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afd5f76648
This change moves texture send processing out of the main
packet processing loop and moves it to a timer based
processing cycle.
Texture packets are sent to the client consistently over
time. The timer is discontinued whenever there are no
textures to transmit.
The behavior of the texture sending mechanism is controlled
by three variables in the LLCLient section of the config
file:
[1] TextureRequestRate (mS) determines how many times per second
texture send processing will occur. The default is 100mS.
[2] TextureSendLimit determines how many different textures
will be considered on each cycle. Textures are selected
by priority. The old mechanism specified a value of 10 for
this parameter and this is the default
[3] TextureDataLimit determines how many packets will be sent for
each of the selected textures. The old mechanism specified a
value of 5, so this is the default.
So the net effect is that TextureSendLimit*TextureDataLimit
packets will be sent every TextureRequestRate mS.
Once we have gotten a reasonable feeling for how these parameters
affect overall processing, it would be nice to autonmically manage
these values using information about the current status of the
region and network.
Note that this also resolves the pathologcal problem that
previously existed which was that a seated avatar generated very
few in-bound packets (theoretically) and would therefore be the
least able to retrieve the images being displayed by a
projector script.
403 lines
14 KiB
C#
403 lines
14 KiB
C#
/*
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* Copyright (c) Contributors, http://opensimulator.org/
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* See CONTRIBUTORS.TXT for a full list of copyright holders.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of the OpenSimulator Project nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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using System;
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using System.Collections.Generic;
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using OpenMetaverse;
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using OpenMetaverse.Imaging;
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using OpenSim.Framework;
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using OpenSim.Region.Framework.Interfaces;
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using OpenSim.Services.Interfaces;
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using log4net;
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using System.Reflection;
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namespace OpenSim.Region.ClientStack.LindenUDP
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{
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/// <summary>
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/// We use this class to store image data and associated request data and attributes
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/// </summary>
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public class J2KImage
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{
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private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
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public double m_designatedPriorityKey;
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public double m_requestedPriority = 0.0d;
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public uint m_lastSequence = 0;
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public uint m_requestedPacketNumber;
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public sbyte m_requestedDiscardLevel;
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public UUID m_requestedUUID;
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public IJ2KDecoder m_j2kDecodeModule;
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public IAssetService m_assetCache;
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public OpenJPEG.J2KLayerInfo[] Layers = new OpenJPEG.J2KLayerInfo[0];
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public AssetBase m_MissingSubstitute = null;
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public bool m_decoded = false;
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public bool m_completedSendAtCurrentDiscardLevel;
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private sbyte m_discardLevel=-1;
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private uint m_packetNumber;
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private bool m_decoderequested = false;
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private bool m_hasasset = false;
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private bool m_asset_requested = false;
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private bool m_sentinfo = false;
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private uint m_stopPacket = 0;
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private const int cImagePacketSize = 1000;
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private const int cFirstPacketSize = 600;
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private AssetBase m_asset = null;
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private LLImageManager m_image;
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public J2KImage(LLImageManager image)
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{
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m_image = image;
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}
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public uint m_pPacketNumber
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{
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get { return m_packetNumber; }
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}
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public uint m_pStopPacketNumber
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{
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get { return m_stopPacket; }
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}
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public byte[] Data
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{
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get
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{
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if (m_asset != null)
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return m_asset.Data;
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else
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return null;
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}
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}
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public ushort TexturePacketCount()
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{
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if (!m_decoded)
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return 0;
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try
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{
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return (ushort)(((m_asset.Data.Length - cFirstPacketSize + cImagePacketSize - 1) / cImagePacketSize) + 1);
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}
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catch (Exception)
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{
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// If the asset is missing/destroyed/truncated, we will land
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// here
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//
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return 0;
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}
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}
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public void J2KDecodedCallback(UUID AssetId, OpenJPEG.J2KLayerInfo[] layers)
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{
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m_image.m_outstandingtextures++;
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Layers = layers;
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m_decoded = true;
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RunUpdate();
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}
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public void AssetDataCallback(UUID AssetID, AssetBase asset)
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{
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m_hasasset = true;
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if (asset == null || asset.Data == null)
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{
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m_asset = m_MissingSubstitute;
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}
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else
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{
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m_asset = asset;
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}
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RunUpdate();
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}
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protected void AssetReceived(string id, Object sender, AssetBase asset)
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{
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UUID assetID = UUID.Zero;
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if (asset != null)
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assetID = asset.FullID;
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AssetDataCallback(assetID, asset);
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}
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private int GetPacketForBytePosition(int bytePosition)
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{
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return ((bytePosition - cFirstPacketSize + cImagePacketSize - 1) / cImagePacketSize) + 1;
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}
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public int LastPacketSize()
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{
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if (m_packetNumber == 1)
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return m_asset.Data.Length;
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int lastsize = (m_asset.Data.Length - cFirstPacketSize) % cImagePacketSize;
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//If the last packet size is zero, it's really cImagePacketSize, it sits on the boundary
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if (lastsize == 0)
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{
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lastsize = cImagePacketSize;
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}
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return lastsize;
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}
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public int CurrentBytePosition()
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{
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if (m_packetNumber == 0)
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return 0;
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if (m_packetNumber == 1)
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return cFirstPacketSize;
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int result = cFirstPacketSize + ((int)m_packetNumber - 2) * cImagePacketSize;
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if (result < 0)
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{
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result = cFirstPacketSize;
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}
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return result;
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}
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public bool SendFirstPacket(LLClientView client)
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{
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// this means we don't have
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if (Data == null)
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{
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client.SendImageNotFound(m_requestedUUID);
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m_log.WarnFormat("[TEXTURE]: Got null Data element on a asset {0}.. and the missing image Data property is al", m_requestedUUID);
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return true;
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}
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// Do we have less then 1 packet's worth of data?
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else if (m_asset.Data.Length <= cFirstPacketSize)
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{
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// Send only 1 packet
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client.SendImageFirstPart(1, m_requestedUUID, (uint)m_asset.Data.Length, m_asset.Data, 2);
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m_stopPacket = 0;
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return true;
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}
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else
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{
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byte[] firstImageData = new byte[cFirstPacketSize];
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try
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{
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Buffer.BlockCopy(m_asset.Data, 0, firstImageData, 0, (int)cFirstPacketSize);
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client.SendImageFirstPart(TexturePacketCount(), m_requestedUUID, (uint)m_asset.Data.Length, firstImageData, 2);
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}
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catch (Exception)
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{
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m_log.Error("Texture block copy failed. Possibly out of memory?");
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return true;
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}
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}
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return false;
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}
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private bool SendPacket(LLClientView client)
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{
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bool complete = false;
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int imagePacketSize = ((int)m_packetNumber == (TexturePacketCount())) ? LastPacketSize() : cImagePacketSize;
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try
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{
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if ((CurrentBytePosition() + cImagePacketSize) > m_asset.Data.Length)
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{
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imagePacketSize = LastPacketSize();
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complete=true;
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if ((CurrentBytePosition() + imagePacketSize) > m_asset.Data.Length)
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{
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imagePacketSize = m_asset.Data.Length - CurrentBytePosition();
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complete = true;
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}
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}
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// It's concievable that the client might request packet one
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// from a one packet image, which is really packet 0,
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// which would leave us with a negative imagePacketSize..
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if (imagePacketSize > 0)
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{
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byte[] imageData = new byte[imagePacketSize];
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try
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{
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Buffer.BlockCopy(m_asset.Data, CurrentBytePosition(), imageData, 0, imagePacketSize);
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}
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catch (Exception e)
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{
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m_log.Error("Error copying texture block. Out of memory? imagePacketSize was " + imagePacketSize.ToString() + " on packet " + m_packetNumber.ToString() + " out of " + m_stopPacket.ToString() + ". Exception: " + e.ToString());
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return false;
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}
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//Send the packet
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client.SendImageNextPart((ushort)(m_packetNumber-1), m_requestedUUID, imageData);
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}
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if (complete)
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{
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return false;
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}
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else
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{
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return true;
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}
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}
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catch (Exception)
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{
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return false;
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}
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}
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public bool SendPackets(LLClientView client, int maxpack)
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{
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if (!m_completedSendAtCurrentDiscardLevel)
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{
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if (m_packetNumber <= m_stopPacket)
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{
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bool SendMore = true;
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if (!m_sentinfo || (m_packetNumber == 0))
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{
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if (SendFirstPacket(client))
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{
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SendMore = false;
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}
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m_sentinfo = true;
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m_packetNumber++;
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}
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// bool ignoreStop = false;
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if (m_packetNumber < 2)
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{
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m_packetNumber = 2;
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}
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int count = 0;
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while (SendMore && count < maxpack && m_packetNumber <= m_stopPacket)
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{
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count++;
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SendMore = SendPacket(client);
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m_packetNumber++;
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}
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if (m_packetNumber > m_stopPacket)
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{
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return true;
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}
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}
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}
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return false;
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}
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public void RunUpdate()
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{
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//This is where we decide what we need to update
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//and assign the real discardLevel and packetNumber
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//assuming of course that the connected client might be bonkers
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if (!m_hasasset)
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{
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if (!m_asset_requested)
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{
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m_asset_requested = true;
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m_assetCache.Get(m_requestedUUID.ToString(), this, AssetReceived);
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}
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}
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else
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{
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if (!m_decoded)
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{
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//We need to decode the requested image first
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if (!m_decoderequested)
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{
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//Request decode
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m_decoderequested = true;
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// Do we have a jpeg decoder?
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if (m_j2kDecodeModule != null)
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{
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if (Data == null)
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{
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J2KDecodedCallback(m_requestedUUID, new OpenJPEG.J2KLayerInfo[0]);
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}
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// Send it off to the jpeg decoder
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m_j2kDecodeModule.decode(m_requestedUUID, Data, J2KDecodedCallback);
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}
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else
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{
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J2KDecodedCallback(m_requestedUUID, new OpenJPEG.J2KLayerInfo[0]);
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}
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}
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}
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else
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{
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//discardLevel of -1 means just update the priority
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if (m_requestedDiscardLevel != -1)
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{
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//Evaluate the discard level
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//First, is it positive?
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if (m_requestedDiscardLevel >= 0)
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{
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if (m_requestedDiscardLevel > Layers.Length - 1)
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{
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m_discardLevel = (sbyte)(Layers.Length - 1);
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}
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else
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{
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m_discardLevel = m_requestedDiscardLevel;
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}
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//Calculate the m_stopPacket
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if (Layers.Length > 0)
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{
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m_stopPacket = (uint)GetPacketForBytePosition(Layers[(Layers.Length - 1) - m_discardLevel].End);
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//I don't know why, but the viewer seems to expect the final packet if the file
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//is just one packet bigger.
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if (TexturePacketCount() == m_stopPacket + 1)
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{
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m_stopPacket = TexturePacketCount();
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}
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}
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else
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{
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m_stopPacket = TexturePacketCount();
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}
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//Don't reset packet number unless we're waiting or it's ahead of us
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if (m_completedSendAtCurrentDiscardLevel || m_requestedPacketNumber>m_packetNumber)
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{
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m_packetNumber = m_requestedPacketNumber;
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}
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if (m_packetNumber <= m_stopPacket)
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{
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m_completedSendAtCurrentDiscardLevel = false;
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}
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}
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}
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else
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{
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m_packetNumber = m_stopPacket;
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}
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}
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}
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}
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}
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}
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