hedgewars/uSound.pas
author unc0rr
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(*
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 * Hedgewars, a free turn based strategy game
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 * Copyright (c) 2005, 2007, 2009 Andrey Korotaev <unC0Rr@gmail.com>
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; version 2 of the License
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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 *)
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unit uSound;
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interface
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{$IFDEF DARWIN}
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	{$linklib openalbridge}
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	{$linkframework OpenAL}
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	{$linkframework Ogg}
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	{$linkframework Vorbis}
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{$ELSE}
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{$IFNDEF WIN32}
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    {$linklib openal}
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    {$linklib ogg}
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    {$linklib vorbis}
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    {$linklib vorbisfile}
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{$ENDIF}
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{$ENDIF}
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uses uConsts;
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{$INCLUDE options.inc}
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type PVoicepack = ^TVoicepack;
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	TVoicepack = record
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		name: shortstring;
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		chunks: array [TSound] of LongInt;
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		end;
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const OpenALBridge = 'libopenalbridge';
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procedure InitSound;
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procedure ReleaseSound;
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procedure SoundLoad;
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procedure PlaySound(snd: TSound; infinite: boolean; voicepack: PVoicepack);
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procedure PlayMusic;
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procedure PauseMusic;
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procedure ResumeMusic;
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procedure StopSound(snd: TSound);
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function  ChangeVolume(voldelta: LongInt): LongInt;
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function  AskForVoicepack(name: shortstring): Pointer;
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function  soundFadeOut(snd: TSound; qt: LongInt; voicepack: PVoicepack): LongInt;
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{*remember: LongInt = 32bit; integer = 16bit; byte = 8bit*}
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function openal_init		(memsize: LongInt)                      : boolean; cdecl; external OpenALBridge;
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function openal_close							: boolean; cdecl; external OpenALBridge;
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function openal_loadfile	(const filename: PChar)			: LongInt; cdecl; external OpenALBridge;
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function openal_toggleloop	(index: LongInt)			: boolean; cdecl; external OpenALBridge;
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function openal_setvolume	(index: LongInt; percentage: byte)	: boolean; cdecl; external OpenALBridge;
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function openal_setglobalvolume	(percentage: byte)			: boolean; cdecl; external OpenALBridge;
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function openal_fadeout		(index: LongInt; quantity: integer)	: boolean; cdecl; external OpenALBridge;
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function openal_fadein		(index: LongInt; quantity: integer)	: boolean; cdecl; external OpenALBridge;
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function openal_fade		(index: LongInt; quantity: integer; direction: boolean)	: boolean; cdecl; external OpenALBridge;
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function openal_playsound	(index: LongInt)			: boolean; cdecl; external OpenALBridge;
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function openal_pausesound	(index: LongInt)			: boolean; cdecl; external OpenALBridge;
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function openal_stopsound	(index: LongInt)			: boolean; cdecl; external OpenALBridge;
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var MusicFN: shortstring = '';
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implementation
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uses uMisc, uConsole;
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const chanTPU = 12;
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var	lastChan: array [TSound] of LongInt;
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	voicepacks: array[0..cMaxTeams] of TVoicepack;
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	defVoicepack: PVoicepack;
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	Mus: LongInt = 0;
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function  AskForVoicepack(name: shortstring): Pointer;
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var i: Longword;
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begin
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i:= 0;
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while (voicepacks[i].name <> name) and (voicepacks[i].name <> '') do
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	begin
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	inc(i);
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	TryDo(i <= cMaxTeams, 'Engine bug: AskForVoicepack i > cMaxTeams', true)
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	end;
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voicepacks[i].name:= name;
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AskForVoicepack:= @voicepacks[i]
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end;
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procedure InitSound;
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const numSounds = 80;
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begin
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if not isSoundEnabled then exit;
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WriteToConsole('Init OpenAL sound...');
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isSoundEnabled:= openal_init(numSounds);
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if isSoundEnabled then WriteLnToConsole(msgOK)
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                  else WriteLnToConsole(msgFailed);
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end;
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procedure ReleaseSound;
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begin
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if isMusicEnabled then openal_fadeout(Mus, 30);
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openal_close();
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end;
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procedure SoundLoad;
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const volume = 60;
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var i: TSound;
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	s: shortstring;
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	t: Longword;
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begin
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if not isSoundEnabled then exit;
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defVoicepack:= AskForVoicepack('Default');
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for i:= Low(TSound) to High(TSound) do
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	if Soundz[i].Path <> ptVoices then
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		begin
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		s:= Pathz[Soundz[i].Path] + '/' + Soundz[i].FileName;
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		WriteToConsole(msgLoading + s + ' ');
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		defVoicepack^.chunks[i]:= openal_loadfile (Str2PChar(s));
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		openal_setvolume(defVoicepack^.chunks[i],volume);
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		TryDo(defVoicepack^.chunks[i] >= 0, msgFailed, true);
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		WriteLnToConsole(msgOK);
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		end;
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for t:= 0 to cMaxTeams do
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	if voicepacks[t].name <> '' then
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		for i:= Low(TSound) to High(TSound) do
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			if Soundz[i].Path = ptVoices then
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				begin
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				s:= Pathz[Soundz[i].Path] + '/' + voicepacks[t].name + '/' + Soundz[i].FileName;
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				WriteToConsole(msgLoading + s + ' ');
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				voicepacks[t].chunks[i]:= openal_loadfile (Str2PChar(s));
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				openal_setvolume(voicepacks[t].chunks[i],volume);
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				if voicepacks[t].chunks[i] < 0 then
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					WriteLnToConsole(msgFailed)
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				else
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					WriteLnToConsole(msgOK)
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				end;
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end;
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function soundFadeOut(snd: TSound; qt: LongInt; voicepack: PVoicepack): LongInt;
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begin
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if not isSoundEnabled then exit(0);
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if (voicepack <> nil) and (voicepack^.chunks[snd] >= 0) then openal_fadeout(defVoicepack^.chunks[snd], qt)
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else if (defVoicepack^.chunks[snd] >= 0) then openal_fadeout(defVoicepack^.chunks[snd], qt);
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end;
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procedure PlaySound(snd: TSound; infinite: boolean; voicepack: PVoicepack);
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begin
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if (not isSoundEnabled) or fastUntilLag then exit;
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if (voicepack <> nil) then
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begin
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if voicepack^.chunks[snd] >= 0 then
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	begin
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	if infinite then openal_toggleloop(voicepack^.chunks[snd]);
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	openal_playsound(voicepack^.chunks[snd]);
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	lastChan[snd]:=voicepack^.chunks[snd];
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	end
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end
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else
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begin
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if (defVoicepack^.chunks[snd] >= 0) then
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	begin
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	if infinite then openal_toggleloop(defVoicepack^.chunks[snd]);
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	openal_playsound(defVoicepack^.chunks[snd]);
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	lastChan[snd]:=defVoicepack^.chunks[snd];
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	end
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end
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end;
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procedure StopSound(snd: TSound);
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begin
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if not isSoundEnabled then exit;
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	openal_stopsound(lastChan[snd])
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end;
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procedure PlayMusic;
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var s: string;
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begin
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if (not isSoundEnabled)
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	or (MusicFN = '')
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	or (not isMusicEnabled) then exit;
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s:= PathPrefix + '/Music/' + MusicFN;
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WriteToConsole(msgLoading + s + ' ');
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Mus:= openal_loadfile(Str2PChar(s));
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TryDo(Mus >= 0, msgFailed, false);
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WriteLnToConsole(msgOK);
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openal_setvolume(Mus, 60);
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openal_fadein(Mus, 20);
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openal_toggleloop(Mus);
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end;
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function ChangeVolume(voldelta: LongInt): LongInt;
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begin
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if not isSoundEnabled then exit(0);
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openal_setglobalvolume(voldelta);
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end;
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procedure PauseMusic;
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begin
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if (MusicFN = '') or (not isMusicEnabled) then exit;
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openal_pausesound(Mus);
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end;
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procedure ResumeMusic;
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begin
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if (MusicFN = '') or (not isMusicEnabled) then exit;
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openal_playsound(Mus);
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end;
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var i: LongInt;
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	c: TSound;
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initialization
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for i:= 0 to cMaxTeams do
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	for c:= Low(TSound) to High(TSound) do
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		voicepacks[i].chunks[c]:= -1
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end.