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annotate libtwamr/spreproc.h @ 478:936a08cc73ce

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doc/AMR-library-API: describe the decoder
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 19 May 2024 21:32:31 +0000
parents 7e0aeab69b10
children
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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 : spreproc.h
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11 * Purpose : Subframe preprocessing
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12 *
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13 ********************************************************************************
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14 */
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15 #ifndef spreproc_h
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16 #define spreproc_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 "tw_amr.h"
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24 #include "typedef.h"
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25 #include "cnst.h"
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26
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27 /*
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28 ********************************************************************************
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29 * DECLARATION OF PROTOTYPES
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30 ********************************************************************************
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31 */
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32 int subframePreProc(
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33 enum Mode mode, /* i : coder mode */
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34 const Word16 gamma1[], /* i : spectral exp. factor 1 */
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35 const Word16 gamma1_12k2[],/* i : spectral exp. factor 1 for EFR */
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36 const Word16 gamma2[], /* i : spectral exp. factor 2 */
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37 Word16 *A, /* i : A(z) unquantized for the 4 subframes */
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38 Word16 *Aq, /* i : A(z) quantized for the 4 subframes */
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39 Word16 *speech, /* i : speech segment */
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40 Word16 *mem_err, /* i : pointer to error signal */
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41 Word16 *mem_w0, /* i : memory of weighting filter */
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42 Word16 *zero, /* i : pointer to zero vector */
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43 Word16 ai_zero[], /* o : history of weighted synth. filter */
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44 Word16 exc[], /* o : long term prediction residual */
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45 Word16 h1[], /* o : impulse response */
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46 Word16 xn[], /* o : target vector for pitch search */
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47 Word16 res2[], /* o : long term prediction residual */
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48 Word16 error[] /* o : error of LPC synthesis filter */
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49 );
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50
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51 #endif