MFCreateMediaBufferWrapper

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

HRESULT MFCreateMediaBufferWrapper(
    IMFMediaBuffer* pBuffer,
    DWORD cbOffset,
    DWORD dwLength,
    IMFMediaBuffer** ppBuffer
);

<DllImport("MFPlat.dll", ExactSpelling:=True)>
Public Shared Function MFCreateMediaBufferWrapper(
    pBuffer As IntPtr,   ' IMFMediaBuffer*
    cbOffset As UInteger,   ' DWORD
    dwLength As UInteger,   ' DWORD
    ppBuffer As IntPtr   ' IMFMediaBuffer** out
) As Integer
End Function

' pBuffer : IMFMediaBuffer*
' cbOffset : DWORD
' dwLength : DWORD
' ppBuffer : IMFMediaBuffer** out
Declare PtrSafe Function MFCreateMediaBufferWrapper Lib "mfplat" ( _
    ByVal pBuffer As LongPtr, _
    ByVal cbOffset As Long, _
    ByVal dwLength As Long, _
    ByVal ppBuffer 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

MFCreateMediaBufferWrapper = ctypes.windll.mfplat.MFCreateMediaBufferWrapper
MFCreateMediaBufferWrapper.restype = ctypes.c_int
MFCreateMediaBufferWrapper.argtypes = [
    ctypes.c_void_p,  # pBuffer : IMFMediaBuffer*
    wintypes.DWORD,  # cbOffset : DWORD
    wintypes.DWORD,  # dwLength : DWORD
    ctypes.c_void_p,  # ppBuffer : IMFMediaBuffer** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('MFPlat.dll')
MFCreateMediaBufferWrapper = Fiddle::Function.new(
  lib['MFCreateMediaBufferWrapper'],
  [
    Fiddle::TYPE_VOIDP,  # pBuffer : IMFMediaBuffer*
    -Fiddle::TYPE_INT,  # cbOffset : DWORD
    -Fiddle::TYPE_INT,  # dwLength : DWORD
    Fiddle::TYPE_VOIDP,  # ppBuffer : IMFMediaBuffer** out
  ],
  Fiddle::TYPE_INT)

#[link(name = "mfplat")]
extern "system" {
    fn MFCreateMediaBufferWrapper(
        pBuffer: *mut core::ffi::c_void,  // IMFMediaBuffer*
        cbOffset: u32,  // DWORD
        dwLength: u32,  // DWORD
        ppBuffer: *mut *mut core::ffi::c_void  // IMFMediaBuffer** out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("MFPlat.dll")]
public static extern int MFCreateMediaBufferWrapper(IntPtr pBuffer, uint cbOffset, uint dwLength, IntPtr ppBuffer);
"@
$api = Add-Type -MemberDefinition $sig -Name 'MFPlat_MFCreateMediaBufferWrapper' -Namespace Win32 -PassThru
# $api::MFCreateMediaBufferWrapper(pBuffer, cbOffset, dwLength, ppBuffer)

#uselib "MFPlat.dll"
#func global MFCreateMediaBufferWrapper "MFCreateMediaBufferWrapper" sptr, sptr, sptr, sptr
; MFCreateMediaBufferWrapper pBuffer, cbOffset, dwLength, ppBuffer   ; 戻り値は stat
; pBuffer : IMFMediaBuffer* -> "sptr"
; cbOffset : DWORD -> "sptr"
; dwLength : DWORD -> "sptr"
; ppBuffer : IMFMediaBuffer** 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 MFCreateMediaBufferWrapper "MFCreateMediaBufferWrapper" sptr, int, int, sptr
; res = MFCreateMediaBufferWrapper(pBuffer, cbOffset, dwLength, ppBuffer)
; pBuffer : IMFMediaBuffer* -> "sptr"
; cbOffset : DWORD -> "int"
; dwLength : DWORD -> "int"
; ppBuffer : IMFMediaBuffer** out -> "sptr"

; HRESULT MFCreateMediaBufferWrapper(IMFMediaBuffer* pBuffer, DWORD cbOffset, DWORD dwLength, IMFMediaBuffer** ppBuffer)
#uselib "MFPlat.dll"
#cfunc global MFCreateMediaBufferWrapper "MFCreateMediaBufferWrapper" intptr, int, int, intptr
; res = MFCreateMediaBufferWrapper(pBuffer, cbOffset, dwLength, ppBuffer)
; pBuffer : IMFMediaBuffer* -> "intptr"
; cbOffset : DWORD -> "int"
; dwLength : DWORD -> "int"
; ppBuffer : IMFMediaBuffer** out -> "intptr"

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

var (
	mfplat = windows.NewLazySystemDLL("MFPlat.dll")
	procMFCreateMediaBufferWrapper = mfplat.NewProc("MFCreateMediaBufferWrapper")
)

// pBuffer (IMFMediaBuffer*), cbOffset (DWORD), dwLength (DWORD), ppBuffer (IMFMediaBuffer** out)
r1, _, err := procMFCreateMediaBufferWrapper.Call(
	uintptr(pBuffer),
	uintptr(cbOffset),
	uintptr(dwLength),
	uintptr(ppBuffer),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function MFCreateMediaBufferWrapper(
  pBuffer: Pointer;   // IMFMediaBuffer*
  cbOffset: DWORD;   // DWORD
  dwLength: DWORD;   // DWORD
  ppBuffer: Pointer   // IMFMediaBuffer** out
): Integer; stdcall;
  external 'MFPlat.dll' name 'MFCreateMediaBufferWrapper';

result := DllCall("MFPlat\MFCreateMediaBufferWrapper"
    , "Ptr", pBuffer   ; IMFMediaBuffer*
    , "UInt", cbOffset   ; DWORD
    , "UInt", dwLength   ; DWORD
    , "Ptr", ppBuffer   ; IMFMediaBuffer** out
    , "Int")   ; return: HRESULT

●MFCreateMediaBufferWrapper(pBuffer, cbOffset, dwLength, ppBuffer) = DLL("MFPlat.dll", "int MFCreateMediaBufferWrapper(void*, dword, dword, void*)")
# 呼び出し: MFCreateMediaBufferWrapper(pBuffer, cbOffset, dwLength, ppBuffer)
# pBuffer : IMFMediaBuffer* -> "void*"
# cbOffset : DWORD -> "dword"
# dwLength : DWORD -> "dword"
# ppBuffer : IMFMediaBuffer** 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 "mfplat" fn MFCreateMediaBufferWrapper(
    pBuffer: ?*anyopaque, // IMFMediaBuffer*
    cbOffset: u32, // DWORD
    dwLength: u32, // DWORD
    ppBuffer: ?*anyopaque // IMFMediaBuffer** out
) callconv(std.os.windows.WINAPI) i32;

proc MFCreateMediaBufferWrapper(
    pBuffer: pointer,  # IMFMediaBuffer*
    cbOffset: uint32,  # DWORD
    dwLength: uint32,  # DWORD
    ppBuffer: pointer  # IMFMediaBuffer** out
): int32 {.importc: "MFCreateMediaBufferWrapper", stdcall, dynlib: "MFPlat.dll".}

pragma(lib, "mfplat");
extern(Windows)
int MFCreateMediaBufferWrapper(
    void* pBuffer,   // IMFMediaBuffer*
    uint cbOffset,   // DWORD
    uint dwLength,   // DWORD
    void* ppBuffer   // IMFMediaBuffer** out
);

ccall((:MFCreateMediaBufferWrapper, "MFPlat.dll"), stdcall, Int32,
      (Ptr{Cvoid}, UInt32, UInt32, Ptr{Cvoid}),
      pBuffer, cbOffset, dwLength, ppBuffer)
# pBuffer : IMFMediaBuffer* -> Ptr{Cvoid}
# cbOffset : DWORD -> UInt32
# dwLength : DWORD -> UInt32
# ppBuffer : IMFMediaBuffer** 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 MFCreateMediaBufferWrapper(
    void* pBuffer,
    uint32_t cbOffset,
    uint32_t dwLength,
    void* ppBuffer);
]]
local mfplat = ffi.load("mfplat")
-- mfplat.MFCreateMediaBufferWrapper(pBuffer, cbOffset, dwLength, ppBuffer)
-- pBuffer : IMFMediaBuffer*
-- cbOffset : DWORD
-- dwLength : DWORD
-- ppBuffer : IMFMediaBuffer** 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('MFPlat.dll');
const MFCreateMediaBufferWrapper = lib.func('__stdcall', 'MFCreateMediaBufferWrapper', 'int32_t', ['void *', 'uint32_t', 'uint32_t', 'void *']);
// MFCreateMediaBufferWrapper(pBuffer, cbOffset, dwLength, ppBuffer)
// pBuffer : IMFMediaBuffer* -> 'void *'
// cbOffset : DWORD -> 'uint32_t'
// dwLength : DWORD -> 'uint32_t'
// ppBuffer : IMFMediaBuffer** 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("MFPlat.dll", {
  MFCreateMediaBufferWrapper: { parameters: ["pointer", "u32", "u32", "pointer"], result: "i32" },
});
// lib.symbols.MFCreateMediaBufferWrapper(pBuffer, cbOffset, dwLength, ppBuffer)
// pBuffer : IMFMediaBuffer* -> "pointer"
// cbOffset : DWORD -> "u32"
// dwLength : DWORD -> "u32"
// ppBuffer : IMFMediaBuffer** 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 MFCreateMediaBufferWrapper(
    void* pBuffer,
    uint32_t cbOffset,
    uint32_t dwLength,
    void* ppBuffer);
C, "MFPlat.dll");
// $ffi->MFCreateMediaBufferWrapper(pBuffer, cbOffset, dwLength, ppBuffer);
// pBuffer : IMFMediaBuffer*
// cbOffset : DWORD
// dwLength : DWORD
// ppBuffer : IMFMediaBuffer** 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 Mfplat extends StdCallLibrary {
    Mfplat INSTANCE = Native.load("mfplat", Mfplat.class);
    int MFCreateMediaBufferWrapper(
        Pointer pBuffer,   // IMFMediaBuffer*
        int cbOffset,   // DWORD
        int dwLength,   // DWORD
        Pointer ppBuffer   // IMFMediaBuffer** out
    );
}

@[Link("mfplat")]
lib LibMFPlat
  fun MFCreateMediaBufferWrapper = MFCreateMediaBufferWrapper(
    pBuffer : Void*,   # IMFMediaBuffer*
    cbOffset : UInt32,   # DWORD
    dwLength : UInt32,   # DWORD
    ppBuffer : Void*   # IMFMediaBuffer** 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 MFCreateMediaBufferWrapperNative = Int32 Function(Pointer<Void>, Uint32, Uint32, Pointer<Void>);
typedef MFCreateMediaBufferWrapperDart = int Function(Pointer<Void>, int, int, Pointer<Void>);
final MFCreateMediaBufferWrapper = DynamicLibrary.open('MFPlat.dll')
    .lookupFunction<MFCreateMediaBufferWrapperNative, MFCreateMediaBufferWrapperDart>('MFCreateMediaBufferWrapper');
// pBuffer : IMFMediaBuffer* -> Pointer<Void>
// cbOffset : DWORD -> Uint32
// dwLength : DWORD -> Uint32
// ppBuffer : IMFMediaBuffer** out -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function MFCreateMediaBufferWrapper(
  pBuffer: Pointer;   // IMFMediaBuffer*
  cbOffset: DWORD;   // DWORD
  dwLength: DWORD;   // DWORD
  ppBuffer: Pointer   // IMFMediaBuffer** out
): Integer; stdcall;
  external 'MFPlat.dll' name 'MFCreateMediaBufferWrapper';

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

foreign import stdcall safe "MFCreateMediaBufferWrapper"
  c_MFCreateMediaBufferWrapper :: Ptr () -> Word32 -> Word32 -> Ptr () -> IO Int32
-- pBuffer : IMFMediaBuffer* -> Ptr ()
-- cbOffset : DWORD -> Word32
-- dwLength : DWORD -> Word32
-- ppBuffer : IMFMediaBuffer** 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 mfcreatemediabufferwrapper =
  foreign "MFCreateMediaBufferWrapper"
    ((ptr void) @-> uint32_t @-> uint32_t @-> (ptr void) @-> returning int32_t)
(* pBuffer : IMFMediaBuffer* -> (ptr void) *)
(* cbOffset : DWORD -> uint32_t *)
(* dwLength : DWORD -> uint32_t *)
(* ppBuffer : IMFMediaBuffer** 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 mfplat (t "MFPlat.dll"))
(cffi:use-foreign-library mfplat)

(cffi:defcfun ("MFCreateMediaBufferWrapper" mfcreate-media-buffer-wrapper :convention :stdcall) :int32
  (p-buffer :pointer)   ; IMFMediaBuffer*
  (cb-offset :uint32)   ; DWORD
  (dw-length :uint32)   ; DWORD
  (pp-buffer :pointer))   ; IMFMediaBuffer** out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $MFCreateMediaBufferWrapper = Win32::API::More->new('MFPlat',
    'int MFCreateMediaBufferWrapper(LPVOID pBuffer, DWORD cbOffset, DWORD dwLength, LPVOID ppBuffer)');
# my $ret = $MFCreateMediaBufferWrapper->Call($pBuffer, $cbOffset, $dwLength, $ppBuffer);
# pBuffer : IMFMediaBuffer* -> LPVOID
# cbOffset : DWORD -> DWORD
# dwLength : DWORD -> DWORD
# ppBuffer : IMFMediaBuffer** out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。