j2k-transcode

JPEG-to-HTJ2K coefficient-domain transcode crate for J2K.

The crate owns the CPU transcode pipeline and shared accelerator hooks. CUDA and Metal adapters can accelerate supported stages, but the public transcode entry points assemble HTJ2K codestreams. Unsupported source classes and modes return explicit errors.

Resident handoff descriptors such as ResidentJpegDctGrid, ResidentDwtSubband, and ResidentCodestreamBuffer provide validated metadata contracts for backend adapters that keep transcode stages in device memory.

Links

• API docs: https://docs.rs/j2k-transcode
• Repository: https://github.com/frames-sg/j2k
• Support policy: https://github.com/frames-sg/j2k/blob/main/docs/public-support.md