1 /* |
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2 * Copyright (c) 2010 Ixonos Plc. |
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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 "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 * Ixonos Plc |
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14 * |
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15 * Description: |
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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 |
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21 |
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22 #ifndef __AUDPROCESSOR_H__ |
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23 #define __AUDPROCESSOR_H__ |
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24 |
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25 |
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26 #include <e32base.h> |
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27 #include <e32std.h> |
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28 |
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29 #include "AudCommon.h" |
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30 #include "AudClipInfo.h" |
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31 #include "ProcClipInfoAO.h" |
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32 #include "ProcProcessAO.h" |
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33 #include "ProcVisualizationAO.h" |
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34 #include "ProcTimeEstimateAO.h" |
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35 |
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36 /* |
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37 * Forward declarations. |
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38 */ |
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39 class CAudSong; |
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40 class CAudClip; |
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41 class MProcProcessObserver; |
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42 class MProcClipInfoObserver; |
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43 class CProcClipInfoAO; |
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44 class CProcProcess; |
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45 class CProcVisualizationAO; |
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46 class CProcTimeEstimateAO; |
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47 |
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48 /** |
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49 * Audio processor. |
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50 */ |
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51 class CAudProcessor : public CBase |
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52 { |
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53 public: |
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54 |
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55 /** |
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56 * Constructors for instantiating new audio processors. |
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57 * Should reserve as little resources as possible at this point. |
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58 */ |
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59 static CAudProcessor* NewL(); |
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60 static CAudProcessor* NewLC(); |
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61 |
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62 |
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63 virtual ~CAudProcessor(); |
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64 |
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65 /** |
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66 * Starts a syncronous song processing |
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67 */ |
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68 TBool StartSyncProcessingL(const CAudSong* aSong); |
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69 |
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70 TBool ProcessSyncPieceL(HBufC8*& aFrame, TInt& aProgress, |
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71 TTimeIntervalMicroSeconds& aDuration); |
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72 |
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73 /** |
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74 * Cancel song processing. |
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75 */ |
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76 void CancelProcessing(MProcProcessObserver& aObserver); |
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77 |
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78 |
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79 |
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80 /** |
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81 * Read the header from the specified audio clip file and return its properties. |
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82 * |
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83 * |
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84 * Possible leave codes: |
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85 * - <code>KErrNoMemory</code> if memory allocation fails |
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86 * - <code>KErrNotFound</code> if there is no file with the specified name |
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87 * in the specified directory (but the directory exists) |
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88 * - <code>KErrPathNotFound</code> if the specified directory |
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89 * does not exist |
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90 * - <code>KErrUnknown</code> if the specified file is of unknown format |
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91 * |
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92 * @param aFileName name of the file to read |
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93 * @param aFileHandle handle of the file to read |
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94 * @param aProperties Output parameter. Properties of the input file. |
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95 * Allocated and released by the caller |
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96 * @param aObserver Observer to be notified as soon as operation completes |
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97 */ |
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98 void GetAudFilePropertiesL(const TDesC& aFileName, RFile* aFileHandle, |
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99 TAudFileProperties* aProperties, |
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100 MProcClipInfoObserver& aObserver, TInt aPriority); |
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101 |
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102 /** |
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103 * Starts an asynchronous visualization operation for a clip. Progress |
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104 * indications are sent to an observer |
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105 * |
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106 * @param aClip Clip to be visualized |
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107 * @param aSize Lenght of the visualization array, must be positive |
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108 * @param aPriority Priority of the operation |
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109 */ |
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110 void StartGetClipVisualizationL(const CAudClipInfo* aClipInfo, TInt aSize, |
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111 MAudVisualizationObserver& aObserver, |
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112 TInt aPriority); |
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113 |
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114 /** |
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115 * Cancels a clip visualization operation. If an operation is not running |
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116 * a <code>TAudPanic::EVisualizationProcessNotRunning<code> is thrown |
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117 */ |
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118 void CancelClipVisualization(); |
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119 |
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120 TBool StartTimeEstimateL(const CAudSong* aSong, MAudTimeEstimateObserver& aTEObserver); |
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121 |
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122 void CancelTimeEstimate(); |
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123 |
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124 |
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125 |
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126 protected: |
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127 CAudProcessor(); |
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128 |
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129 void ConstructL(); |
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130 |
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131 private: |
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132 |
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133 // clip info active object owned by this |
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134 CProcClipInfoAO* iClipInfoAO; |
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135 |
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136 // processing object owned by this |
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137 CProcProcess* iProcessingObject; |
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138 |
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139 // visualization active object owned by this |
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140 CProcVisualizationAO* iVisualizationAO; |
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141 |
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142 // Time estimation active object owned by this |
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143 CProcTimeEstimateAO* iTimeEstimateAO; |
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144 |
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145 |
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146 |
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147 // a flag to indicate whether there is some ongoing processing |
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148 TBool iProcessing; |
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149 |
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150 friend class CProcProcess; |
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151 friend class CProcClipInfoAO; |
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152 |
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153 |
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154 }; |
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155 |
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156 |
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157 #endif // __AudProcessor_H__ |
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158 |
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