private bool ProcessImageQueue(int packetsToSend)
{
int packetsSent = 0;
while (packetsSent < packetsToSend)
{
J2KImage image = GetHighestPriorityImage();
// If null was returned, the texture priority queue is currently empty
if (image == null)
{
return(false);
}
int sent;
bool imageDone = image.SendPackets(packetsToSend - packetsSent, out sent);
packetsSent += sent;
// If the send is complete, destroy any knowledge of this transfer
if (imageDone)
{
RemoveImageFromQueue(image);
}
}
return(m_priorityQueue.Count > 0);
}
private void RemoveImageFromQueue(J2KImage image)
{
lock (m_priorityQueue)
{
if (m_priorityQueue.Find(image.PriorityQueueHandle, out image))
{
try { m_priorityQueue.Delete(image.PriorityQueueHandle); }
catch (Exception) { }
m_queuedTextures.Remove(image.TextureID);
}
}
}
private J2KImage GetHighestPriorityImage()
{
J2KImage image = null;
lock (m_priorityQueue)
{
if (!m_priorityQueue.IsEmpty)
{
try { image = m_priorityQueue.FindMax(); }
catch (Exception) { }
}
}
return(image);
}
private void UpdateImageInQueue(J2KImage image)
{
lock (m_priorityQueue)
{
J2KImage existingImage;
if (m_priorityQueue.Find(image.PriorityQueueHandle, out existingImage))
{
try
{
m_priorityQueue.Replace(image.PriorityQueueHandle, image);
return;
}
catch { }
}
image.PriorityQueueHandle = null;
m_priorityQueue.Add(ref image.PriorityQueueHandle, image);
m_queuedTextures[image.TextureID] = image;
}
}
private void EnqueueRequest(LLAgent agent, UUID textureID, sbyte discardLevel, float priority, uint packetNumber, uint sequenceNumber)
{
J2KImage image;
// Look up this texture download
lock (m_priorityQueue)
m_queuedTextures.TryGetValue(textureID, out image);
if (image != null)
{
// Update for an existing texture request
if (discardLevel == -1 && priority == 0f)
{
//m_log.Debug("[TEX]: (CAN) ID=" + textureID);
try
{
lock (m_priorityQueue)
{
m_priorityQueue.Delete(image.PriorityQueueHandle);
m_queuedTextures.Remove(textureID);
}
}
catch (Exception) { }
}
else
{
//m_log.DebugFormat("[TEX]: (UPD) ID={0}: D={1}, S={2}, P={3}", textureID, discardLevel, packetNumber, priority);
// Check the packet sequence to make sure this update isn't older than
// one we've already received
if (sequenceNumber > image.LastSequence)
{
// Update the sequence number of the last RequestImage packet
image.LastSequence = sequenceNumber;
//Update the requested discard level
image.DiscardLevel = discardLevel;
//Update the requested packet number
image.StartPacket = Math.Max(1, packetNumber);
//Update the requested priority
image.Priority = priority;
// Update the start/end offsets for this request
image.UpdateOffsets();
UpdateImageInQueue(image);
}
}
}
else
{
// New texture request
if (discardLevel == -1 && priority == 0f)
{
//m_log.DebugFormat("[TEX]: (IGN) ID={0}", textureID);
}
else
{
//m_log.DebugFormat("[TEX]: (NEW) ID={0}: D={1}, S={2}, P={3}", textureID, discardLevel, packetNumber, priority);
Asset asset;
if (m_assetClient.TryGetAsset(textureID, "image/x-j2c", out asset))
{
image = new J2KImage(m_udp, asset, agent, discardLevel, Math.Max(1, packetNumber), priority);
// Update the start/end offsets for this request
image.UpdateOffsets();
// Add this download to the priority queue
UpdateImageInQueue(image);
}
else
{
ImageNotInDatabasePacket missing = new ImageNotInDatabasePacket();
missing.ImageID.ID = textureID;
m_udp.SendPacket(agent, missing, ThrottleCategory.Asset, true);
}
}
}
}