protected IEnumerator Refresh(int count)
{
status = SegmentStatus.Update;
for (int i = 0; i < count; i++)
{
if (i >= list.Count)
{
break;
}
if (i >= items.Count)
{
items.Add(prefab.Create());
yield return(new WaitForEndOfFrame());
}
if (items[i] != null)
{
callback?.Invoke(items[i], list[i]);
}
SetActive(items[i], true);
}
for (int i = count; i < items.Count; i++)
{
SetActive(items[i], false);
}
status = list.Count > count ? SegmentStatus.None : SegmentStatus.Complete;
yield return(null);
}
} // Setup
private void InitSectionData(SegmentStatus status)
{
// initialize segment data storage
status.SegmentId = Header.SegmentId;
status.SegmentData = new SegmentAssembler(new DvbStpSegmentIdentity(Header), Header.LastSectionNumber);
status.SegmentVersion = Header.SegmentVersion;
// notify start of download
FireSegmentDownloadStarted(status);
} // InitSectionData
} // FireSegmentDownloadStarted
protected virtual void FireSegmentSectionReceived(SegmentStatus status)
{
if (SegmentSectionReceived == null)
{
return;
}
var e = GetSegmentSectionReceivedEventArgs(status);
OnSegmentSectionReceived(this, e);
} // FireSegmentSectionReceived
} // OnSegmentDownloadCompleted
#endregion
#region Auxiliary methods
protected SegmentSectionReceivedEventArgs GetSegmentSectionReceivedEventArgs(SegmentStatus status)
{
var e = new SegmentSectionReceivedEventArgs()
{
PayloadId = Header.PayloadId,
SegmentId = Header.SegmentId,
SegmentVersion = Header.SegmentVersion,
SectionCount = status.SegmentData.LastSectionNumber + 1,
SectionsReceived = status.SegmentData.ReceivedSections,
SectionNumber = Header.SectionNumber,
SegmentListIndex = status.InfoIndex
};
return(e);
} // GetSegmentSectionReceivedEventArgs
} // FireSegmentDownloadRestarted
protected virtual void FireSegmentDownloadCompleted(SegmentStatus status)
{
if (SegmentDownloadCompleted == null)
{
return;
}
var e = new SegmentDownloadCompletedEventArgs(status.SegmentData)
{
PayloadId = Header.PayloadId,
SegmentId = Header.SegmentId,
SegmentVersion = Header.SegmentVersion,
SectionCount = status.SegmentData.LastSectionNumber + 1,
SegmentListIndex = status.InfoIndex,
SegmentsReceived = this.SegmentsReceived,
SegmentsPending = this.SegmentsPending,
};
OnSegmentDownloadCompleted(this, e);
} // SegmentDownloadCompleted
} // FireSegmentSectionReceived
protected virtual void FireSegmentDownloadRestarted(SegmentStatus status, byte oldVersion)
{
if (SegmentDownloadRestarted == null)
{
return;
}
var e = new SegmentDownloadRestartedEventArgs()
{
PayloadId = status.PayloadId,
SegmentListIndex = status.InfoIndex,
OldVersion = oldVersion,
NewVersion = status.SegmentVersion,
SectionCount = status.SegmentData.LastSectionNumber + 1,
RestartCount = status.DowloadRestartCount,
GlobalRestartCount = this.DowloadRestartCount,
};
OnSegmentDownloadRestarted(this, e);
} // FireSegmentDownloadRestarted
} // RestartSectionData
private void StoreSectionData(SegmentStatus status)
{
// reset timeout
ResetNoDataTimeout();
// version change?
if (Header.SegmentVersion != status.SegmentVersion)
{
RestartSectionData(status);
} // if
status.SegmentData.AddSectionData(Header.SectionNumber, DatagramData, Header.PayloadOffset, Header.PayloadSize);
if (status.SegmentData.IsSegmentComplete)
{
_segmentsReceived++;
_segmentsPending--;
FireSegmentDownloadCompleted(status);
} // if
EndReceptionLoop = (_segmentsPending == 0);
} // StoreSectionData
} // ProcessReceivedData
private void Setup(IList <DvbStpClientSegmentInfo> payloads)
{
_payloads = payloads;
_segmentsReceived = 0;
_segmentsPending = payloads.Count;
_status = new SegmentStatus[256];
for (var index = 0; index < payloads.Count; index++)
{
var info = payloads[index];
var status = new SegmentStatus()
{
PayloadId = info.PayloadId,
SegmentId = -1,
SegmentVersion = 0xFF,
InfoIndex = index,
ExpectedSegmentId = info.SegmentId.HasValue ? BitConverter.GetBytes(IPAddress.HostToNetworkOrder(info.SegmentId.Value)) : null
};
_status[info.PayloadId] = status;
} // for
} // Setup
} // InitSectionData
private void RestartSectionData(SegmentStatus status)
{
// increment restart count
DownloadRestartCount++;
status.DownloadRestartCount++;
// avoid infinite restart loops
if (DownloadRestartCount > MaxDownloadRestartCount)
{
throw new TimeoutException();
} // if
// start over
var oldVersion = status.SegmentVersion;
status.SegmentData = new SegmentAssembler(new DvbStpSegmentIdentity(Header), Header.LastSectionNumber);
status.SegmentVersion = Header.SegmentVersion;
ResetNoDataTimeout();
// notify of download restart
FireSegmentDownloadRestarted(status, oldVersion);
} // RestartSectionData
