Fix the stereo support in IntelligibilityEnhancer

webrtc/modules/audio_processing/intelligibility/intelligibility_utils_unittest.cc

 /*
  *  Copyright (c) 2015 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.
  */
 
@@ skipping 25 matching lines @@
 TEST(IntelligibilityUtilsTest, TestPowerEstimator) {
   const size_t kFreqs = 10;
   const size_t kSamples = 100;
   const float kDecay = 0.5f;
   const std::vector<std::vector<std::complex<float>>> test_data(
       GenerateTestData(kFreqs, kSamples));
   PowerEstimator<std::complex<float>> power_estimator(kFreqs, kDecay);
   EXPECT_EQ(0, power_estimator.power()[0]);
 
   // Makes sure Step is doing something.
-  power_estimator.Step(&test_data[0][0]);
+  power_estimator.Step(test_data[0].data());
   for (size_t i = 1; i < kSamples; ++i) {
-    power_estimator.Step(&test_data[i][0]);
+    power_estimator.Step(test_data[i].data());
     for (size_t j = 0; j < kFreqs; ++j) {
       EXPECT_GE(power_estimator.power()[j], 0.f);
       EXPECT_LE(power_estimator.power()[j], 1.f);
     }
   }
 }
 
 // Tests gain applier.
 TEST(IntelligibilityUtilsTest, TestGainApplier) {
   const size_t kFreqs = 10;
   const size_t kSamples = 100;
   const float kChangeLimit = 0.1f;
   GainApplier gain_applier(kFreqs, kChangeLimit);
   const std::vector<std::vector<std::complex<float>>> in_data(
       GenerateTestData(kFreqs, kSamples));
   std::vector<std::vector<std::complex<float>>> out_data(
       GenerateTestData(kFreqs, kSamples));
   for (size_t i = 0; i < kSamples; ++i) {
-    gain_applier.Apply(&in_data[i][0], &out_data[i][0]);
+    gain_applier.Apply(in_data[i].data(), out_data[i].data());
     for (size_t j = 0; j < kFreqs; ++j) {
       EXPECT_GT(out_data[i][j].real(), 0.f);
       EXPECT_LT(out_data[i][j].real(), 1.f);
       EXPECT_GT(out_data[i][j].imag(), 0.f);
       EXPECT_LT(out_data[i][j].imag(), 1.f);
     }
   }
 }
 
 }  // namespace intelligibility
 
 }  // namespace webrtc