pub(all) suberror ParseError {
  BadMagic
  BadVersion(Int)
  Truncated(Int)
  LengthMismatch(String)
  BadCrc(UInt, UInt)
  BadSampleRate(Double)
  BadSampleCount(String)
  BadSid(String)
  BadTime(String)
  UnsupportedEncoding(Int)
  MalformedExtraHeaders(String)
}

pub(all) struct FixedHeader {
  version : Int
  flags : Int
  time_ns : UInt
  time_year : Int
  time_doy : Int
  time_hour : Int
  time_min : Int
  time_sec : Int
  encoding : Int
  sample_rate : Double
  sample_count : UInt
  crc : UInt
  publication_version : Int
  identifier_length : Int
  extra_headers_length : Int
  payload_length : UInt
} derive(Eq, 
@moonbitlang/core/debug.Debug
Debug)

fn crc32c(data : Bytes) -> UInt

fn crc32c_region(data : Bytes, start : Int, end : Int, crc_offset : Int) -> UInt

fn fixed_header_size() -> Int

fn parse_header(raw : Bytes, off : Int) -> Result[FixedHeader, ParseError]

fn verify_crc(raw : Bytes, start : Int, end : Int, crc_offset : Int) -> Bool