/*
    sound.cpp - sounds, oddly enough
    Copyright (C) 2006-20077 Mark boyd
    
    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; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be fun to play,
    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.,
    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#include <map>

#include <SDL_inc.h>

#include "sound.h"
#include "debug.h"
#include "dirs.h"

//This file is essentially the minimum amount of work on top of SDL_mixer to make it usable

namespace sound
{
  std::map<snd_id, Mix_Chunk *> sounds;
}

void sound::init()
{
  if (Mix_OpenAudio(44100,MIX_DEFAULT_FORMAT,2,1024)<0) DBG_WHINE("Sound init failed\n");
  
  Mix_AllocateChannels(16);
  
  #define SOUND(A,B) sounds[A]=Mix_LoadWAV((dirs::sound_dir+"/"+B).c_str());
  #include "sound_table.h"
  #undef SOUND
}

void sound::play(sound::snd_id s)
{
  sound::play(s, 1.0);
}

void sound::play(sound::snd_id s, float volume)
{
  Mix_Chunk *chunk=sounds[s];

  if (chunk) 
  {
    int nchan=Mix_AllocateChannels(-1);
    for(int i=0; i<nchan; ++i)
    {
      if (!Mix_Playing(i))
      {
        //OK, use this channel
        Mix_Volume(i, static_cast<int>(volume*MIX_MAX_VOLUME));
        Mix_PlayChannel(i, chunk, 0);
        
        return;
      }
    }
  }
}


void sound::kill()
{
  for(std::map<snd_id, Mix_Chunk *>::iterator i=sounds.begin(); i!=sounds.end(); ++i)
  { 
    Mix_FreeChunk(i->second); 
  }
  Mix_CloseAudio();
}