class Alexandria::UI::SoundEffectsPlayer
Uses Ruby/GStreamer to play Ogg/Vorbis sound effects
Public Class Methods
new()
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# File lib/alexandria/ui/sound.rb, line 31 def initialize @sounds_dir = Alexandria::Config::SOUNDS_DIR @ogg_vorbis_pipeline = Gst::Pipeline.new set_up_pipeline @playing = false set_up_bus_watch end
Public Instance Methods
play(effect)
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# File lib/alexandria/ui/sound.rb, line 39 def play(effect) file = File.join(@sounds_dir, "#{effect}.ogg") if @playing log.debug { "Already playing #{effect}." } else log.debug { "Not playing. Starting #{effect}." } @filesrc.location = file start_playback end end
set_up_bus_watch()
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# File lib/alexandria/ui/sound.rb, line 72 def set_up_bus_watch @bus = @ogg_vorbis_pipeline.bus @bus.add_watch do |_bus, message| case message.type when Gst::MessageType::EOS stop_playback when Gst::MessageType::ERROR log.debug { "ERROR loop.quit" } log.debug { message.parse.inspect } stop_playback end true end end
set_up_pipeline()
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# File lib/alexandria/ui/sound.rb, line 50 def set_up_pipeline @filesrc = Gst::ElementFactory.make("filesrc") demuxer = Gst::ElementFactory.make("oggdemux") decoder = Gst::ElementFactory.make("vorbisdec") converter = Gst::ElementFactory.make("audioconvert") # #?? audiosink = Gst::ElementFactory.make("autoaudiosink") @ogg_vorbis_pipeline.add(@filesrc, demuxer, decoder, converter, audiosink) @filesrc >> demuxer # this next must be a dynamic link, as demuxers potentially # have multiple src pads (for audio/video muxed streams) demuxer.signal_connect("pad-added") do |_parser, ogg_src_pad| vorbis_sink_pad = decoder.sinkpads.first ogg_src_pad.link(vorbis_sink_pad) end decoder >> converter >> audiosink end
start_playback()
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# File lib/alexandria/ui/sound.rb, line 87 def start_playback @playing = true @ogg_vorbis_pipeline.play end
stop_playback()
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# File lib/alexandria/ui/sound.rb, line 92 def stop_playback @ogg_vorbis_pipeline.stop @playing = false end