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- /*
- ********************************************************************************
- *
- * 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 : cl_ltp.h
- * Purpose : Closed-loop fractional pitch search
- *
- ********************************************************************************
- */
- #ifndef cl_ltp_h
- #define cl_ltp_h "$Id $"
-
- /*
- ********************************************************************************
- * INCLUDE FILES
- ********************************************************************************
- */
- #include "typedef.h"
- #include "mode.h"
- #include "pitch_fr.h"
- #include "ton_stab.h"
- /*
- ********************************************************************************
- * LOCAL VARIABLES AND TABLES
- ********************************************************************************
- */
- /*
- ********************************************************************************
- * DEFINITION OF DATA TYPES
- ********************************************************************************
- */
- /* state variable */
- typedef struct {
- Pitch_frState *pitchSt;
- } clLtpState;
- /*
- ********************************************************************************
- * DECLARATION OF PROTOTYPES
- ********************************************************************************
- */
- int cl_ltp_init (clLtpState **st);
- /* initialize one instance of the pre processing state.
- Stores pointer to filter status struct in *st. This pointer has to
- be passed to cl_ltp in each call.
- returns 0 on success
- */
-
- int cl_ltp_reset (clLtpState *st);
- /* reset of pre processing state (i.e. set state memory to zero)
- returns 0 on success
- */
- void cl_ltp_exit (clLtpState **st);
- /* de-initialize pre processing state (i.e. free status struct)
- stores NULL in *st
- */
- int cl_ltp(
- clLtpState *clSt, /* i/o : State struct */
- tonStabState *tonSt, /* i/o : State struct */
- enum Mode mode, /* i : coder mode */
- Word16 frameOffset, /* i : Offset to subframe */
- Word16 T_op[], /* i : Open loop pitch lags */
- Word16 *h1, /* i : Impulse response vector Q12 */
- Word16 *exc, /* i/o : Excitation vector Q0 */
- Word16 res2[], /* i/o : Long term prediction residual Q0 */
- Word16 xn[], /* i : Target vector for pitch search Q0 */
- Word16 lsp_flag, /* i : LSP resonance flag */
- Word16 xn2[], /* o : Target vector for codebook search Q0 */
- Word16 y1[], /* o : Filtered adaptive excitation Q0 */
- Word16 *T0, /* o : Pitch delay (integer part) */
- Word16 *T0_frac, /* o : Pitch delay (fractional part) */
- Word16 *gain_pit, /* o : Pitch gain Q14 */
- Word16 g_coeff[], /* o : Correlations between xn, y1, & y2 */
- Word16 **anap, /* o : Analysis parameters */
- Word16 *gp_limit /* o : pitch gain limit */
- );
- #endif
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