Line data    Source code

       1             : /***********************************************************************
       2             : Copyright (c) 2006-2011, Skype Limited. All rights reserved.
       3             : Redistribution and use in source and binary forms, with or without
       4             : modification, are permitted provided that the following conditions
       5             : are met:
       6             : - Redistributions of source code must retain the above copyright notice,
       7             : this list of conditions and the following disclaimer.
       8             : - Redistributions in binary form must reproduce the above copyright
       9             : notice, this list of conditions and the following disclaimer in the
      10             : documentation and/or other materials provided with the distribution.
      11             : - Neither the name of Internet Society, IETF or IETF Trust, nor the
      12             : names of specific contributors, may be used to endorse or promote
      13             : products derived from this software without specific prior written
      14             : permission.
      15             : THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
      16             : AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
      17             : IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
      18             : ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
      19             : LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
      20             : CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
      21             : SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
      22             : INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
      23             : CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
      24             : ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
      25             : POSSIBILITY OF SUCH DAMAGE.
      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             : 
      38           0 : 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           0 :     if( Fs_kHz == 8 ) {
      50           0 :         if( nb_subfr == PE_MAX_NB_SUBFR ) {
      51           0 :             Lag_CB_ptr = &silk_CB_lags_stage2[ 0 ][ 0 ];
      52           0 :             cbk_size   = PE_NB_CBKS_STAGE2_EXT;
      53             :         } else {
      54           0 :             silk_assert( nb_subfr == PE_MAX_NB_SUBFR >> 1 );
      55           0 :             Lag_CB_ptr = &silk_CB_lags_stage2_10_ms[ 0 ][ 0 ];
      56           0 :             cbk_size   = PE_NB_CBKS_STAGE2_10MS;
      57             :         }
      58             :     } else {
      59           0 :         if( nb_subfr == PE_MAX_NB_SUBFR ) {
      60           0 :             Lag_CB_ptr = &silk_CB_lags_stage3[ 0 ][ 0 ];
      61           0 :             cbk_size   = PE_NB_CBKS_STAGE3_MAX;
      62             :         } else {
      63           0 :             silk_assert( nb_subfr == PE_MAX_NB_SUBFR >> 1 );
      64           0 :             Lag_CB_ptr = &silk_CB_lags_stage3_10_ms[ 0 ][ 0 ];
      65           0 :             cbk_size   = PE_NB_CBKS_STAGE3_10MS;
      66             :         }
      67             :     }
      68             : 
      69           0 :     min_lag = silk_SMULBB( PE_MIN_LAG_MS, Fs_kHz );
      70           0 :     max_lag = silk_SMULBB( PE_MAX_LAG_MS, Fs_kHz );
      71           0 :     lag = min_lag + lagIndex;
      72             : 
      73           0 :     for( k = 0; k < nb_subfr; k++ ) {
      74           0 :         pitch_lags[ k ] = lag + matrix_ptr( Lag_CB_ptr, k, contourIndex, cbk_size );
      75           0 :         pitch_lags[ k ] = silk_LIMIT( pitch_lags[ k ], min_lag, max_lag );
      76             :     }
      77           0 : }