1 // Copyright (c) 2008-2009 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 // |
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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 @file |
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20 @publishedAll |
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21 @released |
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22 */ |
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23 |
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24 #ifndef REMCONDATABASEAWARENOWPLAYINGBROWSEOBSERVER_H |
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25 #define REMCONDATABASEAWARENOWPLAYINGBROWSEOBSERVER_H |
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26 |
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27 NONSHARABLE_CLASS(MRemConDatabaseAwareNowPlayingBrowseObserver) |
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28 { |
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29 public: |
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30 /** |
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31 Requests a listing of the items present in the Now Playing folder. If the |
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32 media player does not natively support a Now Plyaing folder the client |
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33 shall return a listing of one item which is the currently playing media |
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34 element. |
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35 |
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36 No metadata is requested, that can be retrieved separately on a per item |
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37 basis. Trying this out for now as it fits in with the existing metadata |
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38 attribute collection, and means that we would also separate out the |
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39 listing from the metadata. This means that we can retrieve a NowPlaying |
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40 list and then request the metadata from the observer. |
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41 |
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42 The result shall be returned via a call to |
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43 MRemConDatabaseAwareNowPlayingBrowse::MrcdanpbFolderListing() |
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44 |
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45 @param aStartItem The offset into the folder listing of the first item to |
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46 retrieve. If there is no media available at this offset the error |
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47 KErrMediaBrowseInvalidOffset shall be returned via the result call |
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48 to MrcdanpbFolderListing(). |
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49 |
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50 @param aEndItem The offset into the folder listing of the final item to |
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51 retrieve. If this is beyond the end of the folder listing then the |
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52 items from the aStartItem offset to the end of the listing shall |
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53 be returned via the result call to MrcdanpbFolderListing(). |
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54 */ |
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55 virtual void MrcdanpboGetFolderListing(TUint aStartItem, |
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56 TUint aEndItem) = 0; |
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57 |
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58 /** |
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59 Requests a set of metadata corresponding to a specific media element item. |
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60 |
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61 The client must return the metadata for the requested item via using |
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62 MRemConDatabaseAwareNowPlayingBrowse::MrcdanpbMediaElementItemResult() if |
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63 it returns KErrNone, if it is unable to to process this call then it can |
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64 return error but not call the response function |
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65 MRemConDatabaseAwareNowPlayingBrowse::MrcdanpbMediaElementItemResult(). |
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66 |
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67 @param aItemId The UID for the requested media element item. |
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68 |
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69 @param aIter An iterator for TMediaAttributeIds containing a list of |
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70 TMediaAttributeIds requested by the controller. |
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71 |
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72 @param aMediaLibraryStateCookie The cookie which the remote device |
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73 believes refers to the current state of the media library. If this |
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74 does not match the current state according to the client then the |
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75 client should call MrcdanpbMediaElementItemResult() with the error |
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76 KErrInvalidMediaLibraryStateCookie. |
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77 |
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78 @return The call back result. |
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79 - KErrNone If success. |
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80 - The appropriate error code. |
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81 */ |
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82 virtual TInt MrcdanpboGetItem(const TRemConItemUid& aItemId, |
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83 TMediaAttributeIter& aIter, |
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84 TUint16 aMediaLibraryStateCookie) = 0; |
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85 }; |
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86 |
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87 #endif //REMCONDATABASEAWARENOWPLAYINGBROWSEOBSERVER_H |
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