- [x] Operation-wide allocation tracking now exercises a real 64x64 12-bit 4:4:4 frame through packed-pixel conversion, both native frame owners, picture and coefficient state, reusable block workspaces, entropy coding, OBU framing, and a non-seekable destination. It proves exactly one 60 KiB tile-output reservation from current libaom's all-intra 2.5x rule and balanced exactly-once returns for every tracked allocation before the operation completes. The focused ownership case passes 1 of 1 and the complete HEIF/AV1 namespace passes 8,863 of 8,863 direct net11 VSTest cases with zero failures or skips.
- [x] HEIF box offsets are now counted from the start of the encoded file instead of reading `Stream.Position`. This preserves ISO BMFF file-relative `iloc` offsets when the destination begins at a nonzero position and permits non-seekable output. Decoder item extents and image-sequence chunk offsets now resolve from that same file origin rather than the backing stream origin. Real legacy-JPEG HEIF round trips cover non-seekable output and a prefixed destination, while current-position AV1 decode covers both a still item and a five-frame sequence. All 96 encoder/decoder cases and all 38 sequence-parser cases pass direct net11 Release VSTest; the Release build remains at the established 1,005-warning baseline with zero errors.
- [~] Effort-six uniform luma transform selection now compares the winning ordinary spatial mode as one 8x8 transform against four raster-ordered 4x4 transforms. Each 4x4 transform searches every legal type with coefficient contexts derived from the already retained transform edges and the preceding trial blocks, while reconstructed top-right and bottom-left references follow production coding order. The strided transform operator writes each candidate directly into its 8x8 reconstruction mosaic. Prepared prediction and residual data are reused across transform trials, and the existing aligned block-workspace owner retains four final transform states, local coefficient contexts, coefficients, and compact trial reconstruction; no allocator rent, managed array, best-candidate re-transform, or full-block intermediate copy was added. Non-skipped intra-block copy under `TX_MODE_SELECT` emits and costs the unsplit variable-transform root required by current libaom, while skipped intra-block copy emits no transform-partition symbol. Uniform transform-size contexts use coding-block extents for intra-block-copy neighbors and residual-transform extents for intra neighbors. The focused contract passes 21 of 21 direct net11 Release VSTest cases, including an independently decoded stream that proves at least one real four-transform luma block. The complete non-HEVC HEIF/AV1 namespace passes 9,294 of 9,294 cases with zero failures or skips. The exact Release build remains at 1,005 baseline warnings and zero errors, Roslynk reports no touched-file diagnostics, and current-main `aomdec` accepts both generated effort-six streams with decoded-frame MD5 values`2dd1cbe449fe2d0471dc2c15c50acb69` and `677435e5af39c930af1178f91c34af6a`. Transform-size integration for filter-intra and palette, broader joint mode/transform refinement, partition search, and effort-dependent pruning remain.
- [~] Effort-six uniform luma transform selection now compares the winning ordinary spatial or filter-intra mode as one 8x8 transform against four raster-ordered 4x4 transforms. Each 4x4 transform searches every legal type with coefficient contexts derived from retained transform edges and preceding trial blocks, while reconstructed top-right and bottom-left references follow production coding order. Filter-intra trials rebuild each recursive prediction from those reconstructed edges and charge the retained filter mode in both header and coefficient syntax. The strided transform operator writes each candidate directly into its 8x8 reconstruction mosaic, and the existing aligned block-workspace owner retains prediction, residual, coefficients, contexts, compact reconstruction, and four final states; no allocator rent, managed array, best-candidate re-transform, or full-block intermediate copy was added. Non-skipped intra-block copy under `TX_MODE_SELECT` emits and costs the unsplit variable-transform root required by current libaom, while skipped intra-block copy emits no transform-partition symbol. Uniform transform-size contexts use coding-block extents for intra-block-copy neighbors and residual-transform extents for intra neighbors. The 18-case filter-intra group passes at 8, 10, and 12 bits, including full decoder syntax checks for a selected four-transform filter block, and the complete non-HEVC HEIF/AV1 namespace passes 9,297 of 9,297 cases with zero failures or skips. The exact Release build remains at 1,005 baseline warnings and zero errors. Current-main `aomdec` at `a40ed1ea9e4ecc3df58a5bccb76623f2c94ae727` accepts the three new filter-intra streams and both earlier effort-six streams; the earlier decoded-frame MD5 values remain`2dd1cbe449fe2d0471dc2c15c50acb69` and `677435e5af39c930af1178f91c34af6a`. Transform-size integration for palette, broader joint mode/transform refinement, partition search, and effort-dependent pruning remain.
James Jackson-South
4 weeks ago