gstreamer/testsuite/test_event.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 os
import sys
from common import gst, unittest, testhelper, TestCase

class EventTest(TestCase):
    def setUp(self):
        TestCase.setUp(self)
        self.pipeline = gst.parse_launch('fakesrc ! fakesink name=sink')
        self.sink = self.pipeline.get_by_name('sink')
        self.pipeline.set_state(gst.STATE_PLAYING)

    def tearDown(self):
        gst.debug('setting pipeline to NULL')
        self.pipeline.set_state(gst.STATE_NULL)
        gst.debug('set pipeline to NULL')

        del self.sink
        del self.pipeline
        TestCase.tearDown(self)
        
    def testEventSeek(self):
        # this event only serves to change the rate of data transfer
        event = gst.event_new_seek(1.0, gst.FORMAT_BYTES, gst.SEEK_FLAG_FLUSH,
            gst.SEEK_TYPE_NONE, 0, gst.SEEK_TYPE_NONE, 0)
        # FIXME: but basesrc goes into an mmap/munmap spree, needs to be fixed

        event = gst.event_new_seek(1.0, gst.FORMAT_BYTES, gst.SEEK_FLAG_FLUSH,
            gst.SEEK_TYPE_SET, 0, gst.SEEK_TYPE_NONE, 0)
        assert event
        gst.debug('sending event')
        self.sink.send_event(event)
        gst.debug('sent event')

    def testWrongEvent(self):
        buffer = gst.Buffer()
        self.assertRaises(TypeError, self.sink.send_event, buffer)
        number = 1
        self.assertRaises(TypeError, self.sink.send_event, number)


class EventFileSrcTest(TestCase):
   # FIXME: properly create temp files
   filename = '/tmp/gst-python-test-file'
   def setUp(self):
       TestCase.setUp(self)
       gst.info("start")
       if os.path.exists(self.filename):
           os.remove(self.filename)
       open(self.filename, 'w').write(''.join(map(str, range(10))))
       
       self.pipeline = gst.parse_launch('filesrc name=source location=%s blocksize=1 ! fakesink signal-handoffs=1 name=sink' % self.filename)
       self.source = self.pipeline.get_by_name('source')
       self.sink = self.pipeline.get_by_name('sink')
       self.sigid = self.sink.connect('handoff', self.handoff_cb)
       self.bus = self.pipeline.get_bus()
       
   def tearDown(self):
       self.pipeline.set_state(gst.STATE_NULL)
       self.sink.disconnect(self.sigid)
       if os.path.exists(self.filename):
           os.remove(self.filename)
       del self.bus
       del self.pipeline
       del self.source
       del self.sink
       del self.handoffs
       TestCase.tearDown(self)

   def handoff_cb(self, element, buffer, pad):
       self.handoffs.append(str(buffer))

   def playAndIter(self):
       self.handoffs = []
       self.pipeline.set_state(gst.STATE_PLAYING)
       assert self.pipeline.set_state(gst.STATE_PLAYING)
       while 42:
           msg = self.bus.pop()
           if msg and msg.type == gst.MESSAGE_EOS:
               break
       assert self.pipeline.set_state(gst.STATE_PAUSED)
       handoffs = self.handoffs
       self.handoffs = []
       return handoffs

   def sink_seek(self, offset, method=gst.SEEK_TYPE_SET):
       self.sink.seek(1.0, gst.FORMAT_BYTES, gst.SEEK_FLAG_FLUSH,
                      method, offset,
                      gst.SEEK_TYPE_NONE, 0)
      
   def testSimple(self):
       handoffs = self.playAndIter()
       assert handoffs == map(str, range(10))
   
   def testSeekCur(self):
       self.sink_seek(8)
       self.playAndIter()

class TestEmit(TestCase):
    def testEmit(self):
        object = testhelper.get_object()
        object.connect('event', self._event_cb)
        
        # First emit from C
        testhelper.emit_event(object)

        # Then emit from Python
        object.emit('event', gst.event_new_eos())
        
    def _event_cb(self, obj, event):
        assert isinstance(event, gst.Event)
    

if __name__ == "__main__":
    unittest.main()