michael@0: /***********************************************************************
michael@0: Copyright (c) 2006-2011, Skype Limited. All rights reserved.
michael@0: Redistribution and use in source and binary forms, with or without
michael@0: modification, are permitted provided that the following conditions
michael@0: are met:
michael@0: - Redistributions of source code must retain the above copyright notice,
michael@0: this list of conditions and the following disclaimer.
michael@0: - Redistributions in binary form must reproduce the above copyright
michael@0: notice, this list of conditions and the following disclaimer in the
michael@0: documentation and/or other materials provided with the distribution.
michael@0: - Neither the name of Internet Society, IETF or IETF Trust, nor the
michael@0: names of specific contributors, may be used to endorse or promote
michael@0: products derived from this software without specific prior written
michael@0: permission.
michael@0: THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
michael@0: AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
michael@0: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
michael@0: ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
michael@0: LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
michael@0: CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
michael@0: SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
michael@0: INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
michael@0: CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
michael@0: ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
michael@0: POSSIBILITY OF SUCH DAMAGE.
michael@0: ***********************************************************************/
michael@0: 
michael@0: #ifdef HAVE_CONFIG_H
michael@0: #include "config.h"
michael@0: #endif
michael@0: 
michael@0: /***********************************************************
michael@0: * Pitch analyser function
michael@0: ********************************************************** */
michael@0: #include "SigProc_FIX.h"
michael@0: #include "pitch_est_defines.h"
michael@0: 
michael@0: void silk_decode_pitch(
michael@0:     opus_int16                  lagIndex,           /* I                                                                */
michael@0:     opus_int8                   contourIndex,       /* O                                                                */
michael@0:     opus_int                    pitch_lags[],       /* O    4 pitch values                                              */
michael@0:     const opus_int              Fs_kHz,             /* I    sampling frequency (kHz)                                    */
michael@0:     const opus_int              nb_subfr            /* I    number of sub frames                                        */
michael@0: )
michael@0: {
michael@0:     opus_int   lag, k, min_lag, max_lag, cbk_size;
michael@0:     const opus_int8 *Lag_CB_ptr;
michael@0: 
michael@0:     if( Fs_kHz == 8 ) {
michael@0:         if( nb_subfr == PE_MAX_NB_SUBFR ) {
michael@0:             Lag_CB_ptr = &silk_CB_lags_stage2[ 0 ][ 0 ];
michael@0:             cbk_size   = PE_NB_CBKS_STAGE2_EXT;
michael@0:         } else {
michael@0:             silk_assert( nb_subfr == PE_MAX_NB_SUBFR >> 1 );
michael@0:             Lag_CB_ptr = &silk_CB_lags_stage2_10_ms[ 0 ][ 0 ];
michael@0:             cbk_size   = PE_NB_CBKS_STAGE2_10MS;
michael@0:         }
michael@0:     } else {
michael@0:         if( nb_subfr == PE_MAX_NB_SUBFR ) {
michael@0:             Lag_CB_ptr = &silk_CB_lags_stage3[ 0 ][ 0 ];
michael@0:             cbk_size   = PE_NB_CBKS_STAGE3_MAX;
michael@0:         } else {
michael@0:             silk_assert( nb_subfr == PE_MAX_NB_SUBFR >> 1 );
michael@0:             Lag_CB_ptr = &silk_CB_lags_stage3_10_ms[ 0 ][ 0 ];
michael@0:             cbk_size   = PE_NB_CBKS_STAGE3_10MS;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     min_lag = silk_SMULBB( PE_MIN_LAG_MS, Fs_kHz );
michael@0:     max_lag = silk_SMULBB( PE_MAX_LAG_MS, Fs_kHz );
michael@0:     lag = min_lag + lagIndex;
michael@0: 
michael@0:     for( k = 0; k < nb_subfr; k++ ) {
michael@0:         pitch_lags[ k ] = lag + matrix_ptr( Lag_CB_ptr, k, contourIndex, cbk_size );
michael@0:         pitch_lags[ k ] = silk_LIMIT( pitch_lags[ k ], min_lag, max_lag );
michael@0:     }
michael@0: }