FreeCalypso > hg > gsm-codec-lib
annotate libtwamr/ol_ltp.c @ 452:6e595f7d40e2
CHANGES: document changes for the upcoming release
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Fri, 10 May 2024 03:45:47 +0000 |
parents | f17e42c63058 |
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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 : ol_ltp.c |
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11 * Purpose : Compute the open loop pitch lag. |
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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 "ol_ltp.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 "cnst.h" |
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31 #include "pitch_ol.h" |
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32 #include "p_ol_wgh.h" |
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33 #include "no_count.h" |
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34 #include "basic_op.h" |
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35 |
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36 /* |
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37 ******************************************************************************** |
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38 * LOCAL VARIABLES AND TABLES |
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39 ******************************************************************************** |
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40 */ |
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41 |
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42 /* |
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43 ******************************************************************************** |
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44 * PUBLIC PROGRAM CODE |
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45 ******************************************************************************** |
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46 */ |
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47 int ol_ltp( |
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48 pitchOLWghtState *st, /* i/o : State struct */ |
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49 vadState *vadSt, /* i/o : VAD state struct */ |
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50 enum Mode mode, /* i : coder mode */ |
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51 Word16 wsp[], /* i : signal used to compute the OL pitch, Q0 */ |
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52 /* uses signal[-pit_max] to signal[-1] */ |
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53 Word16 *T_op, /* o : open loop pitch lag, Q0 */ |
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54 Word16 old_lags[], /* i : history with old stored Cl lags */ |
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55 Word16 ol_gain_flg[], /* i : OL gain flag */ |
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56 Word16 idx, /* i : index */ |
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57 Flag dtx /* i : dtx flag; use dtx=1, do not use dtx=0 */ |
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58 ) |
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59 { |
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60 test (); |
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61 if (sub (mode, MR102) != 0 ) |
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62 { |
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63 ol_gain_flg[0] = 0; move16 (); |
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64 ol_gain_flg[1] = 0; move16 (); |
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65 } |
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66 |
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67 test (); test (); |
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68 if (sub (mode, MR475) == 0 || sub (mode, MR515) == 0 ) |
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69 { |
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70 *T_op = Pitch_ol(vadSt, mode, wsp, PIT_MIN, PIT_MAX, L_FRAME, idx, dtx); |
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71 move16 (); |
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72 } |
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73 else |
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74 { |
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75 if ( sub (mode, MR795) <= 0 ) |
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76 { |
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77 test(); |
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78 *T_op = Pitch_ol(vadSt, mode, wsp, PIT_MIN, PIT_MAX, L_FRAME_BY2, |
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79 idx, dtx); |
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80 move16 (); |
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81 } |
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82 else if ( sub (mode, MR102) == 0 ) |
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83 { |
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84 test(); test(); |
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85 *T_op = Pitch_ol_wgh(st, vadSt, wsp, PIT_MIN, PIT_MAX, L_FRAME_BY2, |
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86 old_lags, ol_gain_flg, idx, dtx); |
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87 move16 (); |
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88 } |
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89 else |
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90 { |
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91 test(); test(); |
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92 *T_op = Pitch_ol(vadSt, mode, wsp, PIT_MIN_MR122, PIT_MAX, |
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93 L_FRAME_BY2, idx, dtx); |
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94 move16 (); |
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95 } |
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96 } |
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97 return 0; |
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98 } |