Struct Loader 

pub struct Loader { /* private fields */ }

A loaded oneVPL implementation library plus its resolved Stage 1 entry points.

Owns the libloading::Library (kept mapped for as long as any Session built from it is alive — every fn pointer field is only ever called through &self/&Session methods, never after both are dropped).

Implementations

impl Loader

pub fn open() -> Result<Self, VplError>

Open the first working implementation library: ONEVPL_SEARCH_PATH (if set, a single directory) is tried first for each candidate name, then each candidate’s bare name (OS default search order). Returns VplError::NotFound if nothing loads, or VplError::MissingSymbol if a candidate loads but is missing one of this crate’s required entry points (wrong/incompatible DLL).

Errors

See variants above.

pub fn create_session(self, impl_hint: mfxIMPL) -> Result<Session, VplError>

MFXInitEx — create a session against impl_hint (typically crate::consts::MFX_IMPL_HARDWARE). Consumes self: a Session owns its Loader for the rest of its lifetime (every later call resolves through the same loaded library).

Errors

VplError::Status when MFXInitEx returns a negative mfxStatus.