o i@sdZddlmZddlZddlmZddlmZddlm Z e diZ de d e fd d Z d ed ed efddZd eded efddZd ed efddZdS)zFInterface for *Pixel Data* encoding, not intended to be used directly.)groupbyN)pack) EncodeRunner) RLELosslessuidreturncCsdS)zeReturn ``True`` if a pixel data encoder for `uid` is available for use, ``False`` otherwise. Tr)rrrT/mnt/sdb/aimis/docanh/lib/python3.10/site-packages/pydicom/pixels/encoders/native.py is_availablesr srcrunnercCs4|dddkr tdt|jd}||j}|dkr!tdt}g}|j}t|jD]'}t t|D]}|||} t || d||} | | | t | q6q.ttd t |} d g} t|dd D] \} }| | | |qj| tdt | d g| R| d d t | t| |S)aWWrapper for use with the encoder interface. Parameters ---------- src : bytes A single frame of little-endian ordered image data to be RLE encoded. runner : pydicom.pixels.encoders.base.EncodeRunner The runner managing the encoding process. Returns ------- bytes An RLE encoded frame. byteorder<>z$Unsupported option "byteorder = '>'"z_Unable to encode as the DICOM standard only allows a maximum of 15 segments in RLE encoded dataNz`. columns : int The number of columns in the image. Returns ------- bytearray The RLE encoded segment, following the format specified by the DICOM Standard. Odd length encoded segments are padded by a trailing ``0x00`` to be even length. rr)rrr#r! _encode_row)r routr,rrr r Ls r c Cspg}|j}|j}g}t|D]}\}}t|}t|dkr$||dq|r[tt|d\}} t|D]} | d9} |d||| | dq3| rY|| d||| dg}tt|d\}} |rp|d|df|| dkr|d| |dfq| dkr|d|dfqtdt|dD]} || | d} |t| d|| qtt|dg|RS) aReturn `src` as RLE encoded bytes. Parameters ---------- src : bytes The little-endian ordered data to be encoded. Returns ------- bytes The RLE encoded row, following the format specified by the DICOM Standard, Part 5, :dcm:`Annex G` Notes ----- * 2-byte repeat runs are always encoded as Replicate Runs rather than only when not preceded by a Literal Run as suggested by the Standard. rNiB)r"r!rlistr#divmodrr) r r5 out_append out_extendliteral_ iter_groupgroup nr_full_runslen_partial_runr,r0_runrrr r4ls>    r4)__doc__ itertoolsrrstructrpydicom.pixels.encoders.baser pydicom.uidrENCODER_DEPENDENCIESstrboolr r%r2intrr r4rrrr s    6