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annotate libtwamr/d2_11pf.c @ 585:3c6bf0d26ee7 default tip

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TW-TS-005 reader: fix maximum line length bug TW-TS-005 section 4.1 states: The maximum allowed length of each line is 80 characters, not including the OS-specific newline encoding. The implementation of this line length limit in the TW-TS-005 hex file reader function in the present suite was wrong, such that lines of the full maximum length could not be read. Fix it. Note that this bug affects comment lines too, not just actual RTP payloads. Neither Annex A nor Annex B features an RTP payload format that goes to the maximum of 40 bytes, but if a comment line goes to the maximum allowed length of 80 characters not including the terminating newline, the bug will be triggered, necessitating the present fix.
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 25 Feb 2025 07:49:28 +0000
parents c75327562b5e
children
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c75327562b5e libtwamr: integrate d2_11pf.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 : d2_11pf.c
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11 * Purpose : Algebraic codebook decoder
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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 * MODULE INCLUDE FILE AND VERSION ID
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19 ********************************************************************************
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20 */
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21 #include "namespace.h"
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22 #include "d2_11pf.h"
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23
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24 /*
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25 ********************************************************************************
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26 * INCLUDE FILES
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27 ********************************************************************************
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28 */
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29 #include "typedef.h"
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30 #include "basic_op.h"
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31 #include "no_count.h"
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32 #include "cnst.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 #define NB_PULSE 2 /* number of pulses */
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40
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41 /*
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42 ********************************************************************************
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43 * PUBLIC PROGRAM CODE
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44 ********************************************************************************
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45 */
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46 /*************************************************************************
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47 *
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48 * FUNCTION: decode_2i40_11bits (decod_ACELP())
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49 *
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50 * PURPOSE: Algebraic codebook decoder
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51 *
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52 *************************************************************************/
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53
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54 void decode_2i40_11bits(
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55 Word16 sign, /* i : signs of 2 pulses. */
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56 Word16 index, /* i : Positions of the 2 pulses. */
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57 Word16 cod[] /* o : algebraic (fixed) codebook excitation */
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58 )
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59 {
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60 Word16 i, j;
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61 Word16 pos[NB_PULSE];
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62
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63 /* Decode the positions */
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64
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65 j = index & 1; logic16 ();
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66 index = shr(index, 1);
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67 i = index & 7; logic16 ();
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68
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69 i = add(i, shl(i, 2)); /* pos0 =i*5+1+j*2 */
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70 i = add(i, 1);
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71 j = shl(j, 1);
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72 pos[0] = add(i, j); move16 ();
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73
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74 index = shr(index, 3);
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75 j = index & 3; logic16 ();
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76 index = shr(index, 2);
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77 i = index & 7; logic16 ();
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78
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79 test();
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80 if (sub(j, 3) == 0)
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81 {
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82 i = add(i, shl(i, 2)); /* pos1 =i*5+4 */
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83 pos[1] = add(i, 4); move16 ();
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84 }
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85 else
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86 {
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87 i = add(i, shl(i, 2)); /* pos1 =i*5+j */
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88 pos[1] = add(i, j); move16 ();
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89 }
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90
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91 /* decode the signs and build the codeword */
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92
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93 for (i = 0; i < L_SUBFR; i++) {
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94 cod[i] = 0; move16 ();
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95 }
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96
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97 for (j = 0; j < NB_PULSE; j++) {
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98 i = sign & 1; logic16 ();
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99 sign = shr(sign, 1);
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100
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101 test ();
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102 if (i != 0) {
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103 cod[pos[j]] = 8191; move16 (); /* +1.0 */
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104 } else {
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105 cod[pos[j]] = -8192; move16 (); /* -1.0 */
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106 }
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107 }
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108
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109 return;
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110 }