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 iLBC Speech Coder ANSI-C Source Code 14 15 WebRtcIlbcfix_XcorrCoef.h 16 17 ******************************************************************/ 18 19 #ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_XCORR_COEF_H_ 20 #define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_XCORR_COEF_H_ 21 22 #include <stddef.h> 23 #include <stdint.h> 24 25 /*----------------------------------------------------------------* 26 * cross correlation which finds the optimal lag for the 27 * crossCorr*crossCorr/(energy) criteria 28 *---------------------------------------------------------------*/ 29 30 size_t WebRtcIlbcfix_XcorrCoef( 31 int16_t* target, /* (i) first array */ 32 int16_t* regressor, /* (i) second array */ 33 size_t subl, /* (i) dimension arrays */ 34 size_t searchLen, /* (i) the search lenght */ 35 size_t offset, /* (i) samples offset between arrays */ 36 int16_t step /* (i) +1 or -1 */ 37 ); 38 39 #endif 40