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