[Rutujakirad]

Summary

• Adds a new feature definition for OfflineAudioContext incremental rendering (startRendering(chunkSize) and close()).
• Keeps the existing Baseline-high offline-audio-context feature unchanged.
• Omits compat_features for now because no BCD keys exist yet.

Fixes #4473

[ddbeck]

See #4473 (comment) for some discussion related to this. @Rutujakirad are you connected to the implementation of this feature (or its specification) in some way? If you're in a position to review the issue comment, then great. Otherwise, we should give the original reporter a few days to respond before starting in on reviewing this PR. Thanks for your understanding.

[Rutujakirad]

Hi @ddbeck
Thanks for the context! I'm not directly involved in the implementation or specification. My PR adds a feature definition to the WebDX catalog based on the Web Audio API specification. I'll review the linked discussion, and I'm happy to wait for the original reporter's input before the review proceeds.

[ddbeck]

Drawing on #4473 (comment):

Suggested change

	description: The optional `chunkSize` argument of `OfflineAudioContext.startRendering()` returns an `AudioBuffer` of at most that many sample frames, so you can render long or unbounded audio graphs incrementally. The `close()` method stops rendering.
	description: >
	The `startRendering()` method of the `OfflineAudioContext` API accepts an optional chunk size argument, which sets the number of sample frames to render in a `AudioBuffer`.
	You can use this to process audio incrementally, reducing the memory required to process high amounts of data.

[Rutujakirad]

Hi @ddbeck

Thanks for reviewing and suggesting the change! I've updated the description accordingly. Could you please take another look and Let me know if it looks good
Thank you!