vout: apple: Add Picture in Picture

This adds a new module to handle picture in picture on iOS and tvOS.

Picture in picture is only enabled if the drawable ns-object conforms to the new VLCPictureInPictureDrawable protocol.

VLCPictureInPictureDrawable protocol provide new apis to start/stop picture in picture and various callbacks to handle user interactions from the picture in picture window's overlay.

Implementing VLCPictureInPictureDrawable.pictureInPictureReady block is mandatory to be notified once picture in picture initialization is done.

This block will pass a id<VLCPictureInPictureWindowControlling> object allowing to start and stop picture in picture.

It will also provide a way to invalidate the state of the playback by calling invalidatePlaybackState, forcing the picture in picture to fetch new media infos like current time or media length from the VLCPictureInPictureDrawable.mediaController.

This module uses Apple public APIs hence it won't work for macOS at this time. Separate work will have to be done in order to provide support for picture in picture private APIs and allow the use of picture in picture on macOS with libvlc.

Needs !6056 (merged) to have proper playback progress in Picture in Picture window overlay.

assigned to @umxprime

I find the lack of license header/SPDX disturbing :) also headers should probably have the traditional

#ifndef VLC_FOO_H
#define VLC_FOO_H
[...]
#endif

added MRStatus::NotCompliant label

changed milestone to %4.0

added Component::Video: macOS / iOS / tvOS / visionOS Platform::appleOS labels

Adding a module capability feels over-engineered if there is only one possible back-end.

added 3 commits

• 08d29df5...44486475 - 2 commits from branch videolan:master
• dd15af75 - vout: apple: Add Picture in Picture

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changed the description

resolved all threads

added 9 commits

• dd15af75...55e0779f - 8 commits from branch videolan:master
• abdfe084 - vout: apple: Add Picture in Picture

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changed the description

mentioned in merge request !4372 (closed)

added MRStatus::Acceptable label and removed MRStatus::NotCompliant label

added 1 commit

• 00c41b9a - vout: apple: Add Picture in Picture

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added MRStatus::Accepted label and removed MRStatus::Acceptable label

MR Acceptance result

This MergeRequest has been Accepted! Congratulations.

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added 39 commits

• 00c41b9a...5c1a7d22 - 38 commits from branch videolan:master
• b8a97c62 - vout: apple: Add Picture in Picture

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enabled an automatic merge when the pipeline for b8a97c62 succeeds

merged

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