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/***************************************************************************

 *

 *  Copyright (c) Microsoft Corporation.  All rights reserved.

 *

 *  File:     audiodefs.h

 *  Content:  Basic constants and data types for audio work.

 *

 *  Remarks:  This header file defines all of the audio format constants and

 *            structures required for XAudio2 and XACT work.  Providing these

 *            in a single location avoids certain dependency problems in the

 *            legacy audio headers (mmreg.h, mmsystem.h, ksmedia.h).

 *

 *            NOTE: Including the legacy headers after this one may cause a

 *            compilation error, because they define some of the same types

 *            defined here without preprocessor guards to avoid multiple

 *            definitions.  If a source file needs one of the old headers,

 *            it must include it before including audiodefs.h.

 *

 ***************************************************************************/

#ifndef __AUDIODEFS_INCLUDED__

#define __AUDIODEFS_INCLUDED__

#include <windef.h>  // For WORD, DWORD, etc.

#pragma pack(push, 1)  // Pack structures to 1-byte boundaries

/**************************************************************************

 *

 *  WAVEFORMATEX: Base structure for many audio formats.  Format-specific

 *  extensions can be defined for particular formats by using a non-zero

 *  cbSize value and adding extra fields to the end of this structure.

 *

 ***************************************************************************/

#ifndef _WAVEFORMATEX_

    #define _WAVEFORMATEX_

    typedef struct tWAVEFORMATEX

    {

        WORD wFormatTag;        // Integer identifier of the format

        WORD nChannels;         // Number of audio channels

        DWORD nSamplesPerSec;   // Audio sample rate

        DWORD nAvgBytesPerSec;  // Bytes per second (possibly approximate)

        WORD nBlockAlign;       // Size in bytes of a sample block (all channels)

        WORD wBitsPerSample;    // Size in bits of a single per-channel sample

        WORD cbSize;            // Bytes of extra data appended to this struct

    } WAVEFORMATEX;

#endif

// Defining pointer types outside of the #if block to make sure they are

// defined even if mmreg.h or mmsystem.h is #included before this file

typedef WAVEFORMATEX *PWAVEFORMATEX, *NPWAVEFORMATEX, *LPWAVEFORMATEX;

typedef const WAVEFORMATEX *PCWAVEFORMATEX, *LPCWAVEFORMATEX;

/**************************************************************************

 *

 *  WAVEFORMATEXTENSIBLE: Extended version of WAVEFORMATEX that should be

 *  used as a basis for all new audio formats.  The format tag is replaced

 *  with a GUID, allowing new formats to be defined without registering a

 *  format tag with Microsoft.  There are also new fields that can be used

 *  to specify the spatial positions for each channel and the bit packing

 *  used for wide samples (e.g. 24-bit PCM samples in 32-bit containers).

 *

 ***************************************************************************/

#ifndef _WAVEFORMATEXTENSIBLE_

    #define _WAVEFORMATEXTENSIBLE_

    typedef struct

    {

        WAVEFORMATEX Format;          // Base WAVEFORMATEX data

        union

        {

            WORD wValidBitsPerSample; // Valid bits in each sample container

            WORD wSamplesPerBlock;    // Samples per block of audio data; valid

                                      // if wBitsPerSample=0 (but rarely used).

            WORD wReserved;           // Zero if neither case above applies.

        } Samples;

        DWORD dwChannelMask;          // Positions of the audio channels

        GUID SubFormat;               // Format identifier GUID

    } WAVEFORMATEXTENSIBLE;

#endif

typedef WAVEFORMATEXTENSIBLE *PWAVEFORMATEXTENSIBLE, *LPWAVEFORMATEXTENSIBLE;

typedef const WAVEFORMATEXTENSIBLE *PCWAVEFORMATEXTENSIBLE, *LPCWAVEFORMATEXTENSIBLE;

/**************************************************************************

 *

 *  Define the most common wave format tags used in WAVEFORMATEX formats.

 *

 ***************************************************************************/

#ifndef WAVE_FORMAT_PCM  // Pulse Code Modulation

    // If WAVE_FORMAT_PCM is not defined, we need to define some legacy types

    // for compatibility with the Windows mmreg.h / mmsystem.h header files.

    // Old general format structure (information common to all formats)

    typedef struct waveformat_tag

    {

        WORD wFormatTag;

        WORD nChannels;

        DWORD nSamplesPerSec;

        DWORD nAvgBytesPerSec;

        WORD nBlockAlign;

    } WAVEFORMAT, *PWAVEFORMAT, NEAR *NPWAVEFORMAT, FAR *LPWAVEFORMAT;

    // Specific format structure for PCM data

    typedef struct pcmwaveformat_tag

    {

        WAVEFORMAT wf;

        WORD wBitsPerSample;

    } PCMWAVEFORMAT, *PPCMWAVEFORMAT, NEAR *NPPCMWAVEFORMAT, FAR *LPPCMWAVEFORMAT;

    #define WAVE_FORMAT_PCM 0x0001

#endif

#ifndef WAVE_FORMAT_ADPCM  // Microsoft Adaptive Differental PCM

    // Replicate the Microsoft ADPCM type definitions from mmreg.h.

    typedef struct adpcmcoef_tag

    {

        short iCoef1;

        short iCoef2;

    } ADPCMCOEFSET;

    #pragma warning(push)

    #pragma warning(disable:4200)  // Disable zero-sized array warnings

    typedef struct adpcmwaveformat_tag {

        WAVEFORMATEX wfx;

        WORD wSamplesPerBlock;

        WORD wNumCoef;

        ADPCMCOEFSET aCoef[];  // Always 7 coefficient pairs for MS ADPCM

    } ADPCMWAVEFORMAT;

    #pragma warning(pop)

    #define WAVE_FORMAT_ADPCM 0x0002

#endif

// Other frequently used format tags

#ifndef WAVE_FORMAT_UNKNOWN

    #define WAVE_FORMAT_UNKNOWN         0x0000 // Unknown or invalid format tag

#endif

#ifndef WAVE_FORMAT_IEEE_FLOAT

    #define WAVE_FORMAT_IEEE_FLOAT      0x0003 // 32-bit floating-point

#endif

#ifndef WAVE_FORMAT_MPEGLAYER3

    #define WAVE_FORMAT_MPEGLAYER3      0x0055 // ISO/MPEG Layer3

#endif

#ifndef WAVE_FORMAT_DOLBY_AC3_SPDIF

    #define WAVE_FORMAT_DOLBY_AC3_SPDIF 0x0092 // Dolby Audio Codec 3 over S/PDIF

#endif

#ifndef WAVE_FORMAT_WMAUDIO2

    #define WAVE_FORMAT_WMAUDIO2        0x0161 // Windows Media Audio

#endif

#ifndef WAVE_FORMAT_WMAUDIO3

    #define WAVE_FORMAT_WMAUDIO3        0x0162 // Windows Media Audio Pro

#endif

#ifndef WAVE_FORMAT_WMASPDIF

    #define WAVE_FORMAT_WMASPDIF        0x0164 // Windows Media Audio over S/PDIF

#endif

#ifndef WAVE_FORMAT_EXTENSIBLE

    #define WAVE_FORMAT_EXTENSIBLE      0xFFFE // All WAVEFORMATEXTENSIBLE formats

#endif

/**************************************************************************

 *

 *  Define the most common wave format GUIDs used in WAVEFORMATEXTENSIBLE

 *  formats.  Note that including the Windows ksmedia.h header after this

 *  one will cause build problems; this cannot be avoided, since ksmedia.h

 *  defines these macros without preprocessor guards.

 *

 ***************************************************************************/

#ifdef __cplusplus // uuid() and __uuidof() are only available in C++

    #ifndef KSDATAFORMAT_SUBTYPE_PCM

        struct __declspec(uuid("00000001-0000-0010-8000-00aa00389b71")) KSDATAFORMAT_SUBTYPE_PCM_STRUCT;

        #define KSDATAFORMAT_SUBTYPE_PCM __uuidof(KSDATAFORMAT_SUBTYPE_PCM_STRUCT)

    #endif

    #ifndef KSDATAFORMAT_SUBTYPE_ADPCM

        struct __declspec(uuid("00000002-0000-0010-8000-00aa00389b71")) KSDATAFORMAT_SUBTYPE_ADPCM_STRUCT;

        #define KSDATAFORMAT_SUBTYPE_ADPCM __uuidof(KSDATAFORMAT_SUBTYPE_ADPCM_STRUCT)

    #endif

    #ifndef KSDATAFORMAT_SUBTYPE_IEEE_FLOAT

        struct __declspec(uuid("00000003-0000-0010-8000-00aa00389b71")) KSDATAFORMAT_SUBTYPE_IEEE_FLOAT_STRUCT;

        #define KSDATAFORMAT_SUBTYPE_IEEE_FLOAT __uuidof(KSDATAFORMAT_SUBTYPE_IEEE_FLOAT_STRUCT)

    #endif

#endif

/**************************************************************************

 *

 *  Speaker positions used in the WAVEFORMATEXTENSIBLE dwChannelMask field.

 *

 ***************************************************************************/

#ifndef SPEAKER_FRONT_LEFT

    #define SPEAKER_FRONT_LEFT            0x00000001

    #define SPEAKER_FRONT_RIGHT           0x00000002

    #define SPEAKER_FRONT_CENTER          0x00000004

    #define SPEAKER_LOW_FREQUENCY         0x00000008

    #define SPEAKER_BACK_LEFT             0x00000010

    #define SPEAKER_BACK_RIGHT            0x00000020

    #define SPEAKER_FRONT_LEFT_OF_CENTER  0x00000040

    #define SPEAKER_FRONT_RIGHT_OF_CENTER 0x00000080

    #define SPEAKER_BACK_CENTER           0x00000100

    #define SPEAKER_SIDE_LEFT             0x00000200

    #define SPEAKER_SIDE_RIGHT            0x00000400

    #define SPEAKER_TOP_CENTER            0x00000800

    #define SPEAKER_TOP_FRONT_LEFT        0x00001000

    #define SPEAKER_TOP_FRONT_CENTER      0x00002000

    #define SPEAKER_TOP_FRONT_RIGHT       0x00004000

    #define SPEAKER_TOP_BACK_LEFT         0x00008000

    #define SPEAKER_TOP_BACK_CENTER       0x00010000

    #define SPEAKER_TOP_BACK_RIGHT        0x00020000

    #define SPEAKER_RESERVED              0x7FFC0000

    #define SPEAKER_ALL                   0x80000000

    #define _SPEAKER_POSITIONS_

#endif

#ifndef SPEAKER_STEREO

    #define SPEAKER_MONO             (SPEAKER_FRONT_CENTER)

    #define SPEAKER_STEREO           (SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT)

    #define SPEAKER_2POINT1          (SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_LOW_FREQUENCY)

    #define SPEAKER_SURROUND         (SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_FRONT_CENTER | SPEAKER_BACK_CENTER)

    #define SPEAKER_QUAD             (SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_BACK_LEFT | SPEAKER_BACK_RIGHT)

    #define SPEAKER_4POINT1          (SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_LOW_FREQUENCY | SPEAKER_BACK_LEFT | SPEAKER_BACK_RIGHT)

    #define SPEAKER_5POINT1          (SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_FRONT_CENTER | SPEAKER_LOW_FREQUENCY | SPEAKER_BACK_LEFT | SPEAKER_BACK_RIGHT)

    #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)

    #define SPEAKER_5POINT1_SURROUND (SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_FRONT_CENTER | SPEAKER_LOW_FREQUENCY | SPEAKER_SIDE_LEFT | SPEAKER_SIDE_RIGHT)

    #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)

#endif

#pragma pack(pop)

#endif // #ifndef __AUDIODEFS_INCLUDED__