Win32 API 日本語リファレンス
ホーム › Media.Audio › WAVEFORMATEXTENSIBLE

WAVEFORMATEXTENSIBLE

構造体
📘 Microsoft Learn (日本語) · English
サイズx64: 40 バイト / x86: 40 バイトパッキング1

サイズ=各フィールドのバイト数(x64/x86 で異なる場合は x64/x86 と併記)。x64/x86 列=フィールドのバイトオフセット(HSPで dupptr / lpoke / wpoke 等に使用)。

フィールド

フィールド型サイズx64x86説明
FormatWAVEFORMATEX18+0+0基本となる波形フォーマット情報(WAVEFORMATEX)。wFormatTagはWAVE_FORMAT_EXTENSIBLE。
Samples_Samples_e__Union2+18+18サンプルあたりの有効ビット数等を保持する共用体。
dwChannelMaskDWORD4+20+20各スピーカー位置への割り当てを示すチャンネルマスク(SPEAKER_*)。
SubFormatGUID16+24+24実際のデータ形式を識別するサブフォーマットGUID(KSDATAFORMAT_SUBTYPE_*)。

共用体: _Samples_e__Union x64 2B / x86 2B

フィールド型サイズx64x86
wValidBitsPerSampleWORD2+0+0
wSamplesPerBlockWORD2+0+0
wReservedWORD2+0+0

各言語での定義

#include <windows.h>

// WAVEFORMATEX  (x64 18 / x86 18 バイト)
#pragma pack(push, 1)
typedef struct WAVEFORMATEX {
    WORD wFormatTag;
    WORD nChannels;
    DWORD nSamplesPerSec;
    DWORD nAvgBytesPerSec;
    WORD nBlockAlign;
    WORD wBitsPerSample;
    WORD cbSize;
} WAVEFORMATEX;
#pragma pack(pop)

// WAVEFORMATEXTENSIBLE  (x64 40 / x86 40 バイト)
#pragma pack(push, 1)
typedef struct WAVEFORMATEXTENSIBLE {
    WAVEFORMATEX Format;
    _Samples_e__Union Samples;
    DWORD dwChannelMask;
    GUID SubFormat;
} WAVEFORMATEXTENSIBLE;
#pragma pack(pop)
using System;
using System.Runtime.InteropServices;

[StructLayout(LayoutKind.Sequential, Pack = 1, CharSet = CharSet.Unicode)]
public struct WAVEFORMATEX
{
    public ushort wFormatTag;
    public ushort nChannels;
    public uint nSamplesPerSec;
    public uint nAvgBytesPerSec;
    public ushort nBlockAlign;
    public ushort wBitsPerSample;
    public ushort cbSize;
}

[StructLayout(LayoutKind.Sequential, Pack = 1, CharSet = CharSet.Unicode)]
public struct WAVEFORMATEXTENSIBLE
{
    public WAVEFORMATEX Format;
    public _Samples_e__Union Samples;
    public uint dwChannelMask;
    public Guid SubFormat;
}
Imports System.Runtime.InteropServices

<StructLayout(LayoutKind.Sequential, Pack:=1, CharSet:=CharSet.Unicode)>
Public Structure WAVEFORMATEX
    Public wFormatTag As UShort
    Public nChannels As UShort
    Public nSamplesPerSec As UInteger
    Public nAvgBytesPerSec As UInteger
    Public nBlockAlign As UShort
    Public wBitsPerSample As UShort
    Public cbSize As UShort
End Structure

<StructLayout(LayoutKind.Sequential, Pack:=1, CharSet:=CharSet.Unicode)>
Public Structure WAVEFORMATEXTENSIBLE
    Public Format As WAVEFORMATEX
    Public Samples As _Samples_e__Union
    Public dwChannelMask As UInteger
    Public SubFormat As Guid
End Structure
import ctypes
from ctypes import wintypes

class WAVEFORMATEX(ctypes.Structure):
    _pack_ = 1
    _fields_ = [
        ("wFormatTag", ctypes.c_ushort),
        ("nChannels", ctypes.c_ushort),
        ("nSamplesPerSec", wintypes.DWORD),
        ("nAvgBytesPerSec", wintypes.DWORD),
        ("nBlockAlign", ctypes.c_ushort),
        ("wBitsPerSample", ctypes.c_ushort),
        ("cbSize", ctypes.c_ushort),
    ]

class WAVEFORMATEXTENSIBLE(ctypes.Structure):
    _pack_ = 1
    _fields_ = [
        ("Format", WAVEFORMATEX),
        ("Samples", _Samples_e__Union),
        ("dwChannelMask", wintypes.DWORD),
        ("SubFormat", GUID),
    ]
#[repr(C, packed(1))]
pub struct WAVEFORMATEX {
    pub wFormatTag: u16,
    pub nChannels: u16,
    pub nSamplesPerSec: u32,
    pub nAvgBytesPerSec: u32,
    pub nBlockAlign: u16,
    pub wBitsPerSample: u16,
    pub cbSize: u16,
}

#[repr(C, packed(1))]
pub struct WAVEFORMATEXTENSIBLE {
    pub Format: WAVEFORMATEX,
    pub Samples: _Samples_e__Union,
    pub dwChannelMask: u32,
    pub SubFormat: GUID,
}
import "golang.org/x/sys/windows"

type WAVEFORMATEX struct {
	wFormatTag uint16
	nChannels uint16
	nSamplesPerSec uint32
	nAvgBytesPerSec uint32
	nBlockAlign uint16
	wBitsPerSample uint16
	cbSize uint16
}

type WAVEFORMATEXTENSIBLE struct {
	Format WAVEFORMATEX
	Samples _Samples_e__Union
	dwChannelMask uint32
	SubFormat windows.GUID
}
type
  WAVEFORMATEX = packed record
    wFormatTag: Word;
    nChannels: Word;
    nSamplesPerSec: DWORD;
    nAvgBytesPerSec: DWORD;
    nBlockAlign: Word;
    wBitsPerSample: Word;
    cbSize: Word;
  end;

  WAVEFORMATEXTENSIBLE = packed record
    Format: WAVEFORMATEX;
    Samples: _Samples_e__Union;
    dwChannelMask: DWORD;
    SubFormat: TGUID;
  end;
const WAVEFORMATEX = extern struct {
    wFormatTag: u16,
    nChannels: u16,
    nSamplesPerSec: u32,
    nAvgBytesPerSec: u32,
    nBlockAlign: u16,
    wBitsPerSample: u16,
    cbSize: u16,
};

const WAVEFORMATEXTENSIBLE = extern struct {
    Format: WAVEFORMATEX,
    Samples: _Samples_e__Union,
    dwChannelMask: u32,
    SubFormat: GUID,
};
type
  WAVEFORMATEX {.packed.} = object
    wFormatTag: uint16
    nChannels: uint16
    nSamplesPerSec: uint32
    nAvgBytesPerSec: uint32
    nBlockAlign: uint16
    wBitsPerSample: uint16
    cbSize: uint16

  WAVEFORMATEXTENSIBLE {.packed.} = object
    Format: WAVEFORMATEX
    Samples: _Samples_e__Union
    dwChannelMask: uint32
    SubFormat: GUID
align(1)
struct WAVEFORMATEX
{
    ushort wFormatTag;
    ushort nChannels;
    uint nSamplesPerSec;
    uint nAvgBytesPerSec;
    ushort nBlockAlign;
    ushort wBitsPerSample;
    ushort cbSize;
}

align(1)
struct WAVEFORMATEXTENSIBLE
{
    WAVEFORMATEX Format;
    _Samples_e__Union Samples;
    uint dwChannelMask;
    GUID SubFormat;
}

HSP用 定義

HSP3.7/3.8 は構造体機能が無いため4byte整数配列(dim)+peek/poke で操作(32/64bitでサイズ・位置が異なる場合はタブで分割)。IronHSP は NSTRUCT(#defstruct/stdim/->)で32/64bit共通。

; HSP3.7/3.8 は構造体機能が無いため、4byte整数の配列変数で操作します。(x64 レイアウト)
; WAVEFORMATEXTENSIBLE サイズ: 40 バイト(x64)
dim st, 10    ; 4byte整数×10(構造体サイズ 40 / 4 切り上げ)
; Format : WAVEFORMATEX (+0, 18byte)  varptr(st)+0 を基点に操作(18byte:入れ子/配列)
; Samples : _Samples_e__Union (+18, 2byte)  varptr(st)+18 を基点に操作(2byte:入れ子/配列)
; dwChannelMask : DWORD (+20, 4byte)  st.5 = 値  /  値 = st.5   (lpoke/lpeek も可)
; SubFormat : GUID (+24, 16byte)  varptr(st)+24 を基点に操作(16byte:入れ子/配列)
; ※4byte境界の整数は添字 st.N(N=オフセット/4)で読み書き可。それ以外は peek/poke 系を使用。
; IronHSP は NSTRUCT(構造体)をサポート。32bit/64bit どちらでも同じコードで動作します。
; ※GUID・入れ子構造体はデフォルト型でないため、依存する #defstruct を先に定義(下記に同梱)。
#defstruct global WAVEFORMATEX, pack=1
    #field short wFormatTag
    #field short nChannels
    #field int nSamplesPerSec
    #field int nAvgBytesPerSec
    #field short nBlockAlign
    #field short wBitsPerSample
    #field short cbSize
#endstruct

#defstruct global GUID, pack=1
    #field int Data1
    #field short Data2
    #field short Data3
    #field byte Data4 8
#endstruct

#defstruct global WAVEFORMATEXTENSIBLE, pack=1
    #field WAVEFORMATEX Format
    #field byte Samples 2
    #field int dwChannelMask
    #field GUID SubFormat
#endstruct

stdim st, WAVEFORMATEXTENSIBLE        ; NSTRUCT 変数を確保
st->dwChannelMask = 100
mes "dwChannelMask=" + st->dwChannelMask
; ※union フィールドは byte 列で確保(NSTRUCT は union 非対応)。必要に応じ手動でアクセス。