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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 * Implementation of member functions of Plugin class (CAriMp3DecMmfCodec). |
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16 * |
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17 */ |
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18 |
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19 // System includes |
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20 #include <ecom.h> |
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21 #include <ImplementationProxy.h> |
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22 // User includes |
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23 #include "arimp3decwrapper.h" |
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24 #include "arimp3decmmfcodec.h" |
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25 #include "arimp3decmmfcodec_uid.hrh" |
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26 #include "ariprint.h" |
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27 |
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28 //Maximum size of a single input frame in an Mp3 stream |
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29 const TInt KMinBytesInput = 1440; |
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30 |
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31 |
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32 // --------------------------------------------------------------------------- |
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33 // Two-phased constructor. |
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34 // Creates an instance of CAriMp3DecMmfCodec. |
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35 // Instance is not left on cleanup stack. |
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36 // --------------------------------------------------------------------------- |
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37 // |
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38 |
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39 CMMFCodec* CAriMp3DecMmfCodec::NewL() |
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40 { |
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41 PRINT_ENTRY; |
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42 CAriMp3DecMmfCodec* self = new ( ELeave ) CAriMp3DecMmfCodec(); |
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43 CleanupStack::PushL( self ); |
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44 self->ConstructL(); |
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45 CleanupStack::Pop( self ); |
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46 PRINT_EXIT; |
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47 return ( CMMFCodec* )self; |
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48 } |
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49 |
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50 // --------------------------------------------------------------------------- |
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51 // Destructor;Destroys the decoder instance and any internal buffers |
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52 // --------------------------------------------------------------------------- |
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53 // |
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54 |
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55 CAriMp3DecMmfCodec::~CAriMp3DecMmfCodec() |
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56 { |
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57 PRINT_ENTRY; |
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58 if ( iInternalInputBuffer ) |
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59 { |
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60 delete iInternalInputBuffer; |
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61 iInternalInputBuffer = NULL; |
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62 } |
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63 if ( iInternalOutputBuffer ) |
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64 { |
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65 delete iInternalOutputBuffer; |
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66 iInternalOutputBuffer = NULL; |
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67 } |
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68 |
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69 if ( iCodec ) |
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70 { |
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71 delete iCodec; |
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72 iCodec = NULL; |
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73 } |
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74 PRINT_EXIT; |
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75 } |
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76 |
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77 // --------------------------------------------------------------------------- |
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78 // From class CMMFCodec. |
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79 // The function Sets codec configuration. |
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80 // The value used for aConfigType must be KUidMmfCodecAudioSettings |
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81 // (defined in include\mmf\plugins\mmfCodecImplementationUIDs.hrh) |
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82 // --------------------------------------------------------------------------- |
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83 // |
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84 |
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85 void CAriMp3DecMmfCodec::ConfigureL( TUid /*aConfigType*/, |
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86 const TDesC8& /*aParam*/ ) |
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87 { |
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88 PRINT_ENTRY; |
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89 PRINT_EXIT; |
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90 } |
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91 |
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92 // -------------------------------------------------------------------------- |
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93 // From class CMMFCodec. |
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94 // This function is used to flush out status information when a |
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95 // reposition occurs. |
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96 // This is used if the codec requires resetting prior to use. |
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97 // -------------------------------------------------------------------------- |
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98 // |
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99 |
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100 void CAriMp3DecMmfCodec::ResetL() |
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101 { |
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102 PRINT_ENTRY; |
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103 iInternalInputBufferResidueLen = 0; |
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104 iInternalOutputBufferPos = 0; |
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105 iInternalOutputBufferResidueLen = 0; |
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106 PRINT_EXIT; |
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107 } |
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108 |
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109 //--------------------------------------------------------------------------- |
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110 // From class CMMFCodec. |
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111 // This function is used to decode the given source and fill the |
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112 // destination buffer with the decode data. |
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113 // The buffers can be of any size. Since the buffers can be of any size |
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114 // there is no guarantee that all the source buffer can be processed to |
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115 // fill the destination buffer or that the all the source buffer may be |
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116 // processed before the destination is full. Therefore the ProcessL needs |
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117 // to return a TCodecProcessResult returing the number of source bytes |
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118 // processed and the number of destination bytes processed along with a |
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119 // process result code defined thus: |
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120 // - EProcessComplete: the codec processed all the source data into the |
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121 // sink buffer |
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122 // - EProcessIncomplete: the codec filled sink buffer before all the source |
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123 // buffer was processed |
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124 // - EDstNotFilled: the codec processed the source buffer but the sink |
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125 // buffer was not filled |
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126 // - EEndOfData: the codec detected the end data - all source data in |
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127 // processed but sink may not be full |
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128 // - EProcessError: the codec process error condition |
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129 // |
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130 // The ProcessL should start processing the source buffer from the iPosition |
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131 // data member of the source data and start filling the destination buffer |
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132 // from its iPosition. |
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133 //--------------------------------------------------------------------------- |
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134 // |
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135 |
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136 TCodecProcessResult CAriMp3DecMmfCodec::ProcessL( const CMMFBuffer& aSrc, |
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137 CMMFBuffer& aDst ) |
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138 { |
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139 PRINT_ENTRY; |
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140 // total decoded bytes added to the dst buffer |
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141 TInt totalDstBytesAdded = 0; |
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142 // total src bytes added to the internal src buffer |
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143 TInt totalSrcBytesCopied = 0; |
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144 // temporary variable to use for copying the sorce or destination data |
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145 TInt numberOfBytesCopied; |
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146 // Flag for finding valid sync |
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147 TBool syncFound = EFalse; |
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148 |
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149 /** |
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150 * Process the dst buffer, update the dstBufferPos and check |
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151 * whether dst buffer is NULL or not. |
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152 */ |
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153 CMMFDataBuffer* dst = static_cast<CMMFDataBuffer*>( &aDst ); |
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154 |
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155 const TInt dstMaxLen = dst->Data().MaxLength(); |
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156 TUint8* dstPtr = const_cast<TUint8*>( dst->Data().Ptr() ); |
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157 TInt dstBufferPos = dst->Position(); |
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158 |
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159 /** |
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160 * Process the src buffer, update srcbuffer length, position and |
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161 * flag for last frame. check whether src buffer is NULL or not |
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162 * and check src buffer contains any data |
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163 */ |
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164 const CMMFDataBuffer* src = static_cast<const CMMFDataBuffer*>( &aSrc ); |
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165 |
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166 TUint8* srcPtr = const_cast <TUint8*>( src->Data().Ptr() ); |
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167 TInt srcBufferLen = src->Data().Length(); |
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168 TInt srcBufferPos = src->Position(); |
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169 TBool lastFrame = src->LastBuffer(); |
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170 |
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171 if ( srcBufferLen == 0 && iInternalInputBufferResidueLen == 0 ) |
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172 { |
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173 PRINT_ERR( "source buffer length is zero" ); |
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174 User::Leave( KErrArgument ); |
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175 } |
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176 |
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177 /** |
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178 * if any destination bytes from internal destination buffer is not |
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179 * given to the dst buffer from the previous call, give it to the |
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180 * dst buffer. After this block, it ensures that no bytes are remaining |
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181 * in the internal destination buffer. |
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182 */ |
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183 if ( iInternalOutputBufferResidueLen - iInternalOutputBufferPos > 0 ) |
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184 { |
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185 numberOfBytesCopied = CopyToDstBuffer( dst, totalDstBytesAdded ); |
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186 |
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187 if ( iInternalOutputBufferResidueLen - iInternalOutputBufferPos > 0 ) |
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188 { |
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189 PRINT_EXIT; |
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190 return Result( TCodecProcessResult::EProcessIncomplete, |
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191 totalSrcBytesCopied, totalDstBytesAdded ); |
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192 } |
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193 else |
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194 { |
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195 if ( ( lastFrame ) && ( srcBufferLen - srcBufferPos == 0 )&& |
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196 ( iInternalInputBufferResidueLen == 0 ) ) |
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197 { |
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198 iInternalOutputBufferResidueLen = 0; |
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199 iInternalInputBufferResidueLen = 0; |
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200 iInternalOutputBufferPos = 0; |
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201 PRINT_EXIT; |
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202 return Result( TCodecProcessResult::EEndOfData, |
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203 totalSrcBytesCopied, totalDstBytesAdded ); |
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204 } |
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205 iInternalOutputBufferPos = 0; |
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206 iInternalOutputBufferResidueLen = 0; |
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207 } |
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208 } |
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209 |
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210 /** |
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211 * copy the src buffer data into the internal buffer till internal buffer |
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212 * holds minimum bytes to process i.e KMinBytesInput. After this block, it |
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213 * ensures that internal source buffer holds KMinBytesInput. |
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214 * if it is a last frame, treat remaining residual buffer as internal |
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215 * buffer. |
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216 */ |
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217 if ( ( KMinBytesInput - iInternalInputBufferResidueLen > 0 ) |
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218 && ( srcBufferLen - srcBufferPos > 0 ) ) |
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219 { |
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220 numberOfBytesCopied = CopyFromSrcBuffer( src, totalSrcBytesCopied ); |
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221 } |
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222 |
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223 if ( ( KMinBytesInput > iInternalInputBufferResidueLen ) |
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224 && ( !lastFrame ) ) |
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225 { |
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226 PRINT_EXIT; |
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227 return Result( TCodecProcessResult::EDstNotFilled, |
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228 srcBufferLen - srcBufferPos, totalDstBytesAdded ); |
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229 } |
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230 |
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231 /** |
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232 * process the src buffer till destination buffer or source buffer |
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233 * or both buffers are exhausted. |
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234 */ |
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235 do |
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236 { |
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237 /** |
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238 * call seeksync to find the valid fram start offset i.e syncpos. |
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239 * update internal buffer position to that offset position if it is |
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240 * success.if it is failed then there is no valid frame start in |
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241 * the available buffer. Go for new src buffer. all bytes present |
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242 * in the internal buffer are discarded. |
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243 */ |
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244 TInt syncpos; |
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245 TInt srcBufferRemainingBytes = srcBufferLen |
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246 - srcBufferPos |
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247 - totalSrcBytesCopied; |
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248 TInt dstBufferRemainingBytes = dstMaxLen |
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249 - dstBufferPos |
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250 - totalDstBytesAdded; |
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251 TInt internalInputBufferPos = 0; |
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252 |
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253 if ( KErrNone != iCodec->SeekSync( |
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254 &iInternalInputBuffer[internalInputBufferPos], |
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255 ( iInternalInputBufferResidueLen - internalInputBufferPos ), |
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256 syncpos ) ) |
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257 { |
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258 TCodecProcessResult result = GetNewData( src, totalSrcBytesCopied, |
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259 totalDstBytesAdded ); |
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260 |
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261 if ( result.iStatus == TCodecProcessResult::EDstNotFilled || |
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262 result.iStatus == TCodecProcessResult::EEndOfData ) |
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263 { |
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264 return result; |
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265 } |
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266 } |
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267 else |
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268 { |
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269 syncFound = ETrue; |
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270 internalInputBufferPos += syncpos; |
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271 } |
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272 /** |
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273 * call GetFrameInfo to find whether valid frame is present in the |
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274 * availabel buffer.if it is success and framelength is 0 then |
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275 * there is no valid frame is present, discard the present buffer |
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276 * till sync position and add new buffer. |
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277 */ |
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278 if ( syncFound ) |
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279 { |
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280 TInt frameLen; |
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281 TMp3FrameInfo frameInfo; |
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282 if ( KErrNone != iCodec->GetFrameInfo( |
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283 &iInternalInputBuffer[internalInputBufferPos], |
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284 ( iInternalInputBufferResidueLen - internalInputBufferPos ), |
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285 frameLen, frameInfo ) ) |
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286 { |
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287 PRINT_ERR( "Decoder Getframeinfo failed" ); |
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288 User::Leave( KErrGeneral ); |
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289 } |
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290 if ( frameLen == 0 ) |
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291 { |
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292 TCodecProcessResult result = GetNewData( src, |
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293 totalSrcBytesCopied, totalDstBytesAdded ); |
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294 |
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295 if ( result.iStatus == TCodecProcessResult::EDstNotFilled || |
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296 result.iStatus == TCodecProcessResult::EEndOfData ) |
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297 { |
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298 return result; |
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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 * if the buffer has less than framelen then fill the internal |
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304 * sorce buffer with KMinBytesInput bytes. |
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305 */ |
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306 if ( frameLen > ( iInternalInputBufferResidueLen |
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307 - internalInputBufferPos ) ) |
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308 { |
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309 if( lastFrame ) |
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310 { |
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311 iInternalInputBufferResidueLen = 0; |
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312 iInternalOutputBufferResidueLen = 0; |
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313 iInternalOutputBufferPos = 0; |
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314 PRINT_EXIT; |
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315 return Result( |
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316 TCodecProcessResult::EEndOfData, |
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317 totalSrcBytesCopied, totalDstBytesAdded ); |
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318 } |
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319 |
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320 ShiftData( internalInputBufferPos, 0 ); |
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321 numberOfBytesCopied = CopyFromSrcBuffer( src, |
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322 totalSrcBytesCopied ); |
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323 internalInputBufferPos = 0; |
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324 |
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325 if ( iInternalInputBufferResidueLen < KMinBytesInput ) |
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326 { |
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327 PRINT_EXIT; |
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328 return Result( |
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329 TCodecProcessResult::EDstNotFilled, |
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330 totalSrcBytesCopied, totalDstBytesAdded ); |
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331 } |
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332 } |
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333 |
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334 /** |
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335 * initialize the variables like srcUsed and dstLen accordingly. |
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336 * call Decode. |
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337 */ |
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338 |
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339 TInt srcUsed = iInternalInputBufferResidueLen |
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340 - internalInputBufferPos; |
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341 TInt dstLen = iOutFrameSize; |
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342 |
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343 TInt error = iCodec->Decode( |
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344 &iInternalInputBuffer[internalInputBufferPos], |
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345 srcUsed, iInternalOutputBuffer, dstLen ); |
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346 |
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347 if ( KErrNone != error ) |
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348 { |
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349 iInternalInputBufferResidueLen = 0; |
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350 PRINT_ERR( error ); |
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351 return Result( |
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352 TCodecProcessResult::EProcessError, |
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353 totalSrcBytesCopied, totalDstBytesAdded ); |
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354 } |
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355 |
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356 /** |
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357 * Fill Destination Buffer |
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358 */ |
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359 |
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360 iInternalOutputBufferResidueLen = dstLen; |
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361 numberOfBytesCopied = CopyToDstBuffer( dst, totalDstBytesAdded ); |
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362 dstBufferRemainingBytes -= numberOfBytesCopied; |
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363 |
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364 /*** |
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365 * Fill Sorce Buffer |
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366 */ |
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367 |
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368 internalInputBufferPos += srcUsed ; |
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369 ShiftData( internalInputBufferPos, 0 ); |
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370 numberOfBytesCopied = CopyFromSrcBuffer( src, |
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371 totalSrcBytesCopied ); |
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372 srcBufferRemainingBytes -= numberOfBytesCopied; |
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373 internalInputBufferPos = 0; |
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374 |
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375 /*** |
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376 * check four conditions if else for src and if else for dst |
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377 */ |
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378 |
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379 // src buffer has available bytes to decode |
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380 if ( srcBufferRemainingBytes > 0 ) |
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381 { |
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382 if ( dstBufferRemainingBytes == 0 ) |
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383 { |
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384 PRINT_EXIT; |
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385 return Result( TCodecProcessResult::EProcessIncomplete, |
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386 totalSrcBytesCopied, totalDstBytesAdded ); |
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387 } |
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388 } |
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389 |
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390 else |
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391 { |
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392 // dst buffer has availabe space for decoded bytes |
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393 if ( dstBufferRemainingBytes > 0 ) |
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394 { |
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395 // last frame of the input stream |
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396 if ( lastFrame ) |
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397 { |
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398 if ( iInternalInputBufferResidueLen == 0 ) |
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399 { |
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400 PRINT_EXIT; |
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401 return Result( TCodecProcessResult::EEndOfData, |
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402 totalSrcBytesCopied, totalDstBytesAdded ); |
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403 } |
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404 } |
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405 else |
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406 { |
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407 PRINT_EXIT; |
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408 return Result( TCodecProcessResult::EDstNotFilled, |
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409 totalSrcBytesCopied, totalDstBytesAdded ); |
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410 } |
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411 } |
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412 else |
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413 { |
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414 /** |
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415 *internal output buffer has decoded bytes which is not |
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416 *given to dst buffer. |
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417 */ |
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418 if ( iInternalOutputBufferResidueLen |
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419 - iInternalOutputBufferPos > 0 ) |
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420 { |
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421 PRINT_EXIT; |
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422 return Result( |
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423 TCodecProcessResult::EProcessIncomplete, |
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424 totalSrcBytesCopied, totalDstBytesAdded ); |
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425 } |
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426 // last frame of the input stream |
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427 else if ( lastFrame ) |
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428 { |
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429 // if internal buffer has available bytes to decode |
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430 if ( iInternalInputBufferResidueLen > 0 ) |
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431 { |
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432 PRINT_EXIT; |
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433 return Result( |
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434 TCodecProcessResult::EProcessIncomplete, |
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435 totalSrcBytesCopied, totalDstBytesAdded ); |
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436 } |
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437 else |
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438 { |
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439 iInternalInputBufferResidueLen = 0; |
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440 PRINT_EXIT; |
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441 return Result( |
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442 TCodecProcessResult::EEndOfData, |
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443 totalSrcBytesCopied, totalDstBytesAdded ); |
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444 } |
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445 } |
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446 else |
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447 { |
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448 PRINT_EXIT; |
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449 return Result( |
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450 TCodecProcessResult::EProcessComplete, |
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451 totalSrcBytesCopied, totalDstBytesAdded ); |
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452 } |
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453 } |
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454 } |
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455 } |
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456 }while ( 1 ); |
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457 } |
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458 |
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459 //---------------------------------------------------------------------------- |
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460 // Default constructor for performing 1st stage construction. |
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461 // Should not contain any code that could leave. |
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462 //---------------------------------------------------------------------------- |
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463 // |
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464 |
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465 CAriMp3DecMmfCodec::CAriMp3DecMmfCodec(): |
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466 iCodec( NULL ), iInternalInputBufferResidueLen( 0 ), |
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467 iInternalOutputBufferResidueLen( 0 ), iOutFrameSize( 0 ), |
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468 iInternalInputBuffer( NULL ), iInternalOutputBuffer( NULL ), |
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469 iInternalOutputBufferPos( 0 ) |
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470 { |
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471 PRINT_ENTRY; |
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472 PRINT_EXIT; |
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473 } |
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474 |
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475 //---------------------------------------------------------------------------- |
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476 // Second phase of the two-phased constructor. |
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477 // Creates an instance of decoder |
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478 //---------------------------------------------------------------------------- |
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479 // |
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480 |
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481 void CAriMp3DecMmfCodec::ConstructL() |
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482 { |
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483 PRINT_ENTRY; |
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484 TMp3FrameInfo frameInfo; |
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485 |
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486 TRAPD( creatErr,iCodec = CAriMp3DecWrapper::NewL() ); |
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487 if( KErrNone != creatErr ) |
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488 { |
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489 PRINT_ERR( creatErr ); |
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490 User::Leave( creatErr ); |
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491 } |
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492 |
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493 User::LeaveIfError( iCodec->Reset() ); |
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494 |
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495 TInt frameLength; |
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496 |
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497 User::LeaveIfError( iCodec->GetMaxFrameInfo( frameLength, frameInfo ) ); |
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498 |
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499 iOutFrameSize = frameInfo.iBufferSize; |
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500 |
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501 iInternalInputBuffer = new( ELeave ) TUint8[KMinBytesInput]; |
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502 if ( !iInternalInputBuffer ) |
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503 { |
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504 PRINT_ERR( "iInternalInputBuffer is not created" ); |
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505 User::Leave( KErrNoMemory ); |
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506 } |
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507 |
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508 iInternalOutputBuffer = new( ELeave ) TUint8[iOutFrameSize]; |
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509 if ( !iInternalOutputBuffer ) |
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510 { |
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511 PRINT_ERR( "iInternalOutputBuffer is not created" ); |
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512 User::Leave( KErrNoMemory ); |
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513 } |
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514 } |
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515 |
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516 //---------------------------------------------------------------------------- |
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517 // Updates the result of the processing |
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518 //---------------------------------------------------------------------------- |
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519 // |
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520 TCodecProcessResult CAriMp3DecMmfCodec::Result( |
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521 TCodecProcessResult::TCodecProcessResultStatus aStatus, |
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522 TInt aSrcBytesConsumed, TInt aDstBytesAdded ) |
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523 |
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524 { |
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525 PRINT_ENTRY; |
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526 TCodecProcessResult result; |
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527 // update destination bytes |
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528 result.iDstBytesAdded = aDstBytesAdded; |
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529 // update source bytes |
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530 result.iSrcBytesProcessed = aSrcBytesConsumed; |
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531 |
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532 // update status |
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533 switch ( aStatus ) |
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534 { |
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535 case TCodecProcessResult::EProcessComplete: |
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536 result.iStatus = TCodecProcessResult::EProcessComplete; |
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537 break; |
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538 case TCodecProcessResult::EProcessIncomplete: |
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539 result.iStatus = TCodecProcessResult::EProcessIncomplete; |
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540 break; |
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541 case TCodecProcessResult::EEndOfData: |
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542 result.iStatus = TCodecProcessResult::EEndOfData; |
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543 break; |
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544 case TCodecProcessResult::EDstNotFilled: |
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545 result.iStatus = TCodecProcessResult::EDstNotFilled; |
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546 break; |
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547 case TCodecProcessResult::EProcessError: |
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548 result.iStatus = TCodecProcessResult::EProcessError; |
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549 break; |
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550 default: |
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551 result.iStatus = TCodecProcessResult::EProcessError; |
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552 break; |
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553 } |
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554 PRINT_MSG( LEVEL_HIGH, ( "result.iSrcBytesProcessed = %d", |
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555 result.iSrcBytesProcessed ) ); |
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556 PRINT_MSG( LEVEL_HIGH, ( "result.iDstBytesAdded = %d", |
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557 result.iDstBytesAdded ) ); |
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558 PRINT_MSG( LEVEL_HIGH, ( "result.iStatus = %d", |
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559 result.iStatus ) ); |
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560 PRINT_EXIT; |
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561 return result; |
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562 } |
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563 |
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564 //---------------------------------------------------------------------------- |
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565 // Copy the bytes to destination buffer from the internal buffer |
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566 // first checks whether the number of bytes to be copied is lesser of the |
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567 // destination buffer reamining bytes and internal input internal remaining |
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568 // remaining bytes and then copies that many bytes. |
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569 //---------------------------------------------------------------------------- |
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570 // |
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571 TInt CAriMp3DecMmfCodec::CopyToDstBuffer( CMMFDataBuffer* aDst, |
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572 TInt &aDstBytesConsumed ) |
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573 { |
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574 PRINT_ENTRY; |
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575 TInt numberOfBytesToBeCopied; |
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576 const TInt dstMaxLen = aDst->Data().MaxLength(); |
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577 TUint8* dstPtr = const_cast<TUint8*>( aDst->Data().Ptr() ); |
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578 TInt dstBufferPos = aDst->Position(); |
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579 |
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580 // destination buffer remaining bytes |
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581 TInt dstBufferRemainingBytes = dstMaxLen |
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582 - dstBufferPos |
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583 - aDstBytesConsumed; |
|
584 // internal output buffer remaining bytes |
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585 TInt internalOutputBufferRemainingBytes = |
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586 iInternalOutputBufferResidueLen |
|
587 - iInternalOutputBufferPos; |
|
588 |
|
589 if ( internalOutputBufferRemainingBytes > dstBufferRemainingBytes ) |
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590 { |
|
591 numberOfBytesToBeCopied = dstBufferRemainingBytes; |
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592 } |
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593 else |
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594 { |
|
595 numberOfBytesToBeCopied = internalOutputBufferRemainingBytes; |
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596 iInternalOutputBufferResidueLen = 0; |
|
597 } |
|
598 |
|
599 // copy data to destination buffer from internal ouput buffer |
|
600 Mem::Copy( dstPtr + dstBufferPos + aDstBytesConsumed, |
|
601 iInternalOutputBuffer + iInternalOutputBufferPos, |
|
602 numberOfBytesToBeCopied ); |
|
603 |
|
604 // update internal output buffer position |
|
605 if( iInternalOutputBufferResidueLen ) |
|
606 { |
|
607 iInternalOutputBufferPos += dstBufferRemainingBytes; |
|
608 } |
|
609 else |
|
610 { |
|
611 iInternalOutputBufferPos = 0; |
|
612 } |
|
613 |
|
614 aDstBytesConsumed += numberOfBytesToBeCopied; |
|
615 aDst->Data().SetLength( dstBufferPos + aDstBytesConsumed ); |
|
616 PRINT_EXIT; |
|
617 return numberOfBytesToBeCopied; |
|
618 } |
|
619 |
|
620 //--------------------------------------------------------------------------- |
|
621 // Copy the bytes from the source buffer to the internal input buffer. |
|
622 // first it checks number of bytes to be copied is lesser of the source buffer |
|
623 // remaining bytes or internal input buffer remaining bytes and then copies |
|
624 // that many bytes. |
|
625 //--------------------------------------------------------------------------- |
|
626 // |
|
627 TInt CAriMp3DecMmfCodec::CopyFromSrcBuffer( const CMMFDataBuffer* aSrc, |
|
628 TInt &aSrcBytesConsumed ) |
|
629 { |
|
630 PRINT_ENTRY; |
|
631 TInt numberOfBytesToBeCopied; |
|
632 TUint8* srcPtr = const_cast <TUint8*>( aSrc->Data().Ptr() ); |
|
633 TInt srcBufferLen = aSrc->Data().Length(); |
|
634 TInt srcBufferPos = aSrc->Position(); |
|
635 |
|
636 // calculate the source buffer remaining bytes |
|
637 TInt srcBufferRemainingBytes = srcBufferLen - srcBufferPos |
|
638 - aSrcBytesConsumed; |
|
639 |
|
640 // calculate internal input buffer remaining bytes |
|
641 TInt internalInputBufferRemaingBytes = KMinBytesInput |
|
642 - iInternalInputBufferResidueLen; |
|
643 |
|
644 if ( internalInputBufferRemaingBytes > srcBufferRemainingBytes ) |
|
645 { |
|
646 numberOfBytesToBeCopied = srcBufferRemainingBytes; |
|
647 } |
|
648 else |
|
649 { |
|
650 numberOfBytesToBeCopied = internalInputBufferRemaingBytes; |
|
651 } |
|
652 |
|
653 // copy data from source buffer to internal input buffer |
|
654 Mem::Copy( iInternalInputBuffer + iInternalInputBufferResidueLen, |
|
655 srcPtr + srcBufferPos + aSrcBytesConsumed, |
|
656 numberOfBytesToBeCopied ); |
|
657 |
|
658 // update internal input buffer residue length |
|
659 iInternalInputBufferResidueLen += numberOfBytesToBeCopied; |
|
660 aSrcBytesConsumed += numberOfBytesToBeCopied; |
|
661 PRINT_EXIT; |
|
662 return numberOfBytesToBeCopied; |
|
663 } |
|
664 //--------------------------------------------------------------------------- |
|
665 // Moves the data of the internal input buffer to the start position |
|
666 //--------------------------------------------------------------------------- |
|
667 // |
|
668 void CAriMp3DecMmfCodec::ShiftData( TInt aFromPos, TInt aToPos ) |
|
669 { |
|
670 PRINT_ENTRY; |
|
671 for ( TInt i = aToPos; i < ( iInternalInputBufferResidueLen - aFromPos ); |
|
672 i++ ) |
|
673 { |
|
674 iInternalInputBuffer[i] = iInternalInputBuffer[i + aFromPos]; |
|
675 } |
|
676 iInternalInputBufferResidueLen -= aFromPos; |
|
677 PRINT_EXIT; |
|
678 } |
|
679 //--------------------------------------------------------------------------- |
|
680 // Gets the new data from the source buffer. |
|
681 // checks whether it is last buffer from the source buffer and copies the data |
|
682 // and then checks if source buffer remianing bytes are not and returns the |
|
683 // result of the processing. |
|
684 //--------------------------------------------------------------------------- |
|
685 // |
|
686 TCodecProcessResult CAriMp3DecMmfCodec::GetNewData( |
|
687 const CMMFDataBuffer* aSrc, |
|
688 TInt &aSrcBytesConsumed, TInt &aDstBytesConsumed ) |
|
689 { |
|
690 PRINT_ENTRY; |
|
691 TUint8* srcPtr = const_cast <TUint8*>( aSrc->Data().Ptr() ); |
|
692 TInt srcBufferLen = aSrc->Data().Length(); |
|
693 TInt srcBufferPos = aSrc->Position(); |
|
694 TBool lastFrame = aSrc->LastBuffer(); |
|
695 // calculate source buffer remaining bytes |
|
696 TInt srcBufferRemainingBytes = srcBufferLen - srcBufferPos |
|
697 - aSrcBytesConsumed; |
|
698 |
|
699 TCodecProcessResult result; |
|
700 result.iStatus = TCodecProcessResult::EProcessError; |
|
701 |
|
702 // if it is last frame return end of data |
|
703 if ( ( lastFrame ) && ( srcBufferRemainingBytes == 0 ) ) |
|
704 { |
|
705 iInternalInputBufferResidueLen = 0; |
|
706 iInternalOutputBufferResidueLen = 0; |
|
707 iInternalOutputBufferPos = 0; |
|
708 PRINT_EXIT; |
|
709 return Result( TCodecProcessResult::EEndOfData, |
|
710 aSrcBytesConsumed, aDstBytesConsumed ); |
|
711 } |
|
712 else |
|
713 { |
|
714 iInternalInputBufferResidueLen = 0; |
|
715 TInt numberOfBytesToBeCopied = CopyFromSrcBuffer( aSrc, |
|
716 aSrcBytesConsumed ); |
|
717 |
|
718 if ( iInternalInputBufferResidueLen < KMinBytesInput ) |
|
719 { |
|
720 PRINT_EXIT; |
|
721 return Result( TCodecProcessResult::EDstNotFilled, |
|
722 aSrcBytesConsumed, aDstBytesConsumed ); |
|
723 } |
|
724 } |
|
725 PRINT_EXIT; |
|
726 return result; |
|
727 } |
|
728 /* __________________________________________________________________________ |
|
729 * Exported proxy for instantiation method resolution |
|
730 * Define the interface UIDs |
|
731 */ |
|
732 |
|
733 const TImplementationProxy ImplementationTable[] = |
|
734 { |
|
735 IMPLEMENTATION_PROXY_ENTRY( KUidMp3DecCodecImplUid, |
|
736 CAriMp3DecMmfCodec::NewL ) |
|
737 }; |
|
738 |
|
739 EXPORT_C const TImplementationProxy* ImplementationGroupProxy( |
|
740 TInt& aTableCount ) |
|
741 { |
|
742 PRINT_ENTRY; |
|
743 aTableCount = sizeof( ImplementationTable ) |
|
744 / sizeof( TImplementationProxy ); |
|
745 PRINT_EXIT; |
|
746 return ImplementationTable; |
|
747 } |
|
748 |
|
749 //--------------------------------------------------------------------------- |
|
750 // End of File |
|
751 //--------------------------------------------------------------------------- |