nes_rust_slim 0.2.0

NES emulator written in Rust
Documentation 
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use audio::{Audio, BUFFER_CAPACITY};

pub struct DefaultAudio {
    buffer_index: usize,
    buffer: [f32; BUFFER_CAPACITY],
    previous_value: f32,
}

impl DefaultAudio {
    pub fn new() -> Self {
        DefaultAudio {
            buffer_index: 0,
            buffer: [0.0; BUFFER_CAPACITY],
            previous_value: 0.0,
        }
    }
}

impl Audio for DefaultAudio {
    fn push(&mut self, value: f32) {
        if self.buffer_index >= BUFFER_CAPACITY {
            return;
        }
        self.buffer[self.buffer_index] = value;
        self.buffer_index += 1;
    }

    fn copy_sample_buffer(&mut self, sample_buffer: &mut [f32]) {
        // @TODO: Remove side effect?

        // @TODO: Remove magic number
        let client_sample_buffer_length = 4096;

        for i in 0..client_sample_buffer_length {
            sample_buffer[i] = match i >= self.buffer_index {
                true => self.previous_value,
                false => self.buffer[i],
            };
            self.previous_value = sample_buffer[i];
        }
        for i in client_sample_buffer_length..self.buffer.len() {
            self.buffer[i - client_sample_buffer_length] = self.buffer[i];
        }
        self.buffer_index = match self.buffer_index < client_sample_buffer_length {
            true => 0,
            false => self.buffer_index - client_sample_buffer_length,
        };
    }
}