APM Quality Assessment, simulation controller and libraries

webrtc/modules/audio_processing/test/py_quality_assessment/quality_assessment/noise_generation.py

Index: webrtc/modules/audio_processing/test/py_quality_assessment/quality_assessment/noise_generation.py
diff --git a/webrtc/modules/audio_processing/test/py_quality_assessment/quality_assessment/noise_generation.py b/webrtc/modules/audio_processing/test/py_quality_assessment/quality_assessment/noise_generation.py
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+# 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.
+
+class NoiseGenerator(object):
+
+  NAME = None
+  REGISTERED_CLASSES = {}
+
+  def __init__(self):
+    pass
+
+  @classmethod
+  def register_class(cls, class_to_register):
+    """
+    Decorator to automatically register the classes that extend NoiseGenerator.
+    """
+    cls.REGISTERED_CLASSES[class_to_register.NAME] = class_to_register
+
+
+# Identity generator.
+@NoiseGenerator.register_class
+class IdentityGenerator(NoiseGenerator):
+  """
+  Generator that adds no noise, therefore both the noisy and the reference
+  signals are the input signal.
+  """
+
+  NAME = 'identity'
+
+  def __init__(self):
+    super(IdentityGenerator, self).__init__()
+
+
+@NoiseGenerator.register_class
+class WhiteNoiseGenerator(NoiseGenerator):
+  """
+  Additive white noise generator.
+  """
+
+  NAME = 'white'
+
+  def __init__(self):
+    super(WhiteNoiseGenerator, self).__init__()
+
+
+@NoiseGenerator.register_class
+class NarrowBandNoiseGenerator(NoiseGenerator):
+  """
+  Additive narrow-band noise generator.
+  """
+
+  NAME = 'narrow_band'
+
+  def __init__(self):
+    super(NarrowBandNoiseGenerator, self).__init__()
+
+
+@NoiseGenerator.register_class
+class EnvironmentalNoiseGenerator(NoiseGenerator):
+  """
+  Additive environmental noise generator.
+  """
+
+  NAME = 'environmental'
+
+  def __init__(self):
+    super(EnvironmentalNoiseGenerator, self).__init__()
+
+
+@NoiseGenerator.register_class
+class EchoNoiseGenerator(NoiseGenerator):
+  """
+  Echo noise generator.
+  """
+
+  NAME = 'echo'
+
+  def __init__(self):
+    super(EchoNoiseGenerator, self).__init__()