Moving FFT on farend signal to where it is used in AEC (bit exact).

webrtc/modules/audio_processing/aec/aec_core_internal.h

 /*
  *  Copyright (c) 2013 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 77 matching lines @@
   float overDrive, overDriveSm;
   int nlp_mode;
   float outBuf[PART_LEN];
   int delayIdx;
 
   short stNearState, echoState;
   short divergeState;
 
   int xfBufBlockPos;
 
-  RingBuffer* far_buf;
-  RingBuffer* far_buf_windowed;
+  RingBuffer* far_time_buf;
+
   int system_delay;  // Current system delay buffered in AEC.
 
   int mult;  // sampling frequency multiple
   int sampFreq;
   size_t num_bands;
   uint32_t seed;
 
   float normal_mu;               // stepsize
   float normal_error_threshold;  // error threshold
 
@@ skipping 48 matching lines @@
 
 #ifdef WEBRTC_AEC_DEBUG_DUMP
   // Sequence number of this AEC instance, so that different instances can
   // choose different dump file names.
   int instance_index;
 
   // Number of times we've restarted dumping; used to pick new dump file names
   // each time.
   int debug_dump_count;
 
-  RingBuffer* far_time_buf;
   rtc_WavWriter* farFile;
   rtc_WavWriter* nearFile;
   rtc_WavWriter* outFile;
   rtc_WavWriter* outLinearFile;
   FILE* e_fft_file;
 #endif
 };
 
 typedef void (*WebRtcAecFilterFar)(
     int num_partitions,
@@ skipping 42 matching lines @@
 extern WebRtcAecPartitionDelay WebRtcAec_PartitionDelay;
 
 typedef void (*WebRtcAecStoreAsComplex)(const float* data,
                                         float data_complex[2][PART_LEN1]);
 extern WebRtcAecStoreAsComplex WebRtcAec_StoreAsComplex;
 
 typedef void (*WebRtcAecWindowData)(float* x_windowed, const float* x);
 extern WebRtcAecWindowData WebRtcAec_WindowData;
 
 #endif  // WEBRTC_MODULES_AUDIO_PROCESSING_AEC_AEC_CORE_INTERNAL_H_