Delphi中用多媒體庫Bass.dll播放mp3 [2] - BASS_GetDeviceInfo: 獲取當前音頻輸出設備列表
Delphi 2009 中使用需要修改一下 Bass.pas 中 BASS_DEVICEINFO 結構的定義, 不然會 亂碼:
//把
BASS_DEVICEINFO = record
name: PChar; // description
driver: PChar; // driver
flags: DWORD;
end;
//改為
BASS_DEVICEINFO = record
name: PAnsiChar; // description
driver: PAnsiChar; // driver
flags: DWORD;
end;
本例效果圖:
代碼文件:
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;
type
TForm1 = class(TForm)
Button1: TButton;
ListBox1: TListBox;
procedure FormCreate(Sender: TObject);
procedure Button1Click(Sender: TObject);
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
uses Bass;
procedure TForm1.FormCreate(Sender: TObject);
begin
if HiWord(BASS_GetVersion) <> BASSVERSION then
MessageBox(0, '"Bass.dll" 文件版本不合適! ', nil, MB_ICONERROR);
ListBox1.Align := alTop;
Button1.Caption := '獲取當前音頻輸出設備列表';
end;
procedure TForm1.Button1Click(Sender: TObject);
var
info: BASS_DEVICEINFO;
i: Integer;
begin
i := 1;
while BASS_GetDeviceInfo(i, info) do
begin
ListBox1.Items.Add(string(info.name));
Inc(i);
end;
end;
end.
窗體文件:
object Form1: TForm1
Left = 0
Top = 0
Caption = 'Form1'
ClientHeight = 125
ClientWidth = 195
Color = clBtnFace
Font.Charset = DEFAULT_CHARSET
Font.Color = clWindowText
Font.Height = -11
Font.Name = 'Tahoma'
Font.Style = []
OldCreateOrder = False
OnCreate = FormCreate
PixelsPerInch = 96
TextHeight = 13
object Button1: TButton
Left = 8
Top = 86
Width = 179
Height = 25
Caption = 'Button1'
TabOrder = 0
OnClick = Button1Click
end
object ListBox1: TListBox
Left = 24
Top = 8
Width = 113
Height = 73
ItemHeight = 13
TabOrder = 1
end