tmpGain += gains[a]; |
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227 gainCounter++; |
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228 } |
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229 gains.Reset(); |
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230 |
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231 if (timeNow > 1000) |
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232 { |
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233 if (tmpGain/gainCounter > maxAverage) |
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234 { |
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235 maxAverage = tmpGain/gainCounter; |
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236 } |
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237 |
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238 timeNow = 0; |
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239 tmpGain = 0; |
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240 gainCounter = 0; |
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241 } |
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242 |
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243 CleanupStack::PopAndDestroy(point); |
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244 |
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245 } |
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246 |
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247 // bigger value makes normalizing more efficient, but makes |
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248 // dynamic compression more likely to occur |
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249 TInt NormalizingFactor = 175; |
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250 if (iProperties->iBitrate > 20000 && iProperties->iBitrate < 40000) |
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251 { |
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252 |
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253 // 32 kBit/s |
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254 NormalizingFactor = 170; |
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255 |
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256 } |
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257 else if (iProperties->iBitrate > 80000 && iProperties->iBitrate < 110000) |
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258 { |
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259 // 96 kBit/s |
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260 NormalizingFactor = 170; |
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261 |
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262 } |
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263 |
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264 |
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265 else if (iProperties->iBitrate > 110000 && iProperties->iBitrate < 140000) |
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266 { |
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267 // 128 kBit/s |
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268 if (iProperties->iChannelMode == EAudSingleChannel) |
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269 NormalizingFactor = 160; |
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270 else |
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271 NormalizingFactor = 170; |
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272 |
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273 } |
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274 else if (iProperties->iBitrate > 150000) |
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275 { |
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276 // 256 kBit/s |
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277 if (iProperties->iChannelMode == EAudSingleChannel) |
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278 NormalizingFactor = 150; |
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279 else |
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280 NormalizingFactor = 165; |
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281 |
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282 } |
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283 else |
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284 { |
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285 |
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286 if (iProperties->iChannelMode == EAudSingleChannel) |
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287 NormalizingFactor = 170; |
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288 |
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289 } |
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290 |
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291 |
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292 TInt gainBoost = (NormalizingFactor-maxAverage)*3; |
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293 |
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294 if (gainBoost < 0) gainBoost = 0; |
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295 |
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296 iNormalizingMargin = static_cast<TInt8>(gainBoost); |
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297 |
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298 return ETrue; |
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299 |
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300 } |
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301 |
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302 |
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303 TBool CProcADTSInFileHandler::ReadAudioDecoderSpecificInfoL(HBufC8*& aBytes, TInt aBufferSize) |
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304 { |
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305 |
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306 if (aBufferSize < iMP4DecSpecInfo->Size()) return EFalse; |
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307 |
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308 if (iMP4DecSpecInfo != 0) |
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309 { |
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310 aBytes = HBufC8::NewL(iMP4DecSpecInfo->Size()); |
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311 aBytes->Des().Append(iMP4DecSpecInfo->Des()); |
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312 return ETrue; |
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313 } |
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314 else |
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315 { |
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316 aBytes = 0; |
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317 return EFalse; |
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318 } |
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319 |
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320 } |
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321 |
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322 |
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323 CProcADTSInFileHandler::~CProcADTSInFileHandler() |
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324 { |
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325 ResetAndCloseFile(); |
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326 |
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327 if (iSilentFrame != 0) |
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328 { |
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329 delete iSilentFrame; |
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330 } |
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331 |
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332 if (iMP4DecSpecInfo != 0) |
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333 { |
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334 delete iMP4DecSpecInfo; |
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335 |
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336 } |
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337 |
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338 |
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339 if (iFrameInfo != 0) |
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340 { |
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341 delete iFrameInfo; |
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342 |
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343 } |
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344 |
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345 delete iFrameHandler; |
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346 |
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347 delete iDecoder; |
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348 |
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349 } |
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350 |
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351 |
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352 void CProcADTSInFileHandler::ConstructL(const TDesC& aFileName, |
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353 RFile* aFileHandle, |
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354 CAudClip* aClip, |
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355 TInt aReadBufferSize, |
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356 TInt aTargetSampleRate, |
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357 TChannelMode aChannelMode) |
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358 { |
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359 |
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360 |
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361 |
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362 iTargetSampleRate = aTargetSampleRate; |
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363 iChannelMode = aChannelMode; |
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364 |
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365 InitAndOpenFileL(aFileName, aFileHandle, aReadBufferSize); |
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366 |
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367 if (aClip != 0) |
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368 { |
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369 iCutInTime = ProcTools::MilliSeconds(aClip->CutInTime()); |
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370 |
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371 } |
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372 |
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373 TBool frameFound = FindFirstAACFrame(); |
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374 |
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375 if (!frameFound) |
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376 { |
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377 iSupportedFile = EFalse; |
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378 return; |
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379 } |
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380 |
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381 iClip = aClip; |
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382 |
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383 TAudFileProperties prop; |
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384 iFrameInfo = new (ELeave) TAACFrameHandlerInfo; |
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385 GetPropertiesL(&prop); |
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386 |
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387 if (prop.iAudioTypeExtension != EAudExtensionTypeNoExtension) |
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388 { |
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389 // AACPlus frame duration is calculated from sampling rate |
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390 // the actual sampling rate of AAC plus is twice as high as |
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391 // the AAC part |
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392 iProperties->iFrameDuration = iProperties->iFrameDuration.Int64()/2; |
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393 |
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394 } |
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395 |
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396 // fill in aacInfo for retrieving decoder specific information |
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397 //AACStreamInfo aacInfo; |
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398 int16 frameLen = 0; |
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399 int32 sampleRate = 0; |
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400 uint8 profile = 0; |
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401 uint8 nChannels = 0; |
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402 |
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403 // generate a silent frame ------------------> |
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404 |
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405 if (iProperties->iChannelMode == EAudSingleChannel) |
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406 { |
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407 |
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408 iSilentFrame = HBufC8::NewL(KSilentMonoAACFrameLenght); |
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409 |
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410 iSilentFrame->Des().Append(KSilentMonoAACFrame, KSilentMonoAACFrameLenght); |
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411 |
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412 nChannels = 1; |
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413 } |
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414 else if (iProperties->iChannelMode == EAudStereo) |
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415 { |
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416 |
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417 iSilentFrame = HBufC8::NewL(KSilentStereoAACFrameLenght); |
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418 iSilentFrame->Des().Append(KSilentStereoAACFrame, KSilentStereoAACFrameLenght); |
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419 |
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420 nChannels = 2; |
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421 } |
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422 else |
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423 { |
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424 User::Leave(KErrNotSupported); |
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425 } |
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426 |
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427 // Check that the sample rate is supported |
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428 if( (iProperties->iSamplingRate != KAedSampleRate8kHz) && |
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429 (iProperties->iSamplingRate != KAedSampleRate11kHz) && |
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430 (iProperties->iSamplingRate != KAedSampleRate16kHz) && |
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431 (iProperties->iSamplingRate != KAedSampleRate22kHz) && |
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432 (iProperties->iSamplingRate != KAedSampleRate24kHz) && |
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433 (iProperties->iSamplingRate != KAedSampleRate32kHz) && |
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434 (iProperties->iSamplingRate != KAedSampleRate44kHz) && |
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435 (iProperties->iSamplingRate != KAedSampleRate48kHz) ) |
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436 { |
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437 User::Leave(KErrNotSupported); |
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438 } |
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439 |
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440 |
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441 |
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442 uint8 decSpecInfo[16]; |
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443 int16 nConfigBytes; |
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444 |
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445 |
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446 frameLen = 1024; |
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447 sampleRate = iProperties->iSamplingRate; |
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448 if (iFrameInfo->iProfileID == 3) |
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449 { |
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450 profile = LTP_OBJECT; |
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451 } |
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452 else if (iFrameInfo->iProfileID == 1) |
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453 { |
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454 profile = LC_OBJECT; |
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455 } |
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456 else |
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457 { |
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458 User::Leave(KErrNotSupported); |
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459 } |
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460 |
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461 //nConfigBytes = AACGetMP4ConfigInfo(&aacInfo, decSpecInfo, 16); |
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462 nConfigBytes = AACGetMP4ConfigInfo(sampleRate, profile, |
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463 nChannels, frameLen, decSpecInfo, 16); |
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464 |
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465 |
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466 if (nConfigBytes > 0) |
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467 { |
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468 |
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469 iMP4DecSpecInfo = HBufC8::NewL(nConfigBytes); |
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470 iMP4DecSpecInfo->Des().Append(decSpecInfo, nConfigBytes); |
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471 |
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472 } |
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473 |
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474 |
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475 mp4_u32 frameDurationMilli = ProcTools::MilliSeconds(iProperties->iFrameDuration); |
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476 |
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477 iSilentFrameDuration = frameDurationMilli; |
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478 |
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479 |
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480 // <------------------generate a silent frame |
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481 |
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482 // Generate a decoder -----------------------> |
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483 |
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484 iDecoder = CProcDecoder::NewL(); |
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485 |
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486 iDecodingPossible = iDecoder->InitL(*iProperties, aTargetSampleRate, aChannelMode); |
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487 |
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488 // <----------------------- Generate a decoder |
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489 |
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490 // Create a frame handler ---------------------> |
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491 |
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492 iFrameHandler = CProcAACFrameHandler::NewL(*iFrameInfo); |
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493 |
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494 if (iClip != 0 && iClip->Normalizing()) |
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495 { |
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496 SetNormalizingGainL(iFrameHandler); |
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497 } |
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498 |
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499 |
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500 } |
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501 |
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502 |
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503 |
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504 |
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505 TBool CProcADTSInFileHandler::GetEncAudioFrameL(HBufC8*& aFrame, TInt& aSize, TInt32& aTime) |
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506 { |
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507 |
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508 if (!iSupportedFile) |
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509 { |
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510 return EFalse; |
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511 } |
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512 |
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513 |
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514 TBuf8<7> header; |
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515 |
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516 if(BufferedFileRead(header, 7) != 7) |
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517 { |
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518 return EFalse; |
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519 } |
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520 |
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521 if (header.Length() != 7) |
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522 { |
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523 return EFalse; |
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524 } |
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525 |
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526 if (header[0] != 0xFF) return EFalse; |
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527 TUint8 byte4 = header[3]; |
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528 TUint8 byte5 = header[4]; |
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529 TUint8 byte6 = header[5]; |
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530 // TUint8 byte7 = header[6]; |
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531 |
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532 |
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533 TInt frameLen = CalculateAACFrameLength(byte4, byte5, byte6); |
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534 aFrame = HBufC8::NewL(frameLen); |
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535 |
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536 BufferedFileSetFilePos(iFilePos-7); |
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537 TPtr8 tmpDes((TPtr8)aFrame->Des()); |
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538 |
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539 if (BufferedFileRead((TPtr8&)tmpDes, frameLen) != frameLen) |
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540 { |
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541 delete aFrame; |
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542 aFrame = 0; |
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543 return EFalse; |
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544 } |
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545 |
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546 aSize = frameLen; |
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547 aTime = ProcTools::MilliSeconds(iProperties->iFrameDuration); |
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548 |
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549 // remove ADTS header --------------------------------------------> |
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550 |
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551 TInt headerLength = 0; // because we need to remove header in case of AAC frame from .aac files |
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552 //check Header length to be removed from the frame before writting to 3gp file |
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553 TUint8* dtPtr = (TUint8*)(aFrame->Ptr()); |
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554 if((dtPtr[1]&& 0x01) == 0x00) //based on bytes decide header length to remove |
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555 { |
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556 headerLength =9; |
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557 } |
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558 else if((dtPtr[1]&& 0x01)== 0x01) |
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559 { |
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560 headerLength =7; |
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561 } |
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562 else |
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563 { |
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564 headerLength =0; |
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565 } |
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566 |
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567 aFrame->Des().Delete(0,headerLength); |
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568 aSize -= headerLength; |
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569 |
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570 // <--------------------------------------------- remove ADTS header |
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571 |
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572 iCurrentTimeMilliseconds += ProcTools::MilliSeconds(iProperties->iFrameDuration); |
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573 |
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574 |
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575 // Fix for synchronizing problem ----------------------------------> |
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576 // If the accurate frame length cannot be represented in milliseconds |
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577 // store the remainder and increase the output frame lenght by one ms |
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578 // when needed. Accuracy depends on sampling rate |
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579 |
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580 TReal accurateFrameLen = TReal(1024000)/iProperties->iSamplingRate; |
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581 |
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582 iAACFrameLenRemainderMilli += accurateFrameLen - aTime; |
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583 |
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584 if (iAACFrameLenRemainderMilli > 1) |
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585 { |
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586 aTime += 1; |
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587 iCurrentTimeMilliseconds += 1; |
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588 iAACFrameLenRemainderMilli -= 1; |
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589 } |
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590 |
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591 |
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592 // <---------------------------------- Fix for synchronizing problem |
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593 |
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594 |
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595 if (iProperties->iAudioTypeExtension == EAudExtensionTypeNoExtension) |
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596 { |
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597 |
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598 |
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599 // AACPlus is handled after decoding |
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600 |
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601 TRAPD(err, ManipulateGainL(aFrame)); |
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602 |
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603 if (err != KErrNone) |
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604 { |
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605 // something went wrong with the gain manipulation |
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606 // continue by returning the original frame |
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607 } |
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608 } |
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609 |
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610 |
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611 aSize = aFrame->Size(); |
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612 |
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613 return ETrue; |
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614 |
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615 |
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616 } |
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617 |
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618 CProcADTSInFileHandler::CProcADTSInFileHandler() : CProcInFileHandler(), iFrameInfo(0), |
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619 iSupportedFile(ETrue) |
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620 { |
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621 |
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622 |
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623 } |
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624 |
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625 |
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626 TBool CProcADTSInFileHandler::FindFirstAACFrame() |
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627 { |
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628 |
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629 TBuf8<8> byte2b; |
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630 TUint8 byte2; |
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631 TUint8 byte1; |
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632 |
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633 TBool fileEnded = EFalse; |
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634 TUint ind = 0; |
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635 TBool frameFound = EFalse; |
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636 |
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637 BufferedFileSetFilePos(0); |
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638 |
|
639 while (!fileEnded) |
|
640 { |
|
641 if (BufferedFileReadChar(ind, byte1) == 0) |
|
642 { |
|
643 fileEnded = ETrue; |
|
644 } |
|
645 ind++; |
|
646 |
|
647 if (byte1 != 0xFF) continue; |
|
648 |
|
649 |
|
650 if (BufferedFileReadChar(ind, byte2) == 0) |
|
651 { |
|
652 fileEnded = ETrue; |
|
653 } |
|
654 ind++; |
|
655 ProcTools::Dec2Bin(byte2, byte2b); |
|
656 |
|
657 |
|
658 if (byte1 == 0xFF && |
|
659 byte2b[0] == '1' && |
|
660 byte2b[1] == '1' && |
|
661 byte2b[2] == '1' && |
|
662 byte2b[3] == '1' && |
|
663 //byte2b[4] == '1' && |
|
664 byte2b[5] == '0' && |
|
665 byte2b[6] == '0') |
|
666 { |
|
667 |
|
668 // this looks like AAC frame header, let's confirm... |
|
669 TUint8 byte3, byte4, byte5, byte6; |
|
670 BufferedFileReadChar(ind, byte3); |
|
671 BufferedFileReadChar(ind+1, byte4); |
|
672 BufferedFileReadChar(ind+2, byte5); |
|
673 BufferedFileReadChar(ind+3, byte6); |
|
674 |
|
675 ind++; |
|
676 |
|
677 TUint frameLength = CalculateAACFrameLength(byte4, byte5, byte6); |
|
678 |
|
679 TUint8 testByte1, testByte2, testByte3; |
|
680 BufferedFileReadChar(ind+frameLength-3, testByte1); |
|
681 BufferedFileReadChar(ind+frameLength-2, testByte2); |
|
682 BufferedFileReadChar(ind+frameLength-1, testByte3); |
|
683 |
|
684 if (byte1 == testByte1 && byte2 == testByte2 |
|
685 && byte3 == testByte3) |
|
686 { |
|
687 // this must be the header... |
|
688 iFirstFrame = ind-3; |
|
689 //FillInHeaderValues(byte2, byte3, byte4); |
|
690 frameFound = ETrue; |
|
691 break; |
|
692 } |
|
693 |
|
694 } |
|
695 |
|
696 } |
|
697 if (frameFound) |
|
698 { |
|
699 BufferedFileSetFilePos(iFirstFrame); |
|
700 } |
|
701 |
|
702 return frameFound; |
|
703 } |
|
704 |
|
705 |
|
706 TUint CProcADTSInFileHandler::CalculateAACFrameLength(TUint8 byte4, TUint8 byte5, TUint8 byte6) |
|
707 { |
|
708 |
|
709 TBuf8<13> headerLengthB; |
|
710 TBuf8<8> byte4b, byte5b, byte6b; |
|
711 ProcTools::Dec2Bin(byte4, byte4b); |
|
712 ProcTools::Dec2Bin(byte5, byte5b); |
|
713 ProcTools::Dec2Bin(byte6, byte6b); |
|
714 |
|
715 headerLengthB.Append(byte4b[6]); |
|
716 headerLengthB.Append(byte4b[7]); |
|
717 headerLengthB.Append(byte5b); |
|
718 headerLengthB.Append(byte6b[0]); |
|
719 headerLengthB.Append(byte6b[1]); |
|
720 headerLengthB.Append(byte6b[2]); |
|
721 |
|
722 |
|
723 TUint headerLength = 0; |
|
724 TLex8 leks(headerLengthB); |
|
725 |
|
726 if (leks.Val(headerLength, EBinary) != KErrNone) |
|
727 { |
|
728 return 0; |
|
729 } |
|
730 |
|
731 return headerLength; |
|
732 |
|
733 } |
|
734 |
|
735 |
|
736 TBool CProcADTSInFileHandler::ReadHeaderInformation(TAudFileProperties* aProperties) |
|
737 { |
|
738 |
|
739 TInt origFilePos = iFilePos; |
|
740 |
|
741 if (aProperties == 0) |
|
742 return EFalse; |
|
743 |
|
744 TBuf8<4> header; |
|
745 |
|
746 if(BufferedFileRead(header, 4) != 4) |
|
747 { |
|
748 BufferedFileSetFilePos(origFilePos); |
|
749 return EFalse; |
|
750 } |
|
751 |
|
752 if (header.Length() != 4) |
|
753 { |
|
754 BufferedFileSetFilePos(origFilePos); |
|
755 return EFalse; |
|
756 } |
|
757 |
|
758 TUint8 byte2 = header[1]; |
|
759 TBuf8<8> byte2b; |
|
760 ProcTools::Dec2Bin(byte2, byte2b); |
|
761 // lets confirm that we have found a legal AAC header |
|
762 if (header[0] == 0xFF && |
|
763 byte2b[0] == '1' && |
|
764 byte2b[1] == '1' && |
|
765 byte2b[2] == '1' && |
|
766 byte2b[3] == '1' && |
|
767 //byte2b[4] == '1' && |
|
768 byte2b[5] == '0' && |
|
769 byte2b[6] == '0') |
|
770 { |
|
771 // OK |
|
772 aProperties->iFileFormat = EAudFormatAAC_ADTS; |
|
773 // aProperties->iFrameDuration = 23000; |
|
774 } |
|
775 else |
|
776 { |
|
777 return EFalse; |
|
778 } |
|
779 /* |
|
780 if (byte2b[4] == '1') |
|
781 { |
|
782 aProperties->iAudioType = EAudAAC_MPEG2; |
|
783 } |
|
784 else |
|
785 { |
|
786 aProperties->iAudioType = EAudAAC_MPEG4; |
|
787 } |
|
788 */ |
|
789 |
|
790 // NOTE: call all MPeg audio EAudAAC_MPEG4 |
|
791 aProperties->iAudioType = EAudAAC_MPEG4; |
|
792 |
|
793 |
|
794 TUint8 byte3 = header[2]; |
|
795 TUint8 byte4 = header[3]; |
|
796 |
|
797 TBuf8<8> byte3b; |
|
798 TBuf8<8> byte4b; |
|
799 |
|
800 ProcTools::Dec2Bin(byte2, byte2b); |
|
801 ProcTools::Dec2Bin(byte3, byte3b); |
|
802 ProcTools::Dec2Bin(byte4, byte4b); |
|
803 |
|
804 TBuf8<2> profileId(byte3b.Left(2)); |
|
805 TUint proID = 0; |
|
806 ProcTools::Bin2Dec(profileId, proID); |
|
807 |
|
808 iFrameInfo->iProfileID = static_cast<TUint8>(proID); |
|
809 aProperties->iAACObjectType = TAudAACObjectType(iFrameInfo->iProfileID); |
|
810 |
|
811 |
|
812 TBuf8<4> samplingRateIndexB; |
|
813 samplingRateIndexB.Append(byte3b[2]); |
|
814 samplingRateIndexB.Append(byte3b[3]); |
|
815 samplingRateIndexB.Append(byte3b[4]); |
|
816 samplingRateIndexB.Append(byte3b[5]); |
|
817 |
|
818 TUint srIndex = 0; |
|
819 TLex8 lek(samplingRateIndexB); |
|
820 |
|
821 if (lek.Val(srIndex, EBinary) != KErrNone) |
|
822 { |
|
823 BufferedFileSetFilePos(origFilePos); |
|
824 return EFalse; |
|
825 } |
|
826 // aac sampling rates |
|
827 |
|
828 const TInt KAAC_SAMPLING_RATES[16] = {96000,88200,64000,48000,44100,32000,24000 |
|
829 ,22050,16000,12000,11025,8000,0,0,0,0}; |
|
830 |
|
831 iFrameInfo->iSampleRateID = static_cast<TUint8>(srIndex); |
|
832 aProperties->iSamplingRate = KAAC_SAMPLING_RATES[srIndex]; |
|
833 samplingRateIndexB.Delete(0, samplingRateIndexB.Length()); |
|
834 |
|
835 // channel configuration |
|
836 |
|
837 |
|
838 TUint aacChannels = 0; |
|
839 TBuf8<3> channelB; |
|
840 channelB.Append(byte3b[7]); |
|
841 channelB.Append(byte4b[0]); |
|
842 channelB.Append(byte4b[1]); |
|
843 |
|
844 TLex8 leks2(channelB); |
|
845 if (leks2.Val(aacChannels, EBinary) != KErrNone) |
|
846 { |
|
847 BufferedFileSetFilePos(origFilePos); |
|
848 return EFalse; |
|
849 } |
|
850 |
|
851 if (aacChannels == 1) |
|
852 { |
|
853 aProperties->iChannelMode = EAudSingleChannel; |
|
854 } |
|
855 else if (aacChannels == 2) |
|
856 { |
|
857 aProperties->iChannelMode = EAudStereo; |
|
858 } |
|
859 |
|
860 iFrameInfo->iNumChannels = static_cast<TUint8>(aacChannels); |
|
861 iFrameInfo->iNumCouplingChannels = 0; |
|
862 iFrameInfo->iIs960 = 0; |
|
863 |
|
864 |
|
865 BufferedFileSetFilePos(origFilePos); |
|
866 return ETrue; |
|
867 |
|
868 } |
|
869 |
|
870 |
|
871 TBool CProcADTSInFileHandler::ReadOtherInformationL(TAudFileProperties* aProperties) |
|
872 { |
|
873 |
|
874 TInt origFilePos = iFilePos; |
|
875 |
|
876 FindFirstAACFrame(); |
|
877 |
|
878 TBuf8<7> header; |
|
879 |
|
880 if(BufferedFileRead(header, 7) != 7) |
|
881 { |
|
882 return EFalse; |
|
883 } |
|
884 |
|
885 if (header.Length() != 7) |
|
886 { |
|
887 return EFalse; |
|
888 } |
|
889 |
|
890 TUint8 byte2 = header[1]; |
|
891 TBuf8<8> byte2b; |
|
892 ProcTools::Dec2Bin(byte2, byte2b); |
|
893 // lets confirm that we have found a legal AAC header |
|
894 if (header[0] == 0xFF && |
|
895 byte2b[0] == '1' && |
|
896 byte2b[1] == '1' && |
|
897 byte2b[2] == '1' && |
|
898 byte2b[3] == '1' && |
|
899 // byte2b[4] == '1' && |
|
900 byte2b[5] == '0' && |
|
901 byte2b[6] == '0') |
|
902 { |
|
903 // OK |
|
904 //aProperties->iAudioType = EAudAAC; |
|
905 //aProperties->iFileFormat = EAudFormatAAC_ADTS; |
|
906 } |
|
907 else |
|
908 { |
|
909 return EFalse; |
|
910 } |
|
911 |
|
912 TUint8 byte4 = header[3]; |
|
913 TUint8 byte5 = header[4]; |
|
914 TUint8 byte6 = header[5]; |
|
915 |
|
916 aProperties->iFrameDuration = ((1024*1000)/(aProperties->iSamplingRate))*1000; |
|
917 |
|
918 TInt frameLen = CalculateAACFrameLength(byte4, byte5, byte6); |
|
919 |
|
920 |
|
921 |
|
922 |
|
923 /*-- Allocate resources and read 1st frame. --*/ |
|
924 HBufC8 *aFrame = HBufC8::NewL(frameLen); |
|
925 CleanupStack::PushL(aFrame); |
|
926 |
|
927 TPtr8 tmpDes((TPtr8)aFrame->Des()); |
|
928 |
|
929 BufferedFileRead((TPtr8&)tmpDes, frameLen - 7); |
|
930 |
|
931 |
|
932 const TInt KShortestAACFrame = 20; |
|
933 |
|
934 if (frameLen > KShortestAACFrame) // a silent frame? |
|
935 { |
|
936 |
|
937 |
|
938 |
|
939 /* |
|
940 * Get frame parameters for eAAC+ codec. It is possible that the bitstream |
|
941 * is plain AAC but we don't know it before the 1st frame is parsed! |
|
942 */ |
|
943 |
|
944 TUint8* buf = const_cast<TUint8*>(aFrame->Right(aFrame->Size()).Ptr()); |
|
945 CProcAACFrameHandler::GetEnhancedAACPlusParametersL(buf, frameLen - 7, aProperties, iFrameInfo); |
|
946 |
|
947 } |
|
948 else |
|
949 { |
|
950 iFrameInfo->iIsParametricStereo = EFalse; |
|
951 iFrameInfo->isSBR = EFalse; |
|
952 |
|
953 } |
|
954 |
|
955 CleanupStack::Pop(aFrame); |
|
956 delete aFrame; |
|
957 aFrame = 0; |
|
958 |
|
959 |
|
960 |
|
961 |
|
962 |
|
963 if(BufferedFileRead(header, 7) != 7) |
|
964 { |
|
965 return EFalse; |
|
966 } |
|
967 |
|
968 if (header.Length() != 7) |
|
969 { |
|
970 return EFalse; |
|
971 } |
|
972 |
|
973 byte4 = header[3]; |
|
974 byte5 = header[4]; |
|
975 byte6 = header[5]; |
|
976 |
|
977 TInt dur = ProcTools::MilliSeconds(aProperties->iFrameDuration); |
|
978 TInt bytes = frameLen; |
|
979 TInt frames = 1; |
|
980 |
|
981 frameLen = CalculateAACFrameLength(byte4, byte5, byte6); |
|
982 |
|
983 while (BufferedFileSetFilePos(iFilePos-7+frameLen)) |
|
984 { |
|
985 |
|
986 dur += ProcTools::MilliSeconds(aProperties->iFrameDuration); |
|
987 bytes += frameLen; |
|
988 frames++; |
|
989 |
|
990 if(BufferedFileRead(header, 7) != 7) |
|
991 { |
|
992 break; |
|
993 } |
|
994 |
|
995 if (header.Length() != 7) |
|
996 { |
|
997 break; |
|
998 } |
|
999 |
|
1000 if (header[0] != 0xFF) break; |
|
1001 byte4 = header[3]; |
|
1002 byte5 = header[4]; |
|
1003 byte6 = header[5]; |
|
1004 |
|
1005 frameLen = CalculateAACFrameLength(byte4, byte5, byte6); |
|
1006 |
|
1007 } |
|
1008 |
|
1009 TTimeIntervalMicroSeconds tmp((TInt64)(TInt)dur*1000); |
|
1010 aProperties->iDuration = tmp; |
|
1011 |
|
1012 aProperties->iFrameCount = frames; |
|
1013 aProperties->iFrameLen = bytes/frames; |
|
1014 aProperties->iBitrate = (iFilePos*1000/(dur))*8; |
|
1015 |
|
1016 |
|
1017 BufferedFileSetFilePos(origFilePos); |
|
1018 |
|
1019 return ETrue; |
|
1020 } |
|
1021 |
|
1022 TBool CProcADTSInFileHandler::GetInfoForFrameHandler(TAACFrameHandlerInfo& aAACInfo) |
|
1023 { |
|
1024 |
|
1025 aAACInfo = *iFrameInfo; |
|
1026 return ETrue; |
|
1027 } |
|
1028 |
|