(*

 * 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

 *)

{$INCLUDE "options.inc"}

unit uSound;

interface

uses SDLh, uConsts;

type PVoicepack = ^TVoicepack;

    TVoicepack = record

        name: shortstring;

        chunks: array [TSound] of PMixChunk;

        end;

var MusicFN: shortstring;

procedure initModule;

procedure freeModule;

procedure InitSound;

procedure ReleaseSound;

procedure SoundLoad;

procedure PlaySound(snd: TSound);

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

procedure PlaySound(snd: TSound; voicepack: PVoicepack);

procedure PlaySound(snd: TSound; voicepack: PVoicepack; keepPlaying: boolean);

function  LoopSound(snd: TSound): LongInt;

function  LoopSound(snd: TSound; voicepack: PVoicepack): LongInt;

procedure PlayMusic;

procedure PauseMusic;

procedure ResumeMusic;

procedure StopSound(snd: TSound);

procedure StopSound(chn: LongInt);

function  ChangeVolume(voldelta: LongInt): LongInt;

function  AskForVoicepack(name: shortstring): Pointer;

implementation

uses uMisc, uConsole;

const chanTPU = 32;

var Volume: LongInt;

    lastChan: array [TSound] of LongInt;

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

    defVoicepack: PVoicepack;

    Mus: PMixMusic = nil;

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;

var i: TSound;

begin

    if not isSoundEnabled then exit;

    WriteToConsole('Init sound...');

    isSoundEnabled:= SDL_InitSubSystem(SDL_INIT_AUDIO) >= 0;

    if isSoundEnabled then

        isSoundEnabled:= Mix_OpenAudio(44100, $8010, 2, 1024) = 0;

{$IFDEF SDL_MIXER_NEWER}

    WriteToConsole('Init SDL_mixer... ');

    SDLTry(Mix_Init(MIX_INIT_OGG) <> 0, true);

    WriteLnToConsole(msgOK);

{$ENDIF}

    if isSoundEnabled then

        WriteLnToConsole(msgOK)

    else

        WriteLnToConsole(msgFailed);

    Mix_AllocateChannels(Succ(chanTPU));

    if isMusicEnabled then

        Mix_VolumeMusic(50);

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

        lastChan[i]:= -1;

    Volume:= 0;

    ChangeVolume(cInitVolume)

end;

procedure ReleaseSound;

var i: TSound;

    t: Longword;

begin

    for t:= 0 to cMaxTeams do

        if voicepacks[t].name <> '' then

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

                if voicepacks[t].chunks[i] <> nil then

                    Mix_FreeChunk(voicepacks[t].chunks[i]);

    if Mus <> nil then

        Mix_FreeMusic(Mus);

{$IFDEF SDL_MIXER_NEWER}

    // make sure all instances of sdl_mixer are unloaded before continuing

    while Mix_Init(0) <> 0 do

        Mix_Quit();

{$ENDIF}    

    Mix_CloseAudio();

end;

procedure SoundLoad;

var i: TSound;

    s: shortstring;

    t: Longword;

begin

    if not isSoundEnabled then exit;

    defVoicepack:= AskForVoicepack('Default');

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

        if (Soundz[i].Path <> ptVoices) and (Soundz[i].FileName <> '') then

        begin

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

            WriteToConsole(msgLoading + s + ' ');

            defVoicepack^.chunks[i]:= Mix_LoadWAV_RW(SDL_RWFromFile(Str2PChar(s), 'rb'), 1);

            TryDo(defVoicepack^.chunks[i] <> nil, msgFailed, true);

            WriteLnToConsole(msgOK);

        end;

    for t:= 0 to cMaxTeams do

        if voicepacks[t].name <> '' then

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

                if (Soundz[i].Path = ptVoices) and (Soundz[i].FileName <> '') then

                begin

                    s:= Pathz[Soundz[i].Path] + '/' + voicepacks[t].name + '/' + Soundz[i].FileName;

                    WriteToConsole(msgLoading + s + ' ');

                    voicepacks[t].chunks[i]:= Mix_LoadWAV_RW(SDL_RWFromFile(Str2PChar(s), 'rb'), 1);

                    if voicepacks[t].chunks[i] = nil then

                        WriteLnToConsole(msgFailed)

                    else

                        WriteLnToConsole(msgOK)

                end;

end;

procedure PlaySound(snd: TSound);

begin

    PlaySound(snd, nil, false);

end;

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

begin

    PlaySound(snd, nil, keepPlaying);

end;

procedure PlaySound(snd: TSound; voicepack: PVoicepack);

begin

    PlaySound(snd, voicepack, false);

end;

procedure PlaySound(snd: TSound; voicepack: PVoicepack; keepPlaying: boolean);

begin

    if (not isSoundEnabled) or fastUntilLag then

        exit;

    if keepPlaying and (lastChan[snd] <> -1) and (Mix_Playing(lastChan[snd]) <> 0) then

        exit;

    if (voicepack <> nil) and (voicepack^.chunks[snd] <> nil) then

        lastChan[snd]:= Mix_PlayChannelTimed(-1, voicepack^.chunks[snd], 0, -1)

    else

        lastChan[snd]:= Mix_PlayChannelTimed(-1, defVoicepack^.chunks[snd], 0, -1)

end;

function LoopSound(snd: TSound): LongInt;

begin

    LoopSound:= LoopSound(snd, nil)

end;

function LoopSound(snd: TSound; voicepack: PVoicepack): LongInt;

begin

    if (not isSoundEnabled) or fastUntilLag then

    begin

        LoopSound:= -1;

        exit

    end;

    if (voicepack <> nil) and (voicepack^.chunks[snd] <> nil) then

        LoopSound:= Mix_PlayChannelTimed(-1, voicepack^.chunks[snd], -1, -1)

    else

        LoopSound:= Mix_PlayChannelTimed(-1, defVoicepack^.chunks[snd], -1, -1)

end;

procedure StopSound(snd: TSound);

begin

    if not isSoundEnabled then exit;

    if (lastChan[snd] <> -1) and (Mix_Playing(lastChan[snd]) <> 0) then

    begin

        Mix_HaltChannel(lastChan[snd]);

        lastChan[snd]:= -1;

    end;

end;

procedure StopSound(chn: LongInt);

begin

    if not isSoundEnabled then exit;

    if (chn <> -1) and (Mix_Playing(chn) <> 0) then

        Mix_HaltChannel(chn);

end;

procedure PlayMusic;

var s: shortstring;

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;

procedure PauseMusic;

begin

    if (MusicFN = '') or (not isMusicEnabled) then

        exit;

    Mix_PauseMusic(Mus);

end;

procedure ResumeMusic;

begin

    if (MusicFN = '') or (not isMusicEnabled) then

        exit;

    Mix_ResumeMusic(Mus);

end;

procedure initModule;

begin

    MusicFN:='';

end;

procedure freeModule;

begin

    if isSoundEnabled then

        ReleaseSound();

end;

end.