149 lines
4.6 KiB
Python
149 lines
4.6 KiB
Python
import collections
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from .exceptions import FilterInvalidArgument
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class Filter:
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def __init__(self):
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self.payload = None
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class Equalizer:
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"""
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Filter which represents a 15 band equalizer.
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You can adjust the dynamic of the sound using this filter.
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i.e: Applying a bass boost filter to emphasize the bass in a song.
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The format for the levels is: List[Tuple[int, float]]
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"""
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def __init__(self, *, levels: list):
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super().__init__()
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self.eq = self._factory(self, levels)
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self.raw = levels
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self.payload = {'equalizer': {'bands': self.eq}}
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def _factory(self, levels: list):
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_dict = collections.defaultdict(int)
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_dict.update(levels)
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_dict = [{"band": i, "gain": _dict[i]} for i in range(15)]
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return _dict
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def __repr__(self) -> str:
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return f"<Pomice.EqualizerFilter eq={self.eq} raw={self.raw}>"
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class Timescale(Filter):
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"""Filter which changes the speed and pitch of a track.
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Do be warned that this filter is bugged as of the lastest Lavalink dev version
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due to the filter patch not corresponding with the track time.
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In short this means that your track will either end prematurely or end later due to this.
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This is not the library's fault.
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"""
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def __init__(self, *, speed: float = 1.0, pitch: float = 1.0, rate: float = 1.0):
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super().__init__()
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if speed < 0:
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raise FilterInvalidArgument("Timescale speed must be more than 0.")
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if pitch < 0:
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raise FilterInvalidArgument("Timescale pitch must be more than 0.")
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if rate < 0:
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raise FilterInvalidArgument("Timescale rate must be more than 0.")
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self.speed = speed
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self.pitch = pitch
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self.rate = rate
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self.payload = {"timescale": {"speed": self.speed,
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"pitch": self.pitch,
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"rate": self.rate}}
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def __repr__(self):
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return f"<Pomice.TimescaleFilter speed={self.speed} pitch={self.pitch} rate={self.rate}>"
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class Karaoke(Filter):
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"""Filter which filters the vocal track from any song and leaves the instrumental.
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Best for karaoke as the filter implies.
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"""
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def __init__(
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self,
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*,
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level: float,
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mono_level: float,
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filter_band: float,
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filter_width: float
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):
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super().__init__()
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self.level = level
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self.mono_level = mono_level
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self.filter_band = filter_band
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self.filter_width = filter_width
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self.payload = {"karaoke": {"level": self.level,
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"monoLevel": self.mono_level,
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"filterBand": self.filter_band,
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"filterWidth": self.filter_width}}
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def __repr__(self):
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return (
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f"<Pomice.KaraokeFilter level={self.level} mono_level={self.mono_level} "
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f"filter_band={self.filter_band} filter_width={self.filter_width}>"
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)
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class Tremolo(Filter):
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"""Filter which produces a wavering tone in the music,
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causing it to sound like the music is changing in volume rapidly.
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"""
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def __init__(self, *, frequency: float, depth: float):
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super().__init__()
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if frequency < 0:
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raise FilterInvalidArgument(
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"Tremolo frequency must be more than 0.")
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if depth < 0 or depth > 1:
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raise FilterInvalidArgument(
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"Tremolo depth must be between 0 and 1.")
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self.frequency = frequency
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self.depth = depth
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self.payload = {"tremolo": {"frequency": self.frequency,
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"depth": self.depth}}
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def __repr__(self):
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return f"<Pomice.TremoloFilter frequency={self.frequency} depth={self.depth}>"
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class Vibrato(Filter):
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"""Filter which produces a wavering tone in the music, similar to the Tremolo filter,
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but changes in pitch rather than volume.
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"""
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def __init__(self, *, frequency: float, depth: float):
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super().__init__()
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if frequency < 0 or frequency > 14:
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raise FilterInvalidArgument(
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"Vibrato frequency must be between 0 and 14.")
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if depth < 0 or depth > 1:
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raise FilterInvalidArgument(
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"Vibrato depth must be between 0 and 1.")
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self.frequency = frequency
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self.depth = depth
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self.payload = {"vibrato": {"frequency": self.frequency,
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"depth": self.depth}}
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def __repr__(self):
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return f"<Pomice.VibratoFilter frequency={self.frequency} depth={self.depth}>"
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