windows-volume-control 0.1.1

A simple library to control audio interfaces from within rust using the windows api
Documentation 
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use windows::Win32::Foundation::BOOL;
use windows::core::GUID;
use windows::Win32::Media::Audio::Endpoints::IAudioEndpointVolume;
use windows::Win32::Media::Audio::ISimpleAudioVolume;

use std::process::exit;
pub trait Session {
    unsafe fn getAudioEndpointVolume(&self) -> Option<IAudioEndpointVolume>;
    unsafe fn getName(&self) -> String;
    unsafe fn getVolume(&self) -> f32;
    unsafe fn setVolume(&self, vol: f32);
    unsafe fn getMute(&self) -> bool;
    unsafe fn setMute(&self, mute: bool);
}

pub struct EndPointSession {
    simple_audio_volume: IAudioEndpointVolume,
    name: String,
    guid: GUID
}
impl EndPointSession {
    pub fn new(simple_audio_volume: IAudioEndpointVolume, name: String) -> Self {
        let guid = GUID::new().unwrap_or_else(|err| {
            eprintln!("ERROR: Couldn't generate GUID {err}");
            exit(1);
        });

        Self {
            simple_audio_volume: simple_audio_volume,
            name: name,
            guid: guid
        }
    }
}

impl Session for EndPointSession {
    unsafe fn getAudioEndpointVolume(&self) -> Option<IAudioEndpointVolume> {
        Some(self.simple_audio_volume.clone())
    }

    unsafe fn getName(&self) -> String {
        self.name.clone()
    }
    unsafe fn getVolume(&self) -> f32 {
        self.simple_audio_volume
            .GetMasterVolumeLevelScalar()
            .unwrap_or_else(|err| {
                eprintln!("ERROR: Couldn't get volume {err}");
                0.0
            })
    }
    unsafe fn setVolume(&self, vol: f32) {
        self.simple_audio_volume
            .SetMasterVolumeLevelScalar(vol, &self.guid)
            .unwrap_or_else(|err| {
                eprintln!("ERROR: Couldn't set volume: {err}");
            });
    }
    unsafe fn setMute(&self, mute: bool) {
        self.simple_audio_volume
            .SetMute(mute, &self.guid)
            .unwrap_or_else(|err| {
                eprintln!("ERROR: Couldn't set mute: {err}");
        });
    }
    unsafe fn getMute(&self) -> bool {
        self.simple_audio_volume
            .GetMute()
            .unwrap_or_else(|err| {
                eprintln!("ERROR: Couldn't get mute {err}");
                BOOL(0)
            })
            .as_bool()
    }
}

pub struct ApplicationSession {
    simple_audio_volume: ISimpleAudioVolume,
    name: String,
    guid: GUID,
}

impl ApplicationSession {
    pub fn new(simple_audio_volume: ISimpleAudioVolume, name: String) -> Self {
        let guid = GUID::new().unwrap_or_else(|err| {
            eprintln!("ERROR: Couldn't generate GUID {err}");
            exit(1);
        });
        
        Self {
            simple_audio_volume: simple_audio_volume,
            name: name,
            guid: guid,
        }
    }
}

impl Session for ApplicationSession {
    unsafe fn getAudioEndpointVolume(&self) -> Option<IAudioEndpointVolume> {
        None
    }

    unsafe fn getName(&self) -> String {
        self.name.clone()
    }
    unsafe fn getVolume(&self) -> f32 {
        self.simple_audio_volume
            .GetMasterVolume()
            .unwrap_or_else(|err| {
                eprintln!("ERROR: Couldn't get volume {err}");
                0.0
            })
    }
    unsafe fn setVolume(&self, vol: f32) {
        self.simple_audio_volume
            .SetMasterVolume(vol, &self.guid)
            .unwrap_or_else(|err| {
                eprintln!("ERROR: Couldn't set volume: {err}");
            });
    }
    unsafe fn setMute(&self, mute: bool) {
        self.simple_audio_volume
            .SetMute(mute, &self.guid)
            .unwrap_or_else(|err| {
                eprintln!("ERROR: Couldn't set mute: {err}");
        });
    }
    unsafe fn getMute(&self) -> bool {
        self.simple_audio_volume
            .GetMute()
            .unwrap_or_else(|err| {
                eprintln!("ERROR: Couldn't get mute {err}");
                BOOL(0)
            })
            .as_bool()
    }
}