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annotate libtwamr/calc_cor.h @ 485:751f06541fbb

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doc/Codec-utils: clarify lack of DHF in gsmfr-decode-rb
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 20 May 2024 01:47:22 +0000
parents 67c31802392b
children
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67c31802392b libtwamr: integrate calc_cor.c
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1 /*
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2 ********************************************************************************
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3 *
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4 * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001
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5 * R99 Version 3.3.0
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6 * REL-4 Version 4.1.0
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7 *
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8 ********************************************************************************
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9 *
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10 * File : calc_cor.h
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11 * Purpose : Calculate all correlations for prior the OL LTP
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12 *
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13 ********************************************************************************
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14 */
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15 #ifndef calc_cor_h
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16 #define calc_cor_h "$Id $"
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17
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18 /*
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19 ********************************************************************************
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20 * INCLUDE FILES
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21 ********************************************************************************
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22 */
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23 #include "typedef.h"
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24
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25 /*
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26 ********************************************************************************
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27 * DECLARATION OF PROTOTYPES
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28 ********************************************************************************
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29 */
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30 /*************************************************************************
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31 *
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32 * FUNCTION: comp_corr
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33 *
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34 * PURPOSE: Calculate all correlations of scal_sig[] in a given delay
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35 * range.
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36 *
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37 * DESCRIPTION:
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38 * The correlation is given by
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39 * cor[t] = <scal_sig[n], scal_sig[n-t]>, t=lag_min,...,lag_max
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40 * The functions outputs all correlations in the given range
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41 *
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42 *************************************************************************/
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43 void comp_corr (Word16 scal_sig[], /* i : scaled signal. */
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44 Word16 L_frame, /* i : length of frame to compute pitch */
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45 Word16 lag_max, /* i : maximum lag */
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46 Word16 lag_min, /* i : minimum lag */
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47 Word32 corr[] /* o : correlation of selected lag */
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48 );
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49 #endif