emerald 0.3.214

A lite, fully featured 2D game engine.
Documentation 
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use crate::{
    audio::{Mixer, SoundInstanceId, SoundKey},
    AssetEngine, EmeraldError,
};

pub struct DummyMixer {}
impl DummyMixer {
    pub fn new() -> Result<Box<Self>, EmeraldError> {
        Ok(Box::new(DummyMixer {}))
    }
}

impl Mixer for DummyMixer {
    fn play(
        &mut self,
        _key: &SoundKey,
        _asset_store: &mut AssetEngine,
    ) -> Result<SoundInstanceId, EmeraldError> {
        Ok(SoundInstanceId::new(0))
    }

    fn play_and_loop(
        &mut self,
        _key: &SoundKey,
        _asset_store: &mut AssetEngine,
    ) -> Result<SoundInstanceId, EmeraldError> {
        Ok(SoundInstanceId::new(0))
    }
    fn get_volume(&self) -> Result<f32, EmeraldError> {
        Ok(0.0)
    }
    fn set_volume(&mut self, _volume: f32) -> Result<(), EmeraldError> {
        Ok(())
    }
    fn set_instance_volume(
        &mut self,
        _snd_instance_id: SoundInstanceId,
        _volume: f32,
    ) -> Result<(), EmeraldError> {
        Ok(())
    }
    fn get_instances(&self) -> Result<Vec<SoundInstanceId>, EmeraldError> {
        Ok(Vec::new())
    }
    fn stop(&mut self, _snd_instance_id: SoundInstanceId) -> Result<(), EmeraldError> {
        Ok(())
    }
    fn pause(&mut self, _snd_instance_id: SoundInstanceId) -> Result<(), EmeraldError> {
        Ok(())
    }
    fn resume(&mut self, _snd_instance_id: SoundInstanceId) -> Result<(), EmeraldError> {
        Ok(())
    }
    fn clear(&mut self) -> Result<(), EmeraldError> {
        Ok(())
    }
    fn post_update(&mut self) -> Result<(), EmeraldError> {
        Ok(())
    }
}