def message_rcvd(bus, message, pipeline, resolution):
t = message.type
if t == gst.MESSAGE_STATE_CHANGED:
if message.src == pipeline:
old, new, pending = message.parse_state_changed()
if new == gst.STATE_PLAYING:
run_check(pipeline, resolution)
elif t == gst.MESSAGE_ERROR:
gerror, debug = message.parse_error()
# set pipeline state to NULL so worker does not consume
# unnecessary resources
pipeline.set_state(gst.STATE_NULL)
resolution.errback(
errors.GStreamerGstError(message.src, gerror, debug))
elif t == gst.MESSAGE_EOS:
resolution.errback(
errors.GStreamerError("Unexpected end of stream"))
else:
log.debug(
'check', 'message: %s: %s:' %
(message.src.get_path_string(), message.type.value_nicks[1]))
if message.structure:
log.debug('check',
'message: %s' % message.structure.to_string())
else:
log.debug('check', 'message: (no structure)')
return True
def have_error(self, curstate, message):
# if we have a state change defer that has not yet
# fired, we should errback it
changes = [gst.STATE_CHANGE_NULL_TO_READY,
gst.STATE_CHANGE_READY_TO_PAUSED,
gst.STATE_CHANGE_PAUSED_TO_PLAYING]
extras = ((gst.STATE_PAUSED, gst.STATE_CHANGE_PLAYING_TO_PAUSED),
(gst.STATE_READY, gst.STATE_CHANGE_PAUSED_TO_READY),
(gst.STATE_NULL, gst.STATE_CHANGE_READY_TO_NULL))
for state, change in extras:
if curstate <= state:
changes.append(change)
for change in changes:
if change in self:
self.log("We have an error, going to errback pending "
"state change defers")
gerror, debug = message.parse_error()
for d in self[change]:
d.errback(errors.GStreamerGstError(
message.src, gerror, debug))
del self[change]