MFCreateSourceReaderFromMediaSource

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

HRESULT MFCreateSourceReaderFromMediaSource(
    IMFMediaSource* pMediaSource,
    IMFAttributes* pAttributes,   // optional
    IMFSourceReader** ppSourceReader
);

<DllImport("MFReadWrite.dll", ExactSpelling:=True)>
Public Shared Function MFCreateSourceReaderFromMediaSource(
    pMediaSource As IntPtr,   ' IMFMediaSource*
    pAttributes As IntPtr,   ' IMFAttributes* optional
    ppSourceReader As IntPtr   ' IMFSourceReader** out
) As Integer
End Function

' pMediaSource : IMFMediaSource*
' pAttributes : IMFAttributes* optional
' ppSourceReader : IMFSourceReader** out
Declare PtrSafe Function MFCreateSourceReaderFromMediaSource Lib "mfreadwrite" ( _
    ByVal pMediaSource 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

MFCreateSourceReaderFromMediaSource = ctypes.windll.mfreadwrite.MFCreateSourceReaderFromMediaSource
MFCreateSourceReaderFromMediaSource.restype = ctypes.c_int
MFCreateSourceReaderFromMediaSource.argtypes = [
    ctypes.c_void_p,  # pMediaSource : IMFMediaSource*
    ctypes.c_void_p,  # pAttributes : IMFAttributes* optional
    ctypes.c_void_p,  # ppSourceReader : IMFSourceReader** out
]

require 'fiddle'
require 'fiddle/import'

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

#[link(name = "mfreadwrite")]
extern "system" {
    fn MFCreateSourceReaderFromMediaSource(
        pMediaSource: *mut core::ffi::c_void,  // IMFMediaSource*
        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 MFCreateSourceReaderFromMediaSource(IntPtr pMediaSource, IntPtr pAttributes, IntPtr ppSourceReader);
"@
$api = Add-Type -MemberDefinition $sig -Name 'MFReadWrite_MFCreateSourceReaderFromMediaSource' -Namespace Win32 -PassThru
# $api::MFCreateSourceReaderFromMediaSource(pMediaSource, pAttributes, ppSourceReader)

#uselib "MFReadWrite.dll"
#func global MFCreateSourceReaderFromMediaSource "MFCreateSourceReaderFromMediaSource" sptr, sptr, sptr
; MFCreateSourceReaderFromMediaSource pMediaSource, pAttributes, ppSourceReader   ; 戻り値は stat
; pMediaSource : IMFMediaSource* -> "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 MFCreateSourceReaderFromMediaSource "MFCreateSourceReaderFromMediaSource" sptr, sptr, sptr
; res = MFCreateSourceReaderFromMediaSource(pMediaSource, pAttributes, ppSourceReader)
; pMediaSource : IMFMediaSource* -> "sptr"
; pAttributes : IMFAttributes* optional -> "sptr"
; ppSourceReader : IMFSourceReader** out -> "sptr"

; HRESULT MFCreateSourceReaderFromMediaSource(IMFMediaSource* pMediaSource, IMFAttributes* pAttributes, IMFSourceReader** ppSourceReader)
#uselib "MFReadWrite.dll"
#cfunc global MFCreateSourceReaderFromMediaSource "MFCreateSourceReaderFromMediaSource" intptr, intptr, intptr
; res = MFCreateSourceReaderFromMediaSource(pMediaSource, pAttributes, ppSourceReader)
; pMediaSource : IMFMediaSource* -> "intptr"
; pAttributes : IMFAttributes* optional -> "intptr"
; ppSourceReader : IMFSourceReader** out -> "intptr"

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

var (
	mfreadwrite = windows.NewLazySystemDLL("MFReadWrite.dll")
	procMFCreateSourceReaderFromMediaSource = mfreadwrite.NewProc("MFCreateSourceReaderFromMediaSource")
)

// pMediaSource (IMFMediaSource*), pAttributes (IMFAttributes* optional), ppSourceReader (IMFSourceReader** out)
r1, _, err := procMFCreateSourceReaderFromMediaSource.Call(
	uintptr(pMediaSource),
	uintptr(pAttributes),
	uintptr(ppSourceReader),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function MFCreateSourceReaderFromMediaSource(
  pMediaSource: Pointer;   // IMFMediaSource*
  pAttributes: Pointer;   // IMFAttributes* optional
  ppSourceReader: Pointer   // IMFSourceReader** out
): Integer; stdcall;
  external 'MFReadWrite.dll' name 'MFCreateSourceReaderFromMediaSource';

result := DllCall("MFReadWrite\MFCreateSourceReaderFromMediaSource"
    , "Ptr", pMediaSource   ; IMFMediaSource*
    , "Ptr", pAttributes   ; IMFAttributes* optional
    , "Ptr", ppSourceReader   ; IMFSourceReader** out
    , "Int")   ; return: HRESULT

●MFCreateSourceReaderFromMediaSource(pMediaSource, pAttributes, ppSourceReader) = DLL("MFReadWrite.dll", "int MFCreateSourceReaderFromMediaSource(void*, void*, void*)")
# 呼び出し: MFCreateSourceReaderFromMediaSource(pMediaSource, pAttributes, ppSourceReader)
# pMediaSource : IMFMediaSource* -> "void*"
# 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)。