本例效果图:
代码文件:
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 := '循环播放';
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;
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);
{想下面这样建立播放流, 直接就是循环播放的}
//hs := BASS_StreamCreateFile(False, PAnsiChar(Mp3Path), 0, 0, BASS_SAMPLE_LOOP);
if hs < BASS_ERROR_ENDED then
Text := '打开失败'
else
Text := string(Mp3Path);
end;
{播放}
procedure TForm1.Button2Click(Sender: TObject);
begin
BASS_ChannelPlay(hs, False);
end;
{暂停}
procedure TForm1.Button3Click(Sender: TObject);
begin
BASS_ChannelPause(hs);
end;
{是否循环播放}
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.