ref: 8489ff3ffa6930ee32a9616ca10c7dceceb05f8d
dir: /silk/decode_pitch.c/
/***********************************************************************
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***********************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
/***********************************************************
* Pitch analyser function
********************************************************** */
#include "SigProc_FIX.h"
#include "pitch_est_defines.h"
void silk_decode_pitch(
opus_int16 lagIndex, /* I */
opus_int8 contourIndex, /* O */
opus_int pitch_lags[], /* O 4 pitch values */
const opus_int Fs_kHz, /* I sampling frequency (kHz) */
const opus_int nb_subfr /* I number of sub frames */
)
{
opus_int lag, k, min_lag, max_lag, cbk_size;
const opus_int8 *Lag_CB_ptr;
if( Fs_kHz == 8 ) {
if( nb_subfr == PE_MAX_NB_SUBFR ) {
Lag_CB_ptr = &silk_CB_lags_stage2[ 0 ][ 0 ];
cbk_size = PE_NB_CBKS_STAGE2_EXT;
} else {
celt_assert( nb_subfr == PE_MAX_NB_SUBFR >> 1 );
Lag_CB_ptr = &silk_CB_lags_stage2_10_ms[ 0 ][ 0 ];
cbk_size = PE_NB_CBKS_STAGE2_10MS;
}
} else {
if( nb_subfr == PE_MAX_NB_SUBFR ) {
Lag_CB_ptr = &silk_CB_lags_stage3[ 0 ][ 0 ];
cbk_size = PE_NB_CBKS_STAGE3_MAX;
} else {
celt_assert( nb_subfr == PE_MAX_NB_SUBFR >> 1 );
Lag_CB_ptr = &silk_CB_lags_stage3_10_ms[ 0 ][ 0 ];
cbk_size = PE_NB_CBKS_STAGE3_10MS;
}
}
min_lag = silk_SMULBB( PE_MIN_LAG_MS, Fs_kHz );
max_lag = silk_SMULBB( PE_MAX_LAG_MS, Fs_kHz );
lag = min_lag + lagIndex;
for( k = 0; k < nb_subfr; k++ ) {
pitch_lags[ k ] = lag + matrix_ptr( Lag_CB_ptr, k, contourIndex, cbk_size );
pitch_lags[ k ] = silk_LIMIT( pitch_lags[ k ], min_lag, max_lag );
}
}