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subprojects/gst-python/testsuite/old/test_event.py

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+# -*- 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
+
+import os
+import sys
+import time
+import tempfile
+
+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')
+        # FIXME: wait for state change thread to die
+        while self.pipeline.__gstrefcount__ > 1:
+            gst.debug('waiting for self.pipeline G rc to drop to 1')
+            time.sleep(0.1)
+        self.assertEquals(self.pipeline.__gstrefcount__, 1)
+
+        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')
+
+        self.assertEqual(event.parse_seek(), (1.0, gst.FORMAT_BYTES, gst.SEEK_FLAG_FLUSH,
+            gst.SEEK_TYPE_SET, 0, gst.SEEK_TYPE_NONE, 0))
+
+    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):
+
+   def setUp(self):
+       TestCase.setUp(self)
+       gst.info("start")
+       self.filename = tempfile.mktemp()
+       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)
+    
+
+class TestDelayedEventProbe(TestCase):
+    # this test:
+    # starts a pipeline with only a source
+    # adds an event probe to catch the (first) new-segment
+    # adds a buffer probe to "autoplug" and send out this event
+    def setUp(self):
+        TestCase.setUp(self)
+        self.pipeline = gst.Pipeline()
+        self.src = gst.element_factory_make('fakesrc')
+        self.src.set_property('num-buffers', 10)
+        self.pipeline.add(self.src)
+        self.srcpad = self.src.get_pad('src')
+        
+    def tearDown(self):
+        gst.debug('setting pipeline to NULL')
+        self.pipeline.set_state(gst.STATE_NULL)
+        gst.debug('set pipeline to NULL')
+        # FIXME: wait for state change thread to die
+        while self.pipeline.__gstrefcount__ > 1:
+            gst.debug('waiting for self.pipeline G rc to drop to 1')
+            time.sleep(0.1)
+        self.assertEquals(self.pipeline.__gstrefcount__, 1)
+
+    def testProbe(self):
+        self.srcpad.add_event_probe(self._event_probe_cb)
+        self._buffer_probe_id = self.srcpad.add_buffer_probe(
+            self._buffer_probe_cb)
+
+        self._newsegment = None
+        self._eos = None
+        self._had_buffer = False
+
+        self.pipeline.set_state(gst.STATE_PLAYING)
+
+        while not self._eos:
+            time.sleep(0.1)
+
+        # verify if our newsegment event is still around and valid
+        self.failUnless(self._newsegment)
+        self.assertEquals(self._newsegment.type, gst.EVENT_NEWSEGMENT)
+        self.assertEquals(self._newsegment.__grefcount__, 1)
+
+        # verify if our eos event is still around and valid
+        self.failUnless(self._eos)
+        self.assertEquals(self._eos.type, gst.EVENT_EOS)
+        self.assertEquals(self._eos.__grefcount__, 1)
+ 
+    def _event_probe_cb(self, pad, event):
+        if event.type == gst.EVENT_NEWSEGMENT:
+            self._newsegment = event
+            self.assertEquals(event.__grefcount__, 3)
+            # drop the event, we're storing it for later sending
+            return False
+
+        if  event.type == gst.EVENT_EOS:
+            self._eos = event
+            # we also want fakesink to get it
+            return True
+
+        # sinks now send Latency events upstream
+        if event.type == gst.EVENT_LATENCY:
+            return True
+
+        self.fail("Got an unknown event %r" % event)
+
+    def _buffer_probe_cb(self, pad, buffer):
+        self.failUnless(self._newsegment)
+
+        # fake autoplugging by now putting in a fakesink
+        sink = gst.element_factory_make('fakesink')
+        self.pipeline.add(sink)
+        self.src.link(sink)
+        sink.set_state(gst.STATE_PLAYING)
+
+        pad = sink.get_pad('sink')
+        pad.send_event(self._newsegment)
+
+        # we don't want to be called again
+        self.srcpad.remove_buffer_probe(self._buffer_probe_id)
+        
+        self._had_buffer = True
+        # now let the buffer through
+        return True
+
+class TestEventCreationParsing(TestCase):
+
+    def testEventStep(self):
+        if hasattr(gst.Event, "parse_step"):
+            e = gst.event_new_step(gst.FORMAT_TIME, 42, 1.0, True, True)
+
+            self.assertEquals(e.type, gst.EVENT_STEP)
+
+            fmt, amount, rate, flush, intermediate = e.parse_step()
+            self.assertEquals(fmt, gst.FORMAT_TIME)
+            self.assertEquals(amount, 42)
+            self.assertEquals(rate, 1.0)
+            self.assertEquals(flush, True)
+            self.assertEquals(intermediate, True)
+
+if __name__ == "__main__":
+    unittest.main()