1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
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.
|
