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 程式師世界 >> 編程語言 >> 更多編程語言 >> Delphi >> 用多媒體庫 Bass.dll 播放 mp3 [6] - 是否循環播放

用多媒體庫 Bass.dll 播放 mp3 [6] - 是否循環播放

編輯:Delphi

 本例效果圖:

用多媒體庫 Bass.dll 播放 mp3 [6] - 是否循環播放

  代碼文件:unit Unit1;
interface
uses
 Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
 Dialogs, StdCtrls, ExtCtrls;
type
 TForm1 = class(TForm)
  OpenDialog1: TOpenDialog;
  Button1: TButton;
  Button2: TButton;
  Button3: TButton;
  CheckBox1: TCheckBox;
  procedure FormCreate(Sender: TObject);
  procedure Button1Click(Sender: TObject);
  procedure Button2Click(Sender: TObject);
  procedure Button3Click(Sender: TObject);
  procedure FormDestroy(Sender: TObject);
  procedure CheckBox1Click(Sender: TObject);
 end;
var
 Form1: TForm1;
implementation
{$R *.dfm}
uses Bass;
var
 hs: HSTREAM; {流句柄}
procedure TForm1.FormCreate(Sender: TObject);
begin
 CheckBox1.Caption := '循環播放';
 if HiWord(BASS_GetVersion) <> BASSVERSION then
  MessageBox(0, '"Bass.dll" 文件版本不合適! ', nil, MB_ICONERROR);
 if not BASS_Init(-1, 44100, 0, 0, nil) then
  ShowMessage('初始化錯誤');
end;
{打開}
procedure TForm1.Button1Click(Sender: TObject);
var
 Mp3Path: AnsiString;
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);
 {想下面這樣建立播放流, 直接就是循環播放的}
 //hs := BASS_StreamCreateFile(False, PAnsiChar(Mp3Path), 0, 0, BASS_SAMPLE_LOOP);
 if hs < BASS_ERROR_ENDED then
  Text := '打開失敗'
 else
  Text := string(Mp3Path);
end;
{播放}
procedure TForm1.Button2Click(Sender: TObject);
begin
 BASS_ChannelPlay(hs, False);
end;
{暫停}
procedure TForm1.Button3Click(Sender: TObject);
begin
 BASS_ChannelPause(hs);
end;
{是否循環播放}
procedure TForm1.CheckBox1Click(Sender: TObject);
begin
 if CheckBox1.Checked then
  BASS_ChannelFlags(hs, BASS_SAMPLE_LOOP, BASS_SAMPLE_LOOP)
 else
  BASS_ChannelFlags(hs, 0, BASS_SAMPLE_LOOP);
end;
procedure TForm1.FormDestroy(Sender: TObject);
begin
 BASS_Free;
end;
end.
窗體文件:object Form1: TForm1
 Left = 0
 Top = 0
 Caption = 'Form1'
 ClIEntHeight = 90
 ClIEntWidth = 207
 Color = clBtnFace
 Font.Charset = DEFAULT_CHARSET
 Font.Color = clWindowText
 Font.Height = -11
 Font.Name = 'Tahoma'
 Font.Style = []
 OldCreateOrder = False
 OnCreate = FormCreate
 OnDestroy = FormDestroy
 PixelsPerInch = 96
 TextHeight = 13
 object Button1: TButton
  Left = 25
  Top = 17
  Width = 75
  Height = 25
  Caption = #25171#24320
  TabOrder = 0
  OnClick = Button1Click
 end
 object Button2: TButton
  Left = 25
  Top = 48
  Width = 75
  Height = 25
  Caption = #25773#25918
  TabOrder = 1
  OnClick = Button2Click
 end
 object Button3: TButton
  Left = 106
  Top = 17
  Width = 75
  Height = 25
  Caption = #26242#20572
  TabOrder = 2
  OnClick = Button3Click
 end
 object CheckBox1: TCheckBox
  Left = 110
  Top = 52
  Width = 97
  Height = 17
  Caption = 'CheckBox1'
  TabOrder = 3
  OnClick = CheckBox1Click
 end
 object OpenDialog1: TOpenDialog
  Left = 192
  Top = 8
 end


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