Changed AECM to be built using C++

webrtc/modules/audio_processing/aecm/aecm_core_neon.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/aecm/aecm_core.h"
 
 #include <arm_neon.h>
 #include <assert.h>
 
 #include "webrtc/common_audio/signal_processing/include/real_fft.h"
 
 // TODO(kma): Re-write the corresponding assembly file, the offset
 // generating script and makefile, to replace these C functions.
 
-// Square root of Hanning window in Q14.
-const ALIGN8_BEG int16_t WebRtcAecm_kSqrtHanning[] ALIGN8_END = {
-  0,
-  399, 798, 1196, 1594, 1990, 2386, 2780, 3172,
-  3562, 3951, 4337, 4720, 5101, 5478, 5853, 6224,
-  6591, 6954, 7313, 7668, 8019, 8364, 8705, 9040,
-  9370, 9695, 10013, 10326, 10633, 10933, 11227, 11514,
-  11795, 12068, 12335, 12594, 12845, 13089, 13325, 13553,
-  13773, 13985, 14189, 14384, 14571, 14749, 14918, 15079,
-  15231, 15373, 15506, 15631, 15746, 15851, 15947, 16034,
-  16111, 16179, 16237, 16286, 16325, 16354, 16373, 16384
-};
-
 static inline void AddLanes(uint32_t* ptr, uint32x4_t v) {
 #if defined(WEBRTC_ARCH_ARM64)
   *(ptr) = vaddvq_u32(v);
 #else
   uint32x2_t tmp_v;
   tmp_v = vadd_u32(vget_low_u32(v), vget_high_u32(v));
   tmp_v = vpadd_u32(tmp_v, tmp_v);
   *(ptr) = vget_lane_u32(tmp_v, 0);
 #endif
 }
@@ skipping 159 matching lines @@
     vst1q_s32(start_adapt32_p, adapt32_v_low);
     vst1q_s32(start_adapt32_p + 4, adapt32_v_high);
 
     start_stored_p += 8;
     start_adapt16_p += 8;
     start_adapt32_p += 8;
   }
   aecm->channelAdapt16[PART_LEN] = aecm->channelStored[PART_LEN];
   aecm->channelAdapt32[PART_LEN] = (int32_t)aecm->channelStored[PART_LEN] << 16;
 }