text: /*
   *  Copyright (c) 2011 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.
   */
  
  /******************************************************************
  
   iLBC Speech Coder ANSI-C Source Code
  
   WebRtcIlbcfix_FilteredCbVecs.c
  
  ******************************************************************/
  
  #include BOSS_WEBRTC_U_modules__audio_coding__codecs__ilbc__defines_h //original-code:"modules/audio_coding/codecs/ilbc/defines.h"
  #include BOSS_WEBRTC_U_modules__audio_coding__codecs__ilbc__constants_h //original-code:"modules/audio_coding/codecs/ilbc/constants.h"
  
  /*----------------------------------------------------------------*
   *  Construct an additional codebook vector by filtering the
   *  initial codebook buffer. This vector is then used to expand
   *  the codebook with an additional section.
   *---------------------------------------------------------------*/
  
  void WebRtcIlbcfix_FilteredCbVecs(
      int16_t *cbvectors, /* (o) Codebook vector for the higher section */
      int16_t *CBmem,  /* (i) Codebook memory that is filtered to create a
                                             second CB section */
      size_t lMem,  /* (i) Length of codebook memory */
      size_t samples    /* (i) Number of samples to filter */
                                    ) {
  
    /* Set up the memory, start with zero state */
    WebRtcSpl_MemSetW16(CBmem+lMem, 0, CB_HALFFILTERLEN);
    WebRtcSpl_MemSetW16(CBmem-CB_HALFFILTERLEN, 0, CB_HALFFILTERLEN);
    WebRtcSpl_MemSetW16(cbvectors, 0, lMem-samples);
  
    /* Filter to obtain the filtered CB memory */
  
    WebRtcSpl_FilterMAFastQ12(
        CBmem+CB_HALFFILTERLEN+lMem-samples, cbvectors+lMem-samples,
        (int16_t*)WebRtcIlbcfix_kCbFiltersRev, CB_FILTERLEN, samples);
  
    return;
  }
  