Repeat modes

[defagos]

As a user I want some playback experiences to provide me with repeat modes:

• Repeat one: When enabled, repeats the current content in a playlist.
• Repeat all: When enabled, repeats the whole playlist at the end.

Acceptance criteria

• An API is available to set the repeat mode (can be none).
• A repeat mode toggle button (none, one, all) has been added to the playlist demo.
• Advancing to the next item wraps around the playlist in repeat all mode (but not the other way around).
• Advancing to the next / returning to the previous item in repeat one mode moves to the next / previous item (and not to the next loop).
• In all repeat modes the playback experience is gapless.

Hints

Maybe AVPlayerLooper might be helpful (maybe not).

Tasks

• [ ] Check with AVQueuePlayer and AVPlayerLooper how repeat modes interact with actionAtItemEnd so that we can better understand how our implementation should behave.
• [ ] Add repeat modes.
• [ ] Update the playlist demo.
• [ ] Update advance to next APIs to wrap around the playlist at its end.
• [ ] Make sure each individual loop is a separate comScore analytics session.
• [ ] Check network activity (e.g. preload of next stored item).