FreeCalypso > hg > gsm-codec-lib
annotate libtwamr/reorder.c @ 480:332397bc80aa
doc/AMR-library-API: document public const data items
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 19 May 2024 23:18:17 +0000 |
parents | 05a46720af0f |
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rev | line source |
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libtwamr: integrate d_plsf_3.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 : reorder.c |
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11 * Purpose : To make sure that the LSFs are properly ordered |
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12 * : and to keep a certain minimum distance between |
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13 * : adjacent LSFs. |
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14 * |
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15 ******************************************************************************** |
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16 */ |
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17 /* |
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18 ******************************************************************************** |
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19 * MODULE INCLUDE FILE AND VERSION ID |
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20 ******************************************************************************** |
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21 */ |
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22 #include "namespace.h" |
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23 #include "reorder.h" |
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24 |
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25 /* |
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26 ******************************************************************************** |
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27 * INCLUDE FILES |
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28 ******************************************************************************** |
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29 */ |
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30 #include "typedef.h" |
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31 #include "basic_op.h" |
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32 #include "no_count.h" |
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33 |
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34 /* |
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35 ******************************************************************************** |
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36 * LOCAL VARIABLES AND TABLES |
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37 ******************************************************************************** |
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38 */ |
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39 |
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40 /* |
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41 ******************************************************************************** |
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42 * PUBLIC PROGRAM CODE |
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43 ******************************************************************************** |
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44 */ |
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45 /************************************************************************* |
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46 * |
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47 * FUNCTION: Reorder_lsf() |
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48 * |
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49 * PURPOSE: To make sure that the LSFs are properly ordered and to keep a |
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50 * certain minimum distance between adjacent LSFs. |
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51 * |
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52 * The LSFs are in the frequency range 0-0.5 and represented in Q15 |
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53 * |
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54 *************************************************************************/ |
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55 void Reorder_lsf ( |
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56 Word16 *lsf, /* (i/o) : vector of LSFs (range: 0<=val<=0.5) */ |
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57 Word16 min_dist, /* (i) : minimum required distance */ |
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58 Word16 n /* (i) : LPC order */ |
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59 ) |
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60 { |
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61 Word16 i; |
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62 Word16 lsf_min; |
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63 |
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64 lsf_min = min_dist; move16 (); |
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65 for (i = 0; i < n; i++) |
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66 { |
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67 test (); |
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68 if (sub (lsf[i], lsf_min) < 0) |
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69 { |
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70 lsf[i] = lsf_min; move16 (); |
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71 } |
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72 lsf_min = add (lsf[i], min_dist); |
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73 } |
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74 } |