用多媒体库 Bass.dll 播放 mp3 [6] - 是否循环播放
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); {像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.窗体文件:
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 endposted on 2008-08-19 00:53 万一 阅读(3585) 评论(0) 编辑 收藏