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Diffstat (limited to 'Medley/src/lib/midi/MIDITYPE.PAS')
-rw-r--r-- | Medley/src/lib/midi/MIDITYPE.PAS | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/Medley/src/lib/midi/MIDITYPE.PAS b/Medley/src/lib/midi/MIDITYPE.PAS new file mode 100644 index 00000000..45b50820 --- /dev/null +++ b/Medley/src/lib/midi/MIDITYPE.PAS @@ -0,0 +1,90 @@ +{ $Header: /MidiComp/MIDITYPE.PAS 2 10/06/97 7:33 Davec $ } + +{ Written by David Churcher <dchurcher@cix.compulink.co.uk>, + released to the public domain. } + + +unit Miditype; + +interface + +{$IFDEF FPC} + {$MODE Delphi} + {$H+} // use long strings +{$ENDIF} + +uses + Classes, + Windows, + Messages, + MMSystem, + MidiDefs, + Circbuf; + +type + {-------------------------------------------------------------------} + { A MIDI input/output event } + TMyMidiEvent = class(TPersistent) + public + MidiMessage: Byte; { MIDI message status byte } + Data1: Byte; { MIDI message data 1 byte } + Data2: Byte; { MIDI message data 2 byte } + Time: DWORD; { Time in ms since midiInOpen } + SysexLength: Word; { Length of sysex data (0 if none) } + Sysex: PChar; { Pointer to sysex data buffer } + destructor Destroy; override; { Frees sysex data buffer if nec. } + end; + PMyMidiEvent = ^TMyMidiEvent; + + {-------------------------------------------------------------------} + { Encapsulates the MIDIHDR with its memory handle and sysex buffer } + PMyMidiHdr = ^TMyMidiHdr; + TMyMidiHdr = class(TObject) + public + hdrHandle: THandle; + hdrPointer: PMIDIHDR; + sysexHandle: THandle; + sysexPointer: Pointer; + constructor Create(BufferSize: Word); + destructor Destroy; override; + end; + +implementation + +{-------------------------------------------------------------------} +{ Free any sysex buffer associated with the event } +destructor TMyMidiEvent.Destroy; +begin + if (Sysex <> Nil) then + Freemem(Sysex, SysexLength); + + inherited Destroy; +end; + +{-------------------------------------------------------------------} +{ Allocate memory for the sysex header and buffer } +constructor TMyMidiHdr.Create(BufferSize:Word); +begin + inherited Create; + + if BufferSize > 0 then + begin + hdrPointer := GlobalSharedLockedAlloc(sizeof(TMIDIHDR), hdrHandle); + sysexPointer := GlobalSharedLockedAlloc(BufferSize, sysexHandle); + + hdrPointer^.lpData := sysexPointer; + hdrPointer^.dwBufferLength := BufferSize; + end; +end; + +{-------------------------------------------------------------------} +destructor TMyMidiHdr.Destroy; +begin + GlobalSharedLockedFree( hdrHandle, hdrPointer ); + GlobalSharedLockedFree( sysexHandle, sysexPointer ); + inherited Destroy; +end; + + + +end. |