Replaced the data logging functionality in the AEC with a generic logging functionality

webrtc/modules/audio_processing/aec/echo_cancellation_internal.h

 /*
  *  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.
  */
 
 #ifndef WEBRTC_MODULES_AUDIO_PROCESSING_AEC_ECHO_CANCELLATION_INTERNAL_H_
 #define WEBRTC_MODULES_AUDIO_PROCESSING_AEC_ECHO_CANCELLATION_INTERNAL_H_
 
 extern "C" {
 #include "webrtc/common_audio/ring_buffer.h"
 }
 #include "webrtc/modules/audio_processing/aec/aec_core.h"
 
 namespace webrtc {
 
-typedef struct {
+typedef struct Aec {
   int delayCtr;
   int sampFreq;
   int splitSampFreq;
   int scSampFreq;
   float sampFactor;  // scSampRate / sampFreq
   short skewMode;
   int bufSizeStart;
   int knownDelay;
   int rate_factor;
 
   short initFlag;  // indicates if AEC has been initialized
 
   // Variables used for averaging far end buffer size
   short counter;
   int sum;
   short firstVal;
   short checkBufSizeCtr;
 
   // Variables used for delay shifts
   short msInSndCardBuf;
   short filtDelay;  // Filtered delay estimate.
   int timeForDelayChange;
   int startup_phase;
   int checkBuffSize;
   short lastDelayDiff;
 
-#ifdef WEBRTC_AEC_DEBUG_DUMP
+#if WEBRTC_AEC_DEBUG_DUMP
   FILE* bufFile;
   FILE* delayFile;
   FILE* skewFile;
 #endif
 
   // Structures
   void* resampler;
 
   int skewFrCtr;
   int resample;  // if the skew is small enough we don't resample
   int highSkewCtr;
   float skew;
 
   RingBuffer* far_pre_buf;  // Time domain far-end pre-buffer.
 
   int farend_started;
 
+  // Aec instance counter.
+  static int instance_count;
   AecCore* aec;
 } Aec;
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_PROCESSING_AEC_ECHO_CANCELLATION_INTERNAL_H_