dataCanceled A sample buffer canceled its data loading operation. Declarationstatic let dataCanceled: NSError See AlsoErrorsallocationFailedalreadyHasDataBufferarrayTooSmallbufferHasNoSampleSizesbufferHasNoSampleTimingInfobufferNotReadycannotSubdividedataFailedinvalidEntryCountinvalidMediaFormatinvalidMediaTypeForOperationinvalidSampleDatainvalidatedrequiredParameterMissingsampleIndexOutOfRange