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annotate libtwamr/q_plsf.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 4a8cabac281e
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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 : q_plsf.h
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11 * Purpose : common include file for LSF vector/matrix quanti-
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12 * sation modules (q_plsf_3.c/q_plsf_5.c)
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13 *
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14 ********************************************************************************
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15 */
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16 #ifndef q_plsf_h
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17 #define q_plsf_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 "tw_amr.h"
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25 #include "typedef.h"
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26 #include "cnst.h"
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27 /*
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28 ********************************************************************************
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29 * DEFINITION OF DATA TYPES
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30 ********************************************************************************
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31 */
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32 typedef struct {
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33 Word16 past_rq[M]; /* Past quantized prediction error, Q15 */
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34 } Q_plsfState;
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35
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36 /*
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37 ********************************************************************************
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38 * DECLARATION OF PROTOTYPES
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39 ********************************************************************************
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40 */
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41
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42 void Q_plsf_reset (Q_plsfState *st);
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43 /* reset of state (i.e. set state memory to zero)
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44 returns 0 on success
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45 */
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46
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47 void Q_plsf_3(
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48 Q_plsfState *st, /* i/o: state struct */
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49 enum Mode mode, /* i : coder mode */
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50 Word16 *lsp1, /* i : 1st LSP vector Q15 */
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51 Word16 *lsp1_q, /* o : quantized 1st LSP vector Q15 */
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52 Word16 *indice, /* o : quantization indices of 3 vectors Q0 */
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53 Word16 *pred_init_i /* o : init index for MA prediction in DTX mode */
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54 );
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55
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56 void Q_plsf_5 (
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57 Q_plsfState *st,
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58 Word16 *lsp1, /* i : 1st LSP vector, Q15 */
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59 Word16 *lsp2, /* i : 2nd LSP vector, Q15 */
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60 Word16 *lsp1_q, /* o : quantized 1st LSP vector, Q15 */
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61 Word16 *lsp2_q, /* o : quantized 2nd LSP vector, Q15 */
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62 Word16 *indice /* o : quantization indices of 5 matrices, Q0 */
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63 );
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64
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65 #endif