Playback

device.playback sends playback commands to the app that plays now. They go out as Media Remote commands over AirPlay, on both devices.

await tv.playback.pause();
await tv.playback.play();
await tv.playback.skipForward(30);
await tv.playback.seek(90);
await tv.playback.setShuffle('songs');
await tv.playback.setRepeat('one');

Method	Meaning
play(), pause(), togglePlayPause(), stop()	Transport
next(), previous()	Next or previous item
skipForward(seconds = 15), skipBackward(seconds = 15)	Skip by an interval
seek(seconds)	Jump to a position from the start
setRepeat(mode)	off, one or all
setShuffle(mode)	off, albums or songs
setRate(rate)	Playback speed; 1 is normal

Every method throws UnavailableError while AirPlay is down. When the app refuses a command, the method rejects with a CommandRefusedError. Its reason is the send error in lower camel case, such as applicationNotFound, and its status the handler status, such as noActionableNowPlayingItem.

import { CommandRefusedError } from '@corewire/devices';

try {
    await tv.playback.next();
} catch (err) {
    if (err instanceof CommandRefusedError) {
        console.log('refused', err.reason, err.status);
    }
}

What the app accepts

Apps differ. A live stream cannot seek, and a podcast app may not shuffle. nowPlaying.supports(command) asks the app that plays now:

if (tv.nowPlaying.supports('seek')) {
    await tv.playback.seek(0);
}

The commands are play, pause, togglePlayPause, stop, next, previous, skipForward, skipBackward, seek, repeat, shuffle and rate. Without an app the answer is false.

Playback or remote keys

playback.pause() tells the app to pause. remote.press('pause') sends the pause key, as a physical remote would, and the system decides what happens. Use playback for media and remote to navigate the interface. See Remote and touch.