Play a sound only in a specific page in Inno Setup - inno-setup

Question

I'm creating a installer for my application with Inno Setup. I use BASS audio library to play music in background of the installer.
Here is my code for playing the sound.
[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, 0, 0) then
begin
SoundStream := BASS_StreamCreateFile(False,
ExpandConstant('{tmp}\{#MusicFile}'), 0, 0, 0, 0,
EncodingFlag or BASS_SAMPLE_LOOP);
BASS_SetConfig(BASS_CONFIG_GVOL_STREAM, 2500);
BASS_ChannelPlay(SoundStream, False);
end;
i want to play a sound only in a page of my installer (in this case licence page)
i want when the user come in license page, normal music stop and other sound start play,after finish this sound music start play again
and also there is anyway to disable next button until sound end?
thanks
With Martin Prikryl's help, I've edited my code a little. My code now like this (again I can't put full code on post because it has many lines)
procedure InitializeWizard();
var
SoundStream: HSTREAM;
LicenseSoundStream: HSTREAM;
//-some other code-//
IniFile := ExpandConstant('{tmp}\Settings.ini');
#if Music == "1"
if BASS_Init(-1, 44100, 0, 0, 0) then
begin
BASS_SetConfig(BASS_CONFIG_GVOL_STREAM, 2500);
ExtractTemporaryFile('{#MusicFile}');
ExtractTemporaryFile('lic.mp3');
SoundStream :=
BASS_StreamCreateFile(
False, ExpandConstant('{tmp}\{#MusicFile}'), 0, 0, 0, 0,
BASS_UNICODE or BASS_SAMPLE_LOOP);
LicenseSoundStream :=
BASS_StreamCreateFile(
False, ExpandConstant('{tmp}\lic.mp3'), 0, 0, 0, 0, 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;
its now give me compiler error in if Assigned(LicenseSoundStream), error is Line 4416: Column 17: Unknown identifier 'LicenseSoundStream'
-edit 2-
as you know i have 2 sound in installer
is background music (its play in whole installer page except license page)
is license page sound (when user inter license page background sound pause and other sound play, and when exit other sound start play again)
im add button to disable and enable background sound with this codes
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;
but my problem is if user pause background sound before inter license page, inside license page background sound play again (instead of other sound)

Answer 1

Assuming your ExtractTemporaryFile and BASS_Init calls are in InitializeSetup like here: How to make Stop and Pause/Resume/Play music buttons in Inno Setup
Update the code to load both music files:
var
SoundStream: HSTREAM;
LicenseSoundStream: HSTREAM;
procedure InitializeWizard;
begin
if BASS_Init(-1, 44100, 0, 0, 0) then
begin
BASS_SetConfig(BASS_CONFIG_GVOL_STREAM, 2500);
ExtractTemporaryFile('{#MusicFile}');
ExtractTemporaryFile('{#LicenseMusicFile}');
SoundStream :=
BASS_StreamCreateFile(
False, ExpandConstant('{tmp}\{#MusicFile}'), 0, 0, 0, 0,
BASS_UNICODE or BASS_SAMPLE_LOOP);
LicenseSoundStream :=
BASS_StreamCreateFile(
False, ExpandConstant('{tmp}\{#LicenseMusicFile}'), 0, 0, 0, 0, BASS_UNICODE);
BASS_ChannelPlay(SoundStream, False);
end;
end;
Then in CurPageChanged event function on the license page, start the "license" music:
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;
Untested – may need few tweaks.