/// <summary>
/// Allows a programmer to query the MediaServer through the Browse action.
/// </summary>
/// <param name="ObjectID"></param>
/// <param name="BrowseFlag"></param>
/// <param name="Filter"></param>
/// <param name="StartingIndex"></param>
/// <param name="RequestedCount"></param>
/// <param name="SortCriteria"></param>
/// <param name="_Tag"></param>
/// <param name="callback">Returns output args and error info.</param>
public void RequestBrowse(System.String ObjectID, OpenSource.UPnP.AV.CpContentDirectory.Enum_A_ARG_TYPE_BrowseFlag BrowseFlag, System.String Filter, System.UInt32 StartingIndex, System.UInt32 RequestedCount, System.String SortCriteria, object _Tag, Delegate_OnBrowseDone2 callback)
{
_RequestState state = new _RequestState();
state.Callback_Browse2 = callback;
state.Tag = _Tag;
this.ContentDirectory.Browse(ObjectID, BrowseFlag, Filter, StartingIndex, RequestedCount, SortCriteria, state, new OpenSource.UPnP.AV.CpContentDirectory.Delegate_OnResult_Browse(OnBrowseDone));
}
/// <summary>
/// Processes the results of Browse requests.
/// </summary>
/// <param name="sender"></param>
/// <param name="ObjectID"></param>
/// <param name="BrowseFlag"></param>
/// <param name="Filter"></param>
/// <param name="StartingIndex"></param>
/// <param name="RequestedCount"></param>
/// <param name="SortCriteria"></param>
/// <param name="Result"></param>
/// <param name="NumberReturned"></param>
/// <param name="TotalMatches"></param>
/// <param name="UpdateID"></param>
/// <param name="e"></param>
/// <param name="_Tag"></param>
private void OnBrowseDone(CpContentDirectory sender, System.String ObjectID, OpenSource.UPnP.AV.CpContentDirectory.Enum_A_ARG_TYPE_BrowseFlag BrowseFlag, System.String Filter, System.UInt32 StartingIndex, System.UInt32 RequestedCount, System.String SortCriteria, System.String Result, System.UInt32 NumberReturned, System.UInt32 TotalMatches, System.UInt32 UpdateID, UPnPInvokeException e, object _Tag)
{
_RequestState state = (_RequestState)_Tag;
if (e != null)
{
if (state.Callback_Browse1 != null)
{
state.Callback_Browse1(this, ObjectID, BrowseFlag, Filter, StartingIndex, RequestedCount, SortCriteria, e, null, state.Tag, null, NumberReturned, TotalMatches, UpdateID);
}
else if (state.Callback_Browse2 != null)
{
state.Callback_Browse2(this, e, null, state.Tag, null, NumberReturned, TotalMatches, UpdateID);
}
}
else
{
ArrayList al = null;
try
{
al = CpMediaBuilder.BuildMediaBranches(Result);
}
catch (Exception parseError)
{
if (state.Callback_Browse1 != null)
{
state.Callback_Browse1(this, ObjectID, BrowseFlag, Filter, StartingIndex, RequestedCount, SortCriteria, e, parseError, state.Tag, null, NumberReturned, TotalMatches, UpdateID);
}
else if (state.Callback_Browse2 != null)
{
state.Callback_Browse2(this, e, parseError, state.Tag, null, NumberReturned, TotalMatches, UpdateID);
}
al = null;
}
if (al != null)
{
if (state.Callback_Browse1 != null)
{
state.Callback_Browse1(this, ObjectID, BrowseFlag, Filter, StartingIndex, RequestedCount, SortCriteria, e, null, state.Tag, (IUPnPMedia[])al.ToArray(typeof(IUPnPMedia)), NumberReturned, TotalMatches, UpdateID);
}
else if (state.Callback_Browse2 != null)
{
state.Callback_Browse2(this, e, null, state.Tag, (IUPnPMedia[])al.ToArray(typeof(IUPnPMedia)), NumberReturned, TotalMatches, UpdateID);
}
}
}
}
private void Sink_OnBrowse(CpMediaServer server, System.String ObjectID, OpenSource.UPnP.AV.CpContentDirectory.Enum_A_ARG_TYPE_BrowseFlag BrowseFlag, System.String Filter, System.UInt32 StartingIndex, System.UInt32 RequestedCount, System.String SortCriteria, UPnPInvokeException e, Exception parseError, object _Tag, IUPnPMedia[] Result, System.UInt32 NumberReturned, System.UInt32 TotalMatches, System.UInt32 UpdateID)
{
IMediaContainer[] tagC, ec;
bool ok = true;
bool nomore = false;
// ensure we're processing results for the current context
lock (this)
{
tagC = (IMediaContainer[])_Tag;
ec = this.CurrentContext.EntireContext;
for (int i = 0; i < ec.Length; i++)
{
if (ec[i] != tagC[i])
{
ok = false;
break;
}
}
}
if (ok)
{
// results are for current context, merge metadata results
// with existing child list
if ((e == null) && (parseError == null))
{
lock (this)
{
// add to our media object
this.m_Children.AddRange(Result);
this.CurrentContext.ContainerContext.AddObjects(Result, true);
if (
((this.m_Children.Count < TotalMatches) && (NumberReturned > 0)) ||
((TotalMatches == 0) && (NumberReturned > 0))
)
{
// more items to come
this.m_CurrentIndex = NumberReturned;
}
else
{
// no more items, prune children from m_Container
ArrayList remove = new ArrayList();
foreach (IUPnPMedia m1 in this.CurrentContext.ContainerContext.CompleteList)
{
bool found = false;
foreach (IUPnPMedia m2 in this.m_Children)
{
if (m1 == m2)
{
found = true;
break;
}
}
if (found == false)
{
remove.Add(m1);
}
}
this.CurrentContext.ContainerContext.RemoveObjects(remove);
nomore = true;
}
}
if (this.OnIncrementalUpdate != null)
{
this.OnIncrementalUpdate(this, Result);
}
if (nomore)
{
if (this.OnRefreshComplete != null)
{
IUPnPMedia[] list = (IUPnPMedia[])this.m_Children.ToArray(typeof(IUPnPMedia));
this.OnRefreshComplete(this, list);
}
}
}
else
{
// error occurred with the results...
// how should we report this?
}
}
}
