validate: launcher: Force clock syncronization for some scenarios

In some cases it is necessary that the clock is sync so that all the
actions can be executed.

validate/data/change_state_intensive.scenario

@@ -1,4 +1,4 @@
-description, duration=0, summary="Set state to NULL->PLAYING->NULL 20 times"
+description, duration=0, summary="Set state to NULL->PLAYING->NULL 20 times", need-clock-sync=true
 set-state, state="null"
 set-state, state="playing"
 set-state, state="null"

validate/data/fast_backward.scenario

@@ -1,4 +1,4 @@
-description, duration=30.0, minfo-media-duration=310.0, seek=true, reverse-playback=true
+description, duration=30.0, minfo-media-duration=310.0, seek=true, reverse-playback=true, need-clock-sync=true
 seek, name=Fast-backward-seek, playback_time=0.0,   rate=-2.0,  start=0.0, stop=310.0, flags=accurate+flush
 seek, name=Fast-backward-seek, playback_time=300.0, rate=-4.0,  start=0.0, stop=300.0, flags=accurate+flush
 seek, name=Fast-backward-seek, playback_time=280.0, rate=-8.0,  start=0.0, stop=280.0, flags=accurate+flush

validate/data/fast_forward.scenario

@@ -1,4 +1,4 @@
-description, duration=35.0, seek=true
+description, duration=35.0, seek=true, need-clock-sync=true
 seek, name=Fast-forward-seek, playback_time=0.0, rate=2.0,  start=0.0, flags=accurate+flush
 seek, name=Fast-forward-seek, playback_time="min(10.0, duration*0.25)", rate=4.0,  start=0.0, flags=accurate+flush
 seek, name=Fast-forward-seek, playback_time="min(20.0, duration*0.50)", rate=8.0,  start=0.0, flags=accurate+flush

validate/data/seek_backward.scenario

@@ -1,4 +1,4 @@
-description, seek=true, duration=30
+description, seek=true, duration=30, need-clock-sync=true
 seek, name=Backward-seek, playback_time="min(5.0, (duration/4))", rate=1.0, start=0.0, flags=accurate+flush
 seek, name=Backward-seek, playback_time="min(10.0, 2*(duration/4))", rate=1.0, start="min(5.0, duration/4)", flags=accurate+flush
 seek, name=Backward-seek, playback_time="min(15.0, 3*(duration/4))", rate=1.0, start="min(10.0, 2*(duration/4))", flags=accurate+flush

validate/data/seek_forward.scenario

@@ -1,4 +1,4 @@
-description, seek=true, duration=20
+description, seek=true, duration=20, need-clock-sync=true
 seek, name=First-forward-seek, playback_time="min(5.0, (duration/8))", start="min(10, 2*(duration/8))", flags=accurate+flush
 seek, name=Second-forward-seek, playback_time="min(15.0, 3*(duration/8))", start="min(20, 4*(duration/8))", flags=accurate+flush
 seek, name=Third-forward-seek, playback_time="min(25, 5*(duration/8))", start="min(30.0, 6*(duration/8))", flags=accurate+flush

validate/tools/launcher/apps/gst-validate.py

@@ -161,15 +161,20 @@ class GstValidatePlaybinTestsGenerator(GstValidatePipelineTestsGenerator):
             pipe = self._pipeline_template
             protocol = minfo.media_descriptor.get_protocol()
 
-            if self.test_manager.options.mute:
-                fakesink = "'fakesink'"
-                pipe += " audio-sink=%s video-sink=%s" %(fakesink, fakesink)
-
             pipe += " uri=%s" % uri
             for scenario in special_scenarios + scenarios:
+                cpipe = pipe
                 if not minfo.media_descriptor.is_compatible(scenario):
                     continue
 
+                if self.test_manager.options.mute:
+                    if scenario.needs_clock_sync():
+                        fakesink = "'fakesink sync=true'"
+                    else:
+                        fakesink = "'fakesink'"
+
+                    cpipe += " audio-sink=%s video-sink=%s" %(fakesink, fakesink)
+
                 fname = "%s.%s" % (self.get_fname(scenario,
                                    protocol),
                                    os.path.basename(uri).replace(".", "_"))
@@ -177,12 +182,12 @@ class GstValidatePlaybinTestsGenerator(GstValidatePipelineTestsGenerator):
 
                 if scenario.does_reverse_playback() and protocol == Protocols.HTTP:
                     # 10MB so we can reverse playback
-                    pipe += " ring-buffer-max-size=10485760"
+                    cpipe += " ring-buffer-max-size=10485760"
 
                 self.add_test(GstValidateLaunchTest(fname,
                                                     self.test_manager.options,
                                                     self.test_manager.reporter,
-                                                    pipe,
+                                                    cpipe,
                                                     scenario=scenario,
                                                     media_descriptor=minfo.media_descriptor)
                               )

validate/tools/launcher/baseclasses.py

@@ -849,6 +849,12 @@ class Scenario(object):
 
         return False
 
+    def needs_clock_sync(self):
+        if hasattr(self, "need_clock_sync"):
+            return bool(self.need_clock_sync)
+
+        return False
+
     def does_reverse_playback(self):
         if hasattr(self, "reverse_playback"):
             return bool(self.seek)
@@ -1032,6 +1038,11 @@ class MediaDescriptor(Loggable):
                        scenario, self.get_uri())
             return False
 
+        if self.is_image() and scenario.needs_clock_sync():
+            self.debug("Do not run %s as %s is an image",
+                       scenario, self.get_uri())
+            return False
+
         for track_type in ['audio', 'subtitle']:
             if self.get_num_tracks(track_type) < scenario.get_min_tracks(track_type):
                 self.debug("%s -- %s | At least %s %s track needed  < %s"