resid-rs

Overview

Port of reSID, a MOS6581 SID emulator engine, to Rust.

Story

This project originated from zinc64, a Commodore 64 emulator, around Jan 2017. It evolved to the point where it can be useful to others working on C64 sound/emulation so it is packaged and shipped as a standalone crate.

Usage

Once SID register read/writes are wired up to resid, all that is left to do is to generate audio samples and push them to audio output buffer.

while delta > 0 {
    let (samples, next_delta) = self.resid.sample(delta, &mut buffer[..], 1);
    let mut output = self.sound_buffer.lock().unwrap();
    for i in 0..samples {
        output.write(buffer[i]);
    }
    delta = next_delta;
}

Components

| Component | Status | |-------------------|-------------| | Envelope | Done | | ExternalFilter | Done | | Filter | Done | | Sampler | Done | | Spline | Done | | Wave | Done | | Sid | Done |

Changelog

• 0.3 - compliance with the original resid
• 0.4 - full sampler support
• 0.5 - closed performance gap largely due to resampling
• 0.6 - SIMD optimization
• 0.7 - continuous integration and GPLv3
• 0.8 - documentation and api refinements/internal cleanup
• 0.9 - migration to Rust 2018
• 1.0 - no_std support

Credits

• Thanks to Dag Lem for his reSID implementation
• Thanks to Daniel Collin for motivating me to put this out and helping out with code optimization
• Commodore folks for building an iconic 8-bit machine
• Rust developers for providing an incredible language to develop in