FreeCalypso > hg > gsm-codec-lib
diff libtwamr/pitch_fr.h @ 391:be8edf9e6bc1
libtwamr: integrate pitch_fr.c
| author | Mychaela Falconia <falcon@freecalypso.org> |
|---|---|
| date | Mon, 06 May 2024 18:30:00 +0000 |
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| children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/libtwamr/pitch_fr.h Mon May 06 18:30:00 2024 +0000 @@ -0,0 +1,62 @@ +/* +******************************************************************************** +* +* GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001 +* R99 Version 3.3.0 +* REL-4 Version 4.1.0 +* +******************************************************************************** +* +* File : pitch_fr.h +* Purpose : Find the pitch period with 1/3 or 1/6 subsample +* : resolution (closed loop). +* +******************************************************************************** +*/ +#ifndef pitch_fr_h +#define pitch_fr_h "$Id $" + +/* +******************************************************************************** +* INCLUDE FILES +******************************************************************************** +*/ +#include "tw_amr.h" +#include "typedef.h" + +/* +******************************************************************************** +* DEFINITION OF DATA TYPES +******************************************************************************** +*/ +typedef struct { + Word16 T0_prev_subframe; /* integer pitch lag of previous sub-frame */ +} Pitch_frState; + +/* +******************************************************************************** +* DECLARATION OF PROTOTYPES +******************************************************************************** +*/ + +void Pitch_fr_reset (Pitch_frState *st); +/* reset of pre processing state (i.e. set state memory to zero) + returns 0 on success + */ + +Word16 Pitch_fr ( /* o : pitch period (integer) */ + Pitch_frState *st, /* i/o : State struct */ + enum Mode mode, /* i : codec mode */ + Word16 T_op[], /* i : open loop pitch lags */ + Word16 exc[], /* i : excitation buffer */ + Word16 xn[], /* i : target vector */ + Word16 h[], /* i : impulse response of synthesis and + weighting filters */ + Word16 L_subfr, /* i : Length of subframe */ + Word16 i_subfr, /* i : subframe offset */ + Word16 *pit_frac, /* o : pitch period (fractional) */ + Word16 *resu3, /* o : subsample resolution 1/3 (=1) or 1/6 (=0) */ + Word16 *ana_index /* o : index of encoding */ +); + +#endif