| /* |
| * 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. |
| */ |
| |
| #include "webrtc/common_audio/signal_processing/include/signal_processing_library.h" |
| |
| /* C version of WebRtcSpl_CrossCorrelation() for generic platforms. */ |
| void WebRtcSpl_CrossCorrelationC(int32_t* cross_correlation, |
| const int16_t* seq1, |
| const int16_t* seq2, |
| size_t dim_seq, |
| size_t dim_cross_correlation, |
| int right_shifts, |
| int step_seq2) { |
| size_t i = 0, j = 0; |
| |
| for (i = 0; i < dim_cross_correlation; i++) { |
| int32_t corr = 0; |
| for (j = 0; j < dim_seq; j++) |
| corr += (seq1[j] * seq2[j]) >> right_shifts; |
| seq2 += step_seq2; |
| *cross_correlation++ = corr; |
| } |
| } |