Added support in the AEC for refined filter adaptation.

webrtc/modules/audio_processing/aec/aec_core_neon.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 110 matching lines @@
   // Note: The precision did not improve after 2 iterations.
   for (i = 0; i < 2; i++) {
     x = vmulq_f32(vrsqrtsq_f32(vmulq_f32(x, x), s), x);
   }
   // sqrt(s) = s * 1/sqrt(s)
   return vmulq_f32(s, x);
 }
 #endif  // WEBRTC_ARCH_ARM64
 
 static void ScaleErrorSignalNEON(int extended_filter_enabled,
-                                 float normal_mu,
+                                 float mu,
                                  float normal_error_threshold,
                                  float x_pow[PART_LEN1],
                                  float ef[2][PART_LEN1]) {

[tlegrand-webrtc, 2016/04/14 14:32:42]

Same comments as for the main function.

[peah-webrtc, 2016/04/14 22:12:41]

Done.

-  const float mu = extended_filter_enabled ? kExtendedMu : normal_mu;
   const float error_threshold = extended_filter_enabled
                                     ? kExtendedErrorThreshold
                                     : normal_error_threshold;
   const float32x4_t k1e_10f = vdupq_n_f32(1e-10f);
   const float32x4_t kMu = vmovq_n_f32(mu);
   const float32x4_t kThresh = vmovq_n_f32(error_threshold);
   int i;
   // vectorized code (four at once)
   for (i = 0; i + 3 < PART_LEN1; i += 4) {
     const float32x4_t x_pow_local = vld1q_f32(&x_pow[i]);
@@ skipping 576 matching lines @@
   WebRtcAec_FilterFar = FilterFarNEON;
   WebRtcAec_ScaleErrorSignal = ScaleErrorSignalNEON;
   WebRtcAec_FilterAdaptation = FilterAdaptationNEON;
   WebRtcAec_OverdriveAndSuppress = OverdriveAndSuppressNEON;
   WebRtcAec_SubbandCoherence = SubbandCoherenceNEON;
   WebRtcAec_StoreAsComplex = StoreAsComplexNEON;
   WebRtcAec_PartitionDelay = PartitionDelayNEON;
   WebRtcAec_WindowData = WindowDataNEON;
 }
 }  // namespace webrtc