MFCreateVideoSampleAllocator

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

HRESULT MFCreateVideoSampleAllocator(
    const GUID* riid,
    void** ppSampleAllocator
);

<DllImport("EVR.dll", ExactSpelling:=True)>
Public Shared Function MFCreateVideoSampleAllocator(
    ByRef riid As Guid,   ' GUID*
    ppSampleAllocator As IntPtr   ' void** out
) As Integer
End Function

' riid : GUID*
' ppSampleAllocator : void** out
Declare PtrSafe Function MFCreateVideoSampleAllocator Lib "evr" ( _
    ByVal riid As LongPtr, _
    ByVal ppSampleAllocator 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

MFCreateVideoSampleAllocator = ctypes.windll.evr.MFCreateVideoSampleAllocator
MFCreateVideoSampleAllocator.restype = ctypes.c_int
MFCreateVideoSampleAllocator.argtypes = [
    ctypes.c_void_p,  # riid : GUID*
    ctypes.c_void_p,  # ppSampleAllocator : void** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('EVR.dll')
MFCreateVideoSampleAllocator = Fiddle::Function.new(
  lib['MFCreateVideoSampleAllocator'],
  [
    Fiddle::TYPE_VOIDP,  # riid : GUID*
    Fiddle::TYPE_VOIDP,  # ppSampleAllocator : void** out
  ],
  Fiddle::TYPE_INT)

#[link(name = "evr")]
extern "system" {
    fn MFCreateVideoSampleAllocator(
        riid: *const GUID,  // GUID*
        ppSampleAllocator: *mut *mut ()  // void** out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("EVR.dll")]
public static extern int MFCreateVideoSampleAllocator(ref Guid riid, IntPtr ppSampleAllocator);
"@
$api = Add-Type -MemberDefinition $sig -Name 'EVR_MFCreateVideoSampleAllocator' -Namespace Win32 -PassThru
# $api::MFCreateVideoSampleAllocator(riid, ppSampleAllocator)

#uselib "EVR.dll"
#func global MFCreateVideoSampleAllocator "MFCreateVideoSampleAllocator" sptr, sptr
; MFCreateVideoSampleAllocator varptr(riid), ppSampleAllocator   ; 戻り値は stat
; riid : GUID* -> "sptr"
; ppSampleAllocator : 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")
	procMFCreateVideoSampleAllocator = evr.NewProc("MFCreateVideoSampleAllocator")
)

// riid (GUID*), ppSampleAllocator (void** out)
r1, _, err := procMFCreateVideoSampleAllocator.Call(
	uintptr(riid),
	uintptr(ppSampleAllocator),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function MFCreateVideoSampleAllocator(
  riid: PGUID;   // GUID*
  ppSampleAllocator: Pointer   // void** out
): Integer; stdcall;
  external 'EVR.dll' name 'MFCreateVideoSampleAllocator';

result := DllCall("EVR\MFCreateVideoSampleAllocator"
    , "Ptr", riid   ; GUID*
    , "Ptr", ppSampleAllocator   ; void** out
    , "Int")   ; return: HRESULT

●MFCreateVideoSampleAllocator(riid, ppSampleAllocator) = DLL("EVR.dll", "int MFCreateVideoSampleAllocator(void*, void*)")
# 呼び出し: MFCreateVideoSampleAllocator(riid, ppSampleAllocator)
# riid : GUID* -> "void*"
# ppSampleAllocator : 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 MFCreateVideoSampleAllocator(
    riid: [*c]GUID, // GUID*
    ppSampleAllocator: ?*anyopaque // void** out
) callconv(std.os.windows.WINAPI) i32;

proc MFCreateVideoSampleAllocator(
    riid: ptr GUID,  # GUID*
    ppSampleAllocator: pointer  # void** out
): int32 {.importc: "MFCreateVideoSampleAllocator", stdcall, dynlib: "EVR.dll".}

pragma(lib, "evr");
extern(Windows)
int MFCreateVideoSampleAllocator(
    GUID* riid,   // GUID*
    void** ppSampleAllocator   // void** out
);

ccall((:MFCreateVideoSampleAllocator, "EVR.dll"), stdcall, Int32,
      (Ptr{GUID}, Ptr{Cvoid}),
      riid, ppSampleAllocator)
# riid : GUID* -> Ptr{GUID}
# ppSampleAllocator : 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 MFCreateVideoSampleAllocator(
    void* riid,
    void** ppSampleAllocator);
]]
local evr = ffi.load("evr")
-- evr.MFCreateVideoSampleAllocator(riid, ppSampleAllocator)
-- riid : GUID*
-- ppSampleAllocator : 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 MFCreateVideoSampleAllocator = lib.func('__stdcall', 'MFCreateVideoSampleAllocator', 'int32_t', ['void *', 'void *']);
// MFCreateVideoSampleAllocator(riid, ppSampleAllocator)
// riid : GUID* -> 'void *'
// ppSampleAllocator : 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", {
  MFCreateVideoSampleAllocator: { parameters: ["pointer", "pointer"], result: "i32" },
});
// lib.symbols.MFCreateVideoSampleAllocator(riid, ppSampleAllocator)
// riid : GUID* -> "pointer"
// ppSampleAllocator : 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 MFCreateVideoSampleAllocator(
    void* riid,
    void** ppSampleAllocator);
C, "EVR.dll");
// $ffi->MFCreateVideoSampleAllocator(riid, ppSampleAllocator);
// riid : GUID*
// ppSampleAllocator : 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 MFCreateVideoSampleAllocator(
        Pointer riid,   // GUID*
        Pointer ppSampleAllocator   // void** out
    );
}

@[Link("evr")]
lib LibEVR
  fun MFCreateVideoSampleAllocator = MFCreateVideoSampleAllocator(
    riid : GUID*,   # GUID*
    ppSampleAllocator : 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 MFCreateVideoSampleAllocatorNative = Int32 Function(Pointer<Void>, Pointer<Void>);
typedef MFCreateVideoSampleAllocatorDart = int Function(Pointer<Void>, Pointer<Void>);
final MFCreateVideoSampleAllocator = DynamicLibrary.open('EVR.dll')
    .lookupFunction<MFCreateVideoSampleAllocatorNative, MFCreateVideoSampleAllocatorDart>('MFCreateVideoSampleAllocator');
// riid : GUID* -> Pointer<Void>
// ppSampleAllocator : void** out -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function MFCreateVideoSampleAllocator(
  riid: PGUID;   // GUID*
  ppSampleAllocator: Pointer   // void** out
): Integer; stdcall;
  external 'EVR.dll' name 'MFCreateVideoSampleAllocator';

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

foreign import stdcall safe "MFCreateVideoSampleAllocator"
  c_MFCreateVideoSampleAllocator :: Ptr () -> Ptr () -> IO Int32
-- riid : GUID* -> Ptr ()
-- ppSampleAllocator : 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 mfcreatevideosampleallocator =
  foreign "MFCreateVideoSampleAllocator"
    ((ptr void) @-> (ptr void) @-> returning int32_t)
(* riid : GUID* -> (ptr void) *)
(* ppSampleAllocator : 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 ("MFCreateVideoSampleAllocator" mfcreate-video-sample-allocator :convention :stdcall) :int32
  (riid :pointer)   ; GUID*
  (pp-sample-allocator :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 $MFCreateVideoSampleAllocator = Win32::API::More->new('EVR',
    'int MFCreateVideoSampleAllocator(LPVOID riid, LPVOID ppSampleAllocator)');
# my $ret = $MFCreateVideoSampleAllocator->Call($riid, $ppSampleAllocator);
# riid : GUID* -> LPVOID
# ppSampleAllocator : 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。