MFAverageTimePerFrameToFrameRate

// MFPlat.dll
#include <windows.h>

HRESULT MFAverageTimePerFrameToFrameRate(
    ULONGLONG unAverageTimePerFrame,
    DWORD* punNumerator,
    DWORD* punDenominator
);

<DllImport("MFPlat.dll", ExactSpelling:=True)>
Public Shared Function MFAverageTimePerFrameToFrameRate(
    unAverageTimePerFrame As ULong,   ' ULONGLONG
    <Out> ByRef punNumerator As UInteger,   ' DWORD* out
    <Out> ByRef punDenominator As UInteger   ' DWORD* out
) As Integer
End Function

' unAverageTimePerFrame : ULONGLONG
' punNumerator : DWORD* out
' punDenominator : DWORD* out
Declare PtrSafe Function MFAverageTimePerFrameToFrameRate Lib "mfplat" ( _
    ByVal unAverageTimePerFrame As LongLong, _
    ByRef punNumerator As Long, _
    ByRef punDenominator As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

MFAverageTimePerFrameToFrameRate = ctypes.windll.mfplat.MFAverageTimePerFrameToFrameRate
MFAverageTimePerFrameToFrameRate.restype = ctypes.c_int
MFAverageTimePerFrameToFrameRate.argtypes = [
    ctypes.c_ulonglong,  # unAverageTimePerFrame : ULONGLONG
    ctypes.POINTER(wintypes.DWORD),  # punNumerator : DWORD* out
    ctypes.POINTER(wintypes.DWORD),  # punDenominator : DWORD* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('MFPlat.dll')
MFAverageTimePerFrameToFrameRate = Fiddle::Function.new(
  lib['MFAverageTimePerFrameToFrameRate'],
  [
    -Fiddle::TYPE_LONG_LONG,  # unAverageTimePerFrame : ULONGLONG
    Fiddle::TYPE_VOIDP,  # punNumerator : DWORD* out
    Fiddle::TYPE_VOIDP,  # punDenominator : DWORD* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "mfplat")]
extern "system" {
    fn MFAverageTimePerFrameToFrameRate(
        unAverageTimePerFrame: u64,  // ULONGLONG
        punNumerator: *mut u32,  // DWORD* out
        punDenominator: *mut u32  // DWORD* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("MFPlat.dll")]
public static extern int MFAverageTimePerFrameToFrameRate(ulong unAverageTimePerFrame, out uint punNumerator, out uint punDenominator);
"@
$api = Add-Type -MemberDefinition $sig -Name 'MFPlat_MFAverageTimePerFrameToFrameRate' -Namespace Win32 -PassThru
# $api::MFAverageTimePerFrameToFrameRate(unAverageTimePerFrame, punNumerator, punDenominator)

#uselib "MFPlat.dll"
#func global MFAverageTimePerFrameToFrameRate "MFAverageTimePerFrameToFrameRate" sptr, sptr, sptr
; MFAverageTimePerFrameToFrameRate unAverageTimePerFrame, varptr(punNumerator), varptr(punDenominator)   ; 戻り値は stat
; unAverageTimePerFrame : ULONGLONG -> "sptr"
; punNumerator : DWORD* out -> "sptr"
; punDenominator : DWORD* out -> "sptr"
; ※HSP3.7は int64 引数(64bit値渡し)に非対応です。
; ※HSP3.7は #func のため戻り値はシステム変数 stat に格納されます。

#uselib "MFPlat.dll"
#cfunc global MFAverageTimePerFrameToFrameRate "MFAverageTimePerFrameToFrameRate" int64, var, var
; res = MFAverageTimePerFrameToFrameRate(unAverageTimePerFrame, punNumerator, punDenominator)
; unAverageTimePerFrame : ULONGLONG -> "int64"
; punNumerator : DWORD* out -> "var"
; punDenominator : DWORD* out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。
; ※int64 引数の DLL 値渡しは x64 ランタイム(hsp3_64)のみ対応(x86 は未対応)。

; HRESULT MFAverageTimePerFrameToFrameRate(ULONGLONG unAverageTimePerFrame, DWORD* punNumerator, DWORD* punDenominator)
#uselib "MFPlat.dll"
#cfunc global MFAverageTimePerFrameToFrameRate "MFAverageTimePerFrameToFrameRate" int64, var, var
; res = MFAverageTimePerFrameToFrameRate(unAverageTimePerFrame, punNumerator, punDenominator)
; unAverageTimePerFrame : ULONGLONG -> "int64"
; punNumerator : DWORD* out -> "var"
; punDenominator : DWORD* out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	mfplat = windows.NewLazySystemDLL("MFPlat.dll")
	procMFAverageTimePerFrameToFrameRate = mfplat.NewProc("MFAverageTimePerFrameToFrameRate")
)

// unAverageTimePerFrame (ULONGLONG), punNumerator (DWORD* out), punDenominator (DWORD* out)
r1, _, err := procMFAverageTimePerFrameToFrameRate.Call(
	uintptr(unAverageTimePerFrame),
	uintptr(punNumerator),
	uintptr(punDenominator),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function MFAverageTimePerFrameToFrameRate(
  unAverageTimePerFrame: UInt64;   // ULONGLONG
  punNumerator: Pointer;   // DWORD* out
  punDenominator: Pointer   // DWORD* out
): Integer; stdcall;
  external 'MFPlat.dll' name 'MFAverageTimePerFrameToFrameRate';

result := DllCall("MFPlat\MFAverageTimePerFrameToFrameRate"
    , "Int64", unAverageTimePerFrame   ; ULONGLONG
    , "Ptr", punNumerator   ; DWORD* out
    , "Ptr", punDenominator   ; DWORD* out
    , "Int")   ; return: HRESULT

●MFAverageTimePerFrameToFrameRate(unAverageTimePerFrame, punNumerator, punDenominator) = DLL("MFPlat.dll", "int MFAverageTimePerFrameToFrameRate(qword, void*, void*)")
# 呼び出し: MFAverageTimePerFrameToFrameRate(unAverageTimePerFrame, punNumerator, punDenominator)
# unAverageTimePerFrame : ULONGLONG -> "qword"
# punNumerator : DWORD* out -> "void*"
# punDenominator : DWORD* out -> "void*"
# なでしこ1は32bit・ANSI(Shift_JIS)。文字列=char*(ANSI)、ポインタ/ハンドル=void*(4byte)。