/// <summary>
/// This is where we decide what we need to update
/// and assign the real discardLevel and packetNumber
/// assuming of course that the connected client might be bonkers
/// </summary>
public void RunUpdate()
{
if (!HasAsset)
{
if (!m_assetRequested || DateTime.UtcNow.Ticks > AssetRequestTime + ASSET_REQUEST_TIMEOUT)
{
// m_log.DebugFormat(
// "[J2KIMAGE]: Requesting asset {0} from request in packet {1}, already requested? {2}, due to timeout? {3}",
// TextureID, LastSequence, m_assetRequested, DateTime.UtcNow.Ticks > AssetRequestTime + ASSET_REQUEST_TIMEOUT);
m_assetRequested = true;
AssetRequestTime = DateTime.UtcNow.Ticks;
AssetService.Get(TextureID.ToString(), this, AssetReceived);
}
}
else
{
if (!IsDecoded)
{
//We need to decode the requested image first
if (!m_decodeRequested)
{
//Request decode
m_decodeRequested = true;
// m_log.DebugFormat("[J2KIMAGE]: Requesting decode of asset {0}", TextureID);
// Do we have a jpeg decoder?
if (J2KDecoder != null)
{
if (m_asset == null)
{
J2KDecodedCallback(TextureID, new OpenJPEG.J2KLayerInfo[0]);
}
else
{
// Send it off to the jpeg decoder
J2KDecoder.BeginDecode(TextureID, m_asset, J2KDecodedCallback);
}
}
else
{
J2KDecodedCallback(TextureID, new OpenJPEG.J2KLayerInfo[0]);
}
}
}
else
{
// Check for missing image asset data
if (m_asset == null)
{
//m_log.Warn("[J2KIMAGE]: RunUpdate() called with missing asset data (no missing image texture?). Canceling texture transfer");
m_currentPacket = m_stopPacket;
return;
}
if (DiscardLevel >= 0 || m_stopPacket == 0)
{
// This shouldn't happen, but if it does, we really can't proceed
if (m_layers == null)
{
m_log.Warn("[J2KIMAGE]: RunUpdate() called with missing Layers. Canceling texture transfer");
m_currentPacket = m_stopPacket;
return;
}
int maxDiscardLevel = Math.Max(0, m_layers.Length - 1);
// Treat initial texture downloads with a DiscardLevel of -1 a request for the highest DiscardLevel
if (DiscardLevel < 0 && m_stopPacket == 0)
{
DiscardLevel = (sbyte)maxDiscardLevel;
}
// Clamp at the highest discard level
DiscardLevel = (sbyte)Math.Min(DiscardLevel, maxDiscardLevel);
//Calculate the m_stopPacket
if (m_layers.Length > 0)
{
m_stopPacket = (uint)GetPacketForBytePosition(m_layers[(m_layers.Length - 1) - DiscardLevel].End);
//I don't know why, but the viewer seems to expect the final packet if the file
//is just one packet bigger.
if (TexturePacketCount() == m_stopPacket + 1)
{
m_stopPacket = TexturePacketCount();
}
}
else
{
m_stopPacket = TexturePacketCount();
}
//Give them at least two packets, to play nice with some broken viewers (SL also behaves this way)
if (m_stopPacket == 1 && m_layers[0].End > FIRST_PACKET_SIZE)
{
m_stopPacket++;
}
m_currentPacket = StartPacket;
}
}
}
}
public void RunUpdate()
{
//This is where we decide what we need to update
//and assign the real discardLevel and packetNumber
//assuming of course that the connected client might be bonkers
if (!HasAsset)
{
if (!m_assetRequested)
{
m_assetRequested = true;
AssetService.Get(TextureID.ToString(), this, AssetReceived);
}
}
else
{
if (!IsDecoded)
{
//We need to decode the requested image first
if (!m_decodeRequested)
{
//Request decode
m_decodeRequested = true;
// Do we have a jpeg decoder?
if (J2KDecoder != null)
{
if (m_asset == null)
{
J2KDecodedCallback(TextureID, new OpenJPEG.J2KLayerInfo[0]);
}
else
{
// Send it off to the jpeg decoder
J2KDecoder.BeginDecode(TextureID, m_asset, J2KDecodedCallback);
}
}
else
{
J2KDecodedCallback(TextureID, new OpenJPEG.J2KLayerInfo[0]);
}
}
}
else
{
// Check for missing image asset data
if (m_asset == null)
{
MainConsole.Instance.Debug(
"[J2KIMAGE]: RunUpdate() called with missing asset data (no missing image texture?). Canceling texture transfer");
m_currentPacket = m_stopPacket;
return;
}
if (DiscardLevel >= 0 || m_stopPacket == 0)
{
// This shouldn't happen, but if it does, we really can't proceed
if (Layers == null)
{
MainConsole.Instance.Warn(
"[J2KIMAGE]: RunUpdate() called with missing Layers. Canceling texture transfer");
m_currentPacket = m_stopPacket;
return;
}
int maxDiscardLevel = Math.Max(0, Layers.Length - 1);
// Treat initial texture downloads with a DiscardLevel of -1 a request for the highest DiscardLevel
if (DiscardLevel < 0 && m_stopPacket == 0)
{
DiscardLevel = (sbyte)maxDiscardLevel;
}
// Clamp at the highest discard level
DiscardLevel = (sbyte)Math.Min(DiscardLevel, maxDiscardLevel);
//Calculate the m_stopPacket
if (Layers.Length > 0)
{
m_stopPacket =
(uint)GetPacketForBytePosition(Layers[(Layers.Length - 1) - DiscardLevel].End);
//I don't know why, but the viewer seems to expect the final packet if the file
//is just one packet bigger.
if (TexturePacketCount() == m_stopPacket + 1)
{
m_stopPacket = TexturePacketCount();
}
}
else
{
m_stopPacket = TexturePacketCount();
}
m_currentPacket = StartPacket;
}
}
}
}
