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      1 /*
      2  *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
      3  *
      4  *  Use of this source code is governed by a BSD-style license
      5  *  that can be found in the LICENSE file in the root of the source
      6  *  tree. An additional intellectual property rights grant can be found
      7  *  in the file PATENTS.  All contributing project authors may
      8  *  be found in the AUTHORS file in the root of the source tree.
      9  */
     10 
     11 
     12 /*
     13  * This file contains the implementation of functions
     14  * WebRtcSpl_MemSetW16()
     15  * WebRtcSpl_MemSetW32()
     16  * WebRtcSpl_MemCpyReversedOrder()
     17  * WebRtcSpl_CopyFromEndW16()
     18  * WebRtcSpl_ZerosArrayW16()
     19  * WebRtcSpl_ZerosArrayW32()
     20  *
     21  * The description header can be found in signal_processing_library.h
     22  *
     23  */
     24 
     25 #include <string.h>
     26 #include "webrtc/common_audio/signal_processing/include/signal_processing_library.h"
     27 
     28 
     29 void WebRtcSpl_MemSetW16(int16_t *ptr, int16_t set_value, int length)
     30 {
     31     int j;
     32     int16_t *arrptr = ptr;
     33 
     34     for (j = length; j > 0; j--)
     35     {
     36         *arrptr++ = set_value;
     37     }
     38 }
     39 
     40 void WebRtcSpl_MemSetW32(int32_t *ptr, int32_t set_value, int length)
     41 {
     42     int j;
     43     int32_t *arrptr = ptr;
     44 
     45     for (j = length; j > 0; j--)
     46     {
     47         *arrptr++ = set_value;
     48     }
     49 }
     50 
     51 void WebRtcSpl_MemCpyReversedOrder(int16_t* dest, int16_t* source, int length)
     52 {
     53     int j;
     54     int16_t* destPtr = dest;
     55     int16_t* sourcePtr = source;
     56 
     57     for (j = 0; j < length; j++)
     58     {
     59         *destPtr-- = *sourcePtr++;
     60     }
     61 }
     62 
     63 void WebRtcSpl_CopyFromEndW16(const int16_t *vector_in,
     64                               int length,
     65                               int samples,
     66                               int16_t *vector_out)
     67 {
     68     // Copy the last <samples> of the input vector to vector_out
     69     WEBRTC_SPL_MEMCPY_W16(vector_out, &vector_in[length - samples], samples);
     70 }
     71 
     72 void WebRtcSpl_ZerosArrayW16(int16_t *vector, int length)
     73 {
     74     WebRtcSpl_MemSetW16(vector, 0, length);
     75 }
     76 
     77 void WebRtcSpl_ZerosArrayW32(int32_t *vector, int length)
     78 {
     79     WebRtcSpl_MemSetW32(vector, 0, length);
     80 }
     81