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annotate libtwamr/spreproc.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 7e0aeab69b10
children
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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 : spreproc.c
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11 * Purpose : Subframe preprocessing
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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 "spreproc.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 "oper_32b.h"
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32 #include "weight_a.h"
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33 #include "syn_filt.h"
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34 #include "residu.h"
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35 #include "memops.h"
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36 #include "no_count.h"
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37
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38 /*
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39 ********************************************************************************
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40 * PUBLIC PROGRAM CODE
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41 ********************************************************************************
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42 */
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43 int subframePreProc(
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44 enum Mode mode, /* i : coder mode */
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45 const Word16 gamma1[], /* i : spectral exp. factor 1 */
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46 const Word16 gamma1_12k2[],/* i : spectral exp. factor 1 for EFR */
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47 const Word16 gamma2[], /* i : spectral exp. factor 2 */
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48 Word16 *A, /* i : A(z) unquantized for the 4 subframes */
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49 Word16 *Aq, /* i : A(z) quantized for the 4 subframes */
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50 Word16 *speech, /* i : speech segment */
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51 Word16 *mem_err, /* i : pointer to error signal */
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52 Word16 *mem_w0, /* i : memory of weighting filter */
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53 Word16 *zero, /* i : pointer to zero vector */
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54 Word16 ai_zero[], /* o : history of weighted synth. filter */
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55 Word16 exc[], /* o : long term prediction residual */
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56 Word16 h1[], /* o : impulse response */
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57 Word16 xn[], /* o : target vector for pitch search */
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58 Word16 res2[], /* o : long term prediction residual */
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59 Word16 error[] /* o : error of LPC synthesis filter */
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60 )
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61 {
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62 Word16 i;
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63 Word16 Ap1[MP1]; /* A(z) with spectral expansion */
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64 Word16 Ap2[MP1]; /* A(z) with spectral expansion */
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65 const Word16 *g1; /* Pointer to correct gammma1 vector */
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66
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67 /*---------------------------------------------------------------*
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68 * mode specific pointer to gamma1 values *
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69 *---------------------------------------------------------------*/
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70 test (); test ();
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71 if ( sub(mode, MR122) == 0 || sub(mode, MR102) == 0 )
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72 {
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73 g1 = gamma1_12k2; move16 ();
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74 }
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75 else
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76 {
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77 g1 = gamma1; move16 ();
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78 }
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79 /*---------------------------------------------------------------*
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80 * Find the weighted LPC coefficients for the weighting filter. *
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81 *---------------------------------------------------------------*/
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82 Weight_Ai(A, g1, Ap1);
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83 Weight_Ai(A, gamma2, Ap2);
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84
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85 /*---------------------------------------------------------------*
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86 * Compute impulse response, h1[], of weighted synthesis filter *
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87 *---------------------------------------------------------------*/
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88 for (i = 0; i <= M; i++)
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89 {
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90 ai_zero[i] = Ap1[i]; move16 ();
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91 }
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92
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93 Syn_filt(Aq, ai_zero, h1, L_SUBFR, zero, 0);
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94 Syn_filt(Ap2, h1, h1, L_SUBFR, zero, 0);
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95
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96 /*------------------------------------------------------------------------*
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97 * *
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98 * Find the target vector for pitch search: *
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99 * *
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100 *------------------------------------------------------------------------*/
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101
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102 /* LPC residual */
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103 Residu(Aq, speech, res2, L_SUBFR);
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104 Copy(res2, exc, L_SUBFR);
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105
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106 Syn_filt(Aq, exc, error, L_SUBFR, mem_err, 0);
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107
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108 Residu(Ap1, error, xn, L_SUBFR);
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109
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110 /* target signal xn[]*/
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111 Syn_filt(Ap2, xn, xn, L_SUBFR, mem_w0, 0);
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112
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113 return 0;
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114 }