Initial import

diff --git a/gst-simple-player.py b/gst-simple-player.py
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+++ b/gst-simple-player.py
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+#!/usr/bin/env python
+
+# Simple media player with GStreamer
+#
+# Copyright (C) 2013  Antonio Ospite <ospite@studenti.unina.it>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program 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 General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# References:
+# http://pygstdocs.berlios.de/pygst-reference
+# https://core.fluendo.com/gstreamer/svn/trunk/gst-fluendo-gdlsink/test/ismdplay.py
+
+import sys
+import os
+
+import gobject
+gobject.threads_init()
+
+import gst
+
+# The player window will have a fixed width and height.
+# This is just to demonstrate the use of capabilities.
+WIDTH = 640
+HEIGHT = 480
+
+
+class CustomVideoBin(gst.Bin):
+    def __init__(self):
+        gst.Bin.__init__(self, 'CustomVideoBin')
+
+        queue = gst.element_factory_make('queue', 'vqueue')
+        self.add(queue)
+
+        caps = gst.Caps("video/x-raw-yuv,format=(fourcc)AYUV,width=%d,height=%d" % (HEIGHT, WIDTH))
+        capsfilter = gst.element_factory_make("capsfilter", "filter")
+        capsfilter.set_property("caps", caps)
+        self.add(capsfilter)
+
+        rescale = gst.element_factory_make("videoscale", "rescale")
+        self.add(rescale)
+
+        colorspace = gst.element_factory_make("colorspace", "colorspace")
+        self.add(colorspace)
+
+        videosink = gst.element_factory_make("autovideosink", "vidoesink")
+        self.add(videosink)
+
+        gst.element_link_many(queue, capsfilter, rescale, colorspace, videosink)
+        sink = queue.get_pad('sink')
+        self.add_pad(gst.GhostPad('sink', sink))
+
+
+class CustomAudioBin(gst.Bin):
+    def __init__(self):
+        gst.Bin.__init__(self, 'CustomAudioBin')
+
+        queue = gst.element_factory_make('queue', 'aqueue')
+        self.add(queue)
+
+        audioconvert = gst.element_factory_make("audioconvert", "audioconverter")
+        self.add(audioconvert)
+
+        audiosink = gst.element_factory_make("autoaudiosink", "audiosink")
+        self.add(audiosink)
+
+        gst.element_link_many(queue, audioconvert, audiosink)
+        sink = queue.get_pad('sink')
+        self.add_pad(gst.GhostPad('sink', sink))
+
+
+class CustomPlayBin(gst.Pipeline):
+    __gproperties__ = {
+        'source': (gst.Element, "source", "Source element", gobject.PARAM_READABLE)
+    }
+
+    def __init__(self, uri=None):
+        gst.Pipeline.__init__(self, 'CustomPlayBin')
+
+        self._uri = uri
+
+        self._playbin = gst.element_factory_make("playbin2", "playbin")
+        self.add(self._playbin)
+
+        self._playbin.set_property("uri", self._uri)
+        self._playbin.set_property("video-sink", CustomVideoBin())
+        self._playbin.set_property("audio-sink", CustomAudioBin())
+
+    def set_uri(self, uri):
+        self._uri = uri
+        self._playbin.set_property("uri", self._uri)
+
+
+class GstPlayer:
+    def __init__(self):
+
+        # The user can require some action at End Of Stream
+        self.eos_cb = None
+
+        self.pipeline = CustomPlayBin()
+
+        bus = self.pipeline.get_bus()
+        bus.add_signal_watch()
+        bus.connect('message::eos', self.on_eos)
+        bus.connect('message::tag', self.on_tag)
+        bus.connect('message::error', self.on_error)
+        bus.connect('message::state-changed', self.on_state_changed)
+
+    def on_eos(self, bus, msg):
+        print 'on_eos'
+        self.stop()
+        if self.eos_cb:
+            self.eos_cb()
+
+    def on_tag(self, bus, msg):
+        print 'on_tag:'
+        taglist = msg.parse_tag()
+        for key in taglist.keys():
+            print '\t%s = %s' % (key, taglist[key])
+
+    def on_error(self, bus, msg):
+        print 'on_error'
+        error, debug = msg.parse_error()
+        print "Error: %s" % error, debug
+        self.stop()
+
+    def on_state_changed(self, bus, msg):
+        print 'on_state_changed'
+        if msg.src != self.pipeline:
+            return
+
+        old_state, new_state, pending = msg.parse_state_changed()
+
+    def set_location(self, location):
+        self.pipeline.set_uri(location)
+
+    def play(self):
+        self.pipeline.set_state(gst.STATE_PLAYING)
+
+    def pause(self):
+        self.pipeline.set_state(gst.STATE_PAUSED)
+
+    def stop(self):
+        self.pipeline.set_state(gst.STATE_NULL)
+
+
+class PlayerTUI():
+    def __init__(self, location):
+
+        self.player = GstPlayer()
+        self.player.eos_cb = self.quit
+
+        self.mainloop = gobject.MainLoop()
+
+        self.player.set_location(location)
+        self.player.play()
+
+        gobject.io_add_watch(sys.stdin, gobject.IO_IN, self.on_stdin)
+
+        try:
+            self.mainloop.run()
+        except KeyboardInterrupt:
+            self.quit()
+
+    def on_stdin(self, fd, event):
+        # The user has to send a newline fo this to go on
+        c = os.read(fd.fileno(), 1)
+
+        if c == "q":
+            self.quit()
+        elif c == "s":
+            self.player.pause()
+        elif c == "r":
+            self.player.play()
+
+        return True
+
+    def quit(self):
+        self.player.stop()
+        self.player = None
+        self.mainloop.quit()
+
+
+def main(args):
+    def usage():
+        sys.stdout.write("usage: %s <URI-OF-MEDIA-FILE>\n" % args[0])
+
+    if len(args) != 2:
+        usage()
+        sys.exit(1)
+
+    if not gst.uri_is_valid(args[1]):
+        sys.stderr.write("Error: Invalid URI: %s\n" % args[1])
+        sys.exit(1)
+
+    tui = PlayerTUI(args[1])
+
+if __name__ == '__main__':
+    sys.exit(main(sys.argv))