/*
 *  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/vad/pitch_based_vad.h"

#include <math.h>
#include <stdio.h>

#include <string>

#include "testing/gtest/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