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annotate libtwamr/ph_disp.h @ 460:cb1d1ea7f2c5

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author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 10 May 2024 23:04:44 +0000
parents bde9f5804670
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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 : ph_disp.h
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11 * Purpose : Phase dispersion of excitation signal
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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 #ifndef ph_disp_h
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17 #define ph_disp_h "$Id $"
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18
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19 /*
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20 ********************************************************************************
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21 * INCLUDE FILES
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22 ********************************************************************************
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23 */
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24 #include "tw_amr.h"
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25 #include "typedef.h"
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26
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27 /*
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28 ********************************************************************************
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29 * LOCAL VARIABLES AND TABLES
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30 ********************************************************************************
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31 */
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32 #define PHDGAINMEMSIZE 5
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33 #define PHDTHR1LTP 9830 /* 0.6 in Q14 */
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34 #define PHDTHR2LTP 14746 /* 0.9 in Q14 */
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35 #define ONFACTPLUS1 16384 /* 2.0 in Q13 */
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36 #define ONLENGTH 2
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37 /*
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38 ********************************************************************************
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39 * DEFINITION OF DATA TYPES
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40 ********************************************************************************
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41 */
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42 typedef struct {
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43 Word16 gainMem[PHDGAINMEMSIZE];
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44 Word16 prevState;
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45 Word16 prevCbGain;
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46 Word16 lockFull;
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47 Word16 onset;
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48 } ph_dispState;
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49
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50 /*
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51 ********************************************************************************
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52 * DECLARATION OF PROTOTYPES
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53 ********************************************************************************
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54 */
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55
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56 /*************************************************************************
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57 *
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58 * Function: ph_disp_reset
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59 * Purpose: Initializes state memory
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60 *
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61 **************************************************************************
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62 */
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63 void ph_disp_reset (ph_dispState *state);
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64
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65 /*************************************************************************
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66 *
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67 * Function: ph_disp_lock
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68 * Purpose: mark phase dispersion as locked in state struct
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69 *
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70 **************************************************************************
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71 */
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72 void ph_disp_lock (ph_dispState *state);
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73
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74 /*************************************************************************
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75 *
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76 * Function: ph_disp_release
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77 * Purpose: mark phase dispersion as unlocked in state struct
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78 *
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79 **************************************************************************
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80 */
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81 void ph_disp_release (ph_dispState *state);
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82
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83 /*************************************************************************
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84 *
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85 * Function: ph_disp
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86 * Purpose: perform phase dispersion according to the specified codec
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87 * mode and computes total excitation for synthesis part
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88 * if decoder
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89 *
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90 **************************************************************************
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91 */
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92 void ph_disp (
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93 ph_dispState *state, /* i/o : State struct */
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94 enum Mode mode, /* i : codec mode */
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95 Word16 x[], /* i/o Q0 : in: LTP excitation signal */
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96 /* out: total excitation signal */
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97 Word16 cbGain, /* i Q1 : Codebook gain */
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98 Word16 ltpGain, /* i Q14 : LTP gain */
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99 Word16 inno[], /* i Q13 : Innovation vector (Q12 for 12.2) */
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100 Word16 pitch_fac, /* i Q14 : pitch factor used to scale the
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101 LTP excitation (Q13 for 12.2) */
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102 Word16 tmp_shift /* i Q0 : shift factor applied to sum of
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103 scaled LTP ex & innov. before
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104 rounding */
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105 );
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106
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107 #endif