低音音频库ON/OFF按钮

Question

我怎么能在这个例子中创建的开/关按钮音乐：

Playing sound during an Inno Setup install

我想用一个image.png。

Answer 1

下面的脚本，使一个按钮，通过它可以根据其当前状态播放或暂停流：

[Setup] 
AppName=Bass Audio Project 
AppVersion=1.0 
DefaultDirName={pf}\Bass Audio Project 

[Files] 
Source: "Bass.dll"; Flags: dontcopy 
Source: "AudioFile.mp3"; Flags: dontcopy 

[CustomMessages] 
SoundCtrlButtonCaptionSoundOn=Music on 
SoundCtrlButtonCaptionSoundOff=Music off 

[Code] 
const 
    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 = 5; 
const 
    #ifndef UNICODE 
    EncodingFlag = 0; 
    #else 
    EncodingFlag = BASS_UNICODE; 
    #endif 
type 
    HSTREAM = DWORD; 

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; 
    external 'BASS_Free@files:bass.dll stdcall'; 

var 
    SoundStream: HSTREAM; 
    SoundCtrlButton: TNewButton; 

procedure SoundCtrlButtonClick(Sender: TObject); 
begin 
    case BASS_ChannelIsActive(SoundStream) of 
    BASS_ACTIVE_PLAYING: 
    begin 
     if BASS_Pause then 
     SoundCtrlButton.Caption := 
      ExpandConstant('{cm:SoundCtrlButtonCaptionSoundOn}'); 
    end; 
    BASS_ACTIVE_PAUSED: 
    begin 
     if BASS_Start then 
     SoundCtrlButton.Caption := 
      ExpandConstant('{cm:SoundCtrlButtonCaptionSoundOff}'); 
    end; 
    end; 
end; 

procedure InitializeWizard; 
begin 
    ExtractTemporaryFile('AudioFile.mp3'); 
    if BASS_Init(-1, 44100, 0, 0, 0) then 
    begin 
    SoundStream := BASS_StreamCreateFile(False, 
     ExpandConstant('{tmp}\AudioFile.mp3'), 0, 0, 0, 0, 
     EncodingFlag or BASS_SAMPLE_LOOP); 
    BASS_SetConfig(BASS_CONFIG_GVOL_STREAM, 2500); 
    BASS_ChannelPlay(SoundStream, False); 

    SoundCtrlButton := TNewButton.Create(WizardForm); 
    SoundCtrlButton.Parent := WizardForm; 
    SoundCtrlButton.Left := 8; 
    SoundCtrlButton.Top := WizardForm.ClientHeight - 
     SoundCtrlButton.Height - 8; 
    SoundCtrlButton.Width := 155; 
    SoundCtrlButton.Caption := 
     ExpandConstant('{cm:SoundCtrlButtonCaptionSoundOff}'); 
    SoundCtrlButton.OnClick := @SoundCtrlButtonClick; 
    end; 
end; 

procedure DeinitializeSetup; 
begin 
    BASS_Free; 
end;