How to make Stop and Pause/Resume/Play music buttons in Inno Setup

Question

I want to create two buttons adjacent to each-other at the bottom left corner of all the pages like reloaded.

The first button shows the Pause and the Resume command (if I click Pause, the button will switch to Resume automatically).

The other button shows the Stop command (if I click Stop, the next button will switch to Play from start automatically)

This code just adds Pause/Resume/Play from start* button and Stop button

The problem is: If I press Stop button, the music stops permanently and the Play form start button never appears.

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

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


[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_Stop(): Boolean;
  external 'BASS_Stop@files:BASS.dll stdcall delayload';
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;
  PauseResumePlayButton: TNewButton;
  StopButton: TNewButton;

procedure ResumeButtonClick(Sender: TObject); forward;

procedure PauseButtonClick(Sender: TObject);
begin
  if BASS_Pause then
  begin
    PauseResumePlayButton.Caption := 'Resume';
    PauseResumePlayButton.OnClick := @ResumeButtonClick;
  end;
end;

procedure ResumeButtonClick(Sender: TObject);
begin
  if BASS_start then
  begin
    PauseResumePlayButton.Caption := 'Pause';
    PauseResumePlayButton.OnClick := @PauseButtonClick;
  end;
end;

procedure PlayButtonClick(Sender: TObject);
begin
  if BASS_Start then
  begin
    PauseResumePlayButton.Caption := 'Pause';
    PauseResumePlayButton.OnClick := @PauseButtonClick;
  end;
end;


procedure StopButtonClick(Sender: TObject);
begin
  if BASS_Stop then
  begin
    PauseResumePlayButton.Caption := 'Play';
    PauseResumePlayButton.OnClick := @PlayButtonClick;
  end;
       begin
       BASS_Free;
       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);

    StopButton := TNewButton.Create(WizardForm);
    StopButton.Parent := WizardForm;
    StopButton.Left :=
      WizardForm.ClientWidth -
      WizardForm.CancelButton.Left - WizardForm.CancelButton.Width;
    StopButton.Top := WizardForm.CancelButton.Top;
    StopButton.Width :=  WizardForm.CancelButton.Width;
    StopButton.Height := WizardForm.CancelButton.Height;
    StopButton.Caption := 'Stop';
    StopButton.OnClick := @StopButtonClick;

    PauseResumePlayButton := TNewButton.Create(WizardForm);
    PauseResumePlayButton.Parent := WizardForm;
    PauseResumePlayButton.Left :=
      WizardForm.ClientWidth -
      WizardForm.NextButton.Left - WizardForm.NextButton.Width;
    PauseResumePlayButton.Top := WizardForm.CancelButton.Top;
    PauseResumePlayButton.Width :=  WizardForm.CancelButton.Width;
    PauseResumePlayButton.Height := WizardForm.CancelButton.Height;
    PauseResumePlayButton.Caption := 'Pause';
    PauseResumePlayButton.OnClick := @PauseButtonClick;
  end;
end;

procedure DeinitializeSetup;
begin
  BASS_Free;
end;

You cannot ask a specific user who has not participated in the thread to help. Be patient, and someone will help you when they can. If you can't wait, hire a contractor and pay them to figure it out for you. (It's always unclear to me why people want to play music from an installer - it's job is to **install software**, not to be a home entertainment center. You're introducing a dependency on Bass.DLL to be installed before your software, you're making the download much larger (wasting bandwidth), and making the install much slower, not even counting the extra work you're doing now.) — Ken White, Sep 08 '16 at 22:21
the Bass.DLL is just a 33.5kb, not that much space. and the download is indeed large so a few kilobytes additial to the gigantic files won't hurt. the install would take at least 15 minutes to be installed, so it would be a good idea to play music during install — Muhammad Gibriel, Sep 08 '16 at 22:35
It also has to be installed first, and you have to include all of the sound files as well. You can play music by including a couple of small .wav files and play them using the Windows MMAPI without requiring an install. Users don't need to pause, rewind, start and stop sounds during an install - that turns your installer into a media player. You're doing the equivalent of creating paint to put on things as you throw them in the garbage - they won't be around but a few minutes, but boy will they be pretty while they last! Use your installer to install. — Ken White, Sep 09 '16 at 01:22

Martin Prikryl · Accepted Answer · 2020-09-06T12:00:30.157

It's not a good idea to implement this using a single OnClick handler.

Change the OnClick handler on the fly, as needed, for more straightforward 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): Boolean;
  external 'BASS_Init@files:bass.dll stdcall';
function BASS_StreamCreateFile(mem: Boolean; f: string; offset1: DWORD;
  offset2: DWORD; length1: DWORD; length2: DWORD; flags: DWORD): HSTREAM;
  external 'BASS_StreamCreateFile@files:bass.dll stdcall';
function BASS_ChannelPlay(handle: DWORD; restart: Boolean): Boolean;
  external 'BASS_ChannelPlay@files:bass.dll stdcall';
function BASS_ChannelPause(handle: DWORD): Boolean;
  external 'BASS_ChannelPause@files:bass.dll stdcall';
function BASS_SetConfig(option: DWORD; value: DWORD ): Boolean;
  external 'BASS_SetConfig@files:bass.dll stdcall';
function BASS_ChannelIsActive(handle: DWORD): DWORD;
  external 'BASS_ChannelIsActive@files:bass.dll stdcall';

var
  SoundStream: HSTREAM;
  PauseResumePlayButton: TNewButton;
  StopButton: TNewButton;

procedure ResumeButtonClick(Sender: TObject); forward;

procedure PauseButtonClick(Sender: TObject);
begin
  if BASS_ChannelPause(SoundStream) then
  begin
    PauseResumePlayButton.Caption := 'Resume';
    PauseResumePlayButton.OnClick := @ResumeButtonClick;
  end;
end;  

procedure ResumeButtonClick(Sender: TObject);
begin
  if BASS_ChannelPlay(SoundStream, False) then
  begin
    PauseResumePlayButton.Caption := 'Pause';
    PauseResumePlayButton.OnClick := @PauseButtonClick;
  end;
end;  

procedure PlayButtonClick(Sender: TObject);
begin
  if BASS_ChannelPlay(SoundStream, True) then
  begin
    PauseResumePlayButton.Caption := 'Pause';
    PauseResumePlayButton.OnClick := @PauseButtonClick;
  end;
end;  

procedure StopButtonClick(Sender: TObject);
begin
  if (BASS_ChannelIsActive(SoundStream) = BASS_ACTIVE_PAUSED) or
     BASS_ChannelPause(SoundStream) then
  begin
    PauseResumePlayButton.Caption := 'Play';
    PauseResumePlayButton.OnClick := @PlayButtonClick;
  end;
end;  

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

    if SoundStream <> 0 then
    begin
      BASS_SetConfig(BASS_CONFIG_GVOL_STREAM, 2500);

      if BASS_ChannelPlay(SoundStream, False) then
      begin
        StopButton := TNewButton.Create(WizardForm);
        StopButton.Parent := WizardForm;
        StopButton.Left :=
          WizardForm.ClientWidth -
          WizardForm.CancelButton.Left -  WizardForm.CancelButton.Width;
        StopButton.Top := WizardForm.CancelButton.Top;
        StopButton.Width :=  WizardForm.CancelButton.Width;
        StopButton.Height := WizardForm.CancelButton.Height;
        StopButton.Caption := 'Stop';
        StopButton.OnClick := @StopButtonClick;

        PauseResumePlayButton := TNewButton.Create(WizardForm);
        PauseResumePlayButton.Parent := WizardForm;
        PauseResumePlayButton.Left :=
          WizardForm.ClientWidth -
          WizardForm.NextButton.Left -  WizardForm.NextButton.Width;
        PauseResumePlayButton.Top := WizardForm.CancelButton.Top;
        PauseResumePlayButton.Width :=  WizardForm.CancelButton.Width;
        PauseResumePlayButton.Height := WizardForm.CancelButton.Height;
        PauseResumePlayButton.Caption := 'Pause';
        PauseResumePlayButton.OnClick := @PauseButtonClick;
      end;
    end;
  end;
end;

Note that you called the BASS_StreamCreateFile, BASS_SetConfig and BASS_ChannelPlay twice with the same arguments. It does not make sense. I've removed the second set.
I've also tweaked placement of the buttons.

the ResumeButtonClick is not the problem it's StopButtonClick if i click stop button, the music stops and then runs instantly whiteout clicking on the play button **see my updated code** — Muhammad Gibriel, Sep 13 '16 at 17:57
Well, becase your `StopButtonClick` does not do what my answer shows. You call `BASS_Play`, so you cannot be surprised that your stop button starts playing. — Martin Prikryl, Sep 13 '16 at 18:00
so how to change that? **what i want to do is this: if i click stop button, the music won't play unless i click play button** help please — Muhammad Gibriel, Sep 13 '16 at 18:14
no. if i click play after i click stop , the song won't start form the beginning compare my updated code with yours and you will see that the pause/resume is not working properly, and the stop button wont't start the song after i click play button — Muhammad Gibriel, Sep 13 '16 at 18:48
can you compile the code, and you will understand what i mean? — Muhammad Gibriel, Sep 13 '16 at 19:39
OK, I now understand what you mean, before you used your wrong code, but now you refer to my code. See my updated answer. — Martin Prikryl, Sep 14 '16 at 06:24

score 0 · Answer 2 · answered Jan 06 '20 at 10:25

function BASS_ChannelPlay(handle: DWORD; restart: Boolean): Boolean;
  external 'BASS_ChannelPlay@files:bass.dll stdcall';
function BASS_ChannelPause(handle: DWORD): Boolean;
  external 'BASS_ChannelPause@files:bass.dll stdcall';
function BASS_ChannelIsActive(handle: DWORD): DWORD;
  external 'BASS_ChannelIsActive@files:bass.dll stdcall';

procedure MusicButtonOnClick(Sender: TObject);
begin
  if (BASS_ChannelIsActive(SoundStream) = 3)
 then
  BASS_ChannelPlay(SoundStream, False)
 else
  BASS_ChannelPause(SoundStream) 
end;

and on the button.OnClick add like this :

  YourButtonName.OnClick := @MusicButtonOnClick;

How to make Stop and Pause/Resume/Play music buttons in Inno Setup

2 Answers2

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