diff --git a/OpenSim/Region/CoreModules/Agent/TextureSender/J2KDecoderModule.cs b/OpenSim/Region/CoreModules/Agent/TextureSender/J2KDecoderModule.cs index 3a1d9a31f7..3343204840 100644 --- a/OpenSim/Region/CoreModules/Agent/TextureSender/J2KDecoderModule.cs +++ b/OpenSim/Region/CoreModules/Agent/TextureSender/J2KDecoderModule.cs @@ -211,7 +211,89 @@ namespace OpenSim.Region.CoreModules.Agent.TextureSender else { - m_log.WarnFormat("[J2KDecoderModule]: JPEG2000 texture decoding failed for {0}", AssetId); + /* + Random rnd = new Random(); + // scramble ends for test + for (int i = 0; i < texture.LayerInfo.Length; i++) + { + texture.LayerInfo[i].End = rnd.Next(999999); + } + */ + + // Try to do some heuristics error correction! Yeah. + bool sane2Heuristics = true; + + if (texture.LayerInfo.Length == 0) + sane2Heuristics = false; + + if (sane2Heuristics) + { + // Last layer start is less then the end of the file and last layer start is greater then 0 + if (texture.LayerInfo[texture.LayerInfo.Length - 1].Start < texture.AssetData.Length && texture.LayerInfo[texture.LayerInfo.Length - 1].Start > 0) + { + } + else + { + sane2Heuristics = false; + } + + } + + if (sane2Heuristics) + { + int start = 0; + + // try to fix it by using consistant data in the start field + for (int i = 0; i < texture.LayerInfo.Length; i++) + { + if (i == 0) + start = 0; + + if (i == texture.LayerInfo.Length - 1) + texture.LayerInfo[i].End = texture.AssetData.Length; + else + texture.LayerInfo[i].End = texture.LayerInfo[i + 1].Start - 1; + + // in this case, the end of the next packet is less then the start of the last packet + // after we've attempted to fix it which means the start of the last packet is borked + // there's no recovery from this + if (texture.LayerInfo[i].End < start) + { + sane2Heuristics = false; + break; + } + + if (texture.LayerInfo[i].End < 0 || texture.LayerInfo[i].End > texture.AssetData.Length) + { + sane2Heuristics = false; + break; + } + + if (texture.LayerInfo[i].Start < 0 || texture.LayerInfo[i].Start > texture.AssetData.Length) + { + sane2Heuristics = false; + break; + } + + start = texture.LayerInfo[i].Start; + } + } + + if (sane2Heuristics) + { + layers = texture.LayerInfo; + fCache.SaveFileCacheForAsset(AssetId, layers); + + + // Write out decode time + m_log.InfoFormat("[J2KDecoderModule]: HEURISTICS SUCCEEDED {0} Decode Time: {1}", Environment.TickCount - DecodeTime, + AssetId); + + } + else + { + m_log.WarnFormat("[J2KDecoderModule]: JPEG2000 texture decoding failed for {0}", AssetId); + } } texture = null; // dereference and dispose of ManagedImage }