example of Mix_LoadWAV_RW

load_wav.cr

require "../src/sdl"
require "../src/mixer"

SDL.init(SDL::Init::VIDEO | SDL::Init::AUDIO); at_exit { SDL.quit }
SDL::Mixer.init(SDL::Mixer::Init::MP3); at_exit { SDL::Mixer.quit }
SDL::Mixer.open

chunk = {} of String => LibMixer::Mix_Chunk*
names = %w(high medium low scratch)

names.each do |name|
  rwops = LibSDL.rw_from_file("samples/data/#{name}.wav", "rb")
  chunk[name] = LibMixer.load_wav_rw(rwops, 1)
end

loop do
  case event = SDL::Event.wait
  when SDL::Event::Keyboard
    case event.sym
    when .key_1?               then SDL::Mixer.play_wav(chunk["high"])
    when .key_2?               then SDL::Mixer.play_wav(chunk["medium"])
    when .key_3?               then SDL::Mixer.play_wav(chunk["low"])
    when .key_4?               then SDL::Mixer.play_wav(chunk["scratch"])
    when .q?, SDL::Event::Quit then break
    end if event.keyup?
  end
end