1 /* |
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2 * Copyright (c) 2007 Nokia Corporation 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 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: Base methods/variables for RTP file format recording.* |
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15 */ |
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16 |
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17 |
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18 |
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19 |
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20 #ifndef CRTPFILEBASE_H |
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21 #define CRTPFILEBASE_H |
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22 |
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23 // INCLUDES |
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24 #include <ipvideo/CRtpUtil.h> |
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25 #include <f32file.h> |
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26 |
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27 // CONSTANTS |
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28 const TInt KCurrentClipVersion( 3 ); |
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29 const TInt KMinValidClipVersion( 2 ); |
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30 const TInt KSeekHeaderBytes( 3 * KIntegerBytes ); |
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31 const TInt KGroupHeaderBytes( 4 * KIntegerBytes ); |
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32 const TInt KPacketsCountBytes( 4 ); |
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33 const TInt KNormalRecGroupLength( 2000 ); // 2 s |
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34 const TUint KSeekArrayInterval( 30000 ); // 30 s |
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35 |
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36 // MACROS |
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37 // None |
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38 |
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39 // DATA TYPES |
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40 // None |
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41 |
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42 // FORWARD DECLARATIONS |
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43 // None |
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44 |
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45 // CLASS DECLARATION |
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46 |
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47 /** |
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48 * RTP format common functionalities. |
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49 * |
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50 * @lib RtpClipHandler.lib |
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51 * @since Series 60 3.0 |
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52 */ |
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53 class CRtpFileBase : public CActive |
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54 { |
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55 |
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56 public: // Data types |
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57 |
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58 // Time shift seek array |
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59 class STimeShiftSeek |
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60 { |
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61 |
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62 public: // Data |
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63 |
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64 /** |
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65 * Group time. |
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66 */ |
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67 TUint iGroupTime; |
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68 |
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69 /** |
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70 * File seek point. |
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71 */ |
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72 TInt iSeekpoint; |
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73 |
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74 /** |
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75 * File name index. |
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76 */ |
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77 TInt iNameIndex; |
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78 |
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79 }; |
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80 |
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81 |
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82 public: // Constructors and destructor |
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83 |
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84 /** |
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85 * Destructor. |
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86 */ |
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87 virtual ~CRtpFileBase(); |
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88 |
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89 protected: // Constructors and destructor |
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90 |
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91 /** |
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92 * C++ default constructor. |
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93 */ |
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94 CRtpFileBase(); |
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95 |
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96 /** |
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97 * Symbian 2nd phase constructor can leave and is private by default. |
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98 */ |
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99 void ConstructL(); |
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100 |
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101 protected: // Enumeration |
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102 |
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103 // Defines RTP file mode |
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104 enum TRtpFileMode |
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105 { |
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106 EModeNone = KErrBadHandle, |
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107 EModeNormal = KErrNone, |
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108 EModeHandle, |
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109 EModeTimeShift |
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110 }; |
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111 |
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112 public: // New functions |
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113 |
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114 /** |
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115 * Deletes time shift files. |
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116 * @since Series 60 3.0 |
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117 * @param aShiftSeek a reference to time shift seek array. |
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118 * @return None. |
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119 */ |
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120 void DeleteTimeShiftFiles( RArray<STimeShiftSeek>& aShiftSeek ); |
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121 |
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122 protected: // New functions |
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123 |
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124 /** |
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125 * Writes RTP seek header to a file. |
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126 * @since Series 60 3.0 |
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127 * @return None. |
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128 */ |
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129 void WriteSeekHeaderL(); |
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130 |
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131 /** |
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132 * Reads clip's seek header from a file. |
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133 * @since Series 60 3.0 |
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134 * @return None. |
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135 */ |
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136 void ReadSeekHeaderL(); |
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137 |
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138 /** |
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139 * Reads clip's group header from a file. |
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140 * @since Series 60 3.0 |
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141 * @return None. |
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142 */ |
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143 void ReadGroupHeaderL(); |
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144 |
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145 /** |
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146 * Updates group header variables from readed data. |
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147 * @since Series 60 3.0 |
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148 * @param aDataPtr data from which header is updated. |
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149 * @return None. |
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150 */ |
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151 void UpdateGroupHeaderVariablesL( const TDesC8& aDataPtr ); |
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152 |
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153 /** |
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154 * Appends one group to the seek array. |
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155 * @since Series 60 3.0 |
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156 * @param aTime a TS time of first packet in group. |
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157 * @param aPoint a seek point in clip for group. |
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158 * @return None. |
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159 */ |
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160 void AppendSeekArrayL( const TUint aTime, |
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161 const TInt aPoint ); |
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162 |
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163 /** |
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164 * Saves seek array to the clip. |
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165 * @since Series 60 3.0 |
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166 * @return None. |
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167 */ |
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168 void SaveSeekArrayL(); |
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169 |
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170 /** |
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171 * Reads seek array from the clip. |
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172 * @since Series 60 3.0 |
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173 * @param aPoint a seek array point in clip. |
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174 * @return true if items in seek array, otherwise false. |
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175 */ |
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176 TBool ReadSeekArrayL( const TInt aPoint ); |
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177 |
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178 /** |
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179 * Resets seek array. |
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180 * @since Series 60 3.0 |
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181 * @return None. |
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182 */ |
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183 inline void ResetSeekArray(); |
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184 |
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185 /** |
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186 * Writes variables to log file. |
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187 * @since Series 60 3.0 |
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188 * @param aMethod a method which called this |
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189 */ |
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190 void LogVariables( const TDesC& aMethod ); |
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191 |
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192 private: // Functions from base classes |
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193 |
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194 /** |
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195 * From CActive : Called when request completion event occurs. |
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196 * @since Series 60 3.0 |
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197 * @return None. |
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198 */ |
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199 virtual void RunL() = 0; |
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200 |
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201 /** |
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202 * From CActive : Handles a leave occurring in the request |
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203 * completion event handler RunL(). |
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204 * @since Series 60 3.0 |
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205 * @param aError the leave code |
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206 * @return status of run error handling |
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207 */ |
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208 virtual TInt RunError( TInt aError ) = 0; |
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209 |
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210 /** |
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211 * From CActive : Called when request completion event cancelled. |
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212 * @since Series 60 3.0 |
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213 * @return None. |
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214 */ |
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215 virtual void DoCancel() = 0; |
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216 |
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217 protected: // Data types |
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218 |
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219 // Defines seek struct |
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220 class SSeek |
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221 { |
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222 |
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223 public: // Data |
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224 |
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225 /** |
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226 * Enlapsed time. |
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227 */ |
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228 TUint iTime; |
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229 |
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230 /** |
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231 * Point in clip. |
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232 */ |
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233 TInt iPoint; |
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234 |
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235 }; |
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236 |
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237 protected: // Data |
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238 |
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239 /** |
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240 * Rtp file usage mode. |
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241 */ |
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242 TRtpFileMode iMode; |
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243 |
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244 /** |
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245 * Current group. |
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246 */ |
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247 TInt iThisGroup; |
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248 |
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249 /** |
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250 * Packet group counter (Seek header). |
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251 */ |
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252 TInt iGroupsTotalCount; |
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253 |
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254 /** |
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255 * First seek address (Seek header). |
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256 */ |
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257 TInt iFirstSeekAddr; |
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258 |
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259 /** |
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260 * Last seek address (Seek header). |
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261 */ |
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262 TInt iLastSeekAddr; |
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263 |
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264 /** |
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265 * Group total length (Group header). |
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266 */ |
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267 TInt iGroupTotalLen; |
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268 |
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269 /** |
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270 * Next group point (Group header). |
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271 */ |
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272 TInt iNextGroupPoint; |
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273 |
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274 /** |
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275 * Previous group point (Group header). |
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276 */ |
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277 TInt iPrevGroupPoint; |
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278 |
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279 /** |
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280 * Group time (Group header). |
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281 */ |
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282 TUint iGroupTime; |
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283 |
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284 /** |
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285 * Seek header point. |
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286 */ |
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287 TInt iSeekHeaderPoint; |
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288 |
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289 /** |
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290 * Current clip path. |
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291 */ |
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292 HBufC* iCurrentPath; |
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293 |
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294 /** |
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295 * Seek array. |
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296 */ |
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297 CArrayFix<SSeek>* iSeekArray; |
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298 |
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299 /** |
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300 * File data buffer pointer. |
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301 */ |
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302 TPtr8 iDataPtr; |
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303 |
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304 /** |
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305 * File server. |
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306 */ |
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307 RFs iFs; |
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308 |
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309 /* |
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310 * File operations. |
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311 */ |
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312 RFile iFile; |
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313 |
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314 }; |
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315 |
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316 #include <ipvideo/CRtpFileBase.inl> |
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317 |
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318 #endif // CRTPFILEBASE_H |
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319 |
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320 // End of File |
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