FreeCalypso > hg > gsm-codec-lib
annotate libtwamr/cl_ltp.h @ 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 | 85e9768d497f |
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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 : cl_ltp.h |
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11 * Purpose : Closed-loop fractional pitch search |
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12 * |
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13 ******************************************************************************** |
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14 */ |
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15 #ifndef cl_ltp_h |
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16 #define cl_ltp_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 "pitch_fr.h" |
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26 #include "ton_stab.h" |
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27 |
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28 /* |
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29 ******************************************************************************** |
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30 * LOCAL VARIABLES AND TABLES |
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31 ******************************************************************************** |
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32 */ |
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33 |
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34 /* |
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35 ******************************************************************************** |
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36 * DEFINITION OF DATA TYPES |
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37 ******************************************************************************** |
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38 */ |
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39 |
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40 /* state variable */ |
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41 typedef struct { |
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42 Pitch_frState pitchSt; |
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43 } clLtpState; |
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44 |
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45 /* |
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46 ******************************************************************************** |
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47 * DECLARATION OF PROTOTYPES |
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48 ******************************************************************************** |
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49 */ |
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50 |
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51 void cl_ltp_reset (clLtpState *st); |
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52 /* reset of pre processing state (i.e. set state memory to zero) |
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53 returns 0 on success |
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54 */ |
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55 |
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56 int cl_ltp( |
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57 clLtpState *clSt, /* i/o : State struct */ |
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58 tonStabState *tonSt, /* i/o : State struct */ |
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59 enum Mode mode, /* i : coder mode */ |
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60 Word16 frameOffset, /* i : Offset to subframe */ |
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61 Word16 T_op[], /* i : Open loop pitch lags */ |
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62 Word16 *h1, /* i : Impulse response vector Q12 */ |
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63 Word16 *exc, /* i/o : Excitation vector Q0 */ |
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64 Word16 res2[], /* i/o : Long term prediction residual Q0 */ |
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65 Word16 xn[], /* i : Target vector for pitch search Q0 */ |
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66 Word16 lsp_flag, /* i : LSP resonance flag */ |
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67 Word16 xn2[], /* o : Target vector for codebook search Q0 */ |
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68 Word16 y1[], /* o : Filtered adaptive excitation Q0 */ |
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69 Word16 *T0, /* o : Pitch delay (integer part) */ |
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70 Word16 *T0_frac, /* o : Pitch delay (fractional part) */ |
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71 Word16 *gain_pit, /* o : Pitch gain Q14 */ |
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72 Word16 g_coeff[], /* o : Correlations between xn, y1, & y2 */ |
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73 Word16 **anap, /* o : Analysis parameters */ |
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74 Word16 *gp_limit /* o : pitch gain limit */ |
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75 ); |
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76 |
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77 #endif |