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| 1 # Copyright 2013 The Chromium Authors. All rights reserved. |
| 2 # Use of this source code is governed by a BSD-style license that can be |
| 3 # found in the LICENSE file. |
| 4 |
| 5 import logging |
| 6 import os |
| 7 import tempfile |
| 8 import time |
| 9 |
| 10 from pylib import cmd_helper |
| 11 from pylib import device_signal |
| 12 from pylib.device import device_errors |
| 13 |
| 14 # TODO(jbudorick) Remove once telemetry gets switched over. |
| 15 import pylib.android_commands |
| 16 import pylib.device.device_utils |
| 17 |
| 18 |
| 19 class VideoRecorder(object): |
| 20 """Records a screen capture video from an Android Device (KitKat or newer). |
| 21 |
| 22 Args: |
| 23 device: DeviceUtils instance. |
| 24 host_file: Path to the video file to store on the host. |
| 25 megabits_per_second: Video bitrate in megabits per second. Allowed range |
| 26 from 0.1 to 100 mbps. |
| 27 size: Video frame size tuple (width, height) or None to use the device |
| 28 default. |
| 29 rotate: If True, the video will be rotated 90 degrees. |
| 30 """ |
| 31 def __init__(self, device, megabits_per_second=4, size=None, |
| 32 rotate=False): |
| 33 # TODO(jbudorick) Remove once telemetry gets switched over. |
| 34 if isinstance(device, pylib.android_commands.AndroidCommands): |
| 35 device = pylib.device.device_utils.DeviceUtils(device) |
| 36 self._device = device |
| 37 self._device_file = ( |
| 38 '%s/screen-recording.mp4' % device.GetExternalStoragePath()) |
| 39 self._recorder = None |
| 40 self._recorder_stdout = None |
| 41 self._is_started = False |
| 42 |
| 43 self._args = ['adb'] |
| 44 if str(self._device): |
| 45 self._args += ['-s', str(self._device)] |
| 46 self._args += ['shell', 'screenrecord', '--verbose'] |
| 47 self._args += ['--bit-rate', str(megabits_per_second * 1000 * 1000)] |
| 48 if size: |
| 49 self._args += ['--size', '%dx%d' % size] |
| 50 if rotate: |
| 51 self._args += ['--rotate'] |
| 52 self._args += [self._device_file] |
| 53 |
| 54 def Start(self): |
| 55 """Start recording video.""" |
| 56 self._recorder_stdout = tempfile.mkstemp()[1] |
| 57 self._recorder = cmd_helper.Popen( |
| 58 self._args, stdout=open(self._recorder_stdout, 'w')) |
| 59 if not self._device.GetPids('screenrecord'): |
| 60 raise RuntimeError('Recording failed. Is your device running Android ' |
| 61 'KitKat or later?') |
| 62 |
| 63 def IsStarted(self): |
| 64 if not self._is_started: |
| 65 for line in open(self._recorder_stdout): |
| 66 self._is_started = line.startswith('Content area is ') |
| 67 if self._is_started: |
| 68 break |
| 69 return self._is_started |
| 70 |
| 71 def Stop(self): |
| 72 """Stop recording video.""" |
| 73 os.remove(self._recorder_stdout) |
| 74 self._is_started = False |
| 75 if not self._recorder: |
| 76 return |
| 77 if not self._device.KillAll('screenrecord', signum=device_signal.SIGINT, |
| 78 quiet=True): |
| 79 logging.warning('Nothing to kill: screenrecord was not running') |
| 80 self._recorder.wait() |
| 81 |
| 82 def Pull(self, host_file=None): |
| 83 """Pull resulting video file from the device. |
| 84 |
| 85 Args: |
| 86 host_file: Path to the video file to store on the host. |
| 87 Returns: |
| 88 Output video file name on the host. |
| 89 """ |
| 90 # TODO(jbudorick): Merge filename generation with the logic for doing so in |
| 91 # DeviceUtils. |
| 92 host_file_name = ( |
| 93 host_file |
| 94 or 'screen-recording-%s.mp4' % time.strftime('%Y%m%dT%H%M%S', |
| 95 time.localtime())) |
| 96 host_file_name = os.path.abspath(host_file_name) |
| 97 self._device.PullFile(self._device_file, host_file_name) |
| 98 self._device.RunShellCommand('rm -f "%s"' % self._device_file) |
| 99 return host_file_name |
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