oximedia-codec

Video and audio codec implementations for the OxiMedia multimedia framework. Pure-Rust, royalty-free codecs with image I/O support.

Part of the oximedia workspace — a comprehensive pure-Rust media processing framework.

Overview

oximedia-codec provides encoding and decoding for royalty-free video codecs plus image I/O:

Usage

Add to your Cargo.toml:

[dependencies]
oximedia-codec = "0.1.1"
# or with additional codecs:
oximedia-codec = { version = "0.1.1", features = ["av1", "vp9", "vp8", "opus"] }

AV1 Decoding

use oximedia_codec::{VideoDecoder, Av1Decoder};

let mut decoder = Av1Decoder::new(&codec_params)?;
decoder.send_packet(&packet)?;
while let Some(frame) = decoder.receive_frame()? {
    // Process decoded frame
}

VP9 Decoding

use oximedia_codec::Vp9Decoder;

let mut decoder = Vp9Decoder::new(&codec_params)?;
decoder.send_packet(&packet)?;
while let Some(frame) = decoder.receive_frame()? {
    // Process decoded frame
}

VP8 Decoding

use oximedia_codec::Vp8Decoder;

let mut decoder = Vp8Decoder::new()?;
let frame = decoder.decode(&packet_data)?;

Opus Decoding

use oximedia_codec::opus::OpusDecoder;

let mut decoder = OpusDecoder::new(48000, 2)?;
let audio_frame = decoder.decode_packet(&packet_data)?;

Architecture

Unified Traits

All codecs implement unified traits:

pub trait VideoDecoder {
    fn send_packet(&mut self, packet: &EncodedPacket) -> CodecResult<()>;
    fn receive_frame(&mut self) -> CodecResult<Option<VideoFrame>>;
    fn flush(&mut self) -> CodecResult<()>;
}

pub trait VideoEncoder {
    fn send_frame(&mut self, frame: &VideoFrame) -> CodecResult<()>;
    fn receive_packet(&mut self) -> CodecResult<Option<EncodedPacket>>;
    fn flush(&mut self) -> CodecResult<Vec<EncodedPacket>>;
}

Rate Control Modes

SIMD Support

The codec includes a SIMD abstraction layer:

• Scalar fallback (always available)
• SSE/AVX support (x86/x64)
• NEON support (ARM)

Module Structure (194 source files, 3046 public items)

src/
├── lib.rs              # Crate root with re-exports
├── error.rs            # CodecError and CodecResult
├── frame.rs            # VideoFrame, Plane, ColorInfo
├── traits.rs           # VideoDecoder, VideoEncoder traits
├── av1/                # AV1 codec (OBU parsing, symbol coding, entropy)
├── vp9/                # VP9 codec (frame, context)
├── vp8/                # VP8 codec (DCT, motion, loop filter)
├── theora/             # Theora codec (VP3-based)
├── opus/               # Opus audio (SILK, CELT, range decoder)
├── intra/              # Shared intra prediction
├── motion/             # Motion estimation
├── rate_control/       # Rate control framework
├── reconstruct/        # Reconstruction pipeline
├── entropy_coding/     # Entropy coding
├── tile_encoder/       # Tile-based encoding
└── simd/               # SIMD abstraction (scalar, SSE/AVX, NEON)

Patent Policy

All codecs are royalty-free:

Supported codecs: AV1, VP9, VP8, Theora, Opus

Rejected codecs: H.264, H.265, AAC, AC-3, DTS

When a patent-encumbered codec is detected in a container, a PatentViolation error is returned.

Policy

• No unsafe code (#![deny(unsafe_code)])
• Apache-2.0 license

License

Apache-2.0 — Copyright 2024-2026 COOLJAPAN OU (Team Kitasan)