| #!/usr/bin/env python |
| # Copyright (c) 2013 The WebRTC project authors. All Rights Reserved. |
| # |
| # Use of this source code is governed by a BSD-style license |
| # that can be found in the LICENSE file in the root of the source |
| # tree. An additional intellectual property rights grant can be found |
| # in the file PATENTS. All contributing project authors may |
| # be found in the AUTHORS file in the root of the source tree. |
| |
| """Checks if a virtual webcam is running and starts it if not. |
| |
| Returns a non-zero return code if the webcam could not be started. |
| |
| Prerequisites: |
| * Python must have the psutil package installed. |
| * Windows: a scheduled task named 'ManyCam' must exist and be configured to |
| launch ManyCam preconfigured to auto-play the test clip. |
| * Mac: ManyCam must be installed in the default location and be preconfigured |
| to auto-play the test clip. |
| * Linux: The v4l2loopback must be loaded to the kernel already (with the |
| devices=2 argument) and the v4l2_file_player application must be compiled and |
| put in the location specified below. |
| """ |
| |
| import psutil |
| import subprocess |
| import sys |
| |
| |
| WEBCAM_WIN = ['schtasks', '/run', '/tn', 'ManyCam'] |
| WEBCAM_MAC = ['open', '/Applications/ManyCam/ManyCam.app'] |
| WEBCAM_LINUX = ( |
| '$HOME/fake-webcam-driver/linux/v4l2_file_player/v4l2_file_player ' |
| '$HOME/webrtc_video_quality/reference_video.yuv 640 480 /dev/video1 &') |
| |
| |
| def IsWebCamRunning(): |
| if sys.platform == 'win32': |
| process_name = 'ManyCam.exe' |
| elif sys.platform.startswith('darwin'): |
| process_name = 'ManyCam' |
| elif sys.platform.startswith('linux'): |
| process_name = 'v4l2_file_player' |
| else: |
| raise Exception('Unsupported platform: %s' % sys.platform) |
| for p in psutil.get_process_list(): |
| if process_name == p.name: |
| print 'Found a running virtual webcam (%s with PID %s)' % (p.name, p.pid) |
| return True |
| return False |
| |
| |
| def Main(): |
| if IsWebCamRunning(): |
| return 0 |
| |
| try: |
| if sys.platform == 'win32': |
| subprocess.check_call(WEBCAM_WIN) |
| elif sys.platform.startswith('darwin'): |
| subprocess.check_call(WEBCAM_MAC) |
| elif sys.platform.startswith('linux'): |
| subprocess.check_call(WEBCAM_LINUX, shell=True) |
| |
| print 'Successfully launched virtual webcam.' |
| return 0 |
| |
| except Exception as e: |
| print 'Failed to launch virtual webcam: %s' % e |
| |
| |
| if __name__ == '__main__': |
| sys.exit(Main()) |