def schedule_next(self, fast=False):
"""
Schedule next thumbnail based on priority.
"""
if self._timer.active or not self.jobs:
return
if fast:
# We already waited the last delay, but didn't end up consuming
# CPU, so consider our debt paid.
delay = 0
else:
delay = scheduler.next(config.scheduler.policy) * config.scheduler.multiplier
if self.jobs[0].priority:
# Thumbnail is high priority, use less of a delay.
delay /= 10.0
self._timer.start(delay)
def schedule_next(self, fast=False):
"""
Schedule next thumbnail based on priority.
"""
if self._timer.active or not self.jobs:
return
if fast:
# We already waited the last delay, but didn't end up consuming
# CPU, so consider our debt paid.
delay = 0
else:
delay = scheduler.next(
config.scheduler.policy) * config.scheduler.multiplier
if self.jobs[0].priority:
# Thumbnail is high priority, use less of a delay.
delay /= 10.0
self._timer.start(delay)
def _thumbnailer(self):
while self.jobs and not kaa.main.is_stopped():
job = self.jobs.pop(0)
log.info('Now processing video thumbnail job: file=%s, qlen=%d', job.filename, len(self.jobs))
for size in ('large', 'normal'):
imagefile = job.imagefile % size
if not os.path.isfile(imagefile):
# One (or both) of the large and normal thumbnails don't exist, so
# we must generate.
break
metadata = kaa.metadata.parse(imagefile)
mtime = metadata.get('Thumb::MTime')
if mtime != str(os.stat(job.filename)[stat.ST_MTIME]):
# File mtime doesn't match the stored mtime in the thumbnail metadata,
# so must regenerate.
break
else:
# No thumb generation needed.
continue
# XXX: this isn't very effective because we can't throttle mplayer
# once it's running. We run mplayer at the lowest possible priority
# (if schedtool is available), so that'll have to suffice.
# IDEA: actually we can throttle mplayer, if we remove -benchmark and pass -fps.
delay = scheduler.next(self.config.scheduler.policy) * self.config.scheduler.multiplier
if delay:
# too much CPU load, slow down
yield kaa.delay(delay)
try:
success = yield self._generate(job)
except Exception:
success = False
if not success:
# Something went awry, generate a failed thumbnail file.
self.create_failed(job)
# Notify client via rpc that this thumbnail job is done.
self.notify_client(job)
