仅在Inno设置的特定页面中播放声音

问题描述

我正在使用Inno Setup为我的应用程序创建安装程序。我使用BASS音频库在安装程序的后台播放音乐。

这是我播放声音的代码。

[Code]
const
  DI_norMAL = 3;
  FR_PRIVATE = $10;  {added to compact Mode}
  BASS_SAMPLE_LOOP = 4;
  BASS_ACTIVE_STOPPED = 0;
  BASS_ACTIVE_PLAYING = 1;
  BASS_ACTIVE_STALLED = 2;
  BASS_ACTIVE_PAUSED  = 3;
  BASS_UNICODE = $80000000;
  BASS_CONfig_GVOL_STREAM = {#MusicVolume};
  EncodingFlag = BASS_UNICODE;
  #if CheckCRC == "1"
  PM_REMOVE = 1;
  WM_QUIT   = 18;
  #endif

function BASS_Init(device: LongInt; freq,flags: DWORD; win: HWND; clsid: Cardinal): BOOL;
  external 'BASS_Init@files:bass.dll stdcall';
function BASS_StreamCreateFile(mem: BOOL; f: string; offset1: DWORD; offset2: DWORD; length1: DWORD; length2: DWORD; flags: DWORD): HSTREAM;
  external 'BASS_StreamCreateFile@files:bass.dll stdcall';
function BASS_Start: BOOL;
  external 'BASS_Start@files:bass.dll stdcall';
function BASS_Pause: BOOL;
  external 'BASS_Pause@files:bass.dll stdcall';
function BASS_ChannelPlay(handle: DWORD; restart: BOOL): BOOL;
  external 'BASS_ChannelPlay@files:bass.dll stdcall';
function BASS_SetConfig(option: DWORD; value: DWORD ): BOOL;
  external 'BASS_SetConfig@files:bass.dll stdcall';
function BASS_ChannelIsActive(handle: DWORD): DWORD;
  external 'BASS_ChannelIsActive@files:bass.dll stdcall';
function BASS_Free: BOOL;

procedure MusicButtonClick(Sender: TObject);
begin
  case BASS_ChannelIsActive(SoundStream) of
    BASS_ACTIVE_PLAYING:
    begin
      if BASS_Pause then
        MusicButton.Caption := ExpandConstant('{cm:MusicButtonCaptionSoundOn}');
    end;
    BASS_ACTIVE_PAUSED:
    begin
      if BASS_Start then
        MusicButton.Caption := ExpandConstant('{cm:MusicButtonCaptionSoundOff}');
    end;
  end;
end;

ExtractTemporaryFile('{#MusicFile}');
if BASS_Init(-1,44100,0) then
begin
  SoundStream := BASS_StreamCreateFile(False,ExpandConstant('{tmp}\{#MusicFile}'),EncodingFlag or BASS_SAMPLE_LOOP);
  BASS_SetConfig(BASS_CONfig_GVOL_STREAM,2500);
  BASS_ChannelPlay(SoundStream,False);
end;

我只想在安装程序的页面（在此情况下为许可页面）中播放声音我希望当用户进入许可页面，正常音乐停止和其他声音开始播放时，在完成此声音音乐后开始再次播放还能禁用下一步按钮，直到声音结束？

谢谢

在Martin Prikryl的帮助下，我对代码进行了一些编辑。我的代码现在是这样的（再次，由于行很多，我无法将完整的代码发布在上面）

procedure InitializeWizard();
var
  SoundStream: HSTREAM;
  LicenseSoundStream: HSTREAM;
  //-some other code-//
  IniFile := ExpandConstant('{tmp}\Settings.ini');
  #if Music == "1"
  if BASS_Init(-1,0) then
    begin
      BASS_SetConfig(BASS_CONfig_GVOL_STREAM,2500);
      ExtractTemporaryFile('{#MusicFile}');
      ExtractTemporaryFile('lic.mp3');
      SoundStream :=
        BASS_StreamCreateFile(
          False,BASS_UNICODE or BASS_SAMPLE_LOOP);
      LicenseSoundStream :=
        BASS_StreamCreateFile(
      False,ExpandConstant('{tmp}\lic.mp3'),BASS_UNICODE);
      BASS_ChannelPlay(SoundStream,False);
    end;
  #endif

procedure CurPageChanged(CurPageID: integer);
begin
  //-some other code-//
  #if UseLicense == "1"
  if CurPageID = wpLicense then
  begin
    AboutButton.Hide;
    WizardForm.DirEdit.Hide;
    WizardForm.DirbrowseButton.Hide;
    WizardForm.GroupEdit.Hide;
    WizardForm.GroupbrowseButton.Hide;
    WizardForm.PageNameLabel.Hide;
    WizardForm.PageDescriptionLabel.Hide;
    WizardForm.UserInfoNameLabel.Hide;
    WizardForm.UserInfoNameEdit.Hide;
    if Assigned(LicenseSoundStream) then
    begin
      BASS_ChannelPlay(LicenseSoundStream,True);
      BASS_Start;
    end;
  end
    else
  begin
    { On other pages,restore the standard music }
    if Assigned(SoundStream) then
    begin
      BASS_ChannelPlay(SoundStream,False);
    end;
  end;
  #endif
end;

它现在给我if Assigned(LicenseSoundStream)中的编译器错误，错误是Line 4416: Column 17: UnkNown identifier 'LicenseSoundStream'

-编辑2-

您知道我的安装程序中有2种声音

是背景音乐（除了许可证页面外，它在整个安装程序页面中播放）
是许可页面声音（当用户在许可页面之间的背景声音暂停并播放其他声音时，当退出其他声音时又开始播放）

im添加按钮可使用此代码禁用和启用背景音

procedure MusicButtonClick(Sender: TObject);
begin
  case BASS_ChannelIsActive(SoundStream) of
    BASS_ACTIVE_PLAYING:
    begin
      if BASS_Pause then
        MusicButton.Caption := ExpandConstant('{cm:MusicButtonCaptionSoundOn}');
    end;
    BASS_ACTIVE_PAUSED:
    begin
      if BASS_Start then
        MusicButton.Caption := ExpandConstant('{cm:MusicButtonCaptionSoundOff}');
    end;
  end;
end;

但是我的问题是，如果用户在许可间页面之前暂停背景声音，则许可页面内的背景声音会再次播放（而不是其他声音）

解决方法

假设您的ExtractTemporaryFile和BASS_Init通话在InitializeSetup中，如下所示：How to make Stop and Pause/Resume/Play music buttons in Inno Setup

更新代码以加载两个音乐文件：

var
  SoundStream: HSTREAM;
  LicenseSoundStream: HSTREAM;

procedure InitializeWizard;
begin
  if BASS_Init(-1,44100,0) then
  begin
    BASS_SetConfig(BASS_CONFIG_GVOL_STREAM,2500);
    ExtractTemporaryFile('{#MusicFile}');
    ExtractTemporaryFile('{#LicenseMusicFile}');
    SoundStream :=
      BASS_StreamCreateFile(
        False,ExpandConstant('{tmp}\{#MusicFile}'),BASS_UNICODE or BASS_SAMPLE_LOOP);
    LicenseSoundStream :=
      BASS_StreamCreateFile(
        False,ExpandConstant('{tmp}\{#LicenseMusicFile}'),BASS_UNICODE);
    BASS_ChannelPlay(SoundStream,False);
  end;
end;

然后在许可页面上的CurPageChanged event function中，开始“许可”音乐：

procedure CurPageChanged(CurPageID: Integer);
begin
  if CurPageID = wpLicense then
  begin
    if LicenseSoundStream <> 0 then
    begin
      BASS_ChannelPause(SoundStream);
      BASS_ChannelPlay(LicenseSoundStream,True);
      BASS_Start;
    end;
  end
    else
  begin
    { On other pages,restore the standard music }
    if SoundStream <> 0 then
    begin
      BASS_ChannelPause(LicenseSoundStream);
      BASS_ChannelPlay(SoundStream,False);
    end;
  end;
end;

未经测试-可能需要进行一些调整。

inno-setup pascalscript