1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/media/libopus/silk/decode_pitch.c Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,77 @@
1.4 +/***********************************************************************
1.5 +Copyright (c) 2006-2011, Skype Limited. All rights reserved.
1.6 +Redistribution and use in source and binary forms, with or without
1.7 +modification, are permitted provided that the following conditions
1.8 +are met:
1.9 +- Redistributions of source code must retain the above copyright notice,
1.10 +this list of conditions and the following disclaimer.
1.11 +- Redistributions in binary form must reproduce the above copyright
1.12 +notice, this list of conditions and the following disclaimer in the
1.13 +documentation and/or other materials provided with the distribution.
1.14 +- Neither the name of Internet Society, IETF or IETF Trust, nor the
1.15 +names of specific contributors, may be used to endorse or promote
1.16 +products derived from this software without specific prior written
1.17 +permission.
1.18 +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
1.19 +AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
1.20 +IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
1.21 +ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
1.22 +LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
1.23 +CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
1.24 +SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
1.25 +INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
1.26 +CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
1.27 +ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
1.28 +POSSIBILITY OF SUCH DAMAGE.
1.29 +***********************************************************************/
1.30 +
1.31 +#ifdef HAVE_CONFIG_H
1.32 +#include "config.h"
1.33 +#endif
1.34 +
1.35 +/***********************************************************
1.36 +* Pitch analyser function
1.37 +********************************************************** */
1.38 +#include "SigProc_FIX.h"
1.39 +#include "pitch_est_defines.h"
1.40 +
1.41 +void silk_decode_pitch(
1.42 + opus_int16 lagIndex, /* I */
1.43 + opus_int8 contourIndex, /* O */
1.44 + opus_int pitch_lags[], /* O 4 pitch values */
1.45 + const opus_int Fs_kHz, /* I sampling frequency (kHz) */
1.46 + const opus_int nb_subfr /* I number of sub frames */
1.47 +)
1.48 +{
1.49 + opus_int lag, k, min_lag, max_lag, cbk_size;
1.50 + const opus_int8 *Lag_CB_ptr;
1.51 +
1.52 + if( Fs_kHz == 8 ) {
1.53 + if( nb_subfr == PE_MAX_NB_SUBFR ) {
1.54 + Lag_CB_ptr = &silk_CB_lags_stage2[ 0 ][ 0 ];
1.55 + cbk_size = PE_NB_CBKS_STAGE2_EXT;
1.56 + } else {
1.57 + silk_assert( nb_subfr == PE_MAX_NB_SUBFR >> 1 );
1.58 + Lag_CB_ptr = &silk_CB_lags_stage2_10_ms[ 0 ][ 0 ];
1.59 + cbk_size = PE_NB_CBKS_STAGE2_10MS;
1.60 + }
1.61 + } else {
1.62 + if( nb_subfr == PE_MAX_NB_SUBFR ) {
1.63 + Lag_CB_ptr = &silk_CB_lags_stage3[ 0 ][ 0 ];
1.64 + cbk_size = PE_NB_CBKS_STAGE3_MAX;
1.65 + } else {
1.66 + silk_assert( nb_subfr == PE_MAX_NB_SUBFR >> 1 );
1.67 + Lag_CB_ptr = &silk_CB_lags_stage3_10_ms[ 0 ][ 0 ];
1.68 + cbk_size = PE_NB_CBKS_STAGE3_10MS;
1.69 + }
1.70 + }
1.71 +
1.72 + min_lag = silk_SMULBB( PE_MIN_LAG_MS, Fs_kHz );
1.73 + max_lag = silk_SMULBB( PE_MAX_LAG_MS, Fs_kHz );
1.74 + lag = min_lag + lagIndex;
1.75 +
1.76 + for( k = 0; k < nb_subfr; k++ ) {
1.77 + pitch_lags[ k ] = lag + matrix_ptr( Lag_CB_ptr, k, contourIndex, cbk_size );
1.78 + pitch_lags[ k ] = silk_LIMIT( pitch_lags[ k ], min_lag, max_lag );
1.79 + }
1.80 +}
