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/*
* 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.Reflection;
using System.Threading;
using System.Collections.Generic;
using log4net;
using Nini.Config;
using OpenMetaverse;
using OpenMetaverse.Imaging;
using OpenSim.Region.Environment.Interfaces;
using OpenSim.Region.Environment.Scenes;
namespace OpenSim.Region.Environment.Modules.Agent.TextureSender
{
public class J2KDecoderModule : IRegionModule, IJ2KDecoder
{
#region IRegionModule Members
private static readonly ILog m_log
= LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
/// <summary>
/// Cached Decoded Layers
/// </summary>
private readonly Dictionary<UUID, OpenJPEG.J2KLayerInfo[]> m_cacheddecode = new Dictionary<UUID, OpenJPEG.J2KLayerInfo[]>();
/// <summary>
/// List of client methods to notify of results of decode
/// </summary>
private readonly Dictionary<UUID, List<DecodedCallback>> m_notifyList = new Dictionary<UUID, List<DecodedCallback>>();
public void Initialise(Scene scene, IConfigSource source)
{
scene.RegisterModuleInterface<IJ2KDecoder>(this);
}
public void PostInitialise()
{
}
public void Close()
{
}
public string Name
{
get { return "J2KDecoderModule"; }
}
public bool IsSharedModule
{
get { return true; }
}
#endregion
#region IJ2KDecoder Members
public void decode(UUID AssetId, byte[] assetData, DecodedCallback decodedReturn)
{
// Dummy for if decoding fails.
OpenJPEG.J2KLayerInfo[] result = new OpenJPEG.J2KLayerInfo[0];
// Check if it's cached
bool cached = false;
lock (m_cacheddecode)
{
if (m_cacheddecode.ContainsKey(AssetId))
{
cached = true;
result = m_cacheddecode[AssetId];
}
}
// If it's cached, return the cached results
if (cached)
{
decodedReturn(AssetId, result);
}
else
{
// not cached, so we need to decode it
// Add to notify list and start decoding.
// Next request for this asset while it's decoding will only be added to the notify list
// once this is decoded, requests will be served from the cache and all clients in the notifylist will be updated
bool decode = false;
lock (m_notifyList)
{
if (m_notifyList.ContainsKey(AssetId))
{
m_notifyList[AssetId].Add(decodedReturn);
}
else
{
List<DecodedCallback> notifylist = new List<DecodedCallback>();
notifylist.Add(decodedReturn);
m_notifyList.Add(AssetId, notifylist);
decode = true;
}
}
// Do Decode!
if (decode)
{
doJ2kDecode(AssetId, assetData);
}
}
}
#endregion
/// <summary>
/// Decode Jpeg2000 Asset Data
/// </summary>
/// <param name="AssetId">UUID of Asset</param>
/// <param name="j2kdata">Byte Array Asset Data </param>
private void doJ2kDecode(UUID AssetId, byte[] j2kdata)
{
int DecodeTime = 0;
DecodeTime = System.Environment.TickCount;
OpenJPEG.J2KLayerInfo[] layers = new OpenJPEG.J2KLayerInfo[0]; // Dummy result for if it fails. Informs that there's only full quality
try
{
AssetTexture texture = new AssetTexture(AssetId, j2kdata);
if (texture.DecodeLayerBoundaries())
{
bool sane = true;
// Sanity check all of the layers
for (int i = 0; i < texture.LayerInfo.Length; i++)
{
if (texture.LayerInfo[i].End > texture.AssetData.Length)
{
sane = false;
break;
}
}
if (sane)
{
layers = texture.LayerInfo;
}
else
{
m_log.WarnFormat("[J2KDecoderModule]: JPEG2000 texture decoding succeeded, but sanity check failed for {0}",
AssetId);
}
}
else
{
m_log.WarnFormat("[J2KDecoderModule]: JPEG2000 texture decoding failed for {0}", AssetId);
}
texture = null; // dereference and dispose of ManagedImage
}
catch (Exception ex)
{
m_log.WarnFormat("[J2KDecoderModule]: JPEG2000 texture decoding threw an exception for {0}, {1}", AssetId, ex);
}
// Write out decode time
m_log.InfoFormat("[J2KDecoderModule]: {0} Decode Time: {1}", System.Environment.TickCount - DecodeTime, AssetId);
// Cache Decoded layers
lock (m_cacheddecode)
{
m_cacheddecode.Add(AssetId, layers);
}
// Notify Interested Parties
lock (m_notifyList)
{
if (m_notifyList.ContainsKey(AssetId))
{
foreach (DecodedCallback d in m_notifyList[AssetId])
{
if (d != null)
d.DynamicInvoke(AssetId, layers);
}
m_notifyList.Remove(AssetId);
}
}
}
}
}
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