MFCreateStreamDescriptor

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

HRESULT MFCreateStreamDescriptor(
    DWORD dwStreamIdentifier,
    DWORD cMediaTypes,
    IMFMediaType** apMediaTypes,
    IMFStreamDescriptor** ppDescriptor
);

<DllImport("MFPlat.dll", ExactSpelling:=True)>
Public Shared Function MFCreateStreamDescriptor(
    dwStreamIdentifier As UInteger,   ' DWORD
    cMediaTypes As UInteger,   ' DWORD
    apMediaTypes As IntPtr,   ' IMFMediaType**
    ppDescriptor As IntPtr   ' IMFStreamDescriptor** out
) As Integer
End Function

' dwStreamIdentifier : DWORD
' cMediaTypes : DWORD
' apMediaTypes : IMFMediaType**
' ppDescriptor : IMFStreamDescriptor** out
Declare PtrSafe Function MFCreateStreamDescriptor Lib "mfplat" ( _
    ByVal dwStreamIdentifier As Long, _
    ByVal cMediaTypes As Long, _
    ByVal apMediaTypes As LongPtr, _
    ByVal ppDescriptor 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

MFCreateStreamDescriptor = ctypes.windll.mfplat.MFCreateStreamDescriptor
MFCreateStreamDescriptor.restype = ctypes.c_int
MFCreateStreamDescriptor.argtypes = [
    wintypes.DWORD,  # dwStreamIdentifier : DWORD
    wintypes.DWORD,  # cMediaTypes : DWORD
    ctypes.c_void_p,  # apMediaTypes : IMFMediaType**
    ctypes.c_void_p,  # ppDescriptor : IMFStreamDescriptor** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('MFPlat.dll')
MFCreateStreamDescriptor = Fiddle::Function.new(
  lib['MFCreateStreamDescriptor'],
  [
    -Fiddle::TYPE_INT,  # dwStreamIdentifier : DWORD
    -Fiddle::TYPE_INT,  # cMediaTypes : DWORD
    Fiddle::TYPE_VOIDP,  # apMediaTypes : IMFMediaType**
    Fiddle::TYPE_VOIDP,  # ppDescriptor : IMFStreamDescriptor** out
  ],
  Fiddle::TYPE_INT)

#[link(name = "mfplat")]
extern "system" {
    fn MFCreateStreamDescriptor(
        dwStreamIdentifier: u32,  // DWORD
        cMediaTypes: u32,  // DWORD
        apMediaTypes: *mut *mut core::ffi::c_void,  // IMFMediaType**
        ppDescriptor: *mut *mut core::ffi::c_void  // IMFStreamDescriptor** out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("MFPlat.dll")]
public static extern int MFCreateStreamDescriptor(uint dwStreamIdentifier, uint cMediaTypes, IntPtr apMediaTypes, IntPtr ppDescriptor);
"@
$api = Add-Type -MemberDefinition $sig -Name 'MFPlat_MFCreateStreamDescriptor' -Namespace Win32 -PassThru
# $api::MFCreateStreamDescriptor(dwStreamIdentifier, cMediaTypes, apMediaTypes, ppDescriptor)

#uselib "MFPlat.dll"
#func global MFCreateStreamDescriptor "MFCreateStreamDescriptor" sptr, sptr, sptr, sptr
; MFCreateStreamDescriptor dwStreamIdentifier, cMediaTypes, apMediaTypes, ppDescriptor   ; 戻り値は stat
; dwStreamIdentifier : DWORD -> "sptr"
; cMediaTypes : DWORD -> "sptr"
; apMediaTypes : IMFMediaType** -> "sptr"
; ppDescriptor : IMFStreamDescriptor** 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 "MFPlat.dll"
#cfunc global MFCreateStreamDescriptor "MFCreateStreamDescriptor" int, int, sptr, sptr
; res = MFCreateStreamDescriptor(dwStreamIdentifier, cMediaTypes, apMediaTypes, ppDescriptor)
; dwStreamIdentifier : DWORD -> "int"
; cMediaTypes : DWORD -> "int"
; apMediaTypes : IMFMediaType** -> "sptr"
; ppDescriptor : IMFStreamDescriptor** out -> "sptr"

; HRESULT MFCreateStreamDescriptor(DWORD dwStreamIdentifier, DWORD cMediaTypes, IMFMediaType** apMediaTypes, IMFStreamDescriptor** ppDescriptor)
#uselib "MFPlat.dll"
#cfunc global MFCreateStreamDescriptor "MFCreateStreamDescriptor" int, int, intptr, intptr
; res = MFCreateStreamDescriptor(dwStreamIdentifier, cMediaTypes, apMediaTypes, ppDescriptor)
; dwStreamIdentifier : DWORD -> "int"
; cMediaTypes : DWORD -> "int"
; apMediaTypes : IMFMediaType** -> "intptr"
; ppDescriptor : IMFStreamDescriptor** out -> "intptr"

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

var (
	mfplat = windows.NewLazySystemDLL("MFPlat.dll")
	procMFCreateStreamDescriptor = mfplat.NewProc("MFCreateStreamDescriptor")
)

// dwStreamIdentifier (DWORD), cMediaTypes (DWORD), apMediaTypes (IMFMediaType**), ppDescriptor (IMFStreamDescriptor** out)
r1, _, err := procMFCreateStreamDescriptor.Call(
	uintptr(dwStreamIdentifier),
	uintptr(cMediaTypes),
	uintptr(apMediaTypes),
	uintptr(ppDescriptor),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function MFCreateStreamDescriptor(
  dwStreamIdentifier: DWORD;   // DWORD
  cMediaTypes: DWORD;   // DWORD
  apMediaTypes: Pointer;   // IMFMediaType**
  ppDescriptor: Pointer   // IMFStreamDescriptor** out
): Integer; stdcall;
  external 'MFPlat.dll' name 'MFCreateStreamDescriptor';

result := DllCall("MFPlat\MFCreateStreamDescriptor"
    , "UInt", dwStreamIdentifier   ; DWORD
    , "UInt", cMediaTypes   ; DWORD
    , "Ptr", apMediaTypes   ; IMFMediaType**
    , "Ptr", ppDescriptor   ; IMFStreamDescriptor** out
    , "Int")   ; return: HRESULT

●MFCreateStreamDescriptor(dwStreamIdentifier, cMediaTypes, apMediaTypes, ppDescriptor) = DLL("MFPlat.dll", "int MFCreateStreamDescriptor(dword, dword, void*, void*)")
# 呼び出し: MFCreateStreamDescriptor(dwStreamIdentifier, cMediaTypes, apMediaTypes, ppDescriptor)
# dwStreamIdentifier : DWORD -> "dword"
# cMediaTypes : DWORD -> "dword"
# apMediaTypes : IMFMediaType** -> "void*"
# ppDescriptor : IMFStreamDescriptor** 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)。