must

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import os
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import ctypes
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import log
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class BaseWrapper:
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    def __init__(self) -> None:
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        self.lib: ctypes.CDLL = None  # noqa
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    def wrap(self, func_name: str, args: tuple = (), res: any = ctypes.c_void_p) -> any:
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        try:
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            result = getattr(self.lib, func_name)
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        except AttributeError:
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            log.warn('Failed to import function', func_name)
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            return None
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        result.argtypes = args
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        result.restype = res
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        return result
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class BaseMusic:
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    def __init__(self, fp: str) -> None:
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        self.fp = fp
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        self.fn = os.path.basename(fp)
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        self.fn_no_ext = os.path.splitext(self.fn)[0]
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        self.type = 'none'
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        self.paused = False
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        self.freq = 0.0
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        self.bits = 0.0
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        self.length = 0.0
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        self.pitch = 1.0
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    def play(self) -> None:
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        pass
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    def stop(self) -> None:
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        pass
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    def set_paused(self, paused: bool) -> None:
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        pass
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    def is_playing(self) -> bool:
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        pass
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    def set_volume(self, volume: float = 1.0) -> None:
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        pass
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    def set_speed(self, speed: float = 1.0) -> None:
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        pass
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    def set_pos(self, pos: float) -> None:
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        pass
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    def get_pos(self) -> float:
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        pass
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    def destroy(self) -> None:
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        pass
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class BaseBackend:
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    def __init__(self) -> None:
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        self.title = 'Base'
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    def init(self) -> None:
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        pass
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    def open_music(self, fp: str) -> BaseMusic:
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        pass
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    def quit(self) -> None:
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        pass
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    def destroy(self) -> None:
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        pass
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    def get_audio_devices_names(self) -> list:
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        pass
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    def get_current_audio_device_name(self) -> str:
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        pass
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    def get_audio_drivers(self) -> list:
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        pass
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    def get_current_audio_driver(self) -> str:
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        pass
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    def update(self) -> None:
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        pass
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    def rewind(self) -> None:
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        pass
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