ホーム › Media.MediaFoundation › MFInitAttributesFromBlob

MFInitAttributesFromBlob

関数

BLOBデータから属性ストアの内容を復元する。

DLLMFPlat.dll呼出規約winapi対応OSWindows Vista 以降

シグネチャ

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

HRESULT MFInitAttributesFromBlob(
    IMFAttributes* pAttributes,
    const BYTE* pBuf,
    DWORD cbBufSize
);

パラメーター

名前	型	方向
pAttributes	IMFAttributes*	in
pBuf	BYTE*	in
cbBufSize	DWORD	in

戻り値の型: HRESULT

各言語での呼び出し定義

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

HRESULT MFInitAttributesFromBlob(
    IMFAttributes* pAttributes,
    const BYTE* pBuf,
    DWORD cbBufSize
);

[DllImport("MFPlat.dll", ExactSpelling = true)]
static extern int MFInitAttributesFromBlob(
    IntPtr pAttributes,   // IMFAttributes*
    IntPtr pBuf,   // BYTE*
    uint cbBufSize   // DWORD
);

<DllImport("MFPlat.dll", ExactSpelling:=True)>
Public Shared Function MFInitAttributesFromBlob(
    pAttributes As IntPtr,   ' IMFAttributes*
    pBuf As IntPtr,   ' BYTE*
    cbBufSize As UInteger   ' DWORD
) As Integer
End Function

' pAttributes : IMFAttributes*
' pBuf : BYTE*
' cbBufSize : DWORD
Declare PtrSafe Function MFInitAttributesFromBlob Lib "mfplat" ( _
    ByVal pAttributes As LongPtr, _
    ByVal pBuf As LongPtr, _
    ByVal cbBufSize 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

MFInitAttributesFromBlob = ctypes.windll.mfplat.MFInitAttributesFromBlob
MFInitAttributesFromBlob.restype = ctypes.c_int
MFInitAttributesFromBlob.argtypes = [
    ctypes.c_void_p,  # pAttributes : IMFAttributes*
    ctypes.POINTER(ctypes.c_ubyte),  # pBuf : BYTE*
    wintypes.DWORD,  # cbBufSize : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('MFPlat.dll')
MFInitAttributesFromBlob = Fiddle::Function.new(
  lib['MFInitAttributesFromBlob'],
  [
    Fiddle::TYPE_VOIDP,  # pAttributes : IMFAttributes*
    Fiddle::TYPE_VOIDP,  # pBuf : BYTE*
    -Fiddle::TYPE_INT,  # cbBufSize : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "mfplat")]
extern "system" {
    fn MFInitAttributesFromBlob(
        pAttributes: *mut core::ffi::c_void,  // IMFAttributes*
        pBuf: *const u8,  // BYTE*
        cbBufSize: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("MFPlat.dll")]
public static extern int MFInitAttributesFromBlob(IntPtr pAttributes, IntPtr pBuf, uint cbBufSize);
"@
$api = Add-Type -MemberDefinition $sig -Name 'MFPlat_MFInitAttributesFromBlob' -Namespace Win32 -PassThru
# $api::MFInitAttributesFromBlob(pAttributes, pBuf, cbBufSize)

#uselib "MFPlat.dll"
#func global MFInitAttributesFromBlob "MFInitAttributesFromBlob" sptr, sptr, sptr
; MFInitAttributesFromBlob pAttributes, varptr(pBuf), cbBufSize   ; 戻り値は stat
; pAttributes : IMFAttributes* -> "sptr"
; pBuf : BYTE* -> "sptr"
; cbBufSize : 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。

出力引数:

#uselib "MFPlat.dll"
#cfunc global MFInitAttributesFromBlob "MFInitAttributesFromBlob" sptr, var, int
; res = MFInitAttributesFromBlob(pAttributes, pBuf, cbBufSize)
; pAttributes : IMFAttributes* -> "sptr"
; pBuf : BYTE* -> "var"
; cbBufSize : 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。#uselib "MFPlat.dll"
#cfunc global MFInitAttributesFromBlob "MFInitAttributesFromBlob" sptr, sptr, int
; res = MFInitAttributesFromBlob(pAttributes, varptr(pBuf), cbBufSize)
; pAttributes : IMFAttributes* -> "sptr"
; pBuf : BYTE* -> "sptr"
; cbBufSize : DWORD -> "int"
; ※出力/バッファ引数はポインタ方式(token=sptr / 呼び出しは varptr(変数))。

出力引数:

; HRESULT MFInitAttributesFromBlob(IMFAttributes* pAttributes, BYTE* pBuf, DWORD cbBufSize)
#uselib "MFPlat.dll"
#cfunc global MFInitAttributesFromBlob "MFInitAttributesFromBlob" intptr, var, int
; res = MFInitAttributesFromBlob(pAttributes, pBuf, cbBufSize)
; pAttributes : IMFAttributes* -> "intptr"
; pBuf : BYTE* -> "var"
; cbBufSize : 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 MFInitAttributesFromBlob(IMFAttributes* pAttributes, BYTE* pBuf, DWORD cbBufSize)
#uselib "MFPlat.dll"
#cfunc global MFInitAttributesFromBlob "MFInitAttributesFromBlob" intptr, intptr, int
; res = MFInitAttributesFromBlob(pAttributes, varptr(pBuf), cbBufSize)
; pAttributes : IMFAttributes* -> "intptr"
; pBuf : BYTE* -> "intptr"
; cbBufSize : DWORD -> "int"
; ※出力/バッファ引数はポインタ方式(token=intptr / 呼び出しは varptr(変数))。

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

var (
	mfplat = windows.NewLazySystemDLL("MFPlat.dll")
	procMFInitAttributesFromBlob = mfplat.NewProc("MFInitAttributesFromBlob")
)

// pAttributes (IMFAttributes*), pBuf (BYTE*), cbBufSize (DWORD)
r1, _, err := procMFInitAttributesFromBlob.Call(
	uintptr(pAttributes),
	uintptr(pBuf),
	uintptr(cbBufSize),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function MFInitAttributesFromBlob(
  pAttributes: Pointer;   // IMFAttributes*
  pBuf: Pointer;   // BYTE*
  cbBufSize: DWORD   // DWORD
): Integer; stdcall;
  external 'MFPlat.dll' name 'MFInitAttributesFromBlob';

result := DllCall("MFPlat\MFInitAttributesFromBlob"
    , "Ptr", pAttributes   ; IMFAttributes*
    , "Ptr", pBuf   ; BYTE*
    , "UInt", cbBufSize   ; DWORD
    , "Int")   ; return: HRESULT

●MFInitAttributesFromBlob(pAttributes, pBuf, cbBufSize) = DLL("MFPlat.dll", "int MFInitAttributesFromBlob(void*, void*, dword)")
# 呼び出し: MFInitAttributesFromBlob(pAttributes, pBuf, cbBufSize)
# pAttributes : IMFAttributes* -> "void*"
# pBuf : BYTE* -> "void*"
# cbBufSize : 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)。