Struct DownloadQueue 

pub struct DownloadQueue { /* private fields */ }

Persistent download queue — lives for the app’s lifetime.

Follows the playlist rather than being told about it: whenever the set of entries waiting for a file changes, each is queued or joins the transfer already running for its track, and anything no longer in the playlist is let go. A front end adds tracks to the player and nothing else, so there is no second request to race the first and no queue of entries the player has already discarded.

What is in flight, and who waits on it, is the player’s download store. This decides only what is fetched when.

Downloads run on a pool of worker threads. Cursor changes reorder the queue so the current track downloads first, followed by same-album tracks for gapless playback; those jump the queue through a permit-limited priority lane rather than by spawning unbounded threads.

Implementations

impl DownloadQueue

pub fn spawn( cmd_tx: Sender<PlayerCommand>, state: Arc<SharedPlayerState>, ) -> Self

Spawn the download queue and the thread that keeps it following the playlist. Workers start with the first thing to fetch.

pub fn cache(&self, track_ids: Vec<i64>)

Fetch these tracks into the cache, with no queue entry to play them. They go behind everything the playlist is waiting on.

Trait Implementations

impl Clone for DownloadQueue

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.