FreeCalypso > hg > gsm-codec-lib
annotate libtwamr/dtx_enc.h @ 459:b094bc07051a
doc/Codec-utils: document twamr-* addition
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Fri, 10 May 2024 19:50:29 +0000 |
parents | 5a1d18542f8a |
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rev | line source |
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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 : dtx_enc.h |
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11 * Purpose : DTX mode computation of SID parameters |
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12 * |
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13 ******************************************************************************** |
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14 */ |
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15 #ifndef dtx_enc_h |
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16 #define dtx_enc_h "$Id $" |
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17 |
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18 /* |
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19 ******************************************************************************** |
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20 * INCLUDE FILES |
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21 ******************************************************************************** |
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22 */ |
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23 #include "tw_amr.h" |
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24 #include "typedef.h" |
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25 #include "cnst.h" |
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26 #include "q_plsf.h" |
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27 #include "gc_pred.h" |
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28 #include "dtx_common.h" |
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29 |
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30 /* |
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31 ******************************************************************************** |
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32 * DEFINITION OF DATA TYPES |
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33 ******************************************************************************** |
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34 */ |
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35 typedef struct { |
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36 Word16 lsp_hist[M * DTX_HIST_SIZE]; |
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37 Word16 log_en_hist[DTX_HIST_SIZE]; |
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38 Word16 hist_ptr; |
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39 Word16 log_en_index; |
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40 Word16 init_lsf_vq_index; |
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41 Word16 lsp_index[3]; |
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42 |
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43 /* DTX handler stuff */ |
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44 Word16 dtxHangoverCount; |
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45 Word16 decAnaElapsedCount; |
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46 |
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47 } dtx_encState; |
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48 /* |
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49 ******************************************************************************** |
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50 * DECLARATION OF PROTOTYPES |
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51 ******************************************************************************** |
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52 */ |
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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 * Function : dtx_enc_reset |
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58 * Purpose : Resets state memory |
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59 * Returns : 0 on success |
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60 * |
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61 ************************************************************************** |
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62 */ |
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63 void dtx_enc_reset (dtx_encState *st); |
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64 |
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65 /* |
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66 ************************************************************************** |
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67 * |
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68 * Function : dtx_enc |
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69 * Purpose : |
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70 * Description : |
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71 * |
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72 ************************************************************************** |
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73 */ |
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74 int dtx_enc(dtx_encState *st, /* i/o : State struct */ |
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75 Word16 computeSidFlag, /* i : compute SID */ |
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76 Q_plsfState *qSt, /* i/o : Qunatizer state struct */ |
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77 gc_predState* predState, /* i/o : State struct */ |
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78 Word16 **anap /* o : analysis parameters */ |
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79 ); |
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80 |
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81 /* |
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82 ************************************************************************** |
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83 * |
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84 * Function : dtx_buffer |
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85 * Purpose : handles the DTX buffer |
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86 * |
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87 ************************************************************************** |
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88 */ |
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89 int dtx_buffer(dtx_encState *st, /* i/o : State struct */ |
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90 Word16 lsp_new[], /* i : LSP vector */ |
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91 Word16 speech[] /* i : speech samples */ |
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92 ); |
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93 |
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94 /* |
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95 ************************************************************************** |
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96 * |
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97 * Function : tx_dtx_handler |
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98 * Purpose : adds extra speech hangover to analyze speech on the decoding side. |
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99 * Description : returns 1 when a new SID analysis may be made |
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100 * otherwise it adds the appropriate hangover after a sequence |
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101 * with out updates of SID parameters . |
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102 * |
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103 ************************************************************************** |
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104 */ |
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105 Word16 tx_dtx_handler(dtx_encState *st, /* i/o : State struct */ |
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106 Word16 vadFlag, /* i : vad control variable */ |
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107 enum Mode *usedMode /* o : mode changed or not */ |
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108 ); |
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libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
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109 |
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libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
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110 #endif |