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77 lines
3.6 KiB
77 lines
3.6 KiB
/*********************************************************************** |
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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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celt_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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celt_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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