Add streaming GTCRN speech enhancement crate (ONNX via tract)#2
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czoli1976 wants to merge 3 commits into
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Add streaming GTCRN speech enhancement crate (ONNX via tract)#2czoli1976 wants to merge 3 commits into
czoli1976 wants to merge 3 commits into
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New `gtcrn` workspace crate runs the streaming GTCRN model frame-by-frame through tract-onnx (sonos/tract main): optimized plan, a single reused SimpleState, zero-copy TValue cache cycling, and a sqrt-Hann STFT/ISTFT front end matching the reference. Output matches the reference enh.wav at 0.9966 correlation. Includes a CLI (gtcrn-enhance) with RTF reporting and a per-node profiler example. https://claude.ai/code/session_015Swk2UYJHW24eCpZVuTkdG
The streaming cache updates export as ScatterNd nodes whose indices are compile-time constants. tract's generic ScatterNd walks every scattered element through dynamic ndarray views, dominating per-frame cost (~73%). Add a graph-rewrite pass (rewrite::replace_const_scatternd) that precomputes flat (dst, src) block offsets once and lowers each such ScatterNd to a custom FastScatterConst op doing a few copy_from_slice calls. All 18 nodes convert; output is bit-identical, and per-frame time drops 13.7ms -> 4.2ms (RTF ~0.85 -> ~0.24 on this container). The profiler example applies the pass too. https://claude.ai/code/session_015Swk2UYJHW24eCpZVuTkdG
Mirrors the onnxruntime measurement methodology (pure per-frame state.run loop, no STFT, warmup + best-of-5) so tract vs onnxruntime RTF can be compared apples-to-apples. Confirms ~0.23 RTF after the ScatterNd rewrite. https://claude.ai/code/session_015Swk2UYJHW24eCpZVuTkdG
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New
gtcrnworkspace crate runs the streaming GTCRN model frame-by-framethrough tract-onnx (sonos/tract main): optimized plan, a single reused
SimpleState, zero-copy TValue cache cycling, and a sqrt-Hann STFT/ISTFT
front end matching the reference. Output matches the reference enh.wav at
0.9966 correlation. Includes a CLI (gtcrn-enhance) with RTF reporting and a
per-node profiler example.
https://claude.ai/code/session_015Swk2UYJHW24eCpZVuTkdG