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|
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
Gauges, StdCtrls, ExtCtrls, ComCtrls, MMSystem;
type
TForm1 = class(TForm)
Button1: TButton;
Button2: TButton;
Gauge1: TGauge;
Timer1: TTimer;
OpenDialog1: TOpenDialog;
StatusBar1: TStatusBar;
procedure Timer1Timer(Sender: TObject);
procedure Button2Click(Sender: TObject);
procedure Button1Click(Sender: TObject);
procedure FormCreate(Sender: TObject);
private
Duree: String;
protected
function ExtractFileName(aFilename:String; WithExt: Boolean):String;
function SecondesToJHMS(Time: Double): String;
public
procedure PlayMidi();
procedure StopMidi();
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
function TForm1.ExtractFileName(aFilename:String; WithExt: Boolean):String;
var i: Integer;
begin
aFileName := SysUtils.ExtractFileName(aFileName);
if WithExt then Result := aFileName
else
begin
Result := '';
i :=0;
while (aFileName[i] <> '.') do
begin
Result := Result + aFileName[i];
Inc(i);
end;
Result := Trim(Result);
end;
end;
function TForm1.SecondesToJHMS(Time: Double): String;
var
base,
res,
r: integer;
SL: TStringList;
I: integer;
Num: Integer;
begin
Result := '';
base := 60;
Num := Trunc(Time);
if num <= 0 then Result := '00';
SL := TStringList.Create;
While(Num>0) do
begin
res := Num div base;
r := Num mod base;
Num := res;
SL.Add(IntToStr(r));
end;
for I := SL.Count -1 DownTo 0 do
begin
if (I = 0) then Result := Result + Format('%.2u',[trunc( StrToInt(SL[I]) )])
else
Result := Result + Format('%.2u',[trunc( StrToInt(SL[I]) )]) +':';
end;
SL.Free;
end;
procedure TForm1.PlayMidi();
var
TotalTime: array[0..128] of char;
filename: String;
begin
if form1.Opendialog1.Execute then
begin
filename := form1.opendialog1.filename;
MCISendString(PChar('close song'), nil, 0, 0);
MCISendString(PChar('open ' + filename + ' alias song'),nil , 0, 0);
MCISendString(PChar('set song time format ms'), 0, 0, 0);
MCISendString(PChar('status song length'), TotalTime, 128, 0);
MCISendString(PChar('play song'),nil, 0, 0);
Gauge1.Progress := 0;
Gauge1.MaxValue := strtoint(TotalTime);
Timer1.Enabled := true;
Duree := TrimRight(String(TotalTime));
StatusBar1.Panels[0].Text := ExtractFileName(filename, False) + ' '
+ SecondesToJHMS(strtofloat(Duree) /1000);
StatusBar1.Panels[1].Text := SecondesToJHMS(strtofloat(Duree) /1000);
end;
end;
procedure TForm1.StopMidi();
begin
Timer1.Enabled := false;
MCISendString(PChar('stop song'), nil, 0, 0);
end;
procedure TForm1.Timer1Timer(Sender: TObject);
var
TimePos: array[0..128] of char;
begin
with Gauge1 do
begin
if progress < MaxValue then
begin
MCISendString(PChar('set song time format milliseconds'), nil, 0, 0);
MCISendString(PChar('STATUS SONG POSITION'), TimePos, 128, 0);
Gauge1.Progress := StrToInt(TimePos);
StatusBar1.Panels[1].Text := SecondesToJHMS(strtofloat(Duree) /1000 );
Duree := FloatToStr(strtofloat(Duree) - Timer1.Interval);
end else Timer1.Enabled := False;
end;
end;
procedure TForm1.Button2Click(Sender: TObject);
begin
StopMidi();
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
PlayMidi();
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
Timer1.Interval := 1000;
end;
end. |
