(*

 * Hedgewars, a free turn based strategy game

 * Copyright (c) 2005, 2007, 2009 Andrey Korotaev <unC0Rr@gmail.com>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; version 2 of the License

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA

 *)

unit uSound;

interface

uses SDLh, uConsts;

{$INCLUDE options.inc}

type PVoicepack = ^TVoicepack;

	TVoicepack = record

		name: shortstring;

		chunks: array [TSound] of PMixChunk;

		end;

procedure InitSound;

procedure ReleaseSound;

procedure SoundLoad;

procedure PlaySound(snd: TSound; infinite: boolean);

procedure PlayMusic;

procedure StopSound(snd: TSound);

function  ChangeVolume(voldelta: LongInt): LongInt;

function  AskForVoicepack(name: shortstring): Pointer;

var MusicFN: shortstring = '';

implementation

uses uMisc, uConsole;

const chanTPU = 12;

var Mus: PMixMusic = nil;

	Volume: LongInt;

	lastChan: array [TSound] of LongInt;

	voicepacks: array[0..cMaxTeams] of TVoicepack;

function  AskForVoicepack(name: shortstring): Pointer;

var i: Longword;

begin

i:= 0;

while (voicepacks[i].name <> name) and (voicepacks[i].name <> '') do

	begin

	inc(i);

	TryDo(i <= cMaxTeams, 'Engine bug: AskForVoicepack i > cMaxTeams', true)

	end;

voicepacks[i].name:= name;

AskForVoicepack:= @voicepacks[i]

end;

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));

if isMusicEnabled then Mix_VolumeMusic(50);

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: shortstring;

begin

if not isSoundEnabled then exit;

AskForVoicepack('Default');

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(Str2PChar(s), 'rb'), 1);

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

	WriteLnToConsole(msgOK);

	end;

end;

procedure PlaySound(snd: TSound; infinite: boolean);

var loops: LongInt;

begin

if (not isSoundEnabled) or fastUntilLag then exit;

if infinite then loops:= -1 else loops:= 0;

lastChan[snd]:= Mix_PlayChannelTimed(-1, Soundz[snd].id, loops, -1)

end;

procedure StopSound(snd: TSound);

begin

if not isSoundEnabled then exit;

if Mix_Playing(lastChan[snd]) <> 0 then

	Mix_HaltChannel(lastChan[snd])

end;

procedure PlayMusic;

var s: string;

begin

if (not isSoundEnabled)

	or (MusicFN = '')

	or (not isMusicEnabled)then exit;

s:= PathPrefix + '/Music/' + MusicFN;

WriteToConsole(msgLoading + s + ' ');

Mus:= Mix_LoadMUS(Str2PChar(s));

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

WriteLnToConsole(msgOK);

SDLTry(Mix_FadeInMusic(Mus, -1, 3000) <> -1, false)

end;

function ChangeVolume(voldelta: LongInt): LongInt;

begin

if not isSoundEnabled then

	exit(0);

inc(Volume, voldelta);

if Volume < 0 then Volume:= 0;

Mix_Volume(-1, Volume);

Volume:= Mix_Volume(-1, -1);

if isMusicEnabled then Mix_VolumeMusic(Volume * 4 div 8);

ChangeVolume:= Volume * 100 div MIX_MAX_VOLUME

end;

end.