Possibly a error within ruby2d's library method regarding Audio input? - ruby

Question

undefined method `pause' for #<Ruby2D::Sound:0x000002728db4b250 #path="musics/machinegun.mp3", #data=#<Object:0x000002728db4b1d8>> (NoMethodError)
pause or stop etc is a built-in method in ruby2d but I can not seem to make this work. I think that a specific part of ruby2d method might ran into an error because the play method, which is in the same category, still works fine but not the other aforementioned functions.
assault_rifle = Sound.new('musics/machinegun.mp3')
on :key_held do |event|
if event.key == 'k'
mainscreen.player_fire_bullet
assault_rifle.play # this works!
end
if event.key == 'l'
assault_rifle.pause # this is just to test my theory that the method is broken
end
end
on :key_up do |event|
if event.key == 'k'
assault_rifle.stop #method error here?
end
end
For more information regarding ruby2d 's audio, you can read it here: https://www.ruby2d.com/learn/audio/
I hope some one could look into this

Answer 1

It's not a bug.
The Ruby2D::Sound class doesn't have a #pause method.
# frozen_string_literal: true
# Ruby2D::Sound
module Ruby2D
# Sounds are intended to be short samples, played without interruption, like an effect.
class Sound
attr_reader :path
attr_accessor :loop, :data
#
# Load a sound from a file
# #param [String] path File to load the sound from
# #param [true, false] loop If +true+ playback will loop automatically, default is +false+
# #raise [Error] if file cannot be found or music could not be successfully loaded.
def initialize(path, loop: false)
raise Error, "Cannot find audio file `#{path}`" unless File.exist? path
#path = path
#loop = loop
raise Error, "Sound `#{#path}` cannot be created" unless ext_init(#path)
end
# Play the sound
def play
ext_play
end
# Stop the sound
def stop
ext_stop
end
# Returns the length in seconds
def length
ext_length
end
# Get the volume of the sound
def volume
ext_get_volume
end
# Set the volume of the sound
def volume=(volume)
# Clamp value to between 0-100
ext_set_volume(volume.clamp(0, 100))
end
# Get the volume of the sound mixer
def self.mix_volume
ext_get_mix_volume
end
# Set the volume of the sound mixer
def self.mix_volume=(volume)
# Clamp value to between 0-100
ext_set_mix_volume(volume.clamp(0, 100))
end
end
end
Note:
Sounds are intended to be short samples, played without interruption, like an effect.
If you look at the linked example they are using the Music class which does.
song = Music.new('song.mp3')
# Play the music
song.play
# Pause the music
song.pause
The top level doc also states:
Music is for longer pieces which can be played, paused, stopped, resumed, and faded out, like a background soundtrack.