void
ConfigManager::set_music_volume(int v)
{
log_info("ConfigManager::set_music_volume: %1%", v);
Sound::PingusSound::set_music_volume(static_cast<float>(v) / 100.0f);
m_opts.music_volume.set(get_music_volume());
}
void AudioEngine::play_music(std::string file_location) {
if(currently_playing.compare(file_location) != 0) { //only change the song if it's not already playing!
//Initialise audio variables
int audio_rate; //output sampling rate (in Hz)
Uint16 audio_format; //output sample format.
int audio_channels; //the number of channels for the output.
int audio_buffers; //the chunk size of the output, larger is better for slower machines but means the sound will be delayed more.
int audio_volume; //the volume at which you wish to play the music
int looping; //wether the music should loop or not
// Initialize variables
audio_rate = MIX_DEFAULT_FREQUENCY; //22050
audio_format = AUDIO_S16; //Signed 16-bit samples, in little-endian byte order
audio_channels = 2; //1 = mono, 2 = stereo
audio_buffers = 4096; //good value for slower machines and doesn't have too much delay (shouldn't matter too much for music vs sound effects anyway
audio_volume = get_music_volume();
looping = -1; //loop through the music forever
//Initialise the audio API, returns -1 on errors so check it initialises correctly
if(Mix_OpenAudio(audio_rate, audio_format, audio_channels, audio_buffers) < 0) {
LOG(ERROR) << "Couldn't open audio: " << SDL_GetError(); //LOG why Audio couldn't be initialised
audio_open = false;
return;
}
//Query the auddio device for it's settings.
Mix_QuerySpec(&audio_rate, &audio_format, &audio_channels);
// Set the music volume
set_music_volume(audio_volume);
const char* c_file_location = file_location.c_str(); //Convert the file_location to a c string for the SDL API
music = Mix_LoadMUS(c_file_location); //Load in the music
if (music == nullptr ) {
LOG(ERROR) << "Couldn't load " << c_file_location << ": " << SDL_GetError(); //print why music couldn't be loaded to the screen
Mix_CloseAudio(); //close down the audio system
audio_open = false;
return;
}
//while(!Mix_FadeOutMusic(1000) && Mix_PlayingMusic()) {
// wait for any fades to complete
// SDL_Delay(100);
//} //TODO: implement some sort of music (and screen!) fade
//Start playing the music.
if(Mix_FadeInMusic(music, looping, 2000) == -1) {
LOG(ERROR) << "Mix_FadeInMusic: " << Mix_GetError();
// well, there's no music, but most games don't break without music...
}
currently_playing = file_location;
}
return;
}