source: trunk/src/sdl/sdl_audio.cc @ 329

// Copyright (C) 2012-2014 ChaosForge Ltd
// http://chaosforge.org/
//
// This file is part of NV Libraries.
// For conditions of distribution and use, see copyright notice in nv.hh

#include "nv/sdl/sdl_audio.hh"

#include "nv/lib/sdl.hh"
#include "nv/lib/sdl_mixer.hh"
#include "nv/core/logging.hh"

using namespace nv;

sdl::audio::audio()
{
        nv::load_sdl_library();
        nv::load_sdl_mixer_library();

        if ( SDL_Init( SDL_INIT_AUDIO ) == -1 ) 
        {
                NV_LOG( LOG_CRITICAL, "SDL_AUDIO failed to load -- " << SDL_GetError() );
                return;
        }

        if( Mix_OpenAudio( 44100, MIX_DEFAULT_FORMAT, 2, 1024 ) == -1 )
        {
                NV_LOG( LOG_CRITICAL, "SDL_mixer failed to load -- " << Mix_GetError() );
                return;
        }
}


nv::channel sdl::audio::play_sound( sound a_sound )
{
        sound_info* info = m_sounds.get( a_sound );
        if ( info )
        {
                if ( Mix_PlayChannel(-1, (Mix_Chunk*)( info->sdl_sound), 0) == -1 )
                {
                        NV_LOG( LOG_WARNING, "SDL_mixer failed to play -- " << Mix_GetError() );
                }
        }
        return channel();
}

nv::sound nv::sdl::audio::load_sound( const std::string& a_path )
{
        // TODO: this is a really wierd error - if we remove this check, all hell gets loose
        if ( Mix_LoadWAV_RW == nullptr || SDL_RWFromFile == nullptr ) 
        {
                NV_LOG( LOG_ERROR, "SDL_mixer not loaded!" );
        }
        Mix_Chunk *sample = Mix_LoadWAV_RW(SDL_RWFromFile(a_path.c_str(), "rb"), 1);
        if ( sample == nullptr )
        {
                NV_LOG( LOG_ERROR, "SDL_mixer failed to load sample '" << a_path << "' -- " << Mix_GetError() );
                return sound();
        }
        sound result = m_sounds.create();
        sound_info* info = m_sounds.get( result );
        info->sdl_sound = sample;
        return result;
}

void nv::sdl::audio::update()
{
        // no-op
}

nv::sdl::audio::~audio()
{
        while ( m_sounds.size() > 0 )
                release( m_sounds.get_handle(0) );
        Mix_CloseAudio();
        // TODO: should we do it here?
        SDL_Quit();
}

void nv::sdl::audio::release( sound a_sound )
{
        sound_info* info = m_sounds.get( a_sound );
        if ( info )
        {
                Mix_FreeChunk( (Mix_Chunk*)info->sdl_sound );
                m_sounds.destroy( a_sound );
        }
}