1*a58d3d2aSXin Li /***********************************************************************
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26*a58d3d2aSXin Li ***********************************************************************/
27*a58d3d2aSXin Li
28*a58d3d2aSXin Li #ifdef HAVE_CONFIG_H
29*a58d3d2aSXin Li #include "config.h"
30*a58d3d2aSXin Li #endif
31*a58d3d2aSXin Li
32*a58d3d2aSXin Li /***********************************************************
33*a58d3d2aSXin Li * Pitch analyser function
34*a58d3d2aSXin Li ********************************************************** */
35*a58d3d2aSXin Li #include "SigProc_FIX.h"
36*a58d3d2aSXin Li #include "pitch_est_defines.h"
37*a58d3d2aSXin Li
silk_decode_pitch(opus_int16 lagIndex,opus_int8 contourIndex,opus_int pitch_lags[],const opus_int Fs_kHz,const opus_int nb_subfr)38*a58d3d2aSXin Li void silk_decode_pitch(
39*a58d3d2aSXin Li opus_int16 lagIndex, /* I */
40*a58d3d2aSXin Li opus_int8 contourIndex, /* O */
41*a58d3d2aSXin Li opus_int pitch_lags[], /* O 4 pitch values */
42*a58d3d2aSXin Li const opus_int Fs_kHz, /* I sampling frequency (kHz) */
43*a58d3d2aSXin Li const opus_int nb_subfr /* I number of sub frames */
44*a58d3d2aSXin Li )
45*a58d3d2aSXin Li {
46*a58d3d2aSXin Li opus_int lag, k, min_lag, max_lag, cbk_size;
47*a58d3d2aSXin Li const opus_int8 *Lag_CB_ptr;
48*a58d3d2aSXin Li
49*a58d3d2aSXin Li if( Fs_kHz == 8 ) {
50*a58d3d2aSXin Li if( nb_subfr == PE_MAX_NB_SUBFR ) {
51*a58d3d2aSXin Li Lag_CB_ptr = &silk_CB_lags_stage2[ 0 ][ 0 ];
52*a58d3d2aSXin Li cbk_size = PE_NB_CBKS_STAGE2_EXT;
53*a58d3d2aSXin Li } else {
54*a58d3d2aSXin Li celt_assert( nb_subfr == PE_MAX_NB_SUBFR >> 1 );
55*a58d3d2aSXin Li Lag_CB_ptr = &silk_CB_lags_stage2_10_ms[ 0 ][ 0 ];
56*a58d3d2aSXin Li cbk_size = PE_NB_CBKS_STAGE2_10MS;
57*a58d3d2aSXin Li }
58*a58d3d2aSXin Li } else {
59*a58d3d2aSXin Li if( nb_subfr == PE_MAX_NB_SUBFR ) {
60*a58d3d2aSXin Li Lag_CB_ptr = &silk_CB_lags_stage3[ 0 ][ 0 ];
61*a58d3d2aSXin Li cbk_size = PE_NB_CBKS_STAGE3_MAX;
62*a58d3d2aSXin Li } else {
63*a58d3d2aSXin Li celt_assert( nb_subfr == PE_MAX_NB_SUBFR >> 1 );
64*a58d3d2aSXin Li Lag_CB_ptr = &silk_CB_lags_stage3_10_ms[ 0 ][ 0 ];
65*a58d3d2aSXin Li cbk_size = PE_NB_CBKS_STAGE3_10MS;
66*a58d3d2aSXin Li }
67*a58d3d2aSXin Li }
68*a58d3d2aSXin Li
69*a58d3d2aSXin Li min_lag = silk_SMULBB( PE_MIN_LAG_MS, Fs_kHz );
70*a58d3d2aSXin Li max_lag = silk_SMULBB( PE_MAX_LAG_MS, Fs_kHz );
71*a58d3d2aSXin Li lag = min_lag + lagIndex;
72*a58d3d2aSXin Li
73*a58d3d2aSXin Li for( k = 0; k < nb_subfr; k++ ) {
74*a58d3d2aSXin Li pitch_lags[ k ] = lag + matrix_ptr( Lag_CB_ptr, k, contourIndex, cbk_size );
75*a58d3d2aSXin Li pitch_lags[ k ] = silk_LIMIT( pitch_lags[ k ], min_lag, max_lag );
76*a58d3d2aSXin Li }
77*a58d3d2aSXin Li }
78