cannam@154: /***********************************************************************
cannam@154: Copyright (c) 2006-2011, Skype Limited. All rights reserved.
cannam@154: Redistribution and use in source and binary forms, with or without
cannam@154: modification, are permitted provided that the following conditions
cannam@154: are met:
cannam@154: - Redistributions of source code must retain the above copyright notice,
cannam@154: this list of conditions and the following disclaimer.
cannam@154: - Redistributions in binary form must reproduce the above copyright
cannam@154: notice, this list of conditions and the following disclaimer in the
cannam@154: documentation and/or other materials provided with the distribution.
cannam@154: - Neither the name of Internet Society, IETF or IETF Trust, nor the
cannam@154: names of specific contributors, may be used to endorse or promote
cannam@154: products derived from this software without specific prior written
cannam@154: permission.
cannam@154: THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
cannam@154: AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
cannam@154: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
cannam@154: ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
cannam@154: LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
cannam@154: CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
cannam@154: SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
cannam@154: INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
cannam@154: CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
cannam@154: ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
cannam@154: POSSIBILITY OF SUCH DAMAGE.
cannam@154: ***********************************************************************/
cannam@154: 
cannam@154: #ifdef HAVE_CONFIG_H
cannam@154: #include "config.h"
cannam@154: #endif
cannam@154: 
cannam@154: /***********************************************************
cannam@154: * Pitch analyser function
cannam@154: ********************************************************** */
cannam@154: #include "SigProc_FIX.h"
cannam@154: #include "pitch_est_defines.h"
cannam@154: 
cannam@154: void silk_decode_pitch(
cannam@154:     opus_int16                  lagIndex,           /* I                                                                */
cannam@154:     opus_int8                   contourIndex,       /* O                                                                */
cannam@154:     opus_int                    pitch_lags[],       /* O    4 pitch values                                              */
cannam@154:     const opus_int              Fs_kHz,             /* I    sampling frequency (kHz)                                    */
cannam@154:     const opus_int              nb_subfr            /* I    number of sub frames                                        */
cannam@154: )
cannam@154: {
cannam@154:     opus_int   lag, k, min_lag, max_lag, cbk_size;
cannam@154:     const opus_int8 *Lag_CB_ptr;
cannam@154: 
cannam@154:     if( Fs_kHz == 8 ) {
cannam@154:         if( nb_subfr == PE_MAX_NB_SUBFR ) {
cannam@154:             Lag_CB_ptr = &silk_CB_lags_stage2[ 0 ][ 0 ];
cannam@154:             cbk_size   = PE_NB_CBKS_STAGE2_EXT;
cannam@154:         } else {
cannam@154:             celt_assert( nb_subfr == PE_MAX_NB_SUBFR >> 1 );
cannam@154:             Lag_CB_ptr = &silk_CB_lags_stage2_10_ms[ 0 ][ 0 ];
cannam@154:             cbk_size   = PE_NB_CBKS_STAGE2_10MS;
cannam@154:         }
cannam@154:     } else {
cannam@154:         if( nb_subfr == PE_MAX_NB_SUBFR ) {
cannam@154:             Lag_CB_ptr = &silk_CB_lags_stage3[ 0 ][ 0 ];
cannam@154:             cbk_size   = PE_NB_CBKS_STAGE3_MAX;
cannam@154:         } else {
cannam@154:             celt_assert( nb_subfr == PE_MAX_NB_SUBFR >> 1 );
cannam@154:             Lag_CB_ptr = &silk_CB_lags_stage3_10_ms[ 0 ][ 0 ];
cannam@154:             cbk_size   = PE_NB_CBKS_STAGE3_10MS;
cannam@154:         }
cannam@154:     }
cannam@154: 
cannam@154:     min_lag = silk_SMULBB( PE_MIN_LAG_MS, Fs_kHz );
cannam@154:     max_lag = silk_SMULBB( PE_MAX_LAG_MS, Fs_kHz );
cannam@154:     lag = min_lag + lagIndex;
cannam@154: 
cannam@154:     for( k = 0; k < nb_subfr; k++ ) {
cannam@154:         pitch_lags[ k ] = lag + matrix_ptr( Lag_CB_ptr, k, contourIndex, cbk_size );
cannam@154:         pitch_lags[ k ] = silk_LIMIT( pitch_lags[ k ], min_lag, max_lag );
cannam@154:     }
cannam@154: }