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264 lines
10 KiB
C
264 lines
10 KiB
C
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/***************************************************************************
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*
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* Copyright (c) Microsoft Corporation. All rights reserved.
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*
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* File: audiodefs.h
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* Content: Basic constants and data types for audio work.
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*
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* Remarks: This header file defines all of the audio format constants and
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* structures required for XAudio2 and XACT work. Providing these
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* in a single location avoids certain dependency problems in the
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* legacy audio headers (mmreg.h, mmsystem.h, ksmedia.h).
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*
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* NOTE: Including the legacy headers after this one may cause a
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* compilation error, because they define some of the same types
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* defined here without preprocessor guards to avoid multiple
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* definitions. If a source file needs one of the old headers,
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* it must include it before including audiodefs.h.
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*
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***************************************************************************/
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#ifndef __AUDIODEFS_INCLUDED__
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#define __AUDIODEFS_INCLUDED__
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#include <windef.h> // For WORD, DWORD, etc.
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#pragma pack(push, 1) // Pack structures to 1-byte boundaries
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/**************************************************************************
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*
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* WAVEFORMATEX: Base structure for many audio formats. Format-specific
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* extensions can be defined for particular formats by using a non-zero
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* cbSize value and adding extra fields to the end of this structure.
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*
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***************************************************************************/
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#ifndef _WAVEFORMATEX_
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#define _WAVEFORMATEX_
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typedef struct tWAVEFORMATEX
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{
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WORD wFormatTag; // Integer identifier of the format
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WORD nChannels; // Number of audio channels
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DWORD nSamplesPerSec; // Audio sample rate
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DWORD nAvgBytesPerSec; // Bytes per second (possibly approximate)
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WORD nBlockAlign; // Size in bytes of a sample block (all channels)
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WORD wBitsPerSample; // Size in bits of a single per-channel sample
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WORD cbSize; // Bytes of extra data appended to this struct
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} WAVEFORMATEX;
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#endif
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// Defining pointer types outside of the #if block to make sure they are
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// defined even if mmreg.h or mmsystem.h is #included before this file
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typedef WAVEFORMATEX *PWAVEFORMATEX, *NPWAVEFORMATEX, *LPWAVEFORMATEX;
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typedef const WAVEFORMATEX *PCWAVEFORMATEX, *LPCWAVEFORMATEX;
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/**************************************************************************
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*
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* WAVEFORMATEXTENSIBLE: Extended version of WAVEFORMATEX that should be
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* used as a basis for all new audio formats. The format tag is replaced
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* with a GUID, allowing new formats to be defined without registering a
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* format tag with Microsoft. There are also new fields that can be used
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* to specify the spatial positions for each channel and the bit packing
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* used for wide samples (e.g. 24-bit PCM samples in 32-bit containers).
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*
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***************************************************************************/
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#ifndef _WAVEFORMATEXTENSIBLE_
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#define _WAVEFORMATEXTENSIBLE_
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typedef struct
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{
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WAVEFORMATEX Format; // Base WAVEFORMATEX data
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union
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{
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WORD wValidBitsPerSample; // Valid bits in each sample container
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WORD wSamplesPerBlock; // Samples per block of audio data; valid
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// if wBitsPerSample=0 (but rarely used).
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WORD wReserved; // Zero if neither case above applies.
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} Samples;
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DWORD dwChannelMask; // Positions of the audio channels
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GUID SubFormat; // Format identifier GUID
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} WAVEFORMATEXTENSIBLE;
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#endif
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typedef WAVEFORMATEXTENSIBLE *PWAVEFORMATEXTENSIBLE, *LPWAVEFORMATEXTENSIBLE;
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typedef const WAVEFORMATEXTENSIBLE *PCWAVEFORMATEXTENSIBLE, *LPCWAVEFORMATEXTENSIBLE;
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/**************************************************************************
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*
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* Define the most common wave format tags used in WAVEFORMATEX formats.
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*
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***************************************************************************/
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#ifndef WAVE_FORMAT_PCM // Pulse Code Modulation
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// If WAVE_FORMAT_PCM is not defined, we need to define some legacy types
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// for compatibility with the Windows mmreg.h / mmsystem.h header files.
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// Old general format structure (information common to all formats)
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typedef struct waveformat_tag
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{
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WORD wFormatTag;
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WORD nChannels;
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DWORD nSamplesPerSec;
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DWORD nAvgBytesPerSec;
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WORD nBlockAlign;
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} WAVEFORMAT, *PWAVEFORMAT, NEAR *NPWAVEFORMAT, FAR *LPWAVEFORMAT;
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// Specific format structure for PCM data
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typedef struct pcmwaveformat_tag
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{
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WAVEFORMAT wf;
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WORD wBitsPerSample;
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} PCMWAVEFORMAT, *PPCMWAVEFORMAT, NEAR *NPPCMWAVEFORMAT, FAR *LPPCMWAVEFORMAT;
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#define WAVE_FORMAT_PCM 0x0001
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#endif
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#ifndef WAVE_FORMAT_ADPCM // Microsoft Adaptive Differental PCM
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// Replicate the Microsoft ADPCM type definitions from mmreg.h.
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typedef struct adpcmcoef_tag
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{
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short iCoef1;
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short iCoef2;
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} ADPCMCOEFSET;
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#pragma warning(push)
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#pragma warning(disable:4200) // Disable zero-sized array warnings
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typedef struct adpcmwaveformat_tag {
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WAVEFORMATEX wfx;
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WORD wSamplesPerBlock;
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WORD wNumCoef;
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ADPCMCOEFSET aCoef[]; // Always 7 coefficient pairs for MS ADPCM
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} ADPCMWAVEFORMAT;
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#pragma warning(pop)
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#define WAVE_FORMAT_ADPCM 0x0002
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#endif
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// Other frequently used format tags
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#ifndef WAVE_FORMAT_UNKNOWN
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#define WAVE_FORMAT_UNKNOWN 0x0000 // Unknown or invalid format tag
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#endif
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#ifndef WAVE_FORMAT_IEEE_FLOAT
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#define WAVE_FORMAT_IEEE_FLOAT 0x0003 // 32-bit floating-point
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#endif
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#ifndef WAVE_FORMAT_MPEGLAYER3
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#define WAVE_FORMAT_MPEGLAYER3 0x0055 // ISO/MPEG Layer3
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#endif
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#ifndef WAVE_FORMAT_DOLBY_AC3_SPDIF
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#define WAVE_FORMAT_DOLBY_AC3_SPDIF 0x0092 // Dolby Audio Codec 3 over S/PDIF
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#endif
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#ifndef WAVE_FORMAT_WMAUDIO2
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#define WAVE_FORMAT_WMAUDIO2 0x0161 // Windows Media Audio
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#endif
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#ifndef WAVE_FORMAT_WMAUDIO3
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#define WAVE_FORMAT_WMAUDIO3 0x0162 // Windows Media Audio Pro
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#endif
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#ifndef WAVE_FORMAT_WMASPDIF
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#define WAVE_FORMAT_WMASPDIF 0x0164 // Windows Media Audio over S/PDIF
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#endif
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#ifndef WAVE_FORMAT_EXTENSIBLE
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#define WAVE_FORMAT_EXTENSIBLE 0xFFFE // All WAVEFORMATEXTENSIBLE formats
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#endif
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/**************************************************************************
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*
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* Define the most common wave format GUIDs used in WAVEFORMATEXTENSIBLE
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* formats. Note that including the Windows ksmedia.h header after this
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* one will cause build problems; this cannot be avoided, since ksmedia.h
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* defines these macros without preprocessor guards.
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*
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***************************************************************************/
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#ifdef __cplusplus // uuid() and __uuidof() are only available in C++
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#ifndef KSDATAFORMAT_SUBTYPE_PCM
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struct __declspec(uuid("00000001-0000-0010-8000-00aa00389b71")) KSDATAFORMAT_SUBTYPE_PCM_STRUCT;
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#define KSDATAFORMAT_SUBTYPE_PCM __uuidof(KSDATAFORMAT_SUBTYPE_PCM_STRUCT)
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#endif
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#ifndef KSDATAFORMAT_SUBTYPE_ADPCM
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struct __declspec(uuid("00000002-0000-0010-8000-00aa00389b71")) KSDATAFORMAT_SUBTYPE_ADPCM_STRUCT;
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#define KSDATAFORMAT_SUBTYPE_ADPCM __uuidof(KSDATAFORMAT_SUBTYPE_ADPCM_STRUCT)
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#endif
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#ifndef KSDATAFORMAT_SUBTYPE_IEEE_FLOAT
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struct __declspec(uuid("00000003-0000-0010-8000-00aa00389b71")) KSDATAFORMAT_SUBTYPE_IEEE_FLOAT_STRUCT;
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#define KSDATAFORMAT_SUBTYPE_IEEE_FLOAT __uuidof(KSDATAFORMAT_SUBTYPE_IEEE_FLOAT_STRUCT)
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#endif
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#endif
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/**************************************************************************
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*
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* Speaker positions used in the WAVEFORMATEXTENSIBLE dwChannelMask field.
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*
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***************************************************************************/
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#ifndef SPEAKER_FRONT_LEFT
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#define SPEAKER_FRONT_LEFT 0x00000001
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#define SPEAKER_FRONT_RIGHT 0x00000002
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#define SPEAKER_FRONT_CENTER 0x00000004
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#define SPEAKER_LOW_FREQUENCY 0x00000008
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#define SPEAKER_BACK_LEFT 0x00000010
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#define SPEAKER_BACK_RIGHT 0x00000020
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#define SPEAKER_FRONT_LEFT_OF_CENTER 0x00000040
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#define SPEAKER_FRONT_RIGHT_OF_CENTER 0x00000080
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#define SPEAKER_BACK_CENTER 0x00000100
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#define SPEAKER_SIDE_LEFT 0x00000200
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#define SPEAKER_SIDE_RIGHT 0x00000400
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#define SPEAKER_TOP_CENTER 0x00000800
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#define SPEAKER_TOP_FRONT_LEFT 0x00001000
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#define SPEAKER_TOP_FRONT_CENTER 0x00002000
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#define SPEAKER_TOP_FRONT_RIGHT 0x00004000
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#define SPEAKER_TOP_BACK_LEFT 0x00008000
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#define SPEAKER_TOP_BACK_CENTER 0x00010000
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#define SPEAKER_TOP_BACK_RIGHT 0x00020000
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#define SPEAKER_RESERVED 0x7FFC0000
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#define SPEAKER_ALL 0x80000000
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#define _SPEAKER_POSITIONS_
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#endif
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#ifndef SPEAKER_STEREO
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#define SPEAKER_MONO (SPEAKER_FRONT_CENTER)
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#define SPEAKER_STEREO (SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT)
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#define SPEAKER_2POINT1 (SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_LOW_FREQUENCY)
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#define SPEAKER_SURROUND (SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_FRONT_CENTER | SPEAKER_BACK_CENTER)
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#define SPEAKER_QUAD (SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_BACK_LEFT | SPEAKER_BACK_RIGHT)
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#define SPEAKER_4POINT1 (SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_LOW_FREQUENCY | SPEAKER_BACK_LEFT | SPEAKER_BACK_RIGHT)
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#define SPEAKER_5POINT1 (SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_FRONT_CENTER | SPEAKER_LOW_FREQUENCY | SPEAKER_BACK_LEFT | SPEAKER_BACK_RIGHT)
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#define SPEAKER_7POINT1 (SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_FRONT_CENTER | SPEAKER_LOW_FREQUENCY | SPEAKER_BACK_LEFT | SPEAKER_BACK_RIGHT | SPEAKER_FRONT_LEFT_OF_CENTER | SPEAKER_FRONT_RIGHT_OF_CENTER)
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#define SPEAKER_5POINT1_SURROUND (SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_FRONT_CENTER | SPEAKER_LOW_FREQUENCY | SPEAKER_SIDE_LEFT | SPEAKER_SIDE_RIGHT)
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#define SPEAKER_7POINT1_SURROUND (SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_FRONT_CENTER | SPEAKER_LOW_FREQUENCY | SPEAKER_BACK_LEFT | SPEAKER_BACK_RIGHT | SPEAKER_SIDE_LEFT | SPEAKER_SIDE_RIGHT)
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#endif
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#pragma pack(pop)
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#endif // #ifndef __AUDIODEFS_INCLUDED__
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