public MetaBlock?NextMetaBlock()
{
if (IsDifferent)
{
return(transformingReader.NextMetaBlock());
}
var original = originalReader.NextMetaBlock();
var transformed = transformingReader.NextMetaBlock();
if (!ReferenceEquals(original, transformed)) // if the references have not changed, there was no transformation
{
IsDifferent = true;
}
return(transformed);
}
public MetaBlock?NextMetaBlock()
{
if (transformedQueue.Count == 0)
{
transformedState = original.State; // update state to match start of the next meta-block
var metaBlock = original.NextMetaBlock();
if (metaBlock != null)
{
var(transformedMetaBlocks, newTransformedState) = BrotliEncodePipeline.ApplyTransformerChain(transformedState, metaBlock, compressionParameters, transformers);
foreach (var transformedMetaBlock in transformedMetaBlocks)
{
transformedQueue.Enqueue(transformedMetaBlock);
}
transformedState = newTransformedState;
}
}
return(transformedQueue.TryDequeue(out var next) ? next : null);
}