MFCreateSourceReaderFromURL

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

HRESULT MFCreateSourceReaderFromURL(
    LPCWSTR pwszURL,
    IMFAttributes* pAttributes,   // optional
    IMFSourceReader** ppSourceReader
);

<DllImport("MFReadWrite.dll", ExactSpelling:=True)>
Public Shared Function MFCreateSourceReaderFromURL(
    <MarshalAs(UnmanagedType.LPWStr)> pwszURL As String,   ' LPCWSTR
    pAttributes As IntPtr,   ' IMFAttributes* optional
    ppSourceReader As IntPtr   ' IMFSourceReader** out
) As Integer
End Function

' pwszURL : LPCWSTR
' pAttributes : IMFAttributes* optional
' ppSourceReader : IMFSourceReader** out
Declare PtrSafe Function MFCreateSourceReaderFromURL Lib "mfreadwrite" ( _
    ByVal pwszURL As LongPtr, _
    ByVal pAttributes As LongPtr, _
    ByVal ppSourceReader 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

MFCreateSourceReaderFromURL = ctypes.windll.mfreadwrite.MFCreateSourceReaderFromURL
MFCreateSourceReaderFromURL.restype = ctypes.c_int
MFCreateSourceReaderFromURL.argtypes = [
    wintypes.LPCWSTR,  # pwszURL : LPCWSTR
    ctypes.c_void_p,  # pAttributes : IMFAttributes* optional
    ctypes.c_void_p,  # ppSourceReader : IMFSourceReader** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('MFReadWrite.dll')
MFCreateSourceReaderFromURL = Fiddle::Function.new(
  lib['MFCreateSourceReaderFromURL'],
  [
    Fiddle::TYPE_VOIDP,  # pwszURL : LPCWSTR
    Fiddle::TYPE_VOIDP,  # pAttributes : IMFAttributes* optional
    Fiddle::TYPE_VOIDP,  # ppSourceReader : IMFSourceReader** out
  ],
  Fiddle::TYPE_INT)

#[link(name = "mfreadwrite")]
extern "system" {
    fn MFCreateSourceReaderFromURL(
        pwszURL: *const u16,  // LPCWSTR
        pAttributes: *mut core::ffi::c_void,  // IMFAttributes* optional
        ppSourceReader: *mut *mut core::ffi::c_void  // IMFSourceReader** out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("MFReadWrite.dll")]
public static extern int MFCreateSourceReaderFromURL([MarshalAs(UnmanagedType.LPWStr)] string pwszURL, IntPtr pAttributes, IntPtr ppSourceReader);
"@
$api = Add-Type -MemberDefinition $sig -Name 'MFReadWrite_MFCreateSourceReaderFromURL' -Namespace Win32 -PassThru
# $api::MFCreateSourceReaderFromURL(pwszURL, pAttributes, ppSourceReader)

#uselib "MFReadWrite.dll"
#func global MFCreateSourceReaderFromURL "MFCreateSourceReaderFromURL" sptr, sptr, sptr
; MFCreateSourceReaderFromURL pwszURL, pAttributes, ppSourceReader   ; 戻り値は stat
; pwszURL : LPCWSTR -> "sptr"
; pAttributes : IMFAttributes* optional -> "sptr"
; ppSourceReader : IMFSourceReader** 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 "MFReadWrite.dll"
#cfunc global MFCreateSourceReaderFromURL "MFCreateSourceReaderFromURL" wstr, sptr, sptr
; res = MFCreateSourceReaderFromURL(pwszURL, pAttributes, ppSourceReader)
; pwszURL : LPCWSTR -> "wstr"
; pAttributes : IMFAttributes* optional -> "sptr"
; ppSourceReader : IMFSourceReader** out -> "sptr"

; HRESULT MFCreateSourceReaderFromURL(LPCWSTR pwszURL, IMFAttributes* pAttributes, IMFSourceReader** ppSourceReader)
#uselib "MFReadWrite.dll"
#cfunc global MFCreateSourceReaderFromURL "MFCreateSourceReaderFromURL" wstr, intptr, intptr
; res = MFCreateSourceReaderFromURL(pwszURL, pAttributes, ppSourceReader)
; pwszURL : LPCWSTR -> "wstr"
; pAttributes : IMFAttributes* optional -> "intptr"
; ppSourceReader : IMFSourceReader** out -> "intptr"

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

var (
	mfreadwrite = windows.NewLazySystemDLL("MFReadWrite.dll")
	procMFCreateSourceReaderFromURL = mfreadwrite.NewProc("MFCreateSourceReaderFromURL")
)

// pwszURL (LPCWSTR), pAttributes (IMFAttributes* optional), ppSourceReader (IMFSourceReader** out)
r1, _, err := procMFCreateSourceReaderFromURL.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pwszURL))),
	uintptr(pAttributes),
	uintptr(ppSourceReader),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function MFCreateSourceReaderFromURL(
  pwszURL: PWideChar;   // LPCWSTR
  pAttributes: Pointer;   // IMFAttributes* optional
  ppSourceReader: Pointer   // IMFSourceReader** out
): Integer; stdcall;
  external 'MFReadWrite.dll' name 'MFCreateSourceReaderFromURL';

result := DllCall("MFReadWrite\MFCreateSourceReaderFromURL"
    , "WStr", pwszURL   ; LPCWSTR
    , "Ptr", pAttributes   ; IMFAttributes* optional
    , "Ptr", ppSourceReader   ; IMFSourceReader** out
    , "Int")   ; return: HRESULT

●MFCreateSourceReaderFromURL(pwszURL, pAttributes, ppSourceReader) = DLL("MFReadWrite.dll", "int MFCreateSourceReaderFromURL(char*, void*, void*)")
# 呼び出し: MFCreateSourceReaderFromURL(pwszURL, pAttributes, ppSourceReader)
# pwszURL : LPCWSTR -> "char*"
# pAttributes : IMFAttributes* optional -> "void*"
# ppSourceReader : IMFSourceReader** 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 "mfreadwrite" fn MFCreateSourceReaderFromURL(
    pwszURL: [*c]const u16, // LPCWSTR
    pAttributes: ?*anyopaque, // IMFAttributes* optional
    ppSourceReader: ?*anyopaque // IMFSourceReader** out
) callconv(std.os.windows.WINAPI) i32;

proc MFCreateSourceReaderFromURL(
    pwszURL: WideCString,  # LPCWSTR
    pAttributes: pointer,  # IMFAttributes* optional
    ppSourceReader: pointer  # IMFSourceReader** out
): int32 {.importc: "MFCreateSourceReaderFromURL", stdcall, dynlib: "MFReadWrite.dll".}

pragma(lib, "mfreadwrite");
extern(Windows)
int MFCreateSourceReaderFromURL(
    const(wchar)* pwszURL,   // LPCWSTR
    void* pAttributes,   // IMFAttributes* optional
    void* ppSourceReader   // IMFSourceReader** out
);

ccall((:MFCreateSourceReaderFromURL, "MFReadWrite.dll"), stdcall, Int32,
      (Cwstring, Ptr{Cvoid}, Ptr{Cvoid}),
      pwszURL, pAttributes, ppSourceReader)
# pwszURL : LPCWSTR -> Cwstring
# pAttributes : IMFAttributes* optional -> Ptr{Cvoid}
# ppSourceReader : IMFSourceReader** 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 MFCreateSourceReaderFromURL(
    const uint16_t* pwszURL,
    void* pAttributes,
    void* ppSourceReader);
]]
local mfreadwrite = ffi.load("mfreadwrite")
-- mfreadwrite.MFCreateSourceReaderFromURL(pwszURL, pAttributes, ppSourceReader)
-- pwszURL : LPCWSTR
-- pAttributes : IMFAttributes* optional
-- ppSourceReader : IMFSourceReader** 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('MFReadWrite.dll');
const MFCreateSourceReaderFromURL = lib.func('__stdcall', 'MFCreateSourceReaderFromURL', 'int32_t', ['str16', 'void *', 'void *']);
// MFCreateSourceReaderFromURL(pwszURL, pAttributes, ppSourceReader)
// pwszURL : LPCWSTR -> 'str16'
// pAttributes : IMFAttributes* optional -> 'void *'
// ppSourceReader : IMFSourceReader** 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("MFReadWrite.dll", {
  MFCreateSourceReaderFromURL: { parameters: ["buffer", "pointer", "pointer"], result: "i32" },
});
// lib.symbols.MFCreateSourceReaderFromURL(pwszURL, pAttributes, ppSourceReader)
// pwszURL : LPCWSTR -> "buffer"
// pAttributes : IMFAttributes* optional -> "pointer"
// ppSourceReader : IMFSourceReader** 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 MFCreateSourceReaderFromURL(
    const uint16_t* pwszURL,
    void* pAttributes,
    void* ppSourceReader);
C, "MFReadWrite.dll");
// $ffi->MFCreateSourceReaderFromURL(pwszURL, pAttributes, ppSourceReader);
// pwszURL : LPCWSTR
// pAttributes : IMFAttributes* optional
// ppSourceReader : IMFSourceReader** 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 Mfreadwrite extends StdCallLibrary {
    Mfreadwrite INSTANCE = Native.load("mfreadwrite", Mfreadwrite.class);
    int MFCreateSourceReaderFromURL(
        WString pwszURL,   // LPCWSTR
        Pointer pAttributes,   // IMFAttributes* optional
        Pointer ppSourceReader   // IMFSourceReader** out
    );
}

@[Link("mfreadwrite")]
lib LibMFReadWrite
  fun MFCreateSourceReaderFromURL = MFCreateSourceReaderFromURL(
    pwszURL : UInt16*,   # LPCWSTR
    pAttributes : Void*,   # IMFAttributes* optional
    ppSourceReader : Void*   # IMFSourceReader** 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 MFCreateSourceReaderFromURLNative = Int32 Function(Pointer<Utf16>, Pointer<Void>, Pointer<Void>);
typedef MFCreateSourceReaderFromURLDart = int Function(Pointer<Utf16>, Pointer<Void>, Pointer<Void>);
final MFCreateSourceReaderFromURL = DynamicLibrary.open('MFReadWrite.dll')
    .lookupFunction<MFCreateSourceReaderFromURLNative, MFCreateSourceReaderFromURLDart>('MFCreateSourceReaderFromURL');
// pwszURL : LPCWSTR -> Pointer<Utf16>
// pAttributes : IMFAttributes* optional -> Pointer<Void>
// ppSourceReader : IMFSourceReader** out -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function MFCreateSourceReaderFromURL(
  pwszURL: PWideChar;   // LPCWSTR
  pAttributes: Pointer;   // IMFAttributes* optional
  ppSourceReader: Pointer   // IMFSourceReader** out
): Integer; stdcall;
  external 'MFReadWrite.dll' name 'MFCreateSourceReaderFromURL';

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

foreign import stdcall safe "MFCreateSourceReaderFromURL"
  c_MFCreateSourceReaderFromURL :: CWString -> Ptr () -> Ptr () -> IO Int32
-- pwszURL : LPCWSTR -> CWString
-- pAttributes : IMFAttributes* optional -> Ptr ()
-- ppSourceReader : IMFSourceReader** 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 mfcreatesourcereaderfromurl =
  foreign "MFCreateSourceReaderFromURL"
    ((ptr uint16_t) @-> (ptr void) @-> (ptr void) @-> returning int32_t)
(* pwszURL : LPCWSTR -> (ptr uint16_t) *)
(* pAttributes : IMFAttributes* optional -> (ptr void) *)
(* ppSourceReader : IMFSourceReader** 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 mfreadwrite (t "MFReadWrite.dll"))
(cffi:use-foreign-library mfreadwrite)

(cffi:defcfun ("MFCreateSourceReaderFromURL" mfcreate-source-reader-from-url :convention :stdcall) :int32
  (pwsz-url (:string :encoding :utf-16le))   ; LPCWSTR
  (p-attributes :pointer)   ; IMFAttributes* optional
  (pp-source-reader :pointer))   ; IMFSourceReader** out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $MFCreateSourceReaderFromURL = Win32::API::More->new('MFReadWrite',
    'int MFCreateSourceReaderFromURL(LPCWSTR pwszURL, LPVOID pAttributes, LPVOID ppSourceReader)');
# my $ret = $MFCreateSourceReaderFromURL->Call($pwszURL, $pAttributes, $ppSourceReader);
# pwszURL : LPCWSTR -> LPCWSTR
# pAttributes : IMFAttributes* optional -> LPVOID
# ppSourceReader : IMFSourceReader** out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。