APM QA unit tests, fake POLQA binary and minor fixes

webrtc/modules/audio_processing/test/py_quality_assessment/quality_assessment/fake_polqa.cc

Index: webrtc/modules/audio_processing/test/py_quality_assessment/quality_assessment/fake_polqa.cc
diff --git a/webrtc/modules/audio_processing/test/py_quality_assessment/quality_assessment/fake_polqa.cc b/webrtc/modules/audio_processing/test/py_quality_assessment/quality_assessment/fake_polqa.cc
new file mode 100644
index 0000000000000000000000000000000000000000..d15c5223d0420de785931c12cec55783854929b6
--- /dev/null
+++ b/webrtc/modules/audio_processing/test/py_quality_assessment/quality_assessment/fake_polqa.cc
@@ -0,0 +1,54 @@
+/*
+ *  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.
+ */
+
+#include <fstream>
+#include <iostream>
+
+#include "webrtc/base/checks.h"
+
+namespace webrtc {
+namespace test {
+namespace {
+
+const char* const kErrorMessage = "-Out /path/to/output/file is mandatory";
+
+// Writes fake output intended to be parsed by
+// quality_assessment.eval_scores.PolqaScore.
+void WriteOutputFile(const std::string& output_file_path) {
+  RTC_CHECK_NE(output_file_path, "");
+  std::ofstream out(output_file_path);
+  RTC_CHECK(!out.bad());
+  out << "* Fake Polqa output" << std::endl;
+  out << "FakeField1\tPolqaScore\tFakeField2" << std::endl;
+  out << "FakeValue1\t3.25\tFakeValue2" << std::endl;
+  out.close();
+}
+
+}  // namespace
+
+int main(int argc, char* argv[]) {
+  // Find "-Out" and use its next argument as output file path.
+  RTC_CHECK_GE(argc, 3) << kErrorMessage;
+  const std::string kSoughtFlagName = "-Out";
+  for (int i = 1; i < argc - 1; ++i) {
+    if (kSoughtFlagName.compare(argv[i]) == 0) {
+      WriteOutputFile(argv[i + 1]);
+      return 0;
+    }
+  }
+  FATAL() << kErrorMessage;
+}
+
+}  // namespace test
+}  // namespace webrtc
+
+int main(int argc, char* argv[]) {
+  return webrtc::test::main(argc, argv);
+}