APM QA refactoring: render stream support, echo path simulation, new export engine

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

Index: webrtc/modules/audio_processing/test/py_quality_assessment/quality_assessment/test_data_generation_factory.py
diff --git a/webrtc/modules/audio_processing/test/py_quality_assessment/quality_assessment/test_data_generation_factory.py b/webrtc/modules/audio_processing/test/py_quality_assessment/quality_assessment/test_data_generation_factory.py
index b5193f2cc5503d99adc3e235962b165a084dfe0a..0d5a9c50be20144711247b484a7103fa19c2968d 100644
--- a/webrtc/modules/audio_processing/test/py_quality_assessment/quality_assessment/test_data_generation_factory.py
+++ b/webrtc/modules/audio_processing/test/py_quality_assessment/quality_assessment/test_data_generation_factory.py
@@ -21,7 +21,8 @@ class TestDataGeneratorFactory(object):
   generators will be produced.
   """
 
-  def __init__(self, aechen_ir_database_path):
+  def __init__(self, output_directory_prefix, aechen_ir_database_path):
+    self._output_directory_prefix = output_directory_prefix
     self._aechen_ir_database_path = aechen_ir_database_path
 
   def GetInstance(self, test_data_generators_class):
@@ -35,7 +36,6 @@ class TestDataGeneratorFactory(object):
     if test_data_generators_class == (
         test_data_generation.ReverberationTestDataGenerator):
       return test_data_generation.ReverberationTestDataGenerator(
-          self._aechen_ir_database_path)
+          self._output_directory_prefix, self._aechen_ir_database_path)
     else:
-      # By default, no arguments in the constructor.
-      return test_data_generators_class()
+      return test_data_generators_class(self._output_directory_prefix)