// part 1: read from the chunk stream, returning true if enough data is here. you must take the value
// returned at `chunkStreamId`, find the chunk stream snapshot associated with that chunk stream and
// pass it to the second stage (part2) along with the opaque value.
public static bool ReadFrom1(AmfReader reader, out int chunkStreamId, out MessageHeader.Type opaque)
{
if (BasicHeader.ReadFrom(reader, out var format, out var streamId))
{
opaque = (MessageHeader.Type)format;
chunkStreamId = streamId;
return(true);
}
