gstreamer/testsuite/test_pipeline.py

# -*- Mode: Python -*-
# vi:si:et:sw=4:sts=4:ts=4
#
# gst-python - Python bindings for GStreamer
# Copyright (C) 2002 David I. Lehn
# Copyright (C) 2004 Johan Dahlin
# Copyright (C) 2005 Edward Hervey
#
# 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA

import time

from common import gst, unittest, TestCase

import gobject

class TestConstruction(TestCase):
    def setUp(self):
        self.gctrack()

    def tearDown(self):
        self.gccollect()
        self.gcverify()

    def testGoodConstructor(self):
        name = 'test-pipeline'
        pipeline = gst.Pipeline(name)
        self.assertEquals(pipeline.__gstrefcount__, 1)
        assert pipeline is not None, 'pipeline is None'
        self.failUnless(isinstance(pipeline, gst.Pipeline),
            'pipeline is not a GstPipline')
        assert pipeline.get_name() == name, 'pipelines name is wrong'
        self.assertEquals(pipeline.__gstrefcount__, 1)

    def testParseLaunch(self):
        pipeline = gst.parse_launch('fakesrc ! fakesink')
        
class Pipeline(TestCase):
    def setUp(self):
        self.gctrack()
        self.pipeline = gst.Pipeline('test-pipeline')
        source = gst.element_factory_make('fakesrc', 'source')
        source.set_property('num-buffers', 5)
        sink = gst.element_factory_make('fakesink', 'sink')
        self.pipeline.add(source, sink)
        gst.element_link_many(source, sink)

    def tearDown(self):
        del self.pipeline
        self.gccollect()
        self.gcverify()

    def testRun(self):
        self.assertEqual(self.pipeline.get_state(None)[1], gst.STATE_NULL)
        self.pipeline.set_state(gst.STATE_PLAYING)
        self.assertEqual(self.pipeline.get_state(None)[1], gst.STATE_PLAYING)
        
        time.sleep(1)

        self.assertEqual(self.pipeline.get_state(None)[1], gst.STATE_PLAYING)
        self.pipeline.set_state(gst.STATE_NULL)
        self.assertEqual(self.pipeline.get_state(None)[1], gst.STATE_NULL)

class Bus(TestCase):
    def testGet(self):
        pipeline = gst.Pipeline('test')
        self.assertEquals(pipeline.__gstrefcount__, 1)
        bus = pipeline.get_bus()
        self.assertEquals(pipeline.__gstrefcount__, 1)
        # one for python and one for the pipeline
        self.assertEquals(bus.__gstrefcount__, 2)

        del pipeline
        self.failUnless(self.gccollect())
        self.assertEquals(bus.__gstrefcount__, 1)
        
class PipelineAndBus(TestCase):
    def setUp(self):
        TestCase.setUp(self)
        self.pipeline = gst.Pipeline('test-pipeline')
        self.pipeline.set_property('play-timeout', 0L)
        source = gst.element_factory_make('fakesrc', 'source')
        sink = gst.element_factory_make('fakesink', 'sink')
        self.pipeline.add(source, sink)
        gst.element_link_many(source, sink)

        self.bus = self.pipeline.get_bus()
        self.assertEquals(self.bus.__gstrefcount__, 2)
        self.handler = self.bus.add_watch(self._message_received)
        self.assertEquals(self.bus.__gstrefcount__, 3)
        self.assertEquals(self.pipeline.__gstrefcount__, 1)

        self.loop = gobject.MainLoop()

    def tearDown(self):
        # FIXME: fix the refcount issues with the bus/pipeline
        # flush the bus to be able to assert on the pipeline refcount
        #while self.pipeline.__gstrefcount__ > 1:
        self.gccollect()

        # one for the pipeline, two for the snake
        # three for the watch now shake shake shake but don't you
        self.assertEquals(self.bus.__gstrefcount__, 3)
        self.failUnless(gobject.source_remove(self.handler))
        self.assertEquals(self.bus.__gstrefcount__, 2)
        self.gccollect()

        gst.debug('THOMAS: pipeline rc %d' % self.pipeline.__gstrefcount__)
        #self.assertEquals(self.pipeline.__gstrefcount__, 1)
        del self.pipeline
        self.gccollect()
        #self.assertEquals(self.bus.__gstrefcount__, 2)
        del self.bus
        self.gccollect()

        # the async thread can be holding a ref, Wim is going to work on this
        #TestCase.tearDown(self)

    def _message_received(self, bus, message):
        gst.debug('received message: %s, %s' % (
            message.src.get_path_string(), message.type.value_nicks[1]))
        t = message.type
        if t == gst.MESSAGE_STATE_CHANGED:
            old, new = message.parse_state_changed()
            gst.debug('%r state change from %r to %r' % (
                message.src.get_path_string(), old, new))
            if message.src == self.pipeline and new == self.final:
                self.loop.quit()

        return True

    def testPlaying(self):
        self.final = gst.STATE_PLAYING
        ret = self.pipeline.set_state_async(gst.STATE_PLAYING)
        self.assertEquals(ret, gst.STATE_CHANGE_ASYNC)

        # go into a main loop to wait for messages
        self.loop.run()

        # we go to READY so we get messages; going to NULL would set
        # the bus flushing
        self.final = gst.STATE_READY
        ret = self.pipeline.set_state_async(gst.STATE_READY)
        self.assertEquals(ret, gst.STATE_CHANGE_ASYNC)
        self.loop.run()

        # FIXME: not setting to NULL causes a deadlock; we might want to
        # fix this in the bindings
        self.assertEquals(self.pipeline.set_state(gst.STATE_NULL),
            gst.STATE_CHANGE_SUCCESS)
        self.assertEquals(self.pipeline.get_state(),
            (gst.STATE_CHANGE_SUCCESS, gst.STATE_NULL, gst.STATE_VOID_PENDING))
        self.gccollect()
        
if __name__ == "__main__":
    unittest.main()