#define DSBUSID_IS_SPKR_LOC(id) ( ((id) >= DSBUSID_FIRST_SPKR_LOC) && ((id) <= DSBUSID_LAST_SPKR_LOC) )

/* These bus identifiers are for the standard DLS effect sends 
 */
#define DSBUSID_REVERB_SEND                64
#define DSBUSID_CHORUS_SEND                65

/* Dynamic bus identifiers start here. See the documentation for how
 * synthesizers map the output of voices to static and dynamic
 * bus identifiers.
 */ 
#define DSBUSID_DYNAMIC_0                 512 

/* Null bus, used to identify busses that have no function mapping. 
*/
#define DSBUSID_NULL			   0xFFFFFFFF

interface IDirectMusic;
interface IDirectMusic8;
interface IDirectMusicBuffer;
interface IDirectMusicPort;
interface IDirectMusicThru;
interface IReferenceClock;

#ifndef __cplusplus 

typedef interface IDirectMusic IDirectMusic;
typedef interface IDirectMusic8 IDirectMusic8;
typedef interface IDirectMusicPort IDirectMusicPort;
typedef interface IDirectMusicBuffer IDirectMusicBuffer;
typedef interface IDirectMusicThru IDirectMusicThru;
typedef interface IReferenceClock IReferenceClock;

#endif  /* C++ */

typedef IDirectMusic *LPDIRECTMUSIC;
typedef IDirectMusic8 *LPDIRECTMUSIC8;
typedef IDirectMusicPort *LPDIRECTMUSICPORT;
typedef IDirectMusicBuffer *LPDIRECTMUSICBUFFER;

#undef  INTERFACE
#define INTERFACE  IDirectMusic
DECLARE_INTERFACE_(IDirectMusic, IUnknown)
{
    /*  IUnknown */
    STDMETHOD(QueryInterface)       (THIS_ REFIID, LPVOID FAR *) PURE;
    STDMETHOD_(ULONG,AddRef)        (THIS) PURE;
    STDMETHOD_(ULONG,Release)       (THIS) PURE;

    /*  IDirectMusic */
    STDMETHOD(EnumPort)             (THIS_ DWORD dwIndex, 
                                           LPDMUS_PORTCAPS pPortCaps) PURE;
    STDMETHOD(CreateMusicBuffer)    (THIS_ LPDMUS_BUFFERDESC pBufferDesc, 
                                           LPDIRECTMUSICBUFFER *ppBuffer, 
                                           LPUNKNOWN pUnkOuter) PURE;
    STDMETHOD(CreatePort)           (THIS_ REFCLSID rclsidPort, 
                                           LPDMUS_PORTPARAMS pPortParams, 
                                           LPDIRECTMUSICPORT *ppPort, 
                                           LPUNKNOWN pUnkOuter) PURE;
    STDMETHOD(EnumMasterClock)      (THIS_ DWORD dwIndex, 
                                           LPDMUS_CLOCKINFO lpClockInfo) PURE;
    STDMETHOD(GetMasterClock)       (THIS_ LPGUID pguidClock, 
                                           IReferenceClock **ppReferenceClock) PURE;
    STDMETHOD(SetMasterClock)       (THIS_ REFGUID rguidClock) PURE;
    STDMETHOD(Activate)             (THIS_ BOOL fEnable) PURE;
    STDMETHOD(GetDefaultPort)       (THIS_ LPGUID pguidPort) PURE;
    STDMETHOD(SetDirectSound)       (THIS_ LPDIRECTSOUND pDirectSound,
                                           HWND hWnd) PURE;
};

#undef  INTERFACE
#define INTERFACE  IDirectMusic8
DECLARE_INTERFACE_(IDirectMusic8, IDirectMusic)
{
    /*  IUnknown */
    STDMETHOD(QueryInterface)       (THIS_ REFIID, LPVOID FAR *) PURE;
    STDMETHOD_(ULONG,AddRef)        (THIS) PURE;
    STDMETHOD_(ULONG,Release)       (THIS) PURE;

    /*  IDirectMusic */
    STDMETHOD(EnumPort)             (THIS_ DWORD dwIndex, 
                                           LPDMUS_PORTCAPS pPortCaps) PURE;
    STDMETHOD(CreateMusicBuffer)    (THIS_ LPDMUS_BUFFERDESC pBufferDesc, 
                                           LPDIRECTMUSICBUFFER *ppBuffer, 
                                           LPUNKNOWN pUnkOuter) PURE;
    STDMETHOD(CreatePort)           (THIS_ REFCLSID rclsidPort, 
                                           LPDMUS_PORTPARAMS pPortParams, 
                                           LPDIRECTMUSICPORT *ppPort, 
                                           LPUNKNOWN pUnkOuter) PURE;
    STDMETHOD(EnumMasterClock)      (THIS_ DWORD dwIndex, 
                                           LPDMUS_CLOCKINFO lpClockInfo) PURE;
    STDMETHOD(GetMasterClock)       (THIS_ LPGUID pguidClock, 
                                           IReferenceClock **ppReferenceClock) PURE;
    STDMETHOD(SetMasterClock)       (THIS_ REFGUID rguidClock) PURE;
    STDMETHOD(Activate)             (THIS_ BOOL fEnable) PURE;
    STDMETHOD(GetDefaultPort)       (THIS_ LPGUID pguidPort) PURE;
    STDMETHOD(SetDirectSound)       (THIS_ LPDIRECTSOUND pDirectSound,
                                           HWND hWnd) PURE;
    /*  IDirectMusic8 */
    STDMETHOD(SetExternalMasterClock)
                                    (THIS_ IReferenceClock *pClock) PURE;                                          
};

#undef  INTERFACE
#define INTERFACE  IDirectMusicBuffer
DECLARE_INTERFACE_(IDirectMusicBuffer, IUnknown)
{
    /*  IUnknown */
    STDMETHOD(QueryInterface)       (THIS_ REFIID, LPVOID FAR *) PURE;
    STDMETHOD_(ULONG,AddRef)        (THIS) PURE;
    STDMETHOD_(ULONG,Release)       (THIS) PURE;

    /*  IDirectMusicBuffer */
    STDMETHOD(Flush)                (THIS) PURE;
    STDMETHOD(TotalTime)            (THIS_ LPREFERENCE_TIME prtTime) PURE;
    
    STDMETHOD(PackStructured)       (THIS_ REFERENCE_TIME rt,
                                           DWORD dwChannelGroup,
                                           DWORD dwChannelMessage) PURE;
    
    STDMETHOD(PackUnstructured)     (THIS_ REFERENCE_TIME rt,
                                           DWORD dwChannelGroup,
                                           DWORD cb,
                                           LPBYTE lpb) PURE;
    
    STDMETHOD(ResetReadPtr)         (THIS) PURE;
    STDMETHOD(GetNextEvent)         (THIS_ LPREFERENCE_TIME prt,
                                           LPDWORD pdwChannelGroup,
                                           LPDWORD pdwLength,
                                           LPBYTE *ppData) PURE;

    STDMETHOD(GetRawBufferPtr)      (THIS_ LPBYTE *ppData) PURE;
    STDMETHOD(GetStartTime)         (THIS_ LPREFERENCE_TIME prt) PURE;
    STDMETHOD(GetUsedBytes)         (THIS_ LPDWORD pcb) PURE;
    STDMETHOD(GetMaxBytes)          (THIS_ LPDWORD pcb) PURE;
    STDMETHOD(GetBufferFormat)      (THIS_ LPGUID pGuidFormat) PURE;

    STDMETHOD(SetStartTime)         (THIS_ REFERENCE_TIME rt) PURE;
    STDMETHOD(SetUsedBytes)         (THIS_ DWORD cb) PURE;
};

typedef IDirectMusicBuffer IDirectMusicBuffer8;
typedef IDirectMusicBuffer8 *LPDIRECTMUSICBUFFER8;

#undef  INTERFACE
#define INTERFACE  IDirectMusicInstrument
DECLARE_INTERFACE_(IDirectMusicInstrument, IUnknown)
{
    /* IUnknown */
    STDMETHOD(QueryInterface)           (THIS_ REFIID, LPVOID FAR *) PURE;
    STDMETHOD_(ULONG,AddRef)            (THIS) PURE;
    STDMETHOD_(ULONG,Release)           (THIS) PURE;

    /* IDirectMusicInstrument */
    STDMETHOD(GetPatch)                 (THIS_ DWORD* pdwPatch) PURE;
    STDMETHOD(SetPatch)                 (THIS_ DWORD dwPatch) PURE;
};

typedef IDirectMusicInstrument IDirectMusicInstrument8;
typedef IDirectMusicInstrument8 *LPDIRECTMUSICINSTRUMENT8;

#undef  INTERFACE
#define INTERFACE  IDirectMusicDownloadedInstrument
DECLARE_INTERFACE_(IDirectMusicDownloadedInstrument, IUnknown)
{
    /* IUnknown */
    STDMETHOD(QueryInterface)           (THIS_ REFIID, LPVOID FAR *) PURE;
    STDMETHOD_(ULONG,AddRef)            (THIS) PURE;
    STDMETHOD_(ULONG,Release)           (THIS) PURE;

    /* IDirectMusicDownloadedInstrument */
    /* None at this time */
};

typedef IDirectMusicDownloadedInstrument IDirectMusicDownloadedInstrument8;
typedef IDirectMusicDownloadedInstrument8 *LPDIRECTMUSICDOWNLOADEDINSTRUMENT8;

#undef  INTERFACE
#define INTERFACE  IDirectMusicCollection
DECLARE_INTERFACE_(IDirectMusicCollection, IUnknown)
{
    /* IUnknown */
    STDMETHOD(QueryInterface)           (THIS_ REFIID, LPVOID FAR *) PURE;
    STDMETHOD_(ULONG,AddRef)            (THIS) PURE;
    STDMETHOD_(ULONG,Release)           (THIS) PURE;

    /* IDirectMusicCollection */
    STDMETHOD(GetInstrument)            (THIS_ DWORD dwPatch, 
                                               IDirectMusicInstrument** ppInstrument) PURE;
    STDMETHOD(EnumInstrument)           (THIS_ DWORD dwIndex, 
                                               DWORD* pdwPatch, 
                                               LPWSTR pwszName, 
                                               DWORD dwNameLen) PURE;
};

typedef IDirectMusicCollection IDirectMusicCollection8;
typedef IDirectMusicCollection8 *LPDIRECTMUSICCOLLECTION8;

#undef  INTERFACE
#define INTERFACE  IDirectMusicDownload 
DECLARE_INTERFACE_(IDirectMusicDownload , IUnknown)
{
    /* IUnknown */
    STDMETHOD(QueryInterface)       (THIS_ REFIID, LPVOID FAR *) PURE;
    STDMETHOD_(ULONG,AddRef)        (THIS) PURE;
    STDMETHOD_(ULONG,Release)       (THIS) PURE;

    /* IDirectMusicDownload */
    STDMETHOD(GetBuffer)            (THIS_ void** ppvBuffer, 
                                           DWORD* pdwSize) PURE;
};

typedef IDirectMusicDownload IDirectMusicDownload8;
typedef IDirectMusicDownload8 *LPDIRECTMUSICDOWNLOAD8;

#undef  INTERFACE
#define INTERFACE  IDirectMusicPortDownload
DECLARE_INTERFACE_(IDirectMusicPortDownload, IUnknown)
{
    /* IUnknown */
    STDMETHOD(QueryInterface)       (THIS_ REFIID, LPVOID FAR *) PURE;
    STDMETHOD_(ULONG,AddRef)        (THIS) PURE;
    STDMETHOD_(ULONG,Release)       (THIS) PURE;

    /* IDirectMusicPortDownload */
    STDMETHOD(GetBuffer)            (THIS_ DWORD dwDLId, 
                                           IDirectMusicDownload** ppIDMDownload) PURE;
    STDMETHOD(AllocateBuffer)       (THIS_ DWORD dwSize, 
                                           IDirectMusicDownload** ppIDMDownload) PURE;
    STDMETHOD(GetDLId)              (THIS_ DWORD* pdwStartDLId, 
                                           DWORD dwCount) PURE;
    STDMETHOD(GetAppend)            (THIS_ DWORD* pdwAppend) PURE;
    STDMETHOD(Download)             (THIS_ IDirectMusicDownload* pIDMDownload) PURE;
    STDMETHOD(Unload)               (THIS_ IDirectMusicDownload* pIDMDownload) PURE;
};

typedef IDirectMusicPortDownload IDirectMusicPortDownload8;
typedef IDirectMusicPortDownload8 *LPDIRECTMUSICPORTDOWNLOAD8;

/* Standard values for voice priorities. Numerically higher priorities are higher in priority.
 * These priorities are used to set the voice priority for all voices on a channel. They are
 * used in the dwPriority parameter of IDirectMusicPort::GetPriority and returned in the
 * lpwPriority parameter of pdwPriority.
 *
 * These priorities are shared with DirectSound.
 */

#ifndef _DIRECTAUDIO_PRIORITIES_DEFINED_
#define _DIRECTAUDIO_PRIORITIES_DEFINED_

#define DAUD_CRITICAL_VOICE_PRIORITY    (0xF0000000)
#define DAUD_HIGH_VOICE_PRIORITY        (0xC0000000)
#define DAUD_STANDARD_VOICE_PRIORITY    (0x80000000)
#define DAUD_LOW_VOICE_PRIORITY         (0x40000000)
#define DAUD_PERSIST_VOICE_PRIORITY     (0x10000000) 

/* These are the default priorities assigned if not overridden. By default priorities are
 * equal across channel groups (e.g. channel 5 on channel group 1 has the same priority as
 * channel 5 on channel group 2).
 *
 * In accordance with DLS level 1, channel 10 has the highest priority, followed by 1 through 16
 * except for 10.