Chris@69: /***********************************************************************
Chris@69: Copyright (c) 2006-2011, Skype Limited. All rights reserved.
Chris@69: Redistribution and use in source and binary forms, with or without
Chris@69: modification, are permitted provided that the following conditions
Chris@69: are met:
Chris@69: - Redistributions of source code must retain the above copyright notice,
Chris@69: this list of conditions and the following disclaimer.
Chris@69: - Redistributions in binary form must reproduce the above copyright
Chris@69: notice, this list of conditions and the following disclaimer in the
Chris@69: documentation and/or other materials provided with the distribution.
Chris@69: - Neither the name of Internet Society, IETF or IETF Trust, nor the
Chris@69: names of specific contributors, may be used to endorse or promote
Chris@69: products derived from this software without specific prior written
Chris@69: permission.
Chris@69: THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
Chris@69: AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
Chris@69: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
Chris@69: ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
Chris@69: LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
Chris@69: CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
Chris@69: SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
Chris@69: INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
Chris@69: CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
Chris@69: ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
Chris@69: POSSIBILITY OF SUCH DAMAGE.
Chris@69: ***********************************************************************/
Chris@69: 
Chris@69: #ifdef HAVE_CONFIG_H
Chris@69: #include "config.h"
Chris@69: #endif
Chris@69: 
Chris@69: /***********************************************************
Chris@69: * Pitch analyser function
Chris@69: ********************************************************** */
Chris@69: #include "SigProc_FIX.h"
Chris@69: #include "pitch_est_defines.h"
Chris@69: 
Chris@69: void silk_decode_pitch(
Chris@69:     opus_int16                  lagIndex,           /* I                                                                */
Chris@69:     opus_int8                   contourIndex,       /* O                                                                */
Chris@69:     opus_int                    pitch_lags[],       /* O    4 pitch values                                              */
Chris@69:     const opus_int              Fs_kHz,             /* I    sampling frequency (kHz)                                    */
Chris@69:     const opus_int              nb_subfr            /* I    number of sub frames                                        */
Chris@69: )
Chris@69: {
Chris@69:     opus_int   lag, k, min_lag, max_lag, cbk_size;
Chris@69:     const opus_int8 *Lag_CB_ptr;
Chris@69: 
Chris@69:     if( Fs_kHz == 8 ) {
Chris@69:         if( nb_subfr == PE_MAX_NB_SUBFR ) {
Chris@69:             Lag_CB_ptr = &silk_CB_lags_stage2[ 0 ][ 0 ];
Chris@69:             cbk_size   = PE_NB_CBKS_STAGE2_EXT;
Chris@69:         } else {
Chris@69:             celt_assert( nb_subfr == PE_MAX_NB_SUBFR >> 1 );
Chris@69:             Lag_CB_ptr = &silk_CB_lags_stage2_10_ms[ 0 ][ 0 ];
Chris@69:             cbk_size   = PE_NB_CBKS_STAGE2_10MS;
Chris@69:         }
Chris@69:     } else {
Chris@69:         if( nb_subfr == PE_MAX_NB_SUBFR ) {
Chris@69:             Lag_CB_ptr = &silk_CB_lags_stage3[ 0 ][ 0 ];
Chris@69:             cbk_size   = PE_NB_CBKS_STAGE3_MAX;
Chris@69:         } else {
Chris@69:             celt_assert( nb_subfr == PE_MAX_NB_SUBFR >> 1 );
Chris@69:             Lag_CB_ptr = &silk_CB_lags_stage3_10_ms[ 0 ][ 0 ];
Chris@69:             cbk_size   = PE_NB_CBKS_STAGE3_10MS;
Chris@69:         }
Chris@69:     }
Chris@69: 
Chris@69:     min_lag = silk_SMULBB( PE_MIN_LAG_MS, Fs_kHz );
Chris@69:     max_lag = silk_SMULBB( PE_MAX_LAG_MS, Fs_kHz );
Chris@69:     lag = min_lag + lagIndex;
Chris@69: 
Chris@69:     for( k = 0; k < nb_subfr; k++ ) {
Chris@69:         pitch_lags[ k ] = lag + matrix_ptr( Lag_CB_ptr, k, contourIndex, cbk_size );
Chris@69:         pitch_lags[ k ] = silk_LIMIT( pitch_lags[ k ], min_lag, max_lag );
Chris@69:     }
Chris@69: }