Make sure the result is floating point in InitLowFrequencyCorrectionRanges.

webrtc/modules/audio_processing/beamformer/nonlinear_beamformer.cc

 /*
  *  Copyright (c) 2014 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 249 matching lines @@
 // applied as a constant value over the adjacent end "frequency correction"
 // regions.
 //
 //             low_mean_start_bin_     high_mean_start_bin_
 //                   v                         v              constant
 // |----------------|--------|----------------|-------|----------------|
 //   constant               ^                        ^
 //             low_mean_end_bin_       high_mean_end_bin_
 //
 void NonlinearBeamformer::InitLowFrequencyCorrectionRanges() {
-  low_mean_start_bin_ = Round(kLowMeanStartHz * kFftSize / sample_rate_hz_);
-  low_mean_end_bin_ = Round(kLowMeanEndHz * kFftSize / sample_rate_hz_);
+  low_mean_start_bin_ = Round(static_cast<float>(kLowMeanStartHz) *
+                                  kFftSize / sample_rate_hz_);
+  low_mean_end_bin_ = Round(static_cast<float>(kLowMeanEndHz) *
+                                  kFftSize / sample_rate_hz_);
 
   RTC_DCHECK_GT(low_mean_start_bin_, 0U);
   RTC_DCHECK_LT(low_mean_start_bin_, low_mean_end_bin_);
 }
 
 void NonlinearBeamformer::InitHighFrequencyCorrectionRanges() {
   const float kAliasingFreqHz =
       kSpeedOfSoundMeterSeconds /
       (min_mic_spacing_ * (1.f + std::abs(std::cos(target_angle_radians_))));
   const float kHighMeanStartHz = std::min(0.5f *  kAliasingFreqHz,
@@ skipping 306 matching lines @@
                    new_mask_ + high_mean_end_bin_ + 1);
   if (new_mask_[quantile] > kMaskTargetThreshold) {
     is_target_present_ = true;
     interference_blocks_count_ = 0;
   } else {
     is_target_present_ = interference_blocks_count_++ < hold_target_blocks_;
   }
 }
 
 }  // namespace webrtc