(*

 * Hedgewars, a worms-like game

 * Copyright (c) 2005 Andrey Korotaev <unC0Rr@gmail.com>

 *

 * Distributed under the terms of the BSD-modified licence:

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to deal

 * with the Software without restriction, including without limitation the

 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or

 * sell copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * 1. Redistributions of source code must retain the above copyright notice,

 *    this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright notice,

 *    this list of conditions and the following disclaimer in the documentation

 *    and/or other materials provided with the distribution.

 * 3. The name of the author may not be used to endorse or promote products

 *    derived from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED

 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF

 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO

 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;

 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,

 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR

 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF

 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 *)

unit uSound;

interface

uses SDLh, uConsts;

{$INCLUDE options.inc}

procedure InitSound;

procedure ReleaseSound;

procedure SoundLoad;

procedure PlaySound(snd: TSound);

procedure PlayMusic;

procedure StopTPUSound;

function  ChangeVolume(voldelta: integer): integer;

implementation

uses uMisc, uConsole;

const chanTPU = 12;

var Mus: PMixMusic;

    Volume: integer;

procedure InitSound;

begin

if not isSoundEnabled then exit;

WriteToConsole('Init sound...');

isSoundEnabled:= SDL_Init(SDL_INIT_AUDIO) >= 0;

if isSoundEnabled then

   isSoundEnabled:= Mix_OpenAudio(22050, $8010, 2, 512) = 0;

if isSoundEnabled then WriteLnToConsole(msgOK)

                  else WriteLnToConsole(msgFailed);

Mix_AllocateChannels(Succ(chanTPU));

Mix_VolumeMusic(48);

Volume:= cInitVolume;

if Volume < 0 then Volume:= 0;

Volume:= Mix_Volume(-1, Volume)

end;

procedure ReleaseSound;

var i: TSound;

begin

for i:= Low(TSound) to High(TSound) do

    Mix_FreeChunk(Soundz[i].id);

Mix_FreeMusic(Mus);

Mix_CloseAudio

end;

procedure SoundLoad;

var i: TSound;

    s: string;

begin

if not isSoundEnabled then exit;

for i:= Low(TSound) to High(TSound) do

    begin

    s:= Pathz[Soundz[i].Path] + '/' + Soundz[i].FileName;

    WriteToConsole(msgLoading + s + ' ');

    Soundz[i].id:= Mix_LoadWAV_RW(SDL_RWFromFile(PChar(s), 'rb'), 1);

    TryDo(Soundz[i].id <> nil, msgFailed, true);

    WriteLnToConsole(msgOK);

    end;

s:= PathPrefix + 'Data/Music/kahvi140a_alexander_chereshnev-illusion.ogg';

WriteToConsole(msgLoading + s + ' ');

Mus:= Mix_LoadMUS(PChar(s));

TryDo(Mus <> nil, msgFailed, false);

WriteLnToConsole(msgOK)

end;

procedure PlaySound(snd: TSound);

begin

if not isSoundEnabled then exit;

if snd <> sndThrowPowerUp then Mix_PlayChannelTimed(-1, Soundz[snd].id, 0, -1)

                          else Mix_PlayChannelTimed(chanTPU, Soundz[snd].id, 0, -1)

end;

procedure StopTPUSound;

begin

if not isSoundEnabled then exit;

if Mix_Playing(chanTPU) <> 0 then

   Mix_HaltChannel(chanTPU)

end;

procedure PlayMusic;

begin

if not isSoundEnabled then exit;

if Mix_PlayingMusic = 0 then

   Mix_PlayMusic(Mus, -1)

end;

function ChangeVolume(voldelta: integer): integer;

begin

inc(Volume, voldelta);

if Volume < 0 then Volume:= 0;

Result:= Volume * 100 div MIX_MAX_VOLUME

end;

end.