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1 // Copyright (c) 2001-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // source\server\mmfdatapath.h |
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15 // |
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16 // |
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17 |
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18 #ifndef MMFDATAPATH_H |
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19 #define MMFDATAPATH_H |
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20 |
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21 #include <mmf/common/mmfcontroller.h> |
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22 #include <mmf/server/mmfdatasource.h> |
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23 #include <mmf/server/mmfdatasink.h> |
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24 #include <mmf/server/mmfcodec.h> |
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25 #include <mmf/server/mmfbuffer.h> |
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26 #include <mmf/common/mmfutilities.h> |
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27 #include <mmf/server/mmfformat.h> |
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28 #include <mmf/server/mmfsubthreadbase.h> |
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29 |
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30 /** |
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31 * @publishedAll |
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32 * @deprecated |
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33 * |
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34 * Datapath general error code used when sending events to clients |
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35 */ |
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36 const TUid KMMFErrorCategoryDataPathGeneralError = {0x101F76DC}; |
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37 |
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38 |
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39 |
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40 /** |
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41 @publishedAll |
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42 @deprecated |
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43 |
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44 Abstract utility class that moves data from a single data source to a single data sink, via a codec if required. |
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45 |
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46 All functions are exported form the DLL and are virtual to allow plugins to define their own data paths. |
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47 */ |
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48 class CMMFDataPath : public CActive, |
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49 public MDataSink, |
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50 public MDataSource, |
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51 public MAsyncEventHandler |
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52 { |
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53 public: |
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54 |
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55 //CMMFDataPath constructor if codec Uid is not already known by CMMFController |
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56 //and there is no data path ambiguity - ie only one data path is possible |
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57 IMPORT_C static CMMFDataPath* NewL(MAsyncEventHandler& aEventHandler); |
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58 |
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59 //CMMFDataPath constructor if codec Uid is not already known by CMMFController |
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60 //and there is ambiguity ie more than one possible data path TMediaId used to select path |
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61 IMPORT_C static CMMFDataPath* NewL(TMediaId aMediaId, MAsyncEventHandler& aEventHandler); |
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62 |
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63 //CMMFDataPath constructor if codec Uid is already known by CMMFController |
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64 //and there is no data path ambiguity - ie only one data path is possible |
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65 IMPORT_C static CMMFDataPath* NewL(TUid aCodecUid, MAsyncEventHandler& aEventHandler); |
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66 |
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67 //CMMFDataPath constructor if codec Uid is already known by CMMFController |
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68 //and there is ambiguity ie more than one possible data path TMediaId used to select path |
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69 IMPORT_C static CMMFDataPath* NewL(TUid aCodecUid, TMediaId aMediaId, MAsyncEventHandler& aEventHandler); |
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70 |
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71 IMPORT_C virtual ~CMMFDataPath(); |
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72 |
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73 // Called when source and sink needs to be de-referenced |
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74 IMPORT_C virtual void ResetL(); |
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75 |
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76 //from MDataSink - CMMFData path is a sink to its MDataSource |
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77 IMPORT_C virtual void EmptyBufferL(CMMFBuffer* aBuffer, MDataSource* aSupplier, TMediaId aMediaId); //only required for an active push MDataSource requesting a buffer empty - not implemented |
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78 IMPORT_C virtual void BufferFilledL(CMMFBuffer* aBuffer); //called by the CMMFDataPath's MDataSource when it has filled the buffer |
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79 IMPORT_C virtual TBool CanCreateSinkBuffer(); //from both MDataSource & MDataSink? |
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80 IMPORT_C virtual CMMFBuffer* CreateSinkBufferL(TMediaId aMediaId); //CMMFDataPath can't create buffers |
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81 IMPORT_C virtual CMMFBuffer* CreateSinkBufferL(TMediaId aMediaId, TBool &aReference); //CMMFDataPath can't create buffers |
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82 |
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83 IMPORT_C virtual TFourCC SinkDataTypeCode(TMediaId aMediaId); |
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84 |
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85 //from MDataSource |
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86 IMPORT_C virtual void FillBufferL(CMMFBuffer* aBuffer, MDataSink* aConsumer, TMediaId aMediaId); //only required for an active pull MDataSink requesting buffer fill - not implementated |
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87 IMPORT_C virtual void BufferEmptiedL(CMMFBuffer* aBuffer);//called by the CMMFDataPath's MDataSink when it has emptied the buffer |
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88 IMPORT_C virtual TBool CanCreateSourceBuffer(); //from both MDataSource & MDataSink? |
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89 IMPORT_C virtual CMMFBuffer* CreateSourceBufferL(TMediaId aMediaId); //CMMFDataPath can't create buffers |
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90 IMPORT_C virtual CMMFBuffer* CreateSourceBufferL(TMediaId aMediaId, TBool &aReference); //CMMFDataPath can't create buffers |
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91 IMPORT_C virtual TFourCC SourceDataTypeCode(TMediaId aMediaId); |
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92 |
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93 IMPORT_C virtual void AddDataSourceL(MDataSource* aSource); |
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94 IMPORT_C virtual void AddDataSinkL(MDataSink* aSink); |
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95 |
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96 //could derive these from a mixin eg MMMFControle later for active MDataSource/Sinks |
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97 IMPORT_C virtual void PrimeL(); |
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98 IMPORT_C virtual void PlayL(); |
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99 IMPORT_C virtual void Pause(); |
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100 IMPORT_C virtual void Stop(); |
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101 |
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102 IMPORT_C virtual TTimeIntervalMicroSeconds Position() const; |
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103 IMPORT_C virtual void SetPositionL(const TTimeIntervalMicroSeconds& aPosition); |
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104 |
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105 // Play Window. |
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106 IMPORT_C virtual void SetPlayWindowL( const TTimeIntervalMicroSeconds& aStart, const TTimeIntervalMicroSeconds& aEnd ) ; |
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107 IMPORT_C virtual void ClearPlayWindowL() ; |
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108 |
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109 //State |
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110 IMPORT_C virtual TInt State(); |
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111 |
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112 //CActive implementations |
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113 IMPORT_C void RunL(); |
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114 IMPORT_C void DoCancel(); |
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115 IMPORT_C TInt RunError(TInt aError); |
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116 |
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117 //error handling |
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118 IMPORT_C TInt DoSendEventToClient(TUid aEventType, TInt aErrorCode); |
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119 |
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120 IMPORT_C TInt SetBlockLength(TUint aBlockLength); |
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121 /** |
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122 |
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123 Indicates the state of the data path. |
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124 |
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125 Mimics typical MultiMedia behaviour of stopped, primed and playing |
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126 */ |
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127 enum TDataPathState |
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128 { |
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129 /** Stopped. |
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130 */ |
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131 EStopped, |
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132 /** Primed. |
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133 */ |
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134 EPrimed, |
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135 /** Playing. |
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136 */ |
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137 EPlaying, |
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138 /** Recording. |
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139 */ |
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140 ERecording, |
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141 /** Converting. |
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142 */ |
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143 EConverting |
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144 }; |
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145 |
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146 /** |
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147 @internalComponent |
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148 */ |
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149 class CCompleteCallback : public CActive |
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150 { |
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151 public: |
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152 CCompleteCallback(CMMFDataPath& aDataPath, TBool aWaitForSink); |
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153 ~CCompleteCallback(); |
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154 |
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155 void SignalDataPathComplete(TInt aDataPathError); |
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156 void SignalSinkComplete(TInt aSinkError); |
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157 TRequestStatus& ActiveStatus(); |
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158 |
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159 void DoCancel(); |
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160 private: |
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161 void RunL(); |
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162 CMMFDataPath& iDataPath; |
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163 TBool iDataPathComplete; |
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164 TBool iSinkComplete; |
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165 TBool iWaitForSink; |
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166 |
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167 TInt iSinkError; |
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168 TInt iDataPathError; |
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169 }; |
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170 friend class CCompleteCallback; |
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171 friend class CMMFDataPath2; |
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172 protected: |
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173 |
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174 /** |
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175 Indicates the transfer state. |
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176 |
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177 Buffers maybe be filled, emptied, or have "one" shot initialisatings performed upon them. |
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178 |
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179 TTransferState is used within the datapath RunL which drives databuffer exchange. |
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180 */ |
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181 enum TTransferState |
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182 { |
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183 /** Waiting on a BufferEmptied callback from sink |
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184 */ |
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185 EWaitSink, |
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186 /** Waiting on a BufferFilled callback from source |
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187 */ |
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188 EWaitSource, |
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189 /** Initialize the sink. |
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190 */ |
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191 EInitializeSink, |
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192 /** Initialize the source. |
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193 */ |
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194 EInitializeSource, |
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195 /** Source buffer does not contain data. |
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196 */ |
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197 ENeedSourceData, |
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198 /** Sink buffer does not contain data. |
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199 */ |
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200 ENeedSinkData, |
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201 /** There is more source data to send to the sink and need to match sink and source. |
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202 */ |
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203 ENeedToMatchSourceToSink, |
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204 /** Outstanding data to send to sink. |
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205 */ |
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206 ESendDataToSink, |
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207 /** End of data. |
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208 */ |
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209 EEndOfData //indicates that the datapath has transferred all the data to the sink |
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210 }; |
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211 |
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212 |
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213 |
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214 |
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215 protected: |
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216 CMMFDataPath(TMediaId aMediaId, MAsyncEventHandler& aEventHandler) : |
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217 CActive(EPriorityStandard), MDataSink(KUidMmfDataPath), MDataSource(KUidMmfDataPath), |
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218 iEventHandler(aEventHandler), iMediaId(aMediaId), iState(EStopped) |
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219 {CActiveScheduler::Add(this);}; |
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220 |
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221 IMPORT_C void ConstructL(TUid aCodecUid = KNullUid); |
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222 IMPORT_C virtual void ConstructSourceL( const TDesC8& aInitData ) ; |
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223 IMPORT_C virtual void ConstructSinkL( const TDesC8& aInitData ) ; |
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224 IMPORT_C virtual void EndOfData(); |
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225 |
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226 //These methods use API on DevSound to determine how many samples have been played/recorded |
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227 //and thereby determine the real position. |
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228 TTimeIntervalMicroSeconds CalculateAudioOutputPosition() const; |
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229 TTimeIntervalMicroSeconds CalculateAudioInputPosition() const; |
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230 |
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231 //These methods determine the position of either the input or the output. |
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232 //The position may come from a format or from an audio input/output depending on |
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233 //the operation the datapath is doing (Playing (output), Recording & Converting (input)) |
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234 TTimeIntervalMicroSeconds OutputPosition() const; |
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235 TTimeIntervalMicroSeconds InputPosition() const; |
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236 |
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237 |
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238 //Determines what buffers are required (see TNeedBuffer) |
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239 //May leave KErrNotSupported if source/sinks can't supply the necessary buffers |
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240 TInt DetermineBuffersToUseL(void) const; |
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241 |
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242 //Determines how many samples have been played by DevSound |
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243 TInt AudioSamplesPlayed() const; |
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244 |
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245 //Determines how many samples have been recorded by DevSound |
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246 TInt AudioSamplesRecorded() const; |
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247 |
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248 |
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249 private: |
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250 void ChangeDataPathTransferState(TTransferState aNewDataPathTransferState); |
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251 void CreateDataPathL(MDataSource* aSource, MDataSink* aSink); |
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252 |
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253 void InitializeSinkL(); |
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254 void InitializeSourceL(); |
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255 void FillSourceBufferL(); |
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256 void FillSinkBufferL(); |
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257 void EmptySinkBufferL(); |
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258 void DoCleanupBuffers(); |
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259 void ObtainSyncBuffersL(); //tries to obtain synchronous data buffers from src/snk |
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260 |
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261 TTimeIntervalMicroSeconds Duration() const; |
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262 |
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263 void DoStopL(); |
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264 void DoPauseL(); |
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265 void DoEndOfDataL(); |
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266 |
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267 IMPORT_C TInt SendEventToClient(const TMMFEvent& aEvent); |
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268 |
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269 void SetBuffersAvailable(); |
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270 void ResetRefBuffers(); |
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271 |
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272 |
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273 |
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274 protected: |
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275 /** |
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276 Event handler. |
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277 */ |
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278 MAsyncEventHandler& iEventHandler; |
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279 |
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280 /** |
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281 The source of data to which the CMMFDataPath is a MDataSink for. |
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282 */ |
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283 MDataSource* iDataSource; |
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284 /** |
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285 The sink of data for which the CMMFDataPath is a MDataSource for |
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286 */ |
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287 MDataSink* iDataSink; |
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288 /** |
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289 Set to true when the sink is able to accept data. EFalse otherwise. |
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290 */ |
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291 TBool iSinkCanReceive; |
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292 /** |
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293 The sink's data type. Same as the codec input data type. |
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294 */ |
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295 TFourCC iSinkFourCC; |
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296 /** |
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297 The source's data type. Same as the codec output data type. |
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298 */ |
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299 TFourCC iSourceFourCC; |
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300 /** |
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301 Identifies which media type and stream within MDataSource. |
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302 */ |
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303 TMediaId iMediaId; |
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304 /** |
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305 Codec in use. Null Codec is signified by == NULL |
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306 */ |
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307 CMMFCodec* iCodec; |
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308 |
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309 /** |
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310 Result of processing the codec. |
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311 */ |
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312 TCodecProcessResult iCodecProcessResult; |
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313 |
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314 /** |
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315 Set to ETrue when the data path has a source and a sink and can send data from the source to the sink. |
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316 */ |
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317 TBool iDataPathCreated; |
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318 |
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319 /** |
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320 Current data path state. |
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321 @see TDataPathState |
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322 */ |
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323 TDataPathState iState; |
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324 |
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325 /** |
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326 Current transfer state. |
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327 @see TTransferState |
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328 */ |
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329 TTransferState iTransferState; |
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330 |
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331 /** |
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332 Set to true if data path has to use a supplied codec in its construction. |
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333 */ |
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334 TBool iUseSuppliedCodecUid; |
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335 |
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336 /** |
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337 This is set to point to whichever sink buffer is in use. |
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338 */ |
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339 CMMFBuffer* iSinkBuffer; |
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340 |
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341 /** |
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342 This is the pointer to whichever source buffer is in use |
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343 */ |
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344 CMMFBuffer* iSourceBuffer; |
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345 |
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346 /** |
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347 The source's position in terms of frames or some other time fixed parameter. |
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348 */ |
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349 TUint iCurrentSourceFrameNumber; |
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350 |
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351 /** |
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352 The sink's position in terms of frames or some other time fixed parameter. |
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353 */ |
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354 TUint iCurrentSinkFrameNumber; |
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355 |
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356 /** |
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357 Indicates that all data has been obtained from the source (ETrue if there is no more source data). |
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358 */ |
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359 TBool iNoMoreSourceData; |
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360 |
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361 /** |
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362 Indicates that all data has been sent to the sink. |
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363 */ |
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364 TBool iAllDataSentToSink; |
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365 |
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366 /** |
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367 Datapath completed because of an error; usually KErrNone. |
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368 */ |
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369 TUint iDataPathCompletedErrorCode; |
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370 |
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371 /** |
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372 Start position of the play window. |
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373 */ |
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374 TTimeIntervalMicroSeconds iPlayWindowStartPosition ; |
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375 |
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376 /** |
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377 End position of the play window. |
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378 */ |
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379 TTimeIntervalMicroSeconds iPlayWindowEndPosition ; |
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380 |
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381 /** |
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382 The position audio will start playing from. |
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383 When stopping, this is set to iPlayWindowStartPosition. |
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384 When pausing, this is set to the current position. |
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385 */ |
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386 TTimeIntervalMicroSeconds iStartPosition; |
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387 |
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388 /** |
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389 This value can be used to obtain the duration of the source when playing or converting. |
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390 This is an optimisation as this value will not change if we are playing or converting. |
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391 */ |
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392 TTimeIntervalMicroSeconds iCachedSourceDuration; |
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393 |
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394 |
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395 /** |
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396 ETrue if the source buffer is reference to object owned by someone else. |
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397 */ |
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398 TBool iSrcBufRef; |
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399 |
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400 /** |
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401 ETrue if sink buffer is reference to object owned by someone else |
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402 */ |
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403 TBool iSnkBufRef; |
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404 |
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405 /** |
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406 Indicates asynchrous buffers from AudioInput. |
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407 */ |
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408 TBool iObtainingAsyncSourceBuffer; |
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409 |
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410 /** |
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411 Indicates asynchrous buffers from AudioOutput. |
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412 */ |
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413 TBool iObtainingAsyncSinkBuffer; |
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414 |
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415 /** |
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416 Indicates DoPauseL() has been called. |
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417 */ |
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418 TBool iPauseCalled; |
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419 |
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420 /** |
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421 Flag to indicate that a buffer is with the source. |
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422 |
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423 This is necessary as it is imperrative that when a buffer is with the source, it must |
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424 not be referenced in any way. The reason for this is that it is not mandated that sources |
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425 maintain buffer references. For example, it is valid for DevSound to return recorded data in a |
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426 different buffer to the one supplied to it. |
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427 */ |
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428 TBool iSourceBufferWithSource; |
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429 |
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430 /** |
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431 Flag to indicate that a buffer is with the sink. |
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432 |
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433 This are necessary as it is imperrative that when a buffer is with the sink, it must |
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434 not be referenced in any way. The reason for this is that it is not mandated that sinks |
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435 maintain buffer references. For example, it is valid for DevSound to request more audio data in a |
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436 different buffer to the one supplied to it. |
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437 */ |
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438 TBool iSinkBufferWithSink; |
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439 |
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440 |
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441 /** |
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442 Holds the number of samples played on audio output at a point where we |
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443 want to reference play duration from. |
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444 */ |
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445 TInt iReferenceAudioSamplesPlayed; |
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446 |
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447 /** |
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448 Holds the number of samples recorded from audio input at a point where we |
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449 want to reference record duration from. |
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450 */ |
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451 TInt iReferenceAudioSamplesRecorded; |
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452 |
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453 /** |
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454 Pointer to internal callback completion class |
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455 */ |
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456 CCompleteCallback * iCompleteCallback; |
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457 |
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458 /** |
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459 This indicates what buffers are required in order to operate. |
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460 If a real Codec is in use, buffers are required from both source and sink, |
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461 else only one is required and source is preferred. |
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462 */ |
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463 enum TNeedBuffer |
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464 { |
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465 /** No buffers needed. |
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466 */ |
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467 ENoBuffers = 0x0, |
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468 /** Sink buffer needed. |
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469 */ |
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470 ENeedSinkBuffer = 0x01, |
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471 /** Source buffer needed. |
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472 */ |
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473 ENeedSourceBuffer = 0x10 |
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474 }; |
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475 |
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476 /** Holds the outcome of the call to DetermineBuffersToUseL |
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477 */ |
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478 TInt iBuffersToUse; |
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479 }; |
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480 |
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481 #endif |
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482 |