Static kVTDecompressionPropertyKey_UsingHardwareAcceleratedVideoDecoder 

pub unsafe static kVTDecompressionPropertyKey_UsingHardwareAcceleratedVideoDecoder: &'static CFString

Available on crate feature VTDecompressionProperties only.

If set to kCFBooleanTrue, a hardware accelerated video decoder is being used.

You can query this property using VTSessionCopyProperty after you have enabled hardware accelerated decode using kVTVideoDecoderSpecification_EnableHardwareAcceleratedVideoDecoder to see if a hardware accelerated decoder was selected.

See also Apple’s documentation