text: /*
   *  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.
   */
  
  
  /*
   * This file contains implementations of the iLBC specific functions
   * WebRtcSpl_ReverseOrderMultArrayElements()
   * WebRtcSpl_ElementwiseVectorMult()
   * WebRtcSpl_AddVectorsAndShift()
   * WebRtcSpl_AddAffineVectorToVector()
   * WebRtcSpl_AffineTransformVector()
   *
   */
  
  #include "common_audio/signal_processing/include/signal_processing_library.h"
  
  void WebRtcSpl_ReverseOrderMultArrayElements(int16_t *out, const int16_t *in,
                                               const int16_t *win,
                                               size_t vector_length,
                                               int16_t right_shifts)
  {
      size_t i;
      int16_t *outptr = out;
      const int16_t *inptr = in;
      const int16_t *winptr = win;
      for (i = 0; i < vector_length; i++)
      {
        *outptr++ = (int16_t)((*inptr++ * *winptr--) >> right_shifts);
      }
  }
  
  void WebRtcSpl_ElementwiseVectorMult(int16_t *out, const int16_t *in,
                                       const int16_t *win, size_t vector_length,
                                       int16_t right_shifts)
  {
      size_t i;
      int16_t *outptr = out;
      const int16_t *inptr = in;
      const int16_t *winptr = win;
      for (i = 0; i < vector_length; i++)
      {
        *outptr++ = (int16_t)((*inptr++ * *winptr++) >> right_shifts);
      }
  }
  
  void WebRtcSpl_AddVectorsAndShift(int16_t *out, const int16_t *in1,
                                    const int16_t *in2, size_t vector_length,
                                    int16_t right_shifts)
  {
      size_t i;
      int16_t *outptr = out;
      const int16_t *in1ptr = in1;
      const int16_t *in2ptr = in2;
      for (i = vector_length; i > 0; i--)
      {
          (*outptr++) = (int16_t)(((*in1ptr++) + (*in2ptr++)) >> right_shifts);
      }
  }
  
  void WebRtcSpl_AddAffineVectorToVector(int16_t *out, int16_t *in,
                                         int16_t gain, int32_t add_constant,
                                         int16_t right_shifts,
                                         size_t vector_length)
  {
      size_t i;
  
      for (i = 0; i < vector_length; i++)
      {
        out[i] += (int16_t)((in[i] * gain + add_constant) >> right_shifts);
      }
  }
  
  void WebRtcSpl_AffineTransformVector(int16_t *out, int16_t *in,
                                       int16_t gain, int32_t add_constant,
                                       int16_t right_shifts, size_t vector_length)
  {
      size_t i;
  
      for (i = 0; i < vector_length; i++)
      {
        out[i] = (int16_t)((in[i] * gain + add_constant) >> right_shifts);
      }
  }
  