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1 // Copyright (c) 2002-2009 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 // include\mmf\common\mmfutilities.h |
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15 // |
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16 // |
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17 |
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18 #ifndef __MMF_COMMON_UTILITIES_H__ |
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19 #define __MMF_COMMON_UTILITIES_H__ |
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20 |
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21 #include <e32base.h> |
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22 #include <mmf/server/mmfdatabuffer.h> |
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23 #include <mmf/common/mmffourcc.h> |
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24 |
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25 |
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26 /** |
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27 @publishedAll |
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28 @released |
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29 |
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30 Identifies the particular stream of the given media type. |
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31 */ |
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32 class TMediaId |
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33 { |
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34 public: |
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35 |
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36 /** |
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37 Constructs the class with the supplied arguments. |
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38 |
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39 This constructor is used when there are multiple streams of the same media type on the same |
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40 MDataSource. |
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41 |
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42 @param aMediaType |
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43 The media type (video, audio etc.). |
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44 @param aStreamId |
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45 Identifies a specific stream when there are multiple streams of the same media type on |
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46 the same MDataSource. |
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47 */ |
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48 TMediaId(TUid aMediaType, TUint aStreamId); |
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49 |
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50 /** |
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51 Constructs the class with the supplied argument. |
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52 |
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53 This constructor is used when there is a single stream of the same media type on the same |
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54 MDataSource. |
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55 |
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56 @param aMediaType |
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57 The media type (video, audio etc.). |
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58 */ |
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59 TMediaId(TUid aMediaType); |
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60 |
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61 /** |
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62 Default constructor. |
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63 */ |
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64 TMediaId(); |
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65 public: |
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66 /** |
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67 The media type (KUidMediaTypeAudio, KUidMediaTypeVideo, etc). |
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68 */ |
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69 TUid iMediaType; |
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70 |
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71 /** |
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72 Identifies a particular media stream used in case where multiple streams |
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73 of the same media type are present on the same MDataSource. |
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74 */ |
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75 TUint iStreamId; |
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76 private: |
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77 /** |
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78 This member is internal and not intended for use. |
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79 */ |
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80 TInt iReserved1; |
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81 TInt iReserved2; |
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82 TInt iReserved3; |
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83 }; |
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84 |
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85 /** |
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86 @publishedAll |
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87 @released |
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88 |
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89 The FourCC code that represents NULL. |
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90 */ |
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91 const TInt KFourCCNULL = KMMFFourCCCodeNULL; |
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92 |
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93 /** |
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94 @publishedAll |
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95 @released |
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96 |
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97 A class that holds a four character code, representing supported data encodings for the |
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98 conversion destination. The four character codes are packed into a single TUint32. |
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99 |
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100 FourCC codes are a representation of the datatypes used to identify codecs. FourCC codes are used in |
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101 codec .rss files as a match string used by ECOM to correctly load the required DLL. |
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102 */ |
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103 class TFourCC |
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104 { |
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105 public: |
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106 |
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107 /** |
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108 Default constructor initialises the class to KMMFFourCCCodeNULL. |
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109 */ |
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110 TFourCC() {iFourCC = KMMFFourCCCodeNULL;} //'NULL' |
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111 |
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112 /** |
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113 Packs the four arguments into a single TUint32. |
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114 |
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115 The four arguments are packed in little-endian format. |
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116 |
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117 @param aChar1 |
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118 A character that represents part of the FourCC code. This character will be the least |
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119 significant byte of the code. |
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120 @param aChar2 |
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121 A character that represents part of the FourCC code. |
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122 @param aChar3 |
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123 A character that represents part of the FourCC code. |
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124 @param aChar4 |
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125 A character that represents part of the FourCC code. This character will be the most |
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126 significant byte of the code. |
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127 */ |
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128 TFourCC(TUint8 aChar1, TUint8 aChar2, TUint8 aChar3, TUint8 aChar4) {iFourCC =(aChar4<<24)+(aChar3<<16)+(aChar2<<8)+aChar1;} |
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129 |
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130 /** |
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131 Constructs a FourCC code with the given 8 bit desciptor where the descriptor contains the |
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132 characters that make up the FourCC code. |
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133 |
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134 @param aDes |
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135 The descriptor containing the characters from which to make the FourCC code. |
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136 */ |
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137 TFourCC(const TDesC8& aDes) {iFourCC =(aDes[3]<<24)+(aDes[2]<<16)+(aDes[1]<<8)+aDes[0];} |
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138 |
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139 /** |
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140 Constructor with a TInt32 in little-endian format. |
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141 |
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142 @param aFourCC |
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143 The FourCC code. |
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144 */ |
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145 TFourCC(TInt32 aFourCC) {iFourCC = aFourCC;} |
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146 |
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147 /** |
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148 Returns the FourCC code in little-endian format. |
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149 |
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150 @return The FourCC code in little-endian format. |
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151 */ |
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152 TUint32 FourCC() {return iFourCC;} |
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153 inline void FourCC( TPtr8* aDes ) const ; |
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154 |
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155 /** |
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156 Sets the FourCC code equal to the value in the supplied argument. |
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157 |
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158 @param aFourCC |
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159 The required TFourCC containting the FourCC code. |
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160 */ |
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161 void Set(TFourCC aFourCC) {iFourCC = aFourCC.iFourCC;} |
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162 |
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163 /** |
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164 Sets the FourCC code equal to the supplied argument. |
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165 |
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166 @param aFourCC |
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167 The required FourCC code. |
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168 */ |
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169 void Set(TUint32 aFourCC) {iFourCC = aFourCC;} |
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170 |
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171 /** |
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172 Equality operator. |
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173 |
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174 @param aA |
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175 The TFourCC code that *this will be tested against. |
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176 |
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177 @return A boolean indicating if the two values are equal. ETrue if the two values are equal, |
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178 otherwise false. |
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179 */ |
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180 TBool operator==(const TFourCC& aA) const {return (iFourCC == aA.iFourCC);} |
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181 |
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182 /** |
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183 Equality operator. |
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184 |
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185 @param aUint |
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186 The FourCC code that *this will be tested against. |
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187 |
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188 @return A boolean indicating if the two values are equal. ETrue if the two values are equal, |
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189 otherwise false. |
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190 */ |
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191 TBool operator==(const TUint32& aUint) const {return (iFourCC == aUint);} |
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192 |
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193 /** |
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194 Inequality operator. |
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195 |
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196 @param aA |
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197 The TFourCC code that *this will be tested against. |
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198 |
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199 @return A boolean indicating if the two values are not equal. ETrue if the two values are |
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200 unequal, otherwise false. |
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201 */ |
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202 TBool operator!=(const TFourCC& aA) const {return (iFourCC != aA.iFourCC);} |
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203 |
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204 /** |
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205 Inequality operator. |
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206 |
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207 @param aUint |
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208 The FourCC code that *this will be tested against. |
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209 */ |
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210 TBool operator!=(const TUint32& aUint) const {return (iFourCC != aUint);} |
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211 |
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212 private: |
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213 TUint32 iFourCC; |
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214 }; |
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215 |
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216 |
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217 #ifndef SYMBIAN_ENABLE_SPLIT_HEADERS |
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218 #include <mmf/common/mmfhelper.h> |
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219 #endif |
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220 |
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221 |
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222 #include <mmf/common/mmfutilities.inl> |
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223 |
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224 #endif |
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225 |