Update video_quality_analysis to align videos instead of using barcodes

This CL is a follow-up to the previous CL
https://webrtc-review.googlesource.com/c/src/+/94773 that added generic
logic for aligning videos. This will allow us to easily extend
video_quality_analysis with new sophisticated video quality metrics.
Also, we can use any kind of video that does not necessarily need to
contain bar codes. Removing the need to decode barcodes also leads to a
big speedup for the tests.

Bug: webrtc:9642
Change-Id: I74b0d630b3e1ed44781ad024115ded3143e28f50
Reviewed-on: https://webrtc-review.googlesource.com/94845
Reviewed-by: Paulina Hensman <phensman@webrtc.org>
Reviewed-by: Patrik Höglund <phoglund@webrtc.org>
Commit-Queue: Magnus Jedvert <magjed@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24423}

rtc_tools/barcode_tools/helper_functions.py

@@ -1,105 +0,0 @@
-#!/usr/bin/env python
-# Copyright (c) 2012 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.
-
-import multiprocessing
-import os
-import subprocess
-import sys
-
-_DEFAULT_PADDING = 4
-
-
-class HelperError(Exception):
-  """Exception raised for errors in the helper."""
-  pass
-
-
-def ZeroPad(number, padding=_DEFAULT_PADDING):
-  """Converts an int into a zero padded string.
-
-  Args:
-    number(int): The number to convert.
-    padding(int): The number of chars in the output. Note that if you pass for
-      example number=23456 and padding=4, the output will still be '23456',
-      i.e. it will not be cropped. If you pass number=2 and padding=4, the
-      return value will be '0002'.
-  Return:
-    (string): The zero padded number converted to string.
-  """
-  return str(number).zfill(padding)
-
-
-def RunShellCommand(cmd_list, fail_msg=None):
-  """Executes a command.
-
-  Args:
-    cmd_list(list): Command list to execute.
-    fail_msg(string): Message describing the error in case the command fails.
-
-  Return:
-    (string): The standard output from running the command.
-
-  Raise:
-    HelperError: If command fails.
-  """
-  process = subprocess.Popen(cmd_list, stdout=subprocess.PIPE,
-                             stderr=subprocess.PIPE)
-  output, error = process.communicate()
-  if process.returncode != 0:
-    if fail_msg:
-      print >> sys.stderr, fail_msg
-    raise HelperError('Failed to run %s: command returned %d and printed '
-                      '%s and %s' % (' '.join(cmd_list), process.returncode,
-                                     output, error))
-  return output.strip()
-
-
-def PerformActionOnAllFiles(directory, file_pattern, file_extension,
-                            start_number, action, **kwargs):
-  """Function that performs a given action on all files matching a pattern.
-
-  It is assumed that the files are named file_patternxxxx.file_extension, where
-  xxxx are digits starting from start_number.
-
-  Args:
-    directory(string): The directory where the files live.
-    file_pattern(string): The name pattern of the files.
-    file_extension(string): The files' extension.
-    start_number(int): From where to start to count frames.
-    action(function): The action to be performed over the files. Must return
-        False if the action failed, True otherwise. It should take a file name
-        as the first argument and **kwargs as arguments. The function must be
-        possible to pickle, so it cannot be a bound function (for instance).
-
-  Return:
-    (bool): Whether performing the action over all files was successful or not.
-  """
-  file_prefix = os.path.join(directory, file_pattern)
-  file_number = start_number
-
-  process_pool = multiprocessing.Pool(processes=multiprocessing.cpu_count())
-  results = []
-  while True:
-    zero_padded_file_number = ZeroPad(file_number)
-    file_name = file_prefix + zero_padded_file_number + '.' + file_extension
-    if not os.path.isfile(file_name):
-      break
-    future = process_pool.apply_async(action, args=(file_name,), kwds=kwargs)
-    results.append(future)
-    file_number += 1
-
-  successful = True
-  for result in results:
-    if not result.get():
-      print "At least one action %s failed for files %sxxxx.%s." % (
-          action, file_pattern, file_extension)
-      successful = False
-
-  process_pool.close()
-  return successful