void cSoundStream::CreateChunks()
{
DeleteChunks();
if(CalculateChunkSize() == 0)
return;
for(unsigned int i = m_Chunks.size(); i < EngineSettings::GetMaxQueuedSoundStreamBuffers(); ++i)
{
m_Chunks.push_back(new FixedArray<char>(CalculateChunkSize()));
m_FreeChunks.push_back(m_Chunks.back());
}
}
void FSignedArchiveReader::PrecacheChunks(TArray<FSignedArchiveReader::FReadInfo>& Chunks, int64 Length)
{
// Request all the chunks that are needed to complete this read
int64 DataOffset;
int64 DestOffset = 0;
int32 FirstChunkIndex = CalculateChunkIndex(PakOffset);
int64 ChunkStartOffset = CalculateChunkOffset(PakOffset, DataOffset);
int32 NumChunks = (DataOffset - ChunkStartOffset + Length) / FPakInfo::MaxChunkDataSize + 1;
int64 RemainingLength = Length;
int64 ArchiveOffset = PakOffset;
// And then try to precache 'PrecacheLength' more chunks because it's likely
// we're going to try to read them next
if ((NumChunks + FirstChunkIndex + PrecacheLength - 1) < ChunkCount)
{
NumChunks += PrecacheLength;
}
Chunks.Empty(NumChunks);
for (int32 ChunkIndexOffset = 0; ChunkIndexOffset < NumChunks; ++ChunkIndexOffset)
{
ChunkStartOffset = CalculateChunkOffset(ArchiveOffset, DataOffset);
int64 SizeToReadFromBuffer = RemainingLength;
if (DataOffset + SizeToReadFromBuffer > ChunkStartOffset + FPakInfo::MaxChunkDataSize)
{
SizeToReadFromBuffer = ChunkStartOffset + FPakInfo::MaxChunkDataSize - DataOffset;
}
FReadInfo ChunkInfo;
ChunkInfo.SourceOffset = DataOffset - ChunkStartOffset;
ChunkInfo.DestOffset = DestOffset;
ChunkInfo.Size = SizeToReadFromBuffer;
const int32 ChunkIndex = ChunkIndexOffset + FirstChunkIndex;
if (LastCachedChunk.ChunkIndex == ChunkIndex)
{
ChunkInfo.Request = NULL;
ChunkInfo.PreCachedChunk = &LastCachedChunk;
}
else
{
const int64 ChunkSize = CalculateChunkSize(ChunkIndex);
ChunkInfo.Request = &SignatureChecker->RequestChunk(ChunkIndex, ChunkStartOffset, ChunkSize);
ChunkInfo.PreCachedChunk = NULL;
}
Chunks.Add(ChunkInfo);
ArchiveOffset += SizeToReadFromBuffer;
DestOffset += SizeToReadFromBuffer;
RemainingLength -= SizeToReadFromBuffer;
}
}
