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https://github.com/ARM-software/devlib.git
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9eb88cd598
Add a poller which takes a screenshot at a configurable interval (`period`). Files are named based on the device timestamp, and are placed into a configurable output directory.
99 lines
3.1 KiB
Python
99 lines
3.1 KiB
Python
# Copyright 2018 ARM Limited
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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import logging
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import os
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import sys
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import threading
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import time
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from devlib.trace import TraceCollector
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from devlib.exception import WorkerThreadError
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class ScreenCapturePoller(threading.Thread):
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def __init__(self, target, period, output_path=None, timeout=30):
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super(ScreenCapturePoller, self).__init__()
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self.target = target
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self.logger = logging.getLogger('screencapture')
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self.period = period
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self.timeout = timeout
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self.stop_signal = threading.Event()
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self.lock = threading.Lock()
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self.last_poll = 0
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self.daemon = True
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self.exc = None
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self.output_path = output_path
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def run(self):
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self.logger.debug('Starting screen capture polling')
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try:
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while True:
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if self.stop_signal.is_set():
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break
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with self.lock:
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current_time = time.time()
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if (current_time - self.last_poll) >= self.period:
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self.poll()
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time.sleep(0.5)
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except Exception: # pylint: disable=W0703
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self.exc = WorkerThreadError(self.name, sys.exc_info())
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def stop(self):
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self.logger.debug('Stopping screen capture polling')
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self.stop_signal.set()
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self.join(self.timeout)
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if self.is_alive():
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self.logger.error('Could not join screen capture poller thread.')
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if self.exc:
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raise self.exc # pylint: disable=E0702
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def poll(self):
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self.last_poll = time.time()
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self.target.capture_screen(os.path.join(self.output_path, "screencap_{ts}.png"))
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class ScreenCaptureCollector(TraceCollector):
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def __init__(self, target, output_path=None, period=None):
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super(ScreenCaptureCollector, self).__init__(target)
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self._collecting = False
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self.output_path = output_path
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self.period = period
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self.target = target
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self._poller = ScreenCapturePoller(self.target, self.period,
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self.output_path)
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def reset(self):
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pass
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def start(self):
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"""
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Start collecting the screenshots
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"""
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self._poller.start()
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self._collecting = True
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def stop(self):
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"""
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Stop collecting the screenshots
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"""
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if not self._collecting:
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raise RuntimeError('Screen capture collector is not running, nothing to stop')
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self._poller.stop()
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self._collecting = False
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