FreeCalypso > hg > gsm-codec-lib
annotate libtwamr/post_pro.h @ 450:16bc3036cc84
LICENSE: acknowledge libtwamr origin from ETSI/3GPP
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Fri, 10 May 2024 01:48:20 +0000 |
parents | a0f914a28371 |
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libtwamr: integrate post_pro.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 : post_pro.h |
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11 * Purpose : Postprocessing of output speech. |
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12 * |
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13 * - 2nd order high pass filtering with cut |
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14 * off frequency at 60 Hz. |
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15 * - Multiplication of output by two. |
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16 * |
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17 ******************************************************************************** |
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18 */ |
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19 #ifndef post_pro_h |
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20 #define post_pro_h "$Id $" |
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21 |
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22 /* |
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23 ******************************************************************************** |
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24 * INCLUDE FILES |
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25 ******************************************************************************** |
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26 */ |
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27 #include "typedef.h" |
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28 |
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29 /* |
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30 ******************************************************************************** |
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31 * LOCAL VARIABLES AND TABLES |
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32 ******************************************************************************** |
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33 */ |
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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 y2_hi; |
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42 Word16 y2_lo; |
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43 Word16 y1_hi; |
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44 Word16 y1_lo; |
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45 Word16 x0; |
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46 Word16 x1; |
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47 } Post_ProcessState; |
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48 |
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49 /* |
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50 ******************************************************************************** |
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51 * DECLARATION OF PROTOTYPES |
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52 ******************************************************************************** |
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53 */ |
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54 |
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55 void Post_Process_reset (Post_ProcessState *st); |
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56 /* reset of Post processing state (i.e. set state memory to zero) |
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57 returns 0 on success |
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58 */ |
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59 |
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60 int Post_Process ( |
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61 Post_ProcessState *st, /* i/o : post process state */ |
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62 Word16 signal[], /* i/o : signal */ |
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63 Word16 lg /* i : lenght of signal */ |
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64 ); |
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65 |
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66 #endif |