Imagecodecs support

[maxrjones]

related to zarr-developers/zarr-extensions#15

[d-v-b]

POC demo in Zarr Python:

zarr-developers/zarr-python#3276

First real PR against zarr python:

zarr-developers/zarr-python#3318

[d-v-b]

issue in which I outline the plan:

zarr-developers/zarr-python#3162

[abarciauskas-bgse]

@d-v-b is this issue still considered "in-review"?

[maxrjones]

@d-v-b is this issue still considered "in-review"?

(answering for Davis since he's on another project now)

@abarciauskas-bgse there's been a lot of work done towards improved codec handling:

• add numcodec protocol zarr-developers/zarr-python#3318
• chore/handle numcodecs codecs zarr-developers/zarr-python#3376
• fix invalid blosc defaults zarr-developers/zarr-python#3545
• fix/simpler blosc tuning zarr-developers/zarr-python#3553
• chore/hollow out zarr3 zarr-developers/numcodecs#780 (in review)
• Add v2 and v3 metadata support to codecs zarr-developers/zarr-python#3332 (in review)

zarr-developers/zarr-python#3332 is the successor to the POC PR linked earlier (zarr-developers/zarr-python#3276) and is on a similar scale to the dtypes refactor, so I'm guessing it'll take another month or so to review.

On supporting imagecodecs specifically, I have a draft PR that I need to update (zarr-developers/zarr-extensions#16) but probably won't have time for another couple weeks at least.

What does "ongoing" mean for a task status relative to "in progress"? Maybe we should change this task to "ongoing" to reflect that a lot of progress has been made but the acceptance criteria hasn't yet been met and it's not currently being worked on under this project?

[abarciauskas-bgse]

@maxrjones thanks for the updates. I believe I added the ongoing category to handle situations like this: there is an issue which we plan to continue working and tracking but is not actively being worked on or reviewed. I have moved it to the ongoing category and out of any specific sprint. If you plan to work on it later in the PI I suggest assigning it to a later sprint or the flex week sprint.