MFCreateMediaBufferFromMediaType

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

HRESULT MFCreateMediaBufferFromMediaType(
    IMFMediaType* pMediaType,
    LONGLONG llDuration,
    DWORD dwMinLength,
    DWORD dwMinAlignment,
    IMFMediaBuffer** ppBuffer
);

<DllImport("MFPlat.dll", ExactSpelling:=True)>
Public Shared Function MFCreateMediaBufferFromMediaType(
    pMediaType As IntPtr,   ' IMFMediaType*
    llDuration As Long,   ' LONGLONG
    dwMinLength As UInteger,   ' DWORD
    dwMinAlignment As UInteger,   ' DWORD
    ppBuffer As IntPtr   ' IMFMediaBuffer** out
) As Integer
End Function

' pMediaType : IMFMediaType*
' llDuration : LONGLONG
' dwMinLength : DWORD
' dwMinAlignment : DWORD
' ppBuffer : IMFMediaBuffer** out
Declare PtrSafe Function MFCreateMediaBufferFromMediaType Lib "mfplat" ( _
    ByVal pMediaType As LongPtr, _
    ByVal llDuration As LongLong, _
    ByVal dwMinLength As Long, _
    ByVal dwMinAlignment 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

MFCreateMediaBufferFromMediaType = ctypes.windll.mfplat.MFCreateMediaBufferFromMediaType
MFCreateMediaBufferFromMediaType.restype = ctypes.c_int
MFCreateMediaBufferFromMediaType.argtypes = [
    ctypes.c_void_p,  # pMediaType : IMFMediaType*
    ctypes.c_longlong,  # llDuration : LONGLONG
    wintypes.DWORD,  # dwMinLength : DWORD
    wintypes.DWORD,  # dwMinAlignment : DWORD
    ctypes.c_void_p,  # ppBuffer : IMFMediaBuffer** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('MFPlat.dll')
MFCreateMediaBufferFromMediaType = Fiddle::Function.new(
  lib['MFCreateMediaBufferFromMediaType'],
  [
    Fiddle::TYPE_VOIDP,  # pMediaType : IMFMediaType*
    Fiddle::TYPE_LONG_LONG,  # llDuration : LONGLONG
    -Fiddle::TYPE_INT,  # dwMinLength : DWORD
    -Fiddle::TYPE_INT,  # dwMinAlignment : DWORD
    Fiddle::TYPE_VOIDP,  # ppBuffer : IMFMediaBuffer** out
  ],
  Fiddle::TYPE_INT)

#[link(name = "mfplat")]
extern "system" {
    fn MFCreateMediaBufferFromMediaType(
        pMediaType: *mut core::ffi::c_void,  // IMFMediaType*
        llDuration: i64,  // LONGLONG
        dwMinLength: u32,  // DWORD
        dwMinAlignment: 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 MFCreateMediaBufferFromMediaType(IntPtr pMediaType, long llDuration, uint dwMinLength, uint dwMinAlignment, IntPtr ppBuffer);
"@
$api = Add-Type -MemberDefinition $sig -Name 'MFPlat_MFCreateMediaBufferFromMediaType' -Namespace Win32 -PassThru
# $api::MFCreateMediaBufferFromMediaType(pMediaType, llDuration, dwMinLength, dwMinAlignment, ppBuffer)

#uselib "MFPlat.dll"
#func global MFCreateMediaBufferFromMediaType "MFCreateMediaBufferFromMediaType" sptr, sptr, sptr, sptr, sptr
; MFCreateMediaBufferFromMediaType pMediaType, llDuration, dwMinLength, dwMinAlignment, ppBuffer   ; 戻り値は stat
; pMediaType : IMFMediaType* -> "sptr"
; llDuration : LONGLONG -> "sptr"
; dwMinLength : DWORD -> "sptr"
; dwMinAlignment : DWORD -> "sptr"
; ppBuffer : IMFMediaBuffer** out -> "sptr"
; ※HSP3.7は int64 引数(64bit値渡し)に非対応です。
; ※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 MFCreateMediaBufferFromMediaType "MFCreateMediaBufferFromMediaType" sptr, int64, int, int, sptr
; res = MFCreateMediaBufferFromMediaType(pMediaType, llDuration, dwMinLength, dwMinAlignment, ppBuffer)
; pMediaType : IMFMediaType* -> "sptr"
; llDuration : LONGLONG -> "int64"
; dwMinLength : DWORD -> "int"
; dwMinAlignment : DWORD -> "int"
; ppBuffer : IMFMediaBuffer** out -> "sptr"
; ※int64 引数の DLL 値渡しは x64 ランタイム(hsp3_64)のみ対応(x86 は未対応)。

; HRESULT MFCreateMediaBufferFromMediaType(IMFMediaType* pMediaType, LONGLONG llDuration, DWORD dwMinLength, DWORD dwMinAlignment, IMFMediaBuffer** ppBuffer)
#uselib "MFPlat.dll"
#cfunc global MFCreateMediaBufferFromMediaType "MFCreateMediaBufferFromMediaType" intptr, int64, int, int, intptr
; res = MFCreateMediaBufferFromMediaType(pMediaType, llDuration, dwMinLength, dwMinAlignment, ppBuffer)
; pMediaType : IMFMediaType* -> "intptr"
; llDuration : LONGLONG -> "int64"
; dwMinLength : DWORD -> "int"
; dwMinAlignment : DWORD -> "int"
; ppBuffer : IMFMediaBuffer** out -> "intptr"

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

var (
	mfplat = windows.NewLazySystemDLL("MFPlat.dll")
	procMFCreateMediaBufferFromMediaType = mfplat.NewProc("MFCreateMediaBufferFromMediaType")
)

// pMediaType (IMFMediaType*), llDuration (LONGLONG), dwMinLength (DWORD), dwMinAlignment (DWORD), ppBuffer (IMFMediaBuffer** out)
r1, _, err := procMFCreateMediaBufferFromMediaType.Call(
	uintptr(pMediaType),
	uintptr(llDuration),
	uintptr(dwMinLength),
	uintptr(dwMinAlignment),
	uintptr(ppBuffer),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function MFCreateMediaBufferFromMediaType(
  pMediaType: Pointer;   // IMFMediaType*
  llDuration: Int64;   // LONGLONG
  dwMinLength: DWORD;   // DWORD
  dwMinAlignment: DWORD;   // DWORD
  ppBuffer: Pointer   // IMFMediaBuffer** out
): Integer; stdcall;
  external 'MFPlat.dll' name 'MFCreateMediaBufferFromMediaType';

result := DllCall("MFPlat\MFCreateMediaBufferFromMediaType"
    , "Ptr", pMediaType   ; IMFMediaType*
    , "Int64", llDuration   ; LONGLONG
    , "UInt", dwMinLength   ; DWORD
    , "UInt", dwMinAlignment   ; DWORD
    , "Ptr", ppBuffer   ; IMFMediaBuffer** out
    , "Int")   ; return: HRESULT

●MFCreateMediaBufferFromMediaType(pMediaType, llDuration, dwMinLength, dwMinAlignment, ppBuffer) = DLL("MFPlat.dll", "int MFCreateMediaBufferFromMediaType(void*, int64, dword, dword, void*)")
# 呼び出し: MFCreateMediaBufferFromMediaType(pMediaType, llDuration, dwMinLength, dwMinAlignment, ppBuffer)
# pMediaType : IMFMediaType* -> "void*"
# llDuration : LONGLONG -> "int64"
# dwMinLength : DWORD -> "dword"
# dwMinAlignment : 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)。