学步园

本例效果图:

---

代码文件:

---

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, ExtCtrls, ComCtrls;

type
  TForm1 = class(TForm)
    OpenDialog1: TOpenDialog;
    PaintBox1: TPaintBox;
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    ColorBox1: TColorBox;
    ColorBox2: TColorBox;
    procedure FormCreate(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure ColorBox1Change(Sender: TObject);
    procedure ColorBox2Change(Sender: TObject);
    procedure FormDestroy(Sender: TObject);
    procedure PaintBox1Paint(Sender: TObject);
  private
    procedure Draw;
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

uses Bass;

var
  hs: HSTREAM;  {流句柄}
  Data: array of Cardinal;
  bit: TBitmap;

procedure TForm1.FormCreate(Sender: TObject);
begin
  bit := TBitmap.Create;
  PaintBox1.Align := alTop;
  ColorBox1.Selected := clBlack;
  ColorBox2.Selected := clLime;

  if HiWord(BASS_GetVersion)  BASSVERSION then
    MessageBox(0, '"Bass.dll" 文件版本不合适! ', nil, MB_ICONERROR);

  if not BASS_Init(-1, 44100, 0, 0, nil) then ShowMessage('初始化错误');
end;

{打开}
procedure TForm1.Button1Click(Sender: TObject);
var
  Mp3Path: AnsiString;
  i: Cardinal;
  time: Double;
  hs2: HSTREAM;
begin
  BASS_StreamFree(hs);

  OpenDialog1.Filter := 'Mp3 文件(*.mp3)|*.mp3|Wav 文件(*.wav)|*wav';
  if OpenDialog1.Execute then
    Mp3Path := AnsiString(OpenDialog1.FileName);

  hs := BASS_StreamCreateFile(False, PAnsiChar(Mp3Path), 0, 0, 0);
  if hs 

窗体文件:

---

object Form1: TForm1
  Left = 222
  Top = 114
  Caption = 'Form1'
  ClientHeight = 173
  ClientWidth = 504
  Color = clBtnFace
  Font.Charset = DEFAULT_CHARSET
  Font.Color = clWindowText
  Font.Height = -11
  Font.Name = 'Tahoma'
  Font.Style = []
  OldCreateOrder = False
  Position = poDesigned
  OnCreate = FormCreate
  OnDestroy = FormDestroy
  PixelsPerInch = 96
  TextHeight = 13
  object PaintBox1: TPaintBox
    Left = 40
    Top = 0
    Width = 105
    Height = 131
    OnPaint = PaintBox1Paint
  end
  object Button1: TButton
    Left = 8
    Top = 137
    Width = 75
    Height = 25
    Caption = #25171#24320
    TabOrder = 0
    OnClick = Button1Click
  end
  object Button2: TButton
    Left = 89
    Top = 137
    Width = 75
    Height = 25
    Caption = #25773#25918
    TabOrder = 1
    OnClick = Button2Click
  end
  object Button3: TButton
    Left = 170
    Top = 137
    Width = 75
    Height = 25
    Caption = #26242#20572
    TabOrder = 2
    OnClick = Button3Click
  end
  object ColorBox1: TColorBox
    Left = 315
    Top = 139
    Width = 85
    Height = 22
    ItemHeight = 16
    TabOrder = 3
    OnChange = ColorBox1Change
  end
  object ColorBox2: TColorBox
    Left = 406
    Top = 139
    Width = 90
    Height = 22
    ItemHeight = 16
    TabOrder = 4
    OnChange = ColorBox2Change
  end
  object OpenDialog1: TOpenDialog
    Left = 192
    Top = 32
  end
end