hedgewars/uSound.pas
author unc0rr
Wed, 27 Sep 2006 20:52:22 +0000
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child 181 7dfffbf0c7f6
permissions -rw-r--r--
- Some improvements to volume control - Simplified captions
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(*
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 * Hedgewars, a worms-like game
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 * Copyright (c) 2005 Andrey Korotaev <unC0Rr@gmail.com>
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 *
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 * Distributed under the terms of the BSD-modified licence:
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 *
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 * Permission is hereby granted, free of charge, to any person obtaining a copy
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 * of this software and associated documentation files (the "Software"), to deal
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 * with the Software without restriction, including without limitation the
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 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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 * sell copies of the Software, and to permit persons to whom the Software is
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 * furnished to do so, subject to the following conditions:
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 *
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 * 1. Redistributions of source code must retain the above copyright notice,
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 *    this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright notice,
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 *    this list of conditions and the following disclaimer in the documentation
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 *    and/or other materials provided with the distribution.
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 * 3. The name of the author may not be used to endorse or promote products
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 *    derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 *)
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unit uSound;
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interface
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uses SDLh, uConsts;
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{$INCLUDE options.inc}
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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);
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procedure PlayMusic;
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procedure StopTPUSound;
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function  ChangeVolume(voldelta: integer): integer;
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implementation
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uses uMisc, uConsole;
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const chanTPU = 12;
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var Mus: PMixMusic;
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    Volume: integer;
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procedure InitSound;
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begin
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if not isSoundEnabled then exit;
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WriteToConsole('Init sound...');
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isSoundEnabled:= SDL_Init(SDL_INIT_AUDIO) >= 0;
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if isSoundEnabled then
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   isSoundEnabled:= Mix_OpenAudio(22050, $8010, 2, 512) = 0;
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if isSoundEnabled then WriteLnToConsole(msgOK)
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                  else WriteLnToConsole(msgFailed);
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Mix_AllocateChannels(Succ(chanTPU));
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Mix_VolumeMusic(48);
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Volume:= cInitVolume;
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if Volume < 0 then Volume:= 0;
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Volume:= Mix_Volume(-1, Volume)
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end;
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procedure ReleaseSound;
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var i: TSound;
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begin
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for i:= Low(TSound) to High(TSound) do
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    Mix_FreeChunk(Soundz[i].id);
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Mix_FreeMusic(Mus);
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Mix_CloseAudio
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end;
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procedure SoundLoad;
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var i: TSound;
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    s: string;
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begin
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if not isSoundEnabled then exit;
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for i:= Low(TSound) to High(TSound) do
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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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    Soundz[i].id:= Mix_LoadWAV_RW(SDL_RWFromFile(PChar(s), 'rb'), 1);
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    TryDo(Soundz[i].id <> nil, msgFailed, true);
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    WriteLnToConsole(msgOK);
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    end;
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s:= PathPrefix + 'Data/Music/kahvi140a_alexander_chereshnev-illusion.ogg';
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WriteToConsole(msgLoading + s + ' ');
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Mus:= Mix_LoadMUS(PChar(s));
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TryDo(Mus <> nil, msgFailed, false);
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WriteLnToConsole(msgOK)
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end;
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procedure PlaySound(snd: TSound);
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begin
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if not isSoundEnabled then exit;
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if snd <> sndThrowPowerUp then Mix_PlayChannelTimed(-1, Soundz[snd].id, 0, -1)
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                          else Mix_PlayChannelTimed(chanTPU, Soundz[snd].id, 0, -1)
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end;
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procedure StopTPUSound;
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begin
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if not isSoundEnabled then exit;
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if Mix_Playing(chanTPU) <> 0 then
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   Mix_HaltChannel(chanTPU)
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end;
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procedure PlayMusic;
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begin
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if not isSoundEnabled then exit;
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if Mix_PlayingMusic = 0 then
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   Mix_PlayMusic(Mus, -1)
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end;
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function ChangeVolume(voldelta: integer): integer;
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begin
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inc(Volume, voldelta);
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if Volume < 0 then Volume:= 0;
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Mix_Volume(-1, Volume);
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Volume:= Mix_Volume(-1, -1);
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Mix_VolumeMusic(Volume * 3 div 8);
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Result:= Volume * 100 div MIX_MAX_VOLUME
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end;
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end.