3b6fd99989
WAI is a container + capability-dispatch standard for media. It does not re-implement codecs; it dispatches to SOTA standard libraries (PNG, FLAC, zstd as the mandatory floor; AVIF, JPEG-XL, Opus, AV1, XZ as the recommended modern set) and adds an envelope that lets a neural shared-prior path coexist with the model-free floor. The capability a file requires is named, not supplied. Two paths open every conforming file: the neural condition (sink regenerates from a shared ambient prior) and the zeroth condition (registered SOTA codec menu). Apache-2.0. Adds: - wai/SPEC.md — WAI v1.0 spec (envelope, manifest, capability dispatch, registered capabilities including v1.1 multi-rendition extension) - wai/wai-rs/ — Rust reference implementation: lib + cdylib + staticlib, C FFI, 11 capability + envelope round-trip tests passing - wai/wai-web/ — wasm-bindgen wrapper for browser sinks - wai/wai-neural/ — Python tooling for neural-condition models - wai/tools/ — codec export + encode helpers (Python) - wai/corpus/CORPUS.md — third-party test corpus reacquisition guide Updates README.md to list four standards instead of three. Known consumer: CommunicationOS uses WAI for media transport over MoQT/MLS sessions. Co-Authored-By: Claude Opus 4.7 (1M context) <[email protected]>
25 lines
1.3 KiB
Rust
25 lines
1.3 KiB
Rust
fn psnr(a: &[u8], b: &[u8]) -> f64 {
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let n = a.len().min(b.len());
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let mse: f64 = (0..n).map(|i| (a[i] as f64 - b[i] as f64).powi(2)).sum::<f64>() / n as f64;
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if mse <= 1e-12 { 99.0 } else { 10.0 * (255.0_f64.powi(2) / mse).log10() }
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}
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fn main() {
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let p = "/Users/dcharlot/data-share/vibe-coding/web_standard_new/corpus/image/synthetic/deadleaves.png";
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let bytes = std::fs::read(p).unwrap();
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let (rgb, h, w) = wai::codecs::image::png_decode(&bytes).unwrap();
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println!("source {}×{} px", w, h);
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for q in [50u8, 80] {
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let wai = wai::codecs::image::jpeg_encode(&rgb, h, w, q).unwrap();
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std::fs::write(format!("/tmp/dl_q{q}.jpg"), &wai).unwrap();
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let (wai_dec, _, _) = wai::codecs::image::jpeg_decode(&wai).unwrap();
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let ff = std::process::Command::new("ffmpeg").args([
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"-v", "error", "-i", &format!("/tmp/dl_q{q}.jpg"),
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"-f", "rawvideo", "-pix_fmt", "rgb24", "-"
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]).output().unwrap().stdout;
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let psnr_src_wai = psnr(&rgb, &wai_dec);
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let psnr_src_ff = psnr(&rgb, &ff);
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let psnr_wai_vs_ff = psnr(&wai_dec, &ff);
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println!(" q={q}: src-vs-WAI={:.2} src-vs-ffmpeg={:.2} WAI-vs-ffmpeg={:.2} dB (interop threshold 35)",
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psnr_src_wai, psnr_src_ff, psnr_wai_vs_ff);
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}
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}
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