public override void SetBytes(Stream file, int chunkLength, long offsetPos, bool assemblyMode)
{
//Factor in the bytes we have already read elsewhere.
int bytesToRead = chunkLength - (BlockTypeLength + ResourceTypeLength);
int bytesRead = 0;
//Number of resources in this block.
file.Read(CHUNK_BYTE_BUFFER, 0, ChunkByteLength);
this.objectCount = BitConverter.ToInt32(CHUNK_BYTE_BUFFER, 0);
//Preallocate size of collection to avoid resize calls (memory optimization)
this.resourceDatabase = new Dictionary <UInt32, AssetResource>(this.objectCount);
bytesRead += ChunkByteLength;
//Loop and create index elements.
while (bytesRead < bytesToRead)
{
file.Read(CHUNK_BYTE_BUFFER, 0, ChunkByteLength);
int resourceChunkLength = BitConverter.ToInt32(CHUNK_BYTE_BUFFER, 0);
int bytesLeftToRead = resourceChunkLength;
file.Read(CHUNK_BYTE_BUFFER, 0, ChunkByteLength);
UInt32 referenceID = BitConverter.ToUInt32(CHUNK_BYTE_BUFFER, 0);
bytesLeftToRead -= ChunkByteLength;
file.Read(SIMPLE_BYTE_BUFFER, 0, SimpleByteLength);
bool streamed = BitConverter.ToBoolean(SIMPLE_BYTE_BUFFER, 0);
bytesLeftToRead -= SimpleByteLength;
file.Read(CHUNK_BYTE_BUFFER, 0, ChunkByteLength);
int metaDataType = BitConverter.ToInt32(CHUNK_BYTE_BUFFER, 0);
bytesLeftToRead -= ChunkByteLength;
file.Read(CHUNK_BYTE_BUFFER, 0, ChunkByteLength);
int metadataLength = BitConverter.ToInt32(CHUNK_BYTE_BUFFER, 0);
bytesLeftToRead -= ChunkByteLength;
//Optmization, some nodes lack these fields.
byte[] metaData = null;
if (metadataLength > 0)
{
metaData = new byte[metadataLength];
file.Read(metaData, 0, metadataLength);
bytesLeftToRead -= metadataLength;
}
byte[] dataBuffer = null;
//The are used for streamed nodes.
UInt32 streamPosition = 0;
UInt32 streamLength = 0;
//Optmization, some nodes lack these fields.
if (bytesLeftToRead != 0)
{
streamPosition = (UInt32)(file.Position + offsetPos);
streamLength = (UInt32)bytesLeftToRead;
if (assemblyMode)
{
streamPosition = (UInt32)(file.Position + offsetPos);
streamLength = (UInt32)bytesLeftToRead;
dataBuffer = new byte[bytesLeftToRead];
file.Read(dataBuffer, 0, bytesLeftToRead);
}
else
{
//Streamed nodes dont load the byte data into memory, only save the location of where it is in the file.
//We also allow the caller to stream all data so that we can create the resources without putting pressure om memory.
if (streamed || this.streamResources)
{
file.Seek(bytesLeftToRead, SeekOrigin.Current);
}
else
{
dataBuffer = new byte[bytesLeftToRead];
file.Read(dataBuffer, 0, bytesLeftToRead);
}
}
}
AssetResource resource = new AssetResource(streamed, streamPosition, streamLength);
resource.Deserialize(referenceID, metaDataType, metaData, dataBuffer, assemblyMode);
//Use hashmap indexing, faster to lookup.
this.resourceDatabase.Add(referenceID, resource);
bytesRead += resourceChunkLength + ChunkByteLength;
}
#if VERBOSE_LOG
Debug.Log("Resourceblock length: " + chunkLength);
#endif
}
