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