FreeCalypso > hg > gsm-codec-lib
annotate libtwamr/lsp_avg.h @ 421:09534cdc59ec
libtwamr/tw_amr.h: rm trailing spaces from enum Mode list
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Tue, 07 May 2024 05:40:10 +0000 |
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libtwamr: integrate lsp_avg.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 : lsp_avg.h |
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11 * Purpose: : LSP averaging and history |
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12 * The LSPs are averaged over 8 frames |
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13 * |
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14 ******************************************************************************** |
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15 */ |
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16 #ifndef lsp_avg_h |
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17 #define lsp_avg_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 #include "cnst.h" |
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26 |
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27 /* |
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28 ******************************************************************************** |
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29 * LOCAL VARIABLES AND TABLES |
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30 ******************************************************************************** |
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31 */ |
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32 |
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33 #define EXPCONST 5243 /* 0.16 in Q15 */ |
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34 |
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35 /* |
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36 ******************************************************************************** |
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37 * DEFINITION OF DATA TYPES |
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38 ******************************************************************************** |
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39 */ |
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40 typedef struct { |
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41 Word16 lsp_meanSave[M]; /* Averaged LSPs saved for efficiency */ |
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42 } lsp_avgState; |
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43 |
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44 /* |
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45 ******************************************************************************** |
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46 * DECLARATION OF PROTOTYPES |
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47 ******************************************************************************** |
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48 */ |
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49 |
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50 /* |
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51 ************************************************************************** |
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52 * |
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53 * Function : lsp_history_reset |
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54 * Purpose : Resets state memory |
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55 * |
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56 ************************************************************************** |
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57 */ |
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58 void lsp_avg_reset ( |
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59 lsp_avgState *state |
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60 ); |
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61 |
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62 /* |
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63 ************************************************************************** |
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64 * |
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65 * Function : lsp_avg |
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66 * Purpose : Calculate the LSP averages |
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67 * |
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68 ************************************************************************** |
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69 */ |
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70 void lsp_avg ( |
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71 lsp_avgState *st, /* i/o : State struct Q15 */ |
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72 Word16 *lsp /* i : LSP vector Q15 */ |
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73 ); |
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74 #endif |