1 files changed, 354 insertions, 0 deletions

diff --git a/OpenSim/Region/ClientStack/LindenUDP/J2KImage.cs b/OpenSim/Region/ClientStack/LindenUDP/J2KImage.cs
new file mode 100644
index 0000000..d8cf9a7
--- /dev/null
+++ b/OpenSim/Region/ClientStack/LindenUDP/J2KImage.cs
@@ -0,0 +1,354 @@
+/*
+ * Copyright (c) Contributors, http://opensimulator.org/
+ * See CONTRIBUTORS.TXT for a full list of copyright holders.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of the OpenSim Project nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+using System;
+using System.Collections.Generic;
+using OpenMetaverse;
+using OpenMetaverse.Imaging;
+using OpenSim.Framework;
+using OpenSim.Region.Framework.Interfaces;
+using log4net;
+using System.Reflection;
+
+namespace OpenSim.Region.ClientStack.LindenUDP
+{
+    /*
+     * 
+     *          J2KImage
+     *          
+     *          We use this class to store image data and associated request data and attributes
+     *          
+     * 
+     * 
+     */
+
+    public class J2KImage
+    {
+        private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
+        public double m_designatedPriorityKey;
+        public double m_requestedPriority = 0.0d;
+        public uint m_lastSequence = 0;
+        public uint m_requestedPacketNumber;
+        public sbyte m_requestedDiscardLevel;
+        public UUID m_requestedUUID;
+        public IJ2KDecoder m_j2kDecodeModule;
+        public IAssetCache m_assetCache;
+        public OpenJPEG.J2KLayerInfo[] Layers = new OpenJPEG.J2KLayerInfo[0];
+        public AssetBase m_MissingSubstitute = null;
+        public bool m_decoded = false;
+        public bool m_completedSendAtCurrentDiscardLevel;
+        
+        private sbyte m_discardLevel=-1;
+        private uint m_packetNumber;
+        private bool m_decoderequested = false;
+        private bool m_hasasset = false;
+        private bool m_asset_requested = false;
+        private bool m_sentinfo = false;
+        private uint m_stopPacket = 0;
+        private const int cImagePacketSize = 1000;
+        private const int cFirstPacketSize = 600;
+        private AssetBase m_asset = null;
+        
+
+        public uint m_pPacketNumber
+        {
+            get { return m_packetNumber; }
+        }
+        public uint m_pStopPacketNumber
+        {
+            get { return m_stopPacket; }
+        }
+
+        public byte[] Data
+        {
+            get { return m_asset.Data; }
+        }
+
+        public ushort TexturePacketCount()
+        {
+            if (!m_decoded)
+                return 0;
+            return (ushort)(((m_asset.Data.Length - cFirstPacketSize + cImagePacketSize - 1) / cImagePacketSize) + 1);
+        }
+
+        public void J2KDecodedCallback(UUID AssetId, OpenJPEG.J2KLayerInfo[] layers)
+        {
+           Layers = layers;
+           m_decoded = true;
+           RunUpdate();
+        }
+
+        public void AssetDataCallback(UUID AssetID, AssetBase asset)
+        {
+            m_hasasset = true;
+            if (asset == null || asset.Data == null)
+            {
+                m_asset = m_MissingSubstitute;
+            }
+            else
+            {
+                m_asset = asset;              
+            }
+            RunUpdate();
+        }
+
+        private int GetPacketForBytePosition(int bytePosition)
+        {
+            return ((bytePosition - cFirstPacketSize + cImagePacketSize - 1) / cImagePacketSize) + 1;
+        }
+        public int LastPacketSize()
+        {
+            if (m_packetNumber == 1)
+                return m_asset.Data.Length;
+            return (m_asset.Data.Length - cFirstPacketSize) % cImagePacketSize;
+        }
+ 
+        public int CurrentBytePosition()
+        {
+            if (m_packetNumber == 0)
+                return 0;
+            if (m_packetNumber == 1)
+                return cFirstPacketSize;
+
+            int result = cFirstPacketSize + ((int)m_packetNumber - 2) * cImagePacketSize;
+            if (result < 0)
+            {
+                result = cFirstPacketSize;
+            }
+            return result;
+        }
+        public bool SendFirstPacket(LLClientView client)
+        {
+
+            // Do we have less then 1 packet's worth of data?
+            if (m_asset.Data.Length <= cFirstPacketSize)
+            {
+                // Send only 1 packet
+                client.SendImageFirstPart(1, m_requestedUUID, (uint)m_asset.Data.Length, m_asset.Data, 2);
+                m_stopPacket = 0;
+                return true;
+            }
+            else
+            {
+                byte[] firstImageData = new byte[cFirstPacketSize];
+                try 
+                { 
+                    Buffer.BlockCopy(m_asset.Data, 0, firstImageData, 0, (int)cFirstPacketSize);
+                    client.SendImageFirstPart(TexturePacketCount(), m_requestedUUID, (uint)m_asset.Data.Length, firstImageData, 2);                
+                }
+                catch (Exception)
+                {
+                    m_log.Error("Texture block copy failed. Possibly out of memory?");
+                    return true;
+                }
+            }
+            return false;
+
+        }
+        private bool SendPacket(LLClientView client)
+        {
+            bool complete = false;
+            int imagePacketSize = ((int)m_packetNumber == (TexturePacketCount())) ? LastPacketSize() : cImagePacketSize;
+
+            if ((CurrentBytePosition() + cImagePacketSize) > m_asset.Data.Length)
+            {
+                imagePacketSize = LastPacketSize();
+                complete=true;
+                if ((CurrentBytePosition() + imagePacketSize) > m_asset.Data.Length)
+                {
+                    imagePacketSize = m_asset.Data.Length - CurrentBytePosition();
+                    complete = true;
+                }
+            }
+            
+            //It's concievable that the client might request packet one
+            //from a one packet image, which is really packet 0,
+            //which would leave us with a negative imagePacketSize..
+            if (imagePacketSize > 0)
+            {
+                byte[] imageData = new byte[imagePacketSize];
+                try
+                {
+                    Buffer.BlockCopy(m_asset.Data, CurrentBytePosition(), imageData, 0, imagePacketSize);
+                }
+                catch (Exception e)
+                {
+                    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());
+                    return false;
+                }
+
+                //Send the packet
+                client.SendImageNextPart((ushort)(m_packetNumber-1), m_requestedUUID, imageData);
+                
+            }
+            if (complete)
+            {
+                return false;
+            }
+            else
+            {
+                return true;
+            }
+
+
+        }
+        public bool SendPackets(LLClientView client)
+        {
+
+            if (!m_completedSendAtCurrentDiscardLevel)
+            {
+                if (m_packetNumber <= m_stopPacket)
+                {
+
+                    bool SendMore = true;
+                    if (!m_sentinfo || (m_packetNumber == 0))
+                    {
+                        if (SendFirstPacket(client))
+                        {
+                            SendMore = false;
+                        }
+                        m_sentinfo = true;
+                        m_packetNumber++;
+                    }
+
+                    if (m_packetNumber < 2)
+                    {
+                        m_packetNumber = 2;
+                    }
+                    
+                    int count=0;  
+                    while (SendMore && count < 5 && m_packetNumber <= m_stopPacket)
+                    {
+                        count++;
+                        SendMore = SendPacket(client);
+                        m_packetNumber++;
+                    }
+                    if (m_packetNumber > m_stopPacket)
+                    {
+
+                        return true;
+
+                    }
+
+                }
+
+            }
+            return false;
+        }
+
+        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 (!m_hasasset)
+            {
+
+                if (!m_asset_requested)
+                {
+                    m_asset_requested = true;
+                    m_assetCache.GetAsset(m_requestedUUID, AssetDataCallback, true);
+
+                }
+
+            }
+            else
+            {
+
+
+                if (!m_decoded)
+                {
+                    //We need to decode the requested image first
+                    if (!m_decoderequested)
+                    {
+                        //Request decode
+                        m_decoderequested = true;
+                        // Do we have a jpeg decoder?
+                        if (m_j2kDecodeModule != null)
+                        {
+                            // Send it off to the jpeg decoder
+                            m_j2kDecodeModule.decode(m_requestedUUID, Data, J2KDecodedCallback);
+
+                        }
+                        else
+                        {
+                            J2KDecodedCallback(m_requestedUUID, new OpenJPEG.J2KLayerInfo[0]);
+                        }
+                    }
+
+                }
+                else
+                {
+
+   
+                    //discardLevel of -1 means just update the priority
+                    if (m_requestedDiscardLevel != -1)
+                    {
+
+                        //Evaluate the discard level
+                        //First, is it positive?
+                        if (m_requestedDiscardLevel >= 0)
+                        {
+                            if (m_requestedDiscardLevel > Layers.Length - 1)
+                            {
+                                m_discardLevel = (sbyte)(Layers.Length - 1);
+                            }
+                            else
+                            {
+                                m_discardLevel = m_requestedDiscardLevel;
+                            }
+                
+                            //Calculate the m_stopPacket
+                            if (Layers.Length > 0)
+                            {
+                                m_stopPacket = (uint)GetPacketForBytePosition(Layers[(Layers.Length - 1) - m_discardLevel].End);
+                            }
+                            else
+                            {
+                                m_stopPacket = TexturePacketCount();
+                            }
+                            //Don't reset packet number unless we're waiting or it's ahead of us
+                            if (m_completedSendAtCurrentDiscardLevel || m_requestedPacketNumber>m_packetNumber)
+                            {
+                                m_packetNumber = m_requestedPacketNumber;
+                            }
+                   
+                            if (m_packetNumber <= m_stopPacket)
+                            {
+                                m_completedSendAtCurrentDiscardLevel = false;
+                            }
+
+                        }
+
+                    }
+                }
+            }
+        }
+
+    }
+}