This is equivalent to the requirement that once a new element is added, all elements that were added before have to be removed before the new element can be removed. In a FIFO data structure, the first element added to the queue will be the first one to be removed. The operations of a queue make it a first-in-first-out (FIFO) data structure. Other operations may also be allowed, often including a peek or front operation that returns the value of the next element to be dequeued without dequeuing it. The operation of adding an element to the rear of the queue is known as enqueue, and the operation of removing an element from the front is known as dequeue. By convention, the end of the sequence at which elements are added is called the back, tail, or rear of the queue, and the end at which elements are removed is called the head or front of the queue, analogously to the words used when people line up to wait for goods or services. In computer science, a queue is a collection of entities that are maintained in a sequence and can be modified by the addition of entities at one end of the sequence and the removal of entities from the other end of the sequence. It's a lot of fun when the app has basic functionality for managing the queue.Representation of a FIFO (first in, first out) queue While a song is playing I get inspired and want to queue a few different things then go and adjust the order. Same thing with managing the queue on the fly with individual tracks. If I get a few songs into Who's Next and want to continue with the rest of the Fleetwood Mac album I just delete the block of remaining Who's Next tracks from the queue and things flow on from there. When the current song on the Fleetwood Mac album finishes then Who's Next starts playing. If I put on a Fleetwood Mac album and decide I'd like to listen to Who's Next, I should be able to go to Who's Next, choose "play next" and that's it. I listen to a wide variety of music, and many genres other than pop music top 40 are album based. That should be a central and robust element of any playback software. The big advantage to playing back music streamed from local files or the internet is the enjoyable flexibility in queueing up albums and tracks and changing the queue as you go. The WiiM Home app queue is so frustrating that I barely ever use it, severely limiting how I can use the WiiM Amp.Ĭlick to expand.Yes, compared to even ancient music playback clients, it's very limited and frustrating. Making and adjusting the play queue is the heart of listening to music. In Roon you can at least delete and re-order tracks in the queue. All of this basic functionality is more than a decade old. You could add playlists or albums to play after the track you are listening to. You could delete and move individual tracks. In the iTunes of more than a decade ago you could collapse the queue into albums and re-order them. It just treats everything as an individual track, which is useless. If I want to add several tracks while a song is playing, I have to add them to "Play next" in reverse order to get them in sequence.Ĥ. I want the current song to keep playing and then play Album C and then continue with the rest of the queue.Ģ. If I have queued Album A and B, and while listening to Album A I decide I would like to listen to Album C, I cannot queue Album C to play next, it can only be added at the end of the existing queue. I can only add the album to the end of the queue. I cannot add an album or playlist from Qobuz to play next. The music queue in the WiiM Home app is barely usable.ġ.
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