Add Windows, Mac, Android support to low bandwidth audio test

webrtc/audio/test/low_bandwidth_audio_test.py

 #!/usr/bin/env python
 # Copyright (c) 2017 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.
 
 """
 This script is the wrapper that runs the low-bandwidth audio test.
 
 After running the test, post-process steps for calculating audio quality of the
 output files will be performed.
 """
 
 import argparse
 import logging
 import os
 import re
+import shutil
 import subprocess
 import sys
 
 
 SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
 SRC_DIR = os.path.normpath(os.path.join(SCRIPT_DIR, os.pardir, os.pardir,
                                         os.pardir))
 
 
 def _LogCommand(command):
   logging.info('Running %r', command)
   return command
 
 
 def _ParseArgs():
   parser = argparse.ArgumentParser(description='Run low-bandwidth audio tests.')
   parser.add_argument('build_dir',
       help='Path to the build directory (e.g. out/Release).')
   parser.add_argument('--remove', action='store_true',
       help='Remove output audio files after testing.')
+  parser.add_argument('--android', action='store_true',
+      help='Perform the test on a connected Android device instead.')
+  parser.add_argument('--adb-path', help='Path to adb binary.', default='adb')
   args = parser.parse_args()
   return args
 
 
 def _GetPlatform():
   if sys.platform == 'win32':
     return 'win'
   elif sys.platform == 'darwin':
     return 'mac'
   elif sys.platform.startswith('linux'):
     return 'linux'
 
 
-def _GetExecutableExtension():
-  if sys.platform == 'win32':
-    return '.exe'
-  else:
-    return ''
-
-
 def _DownloadTools():
   tools_dir = os.path.join(SRC_DIR, 'tools-webrtc')
   toolchain_dir = os.path.join(tools_dir, 'audio_quality')
 
   # Download pesq.
   download_script = os.path.join(tools_dir, 'download_tools.py')
   command = [sys.executable, download_script, toolchain_dir]
   subprocess.check_call(_LogCommand(command))
 
-  pesq_path = os.path.join(toolchain_dir, _GetPlatform(),
-                           'pesq' + _GetExecutableExtension())
+  pesq_path = os.path.join(toolchain_dir, _GetPlatform(), 'pesq')
   return pesq_path
 
 
+def _GetFile(file_path, out_dir, android=False, adb_path=None):
+  out_file_name = os.path.basename(file_path)
+  out_file_path = os.path.join(out_dir, out_file_name)
+
+  if android:
+    # Pull the file from the connected Android device
+    adb_command = [adb_path, 'pull', file_path, out_dir]
+    subprocess.check_call(_LogCommand(adb_command))
+  elif os.path.abspath(file_path) != os.path.abspath(out_file_path):
+    shutil.copy(file_path, out_file_path)
+
+  return out_file_path
+
+
 def main():
   # pylint: disable=W0101
   logging.basicConfig(level=logging.INFO)
 
   args = _ParseArgs()
 
   pesq_path = _DownloadTools()
 
-  test_executable_path = os.path.join(args.build_dir,
-      'low_bandwidth_audio_test' + _GetExecutableExtension())
+  out_dir = os.path.join(args.build_dir, '..')
+  if args.android:
+    test_command = [os.path.join(args.build_dir, 'bin',
+                                 'run_low_bandwidth_audio_test'), '-v']
+  else:
+    test_command = [os.path.join(args.build_dir, 'low_bandwidth_audio_test')]
 
   # Start the test executable that produces audio files.
-  command = [test_executable_path]
-  test_process = subprocess.Popen(_LogCommand(command), stdout=subprocess.PIPE)
+  test_process = subprocess.Popen(_LogCommand(test_command),
+                                  stdout=subprocess.PIPE)
 
   for line in iter(test_process.stdout.readline, ''):
     # Echo the output to screen.
     sys.stdout.write(line)
 
     # Extract specific lines that contain information about produced files.
-    match = re.search(r'^TEST (\w+) ([^:]+?):([^:]+?)\n?$', line)
+    # Output from Android has a prefix, need to skip it.
+    match = re.search(r'^(?:I\b.+\b)?TEST (\w+) ([^ ]+?) ([^ ]+?)\s*$', line)
     if not match:
       continue
-    test_name, reference_file, degraded_file = match.groups()
+    test_name = match.group(1)
+    reference_file = _GetFile(match.group(2), out_dir,
+                              args.android, args.adb_path)
+    degraded_file = _GetFile(match.group(3), out_dir,
+                             args.android, args.adb_path)
 
-    # Analyze audio
-    command = [pesq_path, '+16000', reference_file, degraded_file]
-    pesq_output = subprocess.check_output(_LogCommand(command))
-
-    if args.remove:
-      os.remove(degraded_file)
+    # Analyze audio.
+    pesq_command = [pesq_path, '+16000',
+                    os.path.basename(reference_file),
+                    os.path.basename(degraded_file)]
+    # Need to provide paths in the current directory due to a bug in PESQ:
+    # On Mac, for some 'path/to/file.wav', if 'file.wav' is longer than
+    # 'path/to', PESQ crashes.
+    pesq_output = subprocess.check_output(_LogCommand(pesq_command),
+                                          cwd=out_dir)
 
     # Find the scores in stdout of pesq.
     match = re.search(
         r'Prediction \(Raw MOS, MOS-LQO\):\s+=\s+([\d.]+)\s+([\d.]+)',
         pesq_output)
     if match:
       raw_mos, _ = match.groups()
 
       # Output a result for the perf dashboard.
       print 'RESULT pesq_mos: %s= %s score' % (test_name, raw_mos)
     else:
       logging.error('PESQ: %s', pesq_output.splitlines()[-1])
 
+    if args.remove:
+      os.remove(reference_file)
+      os.remove(degraded_file)
+
   return test_process.wait()
 
 
 if __name__ == '__main__':
   sys.exit(main())