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annotate libtwamr/c8_31pf.h @ 496:af70bf42eb1b

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libgsmhr1: implement DHF const array
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 18 Jun 2024 00:15:46 +0000
parents dfd5f159574b
children
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dfd5f159574b libtwamr: integrate c8_31pf.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 : c8_31pf.h
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11 * Purpose : Searches a 31 bit algebraic codebook containing
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12 * : 8 pulses in a frame of 40 samples.
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13 *
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14 ********************************************************************************
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15 */
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16 #ifndef c8_31pf_h
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17 #define c8_31pf_h "$Id $"
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18
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19 /*
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20 ********************************************************************************
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21 * INCLUDE FILES
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22 ********************************************************************************
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23 */
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24 #include "typedef.h"
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25
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26 /*
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27 ********************************************************************************
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28 * DEFINITION OF DATA TYPES
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29 ********************************************************************************
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30 */
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31
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32 /*
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33 ********************************************************************************
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34 * DECLARATION OF PROTOTYPES
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35 ********************************************************************************
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36 */
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37 void code_8i40_31bits (
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38 Word16 x[], /* i : target vector */
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39 Word16 cn[], /* i : residual after long term prediction */
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40 Word16 h[], /* i : impulse response of weighted synthesis
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41 filter */
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42 Word16 cod[], /* o : algebraic (fixed) codebook excitation */
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43 Word16 y[], /* o : filtered fixed codebook excitation */
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44 Word16 indx[] /* o : 7 Word16, index of 8 pulses (signs+positions) */
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45 );
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46
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47 #endif