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"""Ultrastar Converter"""
from modules.Ultrastar.ultrastar_txt import UltrastarTxtValue
def real_bpm_to_ultrastar_bpm(real_bpm: float) -> float:
"""Converts real BPM to UltraStar BPM"""
# The UltraStar BPM info is a fourth beat of the real BPM
ultrastar_bpm = real_bpm / 4
return ultrastar_bpm
def ultrastar_bpm_to_real_bpm(ultrastar_bpm: float) -> float:
"""Converts UltraStar BPM to real BPM"""
# The UltraStar BPM info is a fourth beat of the real BPM
bpm = ultrastar_bpm * 4
return bpm
def second_to_beat(seconds: float, real_bpm: float) -> float:
"""Converts seconds to beat"""
# BPM = 60 * beat / T
# T * BPM = 60 * beat
# beat = T * BPM / 60
beat = seconds * real_bpm / 60
return beat
def beat_to_second(beat: float, real_bpm: float) -> float:
"""Converts beat to seconds"""
seconds = beat * 60 / real_bpm
return seconds
def midi_note_to_ultrastar_note(midi_note: int) -> int:
"""Converts Midi note to UltraStar note"""
# C4 == 48 in Midi
ultrastar_note = midi_note - 48
return ultrastar_note
def ultrastar_note_to_midi_note(ultrastar_note: int) -> int:
"""Converts UltraStar note to Midi note"""
# C4 == 48 in Midi
midi_note = ultrastar_note + 48
return midi_note
def get_start_time_from_ultrastar(ultrastar_class: UltrastarTxtValue, pos: int) -> float:
"""Calculates the start time from the Ultrastar txt"""
gap = int(ultrastar_class.gap) / 1000
real_bpm = ultrastar_bpm_to_real_bpm(
float(ultrastar_class.bpm.replace(",", "."))
)
start_time = (
beat_to_second(int(ultrastar_class.startBeat[pos]), real_bpm) + gap
)
return start_time
def get_end_time_from_ultrastar(ultrastar_class: UltrastarTxtValue, pos: int) -> float:
"""Calculates the end time from the Ultrastar txt"""
gap = int(ultrastar_class.gap) / 1000
real_bpm = ultrastar_bpm_to_real_bpm(
float(ultrastar_class.bpm.replace(",", "."))
)
end_time = (
beat_to_second(
int(ultrastar_class.startBeat[pos])
+ int(ultrastar_class.durations[pos]),
real_bpm,
)
+ gap
)
return end_time
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