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GetDeviceID

関数

既定のサウンドデバイス指定子から実デバイスのGUIDを取得する。

DLLDSOUND.dll呼出規約winapi

シグネチャ

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

HRESULT GetDeviceID(
    const GUID* pGuidSrc,   // optional
    GUID* pGuidDest
);

パラメーター

名前	型	方向
pGuidSrc	GUID*	inoptional
pGuidDest	GUID*	out

戻り値の型: HRESULT

各言語での呼び出し定義

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

HRESULT GetDeviceID(
    const GUID* pGuidSrc,   // optional
    GUID* pGuidDest
);

[DllImport("DSOUND.dll", ExactSpelling = true)]
static extern int GetDeviceID(
    IntPtr pGuidSrc,   // GUID* optional
    out Guid pGuidDest   // GUID* out
);

<DllImport("DSOUND.dll", ExactSpelling:=True)>
Public Shared Function GetDeviceID(
    pGuidSrc As IntPtr,   ' GUID* optional
    <Out> ByRef pGuidDest As Guid   ' GUID* out
) As Integer
End Function

' pGuidSrc : GUID* optional
' pGuidDest : GUID* out
Declare PtrSafe Function GetDeviceID Lib "dsound" ( _
    ByVal pGuidSrc As LongPtr, _
    ByVal pGuidDest 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

GetDeviceID = ctypes.windll.dsound.GetDeviceID
GetDeviceID.restype = ctypes.c_int
GetDeviceID.argtypes = [
    ctypes.c_void_p,  # pGuidSrc : GUID* optional
    ctypes.c_void_p,  # pGuidDest : GUID* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('DSOUND.dll')
GetDeviceID = Fiddle::Function.new(
  lib['GetDeviceID'],
  [
    Fiddle::TYPE_VOIDP,  # pGuidSrc : GUID* optional
    Fiddle::TYPE_VOIDP,  # pGuidDest : GUID* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "dsound")]
extern "system" {
    fn GetDeviceID(
        pGuidSrc: *const GUID,  // GUID* optional
        pGuidDest: *mut GUID  // GUID* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("DSOUND.dll")]
public static extern int GetDeviceID(IntPtr pGuidSrc, out Guid pGuidDest);
"@
$api = Add-Type -MemberDefinition $sig -Name 'DSOUND_GetDeviceID' -Namespace Win32 -PassThru
# $api::GetDeviceID(pGuidSrc, pGuidDest)

#uselib "DSOUND.dll"
#func global GetDeviceID "GetDeviceID" sptr, sptr
; GetDeviceID varptr(pGuidSrc), varptr(pGuidDest)   ; 戻り値は stat
; pGuidSrc : GUID* optional -> "sptr"
; pGuidDest : GUID* 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。

出力引数:

#uselib "DSOUND.dll"
#cfunc global GetDeviceID "GetDeviceID" var, var
; res = GetDeviceID(pGuidSrc, pGuidDest)
; pGuidSrc : GUID* optional -> "var"
; pGuidDest : GUID* out -> "var"
; ※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 "DSOUND.dll"
#cfunc global GetDeviceID "GetDeviceID" sptr, sptr
; res = GetDeviceID(varptr(pGuidSrc), varptr(pGuidDest))
; pGuidSrc : GUID* optional -> "sptr"
; pGuidDest : GUID* out -> "sptr"
; ※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 GetDeviceID(GUID* pGuidSrc, GUID* pGuidDest)
#uselib "DSOUND.dll"
#cfunc global GetDeviceID "GetDeviceID" var, var
; res = GetDeviceID(pGuidSrc, pGuidDest)
; pGuidSrc : GUID* optional -> "var"
; pGuidDest : GUID* out -> "var"
; ※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 GetDeviceID(GUID* pGuidSrc, GUID* pGuidDest)
#uselib "DSOUND.dll"
#cfunc global GetDeviceID "GetDeviceID" intptr, intptr
; res = GetDeviceID(varptr(pGuidSrc), varptr(pGuidDest))
; pGuidSrc : GUID* optional -> "intptr"
; pGuidDest : GUID* out -> "intptr"
; ※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 (
	dsound = windows.NewLazySystemDLL("DSOUND.dll")
	procGetDeviceID = dsound.NewProc("GetDeviceID")
)

// pGuidSrc (GUID* optional), pGuidDest (GUID* out)
r1, _, err := procGetDeviceID.Call(
	uintptr(pGuidSrc),
	uintptr(pGuidDest),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function GetDeviceID(
  pGuidSrc: PGUID;   // GUID* optional
  pGuidDest: PGUID   // GUID* out
): Integer; stdcall;
  external 'DSOUND.dll' name 'GetDeviceID';

result := DllCall("DSOUND\GetDeviceID"
    , "Ptr", pGuidSrc   ; GUID* optional
    , "Ptr", pGuidDest   ; GUID* out
    , "Int")   ; return: HRESULT

●GetDeviceID(pGuidSrc, pGuidDest) = DLL("DSOUND.dll", "int GetDeviceID(void*, void*)")
# 呼び出し: GetDeviceID(pGuidSrc, pGuidDest)
# pGuidSrc : GUID* optional -> "void*"
# pGuidDest : GUID* 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)。