Pull the Voice Activity Detector out from the AGC

webrtc/modules/audio_processing/agc/pitch_based_vad_unittest.cc

-/*
- *  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.
- */
-
-#include "webrtc/modules/audio_processing/agc/pitch_based_vad.h"
-
-#include <math.h>
-#include <stdio.h>
-#include <string.h>
-
-#include "gtest/gtest.h"
-#include "webrtc/test/testsupport/fileutils.h"
-
-namespace webrtc {
-
-TEST(PitchBasedVadTest, VoicingProbabilityTest) {
-  std::string spectral_peak_file_name = test::ResourcePath(
-      "audio_processing/agc/agc_spectral_peak", "dat");
-  FILE* spectral_peak_file = fopen(spectral_peak_file_name.c_str(), "rb");
-  ASSERT_TRUE(spectral_peak_file != NULL);
-
-  std::string pitch_gain_file_name =
-      test::ResourcePath("audio_processing/agc/agc_pitch_gain", "dat");
-  FILE* pitch_gain_file = fopen(pitch_gain_file_name.c_str(), "rb");
-  ASSERT_TRUE(pitch_gain_file != NULL);
-
-  std::string pitch_lag_file_name =
-      test::ResourcePath("audio_processing/agc/agc_pitch_lag", "dat");
-  FILE* pitch_lag_file = fopen(pitch_lag_file_name.c_str(), "rb");
-  ASSERT_TRUE(pitch_lag_file != NULL);
-
-  std::string voicing_prob_file_name =
-      test::ResourcePath("audio_processing/agc/agc_voicing_prob", "dat");
-  FILE* voicing_prob_file = fopen(voicing_prob_file_name.c_str(), "rb");
-  ASSERT_TRUE(voicing_prob_file != NULL);
-
-  PitchBasedVad vad_;
-
-  double reference_activity_probability;
-
-  AudioFeatures audio_features;
-  memset(&audio_features, 0, sizeof(audio_features));
-  audio_features.num_frames = 1;
-  while (fread(audio_features.spectral_peak,
-               sizeof(audio_features.spectral_peak[0]), 1,
-               spectral_peak_file) == 1u) {
-    double p;
-    ASSERT_EQ(1u, fread(audio_features.log_pitch_gain, sizeof(
-        audio_features.log_pitch_gain[0]), 1, pitch_gain_file));
-    ASSERT_EQ(1u, fread(audio_features.pitch_lag_hz, sizeof(
-        audio_features.pitch_lag_hz[0]), 1, pitch_lag_file));
-    ASSERT_EQ(1u, fread(&reference_activity_probability, sizeof(
-        reference_activity_probability), 1, voicing_prob_file));
-
-    p = 0.5;  // Initialize to the neutral value for combining probabilities.
-    EXPECT_EQ(0, vad_.VoicingProbability(audio_features, &p));
-    EXPECT_NEAR(p, reference_activity_probability, 0.01);
-  }
-
-  fclose(spectral_peak_file);
-  fclose(pitch_gain_file);
-  fclose(pitch_lag_file);
-}
-
-}  // namespace webrtc