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[diffusion] refactor: refactor utility ownership and document helper placement (#38699)

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Co-authored-by: Mick Qian <mickqian@users.noreply.github.com>
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Mick
2026-09-10 09:11:01 +08:00
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co-authored by Mick Qian
parent 3ff226ba8f
commit ce555ed82a
96 changed files with 1142 additions and 1287 deletions
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docs/cookbook/diffusion/SANA-WM/SANA-WM.mdx
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@@ -351,7 +351,7 @@ Header fields:
**Encodings.** `application/x-raw-rgb` is uncompressed RGB24 (3 × uint8, `bytes_per_frame = width*height*3`). `application/x-raw-rgb-delta-gzip` is the zlib-compressed **per-frame XOR delta** against the preceding frame (each frame in the batch is XOR'd against the previous one; sent by default). `realtime_output_format: "raw"` forces uncompressed RGB; `"webp"` / `"jpeg"` send preview-encoded frames.
<Note>
delta-gzip must be restored **frame-by-frame**: decompress the payload, then for each frame XOR it against the already-restored previous frame (the first frame of a batch references the last frame of the previous batch). See `restore_delta_gzip_raw_rgb_payload` in `runtime/utils/realtime_video.py`. The `"raw"` format below avoids this.
delta-gzip must be restored **frame-by-frame**: decompress the payload, then for each frame XOR it against the already-restored previous frame (the first frame of a batch references the last frame of the previous batch). See `restore_delta_gzip_raw_rgb_payload` in `runtime/realtime/video.py`. The `"raw"` format below avoids this.
</Note>
### Minimal client example