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+{ $Header: /MidiComp/MIDIDEFS.PAS 2 10/06/97 7:33 Davec $ }
+
+{ Written by David Churcher <dchurcher@cix.compulink.co.uk>,
+ released to the public domain. }
+
+
+{ Common definitions used by DELPHMID.DPR and the MIDI components.
+ This must be a separate unit to prevent large chunks of the VCL being
+ linked into the DLL. }
+unit Mididefs;
+
+interface
+
+uses WinProcs, WinTypes, MMsystem, Circbuf;
+
+type
+
+ {-------------------------------------------------------------------}
+ { This is the information about the control that must be accessed by
+ the MIDI input callback function in the DLL at interrupt time }
+ PMidiCtlInfo = ^TMidiCtlInfo;
+ TMidiCtlInfo = record
+ hMem: THandle; { Memory handle for this record }
+ PBuffer: PCircularBuffer; { Pointer to the MIDI input data buffer }
+ hWindow: HWnd; { Control's window handle }
+ SysexOnly: Boolean; { Only process System Exclusive input }
+ end;
+
+ { Information for the output timer callback function, also required at
+ interrupt time. }
+ PMidiOutTimerInfo = ^TMidiOutTimerInfo;
+ TMidiOutTimerInfo = record
+ hMem: THandle; { Memory handle for this record }
+ PBuffer: PCircularBuffer; { Pointer to MIDI output data buffer }
+ hWindow: HWnd; { Control's window handle }
+ TimeToNextEvent: DWORD; { Delay to next event after timer set }
+ MIDIHandle: HMidiOut; { MIDI handle to send output to
+ (copy of component's FMidiHandle property) }
+ PeriodMin: Word; { Multimedia timer minimum period supported }
+ PeriodMax: Word; { Multimedia timer maximum period supported }
+ TimerId: Word; { Multimedia timer ID of current event }
+ end;
+
+implementation
+
+
+end.