FreeCalypso > hg > gsm-codec-lib
annotate libtwamr/d1035pf.c @ 429:3ce30a95769e
libtwamr: implement test sequence input
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Tue, 07 May 2024 22:34:11 +0000 |
parents | 2cf33c211544 |
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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 : d1035pf.c |
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11 * Purpose : Builds the innovative codevector |
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12 * |
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13 ******************************************************************************** |
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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 "d1035pf.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 #include "cnst.h" |
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34 #include "graytab.h" |
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35 |
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36 /* |
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37 ******************************************************************************** |
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38 * LOCAL VARIABLES AND TABLES |
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39 ******************************************************************************** |
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40 */ |
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41 #define NB_PULSE 10 /* number of pulses */ |
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42 |
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43 /* |
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44 ******************************************************************************** |
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45 * PUBLIC PROGRAM CODE |
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46 ******************************************************************************** |
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47 */ |
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48 /************************************************************************* |
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49 * |
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50 * FUNCTION: dec_10i40_35bits() |
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51 * |
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52 * PURPOSE: Builds the innovative codevector from the received |
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53 * index of algebraic codebook. |
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54 * |
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55 * See c1035pf.c for more details about the algebraic codebook structure. |
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56 * |
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57 *************************************************************************/ |
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58 void dec_10i40_35bits ( |
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59 Word16 index[], /* (i) : index of 10 pulses (sign+position) */ |
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60 Word16 cod[] /* (o) : algebraic (fixed) codebook excitation */ |
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61 ) |
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62 { |
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63 Word16 i, j, pos1, pos2, sign, tmp; |
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64 |
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65 for (i = 0; i < L_CODE; i++) |
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66 { |
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67 cod[i] = 0; move16 (); |
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68 } |
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69 |
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70 /* decode the positions and signs of pulses and build the codeword */ |
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71 |
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72 for (j = 0; j < NB_TRACK; j++) |
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73 { |
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74 /* compute index i */ |
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75 |
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76 tmp = index[j]; move16 (); |
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77 i = tmp & 7; logic16 (); |
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78 i = dgray[i]; move16 (); |
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79 |
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80 i = extract_l (L_shr (L_mult (i, 5), 1)); |
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81 pos1 = add (i, j); /* position of pulse "j" */ |
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82 |
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83 i = shr (tmp, 3) & 1; logic16 (); |
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84 test (); |
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85 if (i == 0) |
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86 { |
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87 sign = 4096; move16 (); /* +1.0 */ |
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88 } |
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89 else |
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90 { |
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91 sign = -4096; move16 (); /* -1.0 */ |
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92 } |
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93 |
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94 cod[pos1] = sign; move16 (); |
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95 |
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96 /* compute index i */ |
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97 |
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98 i = index[add (j, 5)] & 7; logic16 (); |
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99 i = dgray[i]; move16 (); |
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100 i = extract_l (L_shr (L_mult (i, 5), 1)); |
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101 |
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102 pos2 = add (i, j); /* position of pulse "j+5" */ |
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103 |
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104 test (); |
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105 if (sub (pos2, pos1) < 0) |
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106 { |
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107 sign = negate (sign); |
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108 } |
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109 cod[pos2] = add (cod[pos2], sign); move16 (); |
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110 } |
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111 |
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112 return; |
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113 } |