# ------------------------------------------------------------
# AAC Coder/Decoder - Configuration
#
# Multimedia course at Aristotle University of
# Thessaloniki (AUTh)
#
# Author:
#   Christos Choutouridis (ΑΕΜ 8997)
#   cchoutou@ece.auth.gr
#
# Description:
#   This module contains the global configurations
#
# ------------------------------------------------------------
from __future__ import annotations

# Imports
from typing import Final

from core.aac_types import WinType

# Filterbank
# ------------------------------------------------------------
# Window type
# Options: "SIN", "KBD"
WIN_TYPE: WinType = "SIN"


# TNS
# ------------------------------------------------------------
PRED_ORDER = 4
QUANT_STEP = 0.1
QUANT_MAX = 0.7  # 4-bit symmetric with step 0.1 -> clamp to [-0.7, +0.7]


# -----------------------------------------------------------------------------
# Psycho
# -----------------------------------------------------------------------------

NMT_DB: Final[float] = 6.0   # Noise Masking Tone (dB)
TMN_DB: Final[float] = 18.0  # Tone Masking Noise (dB)