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MFCreateVideoMixer

関数
拡張ビデオレンダラー用のビデオミキサーを作成する。
DLLEVR.dll呼出規約winapi
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シグネチャ

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

HRESULT MFCreateVideoMixer(
    IUnknown* pOwner,   // optional
    const GUID* riidDevice,
    const GUID* riid,
    void** ppv
);

パラメーター

名前型方向説明
pOwnerIUnknown*inoptionalミキサーを所有するオブジェクトのIUnknownへのポインタ。NULL可。
riidDeviceGUID*inミキサーが使用するデバイスのインターフェイスIIDへのポインタ。
riidGUID*in要求するミキサーインターフェイスのIIDへのポインタ。
ppvvoid**out生成されたビデオミキサーを受け取るポインタのアドレス。

戻り値の型: HRESULT

各言語での呼び出し定義

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

HRESULT MFCreateVideoMixer(
    IUnknown* pOwner,   // optional
    const GUID* riidDevice,
    const GUID* riid,
    void** ppv
);
[DllImport("EVR.dll", ExactSpelling = true)]
static extern int MFCreateVideoMixer(
    IntPtr pOwner,   // IUnknown* optional
    ref Guid riidDevice,   // GUID*
    ref Guid riid,   // GUID*
    IntPtr ppv   // void** out
);
<DllImport("EVR.dll", ExactSpelling:=True)>
Public Shared Function MFCreateVideoMixer(
    pOwner As IntPtr,   ' IUnknown* optional
    ByRef riidDevice As Guid,   ' GUID*
    ByRef riid As Guid,   ' GUID*
    ppv As IntPtr   ' void** out
) As Integer
End Function
' pOwner : IUnknown* optional
' riidDevice : GUID*
' riid : GUID*
' ppv : void** out
Declare PtrSafe Function MFCreateVideoMixer Lib "evr" ( _
    ByVal pOwner As LongPtr, _
    ByVal riidDevice As LongPtr, _
    ByVal riid As LongPtr, _
    ByVal ppv 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

MFCreateVideoMixer = ctypes.windll.evr.MFCreateVideoMixer
MFCreateVideoMixer.restype = ctypes.c_int
MFCreateVideoMixer.argtypes = [
    ctypes.c_void_p,  # pOwner : IUnknown* optional
    ctypes.c_void_p,  # riidDevice : GUID*
    ctypes.c_void_p,  # riid : GUID*
    ctypes.c_void_p,  # ppv : void** out
]
require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('EVR.dll')
MFCreateVideoMixer = Fiddle::Function.new(
  lib['MFCreateVideoMixer'],
  [
    Fiddle::TYPE_VOIDP,  # pOwner : IUnknown* optional
    Fiddle::TYPE_VOIDP,  # riidDevice : GUID*
    Fiddle::TYPE_VOIDP,  # riid : GUID*
    Fiddle::TYPE_VOIDP,  # ppv : void** out
  ],
  Fiddle::TYPE_INT)
#[link(name = "evr")]
extern "system" {
    fn MFCreateVideoMixer(
        pOwner: *mut core::ffi::c_void,  // IUnknown* optional
        riidDevice: *const GUID,  // GUID*
        riid: *const GUID,  // GUID*
        ppv: *mut *mut ()  // void** out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.
$sig = @"
[DllImport("EVR.dll")]
public static extern int MFCreateVideoMixer(IntPtr pOwner, ref Guid riidDevice, ref Guid riid, IntPtr ppv);
"@
$api = Add-Type -MemberDefinition $sig -Name 'EVR_MFCreateVideoMixer' -Namespace Win32 -PassThru
# $api::MFCreateVideoMixer(pOwner, riidDevice, riid, ppv)
#uselib "EVR.dll"
#func global MFCreateVideoMixer "MFCreateVideoMixer" sptr, sptr, sptr, sptr
; MFCreateVideoMixer pOwner, varptr(riidDevice), varptr(riid), ppv   ; 戻り値は stat
; pOwner : IUnknown* optional -> "sptr"
; riidDevice : GUID* -> "sptr"
; riid : GUID* -> "sptr"
; ppv : void** 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。
出力引数: 
#uselib "EVR.dll"
#cfunc global MFCreateVideoMixer "MFCreateVideoMixer" sptr, var, var, sptr
; res = MFCreateVideoMixer(pOwner, riidDevice, riid, ppv)
; pOwner : IUnknown* optional -> "sptr"
; riidDevice : GUID* -> "var"
; riid : GUID* -> "var"
; ppv : void** out -> "sptr"
; ※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。
出力引数: 
; HRESULT MFCreateVideoMixer(IUnknown* pOwner, GUID* riidDevice, GUID* riid, void** ppv)
#uselib "EVR.dll"
#cfunc global MFCreateVideoMixer "MFCreateVideoMixer" intptr, var, var, intptr
; res = MFCreateVideoMixer(pOwner, riidDevice, riid, ppv)
; pOwner : IUnknown* optional -> "intptr"
; riidDevice : GUID* -> "var"
; riid : GUID* -> "var"
; ppv : void** out -> "intptr"
; ※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 (
	evr = windows.NewLazySystemDLL("EVR.dll")
	procMFCreateVideoMixer = evr.NewProc("MFCreateVideoMixer")
)

// pOwner (IUnknown* optional), riidDevice (GUID*), riid (GUID*), ppv (void** out)
r1, _, err := procMFCreateVideoMixer.Call(
	uintptr(pOwner),
	uintptr(riidDevice),
	uintptr(riid),
	uintptr(ppv),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT
function MFCreateVideoMixer(
  pOwner: Pointer;   // IUnknown* optional
  riidDevice: PGUID;   // GUID*
  riid: PGUID;   // GUID*
  ppv: Pointer   // void** out
): Integer; stdcall;
  external 'EVR.dll' name 'MFCreateVideoMixer';
result := DllCall("EVR\MFCreateVideoMixer"
    , "Ptr", pOwner   ; IUnknown* optional
    , "Ptr", riidDevice   ; GUID*
    , "Ptr", riid   ; GUID*
    , "Ptr", ppv   ; void** out
    , "Int")   ; return: HRESULT
●MFCreateVideoMixer(pOwner, riidDevice, riid, ppv) = DLL("EVR.dll", "int MFCreateVideoMixer(void*, void*, void*, void*)")
# 呼び出し: MFCreateVideoMixer(pOwner, riidDevice, riid, ppv)
# pOwner : IUnknown* optional -> "void*"
# riidDevice : GUID* -> "void*"
# riid : GUID* -> "void*"
# ppv : void** 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)。