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#!/usr/bin/env ruby
# -*- coding: utf-8 -*-
#
# This sample code is a port of
# gstreamer/tests/examples/launch/mp3parselaunch.c. It is licensed
# under the terms of the GNU Library General Public License, version
# 2 or (at your option) later.
#
# Copyright (C) 2013 Ruby-GNOME2 Project Team
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
require "gst"
def event_loop(pipe)
running = true
bus = pipe.bus
while running
message = bus.poll(Gst::MessageType::ANY, Gst::CLOCK_TIME_NONE)
raise "message nil" if message.nil?
case message.type
when Gst::MessageType::EOS
running = false
when Gst::MessageType::WARNING
warning, debug = message.parse_warning
puts "Debugging info: #{debug || 'none'}"
puts "Warning: #{warning.message}"
when Gst::MessageType::ERROR
error, debug = message.parse_error
puts "Debugging info: #{debug || 'none'}"
puts "Error: #{error.message}"
running = false
end
end
end
if ARGV.length < 1
puts "usage: #{$0} <mp3 file>"
exit(false)
end
bin, error = Gst.parse_launch("filesrc name=my_filesrc ! avdec_mp3 ! autoaudiosink")
if bin.nil?
$stderr.puts "Parse error: #{error.message}"
exit(false)
end
filesrc = bin.get_by_name("my_filesrc")
filesrc.location = ARGV[0]
# start playing
bin.play
# Run event loop listening for bus messages until EOS or ERROR
event_loop(bin)
# stop the bin
bin.stop
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