MFConvertFromFP16Array

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

HRESULT MFConvertFromFP16Array(
    FLOAT* pDest,
    const WORD* pSrc,
    DWORD dwCount
);

<DllImport("MFPlat.dll", ExactSpelling:=True)>
Public Shared Function MFConvertFromFP16Array(
    <Out> ByRef pDest As Single,   ' FLOAT* out
    ByRef pSrc As UShort,   ' WORD*
    dwCount As UInteger   ' DWORD
) As Integer
End Function

' pDest : FLOAT* out
' pSrc : WORD*
' dwCount : DWORD
Declare PtrSafe Function MFConvertFromFP16Array Lib "mfplat" ( _
    ByRef pDest As Single, _
    ByRef pSrc As Integer, _
    ByVal dwCount As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

MFConvertFromFP16Array = ctypes.windll.mfplat.MFConvertFromFP16Array
MFConvertFromFP16Array.restype = ctypes.c_int
MFConvertFromFP16Array.argtypes = [
    ctypes.POINTER(ctypes.c_float),  # pDest : FLOAT* out
    ctypes.POINTER(ctypes.c_ushort),  # pSrc : WORD*
    wintypes.DWORD,  # dwCount : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('MFPlat.dll')
MFConvertFromFP16Array = Fiddle::Function.new(
  lib['MFConvertFromFP16Array'],
  [
    Fiddle::TYPE_VOIDP,  # pDest : FLOAT* out
    Fiddle::TYPE_VOIDP,  # pSrc : WORD*
    -Fiddle::TYPE_INT,  # dwCount : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "mfplat")]
extern "system" {
    fn MFConvertFromFP16Array(
        pDest: *mut f32,  // FLOAT* out
        pSrc: *const u16,  // WORD*
        dwCount: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("MFPlat.dll")]
public static extern int MFConvertFromFP16Array(out float pDest, ref ushort pSrc, uint dwCount);
"@
$api = Add-Type -MemberDefinition $sig -Name 'MFPlat_MFConvertFromFP16Array' -Namespace Win32 -PassThru
# $api::MFConvertFromFP16Array(pDest, pSrc, dwCount)

#uselib "MFPlat.dll"
#func global MFConvertFromFP16Array "MFConvertFromFP16Array" sptr, sptr, sptr
; MFConvertFromFP16Array varptr(pDest), varptr(pSrc), dwCount   ; 戻り値は stat
; pDest : FLOAT* out -> "sptr"
; pSrc : WORD* -> "sptr"
; dwCount : DWORD -> "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 MFConvertFromFP16Array "MFConvertFromFP16Array" var, var, int
; res = MFConvertFromFP16Array(pDest, pSrc, dwCount)
; pDest : FLOAT* out -> "var"
; pSrc : WORD* -> "var"
; dwCount : DWORD -> "int"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

; HRESULT MFConvertFromFP16Array(FLOAT* pDest, WORD* pSrc, DWORD dwCount)
#uselib "MFPlat.dll"
#cfunc global MFConvertFromFP16Array "MFConvertFromFP16Array" var, var, int
; res = MFConvertFromFP16Array(pDest, pSrc, dwCount)
; pDest : FLOAT* out -> "var"
; pSrc : WORD* -> "var"
; dwCount : DWORD -> "int"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

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

var (
	mfplat = windows.NewLazySystemDLL("MFPlat.dll")
	procMFConvertFromFP16Array = mfplat.NewProc("MFConvertFromFP16Array")
)

// pDest (FLOAT* out), pSrc (WORD*), dwCount (DWORD)
r1, _, err := procMFConvertFromFP16Array.Call(
	uintptr(pDest),
	uintptr(pSrc),
	uintptr(dwCount),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function MFConvertFromFP16Array(
  pDest: Pointer;   // FLOAT* out
  pSrc: Pointer;   // WORD*
  dwCount: DWORD   // DWORD
): Integer; stdcall;
  external 'MFPlat.dll' name 'MFConvertFromFP16Array';

result := DllCall("MFPlat\MFConvertFromFP16Array"
    , "Ptr", pDest   ; FLOAT* out
    , "Ptr", pSrc   ; WORD*
    , "UInt", dwCount   ; DWORD
    , "Int")   ; return: HRESULT

●MFConvertFromFP16Array(pDest, pSrc, dwCount) = DLL("MFPlat.dll", "int MFConvertFromFP16Array(void*, void*, dword)")
# 呼び出し: MFConvertFromFP16Array(pDest, pSrc, dwCount)
# pDest : FLOAT* out -> "void*"
# pSrc : WORD* -> "void*"
# dwCount : DWORD -> "dword"
# 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)。