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1 /***********************************************************************
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2 Copyright (c) 2006-2011, Skype Limited. All rights reserved.
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3 Redistribution and use in source and binary forms, with or without
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4 modification, are permitted provided that the following conditions
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5 are met:
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6 - Redistributions of source code must retain the above copyright notice,
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7 this list of conditions and the following disclaimer.
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8 - Redistributions in binary form must reproduce the above copyright
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9 notice, this list of conditions and the following disclaimer in the
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10 documentation and/or other materials provided with the distribution.
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11 - Neither the name of Internet Society, IETF or IETF Trust, nor the
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12 names of specific contributors, may be used to endorse or promote
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13 products derived from this software without specific prior written
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14 permission.
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15 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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16 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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17 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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18 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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19 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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20 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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21 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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22 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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23 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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24 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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25 POSSIBILITY OF SUCH DAMAGE.
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26 ***********************************************************************/
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27
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28 #ifdef HAVE_CONFIG_H
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29 #include "config.h"
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30 #endif
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31
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32 /***********************************************************
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33 * Pitch analyser function
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34 ********************************************************** */
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35 #include "SigProc_FIX.h"
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36 #include "pitch_est_defines.h"
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37
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38 void silk_decode_pitch(
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39 opus_int16 lagIndex, /* I */
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40 opus_int8 contourIndex, /* O */
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41 opus_int pitch_lags[], /* O 4 pitch values */
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42 const opus_int Fs_kHz, /* I sampling frequency (kHz) */
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43 const opus_int nb_subfr /* I number of sub frames */
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44 )
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45 {
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46 opus_int lag, k, min_lag, max_lag, cbk_size;
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47 const opus_int8 *Lag_CB_ptr;
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48
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49 if( Fs_kHz == 8 ) {
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50 if( nb_subfr == PE_MAX_NB_SUBFR ) {
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51 Lag_CB_ptr = &silk_CB_lags_stage2[ 0 ][ 0 ];
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52 cbk_size = PE_NB_CBKS_STAGE2_EXT;
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53 } else {
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54 celt_assert( nb_subfr == PE_MAX_NB_SUBFR >> 1 );
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55 Lag_CB_ptr = &silk_CB_lags_stage2_10_ms[ 0 ][ 0 ];
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56 cbk_size = PE_NB_CBKS_STAGE2_10MS;
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57 }
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58 } else {
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59 if( nb_subfr == PE_MAX_NB_SUBFR ) {
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60 Lag_CB_ptr = &silk_CB_lags_stage3[ 0 ][ 0 ];
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61 cbk_size = PE_NB_CBKS_STAGE3_MAX;
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62 } else {
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63 celt_assert( nb_subfr == PE_MAX_NB_SUBFR >> 1 );
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64 Lag_CB_ptr = &silk_CB_lags_stage3_10_ms[ 0 ][ 0 ];
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65 cbk_size = PE_NB_CBKS_STAGE3_10MS;
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66 }
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67 }
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68
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69 min_lag = silk_SMULBB( PE_MIN_LAG_MS, Fs_kHz );
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70 max_lag = silk_SMULBB( PE_MAX_LAG_MS, Fs_kHz );
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71 lag = min_lag + lagIndex;
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72
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73 for( k = 0; k < nb_subfr; k++ ) {
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74 pitch_lags[ k ] = lag + matrix_ptr( Lag_CB_ptr, k, contourIndex, cbk_size );
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75 pitch_lags[ k ] = silk_LIMIT( pitch_lags[ k ], min_lag, max_lag );
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76 }
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77 }
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