|
1 /* |
|
2 * Copyright (c) 2006 Nokia Corporation and/or its subsidiary(-ies). |
|
3 * All rights reserved. |
|
4 * This component and the accompanying materials are made available |
|
5 * under the terms of "Eclipse Public License v1.0" |
|
6 * which accompanies this distribution, and is available |
|
7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
|
8 * |
|
9 * Initial Contributors: |
|
10 * Nokia Corporation - initial contribution. |
|
11 * |
|
12 * Contributors: |
|
13 * |
|
14 * Description: Playback engine's media helper |
|
15 * |
|
16 */ |
|
17 |
|
18 |
|
19 |
|
20 #ifndef CMPXPLAYBACKMEDIAHELPER_H |
|
21 #define CMPXPLAYBACKMEDIAHELPER_H |
|
22 |
|
23 #include <e32base.h> |
|
24 #include <mpxcollectionpath.h> |
|
25 #include <mpxtaskqueueobserver.h> |
|
26 #include <mpxcollectionobserver.h> |
|
27 |
|
28 // FORWARD DECLARATIONS |
|
29 class CMPXPlaybackEngine; |
|
30 class CMPXActiveTaskQueue; |
|
31 class MMPXPlaybackEngineObserver; |
|
32 class MMPXCollectionUtility; |
|
33 class CMPXClientList; |
|
34 |
|
35 /** |
|
36 * Helper class to retrieve media for clients |
|
37 */ |
|
38 NONSHARABLE_CLASS( CMPXPlaybackMediaHelper ) : public CBase, |
|
39 public MMPXTaskQueueObserver, |
|
40 public MMPXCollectionObserver |
|
41 { |
|
42 public: |
|
43 |
|
44 /** |
|
45 * Two-phased constructor |
|
46 */ |
|
47 static CMPXPlaybackMediaHelper* NewL( CMPXPlaybackEngine& aEngine ); |
|
48 |
|
49 /** |
|
50 * Destructor. |
|
51 */ |
|
52 virtual ~CMPXPlaybackMediaHelper(); |
|
53 |
|
54 private: // constructors |
|
55 |
|
56 /** |
|
57 * Constructor. |
|
58 */ |
|
59 CMPXPlaybackMediaHelper( CMPXPlaybackEngine& aEngine ); |
|
60 |
|
61 /** |
|
62 * Symbian OS constructor. |
|
63 */ |
|
64 void ConstructL(); |
|
65 |
|
66 public: // New Methods |
|
67 |
|
68 /** |
|
69 * Retrieves the media given the current path, and upon return, |
|
70 * either calls back the observer, or broadcasts the message to |
|
71 * the given client list |
|
72 * |
|
73 * @param aPath Collection path to retrieve media. |
|
74 * @param aCmd CMPXCommand containing the attributes and attribute spec |
|
75 * Ownership of aAttrs is passed to this method |
|
76 * @param aObserver Callback to return media to |
|
77 * @param aBroadcast Whether or not to broadcast media message |
|
78 * @param aClientlist Clientlist to broadcast message to |
|
79 */ |
|
80 void MediaL( const CMPXCollectionPath& aPath, |
|
81 CMPXCommand* aCmd, |
|
82 MMPXPlaybackEngineObserver* aObserver, |
|
83 TBool aBroadcast = EFalse, |
|
84 CMPXClientList* aClientList = NULL ); |
|
85 |
|
86 /** |
|
87 * Cancels all outstanding requests |
|
88 */ |
|
89 void CancelRequests(); |
|
90 |
|
91 private: // From base classes |
|
92 |
|
93 /** |
|
94 * From MMPXTaskQueueObserver |
|
95 */ |
|
96 void ExecuteTask( TInt aTask, |
|
97 TInt aParamData, |
|
98 TAny* aPtrData, |
|
99 const CBufBase& aBuf, |
|
100 TAny* aCallback, |
|
101 CBase* aCObject1, |
|
102 CBase* aCObject2); |
|
103 |
|
104 /** |
|
105 * @see MMPXTaskQueueObserver |
|
106 */ |
|
107 void HandleTaskError(TInt aTask, |
|
108 TAny* aPtrData, |
|
109 TAny* aCallback, |
|
110 TInt aError); |
|
111 |
|
112 /** |
|
113 * From MMPXCollectionObserver |
|
114 */ |
|
115 void HandleCollectionMessage(CMPXMessage* aMsg, TInt aErr); |
|
116 |
|
117 /** |
|
118 * From MMPXCollectionObserver |
|
119 */ |
|
120 void HandleOpenL( const CMPXMedia& aEntries, |
|
121 TInt aIndex, |
|
122 TBool aComplete, |
|
123 TInt aError ); |
|
124 |
|
125 /** |
|
126 * From MMPXCollectionObserver |
|
127 */ |
|
128 void HandleOpenL( const CMPXCollectionPlaylist& aPlaylist, |
|
129 TInt aError ); |
|
130 |
|
131 /** |
|
132 * From MMPXCollectionObserver |
|
133 */ |
|
134 void HandleCommandComplete( CMPXCommand* aCommandResult, |
|
135 TInt aError ); |
|
136 |
|
137 /** |
|
138 * From MMPXCollectionMediaObserver |
|
139 */ |
|
140 void HandleCollectionMediaL( const CMPXMedia& aMedia, |
|
141 TInt aError); |
|
142 |
|
143 private: // New functions |
|
144 |
|
145 /** |
|
146 * Executes task, leaving method |
|
147 */ |
|
148 void DoExecuteTaskL( |
|
149 TInt aTask, |
|
150 TInt aParamData, |
|
151 TAny* aPtrData, |
|
152 const CBufBase& aBuf, |
|
153 TAny* aCallback, |
|
154 CBase* aCObject1, |
|
155 CBase* aCObject2); |
|
156 |
|
157 private: // data |
|
158 CMPXPlaybackEngine& iEngine; |
|
159 MMPXCollectionUtility* iCollectionUtility; |
|
160 CMPXActiveTaskQueue* iTaskQueue; |
|
161 }; |
|
162 |
|
163 #endif // CMPXPLAYBACKMEDIAHELPER_H |
|
164 |
|
165 //End of file |