Contents

require 'rubygems' # ugh
require 'ffi'

module Muter
  # from msdn on keybd_event ...
  
  VK_VOLUME_DOWN = 0xAE
  VK_VOLUME_UP = 0xAF
  VK_VOLUME_MUTE = 0xAD
  KEYEVENTF_KEYUP = 2
  
  extend FFI::Library
  ffi_lib 'user32'
  ffi_convention :stdcall

  attach_function :keybd_event, [ :uchar, :uchar, :int, :pointer ], :void
  
  def hit_mute_key
    # simulate pressing the mute key
    keybd_event(VK_VOLUME_MUTE, 0, 0, nil)
    keybd_event(VK_VOLUME_MUTE, 0, KEYEVENTF_KEYUP, nil)
  end
  
  def hit_volume_up_key
    keybd_event(VK_VOLUME_UP, 0, 0, nil)
    keybd_event(VK_VOLUME_UP, 0, KEYEVENTF_KEYUP, nil)
  end
  
  def hit_volume_down_key
    keybd_event(VK_VOLUME_DOWN, 0, 0, nil)
    keybd_event(VK_VOLUME_DOWN, 0, KEYEVENTF_KEYUP, nil)
  end
  
  def mute!
    #unmute! # just in case
    hit_mute_key
  end
  # TODO better for 7...
  def unmute!
    hit_mute_key # Windows XP...
    hit_volume_down_key
    hit_volume_up_key
  end
      
  # allow for Muter.xxx
  extend self
  
end

Version data entries

8 entries across 8 versions & 1 rubygems

Version	Path
sensible-cinema-0.7.5	lib/muter.rb
sensible-cinema-0.7.4	lib/muter.rb
sensible-cinema-0.7.3	lib/muter.rb
sensible-cinema-0.7.2	lib/muter.rb
sensible-cinema-0.7.1	lib/muter.rb
sensible-cinema-0.7.0	lib/muter.rb
sensible-cinema-0.6.1	lib/muter.rb
sensible-cinema-0.6.0	lib/muter.rb