audio_controller_class_example.py

"""
Per session GetMute() SetMute() GetMasterVolume() SetMasterVolume() using
SimpleAudioVolume.
"""

from pycaw.pycaw import AudioUtilities


class AudioController:
    def __init__(self, process_name):
        self.process_name = process_name
        self.volume = self.process_volume()

    def mute(self):
        sessions = AudioUtilities.GetAllSessions()
        for session in sessions:
            interface = session.SimpleAudioVolume
            if session.Process and session.Process.name() == self.process_name:
                interface.SetMute(1, None)
                print(self.process_name, "has been muted.")  # debug

    def unmute(self):
        sessions = AudioUtilities.GetAllSessions()
        for session in sessions:
            interface = session.SimpleAudioVolume
            if session.Process and session.Process.name() == self.process_name:
                interface.SetMute(0, None)
                print(self.process_name, "has been unmuted.")  # debug

    def process_volume(self):
        sessions = AudioUtilities.GetAllSessions()
        for session in sessions:
            interface = session.SimpleAudioVolume
            if session.Process and session.Process.name() == self.process_name:
                print("Volume:", interface.GetMasterVolume())  # debug
                return interface.GetMasterVolume()

    def set_volume(self, decibels):
        sessions = AudioUtilities.GetAllSessions()
        for session in sessions:
            interface = session.SimpleAudioVolume
            if session.Process and session.Process.name() == self.process_name:
                # only set volume in the range 0.0 to 1.0
                self.volume = min(1.0, max(0.0, decibels))
                interface.SetMasterVolume(self.volume, None)
                print("Volume set to", self.volume)  # debug

    def decrease_volume(self, decibels):
        sessions = AudioUtilities.GetAllSessions()
        for session in sessions:
            interface = session.SimpleAudioVolume
            if session.Process and session.Process.name() == self.process_name:
                # 0.0 is the min value, reduce by decibels
                self.volume = max(0.0, self.volume - decibels)
                interface.SetMasterVolume(self.volume, None)
                print("Volume reduced to", self.volume)  # debug

    def increase_volume(self, decibels):
        sessions = AudioUtilities.GetAllSessions()
        for session in sessions:
            interface = session.SimpleAudioVolume
            if session.Process and session.Process.name() == self.process_name:
                # 1.0 is the max value, raise by decibels
                self.volume = min(1.0, self.volume + decibels)
                interface.SetMasterVolume(self.volume, None)
                print("Volume raised to", self.volume)  # debug


def main():
    audio_controller = AudioController("chrome.exe")
    audio_controller.set_volume(1.0)
    audio_controller.mute()
    audio_controller.decrease_volume(0.25)
    audio_controller.increase_volume(0.05)
    audio_controller.unmute()


if __name__ == "__main__":
    main()