[Cast] Support shuffle mode

[MGaetan89]

Use case description

Currently (as of version 1.5.1), CastPlayer does not support shuffle mode:

getShuffleModeEnabled():

media/libraries/cast/src/main/java/androidx/media3/cast/CastPlayer.java

Lines 629 to 633 in 76088cd

	@Override
	public boolean getShuffleModeEnabled() {
	// TODO: Support shuffle mode.
	return false;
	}

setShuffleModeEnabled(boolean):

media/libraries/cast/src/main/java/androidx/media3/cast/CastPlayer.java

Lines 624 to 627 in 76088cd

	@Override
	public void setShuffleModeEnabled(boolean shuffleModeEnabled) {
	// TODO: Support shuffle mode.
	}

I didn't find any issue/PR open related to this feature. Is there any blocker to support it?

Alternatives considered

We're currently experimenting with our own simple implementation that looks like (we updated the list of available commands):

override fun getShuffleModeEnabled(): Boolean {
    return false
}

override fun setShuffleModeEnabled(shuffleModeEnabled: Boolean) {
    remoteMediaClient?.queueShuffle(null)
}

But we're not sure if that's the way to go.

[marcbaechinger]

Thanks for your report!

I think the cast API you are suggesting looks correct to me.

We need a way to reflect the shuffled timeline coming from the cast device. After a quick look I think this may just work but we need to test this.

CastPlayer is planned to be reworked by another team. I'll include this report in the requirements that need to be looked at and improved with a new version. I can't give you a timeline for this yet I'm afraid.

[MGaetan89]

CastPlayer is planned to be reworked by another team.

Thanks for the info.

Will this work be done in this repository? Or will it move somewhere else?

[marcbaechinger]

The new version will be a Media3 implementation and will land in this repo. The aim is to stream line the integration with a Media3 media session.

It's unclear yet whether there is a new implementation or whether the existing CastPlayer is changed. We are thinking of a more complete implementation that also aims for an out of the box integration with MediaSession and one of the services.

I am collecting the Cast bugs here in this issue tracker for requirements engineering of the new version and will add this issue to that as well.