MFCreateVideoMixer

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

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

<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。

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)。

const std = @import("std");

extern "evr" fn MFCreateVideoMixer(
    pOwner: ?*anyopaque, // IUnknown* optional
    riidDevice: [*c]GUID, // GUID*
    riid: [*c]GUID, // GUID*
    ppv: ?*anyopaque // void** out
) callconv(std.os.windows.WINAPI) i32;

proc MFCreateVideoMixer(
    pOwner: pointer,  # IUnknown* optional
    riidDevice: ptr GUID,  # GUID*
    riid: ptr GUID,  # GUID*
    ppv: pointer  # void** out
): int32 {.importc: "MFCreateVideoMixer", stdcall, dynlib: "EVR.dll".}

pragma(lib, "evr");
extern(Windows)
int MFCreateVideoMixer(
    void* pOwner,   // IUnknown* optional
    GUID* riidDevice,   // GUID*
    GUID* riid,   // GUID*
    void** ppv   // void** out
);

ccall((:MFCreateVideoMixer, "EVR.dll"), stdcall, Int32,
      (Ptr{Cvoid}, Ptr{GUID}, Ptr{GUID}, Ptr{Cvoid}),
      pOwner, riidDevice, riid, ppv)
# pOwner : IUnknown* optional -> Ptr{Cvoid}
# riidDevice : GUID* -> Ptr{GUID}
# riid : GUID* -> Ptr{GUID}
# ppv : void** out -> Ptr{Cvoid}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t MFCreateVideoMixer(
    void* pOwner,
    void* riidDevice,
    void* riid,
    void** ppv);
]]
local evr = ffi.load("evr")
-- evr.MFCreateVideoMixer(pOwner, riidDevice, riid, ppv)
-- pOwner : IUnknown* optional
-- riidDevice : GUID*
-- riid : GUID*
-- ppv : void** out
-- 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。

const koffi = require('koffi');
const lib = koffi.load('EVR.dll');
const MFCreateVideoMixer = lib.func('__stdcall', 'MFCreateVideoMixer', 'int32_t', ['void *', 'void *', 'void *', 'void *']);
// MFCreateVideoMixer(pOwner, riidDevice, riid, ppv)
// pOwner : IUnknown* optional -> 'void *'
// riidDevice : GUID* -> 'void *'
// riid : GUID* -> 'void *'
// ppv : void** out -> 'void *'
// 出力ポインタは koffi.out(...) で包む。構造体は koffi.struct で定義。

const lib = Deno.dlopen("EVR.dll", {
  MFCreateVideoMixer: { parameters: ["pointer", "pointer", "pointer", "pointer"], result: "i32" },
});
// lib.symbols.MFCreateVideoMixer(pOwner, riidDevice, riid, ppv)
// pOwner : IUnknown* optional -> "pointer"
// riidDevice : GUID* -> "pointer"
// riid : GUID* -> "pointer"
// ppv : void** out -> "pointer"
// 文字列引数は "buffer"(NUL 終端のバイト列を Uint8Array で渡す)。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
int32_t MFCreateVideoMixer(
    void* pOwner,
    void* riidDevice,
    void* riid,
    void** ppv);
C, "EVR.dll");
// $ffi->MFCreateVideoMixer(pOwner, riidDevice, riid, ppv);
// pOwner : IUnknown* optional
// riidDevice : GUID*
// riid : GUID*
// ppv : void** out
// 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。
// WINAPI(stdcall): x64 では呼出規約が統一されるため問題なし。x86 では __stdcall 対応のラッパが必要な場合あり。

import com.sun.jna.*;
import com.sun.jna.ptr.*;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIOptions;

public interface Evr extends StdCallLibrary {
    Evr INSTANCE = Native.load("evr", Evr.class);
    int MFCreateVideoMixer(
        Pointer pOwner,   // IUnknown* optional
        Pointer riidDevice,   // GUID*
        Pointer riid,   // GUID*
        Pointer ppv   // void** out
    );
}

@[Link("evr")]
lib LibEVR
  fun MFCreateVideoMixer = MFCreateVideoMixer(
    pOwner : Void*,   # IUnknown* optional
    riidDevice : GUID*,   # GUID*
    riid : GUID*,   # GUID*
    ppv : Void**   # void** out
  ) : Int32
end
# 構造体/GUID/enum は lib 内に対応する型定義が必要。
# 呼出規約: x64 は規約統一のため OK。x86(32bit)は WINAPI=stdcall だが Crystal の fun に stdcall 付与構文がなく非対応。

import 'dart:ffi';
import 'package:ffi/ffi.dart';

typedef MFCreateVideoMixerNative = Int32 Function(Pointer<Void>, Pointer<Void>, Pointer<Void>, Pointer<Void>);
typedef MFCreateVideoMixerDart = int Function(Pointer<Void>, Pointer<Void>, Pointer<Void>, Pointer<Void>);
final MFCreateVideoMixer = DynamicLibrary.open('EVR.dll')
    .lookupFunction<MFCreateVideoMixerNative, MFCreateVideoMixerDart>('MFCreateVideoMixer');
// pOwner : IUnknown* optional -> Pointer<Void>
// riidDevice : GUID* -> Pointer<Void>
// riid : GUID* -> Pointer<Void>
// ppv : void** out -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function MFCreateVideoMixer(
  pOwner: Pointer;   // IUnknown* optional
  riidDevice: PGUID;   // GUID*
  riid: PGUID;   // GUID*
  ppv: Pointer   // void** out
): Integer; stdcall;
  external 'EVR.dll' name 'MFCreateVideoMixer';

import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "MFCreateVideoMixer"
  c_MFCreateVideoMixer :: Ptr () -> Ptr () -> Ptr () -> Ptr () -> IO Int32
-- pOwner : IUnknown* optional -> Ptr ()
-- riidDevice : GUID* -> Ptr ()
-- riid : GUID* -> Ptr ()
-- ppv : void** out -> Ptr ()
-- 要 GHC(Windows)。stdcall は x64 では ccall として扱われる。ブロックする API は safe 呼び出し推奨。

open Ctypes
open Foreign

let mfcreatevideomixer =
  foreign "MFCreateVideoMixer"
    ((ptr void) @-> (ptr void) @-> (ptr void) @-> (ptr void) @-> returning int32_t)
(* pOwner : IUnknown* optional -> (ptr void) *)
(* riidDevice : GUID* -> (ptr void) *)
(* riid : GUID* -> (ptr void) *)
(* ppv : void** out -> (ptr void) *)
(* foreign は cdecl 前提。x64 Windows では WINAPI と一致。構造体は ctypes structure を定義のこと。 *)

(cffi:define-foreign-library evr (t "EVR.dll"))
(cffi:use-foreign-library evr)

(cffi:defcfun ("MFCreateVideoMixer" mfcreate-video-mixer :convention :stdcall) :int32
  (p-owner :pointer)   ; IUnknown* optional
  (riid-device :pointer)   ; GUID*
  (riid :pointer)   ; GUID*
  (ppv :pointer))   ; void** out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $MFCreateVideoMixer = Win32::API::More->new('EVR',
    'int MFCreateVideoMixer(LPVOID pOwner, LPVOID riidDevice, LPVOID riid, LPVOID ppv)');
# my $ret = $MFCreateVideoMixer->Call($pOwner, $riidDevice, $riid, $ppv);
# pOwner : IUnknown* optional -> LPVOID
# riidDevice : GUID* -> LPVOID
# riid : GUID* -> LPVOID
# ppv : void** out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。