diff options
Diffstat (limited to 'VideoPreview/src/lib/midi')
| -rw-r--r-- | VideoPreview/src/lib/midi/CIRCBUF.PAS | 183 | ||||
| -rw-r--r-- | VideoPreview/src/lib/midi/DELPHMCB.PAS | 140 | ||||
| -rw-r--r-- | VideoPreview/src/lib/midi/MIDIDEFS.PAS | 55 | ||||
| -rw-r--r-- | VideoPreview/src/lib/midi/MIDITYPE.PAS | 90 | ||||
| -rw-r--r-- | VideoPreview/src/lib/midi/MidiFile.pas | 968 | ||||
| -rw-r--r-- | VideoPreview/src/lib/midi/MidiScope.pas | 198 | ||||
| -rw-r--r-- | VideoPreview/src/lib/midi/Midicons.pas | 47 | ||||
| -rw-r--r-- | VideoPreview/src/lib/midi/Midiin.pas | 720 | ||||
| -rw-r--r-- | VideoPreview/src/lib/midi/Midiout.pas | 612 | ||||
| -rw-r--r-- | VideoPreview/src/lib/midi/demo/MidiTest.dfm | bin | 0 -> 1872 bytes | |||
| -rw-r--r-- | VideoPreview/src/lib/midi/demo/MidiTest.pas | 249 | ||||
| -rw-r--r-- | VideoPreview/src/lib/midi/demo/Project1.dpr | 13 | ||||
| -rw-r--r-- | VideoPreview/src/lib/midi/demo/Project1.res | bin | 0 -> 876 bytes | |||
| -rw-r--r-- | VideoPreview/src/lib/midi/midiComp.cfg | 35 | ||||
| -rw-r--r-- | VideoPreview/src/lib/midi/midiComp.dpk | 45 | ||||
| -rw-r--r-- | VideoPreview/src/lib/midi/midiComp.res | bin | 0 -> 876 bytes | |||
| -rw-r--r-- | VideoPreview/src/lib/midi/readme.txt | 60 |
17 files changed, 3415 insertions, 0 deletions
diff --git a/VideoPreview/src/lib/midi/CIRCBUF.PAS b/VideoPreview/src/lib/midi/CIRCBUF.PAS new file mode 100644 index 00000000..3ceb4c6e --- /dev/null +++ b/VideoPreview/src/lib/midi/CIRCBUF.PAS @@ -0,0 +1,183 @@ +{ $Header: /MidiComp/CIRCBUF.PAS 2 10/06/97 7:33 Davec $ } + +{ Written by David Churcher <dchurcher@cix.compulink.co.uk>, + released to the public domain. } + + +{ A First-In First-Out circular buffer. + Port of circbuf.c from Microsoft's Windows MIDI monitor example. + I did do a version of this as an object (see Rev 1.1) but it was getting too + complicated and I couldn't see any real benefits to it so I dumped it + for an ordinary memory buffer with pointers. + + This unit is a bit C-like, everything is done with pointers and extensive + use is made of the undocumented feature of the Inc() function that + increments pointers by the size of the object pointed to. + All of this could probably be done using Pascal array notation with + range-checking turned off, but I'm not sure it's worth it. +} + +Unit Circbuf; + +interface + +{$IFDEF FPC} + {$MODE Delphi} + {$H+} // use long strings +{$ENDIF} + +Uses + Windows, + MMSystem; + +type + { MIDI input event } + TMidiBufferItem = record + timestamp: DWORD; { Timestamp in milliseconds after midiInStart } + data: DWORD; { MIDI message received } + sysex: PMidiHdr; { Pointer to sysex MIDIHDR, nil if not sysex } + end; + PMidiBufferItem = ^TMidiBufferItem; + + { MIDI input buffer } + TCircularBuffer = record + RecordHandle: HGLOBAL; { Windows memory handle for this record } + BufferHandle: HGLOBAL; { Windows memory handle for the buffer } + pStart: PMidiBufferItem; { ptr to start of buffer } + pEnd: PMidiBufferItem; { ptr to end of buffer } + pNextPut: PMidiBufferItem; { next location to fill } + pNextGet: PMidiBufferItem; { next location to empty } + Error: Word; { error code from MMSYSTEM functions } + Capacity: Word; { buffer size (in TMidiBufferItems) } + EventCount: Word; { Number of events in buffer } + end; + + PCircularBuffer = ^TCircularBuffer; + +function GlobalSharedLockedAlloc( Capacity: Word; var hMem: HGLOBAL ): Pointer; +procedure GlobalSharedLockedFree( hMem: HGLOBAL; ptr: Pointer ); + +function CircbufAlloc( Capacity: Word ): PCircularBuffer; +procedure CircbufFree( PBuffer: PCircularBuffer ); +function CircbufRemoveEvent( PBuffer: PCircularBuffer ): Boolean; +function CircbufReadEvent( PBuffer: PCircularBuffer; PEvent: PMidiBufferItem ): Boolean; +{ Note: The PutEvent function is in the DLL } + +implementation + +{ Allocates in global shared memory, returns pointer and handle } +function GlobalSharedLockedAlloc( Capacity: Word; var hMem: HGLOBAL ): Pointer; +var + ptr: Pointer; +begin + { Allocate the buffer memory } + hMem := GlobalAlloc(GMEM_SHARE Or GMEM_MOVEABLE Or GMEM_ZEROINIT, Capacity ); + + if (hMem = 0) then + ptr := Nil + else + begin + ptr := GlobalLock(hMem); + if (ptr = Nil) then + GlobalFree(hMem); + end; + + GlobalSharedLockedAlloc := Ptr; +end; + +procedure GlobalSharedLockedFree( hMem: HGLOBAL; ptr: Pointer ); +begin + if (hMem <> 0) then + begin + GlobalUnlock(hMem); + GlobalFree(hMem); + end; +end; + +function CircbufAlloc( Capacity: Word ): PCircularBuffer; +var + NewCircularBuffer: PCircularBuffer; + NewMIDIBuffer: PMidiBufferItem; + hMem: HGLOBAL; +begin + { TODO: Validate circbuf size, <64K } + NewCircularBuffer := + GlobalSharedLockedAlloc( Sizeof(TCircularBuffer), hMem ); + if (NewCircularBuffer <> Nil) then + begin + NewCircularBuffer^.RecordHandle := hMem; + NewMIDIBuffer := + GlobalSharedLockedAlloc( Capacity * Sizeof(TMidiBufferItem), hMem ); + if (NewMIDIBuffer = Nil) then + begin + { TODO: Exception here? } + GlobalSharedLockedFree( NewCircularBuffer^.RecordHandle, + NewCircularBuffer ); + NewCircularBuffer := Nil; + end + else + begin + NewCircularBuffer^.pStart := NewMidiBuffer; + { Point to item at end of buffer } + NewCircularBuffer^.pEnd := NewMidiBuffer; + Inc(NewCircularBuffer^.pEnd, Capacity); + { Start off the get and put pointers in the same position. These + will get out of sync as the interrupts start rolling in } + NewCircularBuffer^.pNextPut := NewMidiBuffer; + NewCircularBuffer^.pNextGet := NewMidiBuffer; + NewCircularBuffer^.Error := 0; + NewCircularBuffer^.Capacity := Capacity; + NewCircularBuffer^.EventCount := 0; + end; + end; + CircbufAlloc := NewCircularBuffer; +end; + +procedure CircbufFree( pBuffer: PCircularBuffer ); +begin + if (pBuffer <> Nil) then + begin + GlobalSharedLockedFree(pBuffer^.BufferHandle, pBuffer^.pStart); + GlobalSharedLockedFree(pBuffer^.RecordHandle, pBuffer); + end; +end; + +{ Reads first event in queue without removing it. + Returns true if successful, False if no events in queue } +function CircbufReadEvent( PBuffer: PCircularBuffer; PEvent: PMidiBufferItem ): Boolean; +var + PCurrentEvent: PMidiBufferItem; +begin + if (PBuffer^.EventCount <= 0) then + CircbufReadEvent := False + else + begin + PCurrentEvent := PBuffer^.PNextget; + + { Copy the object from the "tail" of the buffer to the caller's object } + PEvent^.Timestamp := PCurrentEvent^.Timestamp; + PEvent^.Data := PCurrentEvent^.Data; + PEvent^.Sysex := PCurrentEvent^.Sysex; + CircbufReadEvent := True; + end; +end; + +{ Remove current event from the queue } +function CircbufRemoveEvent(PBuffer: PCircularBuffer): Boolean; +begin + if (PBuffer^.EventCount > 0) then + begin + Dec( Pbuffer^.EventCount); + + { Advance the buffer pointer, with wrap } + Inc( Pbuffer^.PNextGet ); + If (PBuffer^.PNextGet = PBuffer^.PEnd) then + PBuffer^.PNextGet := PBuffer^.PStart; + + CircbufRemoveEvent := True; + end + else + CircbufRemoveEvent := False; +end; + +end. diff --git a/VideoPreview/src/lib/midi/DELPHMCB.PAS b/VideoPreview/src/lib/midi/DELPHMCB.PAS new file mode 100644 index 00000000..ef0d5451 --- /dev/null +++ b/VideoPreview/src/lib/midi/DELPHMCB.PAS @@ -0,0 +1,140 @@ +{ $Header: /MidiComp/DELPHMCB.PAS 2 10/06/97 7:33 Davec $ } + +{MIDI callback for Delphi, was DLL for Delphi 1} + +unit Delphmcb; + +{ These segment options required for the MIDI callback functions } +{$IFNDEF FPC} +{$C PRELOAD FIXED PERMANENT} +{$ENDIF} + +interface + +{$IFDEF FPC} + {$MODE Delphi} + {$H+} // use long strings +{$ENDIF} + +uses + Windows, + MMsystem, + Circbuf, + MidiDefs, + MidiCons; + +procedure midiHandler( + hMidiIn: HMidiIn; + wMsg: UINT; + dwInstance: DWORD; + dwParam1: DWORD; + dwParam2: DWORD); stdcall; export; +function CircbufPutEvent(PBuffer: PCircularBuffer; PTheEvent: PMidiBufferItem): Boolean; stdcall; export; + +implementation + +{ Add an event to the circular input buffer. } +function CircbufPutEvent(PBuffer: PCircularBuffer; PTheEvent: PMidiBufferItem): Boolean; stdcall; +begin + If (PBuffer^.EventCount < PBuffer^.Capacity) Then + begin + Inc(Pbuffer^.EventCount); + + { Todo: better way of copying this record } + with PBuffer^.PNextput^ do + begin + Timestamp := PTheEvent^.Timestamp; + Data := PTheEvent^.Data; + Sysex := PTheEvent^.Sysex; + end; + + { Move to next put location, with wrap } + Inc(Pbuffer^.PNextPut); + If (PBuffer^.PNextPut = PBuffer^.PEnd) then + PBuffer^.PNextPut := PBuffer^.PStart; + + CircbufPutEvent := True; + end + else + CircbufPutEvent := False; +end; + +{ This is the callback function specified when the MIDI device was opened + by midiInOpen. It's called at interrupt time when MIDI input is seen + by the MIDI device driver(s). See the docs for midiInOpen for restrictions + on the Windows functions that can be called in this interrupt. } +procedure midiHandler( + hMidiIn: HMidiIn; + wMsg: UINT; + dwInstance: DWORD; + dwParam1: DWORD; + dwParam2: DWORD); stdcall; +var + thisEvent: TMidiBufferItem; + thisCtlInfo: PMidiCtlInfo; + thisBuffer: PCircularBuffer; +Begin + case wMsg of + + mim_Open: {nothing}; + + mim_Error: {TODO: handle (message to trigger exception?) }; + + mim_Data, mim_Longdata, mim_Longerror: + { Note: mim_Longerror included because there's a bug in the Maui + input driver that sends MIM_LONGERROR for subsequent buffers when + the input buffer is smaller than the sysex block being received } + + begin + { TODO: Make filtered messages customisable, I'm sure someone wants to + do something with MTC! } + if (dwParam1 <> MIDI_ACTIVESENSING) and + (dwParam1 <> MIDI_TIMINGCLOCK) then + begin + + { The device driver passes us the instance data pointer we + specified for midiInOpen. Use this to get the buffer address + and window handle for the MIDI control } + thisCtlInfo := PMidiCtlInfo(dwInstance); + thisBuffer := thisCtlInfo^.PBuffer; + + { Screen out short messages if we've been asked to } + if ((wMsg <> mim_Data) or (thisCtlInfo^.SysexOnly = False)) + and (thisCtlInfo <> Nil) and (thisBuffer <> Nil) then + begin + with thisEvent do + begin + timestamp := dwParam2; + if (wMsg = mim_Longdata) or + (wMsg = mim_Longerror) then + begin + data := 0; + sysex := PMidiHdr(dwParam1); + end + else + begin + data := dwParam1; + sysex := Nil; + end; + end; + if CircbufPutEvent( thisBuffer, @thisEvent ) then + { Send a message to the control to say input's arrived } + PostMessage(thisCtlInfo^.hWindow, mim_Data, 0, 0) + else + { Buffer overflow } + PostMessage(thisCtlInfo^.hWindow, mim_Overflow, 0, 0); + end; + end; + end; + + mom_Done: { Sysex output complete, dwParam1 is pointer to MIDIHDR } + begin + { Notify the control that its sysex output is finished. + The control should call midiOutUnprepareHeader before freeing the buffer } + PostMessage(PMidiCtlInfo(dwInstance)^.hWindow, mom_Done, 0, dwParam1); + end; + + end; { Case } +end; + +end. diff --git a/VideoPreview/src/lib/midi/MIDIDEFS.PAS b/VideoPreview/src/lib/midi/MIDIDEFS.PAS new file mode 100644 index 00000000..4afe56ef --- /dev/null +++ b/VideoPreview/src/lib/midi/MIDIDEFS.PAS @@ -0,0 +1,55 @@ +{ $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 + +{$IFDEF FPC} + {$MODE Delphi} + {$H+} // use long strings +{$ENDIF} + +uses + Windows, + 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. diff --git a/VideoPreview/src/lib/midi/MIDITYPE.PAS b/VideoPreview/src/lib/midi/MIDITYPE.PAS new file mode 100644 index 00000000..45b50820 --- /dev/null +++ b/VideoPreview/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. diff --git a/VideoPreview/src/lib/midi/MidiFile.pas b/VideoPreview/src/lib/midi/MidiFile.pas new file mode 100644 index 00000000..acf44c04 --- /dev/null +++ b/VideoPreview/src/lib/midi/MidiFile.pas @@ -0,0 +1,968 @@ +{ + Load a midifile and get access to tracks and events + I did build this component to convert midifiles to wave files + or play the files on a software synthesizer which I'm currenly + building. + + version 1.0 first release + + version 1.1 + added some function + function KeyToStr(key : integer) : string; + function MyTimeToStr(val : integer) : string; + Bpm can be set to change speed + + version 1.2 + added some functions + function GetTrackLength:integer; + function Ready: boolean; + + version 1.3 + update by Chulwoong, + He knows how to use the MM timer, the timing is much better now, thank you + + for comments/bugs + F.Bouwmans + fbouwmans@spiditel.nl + + if you think this component is nice and you use it, sent me a short email. + I've seen that other of my components have been downloaded a lot, but I've + got no clue wether they are actually used. + Don't worry because you are free to use these components + + Timing has improved, however because the messages are handled by the normal + windows message loop (of the main window) it is still influenced by actions + done on the window (minimize/maximize ..). + Use of a second thread with higher priority which only handles the + timer message should increase performance. If somebody knows such a component + which is freeware please let me know. + + interface description: + + procedure ReadFile: + actually read the file which is set in Filename + + function GetTrack(index: integer) : TMidiTrack; + + property Filename + set/read filename of midifile + + property NumberOfTracks + read number of tracks in current file + + property TicksPerQuarter: integer + ticks per quarter, tells how to interpret the time value in midi events + + property FileFormat: TFileFormat + tells the format of the current midifile + + property Bpm:integer + tells Beats per minut + + property OnMidiEvent:TOnMidiEvent + called while playing for each midi event + + procedure StartPlaying; + start playing the current loaded midifile from the beginning + + procedure StopPlaying; + stop playing the current midifile + + procedure PlayToTime(time : integer); + if playing yourself then events from last time to this time are produced + + + function KeyToStr(key : integer) : string; + give note string on key value: e.g. C4 + + function MyTimeToStr(val : integer) : string; + give time string from msec time + + function GetTrackLength:integer; + gives the track lenght in msec (assuming the bpm at the start oof the file) + + function Ready: boolean; + now you can check wether the playback is finished + +} + +unit MidiFile; + +interface + +{$IFDEF FPC} + {$MODE Delphi} + {$H+} // use long strings +{$ENDIF} + +uses + Windows, + Messages, + Classes, + {$IFDEF FPC} + WinAllocation, + {$ENDIF} + SysUtils, + UPath; + +type + TChunkType = (illegal, header, track); + TFileFormat = (single, multi_synch, multi_asynch); + PByte = ^byte; + + TMidiEvent = record + event: byte; + data1: byte; + data2: byte; + str: string; + dticks: integer; + time: integer; + mtime: integer; + len: integer; + end; + PMidiEvent = ^TMidiEvent; + + TOnMidiEvent = procedure(event: PMidiEvent) of object; + TEvent = procedure of object; + + TMidiTrack = class(TObject) + protected + events: TList; + name: string; + instrument: string; + currentTime: integer; + currentPos: integer; + ready: boolean; + trackLenght: integer; + procedure checkReady; + public + OnMidiEvent: TOnMidiEvent; + OnTrackReady: TEvent; + constructor Create; + destructor Destroy; override; + + procedure Rewind(pos: integer); + procedure PlayUntil(pos: integer); + procedure GoUntil(pos: integer); + + procedure putEvent(event: PMidiEvent); + function getEvent(index: integer): PMidiEvent; + function getName: string; + function getInstrument: string; + function getEventCount: integer; + function getCurrentTime: integer; + function getTrackLength: integer; + function isReady:boolean; + end; + + TMidiFile = class(TComponent) + private + { Private declarations } + procedure MidiTimer(sender : TObject); + procedure WndProc(var Msg : TMessage); + protected + { Protected declarations } + midiFile: TBinaryFileStream; + chunkType: TChunkType; + chunkLength: integer; + chunkData: PByte; + chunkIndex: PByte; + chunkEnd: PByte; + FPriority: DWORD; + + // midi file attributes + FFileFormat: TFileFormat; + numberTracks: integer; + deltaTicks: integer; + FBpm: integer; + FBeatsPerMeasure: integer; + FusPerTick: double; + FFilename: IPath; + + Tracks: TList; + currentTrack: TMidiTrack; + FOnMidiEvent: TOnMidiEvent; + FOnUpdateEvent: TNotifyEvent; + + // playing attributes + playing: boolean; + PlayStartTime: integer; + currentTime: integer; // Current playtime in msec + currentPos: Double; // Current Position in ticks + + procedure OnTrackReady; + procedure SetFilename(val: IPath); + procedure ReadChunkHeader; + procedure ReadChunkContent; + procedure ReadChunk; + procedure ProcessHeaderChunk; + procedure ProcessTrackChunk; + function ReadVarLength: integer; + function ReadString(l: integer): string; + procedure SetOnMidiEvent(handler: TOnMidiEvent); + procedure SetBpm(val: integer); + public + { Public declarations } + constructor Create(AOwner: TComponent); override; + destructor Destroy; override; + + procedure ReadFile; + function GetTrack(index: integer): TMidiTrack; + + procedure StartPlaying; + procedure StopPlaying; + procedure ContinuePlaying; + + procedure PlayToTime(time: integer); + procedure GoToTime(time: integer); + function GetCurrentTime: integer; + function GetFusPerTick : Double; + function GetTrackLength:integer; + function Ready: boolean; + published + { Published declarations } + property Filename: IPath read FFilename write SetFilename; + property NumberOfTracks: integer read numberTracks; + property TicksPerQuarter: integer read deltaTicks; + property FileFormat: TFileFormat read FFileFormat; + property Bpm: integer read FBpm write SetBpm; + property OnMidiEvent: TOnMidiEvent read FOnMidiEvent write SetOnMidiEvent; + property OnUpdateEvent: TNotifyEvent read FOnUpdateEvent write FOnUpdateEvent; + end; + +function KeyToStr(key: integer): string; +function MyTimeToStr(val: integer): string; +procedure Register; + +implementation + +uses mmsystem; + +type +{$IFDEF FPC} + TTimerProc = TTIMECALLBACK; + TTimeCaps = TIMECAPS; +{$ELSE} + TTimerProc = TFNTimeCallBack; +{$ENDIF} + +const TIMER_RESOLUTION=10; +const WM_MULTIMEDIA_TIMER=WM_USER+127; + +var MIDIFileHandle : HWND; + TimerProc : TTimerProc; + MIDITimerID : Integer; + TimerPeriod : Integer; + +procedure TimerCallBackProc(uTimerID,uMsg: Cardinal; dwUser,dwParam1,dwParam2:DWORD);stdcall; +begin + PostMessage(HWND(dwUser),WM_MULTIMEDIA_TIMER,0,0); +end; + +procedure SetMIDITimer; + var TimeCaps : TTimeCaps; +begin + timeGetDevCaps(@TimeCaps,SizeOf(TimeCaps)); + if TIMER_RESOLUTION < TimeCaps.wPeriodMin then + TimerPeriod:=TimeCaps.wPeriodMin + else if TIMER_RESOLUTION > TimeCaps.wPeriodMax then + TimerPeriod:=TimeCaps.wPeriodMax + else + TimerPeriod:=TIMER_RESOLUTION; + + timeBeginPeriod(TimerPeriod); + MIDITimerID:=timeSetEvent(TimerPeriod,TimerPeriod,TimerProc, + DWORD(MIDIFileHandle),TIME_PERIODIC); + if MIDITimerID=0 then + timeEndPeriod(TimerPeriod); +end; + +procedure KillMIDITimer; +begin + timeKillEvent(MIDITimerID); + timeEndPeriod(TimerPeriod); +end; + +constructor TMidiTrack.Create; +begin + inherited Create; + events := TList.Create; + currentTime := 0; + currentPos := 0; +end; + +destructor TMidiTrack.Destroy; +var + i: integer; +begin + for i := 0 to events.count - 1 do + Dispose(PMidiEvent(events.items[i])); + events.Free; + inherited Destroy; +end; + +procedure TMidiTRack.putEvent(event: PMidiEvent); +var + command: integer; + i: integer; + pevent: PMidiEvent; +begin + if (event.event = $FF) then + begin + if (event.data1 = 3) then + name := event.str; + if (event.data1 = 4) then + instrument := event.str; + end; + currentTime := currentTime + event.dticks; + event.time := currentTime; // for the moment just add dticks + event.len := 0; + events.add(TObject(event)); + command := event.event and $F0; + + if ((command = $80) // note off + or ((command = $90) and (event.data2 = 0))) //note on with speed 0 + then + begin + // this is a note off, try to find the accompanion note on + command := event.event or $90; + i := events.count - 2; + while i >= 0 do + begin + pevent := PMidiEvent(events[i]); + if (pevent.event = command) and + (pevent.data1 = event.data1) + then + begin + pevent.len := currentTIme - pevent.time; + i := 0; + event.len := -1; + end; + dec(i); + end; + end; +end; + +function TMidiTrack.getName: string; +begin + result := name; +end; + +function TMidiTrack.getInstrument: string; +begin + result := instrument; +end; + +function TMiditrack.getEventCount: integer; +begin + result := events.count; +end; + +function TMiditrack.getEvent(index: integer): PMidiEvent; +begin + if ((index < events.count) and (index >= 0)) then + result := events[index] + else + result := nil; +end; + +function TMiditrack.getCurrentTime: integer; +begin + result := currentTime; +end; + +procedure TMiditrack.Rewind(pos: integer); +begin + if currentPos = events.count then + dec(currentPos); + while ((currentPos > 0) and + (PMidiEvent(events[currentPos]).time > pos)) + do + begin + dec(currentPos); + end; + checkReady; +end; + +procedure TMiditrack.PlayUntil(pos: integer); +begin + if assigned(OnMidiEvent) then + begin + while ((currentPos < events.count) and + (PMidiEvent(events[currentPos]).time < pos)) do + begin + OnMidiEvent(PMidiEvent(events[currentPos])); + inc(currentPos); + end; + end; + checkReady; +end; + +procedure TMidiTrack.GoUntil(pos: integer); +begin + while ((currentPos < events.count) and + (PMidiEvent(events[currentPos]).time < pos)) do + begin + inc(currentPos); + end; + checkReady; +end; + +procedure TMidiTrack.checkReady; +begin + if currentPos >= events.count then + begin + ready := true; + if assigned(OnTrackReady) then + OnTrackReady; + end + else + ready := false; +end; + +function TMidiTrack.getTrackLength: integer; +begin + result := PMidiEvent(events[events.count-1]).time +end; + +function TMidiTrack.isReady: boolean; +begin + result := ready; +end; + +constructor TMidifile.Create(AOwner: TComponent); +begin + inherited Create(AOWner); + MIDIFileHandle:=AllocateHWnd(WndProc); + chunkData := nil; + chunkType := illegal; + Tracks := TList.Create; + TimerProc:=@TimerCallBackProc; + FPriority:=GetPriorityClass(MIDIFileHandle); +end; + +destructor TMidifile.Destroy; +var + i: integer; +begin + if not (chunkData = nil) then FreeMem(chunkData); + for i := 0 to Tracks.Count - 1 do + TMidiTrack(Tracks.Items[i]).Free; + Tracks.Free; + SetPriorityClass(MIDIFileHandle,FPriority); + + if MIDITimerID<>0 then KillMIDITimer; + + DeallocateHWnd(MIDIFileHandle); + + inherited Destroy; +end; + +function TMidiFile.GetTrack(index: integer): TMidiTrack; +begin + result := Tracks.Items[index]; +end; + +procedure TMidifile.SetFilename(val: IPath); +begin + FFilename := val; +// ReadFile; +end; + +procedure TMidifile.SetOnMidiEvent(handler: TOnMidiEvent); +var + i: integer; +begin +// if not (FOnMidiEvent = handler) then +// begin + FOnMidiEvent := handler; + for i := 0 to tracks.count - 1 do + TMidiTrack(tracks.items[i]).OnMidiEvent := handler; +// end; +end; + +{$WARNINGS OFF} +procedure TMidifile.MidiTimer(Sender: TObject); +begin + if playing then + begin + PlayToTime(GetTickCount - PlayStartTime); + if assigned(FOnUpdateEvent) then FOnUpdateEvent(self); + end; +end; +{$WARNINGS ON} + +procedure TMidifile.StartPlaying; +var + i: integer; +begin + for i := 0 to tracks.count - 1 do + TMidiTrack(tracks[i]).Rewind(0); + playStartTime := getTickCount; + playing := true; + + SetPriorityClass(MIDIFileHandle,REALTIME_PRIORITY_CLASS); + + SetMIDITimer; + currentPos := 0.0; + currentTime := 0; +end; + +{$WARNINGS OFF} +procedure TMidifile.ContinuePlaying; +begin + PlayStartTime := GetTickCount - currentTime; + playing := true; + + SetPriorityClass(MIDIFileHandle,REALTIME_PRIORITY_CLASS); + + SetMIDITimer; +end; +{$WARNINGS ON} + +procedure TMidifile.StopPlaying; +begin + playing := false; + KillMIDITimer; + SetPriorityClass(MIDIFileHandle,FPriority); +end; + +function TMidiFile.GetCurrentTime: integer; +begin + Result := currentTime; +end; + +procedure TMidifile.PlayToTime(time: integer); +var + i: integer; + track: TMidiTrack; + pos: integer; + deltaTime: integer; +begin + // calculate the pos in the file. + // pos is actually tick + // Current FusPerTick is uses to determine the actual pos + + deltaTime := time - currentTime; + currentPos := currentPos + (deltaTime * 1000) / FusPerTick; + pos := round(currentPos); + + for i := 0 to tracks.count - 1 do + begin + TMidiTrack(tracks.items[i]).PlayUntil(pos); + end; + currentTime := time; +end; + +procedure TMidifile.GoToTime(time: integer); +var + i: integer; + track: TMidiTrack; + pos: integer; +begin + // this function should be changed because FusPerTick might not be constant + pos := round((time * 1000) / FusPerTick); + for i := 0 to tracks.count - 1 do + begin + TMidiTrack(tracks.items[i]).Rewind(0); + TMidiTrack(tracks.items[i]).GoUntil(pos); + end; +end; + +procedure TMidifile.SetBpm(val: integer); +var + us_per_quarter: integer; +begin + if not (val = FBpm) then + begin + us_per_quarter := 60000000 div val; + + FBpm := 60000000 div us_per_quarter; + FusPerTick := us_per_quarter / deltaTicks; + end; +end; + +procedure TMidifile.ReadChunkHeader; +var + theByte: array[0..7] of byte; +begin + midiFile.Read(theByte[0], 8); + if (theByte[0] = $4D) and (theByte[1] = $54) then + begin + if (theByte[2] = $68) and (theByte[3] = $64) then + chunkType := header + else if (theByte[2] = $72) and (theByte[3] = $6B) then + chunkType := track + else + chunkType := illegal; + end + else + begin + chunkType := illegal; + end; + chunkLength := theByte[7] + theByte[6] * $100 + theByte[5] * $10000 + theByte[4] * $1000000; +end; + +procedure TMidifile.ReadChunkContent; +begin + if not (chunkData = nil) then + FreeMem(chunkData); + GetMem(chunkData, chunkLength + 10); + midiFile.Read(chunkData^, chunkLength); + chunkIndex := chunkData; + chunkEnd := PByte(integer(chunkIndex) + integer(chunkLength) - 1); +end; + +procedure TMidifile.ReadChunk; +begin + ReadChunkHeader; + ReadChunkContent; + case chunkType of + header: + ProcessHeaderChunk; + track: + ProcessTrackCHunk; + end; +end; + +procedure TMidifile.ProcessHeaderChunk; +begin + chunkIndex := chunkData; + inc(chunkIndex); + if chunkType = header then + begin + case chunkIndex^ of + 0: FfileFormat := single; + 1: FfileFormat := multi_synch; + 2: FfileFormat := multi_asynch; + end; + inc(chunkIndex); + numberTracks := chunkIndex^ * $100; + inc(chunkIndex); + numberTracks := numberTracks + chunkIndex^; + inc(chunkIndex); + deltaTicks := chunkIndex^ * $100; + inc(chunkIndex); + deltaTicks := deltaTicks + chunkIndex^; + end; +end; + +procedure TMidifile.ProcessTrackChunk; +var + dTime: integer; + event: integer; + len: integer; + str: string; + midiEvent: PMidiEvent; + i: integer; + us_per_quarter: integer; +begin + chunkIndex := chunkData; +// inc(chunkIndex); + event := 0; + if chunkType = track then + begin + currentTrack := TMidiTrack.Create; + currentTrack.OnMidiEvent := FOnMidiEvent; + Tracks.add(currentTrack); + while integer(chunkIndex) < integer(chunkEnd) do + begin + // each event starts with var length delta time + dTime := ReadVarLength; + if chunkIndex^ >= $80 then + begin + event := chunkIndex^; + inc(chunkIndex); + end; + // else it is a running status event (just the same event as before) + + if event = $FF then + begin +{ case chunkIndex^ of + $00: // sequence number, not implemented jet + begin + inc(chunkIndex); // $02 + inc(chunkIndex); + end; + $01 .. $0f: // text events FF ty len text + begin + New(midiEvent); + midiEvent.event := $FF; + midiEvent.data1 := chunkIndex^; // type is stored in data1 + midiEvent.dticks := dtime; + + inc(chunkIndex); + len := ReadVarLength; + midiEvent.str := ReadString(len); + + currentTrack.putEvent(midiEvent); + end; + $20: // Midi channel prefix FF 20 01 cc + begin + inc(chunkIndex); // $01 + inc(chunkIndex); // channel + inc(chunkIndex); + end; + $2F: // End of track FF 2F 00 + begin + inc(chunkIndex); // $00 + inc(chunkIndex); + end; + $51: // Set Tempo FF 51 03 tttttt + begin + inc(chunkIndex); // $03 + inc(chunkIndex); // tt + inc(chunkIndex); // tt + inc(chunkIndex); // tt + inc(chunkIndex); + end; + $54: // SMPTE offset FF 54 05 hr mn se fr ff + begin + inc(chunkIndex); // $05 + inc(chunkIndex); // hr + inc(chunkIndex); // mn + inc(chunkIndex); // se + inc(chunkIndex); // fr + inc(chunkIndex); // ff + inc(chunkIndex); + end; + $58: // Time signature FF 58 04 nn dd cc bb + begin + inc(chunkIndex); // $04 + inc(chunkIndex); // nn + inc(chunkIndex); // dd + inc(chunkIndex); // cc + inc(chunkIndex); // bb + inc(chunkIndex); + end; + $59: // Key signature FF 59 02 df mi + begin + inc(chunkIndex); // $02 + inc(chunkIndex); // df + inc(chunkIndex); // mi + inc(chunkIndex); + end; + $7F: // Sequence specific Meta-event + begin + inc(chunkIndex); + len := ReadVarLength; + str := ReadString(len); + end; + else // unknown meta event + } + begin + New(midiEvent); + midiEvent.event := $FF; + midiEvent.data1 := chunkIndex^; // type is stored in data1 + midiEvent.dticks := dtime; + + inc(chunkIndex); + len := ReadVarLength; + midiEvent.str := ReadString(len); + currentTrack.putEvent(midiEvent); + + case midiEvent.data1 of + $51: + begin + us_per_quarter := + (integer(byte(midiEvent.str[1])) shl 16 + + integer(byte(midiEvent.str[2])) shl 8 + + integer(byte(midiEvent.str[3]))); + FBpm := 60000000 div us_per_quarter; + FusPerTick := us_per_quarter / deltaTicks; + end; + end; + end; +// end; + end + else + begin + // these are all midi events + New(midiEvent); + midiEvent.event := event; + midiEvent.dticks := dtime; +// inc(chunkIndex); + case event of + $80..$8F, // note off + $90..$9F, // note on + $A0..$AF, // key aftertouch + $B0..$BF, // control change + $E0..$EF: // pitch wheel change + begin + midiEvent.data1 := chunkIndex^; inc(chunkIndex); + midiEvent.data2 := chunkIndex^; inc(chunkIndex); + end; + $C0..$CF, // program change + $D0..$DF: // channel aftertouch + begin + midiEvent.data1 := chunkIndex^; inc(chunkIndex); + end; + else + // error + end; + currentTrack.putEvent(midiEvent); + end; + end; + end; +end; + + +function TMidifile.ReadVarLength: integer; +var + i: integer; + b: byte; +begin + b := 128; + i := 0; + while b > 127 do + begin + i := i shl 7; + b := chunkIndex^; + i := i + b and $7F; + inc(chunkIndex); + end; + result := i; +end; + +function TMidifile.ReadString(l: integer): string; +var + s: PChar; + i: integer; +begin + GetMem(s, l + 1); ; + s[l] := chr(0); + for i := 0 to l - 1 do + begin + s[i] := Chr(chunkIndex^); + inc(chunkIndex); + end; + result := string(s); +end; + +procedure TMidifile.ReadFile; +var + i: integer; +begin + for i := 0 to Tracks.Count - 1 do + TMidiTrack(Tracks.Items[i]).Free; + Tracks.Clear; + chunkType := illegal; + + midiFile := TBinaryFileStream.Create(FFilename, fmOpenRead); + while (midiFile.Position < midiFile.Size) do + ReadChunk; + FreeAndNil(midiFile); + numberTracks := Tracks.Count; +end; + +function KeyToStr(key: integer): string; +var + n: integer; + str: string; +begin + n := key mod 12; + case n of + 0: str := 'C'; + 1: str := 'C#'; + 2: str := 'D'; + 3: str := 'D#'; + 4: str := 'E'; + 5: str := 'F'; + 6: str := 'F#'; + 7: str := 'G'; + 8: str := 'G#'; + 9: str := 'A'; + 10: str := 'A#'; + 11: str := 'B'; + end; + Result := str + IntToStr(key div 12); +end; + +function IntToLenStr(val: integer; len: integer): string; +var + str: string; +begin + str := IntToStr(val); + while Length(str) < len do + str := '0' + str; + Result := str; +end; + +function MyTimeToStr(val: integer): string; + var + hour: integer; + min: integer; + sec: integer; + msec: integer; +begin + msec := val mod 1000; + sec := val div 1000; + min := sec div 60; + sec := sec mod 60; + hour := min div 60; + min := min mod 60; + Result := IntToStr(hour) + ':' + IntToLenStr(min, 2) + ':' + IntToLenStr(sec, 2) + '.' + IntToLenStr(msec, 3); +end; + +function TMidiFIle.GetFusPerTick : Double; +begin + Result := FusPerTick; +end; + +function TMidiFIle.GetTrackLength:integer; +var i,length : integer; + time : extended; +begin + length := 0; + for i := 0 to Tracks.Count - 1 do + if TMidiTrack(Tracks.Items[i]).getTrackLength > length then + length := TMidiTrack(Tracks.Items[i]).getTrackLength; + time := length * FusPerTick; + time := time / 1000.0; + result := round(time); +end; + +function TMidiFIle.Ready: boolean; +var i : integer; +begin + result := true; + for i := 0 to Tracks.Count - 1 do + if not TMidiTrack(Tracks.Items[i]).isready then + result := false; +end; + +procedure TMidiFile.OnTrackReady; +begin + if ready then + if assigned(FOnUpdateEvent) then FOnUpdateEvent(self); +end; + +procedure TMidiFile.WndProc(var Msg : TMessage); +begin + with MSG do + begin + case Msg of + WM_MULTIMEDIA_TIMER: + begin + //try + MidiTimer(self); + //except + // Note: HandleException() is called by default if exception is not handled + // Application.HandleException(Self); + //end; + end; + else + begin + Result := DefWindowProc(MIDIFileHandle, Msg, wParam, lParam); + end; + end; + end; +end; + +procedure Register; +begin + RegisterComponents('Synth', [TMidiFile]); +end; + +end. + diff --git a/VideoPreview/src/lib/midi/MidiScope.pas b/VideoPreview/src/lib/midi/MidiScope.pas new file mode 100644 index 00000000..afc20b0f --- /dev/null +++ b/VideoPreview/src/lib/midi/MidiScope.pas @@ -0,0 +1,198 @@ +{ + Shows a large black area where midi note/controller events are shown + just to monitor midi activity (for the MidiPlayer) + + version 1.0 first release + + for comments/bugs + F.Bouwmans + fbouwmans@spiditel.nl + + if you think this component is nice and you use it, sent me a short email. + I've seen that other of my components have been downloaded a lot, but I've + got no clue wether they are actually used. + Don't worry because you are free to use these components +} + +unit MidiScope; + +interface + +{$IFDEF FPC} + {$MODE Delphi} + {$H+} // use long strings +{$ENDIF} + +uses + Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs; + +type + TMidiScope = class(TGraphicControl) + private + { Private declarations } + protected + { Protected declarations } + notes : array[0..15,0..127] of integer; + controllers : array[0..15,0..17] of integer; + aftertouch : array[0..15,0..127] of integer; + + selectedChannel : integer; + + procedure PaintSlide(ch,pos,val: integer); + + procedure NoteOn(channel, note, speed : integer); + procedure Controller(channel,number,value : integer); + procedure AfterTch(channel, note, value : integer); + + public + { Public declarations } + constructor Create(AOwner: TComponent); override; + procedure MidiEvent(event,data1,data2 : integer); + procedure Paint; override; + published + { Published declarations } + end; + + +procedure Register; + +const + BarHeight = 16; + BarHeightInc = BarHeight+2; + BarWidth = 3; + BarWidthInc = BarWidth+1; + HeightDiv = 128 div BarHeight; + +implementation + +uses Midicons; + +procedure Register; +begin + RegisterComponents('Synth', [TMidiScope]); +end; + +constructor TMidiScope.Create(AOwner: TComponent); +var + i,j : integer; +begin + inherited Create(AOwner); + Height := BarHeightinc * 16 + 4; + Width := 147*BarWidthInc + 4 + 20; // for channel number + for i := 0 to 15 do + begin + for j := 0 to 127 do + begin + notes[i,j] := 0; + aftertouch[i,j] := 0; + end; + end; + for i := 0 to 17 do + begin + for j := 0 to 15 do + controllers[i,j] := 0; + end; +end; + +procedure TMidiScope.PaintSlide(ch,pos,val: integer); +var x,y:integer; +begin + Canvas.Brush.Color := clBlack; + Canvas.Pen.color := clBlack; + x := pos * BarWidthInc + 2; + y := 2 + ch * BarHeightInc; + Canvas.Rectangle(x, y, x+BarWidthInc, y+BarHeightInc); + Canvas.Brush.Color := clGreen; + Canvas.Pen.Color := clGreen; + Canvas.Rectangle(x, y + (BarHeight - (val div HeightDiv )), x + BarWidth, y + BarHeight) +end; + +procedure TMidiScope.Paint; +var i,j : integer; +x : integer; +begin + Canvas.Brush.color := clBlack; + Canvas.Rectangle(0,0,Width,Height); + Canvas.Pen.Color := clGreen; + x := 128*BarWidthInc+2; + Canvas.MoveTo(x,0); + Canvas.LineTo(x,Height); + x := 148*BarWIdthInc+2; + canvas.Font.Color := clGreen; + for i := 0 to 15 do + Canvas.TextOut(x,((i+1)*BarHeightInc) - Canvas.font.size-3,IntToStr(i+1)); + canvas.Pen.color := clBlack; + begin + for j := 0 to 127 do + begin + PaintSlide(i,j,notes[i,j]); + end; + for j := 0 to 17 do + begin + PaintSlide(i,j+129,controllers[i,j]); + end; + end; +end; +procedure TMidiScope.NoteOn(channel, note, speed : integer); +begin + notes[channel,note] := speed; + PaintSlide(channel,note,notes[channel,note]); +end; +procedure TMidiScope.AfterTch(channel, note, value : integer); +begin + aftertouch[channel,note] := value; +end; + +procedure TMidiScope.Controller(channel,number,value : integer); +var i : integer; +begin + if number < 18 then + begin + controllers[channel,number] := value; + PaintSlide(channel,number+129,value); + end + else if number >= $7B then + begin + // all notes of for channel + for i := 0 to 127 do + begin + if notes[channel,i] > 0 then + begin + notes[channel,i] := 0; + PaintSlide(channel,i,0); + end; + end; + end; +end; + +procedure TMidiScope.MidiEvent(event,data1,data2 : integer); +begin + case (event AND $F0) of + MIDI_NOTEON : + begin + NoteOn((event AND $F),data1,data2); + end; + MIDI_NOTEOFF: + begin + NoteOn((event AND $F),data1,0); + end; + MIDI_CONTROLCHANGE : + begin + Controller((event AND $F),data1,data2); + end; + MIDI_CHANAFTERTOUCH: + begin + Controller((Event AND $F),16,Data1); + end; + MIDI_PITCHBEND: + begin + begin + Controller((Event AND $F),17,data2); + end; + end; + MIDI_KEYAFTERTOUCH: + begin + end; + end; +end; +end. diff --git a/VideoPreview/src/lib/midi/Midicons.pas b/VideoPreview/src/lib/midi/Midicons.pas new file mode 100644 index 00000000..72259beb --- /dev/null +++ b/VideoPreview/src/lib/midi/Midicons.pas @@ -0,0 +1,47 @@ +{ $Header: /MidiComp/MIDICONS.PAS 2 10/06/97 7:33 Davec $ } + +{ Written by David Churcher <dchurcher@cix.compulink.co.uk>, + released to the public domain. } + + +{ MIDI Constants } +unit Midicons; + +interface + +{$IFDEF FPC} + {$MODE Delphi} + {$H+} // use long strings +{$ENDIF} + +uses Messages; + +const + MIDI_ALLNOTESOFF = $7B; + MIDI_NOTEON = $90; + MIDI_NOTEOFF = $80; + MIDI_KEYAFTERTOUCH = $a0; + MIDI_CONTROLCHANGE = $b0; + MIDI_PROGRAMCHANGE = $c0; + MIDI_CHANAFTERTOUCH = $d0; + MIDI_PITCHBEND = $e0; + MIDI_SYSTEMMESSAGE = $f0; + MIDI_BEGINSYSEX = $f0; + MIDI_MTCQUARTERFRAME = $f1; + MIDI_SONGPOSPTR = $f2; + MIDI_SONGSELECT = $f3; + MIDI_ENDSYSEX = $F7; + MIDI_TIMINGCLOCK = $F8; + MIDI_START = $FA; + MIDI_CONTINUE = $FB; + MIDI_STOP = $FC; + MIDI_ACTIVESENSING = $FE; + MIDI_SYSTEMRESET = $FF; + + MIM_OVERFLOW = WM_USER; { Input buffer overflow } + MOM_PLAYBACK_DONE = WM_USER+1; { Timed playback complete } + + +implementation + +end. diff --git a/VideoPreview/src/lib/midi/Midiin.pas b/VideoPreview/src/lib/midi/Midiin.pas new file mode 100644 index 00000000..a055669a --- /dev/null +++ b/VideoPreview/src/lib/midi/Midiin.pas @@ -0,0 +1,720 @@ +{ $Header: /MidiComp/Midiin.pas 2 10/06/97 7:33 Davec $ } + +{ Written by David Churcher <dchurcher@cix.compulink.co.uk>, + released to the public domain. } + +unit MidiIn; + +{ + Properties: + DeviceID: Windows numeric device ID for the MIDI input device. + Between 0 and NumDevs-1. + Read-only while device is open, exception when changed while open + + MIDIHandle: The input handle to the MIDI device. + 0 when device is not open + Read-only, runtime-only + + MessageCount: Number of input messages waiting in input buffer + + Capacity: Number of messages input buffer can hold + Defaults to 1024 + Limited to (64K/event size) + Read-only when device is open (exception when changed while open) + + SysexBufferSize: Size in bytes of each sysex buffer + Defaults to 10K + Minimum 0K (no buffers), Maximum 64K-1 + + SysexBufferCount: Number of sysex buffers + Defaults to 16 + Minimum 0 (no buffers), Maximum (avail mem/SysexBufferSize) + Check where these buffers are allocated? + + SysexOnly: True to ignore all non-sysex input events. May be changed while + device is open. Handy for patch editors where you have lots of short MIDI + events on the wire which you are always going to ignore anyway. + + DriverVersion: Version number of MIDI device driver. High-order byte is + major version, low-order byte is minor version. + + ProductName: Name of product (e.g. 'MPU 401 In') + + MID and PID: Manufacturer ID and Product ID, see + "Manufacturer and Product IDs" in MMSYSTEM.HLP for list of possible values. + + Methods: + GetMidiEvent: Read Midi event at the head of the FIFO input buffer. + Returns a TMyMidiEvent object containing MIDI message data, timestamp, + and sysex data if applicable. + This method automatically removes the event from the input buffer. + It makes a copy of the received sysex buffer and puts the buffer back + on the input device. + The TMyMidiEvent object must be freed by calling MyMidiEvent.Free. + + Open: Opens device. Note no input will appear until you call the Start + method. + + Close: Closes device. Any pending system exclusive output will be cancelled. + + Start: Starts receiving MIDI input. + + Stop: Stops receiving MIDI input. + + Events: + OnMidiInput: Called when MIDI input data arrives. Use the GetMidiEvent to + get the MIDI input data. + + OnOverflow: Called if the MIDI input buffer overflows. The caller must + clear the buffer before any more MIDI input can be received. + + Notes: + Buffering: Uses a circular buffer, separate pointers for next location + to fill and next location to empty because a MIDI input interrupt may + be adding data to the buffer while the buffer is being read. Buffer + pointers wrap around from end to start of buffer automatically. If + buffer overflows then the OnBufferOverflow event is triggered and no + further input will be received until the buffer is emptied by calls + to GetMidiEvent. + + Sysex buffers: There are (SysexBufferCount) buffers on the input device. + When sysex events arrive these buffers are removed from the input device and + added to the circular buffer by the interrupt handler in the DLL. When the sysex events + are removed from the circular buffer by the GetMidiEvent method the buffers are + put back on the input. If all the buffers are used up there will be no + more sysex input until at least one sysex event is removed from the input buffer. + In other words if you're expecting lots of sysex input you need to set the + SysexBufferCount property high enough so that you won't run out of + input buffers before you get a chance to read them with GetMidiEvent. + + If the synth sends a block of sysex that's longer than SysexBufferSize it + will be received as separate events. + TODO: Component derived from this one that handles >64K sysex blocks cleanly + and can stream them to disk. + + Midi Time Code (MTC) and Active Sensing: The DLL is currently hardcoded + to filter these short events out, so that we don't spend all our time + processing them. + TODO: implement a filter property to select the events that will be filtered + out. +} + +interface + +{$IFDEF FPC} + {$MODE Delphi} + {$H+} // use long strings +{$ENDIF} + +uses + Classes, + SysUtils, + Messages, + Windows, + MMSystem, + {$IFDEF FPC} + WinAllocation, + {$ENDIF} + MidiDefs, + MidiType, + MidiCons, + Circbuf, + Delphmcb; + +type + MidiInputState = (misOpen, misClosed, misCreating, misDestroying); + EMidiInputError = class(Exception); + + {-------------------------------------------------------------------} + TMidiInput = class(TComponent) + private + Handle: THandle; { Window handle used for callback notification } + FDeviceID: Word; { MIDI device ID } + FMIDIHandle: HMIDIIn; { Handle to input device } + FState: MidiInputState; { Current device state } + + FError: Word; + FSysexOnly: Boolean; + + { Stuff from MIDIINCAPS } + FDriverVersion: MMVERSION; + FProductName: string; + FMID: Word; { Manufacturer ID } + FPID: Word; { Product ID } + + { Queue } + FCapacity: Word; { Buffer capacity } + PBuffer: PCircularBuffer; { Low-level MIDI input buffer created by Open method } + FNumdevs: Word; { Number of input devices on system } + + { Events } + FOnMIDIInput: TNotifyEvent; { MIDI Input arrived } + FOnOverflow: TNotifyEvent; { Input buffer overflow } + { TODO: Some sort of error handling event for MIM_ERROR } + + { Sysex } + FSysexBufferSize: Word; + FSysexBufferCount: Word; + MidiHdrs: Tlist; + + PCtlInfo: PMidiCtlInfo; { Pointer to control info for DLL } + + protected + procedure Prepareheaders; + procedure UnprepareHeaders; + procedure AddBuffers; + procedure SetDeviceID(DeviceID: Word); + procedure SetProductName(NewProductName: string); + function GetEventCount: Word; + procedure SetSysexBufferSize(BufferSize: Word); + procedure SetSysexBufferCount(BufferCount: Word); + procedure SetSysexOnly(bSysexOnly: Boolean); + function MidiInErrorString(WError: Word): string; + + public + constructor Create(AOwner: TComponent); override; + destructor Destroy; override; + + property MIDIHandle: HMIDIIn read FMIDIHandle; + + property DriverVersion: MMVERSION read FDriverVersion; + property MID: Word read FMID; { Manufacturer ID } + property PID: Word read FPID; { Product ID } + + property Numdevs: Word read FNumdevs; + + property MessageCount: Word read GetEventCount; + { TODO: property to select which incoming messages get filtered out } + + procedure Open; + procedure Close; + procedure Start; + procedure Stop; + { Get first message in input queue } + function GetMidiEvent: TMyMidiEvent; + procedure MidiInput(var Message: TMessage); + + { Some functions to decode and classify incoming messages would be good } + + published + + { TODO: Property editor with dropdown list of product names } + property ProductName: string read FProductName write SetProductName; + + property DeviceID: Word read FDeviceID write SetDeviceID default 0; + property Capacity: Word read FCapacity write FCapacity default 1024; + property Error: Word read FError; + property SysexBufferSize: Word + read FSysexBufferSize + write SetSysexBufferSize + default 10000; + property SysexBufferCount: Word + read FSysexBufferCount + write SetSysexBufferCount + default 16; + property SysexOnly: Boolean + read FSysexOnly + write SetSysexOnly + default False; + + { Events } + property OnMidiInput: TNotifyEvent read FOnMidiInput write FOnMidiInput; + property OnOverflow: TNotifyEvent read FOnOverflow write FOnOverflow; + + end; + +procedure Register; + +{====================================================================} +implementation + +uses Controls, + Graphics; + +(* Not used in Delphi 3 +{ This is the callback procedure in the external DLL. + It's used when midiInOpen is called by the Open method. + There are special requirements and restrictions for this callback + procedure (see midiInOpen in MMSYSTEM.HLP) so it's impractical to + make it an object method } +{$IFDEF MSWINDOWS} +function midiHandler( + hMidiIn: HMidiIn; + wMsg: UINT; + dwInstance: DWORD; + dwParam1: DWORD; + dwParam2: DWORD): Boolean; stdcall; external 'DELMID32.DLL'; +{$ENDIF} +*) +{-------------------------------------------------------------------} + +constructor TMidiInput.Create(AOwner: TComponent); +begin + inherited Create(AOwner); + FState := misCreating; + + FSysexOnly := False; + FNumDevs := midiInGetNumDevs; + MidiHdrs := nil; + + { Set defaults } + if (FNumDevs > 0) then + SetDeviceID(0); + FCapacity := 1024; + FSysexBufferSize := 4096; + FSysexBufferCount := 16; + + { Create the window for callback notification } + if not (csDesigning in ComponentState) then + begin + Handle := AllocateHwnd(MidiInput); + end; + + FState := misClosed; + +end; + +{-------------------------------------------------------------------} +{ Close the device if it's open } + +destructor TMidiInput.Destroy; +begin + if (FMidiHandle <> 0) then + begin + Close; + FMidiHandle := 0; + end; + + if (PCtlInfo <> nil) then + GlobalSharedLockedFree(PCtlinfo^.hMem, PCtlInfo); + + DeallocateHwnd(Handle); + inherited Destroy; +end; + +{-------------------------------------------------------------------} +{ Convert the numeric return code from an MMSYSTEM function to a string + using midiInGetErrorText. TODO: These errors aren't very helpful + (e.g. "an invalid parameter was passed to a system function") so + sort out some proper error strings. } + +function TMidiInput.MidiInErrorString(WError: Word): string; +var + errorDesc: PChar; +begin + errorDesc := nil; + try + errorDesc := StrAlloc(MAXERRORLENGTH); + if midiInGetErrorText(WError, errorDesc, MAXERRORLENGTH) = 0 then + result := StrPas(errorDesc) + else + result := 'Specified error number is out of range'; + finally + if errorDesc <> nil then StrDispose(errorDesc); + end; +end; + +{-------------------------------------------------------------------} +{ Set the sysex buffer size, fail if device is already open } + +procedure TMidiInput.SetSysexBufferSize(BufferSize: Word); +begin + if FState = misOpen then + raise EMidiInputError.Create('Change to SysexBufferSize while device was open') + else + { TODO: Validate the sysex buffer size. Is this necessary for WIN32? } + FSysexBufferSize := BufferSize; +end; + +{-------------------------------------------------------------------} +{ Set the sysex buffer count, fail if device is already open } + +procedure TMidiInput.SetSysexBuffercount(Buffercount: Word); +begin + if FState = misOpen then + raise EMidiInputError.Create('Change to SysexBuffercount while device was open') + else + { TODO: Validate the sysex buffer count } + FSysexBuffercount := Buffercount; +end; + +{-------------------------------------------------------------------} +{ Set the Sysex Only flag to eliminate unwanted short MIDI input messages } + +procedure TMidiInput.SetSysexOnly(bSysexOnly: Boolean); +begin + FSysexOnly := bSysexOnly; + { Update the interrupt handler's copy of this property } + if PCtlInfo <> nil then + PCtlInfo^.SysexOnly := bSysexOnly; +end; + +{-------------------------------------------------------------------} +{ Set the Device ID to select a new MIDI input device + Note: If no MIDI devices are installed, throws an 'Invalid Device ID' exception } + +procedure TMidiInput.SetDeviceID(DeviceID: Word); +var + MidiInCaps: TMidiInCaps; +begin + if FState = misOpen then + raise EMidiInputError.Create('Change to DeviceID while device was open') + else + if (DeviceID >= midiInGetNumDevs) then + raise EMidiInputError.Create('Invalid device ID') + else + begin + FDeviceID := DeviceID; + + { Set the name and other MIDIINCAPS properties to match the ID } + FError := + midiInGetDevCaps(DeviceID, @MidiInCaps, sizeof(TMidiInCaps)); + if Ferror <> MMSYSERR_NOERROR then + raise EMidiInputError.Create(MidiInErrorString(FError)); + + FProductName := StrPas(MidiInCaps.szPname); + FDriverVersion := MidiInCaps.vDriverVersion; + FMID := MidiInCaps.wMID; + FPID := MidiInCaps.wPID; + + end; +end; + +{-------------------------------------------------------------------} +{ Set the product name and put the matching input device number in FDeviceID. + This is handy if you want to save a configured input/output device + by device name instead of device number, because device numbers may + change if users add or remove MIDI devices. + Exception if input device with matching name not found, + or if input device is open } + +procedure TMidiInput.SetProductName(NewProductName: string); +var + MidiInCaps: TMidiInCaps; + testDeviceID: Word; + testProductName: string; +begin + if FState = misOpen then + raise EMidiInputError.Create('Change to ProductName while device was open') + else + { Don't set the name if the component is reading properties because + the saved Productname will be from the machine the application was compiled + on, which may not be the same for the corresponding DeviceID on the user's + machine. The FProductname property will still be set by SetDeviceID } + if not (csLoading in ComponentState) then + begin + begin + for testDeviceID := 0 to (midiInGetNumDevs - 1) do + begin + FError := + midiInGetDevCaps(testDeviceID, @MidiInCaps, sizeof(TMidiInCaps)); + if Ferror <> MMSYSERR_NOERROR then + raise EMidiInputError.Create(MidiInErrorString(FError)); + testProductName := StrPas(MidiInCaps.szPname); + if testProductName = NewProductName then + begin + FProductName := NewProductName; + Break; + end; + end; + if FProductName <> NewProductName then + raise EMidiInputError.Create('MIDI Input Device ' + + NewProductName + ' not installed ') + else + SetDeviceID(testDeviceID); + end; + end; +end; + + +{-------------------------------------------------------------------} +{ Get the sysex buffers ready } + +procedure TMidiInput.PrepareHeaders; +var + ctr: Word; + MyMidiHdr: TMyMidiHdr; +begin + if (FSysexBufferCount > 0) and (FSysexBufferSize > 0) + and (FMidiHandle <> 0) then + begin + Midihdrs := TList.Create; + for ctr := 1 to FSysexBufferCount do + begin + { Initialize the header and allocate buffer memory } + MyMidiHdr := TMyMidiHdr.Create(FSysexBufferSize); + + { Store the address of the MyMidiHdr object in the contained MIDIHDR + structure so we can get back to the object when a pointer to the + MIDIHDR is received. + E.g. see TMidiOutput.Output method } + MyMidiHdr.hdrPointer^.dwUser := DWORD(MyMidiHdr); + + { Get MMSYSTEM's blessing for this header } + FError := midiInPrepareHeader(FMidiHandle, MyMidiHdr.hdrPointer, + sizeof(TMIDIHDR)); + if Ferror <> MMSYSERR_NOERROR then + raise EMidiInputError.Create(MidiInErrorString(FError)); + + { Save it in our list } + MidiHdrs.Add(MyMidiHdr); + end; + end; + +end; + +{-------------------------------------------------------------------} +{ Clean up from PrepareHeaders } + +procedure TMidiInput.UnprepareHeaders; +var + ctr: Word; +begin + if (MidiHdrs <> nil) then { will be Nil if 0 sysex buffers } + begin + for ctr := 0 to MidiHdrs.Count - 1 do + begin + FError := midiInUnprepareHeader(FMidiHandle, + TMyMidiHdr(MidiHdrs.Items[ctr]).hdrPointer, + sizeof(TMIDIHDR)); + if Ferror <> MMSYSERR_NOERROR then + raise EMidiInputError.Create(MidiInErrorString(FError)); + TMyMidiHdr(MidiHdrs.Items[ctr]).Free; + end; + MidiHdrs.Free; + MidiHdrs := nil; + end; +end; + +{-------------------------------------------------------------------} +{ Add sysex buffers, if required, to input device } + +procedure TMidiInput.AddBuffers; +var + ctr: Word; +begin + if MidiHdrs <> nil then { will be Nil if 0 sysex buffers } + begin + if MidiHdrs.Count > 0 then + begin + for ctr := 0 to MidiHdrs.Count - 1 do + begin + FError := midiInAddBuffer(FMidiHandle, + TMyMidiHdr(MidiHdrs.Items[ctr]).hdrPointer, + sizeof(TMIDIHDR)); + if FError <> MMSYSERR_NOERROR then + raise EMidiInputError.Create(MidiInErrorString(FError)); + end; + end; + end; +end; + +{-------------------------------------------------------------------} + +procedure TMidiInput.Open; +var + hMem: THandle; +begin + try + { Create the buffer for the MIDI input messages } + if (PBuffer = nil) then + PBuffer := CircBufAlloc(FCapacity); + + { Create the control info for the DLL } + if (PCtlInfo = nil) then + begin + PCtlInfo := GlobalSharedLockedAlloc(Sizeof(TMidiCtlInfo), hMem); + PctlInfo^.hMem := hMem; + end; + PctlInfo^.pBuffer := PBuffer; + Pctlinfo^.hWindow := Handle; { Control's window handle } + PCtlInfo^.SysexOnly := FSysexOnly; + FError := midiInOpen(@FMidiHandle, FDeviceId, + DWORD(@midiHandler), + DWORD(PCtlInfo), + CALLBACK_FUNCTION); + + if (FError <> MMSYSERR_NOERROR) then + { TODO: use CreateFmtHelp to add MIDI device name/ID to message } + raise EMidiInputError.Create(MidiInErrorString(FError)); + + { Get sysex buffers ready } + PrepareHeaders; + + { Add them to the input } + AddBuffers; + + FState := misOpen; + + except + if PBuffer <> nil then + begin + CircBufFree(PBuffer); + PBuffer := nil; + end; + + if PCtlInfo <> nil then + begin + GlobalSharedLockedFree(PCtlInfo^.hMem, PCtlInfo); + PCtlInfo := nil; + end; + + end; + +end; + +{-------------------------------------------------------------------} + +function TMidiInput.GetMidiEvent: TMyMidiEvent; +var + thisItem: TMidiBufferItem; +begin + if (FState = misOpen) and + CircBufReadEvent(PBuffer, @thisItem) then + begin + Result := TMyMidiEvent.Create; + with thisItem do + begin + Result.Time := Timestamp; + if (Sysex = nil) then + begin + { Short message } + Result.MidiMessage := LoByte(LoWord(Data)); + Result.Data1 := HiByte(LoWord(Data)); + Result.Data2 := LoByte(HiWord(Data)); + Result.Sysex := nil; + Result.SysexLength := 0; + end + else + { Long Sysex message } + begin + Result.MidiMessage := MIDI_BEGINSYSEX; + Result.Data1 := 0; + Result.Data2 := 0; + Result.SysexLength := Sysex^.dwBytesRecorded; + if Sysex^.dwBytesRecorded <> 0 then + begin + { Put a copy of the sysex buffer in the object } + GetMem(Result.Sysex, Sysex^.dwBytesRecorded); + StrMove(Result.Sysex, Sysex^.lpData, Sysex^.dwBytesRecorded); + end; + + { Put the header back on the input buffer } + FError := midiInPrepareHeader(FMidiHandle, Sysex, + sizeof(TMIDIHDR)); + if Ferror = 0 then + FError := midiInAddBuffer(FMidiHandle, + Sysex, sizeof(TMIDIHDR)); + if Ferror <> MMSYSERR_NOERROR then + raise EMidiInputError.Create(MidiInErrorString(FError)); + end; + end; + CircbufRemoveEvent(PBuffer); + end + else + { Device isn't open, return a nil event } + Result := nil; +end; + +{-------------------------------------------------------------------} + +function TMidiInput.GetEventCount: Word; +begin + if FState = misOpen then + Result := PBuffer^.EventCount + else + Result := 0; +end; + +{-------------------------------------------------------------------} + +procedure TMidiInput.Close; +begin + if FState = misOpen then + begin + FState := misClosed; + + { MidiInReset cancels any pending output. + Note that midiInReset causes an MIM_LONGDATA callback for each sysex + buffer on the input, so the callback function and Midi input buffer + should still be viable at this stage. + All the resulting MIM_LONGDATA callbacks will be completed by the time + MidiInReset returns, though. } + FError := MidiInReset(FMidiHandle); + if Ferror <> MMSYSERR_NOERROR then + raise EMidiInputError.Create(MidiInErrorString(FError)); + + { Remove sysex buffers from input device and free them } + UnPrepareHeaders; + + { Close the device (finally!) } + FError := MidiInClose(FMidiHandle); + if Ferror <> MMSYSERR_NOERROR then + raise EMidiInputError.Create(MidiInErrorString(FError)); + + FMidiHandle := 0; + + if (PBuffer <> nil) then + begin + CircBufFree(PBuffer); + PBuffer := nil; + end; + end; +end; + +{-------------------------------------------------------------------} + +procedure TMidiInput.Start; +begin + if FState = misOpen then + begin + FError := MidiInStart(FMidiHandle); + if Ferror <> MMSYSERR_NOERROR then + raise EMidiInputError.Create(MidiInErrorString(FError)); + end; +end; + +{-------------------------------------------------------------------} + +procedure TMidiInput.Stop; +begin + if FState = misOpen then + begin + FError := MidiInStop(FMidiHandle); + if Ferror <> MMSYSERR_NOERROR then + raise EMidiInputError.Create(MidiInErrorString(FError)); + end; +end; + +{-------------------------------------------------------------------} + +procedure TMidiInput.MidiInput(var Message: TMessage); +{ Triggered by incoming message from DLL. + Note DLL has already put the message in the queue } +begin + case Message.Msg of + mim_data: + { Trigger the user's MIDI input event, if they've specified one and + we're not in the process of closing the device. The check for + GetEventCount > 0 prevents unnecessary event calls where the user has + already cleared all the events from the input buffer using a GetMidiEvent + loop in the OnMidiInput event handler } + if Assigned(FOnMIDIInput) and (FState = misOpen) + and (GetEventCount > 0) then + FOnMIDIInput(Self); + + mim_Overflow: { input circular buffer overflow } + if Assigned(FOnOverflow) and (FState = misOpen) then + FOnOverflow(Self); + end; +end; + +{-------------------------------------------------------------------} + +procedure Register; +begin + RegisterComponents('Synth', [TMIDIInput]); +end; + +end. + diff --git a/VideoPreview/src/lib/midi/Midiout.pas b/VideoPreview/src/lib/midi/Midiout.pas new file mode 100644 index 00000000..7ce385eb --- /dev/null +++ b/VideoPreview/src/lib/midi/Midiout.pas @@ -0,0 +1,612 @@ +{ $Header: /MidiComp/MidiOut.pas 2 10/06/97 7:33 Davec $ } + +{ Written by David Churcher <dchurcher@cix.compulink.co.uk>, + released to the public domain. } + +{ Thanks very much to Fred Kohler for the Technology code. } + +unit MidiOut; + +{ + MIDI Output component. + + Properties: + DeviceID: Windows numeric device ID for the MIDI output device. + Between 0 and (midioutGetNumDevs-1), or MIDI_MAPPER (-1). + Special value MIDI_MAPPER specifies output to the Windows MIDI mapper + Read-only while device is open, exception if changed while open + + MIDIHandle: The output handle to the MIDI device. + 0 when device is not open + Read-only, runtime-only + + ProductName: Name of the output device product that corresponds to the + DeviceID property (e.g. 'MPU 401 out'). + You can write to this while the device is closed to select a particular + output device by name (the DeviceID property will change to match). + Exception if this property is changed while the device is open. + + Numdevs: Number of MIDI output devices installed on the system. This + is the value returned by midiOutGetNumDevs. It's included for + completeness. + + Technology: Type of technology used by the MIDI device. You can set this + property to one of the values listed for OutportTech (below) and the component + will find an appropriate MIDI device. For example: + MidiOutput.Technology := opt_FMSynth; + will set MidiInput.DeviceID to the MIDI device ID of the FM synth, if one + is installed. If no such device is available an exception is raised, + see MidiOutput.SetTechnology. + + See the MIDIOUTCAPS entry in MMSYSTEM.HLP for descriptions of the + following properties: + DriverVersion + Voices + Notes + ChannelMask + Support + + Error: The error code for the last MMSYSTEM error. See the MMSYSERR_ + entries in MMSYSTEM.INT for possible values. + + Methods: + Open: Open MIDI device specified by DeviceID property for output + + Close: Close device + + PutMidiEvent(Event:TMyMidiEvent): Output a note or sysex message to the + device. This method takes a TMyMidiEvent object and transmits it. + Notes: + 1. If the object contains a sysex event the OnMidiOutput event will + be triggered when the sysex transmission is complete. + 2. You can queue up multiple blocks of system exclusive data for + transmission by chucking them at this method; they will be + transmitted as quickly as the device can manage. + 3. This method will not free the TMyMidiEvent object, the caller + must do that. Any sysex data in the TMyMidiEvent is copied before + transmission so you can free the TMyMidiEvent immediately after + calling PutMidiEvent, even if output has not yet finished. + + PutShort(MidiMessage: Byte; Data1: Byte; Data2: Byte): Output a short + MIDI message. Handy when you can't be bothered to build a TMyMidiEvent. + If the message you're sending doesn't use Data1 or Data2, set them to 0. + + PutLong(TheSysex: Pointer; msgLength: Word): Output sysex data. + SysexPointer: Pointer to sysex data to send + msgLength: Length of sysex data. + This is handy when you don't have a TMyMidiEvent. + + SetVolume(Left: Word, Right: Word): Set the volume of the + left and right channels on the output device (only on internal devices?). + 0xFFFF is maximum volume. If the device doesn't support separate + left/right volume control, the value of the Left parameter will be used. + Check the Support property to see whether the device supports volume + control. See also other notes on volume control under midiOutSetVolume() + in MMSYSTEM.HLP. + + Events: + OnMidiOutput: Procedure called when output of a system exclusive block + is completed. + + Notes: + I haven't implemented any methods for midiOutCachePatches and + midiOutCacheDrumpatches, mainly 'cause I don't have any way of testing + them. Does anyone really use these? +} + +interface + +{$IFDEF FPC} + {$MODE Delphi} + {$H+} // use long strings +{$ENDIF} + +uses + SysUtils, + Windows, + Messages, + Classes, + MMSystem, + {$IFDEF FPC} + WinAllocation, + {$ENDIF} + Circbuf, + MidiType, + MidiDefs, + Delphmcb; + +{$IFDEF FPC} +type TmidioutCaps = MIDIOUTCAPS; +{$ENDIF} + +type + midioutputState = (mosOpen, mosClosed); + EmidioutputError = class(Exception); + + { These are the equivalent of constants prefixed with mod_ + as defined in MMSystem. See SetTechnology } + OutPortTech = ( + opt_None, { none } + opt_MidiPort, { output port } + opt_Synth, { generic internal synth } + opt_SQSynth, { square wave internal synth } + opt_FMSynth, { FM internal synth } + opt_Mapper); { MIDI mapper } + TechNameMap = array[OutPortTech] of string[18]; + + +const + TechName: TechNameMap = ( + 'None', 'MIDI Port', 'Generic Synth', 'Square Wave Synth', + 'FM Synth', 'MIDI Mapper'); + +{-------------------------------------------------------------------} +type + TMidiOutput = class(TComponent) + protected + Handle: THandle; { Window handle used for callback notification } + FDeviceID: Cardinal; { MIDI device ID } + FMIDIHandle: Hmidiout; { Handle to output device } + FState: midioutputState; { Current device state } + PCtlInfo: PMidiCtlInfo; { Pointer to control info for DLL } + + PBuffer: PCircularBuffer; { Output queue for PutTimedEvent, set by Open } + + FError: Word; { Last MMSYSTEM error } + + { Stuff from midioutCAPS } + FDriverVersion: MMVERSION; { Driver version from midioutGetDevCaps } + FProductName: string; { product name } + FTechnology: OutPortTech; { Type of MIDI output device } + FVoices: Word; { Number of voices (internal synth) } + FNotes: Word; { Number of notes (internal synth) } + FChannelMask: Word; { Bit set for each MIDI channels that the + device responds to (internal synth) } + FSupport: DWORD; { Technology supported (volume control, + patch caching etc. } + FNumdevs: Word; { Number of MIDI output devices on system } + + + FOnMIDIOutput: TNotifyEvent; { Sysex output finished } + + procedure MidiOutput(var Message: TMessage); + procedure SetDeviceID(DeviceID: Cardinal); + procedure SetProductName(NewProductName: string); + procedure SetTechnology(NewTechnology: OutPortTech); + function midioutErrorString(WError: Word): string; + + public + { Properties } + property MIDIHandle: Hmidiout read FMIDIHandle; + property DriverVersion: MMVERSION { Driver version from midioutGetDevCaps } + read FDriverVersion; + property Technology: OutPortTech { Type of MIDI output device } + read FTechnology + write SetTechnology + default opt_Synth; + property Voices: Word { Number of voices (internal synth) } + read FVoices; + property Notes: Word { Number of notes (internal synth) } + read FNotes; + property ChannelMask: Word { Bit set for each MIDI channels that the } + read FChannelMask; { device responds to (internal synth) } + property Support: DWORD { Technology supported (volume control, } + read FSupport; { patch caching etc. } + property Error: Word read FError; + property Numdevs: Word read FNumdevs; + + { Methods } + function Open: Boolean; virtual; + function Close: Boolean; virtual; + procedure PutMidiEvent(theEvent: TMyMidiEvent); virtual; + procedure PutShort(MidiMessage: Byte; Data1: Byte; Data2: Byte); virtual; + procedure PutLong(TheSysex: Pointer; msgLength: Word); virtual; + procedure SetVolume(Left: Word; Right: Word); + constructor Create(AOwner: TComponent); override; + destructor Destroy; override; + + { Some functions to decode and classify incoming messages would be nice } + + published + { TODO: Property editor with dropdown list of product names } + property ProductName: string read FProductName write SetProductName; + + property DeviceID: Cardinal read FDeviceID write SetDeviceID default 0; + { TODO: midiOutGetVolume? Or two properties for Left and Right volume? + Is it worth it?? + midiOutMessage?? Does anyone use this? } + + { Events } + property Onmidioutput: TNotifyEvent + read FOnmidioutput + write FOnmidioutput; + end; + +procedure Register; + +{-------------------------------------------------------------------} +implementation + +(* Not used in Delphi 3 + +{ This is the callback procedure in the external DLL. + It's used when midioutOpen is called by the Open method. + There are special requirements and restrictions for this callback + procedure (see midioutOpen in MMSYSTEM.HLP) so it's impractical to + make it an object method } +{$IFDEF MSWINDOWS} +function midiHandler( + hMidiIn: HMidiIn; + wMsg: UINT; + dwInstance: DWORD; + dwParam1: DWORD; + dwParam2: DWORD): Boolean; stdcall; external 'DELMID32.DLL'; +{$ENDIF} +*) + +{-------------------------------------------------------------------} + +constructor Tmidioutput.Create(AOwner: TComponent); +begin + inherited Create(AOwner); + FState := mosClosed; + FNumdevs := midiOutGetNumDevs; + + { Create the window for callback notification } + if not (csDesigning in ComponentState) then + begin + Handle := AllocateHwnd(MidiOutput); + end; + +end; + +{-------------------------------------------------------------------} + +destructor Tmidioutput.Destroy; +begin + if FState = mosOpen then + Close; + if (PCtlInfo <> nil) then + GlobalSharedLockedFree(PCtlinfo^.hMem, PCtlInfo); + DeallocateHwnd(Handle); + inherited Destroy; +end; + +{-------------------------------------------------------------------} +{ Convert the numeric return code from an MMSYSTEM function to a string + using midioutGetErrorText. TODO: These errors aren't very helpful + (e.g. "an invalid parameter was passed to a system function") so + some proper error strings would be nice. } + + +function Tmidioutput.midioutErrorString(WError: Word): string; +var + errorDesc: PChar; +begin + errorDesc := nil; + try + errorDesc := StrAlloc(MAXERRORLENGTH); + if midioutGetErrorText(WError, errorDesc, MAXERRORLENGTH) = 0 then + result := StrPas(errorDesc) + else + result := 'Specified error number is out of range'; + finally + if errorDesc <> nil then StrDispose(errorDesc); + end; +end; + +{-------------------------------------------------------------------} +{ Set the output device ID and change the other properties to match } + +procedure Tmidioutput.SetDeviceID(DeviceID: Cardinal); +var + midioutCaps: TmidioutCaps; +begin + if FState = mosOpen then + raise EmidioutputError.Create('Change to DeviceID while device was open') + else + if (DeviceID >= midioutGetNumDevs) and (DeviceID <> MIDI_MAPPER) then + raise EmidioutputError.Create('Invalid device ID') + else + begin + FDeviceID := DeviceID; + + { Set the name and other midioutCAPS properties to match the ID } + FError := + midioutGetDevCaps(DeviceID, @midioutCaps, sizeof(TmidioutCaps)); + if Ferror > 0 then + raise EmidioutputError.Create(midioutErrorString(FError)); + + with midiOutCaps do + begin + FProductName := StrPas(szPname); + FDriverVersion := vDriverVersion; + FTechnology := OutPortTech(wTechnology); + FVoices := wVoices; + FNotes := wNotes; + FChannelMask := wChannelMask; + FSupport := dwSupport; + end; + + end; +end; + +{-------------------------------------------------------------------} +{ Set the product name property and put the matching output device number + in FDeviceID. + This is handy if you want to save a configured output/output device + by device name instead of device number, because device numbers may + change if users install or remove MIDI devices. + Exception if output device with matching name not found, + or if output device is open } + +procedure Tmidioutput.SetProductName(NewProductName: string); +var + midioutCaps: TmidioutCaps; + testDeviceID: Integer; + testProductName: string; +begin + if FState = mosOpen then + raise EmidioutputError.Create('Change to ProductName while device was open') + else + { Don't set the name if the component is reading properties because + the saved Productname will be from the machine the application was compiled + on, which may not be the same for the corresponding DeviceID on the user's + machine. The FProductname property will still be set by SetDeviceID } + if not (csLoading in ComponentState) then + begin + { Loop uses -1 to test for MIDI_MAPPER as well } + for testDeviceID := -1 to (midioutGetNumDevs - 1) do + begin + FError := + midioutGetDevCaps(testDeviceID, @midioutCaps, sizeof(TmidioutCaps)); + if Ferror > 0 then + raise EmidioutputError.Create(midioutErrorString(FError)); + testProductName := StrPas(midioutCaps.szPname); + if testProductName = NewProductName then + begin + FProductName := NewProductName; + Break; + end; + end; + if FProductName <> NewProductName then + raise EmidioutputError.Create('MIDI output Device ' + + NewProductName + ' not installed') + else + SetDeviceID(testDeviceID); + end; +end; + +{-------------------------------------------------------------------} +{ Set the output technology property and put the matching output device + number in FDeviceID. + This is handy, for example, if you want to be able to switch between a + sound card and a MIDI port } + +procedure TMidiOutput.SetTechnology(NewTechnology: OutPortTech); +var + midiOutCaps: TMidiOutCaps; + testDeviceID: Integer; + testTechnology: OutPortTech; +begin + if FState = mosOpen then + raise EMidiOutputError.Create( + 'Change to Product Technology while device was open') + else + begin + { Loop uses -1 to test for MIDI_MAPPER as well } + for testDeviceID := -1 to (midiOutGetNumDevs - 1) do + begin + FError := + midiOutGetDevCaps(testDeviceID, + @midiOutCaps, sizeof(TMidiOutCaps)); + if Ferror > 0 then + raise EMidiOutputError.Create(MidiOutErrorString(FError)); + testTechnology := OutPortTech(midiOutCaps.wTechnology); + if testTechnology = NewTechnology then + begin + FTechnology := NewTechnology; + Break; + end; + end; + if FTechnology <> NewTechnology then + raise EMidiOutputError.Create('MIDI output technology ' + + TechName[NewTechnology] + ' not installed') + else + SetDeviceID(testDeviceID); + end; +end; + +{-------------------------------------------------------------------} + +function Tmidioutput.Open: Boolean; +var + hMem: THandle; +begin + Result := False; + try + { Create the control info for the DLL } + if (PCtlInfo = nil) then + begin + PCtlInfo := GlobalSharedLockedAlloc(Sizeof(TMidiCtlInfo), hMem); + PctlInfo^.hMem := hMem; + end; + + Pctlinfo^.hWindow := Handle; { Control's window handle } + + FError := midioutOpen(@FMidiHandle, FDeviceId, + DWORD(@midiHandler), + DWORD(PCtlInfo), + CALLBACK_FUNCTION); +{ FError := midioutOpen(@FMidiHandle, FDeviceId, + Handle, + DWORD(PCtlInfo), + CALLBACK_WINDOW); } + if (FError <> 0) then + { TODO: use CreateFmtHelp to add MIDI device name/ID to message } + raise EmidioutputError.Create(midioutErrorString(FError)) + else + begin + Result := True; + FState := mosOpen; + end; + + except + if PCtlInfo <> nil then + begin + GlobalSharedLockedFree(PCtlInfo^.hMem, PCtlInfo); + PCtlInfo := nil; + end; + end; + +end; + +{-------------------------------------------------------------------} + +procedure TMidiOutput.PutShort(MidiMessage: Byte; Data1: Byte; Data2: Byte); +var + thisMsg: DWORD; +begin + thisMsg := DWORD(MidiMessage) or + (DWORD(Data1) shl 8) or + (DWORD(Data2) shl 16); + + FError := midiOutShortMsg(FMidiHandle, thisMsg); + if Ferror > 0 then + raise EmidioutputError.Create(midioutErrorString(FError)); +end; + +{-------------------------------------------------------------------} + +procedure TMidiOutput.PutLong(TheSysex: Pointer; msgLength: Word); +{ Notes: This works asynchronously; you send your sysex output by +calling this function, which returns immediately. When the MIDI device +driver has finished sending the data the MidiOutPut function in this +component is called, which will in turn call the OnMidiOutput method +if the component user has defined one. } +{ TODO: Combine common functions with PutTimedLong into subroutine } + +var + MyMidiHdr: TMyMidiHdr; +begin + { Initialize the header and allocate buffer memory } + MyMidiHdr := TMyMidiHdr.Create(msgLength); + + { Copy the data over to the MidiHdr buffer + We can't just use the caller's PChar because the buffer memory + has to be global, shareable, and locked. } + StrMove(MyMidiHdr.SysexPointer, TheSysex, msgLength); + + { Store the MyMidiHdr address in the header so we can find it again quickly + (see the MidiOutput proc) } + MyMidiHdr.hdrPointer^.dwUser := DWORD(MyMidiHdr); + + { Get MMSYSTEM's blessing for this header } + FError := midiOutPrepareHeader(FMidiHandle, MyMidiHdr.hdrPointer, + sizeof(TMIDIHDR)); + if Ferror > 0 then + raise EMidiOutputError.Create(MidiOutErrorString(FError)); + + { Send it } + FError := midiOutLongMsg(FMidiHandle, MyMidiHdr.hdrPointer, + sizeof(TMIDIHDR)); + if Ferror > 0 then + raise EMidiOutputError.Create(MidiOutErrorString(FError)); + +end; + +{-------------------------------------------------------------------} + +procedure Tmidioutput.PutMidiEvent(theEvent: TMyMidiEvent); +begin + if FState <> mosOpen then + raise EMidiOutputError.Create('MIDI Output device not open'); + + with theEvent do + begin + if Sysex = nil then + begin + PutShort(MidiMessage, Data1, Data2) + end + else + PutLong(Sysex, SysexLength); + end; +end; + +{-------------------------------------------------------------------} + +function Tmidioutput.Close: Boolean; +begin + Result := False; + if FState = mosOpen then + begin + + { Note this sends a lot of fast control change messages which some synths can't handle. + TODO: Make this optional. } +{ FError := midioutReset(FMidiHandle); + if Ferror <> 0 then + raise EMidiOutputError.Create(MidiOutErrorString(FError)); } + + FError := midioutClose(FMidiHandle); + if Ferror <> 0 then + raise EMidiOutputError.Create(MidiOutErrorString(FError)) + else + Result := True; + end; + + FMidiHandle := 0; + FState := mosClosed; + +end; + +{-------------------------------------------------------------------} + +procedure TMidiOutput.SetVolume(Left: Word; Right: Word); +var + dwVolume: DWORD; +begin + dwVolume := (DWORD(Left) shl 16) or Right; + FError := midiOutSetVolume(DeviceID, dwVolume); + if Ferror <> 0 then + raise EMidiOutputError.Create(MidiOutErrorString(FError)); +end; + +{-------------------------------------------------------------------} + +procedure Tmidioutput.midioutput(var Message: TMessage); +{ Triggered when sysex output from PutLong is complete } +var + MyMidiHdr: TMyMidiHdr; + thisHdr: PMidiHdr; +begin + if Message.Msg = Mom_Done then + begin + { Find the MIDIHDR we used for the output. Message.lParam is its address } + thisHdr := PMidiHdr(Message.lParam); + + { Remove it from the output device } + midiOutUnprepareHeader(FMidiHandle, thisHdr, sizeof(TMIDIHDR)); + + { Get the address of the MyMidiHdr object containing this MIDIHDR structure. + We stored this address in the PutLong procedure } + MyMidiHdr := TMyMidiHdr(thisHdr^.dwUser); + + { Header and copy of sysex data no longer required since output is complete } + MyMidiHdr.Free; + + { Call the user's event handler if any } + if Assigned(FOnmidioutput) then + FOnmidioutput(Self); + end; + { TODO: Case for MOM_PLAYBACK_DONE } +end; + +{-------------------------------------------------------------------} + +procedure Register; +begin + RegisterComponents('Synth', [Tmidioutput]); +end; + +end. + diff --git a/VideoPreview/src/lib/midi/demo/MidiTest.dfm b/VideoPreview/src/lib/midi/demo/MidiTest.dfm Binary files differnew file mode 100644 index 00000000..0d0ae182 --- /dev/null +++ b/VideoPreview/src/lib/midi/demo/MidiTest.dfm diff --git a/VideoPreview/src/lib/midi/demo/MidiTest.pas b/VideoPreview/src/lib/midi/demo/MidiTest.pas new file mode 100644 index 00000000..793db730 --- /dev/null +++ b/VideoPreview/src/lib/midi/demo/MidiTest.pas @@ -0,0 +1,249 @@ +// Test application for TMidiFile + +unit MidiTest; + +interface + +uses + Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs, + StdCtrls, MidiFile, ExtCtrls, MidiOut, MidiType, MidiScope, Grids; +type + TMidiPlayer = class(TForm) + OpenDialog1: TOpenDialog; + Button1: TButton; + Button3: TButton; + Button4: TButton; + MidiOutput1: TMidiOutput; + cmbInput: TComboBox; + MidiFile1: TMidiFile; + MidiScope1: TMidiScope; + Label3: TLabel; + edtBpm: TEdit; + Memo2: TMemo; + edtTime: TEdit; + Button2: TButton; + TrackGrid: TStringGrid; + TracksGrid: TStringGrid; + edtLength: TEdit; + procedure Button1Click(Sender: TObject); + procedure MidiFile1MidiEvent(event: PMidiEvent); + procedure Button3Click(Sender: TObject); + procedure Button4Click(Sender: TObject); + procedure FormCreate(Sender: TObject); + procedure cmbInputChange(Sender: TObject); + procedure MidiFile1UpdateEvent(Sender: TObject); + procedure Button2Click(Sender: TObject); + procedure edtBpmKeyPress(Sender: TObject; var Key: Char); + procedure TracksGridSelectCell(Sender: TObject; Col, Row: Integer; + var CanSelect: Boolean); + procedure FormShow(Sender: TObject); + private + { Private declarations } + MidiOpened : boolean; + procedure SentAllNotesOff; + + procedure MidiOpen; + procedure MidiClose; + + public + { Public declarations } + end; + +var + MidiPlayer: TMidiPlayer; + +implementation + +{$R *.DFM} + +procedure TMidiPlayer.Button1Click(Sender: TObject); +var + i,j: integer; + track : TMidiTrack; + event : PMidiEvent; +begin + if opendialog1.execute then + begin + midifile1.filename := opendialog1.filename; + midifile1.readfile; +// label1.caption := IntToStr(midifile1.NumberOfTracks); + edtBpm.text := IntToStr(midifile1.Bpm); +// TracksGrid.cells.clear; + for i := 0 to midifile1.NumberOfTracks-1 do + begin + track := midifile1.getTrack(i); + TracksGrid.cells[0,i] := 'Tr: '+ track.getName + ' '+ track.getInstrument ; + end; + edtLength.Text := MyTimeToStr(MidiFile1.GetTrackLength); + end; +end; + +procedure TMidiPlayer.MidiFile1MidiEvent(event: PMidiEvent); +var mEvent : TMyMidiEvent; +begin + mEvent := TMyMidiEvent.Create; + if not (event.event = $FF) then + begin + mEvent.MidiMessage := event.event; + mEvent.data1 := event.data1; + mEvent.data2 := event.data2; + midioutput1.PutMidiEvent(mEvent); + end + else + begin + if (event.data1 >= 1) and (event.data1 < 15) then + begin + memo2.Lines.add(IntToStr(event.data1) + ' '+ event.str); + end + end; + midiScope1.MidiEvent(event.event,event.data1,event.data2); + mEvent.Destroy; +end; + +procedure TMidiPlayer.SentAllNotesOff; +var mEvent : TMyMidiEvent; +channel : integer; +begin + mEvent := TMyMidiEvent.Create; + for channel:= 0 to 15 do + begin + mEvent.MidiMessage := $B0 + channel; + mEvent.data1 := $78; + mEvent.data2 := 0; + if MidiOpened then + midioutput1.PutMidiEvent(mEvent); + midiScope1.MidiEvent(mEvent.MidiMessage,mEvent.data1,mEvent.data2); + end; + mEvent.Destroy; +end; + +procedure TMidiPlayer.Button3Click(Sender: TObject); +begin + midifile1.StartPlaying; +end; + +procedure TMidiPlayer.Button4Click(Sender: TObject); +begin + midifile1.StopPlaying; + SentAllNotesOff; +end; + +procedure TMidiPlayer.MidiOpen; +begin + if not (cmbInput.Text = '') then + begin + MidiOutput1.ProductName := cmbInput.Text; + MidiOutput1.OPEN; + MidiOpened := true; + end; +end; + +procedure TMidiPlayer.MidiClose; +begin + if MidiOpened then + begin + MidiOutput1.Close; + MidiOpened := false; + end; +end; + + +procedure TMidiPlayer.FormCreate(Sender: TObject); +var thisDevice : integer; +begin + for thisDevice := 0 to MidiOutput1.NumDevs - 1 do + begin + MidiOutput1.DeviceID := thisDevice; + cmbInput.Items.Add(MidiOutput1.ProductName); + end; + cmbInput.ItemIndex := 0; + MidiOpened := false; + MidiOpen; +end; + +procedure TMidiPlayer.cmbInputChange(Sender: TObject); +begin + MidiClose; + MidiOPen; +end; + +procedure TMidiPlayer.MidiFile1UpdateEvent(Sender: TObject); +begin + edtTime.Text := MyTimeToStr(MidiFile1.GetCurrentTime); + edtTime.update; + if MidiFile1.ready then + begin + midifile1.StopPlaying; + SentAllNotesOff; + end; +end; + +procedure TMidiPlayer.Button2Click(Sender: TObject); +begin + MidiFile1.ContinuePlaying; +end; + +procedure TMidiPlayer.edtBpmKeyPress(Sender: TObject; var Key: Char); +begin + if Key = char(13) then + begin + MidiFile1.Bpm := StrToInt(edtBpm.Text); + edtBpm.text := IntToStr(midifile1.Bpm); + abort; + end; + +end; + +procedure TMidiPlayer.TracksGridSelectCell(Sender: TObject; Col, + Row: Integer; var CanSelect: Boolean); +var + MidiTrack : TMidiTrack; + i : integer; + j : integer; + event : PMidiEvent; +begin + CanSelect := false; + if Row < MidiFile1.NumberOfTracks then + begin + CanSelect := true; + MidiTrack := MidiFile1.GetTrack(Row); + TrackGrid.RowCount := 2; + TrackGrid.RowCount := MidiTrack.getEventCount; + j := 1; + for i := 0 to MidiTrack.GetEventCount-1 do + begin + event := MidiTrack.getEvent(i); + if not (event.len = -1) then + begin // do not print when + TrackGrid.cells[0,j] := IntToStr(i); + TrackGrid.cells[1,j] := MyTimeToStr(event.time); + TrackGrid.cells[2,j] := IntToHex(event.event,2); + if not (event.event = $FF) then + begin + TrackGrid.cells[3,j] := IntToStr(event.len); + TrackGrid.cells[4,j] := KeyToStr(event.data1); + TrackGrid.cells[5,j] := IntToStr(event.data2); + end + else + begin + TrackGrid.cells[3,j] := IntToStr(event.data1); + TrackGrid.cells[4,j] := ''; + TrackGrid.cells[5,j] := event.str; + end; + inc(j); + end; + end; + TrackGrid.RowCount := j; + end; +end; + +procedure TMidiPlayer.FormShow(Sender: TObject); +begin + TrackGrid.ColWidths[0] := 30; + TrackGrid.ColWidths[2] := 30; + TrackGrid.ColWidths[3] := 30; + TrackGrid.ColWidths[4] := 30; + TrackGrid.ColWidths[5] := 100; +end; + +end. diff --git a/VideoPreview/src/lib/midi/demo/Project1.dpr b/VideoPreview/src/lib/midi/demo/Project1.dpr new file mode 100644 index 00000000..7aa4e512 --- /dev/null +++ b/VideoPreview/src/lib/midi/demo/Project1.dpr @@ -0,0 +1,13 @@ +program Project1; + +uses + Forms, + MidiTest in 'MidiTest.pas' {MidiPlayer}; + +{$R *.RES} + +begin + Application.Initialize; + Application.CreateForm(TMidiPlayer, MidiPlayer); + Application.Run; +end. diff --git a/VideoPreview/src/lib/midi/demo/Project1.res b/VideoPreview/src/lib/midi/demo/Project1.res Binary files differnew file mode 100644 index 00000000..2b020d69 --- /dev/null +++ b/VideoPreview/src/lib/midi/demo/Project1.res diff --git a/VideoPreview/src/lib/midi/midiComp.cfg b/VideoPreview/src/lib/midi/midiComp.cfg new file mode 100644 index 00000000..8b774c81 --- /dev/null +++ b/VideoPreview/src/lib/midi/midiComp.cfg @@ -0,0 +1,35 @@ +-$A+ +-$B- +-$C+ +-$D+ +-$E- +-$F- +-$G+ +-$H+ +-$I+ +-$J+ +-$K- +-$L+ +-$M- +-$N+ +-$O+ +-$P+ +-$Q- +-$R- +-$S- +-$T- +-$U- +-$V+ +-$W- +-$X+ +-$Y- +-$Z1 +-cg +-AWinTypes=Windows;WinProcs=Windows;DbiTypes=BDE;DbiProcs=BDE;DbiErrs=BDE; +-H+ +-W+ +-M +-$M16384,1048576 +-K$00400000 +-LE"d:\program files\borland\delphi5\Projects\Bpl" +-LN"d:\program files\borland\delphi5\Projects\Bpl" diff --git a/VideoPreview/src/lib/midi/midiComp.dpk b/VideoPreview/src/lib/midi/midiComp.dpk new file mode 100644 index 00000000..7c403eae --- /dev/null +++ b/VideoPreview/src/lib/midi/midiComp.dpk @@ -0,0 +1,45 @@ +package midiComp;
+
+{$R *.RES}
+{$R 'MidiFile.dcr'}
+{$R 'Midiin.dcr'}
+{$R 'Midiout.dcr'}
+{$R 'MidiScope.dcr'}
+{$ALIGN ON}
+{$ASSERTIONS ON}
+{$BOOLEVAL OFF}
+{$DEBUGINFO ON}
+{$EXTENDEDSYNTAX ON}
+{$IMPORTEDDATA ON}
+{$IOCHECKS ON}
+{$LOCALSYMBOLS ON}
+{$LONGSTRINGS ON}
+{$OPENSTRINGS ON}
+{$OPTIMIZATION ON}
+{$OVERFLOWCHECKS OFF}
+{$RANGECHECKS OFF}
+{$REFERENCEINFO OFF}
+{$SAFEDIVIDE OFF}
+{$STACKFRAMES OFF}
+{$TYPEDADDRESS OFF}
+{$VARSTRINGCHECKS ON}
+{$WRITEABLECONST ON}
+{$MINENUMSIZE 1}
+{$IMAGEBASE $400000}
+{$DESCRIPTION 'Midi related components'}
+{$DESIGNONLY}
+{$IMPLICITBUILD ON}
+
+requires
+ vcl50;
+
+contains
+ Miditype in 'Miditype.pas',
+ Mididefs in 'Mididefs.pas',
+ MidiFile in 'MidiFile.pas',
+ Midiin in 'Midiin.pas',
+ Midiout in 'Midiout.pas',
+ MidiScope in 'MidiScope.pas',
+ Midicons in 'Midicons.pas';
+
+end.
diff --git a/VideoPreview/src/lib/midi/midiComp.res b/VideoPreview/src/lib/midi/midiComp.res Binary files differnew file mode 100644 index 00000000..91fb756e --- /dev/null +++ b/VideoPreview/src/lib/midi/midiComp.res diff --git a/VideoPreview/src/lib/midi/readme.txt b/VideoPreview/src/lib/midi/readme.txt new file mode 100644 index 00000000..7112aecf --- /dev/null +++ b/VideoPreview/src/lib/midi/readme.txt @@ -0,0 +1,60 @@ + +Midi components + TMidiFile, TMidiScope + TMidiIn and TMidiOut of david Churcher are included because they are used in + the demo application + +Freeware. + +100% source code, demo application. + +Included Components/Classes + +TMidiFile, read a midifile and have the contents available in memory + list of Tracks, track is list of events + + +TMidiScope, show all activity on a midi device + +TMidiIn and TMidiOut of David Churcher are included because they are used +in the demo application + +Midiplayer is a demo application which plays a midifile on a midi output + it is build fairly simple with the included components. The timer is used + to time the midievents. The timing is therefor as good as the windows timer. + + + The header of midifile,midiscope contains help information on the properties/functions + The example Midiplayer gives a good idea how to use the components + +Installation + open midiComp.dpk with file/open + compile and install the package + make sure that the directory where the files are located is in the library path + (tools/environment options/library) + +to run the demo + open project1.dpr in the demo directory and press run. + + + +history +1.0 18-1-1999 first release + +1.1 5-3-1999 update + added some functions for display purposes + improved demo to include event viewer + bpm can be changed + +1.2 24-2-2000 update + added some functions to see the length of a song and ready function to know when playback is ready + +for comments/bugs in these components: + +Frans Bouwmans +fbouwmans@spiditel.nl + +I'm busy building a software music synthesizer, which will be available in source +to the public. If you are interrested in helping me with certain soundmodules +(effects, filters, sound generators) just sent me an email. + |