Crate j2k_transcode 

JPEG-to-HTJ2K coefficient-domain transcode workflow.

Structs

BatchTranscodeReport

Aggregate report for multi-tile transcode.

CpuOnlyDctToWaveletStageAccelerator

Accelerator that always uses the scalar CPU fallback.

Dct97GridScratch

Scratch storage for repeated DCT-grid to 9/7 transform calls.

DctGridError

Error returned when a DCT block grid cannot cover the requested component.

DctGridI16ToHtj2k97CodeBlockBatch

One same-geometry i16 DCT-grid HTJ2K preencode batch.

DctGridI16ToHtj2k97CodeBlockJob

Direct dequantized i16 DCT-grid to one-level 9/7 HTJ2K code-block job.

DctGridToDwt53Job

Direct DCT-grid to one-level 5/3 projection job.

DctGridToDwt97Job

Direct DCT-grid to one-level 9/7 transform job.

DctGridToHtj2k97CodeBlockJob

Direct DCT-grid to prequantized one-level 9/7 HTJ2K code-block job.

DctGridToReversibleDwt53Job

Direct DCT-grid to one-level reversible integer 5/3 projection job.

DctToWaveletStageCounters

Shared offered/handled counters for DCT-to-wavelet stage accelerators.

Dwt53TwoDimensional

One separable single-level 2D 5/3 transform result.

Dwt97BatchStageTimings

Backend-specific timing breakdown for a same-geometry 9/7 batch.

Dwt97TwoDimensional

One separable single-level 2D 9/7 transform result.

EncodedHtJ2kCodeBlock

Adapter encoded HTJ2K cleanup/refinement code-block payload for backend experimentation.

EncodedTranscode

Encoded transcode output and validation/report metadata.

EncodedTranscodeBatch

Batch transcode output. Tile-level parse/encode failures are preserved so a WSI ingest queue can continue past isolated bad tiles.

Htj2k97CodeBlockOptions

Encode parameters needed to quantize 9/7 output directly into HTJ2K code-block coefficient layout.

Htj2kEncodeError

Opaque, transcode-owned source for a native HTJ2K encode failure.

IrreversibleQuantizationSubbandScales

Multipliers applied to irreversible 9/7 quantization step sizes by subband.

JpegTileBatchInput

One JPEG tile input for batch transcode.

JpegToHtj2kEncodeOptions

HTJ2K encode options used after JPEG coefficient-domain wavelet bands are produced.

JpegToHtj2kOptions

Options for the experimental JPEG-to-HTJ2K path.

JpegToHtj2kTranscoder

Reusable experimental JPEG-to-HTJ2K transcoder state.

PreencodedHtj2k97CodeBlock

One preencoded HTJ2K code-block.

PreencodedHtj2k97CompactBatch

Compact preencoded HTJ2K components backed by one payload buffer.

PreencodedHtj2k97CompactBatchGroups

Compact preencoded HTJ2K grouped-batch output backed by one payload buffer.

PreencodedHtj2k97CompactCodeBlock

One compact preencoded HTJ2K code-block.

PreencodedHtj2k97CompactComponent

Preencoded compact irreversible 9/7 HTJ2K component.

PreencodedHtj2k97CompactImage

Preencoded irreversible 9/7 HTJ2K code-block image backed by one compact payload buffer.

PreencodedHtj2k97CompactResolution

One component resolution’s compact preencoded HTJ2K subbands.

PreencodedHtj2k97CompactSubband

One compact preencoded HTJ2K subband split into code-blocks.

PreencodedHtj2k97Component

Preencoded irreversible 9/7 HTJ2K component.

PreencodedHtj2k97Resolution

One component resolution’s preencoded HTJ2K subbands.

PreencodedHtj2k97Subband

One preencoded HTJ2K subband split into code-blocks.

PrequantizedHtj2k97CodeBlock

One prequantized HTJ2K code-block.

PrequantizedHtj2k97Component

Prequantized irreversible 9/7 HTJ2K component.

PrequantizedHtj2k97Image

Prequantized irreversible 9/7 HTJ2K code-block image.

PrequantizedHtj2k97Resolution

One component resolution’s prequantized HTJ2K subbands.

PrequantizedHtj2k97Subband

One prequantized HTJ2K subband split into code-blocks.

RayonReversibleDwt53Accelerator

CPU/Rayon accelerator for the exact reversible integer 5/3 first level.

ResidentBufferRef

Borrowed, backend-visible memory range with a caller-owned lifetime.

ResidentCodestreamBuffer

Resident codestream buffer descriptor.

ResidentComponentGeometry

Per-component geometry shared by resident handoff descriptors.

ResidentDctGridLayout

Layout metadata for a resident JPEG DCT-grid descriptor.

ResidentDwtSubband

Resident projected DWT subband descriptor.

ResidentDwtSubbandLayout

Layout metadata for a resident DWT subband descriptor.

ResidentJpegDctGrid

Resident JPEG DCT coefficient grid descriptor.

ResidentSampleInfo

Sample precision metadata for resident handoff buffers.

ResidentSampling

Component sampling factors preserved through JPEG-to-HTJ2K transcode.

ReversibleDwt53FirstLevel

One separable single-level reversible integer 5/3 transform result.

TranscodeBatchProfileRow

Shared transcode batch profile row fields.

TranscodeComponentReport

Per-component transcode geometry preserved in the generated codestream.

TranscodePipelineMap

Stage-by-stage transcode residency map derived from existing timings.

TranscodePipelineStageReport

One stage in a transcode pipeline residency map.

TranscodeReport

Transcode summary for validation and benchmarking.

TranscodeResidentStageRecommendation

Recommended next stage to evaluate for Metal residency.

TranscodeTimingReport

Detailed timing and dispatch counters for JPEG-to-HTJ2K transcode.

Enums

DctToWaveletStageCounterEvent

Counter row recorded by DCT-to-wavelet stage accelerators.

DctTransformError

Error returned when a DCT-grid transform cannot be executed safely.

EncodeProgressionOrder

Supported JPEG 2000 progression orders for the lossless encode facade.

Htj2k97CodeBlockAxis

Code-block dimension whose exponent failed validation.

Htj2k97CodeBlockOptionsError

Failure returned when shared HTJ2K 9/7 code-block options are unsupported.

Htj2kEncodeErrorKind

Machine-readable class for a native HTJ2K encode failure.

J2kSubBandType

Adapter classic J2K sub-band kind for backend experimentation.

JpegToHtj2kCoefficientPath

Experimental production path used to generate HTJ2K wavelet coefficients.

JpegToHtj2kError

Error returned by the experimental transcode path.

ResidentColorModel

Color interpretation carried by a resident transcode handoff buffer.

ResidentDctCoefficientOrder

Coefficient ordering used by a resident JPEG DCT-grid buffer.

ResidentDwtSubbandKind

Wavelet subband represented by a resident DWT buffer.

ResidentHandoffError

Error returned by resident transcode handoff descriptor constructors.

TranscodeBatchProfileRequest

Stable profile request label for transcode batch telemetry.

TranscodePipelineStageKind

Logical stages in the JPEG-to-J2K/HTJ2K transcode pipeline.

TranscodeStageDispatchMode

Dispatch policy for optional transcode-stage accelerators.

TranscodeStageError

Error returned by accelerated transcode stage backends.

TranscodeStageProcessor

Observed residency for a transcode stage.

TranscodeValidationClassification

Classification for optional coefficient-validation metrics.

Constants

JPEG_TO_HTJ2K_LOSSY_97_QUANTIZATION_SCALE

Default irreversible quantization multiplier for JPEG direct 9/7 HTJ2K.

Traits

DctToWaveletStageAccelerator

Optional backend for SIMD, GPU, or other accelerated transform stages.

Functions

dct8x8_blocks_then_dwt53_float

Reference path for a DCT block grid: DCT coefficients -> float IDCT samples -> separable linearized 5/3.

dct8x8_blocks_then_dwt97_float

Reference path for a DCT block grid: DCT coefficients -> float IDCT samples -> separable linearized 9/7.

dct8x8_blocks_then_dwt97_float_with_scratch

Reference 9/7 path with caller-owned spatial-sample scratch: DCT coefficients -> float IDCT samples -> separable linearized 9/7.

dct8x8_blocks_to_dwt53_float_linear

Map an adjacent 8x8 DCT block grid directly into a linearized one-level 2D 5/3 result for the logical component dimensions.

htj2k97_subband_delta

Deadzone quantization step size Δ for a subband.

htj2k97_subband_total_bitplanes

Total declared bitplanes for every code-block in a subband.

jpeg_to_htj2k

Transcode a constrained baseline grayscale JPEG tile into an HTJ2K codestream using direct DCT-domain wavelet coefficients.

jpeg_to_htj2k_batch

Transcode many JPEG tiles into HTJ2K codestreams.

validate_htj2k97_codeblock_options

Validate 9/7 code-block options against the numeric limits both GPU backends must agree on, returning the decoded (cb_width, cb_height).

Type Aliases

TranscodeValidationMetrics

Error metrics from an optional validation oracle.