Function VTCompressionSessionBeginPass

pub unsafe extern "C-unwind" fn VTCompressionSessionBeginPass(
    session: &VTCompressionSession,
    begin_pass_flags: VTCompressionSessionOptionFlags,
    reserved: *mut u32,
) -> i32

Available on crate feature VTCompressionSession only.

Call to announce the start of a specific compression pass.

During multi-pass encoding, this function must be called before VTCompressionSessionEncodeFrame. It is an error to call this function when multi-pass encoding has not been enabled by setting kVTCompressionPropertyKey_MultiPassStorage.

Parameter beginPassFlags: Pass kVTCompressionSessionBeginFinalPass to inform the encoder that the pass must be the final pass.