Struct PlaybackTimeline 

pub struct PlaybackTimeline {
    pub samples_played: Arc<AtomicU64>,
    /* private fields */
}

Shared timeline that the decode thread writes and the UI reads. The decode thread appends boundaries; the UI reads them + samples_played to derive current track and position.

Fields

samples_played: Arc<AtomicU64>

Total interleaved samples consumed (played) by the audio engine. Written by CoreAudio render callback, read by UI.

Implementations

impl PlaybackTimeline

pub fn new() -> Arc<Self>

pub fn reset(&self)

Reset for a new playback session.

pub fn samples_played_counter(&self) -> Arc<AtomicU64>

Get a clone of the samples_played Arc for the audio engine.

pub fn current_playback( &self, ) -> Option<(QueueItemId, PathBuf, StreamInfo, u64)>

Derive current track info and position from the playback head. Called by the UI on every tick. Returns (id, path, stream_info, position_ms).

Acquires the boundaries read lock BEFORE reading samples_played so channels/sample_rate/boundaries are all from a consistent snapshot. Without this ordering, a track transition could update the atomics after we read samples_played but before we read the boundary list.