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435 lines
17 KiB
435 lines
17 KiB
// Copyright (c) 1998-1999 Microsoft Corporation
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/* @Doc DMusic16
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*
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* @Module DMusic16.h - Internal definitions for DMusic16.DLL |
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*/
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#ifndef __DMUSIC16__
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#define __DMUSIC16__
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#undef WINAPI
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#define WINAPI _loadds FAR PASCAL
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#ifdef WIN32
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#define BCODE
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#define BSTACK
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#else
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#define BCODE __based(__segname("_CODE"))
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#define BSTACK __based(__segname("_STACK"))
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#endif
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/* Make symbols show up in debug builds
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*/
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#ifdef DEBUG
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#define STATIC
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#else
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#define STATIC static
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#endif
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/* MIDI defines
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*/
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#define MIDI_CHANNELS 16
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#define SZCODE const char BCODE
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/* Quadword alignment for event lengths in DMEVENT's
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*/
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#define QWORD_ALIGN(x) (((x) + 7) & ~7) /* Next highest */
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#define QWORD_TRUNC(x) ((x) & ~7) /* Next lowest */
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/* Multiplier to convert between reftime and milliseconds
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*/
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#define REFTIME_TO_MS (10L*1000L)
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/* Number of events we want in the capture pool. Based on about a second's worth of high
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* concentration data
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*/
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#define CAP_HIGHWATERMARK 1024
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/* How often user-mode timer ticks happen (milliseconds)
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*/
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#define MS_USERMODE 1000
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/* Typedefs for everyone. Woohoo!
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*/
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typedef struct QUADWORD QUADWORD;
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typedef struct QUADWORD NEAR *NPQUADWORD;
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typedef struct QUADWORD FAR *LPQUADWORD;
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typedef struct LINKNODE LINKNODE;
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typedef struct LINKNODE NEAR *NPLINKNODE;
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typedef struct LINKNODE FAR *LPLINKNODE;
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typedef struct DMEVENT DMEVENT;
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typedef struct DMEVENT NEAR *NPDMEVENT;
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typedef struct DMEVENT FAR *LPDMEVENT;
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typedef struct EVENT EVENT;
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typedef struct EVENT NEAR *NPEVENT;
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typedef struct EVENT FAR *LPEVENT;
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typedef struct EVENTQUEUE EVENTQUEUE;
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typedef struct EVENTQUEUE NEAR *NPEVENTQUEUE;
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typedef struct EVENTQUEUE FAR *LPEVENTQUEUE;
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typedef struct OPENHANDLEINSTANCE OPENHANDLEINSTANCE;
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typedef struct OPENHANDLEINSTANCE NEAR *NPOPENHANDLEINSTANCE;
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typedef struct OPENHANDLEINSTANCE FAR *LPOPENHANDLEINSTANCE;
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typedef struct OPENHANDLE OPENHANDLE;
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typedef struct OPENHANDLE NEAR *NPOPENHANDLE;
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typedef struct OPENHANDLE FAR *LPOPENHANDLE;
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typedef struct THRUCHANNEL THRUCHANNEL;
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typedef struct THRUCHANNEL NEAR *NPTHRUCHANNEL;
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typedef struct THRUCHANNEL FAR *LPTHRUCHANNEL;
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/* 64-bit integer used w/ assembly helpers
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*/
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struct QUADWORD
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{
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DWORD dwLow;
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DWORD dwHigh;
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};
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/* @struct Holds things in doubly linked lists
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*/
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struct LINKNODE {
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NPLINKNODE pPrev; /* @field NPLINKNODE | pPrev |
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Pointer to the previous node in the list */
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NPLINKNODE pNext; /* @field NPLINKNODE | pNext |
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Pointer to the next node in the list */
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};
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/* @struct DirectMusic event as packed by IDirectMusic
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*/
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struct DMEVENT {
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DWORD cbEvent; /* @field DWORD | cbEvent |
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Unrounded number of event bytes */
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DWORD dwChannelGroup; /* @field DWORD | dwChannelGroup |
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This field determines which channel group (set of 16 MIDI channels) receives the event. */
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QUADWORD rtDelta; /* @field QUADWORD | rtDelta | Offset from buffer header in 100 ns units */
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DWORD dwFlags; /* @field DWORD | dwFlags | DMEVENT_xxx */
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BYTE abEvent[0]; /* @field BYTE | abEvent[] |
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Actual event data, rounded up to be an even number
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of QWORD's (8 bytes) */
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};
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/* Total size of an event needed to hold cb bytes of data */
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#define DMEVENT_SIZE(cb) QWORD_ALIGN(sizeof(DMEVENT) + (cb))
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/* If we have cb for event + data, how much data can we fit? */
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#define DMEVENT_DATASIZE(cb) (QWORD_TRUNC(cb) - sizeof(DMEVENT))
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#define DMEVENT_STRUCTURED 0x00000001
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#define EVENT_F_MIDIHDR 0x0001
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/* @struct Event as stored in an <c EVENTQUEUE>.
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*/
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struct EVENT {
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LPEVENT lpNext; /* @field LPEVENT | lpNext |
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Next event in queue */
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DWORD msTime; /* @field DWORD | msTime |
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Absolute ms time in stream time (i.e. timeSetEvent) */
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QUADWORD rtTime; /* @field QUADWORD | rtTime |
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Absolute time in 100ns units relative to reference clock. Use for sorting event queue. */
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WORD wFlags; /* @field WORD | wFlags |
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A bitwise combination of the following flags:
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@flag EVENT_F_MIDIHDR | The event data starts with a MIDIHDR */
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WORD cbEvent; /* @field WORD | cbEvent |
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The unrounded number of bytes in the event data */
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BYTE abEvent[0]; /* @field BYTE | abEvent[] |
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The actual event data, rounded up to be an even number of DWORD's */
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};
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/* @struct A queue of <c EVENT> structs.
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*
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* @comm
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* This is not the same as the generic list in list.c because we don't need
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* the overhead of a prev pointer here and we don't need the overhead of a far
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* pointer there.
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*/
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struct EVENTQUEUE {
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LPEVENT pHead; /* @field LPEVENT | pHead | Pointer to the first event */
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LPEVENT pTail; /* @field LPEVENT | pTail | Pointer to the last event */
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UINT cEle; /* @field UINT | cEle | The number of events currently in queue */
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};
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/* @struct An instance of an open device
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*
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* @comm
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*
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* Since multiple Win32 processes can hold a single MMSYSTEM handle open,
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* we need to track them. There is one of these structs per Win32 client
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* per open handle. It simply refers to the OPENHANDLE which contains
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* all the actual handle data.
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*
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*/
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struct OPENHANDLEINSTANCE {
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LINKNODE link; /* @field LINKNODE | link | Holds this handle in gOpenHandleInstanceList */
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LINKNODE linkHandleList; /* @field LINKNODE | linkHandleList |
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Holds this handle in the list maintained in the <c OPENHANDLE> struct for this device. */
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NPOPENHANDLE pHandle; /* @field NPOPENHANDLE | pHandle |
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Pointer to the <c OPENHANDLE> struct for this device. */
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DWORD dwVxDEventHandle; /* @field DWORD | dwVxDEventHandle |
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VxD Event handle for signalling input on this device for this client. */
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BOOL fActive; /* @field BOOL | fActive | Indicates if the port is active or not. This is used for per-instance
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focus management. If the port is flagged as inactive, then the underlying device is not opened. */
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WORD wTask; /* @field WORD | wTask | Task which opened the handle. This is used to clean up if the task
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terminates abnormally. */
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NPTHRUCHANNEL pThru; /* @field NPTHRUCHANNEL | pThru If an input device, an array of 16 thru
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entries, one per input channel. */
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};
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/* OPENHANDLE.wFlags
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*/
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#define OH_F_MIDIIN 0x0001 /* This is a MIDI input device */
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#define OH_F_CLOSING 0x0002 /* This device is being closed */
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#define OH_F_SHARED 0x0004 /* This device is shareable */
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/* @struct An open device
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*
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* @comm
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*
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* There is a one-to-one relationship between open handles and <c OPENHANDLE> structs.
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*
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* All of the following event queues are either
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* Protected - means it is accessible at callback time and user time, and is
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* protected by wCritSect
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* Callback - Means it is unprotected by a critical section and is only accessible
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* at callback time. Callbacks, per handle, are not reentered.
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*
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* In the MIDI in callback, we *cannot* just go away if we don't get wCritSect,
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* as we can on output. Hence the multiple input queues below.
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*
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* When the user mode refill algorithm runs, it puts events in qFree, protected
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* by the critical section. (The one exception to this is preloading qFreeCB before
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* midiInStart is called on the handle). When the callback runs, it tried to get the
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* critical section. If it can, it moves the free events from qFree to qFreeCB.
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*
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* In any case, the callback can now use qFreeCB even if it didn't get the critical
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* section. It pulls a free event from the queue, fills it, and puts it back onto
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* the tail of qDoneCB. If the critical section is held, it then transfers the
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* entire contents of qDoneCB to qDone.
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*
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* These transfers are not time consuming; they are merely the manipulation of
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* a couple of pointers.
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*/
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struct OPENHANDLE {
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LINKNODE link; /* @field LINKNODE | link |
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Holds this handle in gOpenHandles */
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NPLINKNODE pInstanceList; /* @field NPLINKLINK | pInstanceList |
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Points to the first element in the list of open handle instances using
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this device. */
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UINT uReferenceCount; /* @field UINT | uReferenceCount |
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The number of clients using this device; i.e., the number of elements in the
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pInstanceList. */
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UINT uActiveCount; /* @field UINT | uActiveCount |
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The number of clients that have activated this device */
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UINT id; /* @field UINT | id | The MMSYSTEM device ID of this device */
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WORD wFlags; /* @field WORD | wFlags | Some combination of the following flags:
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@flag OH_F_MIDIIN | This device is a MIDI input device
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@flag OH_F_CLOSING | This device is being closed.
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@flag OH_F_SHARE | This device is opened in shared mode */
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HMIDIOUT hmo; /* @field HMIDIOUT | hmo | MIDI output handle if an output device */
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HMIDIIN hmi; /* @field HMIDIIN | hmi | MIDI input handle if an input device */
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WORD wCritSect; /* @field WORD | wCritSect | Critical section protecting protected queues */
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DWORD msStartTime; /* @field DWORD | msStartTime | <f timeGetTime()> Time we started input */
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EVENTQUEUE qPlay; /* @field EVENTQUEUE | qPlay |
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Output: Queue of events to play (protected) */
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EVENTQUEUE qDone; /* @field EVENTQUEUE | qDone |
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Input/Output: Events already done (played or received) (protected) */
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EVENTQUEUE qFree; /* @field EVENTQUEUE | qFree |
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Input: Queue of free events (protected) */
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EVENTQUEUE qFreeCB; /* @field EVENTQUEUE | qFreeCB |
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Input: Queue of free events used by callback */
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EVENTQUEUE qDoneCB; /* @field EVENTQUEUE | qDoneCB |
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Input: Queue of received events used by callback */
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WORD wPostedSysExBuffers; /* @field WORD | cPostedSysExBuffers |
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Input: Buffers posted in MMSYSTEM for recording SysEx */
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};
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#define CLASS_MIDI 0 /* dwEventClass */
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/* Close to our page size
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*/
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#define SEG_SIZE 4096
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#define C_PER_SEG ((SEG_SIZE - sizeof(SEGHDR)) / (sizeof(EVENT) + sizeof(DWORD)))
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#define SEG_F_4BYTE_EVENTS 0x0001
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typedef struct SEGHDR SEGHDR;
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typedef struct SEGHDR FAR * LPSEGHDR;
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/* @struct The header for one segment of allocated memory
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*/
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struct SEGHDR {
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WORD selNext; /* @field WORD | selNext |
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The selector of the next block of memory in the allocated list */
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WORD hSeg; /* @field WORD | hSeg |
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The global handle of the memory block */
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WORD wFlags; /* @field WORD | wFlags |
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A bitwise combination of the following flags:
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@flag SEG_F_4BYTE_EVENTS | This segment contains multiple
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channel messages */
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WORD cbSeg; /* @field WORD | cbSeg |
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The size of the segment, less the <c SEGHDR> */
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};
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/* @struct Thru information for one channel
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*
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* @comm
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*
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* Each input device handle instance contains an array of 16 of these structures containing
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* the thru destination for data that arrives on that channel.
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*
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*/
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struct THRUCHANNEL {
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WORD wChannel; /* @field WORD | wChannel | The destination channel */
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NPOPENHANDLEINSTANCE pohi; /* @field NPOPENHANDLEINSTANCE | pohi | The output handle instance
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to receive the thru'ed data. */
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};
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/* globals */
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extern HINSTANCE ghInst;
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extern NPLINKNODE gOpenHandleInstanceList;
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extern NPLINKNODE gOpenHandleList;
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extern UINT gcOpenInputDevices;
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extern UINT gcOpenOutputDevices;
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/* device.c */
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#define VA_F_INPUT 0x0001
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#define VA_F_OUTPUT 0x0002
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#define VA_F_EITHER (VA_F_INPUT | VA_F_OUTPUT)
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extern VOID PASCAL DeviceOnLoad(VOID);
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extern MMRESULT PASCAL CloseLegacyDeviceI(NPOPENHANDLEINSTANCE pohi);
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extern MMRESULT PASCAL ActivateLegacyDeviceI(NPOPENHANDLEINSTANCE pohi, BOOL fActivate);
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extern BOOL PASCAL IsValidHandle(HANDLE h, WORD wType, NPOPENHANDLEINSTANCE FAR *lppohi);
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extern VOID PASCAL CloseDevicesForTask(WORD wTask);
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/* list.c */
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extern VOID PASCAL ListInsert(NPLINKNODE *pHead, NPLINKNODE pNode);
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extern VOID PASCAL ListRemove(NPLINKNODE *pHead, NPLINKNODE pNode);
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/* eventq.c */
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extern VOID PASCAL QueueInit(NPEVENTQUEUE pQueue);
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extern VOID PASCAL QueueAppend(NPEVENTQUEUE pQueue, LPEVENT pEvent);
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extern VOID PASCAL QueueCat(NPEVENTQUEUE pDest, NPEVENTQUEUE pSource);
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extern LPEVENT PASCAL QueueRemoveFromFront(NPEVENTQUEUE pQueue);
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#define QUEUE_FILTER_KEEP (0)
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#define QUEUE_FILTER_REMOVE (1)
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typedef int (PASCAL *PFNQUEUEFILTER)(LPEVENT pEvent, DWORD dwInstance);
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extern VOID PASCAL QueueFilter(NPEVENTQUEUE pQueue, DWORD dwInstance, PFNQUEUEFILTER pfnFilter);
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extern LPEVENT PASCAL QueuePeek(NPEVENTQUEUE pQueue);
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#ifdef DEBUG
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#define AssertQueueValid(pQueue) _AssertQueueValid((pQueue), __FILE__, __LINE__)
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extern VOID PASCAL _AssertQueueValid(NPEVENTQUEUE pQueue, LPSTR pstrFile, UINT uLine);
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#else
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#define AssertQueueValid
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#endif
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/* locks.c */
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#define LOCK_F_INPUT 0x0001
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#define LOCK_F_OUTPUT 0x0002
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#define LOCK_F_COMMON 0x0004
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extern VOID PASCAL LockCode(WORD wFlags);
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extern VOID PASCAL UnlockCode(WORD wFlags);
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/* dmhelp.asm */
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extern VOID PASCAL InitializeCriticalSection(LPWORD lpwCritSect);
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#define CS_NONBLOCKING (0)
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#define CS_BLOCKING (1)
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extern WORD PASCAL EnterCriticalSection(LPWORD lpwCritSect, WORD fBlocking);
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extern VOID PASCAL LeaveCriticalSection(LPWORD lpwCritSect);
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extern WORD PASCAL DisableInterrupts(VOID);
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extern VOID PASCAL RestoreInterrupts(WORD wIntStat);
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extern WORD PASCAL InterlockedIncrement(LPWORD pw);
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extern WORD PASCAL InterlockedDecrement(LPWORD pw);
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extern DWORD PASCAL QuadwordDiv(QUADWORD qwDividend, DWORD dwDivisor);
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extern VOID PASCAL QuadwordMul(DWORD m1, DWORD m2, LPQUADWORD qwResult);
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extern BOOL PASCAL QuadwordLT(QUADWORD qwLValue, QUADWORD qwRValue);
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extern VOID PASCAL QuadwordAdd(QUADWORD qwOp1, QUADWORD qwOp2, LPQUADWORD lpqwResult);
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/* alloc.c */
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extern VOID PASCAL AllocOnLoad(VOID);
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extern VOID PASCAL AllocOnExit(VOID);
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extern LPEVENT PASCAL AllocEvent(DWORD msTime, QUADWORD rtTime, WORD cbEvent);
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extern VOID PASCAL FreeEvent(LPEVENT lpEvent);
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/* midiout.c */
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extern VOID PASCAL MidiOutOnLoad(VOID);
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extern VOID PASCAL MidiOutOnExit(VOID);
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extern MMRESULT PASCAL MidiOutOnOpen(NPOPENHANDLEINSTANCE pohi);
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extern VOID PASCAL MidiOutOnClose(NPOPENHANDLEINSTANCE pohi);
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extern MMRESULT PASCAL MidiOutOnActivate(NPOPENHANDLEINSTANCE pohi);
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extern MMRESULT PASCAL MidiOutOnDeactivate(NPOPENHANDLEINSTANCE pohi);
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extern VOID PASCAL SetOutputTimerRes(BOOL fOnOpen);
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extern VOID PASCAL FreeDoneHandleEvents(NPOPENHANDLE poh, BOOL fClosing);
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extern VOID PASCAL MidiOutThru(NPOPENHANDLEINSTANCE pohi, DWORD dwMessage);
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/* midiin.c */
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extern VOID PASCAL MidiInOnLoad(VOID);
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extern VOID PASCAL MidiInOnExit(VOID);
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extern MMRESULT PASCAL MidiInOnOpen(NPOPENHANDLEINSTANCE pohi);
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extern VOID PASCAL MidiInOnClose(NPOPENHANDLEINSTANCE pohi);
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extern MMRESULT PASCAL MidiInOnActivate(NPOPENHANDLEINSTANCE pohi);
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extern MMRESULT PASCAL MidiInOnDeactivate(NPOPENHANDLEINSTANCE pohi);
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extern VOID PASCAL MidiInRefillFreeLists(VOID);
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extern VOID PASCAL MidiInUnthruToInstance(NPOPENHANDLEINSTANCE pohi);
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extern VOID PASCAL FreeAllQueueEvents(NPEVENTQUEUE peq);
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/* mmdevldr.asm */
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extern MMRESULT CDECL SetWin32Event(DWORD dwVxDEvent); /* Must be CDECL! */
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/* timerwnd.c */
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extern BOOL PASCAL CreateTimerTask(VOID);
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extern VOID PASCAL DestroyTimerTask(VOID);
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#endif
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