/// <summary>
/// The sample rate is read from the flac header here.
/// This can be extracted from bits 145-164 of the stream.
/// More information: https://xiph.org/flac/format.html#metadata_block_streaminfo.
/// </summary>
/// <param name="stream">The flac file stream.</param>
/// <returns>The sample rate.</returns>
public static Fin <uint> ReadSampleRate(Stream stream)
{
long position = stream.Seek(SampleRateOffset, SeekOrigin.Begin);
Debug.Assert(position == 18, $"Expected stream.Seek position to return 18, instead returned {position}");
Span <byte> buffer = stackalloc byte[3];
int bytesRead = stream.Read(buffer);
if (bytesRead != buffer.Length)
{
return(FileTooShort);
}
return(BinaryHelpers.Read20BitUnsignedBigEndianIgnoringLastNibble(buffer));
}