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#![feature(use_extern_macros)]
#![allow(non_camel_case_types)]
#[macro_use] extern crate finite_fields;

finite_fields::binary_type! { b2, 2 }

/// Descriptor for code types.
pub enum CodeType {
  FIRCode,
  IIRCode
}

/// A description of a convolutional code, either nonrecursive (FIR), or
/// recursive (IIR), including start state.
pub struct Code {
  /// The starting state of the registers.
  pub start_state: b2,
  /// Storage of the binary polynomial coefficients. Each polynomial corresponds
  /// to an output bit in the order in which they are stored.
  ///
  /// Coefficients are defined in order of increasing delay, e.g. `coefs[0][0]`
  /// is applied to `signal[n]`, and `coefs[1]` is applied to `signal[n-1]`, and
  /// so on.
  pub polys: Vec<b2>, // TODO make static length array
  /// Enum describing the type of the code (FIR or IIR).
  pub code_type: CodeType
}

pub mod encoders;
// pub mod viterbi;
// pub mod bcjr;