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2
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1 /*
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2 ============================================================================
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3 File: G726.H 28-Feb-1991 (18:00:00)
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4 ============================================================================
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5
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6 UGST/ITU-T G726 MODULE
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7
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8 GLOBAL FUNCTION PROTOTYPES
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9
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10 History:
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11 28.Feb.92 v1.0 First version <simao@cpqd.br>
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12 06.May.94 v2.0 Smart prototypes that work with many compilers <simao>
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13 ============================================================================
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14 */
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15 #ifndef G726_defined
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16 #define G726_defined 200
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17
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18 /* Smart function prototypes: for [ag]cc, VaxC, and [tb]cc */
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19 #if !defined(ARGS)
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20 #if (defined(__STDC__) || defined(VMS) || defined(__DECC) || defined(MSDOS) || defined(__MSDOS__)) || defined (__CYGWIN__) || defined (_MSC_VER)
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21 #define ARGS(s) s
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22 #else
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23 #define ARGS(s) ()
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24 #endif
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25 #endif
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26
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27
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28 /* State for G726 encoder and decoder */
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29 typedef struct {
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30 short sr0, sr1; /* Reconstructed signal with delays 0 and 1 */
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31 short a1r, a2r; /* Triggered 2nd order predictor coeffs. */
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32 short b1r; /* Triggered 6nd order predictor coeffs */
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33 short b2r;
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34 short b3r;
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35 short b4r;
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36 short b5r;
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37 short b6r;
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38 short dq5; /* Quantized difference signal with delays 5
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39 * to 0 */
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40 short dq4;
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41 short dq3;
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42 short dq2;
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43 short dq1;
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44 short dq0;
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45 short dmsp; /* Short term average of the F(I) sequence */
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46 short dmlp; /* Long term average of the F(I) sequence */
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47 short apr; /* Triggered unlimited speed control
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48 * parameter */
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49 short yup; /* Fast quantizer scale factor */
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50 short tdr; /* Triggered tone detector */
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51 short pk0, pk1; /* sign of dq+sez with delays 0 and 1 */
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52 long ylp; /* Slow quantizer scale factor */
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53 } G726_state;
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54
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55 #ifdef VAXC
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56 # define SHORT short
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57 #else
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58 # define SHORT int
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59 #endif
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60
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61 /* Function prototypes */
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62 void G726_encode ARGS((unsigned char *inp_buf, short *out_buf, long smpno,
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63 char *law, SHORT rate, SHORT r, G726_state * state));
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64 void G726_decode ARGS((short *inp_buf, unsigned char *out_buf, long smpno,
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65 char *law, SHORT rate, SHORT r, G726_state * state));
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66 void G726_expand ARGS((short *s, char *law, short *sl));
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67 void G726_subta ARGS((short *sl, short *se, short *d));
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68 void G726_log ARGS((short *d, short *dl, short *ds));
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69 void G726_quan ARGS((SHORT rate, short *dln, short *ds, short *i));
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70 void G726_subtb ARGS((short *dl, short *y, short *dln));
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71 void G726_adda ARGS((short *dqln, short *y, short *dql));
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72 void G726_antilog ARGS((short *dql, short *dqs, short *dq));
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73 void G726_reconst ARGS((SHORT rate, short *i, short *dqln, short *dqs));
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74 void G726_delaya ARGS((short *r, short *x, short *y));
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75 void G726_delayb ARGS((short *r, short *x, short *y));
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76 void G726_delayc ARGS((short *r, long *x, long *y));
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77 void G726_delayd ARGS((short *r, short *x, short *y));
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78 void G726_filtd ARGS((short *wi, short *y, short *yut));
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79 void G726_filte ARGS((short *yup, long *yl, long *ylp));
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80 void G726_functw ARGS((SHORT rate, short *i, short *wi));
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81 void G726_limb ARGS((short *yut, short *yup));
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82 void G726_mix ARGS((short *al, short *yu, long *yl, short *y));
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83 void G726_filta ARGS((short *fi, short *dms, short *dmsp));
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84 void G726_filtb ARGS((short *fi, short *dml, short *dmlp));
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85 void G726_filtc ARGS((short *ax, short *ap, short *app));
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86 void G726_functf ARGS((SHORT rate, short *i, short *fi));
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87 void G726_lima ARGS((short *ap, short *al));
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88 void G726_subtc ARGS((short *dmsp, short *dmlp, short *tdp, short *y,
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89 short *ax));
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90 void G726_triga ARGS((short *tr, short *app, short *apr));
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91 void G726_accum ARGS((short *wa1, short *wa2, short *wb1, short *wb2,
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92 short *wb3, short *wb4, short *wb5, short *wb6, short *se,
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93 short *sez));
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94 void G726_addb ARGS((short *dq, short *se, short *sr));
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95 void G726_addc ARGS((short *dq, short *sez, short *pk0, short *sigpk));
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96 void G726_floata ARGS((short *dq, short *dq0));
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97 void G726_floatb ARGS((short *sr, short *sr0));
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98 void G726_fmult ARGS((short *An, short *SRn, short *WAn));
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99 void G726_limc ARGS((short *a2t, short *a2p));
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100 void G726_limd ARGS((short *a1t, short *a2p, short *a1p));
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101 void G726_trigb ARGS((short *tr, short *ap, short *ar));
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102 void G726_upa1 ARGS((short *pk0, short *pk1, short *a1, short *sigpk,
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103 short *a1t));
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104 void G726_upa2 ARGS((short *pk0, short *pk1, short *pk2, short *a2,
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105 short *a1, short *sigpk, short *a2t));
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106 void G726_upb ARGS((SHORT rate, short *u, short *b, short *dq,
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107 short *bp));
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108 void G726_xor ARGS((short *dqn, short *dq, short *u));
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109 void G726_tone ARGS((short *a2p, short *tdp));
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110 void G726_trans ARGS((short *td, long *yl, short *dq, short *tr));
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111 void G726_compress ARGS((short *sr, char *law, short *sp));
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112 void G726_sync ARGS((SHORT rate, short *i, short *sp, short *dlnx,
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113 short *dsx, char *law, short *sd));
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114
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115 /* Definitions for better user interface (?!) */
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116 #ifndef IS_LOG
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117 # define IS_LOG 0
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118 #endif
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119
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120 #ifndef IS_LIN
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121 # define IS_LIN 1
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122 #endif
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123
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124 #ifndef IS_ADPCM
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125 # define IS_ADPCM 2
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126 #endif
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127
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128 #endif
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129 /* .......................... End of G726.H ........................... */
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