Struct NullBackend 

pub struct NullBackend {
    state: PlayerState,
    volume: f32,
    position: f64,
    duration: Option<f64>,
    audio_settings: AudioSettings,
}

Null player backend (for testing or when no real player is available)

@req: DR-004 - PlayerBackend trait (mock implementation for testing)

Fields

state: PlayerState

volume: f32

position: f64

duration: Option<f64>

audio_settings: AudioSettings

Implementations

impl NullBackend

pub fn new() -> Self

Trait Implementations

impl Default for NullBackend

fn default() -> Self

Returns the “default value” for a type.

impl PlayerBackend for NullBackend

fn load(&mut self, media: &MediaItem) -> Result<(), PlayerError>

Load a media item for playback TRACES: UR-005

fn play(&mut self) -> Result<(), PlayerError>

Start or resume playback TRACES: UR-005

fn pause(&mut self) -> Result<(), PlayerError>

Pause playback TRACES: UR-005

fn stop(&mut self) -> Result<(), PlayerError>

Stop playback and unload media TRACES: UR-005

fn seek(&mut self, position: f64) -> Result<(), PlayerError>

Seek to a position in seconds TRACES: UR-005

fn set_volume(&mut self, volume: f32) -> Result<(), PlayerError>

Set volume (0.0 - 1.0) TRACES: UR-016

fn position(&self) -> f64

Get current playback position in seconds

fn duration(&self) -> Option<f64>

Get total duration in seconds

fn state(&self) -> PlayerState

Get current player state

fn volume(&self) -> f32

Get current volume

fn set_audio_settings( &mut self, settings: &AudioSettings, ) -> Result<(), PlayerError>

Apply audio settings (crossfade, gapless, normalization)

fn audio_settings(&self) -> AudioSettings

Get current audio settings

fn set_audio_track(&mut self, _stream_index: i32) -> Result<(), PlayerError>

Set the active audio track by stream index

fn set_subtitle_track( &mut self, _stream_index: Option<i32>, ) -> Result<(), PlayerError>

Set the active subtitle track by stream index (None to disable subtitles)