@ -29,7 +29,7 @@ Checkboxes may be marked complete only when the implementation and the verificat
## Delivery dashboard
## Delivery dashboard
Last reconciled with the source tree on 2026-08-29 against production checkpoint `864b11ad9791d3254a38691246270c569001b5a1`. Committed checkpoints include the AV1 transform architecture, OBU framing, intra-block copy, 12-profile reconstruction matrix, layered-item properties, layered reference/header/CDF/motion-field state, inter-frame intra blocks, SIMD-first translational prediction, complete single-reference inter reconstruction, compound reference trees and modes, paired reference-MV derivation, reference-dependent bounded sequence decoding, allocation-free SIMD-first equal averaging, selected inter-intra prediction, and selectable distance-weighted, wedge, and difference-weighted compound blending. Four pinned bounded sequences pass exact native-plane and presentation comparison, normative syntax and production reconstruction pass directly at 8/10/12 bit, SIMD-first mask and blend paths pass through `FeatureTestRunner`, and constrained allocation returns every tracked buffer exactly once. Both source targets build with zero warnings and errors; the `net10.0` test project builds with zero errors and its 1,013 pre-existing warnings; 25 direct focused cases and six `FeatureTestRunner` cases pass without failures or skips; the documentation review is complete; and `git diff --check` is clean. This dashboard is the authoritative delivery order. The detailed phase checklists below provide subsystem evidence; they do not override the current-stage marker or permit work to skip ahead.
Last reconciled with the source tree on 2026-08-29 against committed production checkpoint `59a4fbad5ed3bc7c34331c4bdc65acc7acde3f04` plus the locally complete scaled-reference checkpoint awaiting commit. Committed checkpoints include the AV1 transform architecture, OBU framing, intra-block copy, 12-profile reconstruction matrix, layered-item properties, layered reference/header/CDF/motion-field state, inter-frame intra blocks, SIMD-first translational prediction, complete single-reference inter reconstruction, compound reference trees and modes, paired reference-MV derivation, reference-dependent bounded sequence decoding, allocation-free SIMD-first equal averaging, selected inter-intra prediction, selectable compound blending, and OBMC. The local checkpoint adds exact Q14 reference scaling, variable-phase Q10 separable convolution, size-changing production reconstruction, scaled OBMC neighbors, the normative 288-sample retained border, and per-block inter deblocking decisions. Its pinned 40x40-to-80x80 bounded AVIF passes exact base and final native-plane comparison, exact final presentation comparison, normal and scalar `FeatureTestRunner` execution, constrained allocation, and collision-free exactly-once ownership tracking. Both source targets build with zero warnings and errors; the `net10.0` test project builds with zero errors and its 1,013 pre-existing warnings; 87 focused `net10.0` cases pass without failures or skips; and the documentation and diff checks are complete. This dashboard is the authoritative delivery order. The detailed phase checklists below provide subsystem evidence; they do not override the current-stage marker or permit work to skip ahead.
Status meanings:
Status meanings:
@ -39,15 +39,15 @@ Status meanings:
- **Not started:** supporting primitives may exist, but the production format path is absent.
- **Not started:** supporting primitives may exist, but the production format path is absent.
- **Current:** the only work item that should be advanced before taking the next queued item.
- **Current:** the only work item that should be advanced before taking the next queued item.
Current development stage: **Stage 3 — complete AV1 still-image decoding.** The decoder retains reference/header/CDF/motion-field state, derives frame-level skip-mode references, consumes temporal segment prediction, decodes intra-coded blocks inside inter frames, reconstructs single-reference NEAREST/NEAR/NEW/GLOBAL translational blocks, and reconstructs equal-average, distance-weighted, wedge, difference-weighted, and inter-intra prediction before residual traversal. Commit `864b11ad9791d3254a38691246270c569001b5a1` records the selectable-compound checkpoint. OBMC is current; warped motion, scaled references, and non-translational global prediction remain explicitly unsupported. Neither AV1 nor HEVC production encoding is implemented.
Current development stage: **Stage 3 — complete AV1 still-image decoding.** The decoder retains reference/header/CDF/motion-field state, derives frame-level skip-mode references, consumes temporal segment prediction, decodes intra-coded blocks inside inter frames, and reconstructs translational single-reference, compound, inter-intra, OBMC, and scaled-reference prediction before residual traversal. The scaled-reference implementation and independent evidence are complete locally; its checkpoint commit is the only remaining gate before warped motion becomes current. Warped motion and non-translational global prediction remain explicitly unsupported. Neither AV1 nor HEVC production encoding is implemented.
Immediate checkpoint: **implement and independently verify OBMC before advancing to scaled references.** Preserve the committed translational and compound-prediction contracts, keep predictor workspaces allocator-owned and allocation-free per block, and require independently encoded bounded AVIF content with exact native-plane comparison for the production OBMC branch. This work remains inside the existing image-item and bounded image-sequence surfaces and must not expand into a general ISO BMFF/video model.
Immediate checkpoint: **commit the complete scaled-reference implementation and its verified evidence before advancing to warped motion.** The production branch, independent native and presentation comparisons, constrained allocator coverage, Release builds, focused tests, documentation review, and diff validation are complete. This work remains inside the existing image-item and bounded image-sequence surfaces and does not expand into a general ISO BMFF/video model.
| Order | Delivery stage | State | Delivered state | Gate that remains open |
| Order | Delivery stage | State | Delivered state | Gate that remains open |
| --- | --- | --- | --- | --- |
| --- | --- | --- | --- | --- |
| 1 | Baseline, provenance, documentation, and public contract | In progress | Pinned codec references, a bounded image-only scope, encoder options, typed bit depth, decoder-option propagation, and extensive HEIF documentation exist. | Complete the all-file documentation audit, record a fresh Release baseline, finish distinct public HEIC/AVIF save boundaries, and close API review. |
| 1 | Baseline, provenance, documentation, and public contract | In progress | Pinned codec references, a bounded image-only scope, encoder options, typed bit depth, decoder-option propagation, and extensive HEIF documentation exist. | Complete the all-file documentation audit, record a fresh Release baseline, finish distinct public HEIC/AVIF save boundaries, and close API review. |
| 2 | Bounded HEIF item and image-sequence container | In progress | Still-item parsing, grids, auxiliary alpha, metadata properties, bounded image-sequence tracks, Identify, and all-sync AV1 sequence presentation are connected. | Complete adversarial boundary coverage, remaining item/property behavior, reference-dependent sequence reconstruction, and the bounded sequence writer. |
| 2 | Bounded HEIF item and image-sequence container | In progress | Still-item parsing, grids, auxiliary alpha, metadata properties, bounded image-sequence tracks, Identify, and all-sync AV1 sequence presentation are connected. | Complete adversarial boundary coverage, remaining item/property behavior, reference-dependent sequence reconstruction, and the bounded sequence writer. |
| 3 | Still-image AV1 and HEVC decoding | **Current** | HEVC reconstruction reaches exact HM/libheif fixtures across the recorded 8/10/12-bit and chroma cases. AV1 work includes bounded OBU framing, reconstruction, filters, grain, color, transforms, intra-block copy, an exact independent 12-profile bit-depth/chroma matrix through every dispatch tier, retained layered reference/header/CDF/motion-field state, temporal segment prediction, inter-frame intra blocks, SIMD-first translational prediction, exact single-reference inter reconstruction, exact equal-average compound reconstruction, and committed selectable compound and inter-intra reconstruction through reference-dependent bounded sequences. | Implement OBMC, scaled-reference, warped, and non-translational global prediction; remove every other valid AV1 still-image unsupported branch with independent vectors; then complete the remaining HEVC profile and Range Extensions matrix. |
| 3 | Still-image AV1 and HEVC decoding | **Current** | HEVC reconstruction reaches exact HM/libheif fixtures across the recorded 8/10/12-bit and chroma cases. AV1 work includes bounded OBU framing, reconstruction, filters, grain, color, transforms, intra-block copy, an exact independent 12-profile bit-depth/chroma matrix through every dispatch tier, retained layered reference/header/CDF/motion-field state, temporal segment prediction, inter-frame intra blocks, SIMD-first translational prediction, exact single-reference inter reconstruction, exact equal-average and selectable compound reconstruction, inter-intra prediction, committed OBMC, and a locally complete independently verified scaled-reference branch. | Commit scaled-reference, then implement warped and non-translational global prediction; remove every other valid AV1 still-image unsupported branch with independent vectors; then complete the remaining HEVC profile and Range Extensions matrix. |
| 4 | Complete decoded presentation and animation | In progress | Shared SIMD-first AV1/HEVC color conversion, ICC application, grids, transforms, direct planar alpha composition, frame metadata, repetition, and independently decodable AV1 sequence samples exist. | Close the full color/ICC cross-product, HEVC sequence decoding, AV1/HEVC reference-dependent samples, frame-local metadata/alpha behavior, and independent animated decode vectors. |
| 4 | Complete decoded presentation and animation | In progress | Shared SIMD-first AV1/HEVC color conversion, ICC application, grids, transforms, direct planar alpha composition, frame metadata, repetition, and independently decodable AV1 sequence samples exist. | Close the full color/ICC cross-product, HEVC sequence decoding, AV1/HEVC reference-dependent samples, frame-local metadata/alpha behavior, and independent animated decode vectors. |
| 5 | AV1/AVIF encoding | Not started | RGB-to-planar conversion, forward transforms, OBU writer foundations, options, and container-writing infrastructure exist. | `HeifEncoderCore` still rejects AV1. Implement a real independently decodable lossy/lossless AV1 payload and the complete AVIF item/metadata matrix. |
| 5 | AV1/AVIF encoding | Not started | RGB-to-planar conversion, forward transforms, OBU writer foundations, options, and container-writing infrastructure exist. | `HeifEncoderCore` still rejects AV1. Implement a real independently decodable lossy/lossless AV1 payload and the complete AVIF item/metadata matrix. |
| 6 | HEVC/HEIC encoding | Not started | Shared input color conversion, options, and HEIF writer infrastructure exist. | `HeifEncoderCore` still rejects HEVC. Implement a real independently decodable lossy/lossless HEVC payload and the complete HEIC item/metadata matrix. |
| 6 | HEVC/HEIC encoding | Not started | Shared input color conversion, options, and HEIF writer infrastructure exist. | `HeifEncoderCore` still rejects HEVC. Implement a real independently decodable lossy/lossless HEVC payload and the complete HEIC item/metadata matrix. |
@ -90,7 +90,9 @@ Immediate checkpoint: **implement and independently verify OBMC before advancing
- [x] Decode all compound reference-pair trees and inter modes, retain paired spatial/temporal reference-MV candidates through DRL selection, and reconstruct two translational predictors with allocation-free equal-weight averaging across 8/10/12-bit samples without changing the single-reference predictor contract or rounding model.
- [x] Decode all compound reference-pair trees and inter modes, retain paired spatial/temporal reference-MV candidates through DRL selection, and reconstruct two translational predictors with allocation-free equal-weight averaging across 8/10/12-bit samples without changing the single-reference predictor contract or rounding model.
- [x] Verify the equal-average production branch with the pinned 19-frame libavif YUV444 sequence. The final native Y, U, and V planes match pinned libaom exactly, final RGBA presentation matches pinned libavif exactly, production `DecodeBlock()` is covered at 8/10/12 bit, constrained plane allocation passes, and allocator tracking returns every retained and temporal motion-field buffer exactly once.
- [x] Verify the equal-average production branch with the pinned 19-frame libavif YUV444 sequence. The final native Y, U, and V planes match pinned libaom exactly, final RGBA presentation matches pinned libavif exactly, production `DecodeBlock()` is covered at 8/10/12 bit, constrained plane allocation passes, and allocator tracking returns every retained and temporal motion-field buffer exactly once.
- [x] Decode selected inter-intra prediction and selectable distance-weighted, wedge, and difference-weighted compound blending. Normative-order syntax, direct 8/10/12-bit production reconstruction, SIMD/scalar arithmetic, four pinned bounded sequences, exact final native planes and presentation, constrained contiguous planes, and balanced allocator returns pass. Both source targets build with zero warnings and errors; the test project builds with zero errors and pre-existing repository warnings; 25 direct focused cases and six `FeatureTestRunner` cases pass without failures or skips; and `git diff --check` is clean.
- [x] Decode selected inter-intra prediction and selectable distance-weighted, wedge, and difference-weighted compound blending. Normative-order syntax, direct 8/10/12-bit production reconstruction, SIMD/scalar arithmetic, four pinned bounded sequences, exact final native planes and presentation, constrained contiguous planes, and balanced allocator returns pass. Both source targets build with zero warnings and errors; the test project builds with zero errors and pre-existing repository warnings; 25 direct focused cases and six `FeatureTestRunner` cases pass without failures or skips; and `git diff --check` is clean.
- [x] Decode and reconstruct above and left OBMC through allocator-owned prediction workspaces, exact pinned masks, and the existing SIMD-first masked blender. Commit `59a4fbad5ed3bc7c34331c4bdc65acc7acde3f04` records direct 8/10/12-bit production reconstruction, 4:2:0 and 4:2:2 overlap geometry, a real 19-frame YUV444 sequence containing more than one hundred traced OBMC blocks, exact final pinned-libaom native planes, exact pinned-libavif presentation through normal and scalar `FeatureTestRunner` configurations, constrained tracked allocation, zero-warning `net10.0` and `net11.0` source builds, a zero-error analyzer build with 1,013 pre-existing warnings, 14 direct focused cases plus the feature-isolated comparison, and clean staged `git diff --check`.
- [x] Decode and independently verify scaled-reference prediction through exact Q14/Q10 arithmetic, allocation-free SIMD/scalar convolution, 8/10/12-bit production reconstruction, scaled OBMC, active inter deblocking, constrained allocation, and a genuine size-changing bounded AVIF.
- [ ] **Queued until the scaled-reference commit:** decode warped motion, then non-translational global-motion prediction.
- [ ] Verify every remaining connected mode and filter with independently encoded bounded AV1 content and exact native-plane comparisons.
- [ ] Verify every remaining connected mode and filter with independently encoded bounded AV1 content and exact native-plane comparisons.
- [ ] Return the explicitly selected spatial layer or the final displayed layer, keeping reference reconstruction separate from display-only film grain.
- [ ] Return the explicitly selected spatial layer or the final displayed layer, keeping reference reconstruction separate from display-only film grain.
- [ ] Verify color and auxiliary-alpha output exactly against both pinned libavif progressive fixtures under normal SIMD dispatch and all required `FeatureTestRunner` fallbacks.
- [ ] Verify color and auxiliary-alpha output exactly against both pinned libavif progressive fixtures under normal SIMD dispatch and all required `FeatureTestRunner` fallbacks.
@ -306,8 +308,9 @@ This snapshot pins or classifies the available references and failures; it does
| `ObuReader.ReadSequenceHeader`, `ReadUncompressedFrameHeader`, decoder-model parsing, and operating-parameter consumption | AV1 sections 5.5.2 through 5.5.4 sequence timing and decoder-model syntax, section 5.9.2 uncompressed frame-header syntax, and section 5.9.31 temporal-point syntax | libaom `av1/decoder/decodeframe.c` functions `av1_read_decoder_model_info`, `av1_read_op_parameters_info`, `read_temporal_point_info`, and `read_uncompressed_header`, plus `common/av1_config.c`, at `03087864cf4bea6abb0d28f95cf7843511413d8f` | Read the normative 32-bit decoding-tick field; consume operating-point buffer delays and the layer-applicable frame removal times needed to keep a non-reduced still-image sequence aligned; and read presentation time only under the normative decoder-model condition. Retain no scheduling or playback behavior from those values and introduce no ISO BMFF timing, track, sample-table, or sequence surface. |
| `ObuReader.ReadSequenceHeader`, `ReadUncompressedFrameHeader`, decoder-model parsing, and operating-parameter consumption | AV1 sections 5.5.2 through 5.5.4 sequence timing and decoder-model syntax, section 5.9.2 uncompressed frame-header syntax, and section 5.9.31 temporal-point syntax | libaom `av1/decoder/decodeframe.c` functions `av1_read_decoder_model_info`, `av1_read_op_parameters_info`, `read_temporal_point_info`, and `read_uncompressed_header`, plus `common/av1_config.c`, at `03087864cf4bea6abb0d28f95cf7843511413d8f` | Read the normative 32-bit decoding-tick field; consume operating-point buffer delays and the layer-applicable frame removal times needed to keep a non-reduced still-image sequence aligned; and read presentation time only under the normative decoder-model condition. Retain no scheduling or playback behavior from those values and introduce no ISO BMFF timing, track, sample-table, or sequence surface. |
| `Av1FrameBuffer` high-bit-depth sample layout and `Av1YuvConverter` 10/12-bit packed-pixel conversion | AV1 section 6.4.1 bit depth and H.273 sample-range scaling | libaom `aom_scale/yv12config.h`, `av1/common/idct.c`, and `av1/common/reconintra.c` at `03087864cf4bea6abb0d28f95cf7843511413d8f`; libavif `src/avif.c` and `src/reformat.c` at `092276ce89098ead06db80975173191e5fee1826` | Establish two-byte native sample storage with sample-unit strides for 10/12-bit reconstruction and use ImageSharp's existing `Rgb48` pixel-operation paths in both directions so packed-pixel staging does not reduce high-bit-depth samples to eight bits. |
| `Av1FrameBuffer` high-bit-depth sample layout and `Av1YuvConverter` 10/12-bit packed-pixel conversion | AV1 section 6.4.1 bit depth and H.273 sample-range scaling | libaom `aom_scale/yv12config.h`, `av1/common/idct.c`, and `av1/common/reconintra.c` at `03087864cf4bea6abb0d28f95cf7843511413d8f`; libavif `src/avif.c` and `src/reformat.c` at `092276ce89098ead06db80975173191e5fee1826` | Establish two-byte native sample storage with sample-unit strides for 10/12-bit reconstruction and use ImageSharp's existing `Rgb48` pixel-operation paths in both directions so packed-pixel staging does not reduce high-bit-depth samples to eight bits. |
| `Av1PredictionDecoder`, `Av1IntraPredictor`, `Av1ChromaFromLumaContext`, `Av1ChromaFromLumaPredictor`, `Av1PartitionInfo`, and the DC, directional, Paeth, smooth, filter-intra, and chroma-from-luma predictor operators | AV1 sections 7.11.2 and 7.11.2.3 intra prediction | libaom `aom_dsp/intrapred.c`, `av1/common/reconintra.c`, `av1/common/av1_common_int.h`, `av1/common/blockd.h`, `av1/common/cfl.c`, and `av1/common/cfl.h` at `03087864cf4bea6abb0d28f95cf7843511413d8f` | Design the shared predictor contract, sample layout, reference preparation, and scratch ownership for widest-to-narrowest SIMD traversal, then provide the equivalent scalar fallback through that contract. Preserve luma/chroma mode-neighbor addressing, directional upsampling, Paeth selection, smooth normalization, filter-intra taps, high-bit-depth clipping, chroma-from-luma storage/subsampling, and chroma-from-luma row strides. The WIP rectangular byte-pipeline smooth digest expectations encode width/height-swapped weights and must be replaced only from an independently generated oracle, not regenerated from this implementation. |
| `Av1PredictionDecoder`, `Av1IntraPredictor`, `Av1ChromaFromLumaContext`, `Av1ChromaFromLumaPredictor`, `Av1PartitionInfo`, and the DC, directional, Paeth, smooth, filter-intra, and chroma-from-luma predictor operators | AV1 sections 7.11.2 and 7.11.2.3 intra prediction | libaom `aom_dsp/intrapred.c`, `av1/common/reconintra.c`, `av1/common/av1_common_int.h`, `av1/common/blockd.h`, `av1/common/cfl.c`, and `av1/common/cfl.h` at `03087864cf4bea6abb0d28f95cf7843511413d8f` | Design the shared predictor contract, sample layout, reference preparation, and scratch ownership for widest-to-narrowest SIMD traversal, then provide the equivalent scalar fallback through that contract. Preserve luma/chroma mode-neighbor addressing, directional upsampling, Paeth selection, smooth normalization, filter-intra taps, high-bit-depth clipping, chroma-from-luma storage/subsampling, and chroma-from-luma row strides. The WIP rectangular byte-pipeline smooth digest expectations encode width/height-swapped weights and must be replaced only from an independently generated oracle, not regenerated from this implementation. |
| `Av1ReferenceScale`, `Av1InterPredictor` scaled operators, `Av1BlockDecoder` scaled-reference traversal, and `Av1FrameBuffer` prediction border | AV1 sections 7.11.3.3 reference scaling and 7.11.3.4 block inter prediction | libaom `av1/common/scale.c`, `av1/common/scale.h`, `av1/common/reconinter.h`, `av1/decoder/decodeframe.c`, `av1/common/convolve.c`, `av1/common/filter.h`, and `aom_scale/yv12config.h` at `03087864cf4bea6abb0d28f95cf7843511413d8f` | Preserve Q14 reference scale factors, Q10 variable phases and steps, signed coordinate rounding, scaled UMV margins, the 288-sample reference border, reduced filter selection, bit-depth-dependent two-pass rounding, and byte/high-bit-depth clipping. A four-output `Vector128` gather-shaped traversal and exact scalar tail share one behavior model and caller-owned scratch. The production path covers ordinary, compound, and OBMC prediction without per-block allocation. |
| `Av1TileReader` palette mode/color-map parsing, `Av1SymbolDecoder` palette distributions, `Av1BlockModeInfo` palette state, and `Av1PredictionDecoder` palette reconstruction | AV1 sections 5.11.46, 5.11.49, and 7.11.2 palette prediction | libaom `av1/decoder/decodemv.c`, `av1/decoder/detokenize.c`, `av1/decoder/decoder.h`, `av1/common/pred_common.c`, `av1/common/pred_common.h`, and `av1/common/entropymode.c` at `03087864cf4bea6abb0d28f95cf7843511413d8f` | Reuse the existing tile range decoder and frame-owned mode map while porting the normative palette cache merge, high-bit-depth color deltas, tile-adaptive mode/size/index distributions, diagonal color-map traversal, edge padding, and direct palette-sample reconstruction. This is AV1 still-image compression syntax and does not add retained video reference state or any ISO BMFF surface. |
| `Av1TileReader` palette mode/color-map parsing, `Av1SymbolDecoder` palette distributions, `Av1BlockModeInfo` palette state, and `Av1PredictionDecoder` palette reconstruction | AV1 sections 5.11.46, 5.11.49, and 7.11.2 palette prediction | libaom `av1/decoder/decodemv.c`, `av1/decoder/detokenize.c`, `av1/decoder/decoder.h`, `av1/common/pred_common.c`, `av1/common/pred_common.h`, and `av1/common/entropymode.c` at `03087864cf4bea6abb0d28f95cf7843511413d8f` | Reuse the existing tile range decoder and frame-owned mode map while porting the normative palette cache merge, high-bit-depth color deltas, tile-adaptive mode/size/index distributions, diagonal color-map traversal, edge padding, and direct palette-sample reconstruction. This is AV1 still-image compression syntax and does not add retained video reference state or any ISO BMFF surface. |
| `Av1DeblockingFilter`, `Av1LoopFilterContext`, and `Av1LoopFilterDecoder` | AV1 section 7.14 deblocking loop filter | libaom `aom_dsp/loopfilter.c` and `av1/common/av1_loopfilter.c` at `03087864cf4bea6abb0d28f95cf7843511413d8f` | Design the 8- and high-bit-depth edge layout and 4-, 6-, 8-, and 14-tap kernels for SIMD-first traversal, with sharpness thresholds, still-frame intra filter-level derivation, transform-edge selection, and plane traversal shared by the exact scalar fallback. Implement and verify both through the same contract before enabling the stage. This is normative AV1 image reconstruction and adds neither generic ISO BMFF models nor retained video reference state. |
| `Av1DeblockingFilter`, `Av1LoopFilterContext`, and `Av1LoopFilterDecoder` | AV1 section 7.14 deblocking loop filter | libaom `aom_dsp/loopfilter.c` and `av1/common/av1_loopfilter.c` at `03087864cf4bea6abb0d28f95cf7843511413d8f` | Preserve the 8- and high-bit-depth edge layout and 4-, 6-, 8-, and 14-tap kernels for SIMD-first traversal, with sharpness thresholds, per-block intra/inter reference and mode deltas, current and previous skipped-transform decisions, transform and prediction-unit edge selection, and plane traversal shared by the exact scalar fallback. This is normative AV1 image reconstruction and adds neither generic ISO BMFF models nor retained video reference state. |
| `Av1CdefDecoder`, `Av1CdefFilter`, and CDEF-unit strength storage | AV1 sections 7.15.2 through 7.15.4 constrained directional enhancement filtering | libaom `av1/common/cdef.c`, `av1/common/cdef_block.c`, `av1/common/cdef.h`, and `av1/common/cdef_block.h` at `03087864cf4bea6abb0d28f95cf7843511413d8f` | Design direction search and constrained primary/secondary filtering around vector-friendly block storage and SIMD-first kernels, with variance adjustment, subsampling direction conversion, skipped-8x8 selection, and frame-edge sentinel behavior shared by the scalar fallback. Use a frame-owned source snapshot so filtering never consumes already modified samples. This is normative AV1 still-image reconstruction and introduces no ISO BMFF, track, timing, or sequence-playback surface. |
| `Av1CdefDecoder`, `Av1CdefFilter`, and CDEF-unit strength storage | AV1 sections 7.15.2 through 7.15.4 constrained directional enhancement filtering | libaom `av1/common/cdef.c`, `av1/common/cdef_block.c`, `av1/common/cdef.h`, and `av1/common/cdef_block.h` at `03087864cf4bea6abb0d28f95cf7843511413d8f` | Design direction search and constrained primary/secondary filtering around vector-friendly block storage and SIMD-first kernels, with variance adjustment, subsampling direction conversion, skipped-8x8 selection, and frame-edge sentinel behavior shared by the scalar fallback. Use a frame-owned source snapshot so filtering never consumes already modified samples. This is normative AV1 still-image reconstruction and introduces no ISO BMFF, track, timing, or sequence-playback surface. |
| `Av1SuperResolutionDecoder`, `Av1SuperResolutionFilter`, frame-size derivation, and decoded-image dimensions | AV1 section 7.16 normative super-resolution upscaling | libaom `av1/common/resize.c`, `av1/common/resize.h`, `av1/common/convolve.c`, `av1/common/x86/av1_convolve_horiz_rs_sse4.c`, and `aom_dsp/aom_filter.h` at `03087864cf4bea6abb0d28f95cf7843511413d8f` | Port the fixed 64-phase, 8-tap horizontal filter, phase/step derivation, replicated frame edges, chroma width rounding, signed rounding, and 8/10/12-bit clipping. Follow libaom's four-output multiply/add, two-stage horizontal reduction, packed-store traversal with exact scalar fallback. Generic image resizing is not normative AV1 super-resolution. This adds no track, timing, fragment, animation, or generic ISO BMFF model. |
| `Av1SuperResolutionDecoder`, `Av1SuperResolutionFilter`, frame-size derivation, and decoded-image dimensions | AV1 section 7.16 normative super-resolution upscaling | libaom `av1/common/resize.c`, `av1/common/resize.h`, `av1/common/convolve.c`, `av1/common/x86/av1_convolve_horiz_rs_sse4.c`, and `aom_dsp/aom_filter.h` at `03087864cf4bea6abb0d28f95cf7843511413d8f` | Port the fixed 64-phase, 8-tap horizontal filter, phase/step derivation, replicated frame edges, chroma width rounding, signed rounding, and 8/10/12-bit clipping. Follow libaom's four-output multiply/add, two-stage horizontal reduction, packed-store traversal with exact scalar fallback. Generic image resizing is not normative AV1 super-resolution. This adds no track, timing, fragment, animation, or generic ISO BMFF model. |
| `Av1TileReader` loop-restoration unit syntax, `Av1SymbolDecoder` restoration distributions/subexponential codes, and `Av1FrameInfo` unit storage | AV1 section 5.11.57 `read_lr` and `read_lr_unit` syntax | libaom `av1/decoder/decodeframe.c`, `av1/common/restoration.c`, `av1/common/restoration.h`, `av1/common/entropymode.c`, `aom_dsp/binary_codes_reader.c`, and `aom_dsp/recenter.h` at `03087864cf4bea6abb0d28f95cf7843511413d8f` | Decode tile-local switchable/Wiener/self-guided selections, finite reference-subexponential coefficients, chroma Wiener windows, self-guided parameter sets, super-resolution-adjusted unit corners, and the AV1 nearest-unit-count rule into frame-owned per-plane grids. This is compressed still-image syntax and adds no movie, track, timing, fragment, audio, or sequence surface. |
| `Av1TileReader` loop-restoration unit syntax, `Av1SymbolDecoder` restoration distributions/subexponential codes, and `Av1FrameInfo` unit storage | AV1 section 5.11.57 `read_lr` and `read_lr_unit` syntax | libaom `av1/decoder/decodeframe.c`, `av1/common/restoration.c`, `av1/common/restoration.h`, `av1/common/entropymode.c`, `aom_dsp/binary_codes_reader.c`, and `aom_dsp/recenter.h` at `03087864cf4bea6abb0d28f95cf7843511413d8f` | Decode tile-local switchable/Wiener/self-guided selections, finite reference-subexponential coefficients, chroma Wiener windows, self-guided parameter sets, super-resolution-adjusted unit corners, and the AV1 nearest-unit-count rule into frame-owned per-plane grids. This is compressed still-image syntax and adds no movie, track, timing, fragment, audio, or sequence surface. |
@ -392,6 +395,8 @@ This assessment was reconciled with the source tree on 2026-08-29, including pro
- The bounded `Av1Decoder` session parses all tile state before allocating and reconstructing each coded image layer or sequence sample. After successful completion it retains the ungrained reference planes, frame header, frame information, and published entropy snapshot in the refreshed slots, while presentation-only ownership remains separate. A new accepted sequence header resets both parser and retained-owner state. Bounded image-sequence decoding accepts `show_existing_frame`, including its key-frame reference reset and separate film-grain presentation ownership, without exposing a general animation/video reference model.
- The bounded `Av1Decoder` session parses all tile state before allocating and reconstructing each coded image layer or sequence sample. After successful completion it retains the ungrained reference planes, frame header, frame information, and published entropy snapshot in the refreshed slots, while presentation-only ownership remains separate. A new accepted sequence header resets both parser and retained-owner state. Bounded image-sequence decoding accepts `show_existing_frame`, including its key-frame reference reset and separate film-grain presentation ownership, without exposing a general animation/video reference model.
- Committed inter-frame support parses single-reference selection, builds the fixed-capacity spatial and temporal reference-MV stack, decodes NEAREST/NEAR/NEW/GLOBAL and DRL syntax, decodes or infers interpolation filters, checks inter-intra and motion-mode eligibility, and invokes simple translational prediction before residual reconstruction. Commit `8b9aa4b2cfe59ff0f8c348d9bb06678a5ff12f2a` records exact corrected dependent-frame native-plane and final-presentation comparisons plus the complete focused Release matrix and ownership/allocation evidence.
- Committed inter-frame support parses single-reference selection, builds the fixed-capacity spatial and temporal reference-MV stack, decodes NEAREST/NEAR/NEW/GLOBAL and DRL syntax, decodes or infers interpolation filters, checks inter-intra and motion-mode eligibility, and invokes simple translational prediction before residual reconstruction. Commit `8b9aa4b2cfe59ff0f8c348d9bb06678a5ff12f2a` records exact corrected dependent-frame native-plane and final-presentation comparisons plus the complete focused Release matrix and ownership/allocation evidence.
- Commit `e1a764b8f2e8a8db98a003fb3b913213f40084db` owns every compound reference-selection and inter-mode distribution through the retained CDF lifecycle, derives primary and secondary candidate vectors as inseparable pairs, reconstructs both retained references through the existing translational predictor, and combines them through one SIMD-first byte/ushort averaging operator with scalar parity. The pinned 19-frame libavif sequence exercises the complete production block branch and matches pinned libaom native planes and pinned libavif presentation exactly after decoding all preceding reference samples.
- Commit `e1a764b8f2e8a8db98a003fb3b913213f40084db` owns every compound reference-selection and inter-mode distribution through the retained CDF lifecycle, derives primary and secondary candidate vectors as inseparable pairs, reconstructs both retained references through the existing translational predictor, and combines them through one SIMD-first byte/ushort averaging operator with scalar parity. The pinned 19-frame libavif sequence exercises the complete production block branch and matches pinned libaom native planes and pinned libavif presentation exactly after decoding all preceding reference samples.
- Commit `59a4fbad5ed3bc7c34331c4bdc65acc7acde3f04` reconstructs eligible above and left OBMC neighbors through the retained primary reference, exact libaom masks, and the existing SIMD-first masked blender without per-block allocation. Direct production tests cover 8/10/12-bit storage plus 4:2:0 and 4:2:2 plane geometry. A pinned 19-frame sequence contains more than one hundred traced OBMC blocks and passes exact final native-plane, final-presentation, constrained-allocation, normal-dispatch, and scalar-dispatch comparison.
- The locally complete scaled-reference checkpoint maps current-frame Q4 positions into retained-frame Q10 coordinates with pinned-libaom Q14 scale factors and signed rounding, then applies allocation-free variable-phase two-pass convolution across byte and high-bit-depth storage. The production block path selects scaling from actual retained/current dimensions, covers both primary and secondary workspaces plus scaled OBMC neighbors, and retains libaom's 288-sample prediction border. The real layered fixture also exposed and now verifies per-block inter loop-filter reference/mode deltas and skipped-transform edge decisions that the earlier intra-only deblocking integration did not model.
- Source inspection against pinned libaom `03087864cf4bea6abb0d28f95cf7843511413d8f` resolves two disputed audit claims in favor of the current predicates. The interpolation call path uses `is_nontrans_global_motion()`, which returns false only for `TRANSLATION`, so an identity `GLOBALMV` block omits filter symbols. The single-reference spatial extension loops use `MAX_MV_REF_CANDIDATES`, which is two, while the full reference-MV stack capacity is eight. These loops are spatial extension, not temporal extension.
- Source inspection against pinned libaom `03087864cf4bea6abb0d28f95cf7843511413d8f` resolves two disputed audit claims in favor of the current predicates. The interpolation call path uses `is_nontrans_global_motion()`, which returns false only for `TRANSLATION`, so an identity `GLOBALMV` block omits filter symbols. The single-reference spatial extension loops use `MAX_MV_REF_CANDIDATES`, which is two, while the full reference-MV stack capacity is eight. These loops are spatial extension, not temporal extension.
- Every padded AV1 frame plane requests ImageSharp's contiguous allocation contract, and constrained-allocator reconstruction passes without copying. Motion fields use allocator-owned storage and counted leases; allocation tracking passes for initialization, retained aliases, failure unwinding, presentation ownership, decoder-result ownership, and exactly-once disposal. The corrected logical progressive color payload reaches the production inter branch and its final native planes match pinned libaom exactly.
- Every padded AV1 frame plane requests ImageSharp's contiguous allocation contract, and constrained-allocator reconstruction passes without copying. Motion fields use allocator-owned storage and counted leases; allocation tracking passes for initialization, retained aliases, failure unwinding, presentation ownership, decoder-result ownership, and exactly-once disposal. The corrected logical progressive color payload reaches the production inter branch and its final native planes match pinned libaom exactly.
- Transform coefficient entropy derivation and updates now address the above contexts relative to the tile column and the left contexts relative to the current superblock row, preserve luma coordinates independently of chroma subsampling, and test every packed context entry for the libaom any-nonzero rule. Extended vertical partition updates advance the mode-information column rather than the row. The existing multi-superblock 4:4:4 AVIF fixture now completes tile parsing; independent coefficient-context vectors across tile boundaries, chroma layouts, bit depths, and edge-clipped transforms remain required.
- Transform coefficient entropy derivation and updates now address the above contexts relative to the tile column and the left contexts relative to the current superblock row, preserve luma coordinates independently of chroma subsampling, and test every packed context entry for the libaom any-nonzero rule. Extended vertical partition updates advance the mode-information column rather than the row. The existing multi-superblock 4:4:4 AVIF fixture now completes tile parsing; independent coefficient-context vectors across tile boundaries, chroma layouts, bit depths, and edge-clipped transforms remain required.
@ -422,7 +427,8 @@ This assessment was reconciled with the source tree on 2026-08-29, including pro
### Tests
### Tests
- HEVC coverage includes exact native-plane comparison with HM output, exact complete-image comparison with pinned libheif/libde265 references, and the 10 official Sony GENERAL Range Extensions first-picture fixtures across 8/10/12-bit monochrome, 4:2:0, 4:2:2, and 4:4:4 reconstruction. The remaining exposed profiles and individual Range Extensions tools still need exact independent vectors.
- HEVC coverage includes exact native-plane comparison with HM output, exact complete-image comparison with pinned libheif/libde265 references, and the 10 official Sony GENERAL Range Extensions first-picture fixtures across 8/10/12-bit monochrome, 4:2:0, 4:2:2, and 4:4:4 reconstruction. The remaining exposed profiles and individual Range Extensions tools still need exact independent vectors.
- AV1 has focused bitstream, prediction, entropy, reconstruction, filter, film-grain, color, and transform coverage, plus real libavif inputs. A real two-layer libavif-derived OBU stream verifies the bounded frame lifecycle, retained-slot occupancy, resolved inter references, and `frame_size_with_refs` dimensions through a fake tile lifecycle. The corrected progressive color item then verifies its production single-reference inter branch against exact pinned-libaom native planes and pinned-libavif presentation. The pinned 19-frame YUV444 sequence separately reaches production equal-average compound reconstruction after every preceding reference sample and matches its final native and presented references exactly. A real palette stream truncated inside its tile entropy payload verifies libaom-equivalent overflow/trailing-bit rejection and decoder-session recovery. The committed equal-average checkpoint passes 119 direct focused cases plus three `FeatureTestRunner` cases, zero-warning `net10.0` and `net11.0` source builds, a zero-error test-project analyzer build with pre-existing repository warnings, allocator lifetime validation, and `git diff --check`. Four additional pinned sequences reach distance-weighted, both wedge signs, both difference-mask orientations, and smooth and wedge inter-intra reconstruction with exact final native and presented output. Commit `864b11ad9791d3254a38691246270c569001b5a1` records the selectable-compound checkpoint after both source targets, the test-project analyzer build, 25 direct focused cases, six `FeatureTestRunner` cases, constrained allocation, exactly-once tracked returns, and `git diff --check` passed. Valid still-image syntax paths still contain explicit unsupported branches, so the independent AV1 decode matrix is not complete.
- AV1 has focused bitstream, prediction, entropy, reconstruction, filter, film-grain, color, and transform coverage, plus real libavif inputs. A real two-layer libavif-derived OBU stream verifies the bounded frame lifecycle, retained-slot occupancy, resolved inter references, and `frame_size_with_refs` dimensions through a fake tile lifecycle. The corrected progressive color item then verifies its production single-reference inter branch against exact pinned-libaom native planes and pinned-libavif presentation. The pinned 19-frame YUV444 sequence separately reaches production equal-average compound reconstruction after every preceding reference sample and matches its final native and presented references exactly. A real palette stream truncated inside its tile entropy payload verifies libaom-equivalent overflow/trailing-bit rejection and decoder-session recovery. The committed equal-average checkpoint passes 119 direct focused cases plus three `FeatureTestRunner` cases, zero-warning `net10.0` and `net11.0` source builds, a zero-error test-project analyzer build with pre-existing repository warnings, allocator lifetime validation, and `git diff --check`. Four additional pinned sequences reach distance-weighted, both wedge signs, both difference-mask orientations, and smooth and wedge inter-intra reconstruction with exact final native and presented output. Commit `864b11ad9791d3254a38691246270c569001b5a1` records the selectable-compound checkpoint after both source targets, the test-project analyzer build, 25 direct focused cases, six `FeatureTestRunner` cases, constrained allocation, exactly-once tracked returns, and `git diff --check` passed. Commit `59a4fbad5ed3bc7c34331c4bdc65acc7acde3f04` adds exact traced OBMC sequence evidence, subsampled direct reconstruction, constrained allocation, both source builds, the analyzer build, 14 direct cases, the normal/scalar `FeatureTestRunner` comparison, and clean staged `git diff --check`. The local scaled-reference checkpoint adds a genuine size-changing layered AVIF, exact retained-base and final native planes, exact final presentation, active inter deblocking, constrained allocation, normal/scalar dispatch, direct 8/10/12-bit block reconstruction, and 87 passing focused cases. Valid still-image syntax paths still contain explicit unsupported branches, so the independent AV1 decode matrix is not complete.
- Scaled-reference fixture provenance is pinned to libavif `062e582e8afda88e6baf988fdcf046a801efa0f5` and libaom `03087864cf4bea6abb0d28f95cf7843511413d8f`. The source is libavif `tests/data/webp_logo_animated.y4m`, encoded as two layered YUV444 inputs with `avifenc -j 1 -q 90 --layered --scaling-mode:u 1/2 <input> --scaling-mode:u 1/1 <input> <output>`. The resulting item contains a 701-byte 40x40 base layer followed by a 1,494-byte 80x80 dependent layer. SHA-256 values are `EB239F31EC8DBF5E97AD6F52670FCA6497AE2A933822CFE724C75F66AAA2520B` for the AVIF, `B7E30E04A935414A517BAA2DF06AB756DA18BA7C291220D9D7C063297761AE82` for the 2,195-byte logical AV1 payload, `873DC1AB5623910FBF8053CBF684399F4F3BDDBA4110492E3E11DE86E01FEC1B` for the 4,800-byte pinned-libaom base YUV, `964F4D85A79FC10EEB3722E2C9DA3415083E1EB8C2611FE154946FA55E2171ED` for the pinned-libaom final Y4M, and `DC4C6DBE6BD92C5FCE1E3E23700AFA603EF04ED02EDD336213EBBA1E3BD84BA0` for the pinned-libavif final PNG.
- The AV1 transform matrix verifies scalar, `Vector128`, `Vector256`, and `Vector512` forward representations plus the production inverse tiers across every valid size/type combination and supported bit depth. All 511 focused forward and inverse cases pass in Release; `FeatureTestRunner` isolates hardware tiers, every two-dimensional configuration exercises production dispatch, and the complete-block benchmark records zero managed allocation.
- The AV1 transform matrix verifies scalar, `Vector128`, `Vector256`, and `Vector512` forward representations plus the production inverse tiers across every valid size/type combination and supported bit depth. All 511 focused forward and inverse cases pass in Release; `FeatureTestRunner` isolates hardware tiers, every two-dimensional configuration exercises production dispatch, and the complete-block benchmark records zero managed allocation.
- Independent libavif fixtures cover primary, grid, auxiliary-alpha, ICC, metadata-skipping, and all-sync image-sequence presentation. Reference-dependent AV1 and HEVC sequence reconstruction and independent HEVC ICC sequence coverage remain open.
- Independent libavif fixtures cover primary, grid, auxiliary-alpha, ICC, metadata-skipping, and all-sync image-sequence presentation. Reference-dependent AV1 and HEVC sequence reconstruction and independent HEVC ICC sequence coverage remain open.
- Focused decoder-option tests cover strict, ancillary-only, image-data, and metadata-skipping behavior for still items and sequence samples. Complete adversarial dimension, allocation, malformed-container, and resource-limit coverage remains open.
- Focused decoder-option tests cover strict, ancillary-only, image-data, and metadata-skipping behavior for still items and sequence samples. Complete adversarial dimension, allocation, malformed-container, and resource-limit coverage remains open.
@ -570,14 +576,16 @@ Implement and verify in dependency order:
- [x] Decode all compound reference trees and inter modes, derive and retain paired reference-MV candidates, reconstruct both unscaled translational references, and combine them with equal-weight averaging through `Vector512`, `Vector256`, `Vector128`, and scalar paths without per-block allocation.
- [x] Decode all compound reference trees and inter modes, derive and retain paired reference-MV candidates, reconstruct both unscaled translational references, and combine them with equal-weight averaging through `Vector512`, `Vector256`, `Vector128`, and scalar paths without per-block allocation.
- [x] Verify equal-average compound reconstruction with the pinned 19-frame libavif sequence, exact pinned-libaom final native planes, exact pinned-libavif final presentation, direct 8/10/12-bit production-block tests, constrained allocation, and exactly-once motion-field disposal. Both Release source targets pass with zero warnings and errors; the test-project analyzer build passes with zero errors and pre-existing repository warnings; 119 direct focused cases and three `FeatureTestRunner` cases pass without failures or skips; and `git diff --check` is clean.
- [x] Verify equal-average compound reconstruction with the pinned 19-frame libavif sequence, exact pinned-libaom final native planes, exact pinned-libavif final presentation, direct 8/10/12-bit production-block tests, constrained allocation, and exactly-once motion-field disposal. Both Release source targets pass with zero warnings and errors; the test-project analyzer build passes with zero errors and pre-existing repository warnings; 119 direct focused cases and three `FeatureTestRunner` cases pass without failures or skips; and `git diff --check` is clean.
- [x] Decode and reconstruct selected inter-intra prediction and selectable distance-weighted, wedge, and difference-weighted compound blending through reconstructed reference planes. Direct syntax and 8/10/12-bit production tests, SIMD/scalar mask and blend tests, exact four-sequence native/presentation comparisons, constrained contiguous allocation, and exactly-once tracked returns pass. Both source targets build with zero warnings and errors; the test project builds with zero errors and pre-existing repository warnings; 25 direct focused cases and six `FeatureTestRunner` cases pass without failures or skips; and `git diff --check` is clean. Commit `864b11ad9791d3254a38691246270c569001b5a1` records the checkpoint.
- [x] Decode and reconstruct selected inter-intra prediction and selectable distance-weighted, wedge, and difference-weighted compound blending through reconstructed reference planes. Direct syntax and 8/10/12-bit production tests, SIMD/scalar mask and blend tests, exact four-sequence native/presentation comparisons, constrained contiguous allocation, and exactly-once tracked returns pass. Both source targets build with zero warnings and errors; the test project builds with zero errors and pre-existing repository warnings; 25 direct focused cases and six `FeatureTestRunner` cases pass without failures or skips; and `git diff --check` is clean. Commit `864b11ad9791d3254a38691246270c569001b5a1` records the checkpoint.
- [ ] Decode and reconstruct OBMC, scaled references, warped motion, and non-translational global motion through reconstructed reference planes.
- [x] Decode and reconstruct OBMC through above and left neighboring prediction, exact libaom masks, allocator-owned workspaces, and the existing SIMD-first masked blender. Commit `59a4fbad5ed3bc7c34331c4bdc65acc7acde3f04` records exact pinned native/presentation evidence, direct 8/10/12-bit and subsampled reconstruction, constrained allocation, both Release source builds, and normal/scalar dispatch.
- [x] Decode scaled references through exact Q14 scale factors, signed Q4-to-Q10 coordinate rounding, variable per-output phases and steps, regular/smooth/sharp/bilinear reduced and full filters, bit-depth-dependent two-pass rounding, scaled OBMC neighbors, and the normative 288-sample retained border without per-block allocation. The independently generated 40x40-to-80x80 layered fixture proves the base reference before retention and in the production retained session, then matches the final pinned-libaom Y/U/V planes and pinned-libavif RGBA presentation exactly. Active inter deblocking additionally verifies per-block reference/mode deltas and skipped inter/intra boundary decisions. Normal and scalar `FeatureTestRunner` runs, constrained contiguous planes, unique allocation identities, 8/10/12-bit production-block coverage, zero-warning `net10.0` and `net11.0` source builds, the zero-error test-project build with 1,013 pre-existing warnings, 87 focused cases, documentation review, and `git diff --check` pass.
- [ ] **Queued until the scaled-reference commit:** decode warped motion and non-translational global motion through reconstructed reference planes.
- [ ] Verify every remaining connected inter mode and filter with independently encoded bounded AV1 content and exact native-plane comparisons.
- [ ] Verify every remaining connected inter mode and filter with independently encoded bounded AV1 content and exact native-plane comparisons.
- [ ] Lossless and high-bit-depth reconstruction with correct clipping and intermediate precision.
- [ ] Lossless and high-bit-depth reconstruction with correct clipping and intermediate precision.
- [x] Route lossless 4x4 blocks through allocation-free reversible inverse Walsh-Hadamard reconstruction for 8/10/12-bit samples, including the DC-only specialization, `Vector128` production traversal, scalar fallback, exact clipping, and `FeatureTestRunner` parity.
- [x] Route lossless 4x4 blocks through allocation-free reversible inverse Walsh-Hadamard reconstruction for 8/10/12-bit samples, including the DC-only specialization, `Vector128` production traversal, scalar fallback, exact clipping, and `FeatureTestRunner` parity.
- [x] Verify lossless syntax, inverse quantization, prediction, and presented reconstruction with independently encoded 8/10/12-bit AVIF fixtures. The tests require coded residuals with palette and intra-block copy disabled, compare every native YUV sample with the pinned generic libaom-backed decoder, and compare every presented RGBA byte with pinned generic libavif exactly under normal hardware dispatch and the scalar fallback.
- [x] Verify lossless syntax, inverse quantization, prediction, and presented reconstruction with independently encoded 8/10/12-bit AVIF fixtures. The tests require coded residuals with palette and intra-block copy disabled, compare every native YUV sample with the pinned generic libaom-backed decoder, and compare every presented RGBA byte with pinned generic libavif exactly under normal hardware dispatch and the scalar fallback.
- [x] Deblocking loop filter.
- [x] Deblocking loop filter.
- [x] Implement allocation-free SIMD-first 4-, 6-, 8-, and 14-tap filtering for vertical and horizontal edges in 8/10/12-bit storage through closed edge operators, with exact scalar fallback and `FeatureTestRunner` parity against an independent definition.
- [x] Implement allocation-free SIMD-first 4-, 6-, 8-, and 14-tap filtering for vertical and horizontal edges in 8/10/12-bit storage through closed edge operators, with exact scalar fallback and `FeatureTestRunner` parity against an independent definition.
- [x] Verify deblocking syntax, filter-level derivation, and boundary traversal with independently encoded 8/10/12-bit AV1 samples and exact scalar-libaom planes; verify presented reconstruction and public precision with genuine AVIF containers at every supported bit depth.
- [x] Verify deblocking syntax, per-block intra/inter reference and mode delta derivation, skipped-transform boundary decisions on both sides of each edge, and boundary traversal with independently encoded 8/10/12-bit AV1 samples and exact scalar-libaom planes; verify presented reconstruction and public precision with genuine AVIF containers at every supported bit depth.
- [x] CDEF.
- [x] CDEF.
- [x] Replace the scalar helper bucket with an allocation-free SIMD-first `Av1CdefFilter`: vector direction analysis, 4x4/4x8/8x4/8x8 constrained filtering, byte/16-bit output operators, and one exact scalar fallback verified through `FeatureTestRunner`.
- [x] Replace the scalar helper bucket with an allocation-free SIMD-first `Av1CdefFilter`: vector direction analysis, 4x4/4x8/8x4/8x8 constrained filtering, byte/16-bit output operators, and one exact scalar fallback verified through `FeatureTestRunner`.
- [x] Move the immutable deblocked-plane snapshot and frame-wide direction/variance maps to allocator-owned decoder memory, preserving luma-first paired direction derivation, fixed-storage skipped-block selection, asymmetric chroma direction conversion, frame-edge sentinels, SIMD source widening, and direct frame-plane output.
- [x] Move the immutable deblocked-plane snapshot and frame-wide direction/variance maps to allocator-owned decoder memory, preserving luma-first paired direction derivation, fixed-storage skipped-block selection, asymmetric chroma direction conversion, frame-edge sentinels, SIMD source widening, and direct frame-plane output.
@ -810,7 +818,9 @@ The dashboard and immediate execution queue define the remaining critical path.
- [x] Finish the complete focused Release matrix, final source/documentation review, and checkpoint implementation for the simple single-reference inter slice. Commit `8b9aa4b2cfe59ff0f8c348d9bb06678a5ff12f2a` records the corrected real dependent-frame AVIF, exact pinned-libaom native-plane and pinned-libavif presentation comparisons, and 293 focused cases passing with zero failures or skips.
- [x] Finish the complete focused Release matrix, final source/documentation review, and checkpoint implementation for the simple single-reference inter slice. Commit `8b9aa4b2cfe59ff0f8c348d9bb06678a5ff12f2a` records the corrected real dependent-frame AVIF, exact pinned-libaom native-plane and pinned-libavif presentation comparisons, and 293 focused cases passing with zero failures or skips.
- [x] Implement compound reference selection and equal averaging with paired reference-MV derivation, allocation-free SIMD/scalar parity, and exact independent native/presentation evidence through a reference-dependent bounded AVIF sequence. Commit `e1a764b8f2e8a8db98a003fb3b913213f40084db` records the checkpoint.
- [x] Implement compound reference selection and equal averaging with paired reference-MV derivation, allocation-free SIMD/scalar parity, and exact independent native/presentation evidence through a reference-dependent bounded AVIF sequence. Commit `e1a764b8f2e8a8db98a003fb3b913213f40084db` records the checkpoint.
- [x] Implement and independently verify selected inter-intra prediction and selectable distance-weighted, wedge, and difference-weighted compound blending through exact pinned native-plane and presentation comparisons, direct 8/10/12-bit production coverage, constrained allocation, and SIMD/scalar parity.
- [x] Implement and independently verify selected inter-intra prediction and selectable distance-weighted, wedge, and difference-weighted compound blending through exact pinned native-plane and presentation comparisons, direct 8/10/12-bit production coverage, constrained allocation, and SIMD/scalar parity.
- [ ] **Current:** implement OBMC, then continue the remaining Phase 3 inter modes in dependency order: scaled references, warped motion, and non-translational global prediction. Each mode requires independent exact evidence before the next begins.
- [x] Implement and independently verify OBMC through exact traced native-plane and presentation evidence, direct 8/10/12-bit and subsampled production coverage, constrained allocation, and normal/scalar dispatch. Commit `59a4fbad5ed3bc7c34331c4bdc65acc7acde3f04` records the checkpoint.
- [x] Implement and independently verify scaled references through pinned fixed-point oracles, direct 8/10/12-bit production reconstruction, a genuine 40x40-to-80x80 bounded AVIF, exact retained-base/final-native/final-presentation comparisons, active inter deblocking, constrained allocation, and normal/scalar dispatch. The checkpoint is complete locally and awaiting its commit.
- [ ] **Queued until that commit:** implement warped motion, then non-translational global prediction. Each mode requires independent exact evidence before the next begins.
- [ ] Remove every other unsupported valid AV1 still-image syntax path, correct the audited 12-bit inverse-transform arithmetic, and prove the complete AVIF decode matrix with independent inputs and scalar/SIMD parity.
- [ ] Remove every other unsupported valid AV1 still-image syntax path, correct the audited 12-bit inverse-transform arithmetic, and prove the complete AVIF decode matrix with independent inputs and scalar/SIMD parity.
- [ ] Close Phase 4 by completing the remaining HEVC profile and Range Extensions matrix with exact native-plane and presented-image evidence.
- [ ] Close Phase 4 by completing the remaining HEVC profile and Range Extensions matrix with exact native-plane and presented-image evidence.
- [ ] Close Phase 5 and the decode portion of the bounded sequence ledger: color, ICC, alpha, grids, presentation transforms, reference-dependent samples, and complete animated AVIF/HEIC decode.
- [ ] Close Phase 5 and the decode portion of the bounded sequence ledger: color, ICC, alpha, grids, presentation transforms, reference-dependent samples, and complete animated AVIF/HEIC decode.
James Jackson-South
5 days ago
