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1 /* |
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2 * Copyright (c) 2009 Aricent and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of the License "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 * Aricent - 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 * Plugin class for AacLC encoder. This class inherits CMMFCodec |
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16 * class and implements the pure virtual functions of CMMFCodec. |
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17 * The class also has a few private funtions. |
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18 * |
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19 */ |
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20 |
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21 |
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22 #ifndef ARIAACLCENCMMFCODEC_H |
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23 #define ARIAACLCENCMMFCODEC_H |
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24 |
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25 #include <mmfcodec.h> |
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26 |
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27 //Enum representing the output file format |
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28 enum TOutputFormat |
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29 { |
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30 EFormatRaw = 0, |
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31 EFormatADIF = 1, |
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32 EFormatADTS = 2 |
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33 }; |
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34 |
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35 //Class to hold encoder parameters |
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36 class TAacEncParam |
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37 { |
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38 public: |
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39 TUint iNumberOfChannels; |
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40 TUint iSamplingFrequency; |
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41 TUint iTurnOnPns; |
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42 TUint iTurnOnTns; |
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43 TUint iVersionInfo; |
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44 TOutputFormat iOutputFormat; |
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45 TUint iOutputBitRate; |
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46 }; |
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47 |
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48 //Forward Declaration |
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49 class CAriAacLCEncWrapper; |
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50 |
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51 //Class Declaration |
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52 class CAriAacLCEncMmfCodec:public CMMFCodec |
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53 { |
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54 public: //constructors and destructors |
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55 /** |
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56 * Two-phased constructor. |
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57 * @return pointer to an instance of CMMFCodec |
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58 */ |
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59 static CMMFCodec* NewL(); |
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60 |
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61 /**> Destructor */ |
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62 ~CAriAacLCEncMmfCodec(); |
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63 |
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64 public: // From CMMFCodec |
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65 |
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66 /** |
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67 * From CMMFCodec |
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68 * Sets codec configuration. |
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69 * The configuration data is passed in as a descriptor of type TDesC8. |
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70 * @param aConfigType |
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71 * The UID of the configuration data. |
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72 * @param aParam |
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73 * Descriptor with frame info parameters in the form of RArray |
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74 */ |
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75 virtual void ConfigureL( TUid aConfigType, const TDesC8& aParam ); |
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76 |
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77 /** |
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78 * From CMMFCodec |
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79 * Codec reset function used to flush out status information when a |
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80 * reposition occurs. |
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81 * This is used if the codec requires resetting prior to use. |
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82 */ |
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83 virtual void ResetL(); |
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84 |
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85 /** |
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86 * From CMMFCodec |
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87 * Processes the data in the specified source buffer and writes the |
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88 * processed data to the specified destination buffer. |
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89 * This function is synchronous, when the function returns the data |
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90 * has been processed. The source buffer is converted to the appropriate |
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91 * coding type in the destination buffer. The buffers can be of any size, |
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92 * therefore there is no guarantee that all the source buffer can be |
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93 * processed to fill the destination buffer or that all the source buffer |
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94 * may be processed before the destination is full. This function |
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95 * therefore returns the number of source, and destination, bytes processed |
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96 * along with a process result code indicating completion status.This |
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97 * function is synchronous, when the function returns the data has been |
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98 * processed. The source buffer is converted to the appropriate coding type |
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99 * in the destination buffer. The buffers can be of any size, therefore |
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100 * there is no guarantee that all the source buffer can be processed to |
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101 * fill the destination buffer or that all the source buffer may be |
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102 * processed before the destination is full. This function therefore |
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103 * returns the number of source, and destination, bytes processed along |
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104 * with a process result code indicating completion status.The aSource and |
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105 * aSink buffers passed in are derived from CMMFBuffer. The buffer type |
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106 * (e.g. a CMMFDataBuffer) passed in should be supported by the codec |
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107 * otherwise this function should leave with KErrNotSupported. The |
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108 * position of the source buffer should be checked by calling the source |
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109 * buffer's Position() member which indicates the current source read |
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110 * position in bytes. The codec should start processing from the current |
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111 * source buffer read position. The position of the destination buffer |
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112 * should be checked by calling the destination buffer's Position() method |
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113 * which indicates the current destination write position in bytes. |
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114 * The codec should start writing to the destination buffer at the current |
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115 * destination buffer write position.This is a virtual function that each |
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116 * derived class must implement. |
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117 * @see enum TCodecProcessResult |
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118 * @param aSource |
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119 * The source buffer containing data to encode or decode. |
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120 * @param aDestination |
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121 * The destination buffer to hold the data after encoding or |
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122 * decoding. |
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123 * @return The result of the processing. |
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124 * @pre The function ConfigureL() should have been called. |
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125 */ |
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126 virtual TCodecProcessResult ProcessL( const CMMFBuffer& aSource, |
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127 CMMFBuffer& aDestination ); |
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128 |
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129 private: |
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130 |
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131 /** |
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132 * Default Constructor |
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133 */ |
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134 CAriAacLCEncMmfCodec(); |
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135 |
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136 /** |
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137 * Symbian 2nd phase constructor |
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138 */ |
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139 void ConstructL(); |
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140 |
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141 /** |
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142 * Update the result with result status, source bytes consumed |
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143 * and destination bytes added. |
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144 * @param aStatus |
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145 * status of the result like EProcessComplete |
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146 * @param aSrcBytesConsumed |
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147 * total bytes consumed from the source buffer |
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148 * @param aDstBytesAdded |
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149 * total bytes added to the destination buffer |
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150 * @return result of the processing |
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151 */ |
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152 TCodecProcessResult Result( |
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153 TCodecProcessResult::TCodecProcessResultStatus aStatus, |
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154 TInt aSrcBytesConsumed, TInt aDstBytesAdded ); |
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155 |
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156 /** |
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157 * Copy the bytes from internal output buffer to destination buffer |
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158 * @param aDst |
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159 * pointer to the destination buffer |
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160 * @param aDstBytesConsumed |
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161 * total bytes added to the destination buffer |
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162 * @return number of bytes copied to the destination buffer. |
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163 */ |
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164 TInt CopyToDstBuffer( CMMFDataBuffer* aDst, TInt& aDstBytesConsumed ); |
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165 |
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166 /** |
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167 * Copy the bytes from the source buffer to the internal input burrer |
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168 * @param aSrc |
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169 * pointer to the source buffer |
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170 * @param aSrcBytesConsumed |
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171 * total bytes consumed from the source buffer |
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172 * @return number bytes copied from the source buffer |
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173 */ |
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174 TInt CopyFromSrcBuffer(const CMMFDataBuffer* aSrc, |
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175 TInt& aSrcBytesConsumed ); |
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176 /** |
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177 * Shifts the data in the input internal buffer to start position |
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178 * @param aFromPos |
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179 * position from where data has to shift |
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180 * @param aToPos |
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181 * position to where data has to shift |
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182 */ |
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183 void ShiftData( TInt aFromPos, TInt aToPos ); |
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184 |
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185 private: //Data |
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186 |
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187 // Handle TO wrapper class |
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188 CAriAacLCEncWrapper* iCodec; |
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189 |
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190 TBool iConfigured; |
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191 TBool iHeaderGenerated; |
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192 TAacEncParam iParam; |
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193 //No of bytes of source to be provided to encoder to encode one frame |
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194 TInt iSrclenToProcess; |
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195 |
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196 /** |
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197 * Setting this flag indicates whether only one frame has to encoded at a |
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198 * time or encode till destination buffer is full |
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199 */ |
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200 TBool iFillBuffer; |
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201 TInt iInternalInputBufferResidueLen; |
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202 TInt iInternalOutputBufferResidueLen; |
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203 TUint8* iInternalInputBuffer; |
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204 TUint8* iInternalOutputBuffer; |
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205 TInt iInternalOutputBufferPos; |
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206 |
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207 }; |
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208 |
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209 #endif /* ARIAACLCENCMMFCODEC_H */ |