ホーム › Media.MediaFoundation › MFCreatePresentationClock

MFCreatePresentationClock

関数

メディア再生の同期に使うプレゼンテーションクロックを生成する。

DLLMF.dll呼出規約winapi対応OSWindows Vista 以降

シグネチャ

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

HRESULT MFCreatePresentationClock(
    IMFPresentationClock** ppPresentationClock
);

パラメーター

名前	型	方向	説明
ppPresentationClock	IMFPresentationClock**	out	生成されたプレゼンテーションクロックIMFPresentationClockを受け取るポインター。

戻り値の型: HRESULT

各言語での呼び出し定義

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

HRESULT MFCreatePresentationClock(
    IMFPresentationClock** ppPresentationClock
);

[DllImport("MF.dll", ExactSpelling = true)]
static extern int MFCreatePresentationClock(
    IntPtr ppPresentationClock   // IMFPresentationClock** out
);

<DllImport("MF.dll", ExactSpelling:=True)>
Public Shared Function MFCreatePresentationClock(
    ppPresentationClock As IntPtr   ' IMFPresentationClock** out
) As Integer
End Function

' ppPresentationClock : IMFPresentationClock** out
Declare PtrSafe Function MFCreatePresentationClock Lib "mf" ( _
    ByVal ppPresentationClock As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

MFCreatePresentationClock = ctypes.windll.mf.MFCreatePresentationClock
MFCreatePresentationClock.restype = ctypes.c_int
MFCreatePresentationClock.argtypes = [
    ctypes.c_void_p,  # ppPresentationClock : IMFPresentationClock** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('MF.dll')
MFCreatePresentationClock = Fiddle::Function.new(
  lib['MFCreatePresentationClock'],
  [
    Fiddle::TYPE_VOIDP,  # ppPresentationClock : IMFPresentationClock** out
  ],
  Fiddle::TYPE_INT)

#[link(name = "mf")]
extern "system" {
    fn MFCreatePresentationClock(
        ppPresentationClock: *mut *mut core::ffi::c_void  // IMFPresentationClock** out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("MF.dll")]
public static extern int MFCreatePresentationClock(IntPtr ppPresentationClock);
"@
$api = Add-Type -MemberDefinition $sig -Name 'MF_MFCreatePresentationClock' -Namespace Win32 -PassThru
# $api::MFCreatePresentationClock(ppPresentationClock)

#uselib "MF.dll"
#func global MFCreatePresentationClock "MFCreatePresentationClock" sptr
; MFCreatePresentationClock ppPresentationClock   ; 戻り値は stat
; ppPresentationClock : IMFPresentationClock** out -> "sptr"
; ※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 "MF.dll"
#cfunc global MFCreatePresentationClock "MFCreatePresentationClock" sptr
; res = MFCreatePresentationClock(ppPresentationClock)
; ppPresentationClock : IMFPresentationClock** out -> "sptr"

; HRESULT MFCreatePresentationClock(IMFPresentationClock** ppPresentationClock)
#uselib "MF.dll"
#cfunc global MFCreatePresentationClock "MFCreatePresentationClock" intptr
; res = MFCreatePresentationClock(ppPresentationClock)
; ppPresentationClock : IMFPresentationClock** out -> "intptr"

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

var (
	mf = windows.NewLazySystemDLL("MF.dll")
	procMFCreatePresentationClock = mf.NewProc("MFCreatePresentationClock")
)

// ppPresentationClock (IMFPresentationClock** out)
r1, _, err := procMFCreatePresentationClock.Call(
	uintptr(ppPresentationClock),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function MFCreatePresentationClock(
  ppPresentationClock: Pointer   // IMFPresentationClock** out
): Integer; stdcall;
  external 'MF.dll' name 'MFCreatePresentationClock';

result := DllCall("MF\MFCreatePresentationClock"
    , "Ptr", ppPresentationClock   ; IMFPresentationClock** out
    , "Int")   ; return: HRESULT

●MFCreatePresentationClock(ppPresentationClock) = DLL("MF.dll", "int MFCreatePresentationClock(void*)")
# 呼び出し: MFCreatePresentationClock(ppPresentationClock)
# ppPresentationClock : IMFPresentationClock** 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)。