diff options
Diffstat (limited to 'src/opus-1.0.2/silk/NLSF_encode.c')
| -rw-r--r-- | src/opus-1.0.2/silk/NLSF_encode.c | 128 |
1 files changed, 0 insertions, 128 deletions
diff --git a/src/opus-1.0.2/silk/NLSF_encode.c b/src/opus-1.0.2/silk/NLSF_encode.c deleted file mode 100644 index 52a263d9..00000000 --- a/src/opus-1.0.2/silk/NLSF_encode.c +++ /dev/null @@ -1,128 +0,0 @@ -/*********************************************************************** -Copyright (c) 2006-2011, Skype Limited. All rights reserved. -Redistribution and use in source and binary forms, with or without -modification, are permitted provided that the following conditions -are met: -- Redistributions of source code must retain the above copyright notice, -this list of conditions and the following disclaimer. -- Redistributions in binary form must reproduce the above copyright -notice, this list of conditions and the following disclaimer in the -documentation and/or other materials provided with the distribution. -- Neither the name of Internet Society, IETF or IETF Trust, nor the -names of specific contributors, may be used to endorse or promote -products derived from this software without specific prior written -permission. -THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS “AS IS” -AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE -LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR -CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF -SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS -INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN -CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) -ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE -POSSIBILITY OF SUCH DAMAGE. -***********************************************************************/ - -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif - -#include "main.h" - -/***********************/ -/* NLSF vector encoder */ -/***********************/ -opus_int32 silk_NLSF_encode( /* O Returns RD value in Q25 */ - opus_int8 *NLSFIndices, /* I Codebook path vector [ LPC_ORDER + 1 ] */ - opus_int16 *pNLSF_Q15, /* I/O Quantized NLSF vector [ LPC_ORDER ] */ - const silk_NLSF_CB_struct *psNLSF_CB, /* I Codebook object */ - const opus_int16 *pW_QW, /* I NLSF weight vector [ LPC_ORDER ] */ - const opus_int NLSF_mu_Q20, /* I Rate weight for the RD optimization */ - const opus_int nSurvivors, /* I Max survivors after first stage */ - const opus_int signalType /* I Signal type: 0/1/2 */ -) -{ - opus_int i, s, ind1, bestIndex, prob_Q8, bits_q7; - opus_int32 W_tmp_Q9; - opus_int32 err_Q26[ NLSF_VQ_MAX_VECTORS ]; - opus_int32 RD_Q25[ NLSF_VQ_MAX_SURVIVORS ]; - opus_int tempIndices1[ NLSF_VQ_MAX_SURVIVORS ]; - opus_int8 tempIndices2[ NLSF_VQ_MAX_SURVIVORS * MAX_LPC_ORDER ]; - opus_int16 res_Q15[ MAX_LPC_ORDER ]; - opus_int16 res_Q10[ MAX_LPC_ORDER ]; - opus_int16 NLSF_tmp_Q15[ MAX_LPC_ORDER ]; - opus_int16 W_tmp_QW[ MAX_LPC_ORDER ]; - opus_int16 W_adj_Q5[ MAX_LPC_ORDER ]; - opus_uint8 pred_Q8[ MAX_LPC_ORDER ]; - opus_int16 ec_ix[ MAX_LPC_ORDER ]; - const opus_uint8 *pCB_element, *iCDF_ptr; - - silk_assert( nSurvivors <= NLSF_VQ_MAX_SURVIVORS ); - silk_assert( signalType >= 0 && signalType <= 2 ); - silk_assert( NLSF_mu_Q20 <= 32767 && NLSF_mu_Q20 >= 0 ); - - /* NLSF stabilization */ - silk_NLSF_stabilize( pNLSF_Q15, psNLSF_CB->deltaMin_Q15, psNLSF_CB->order ); - - /* First stage: VQ */ - silk_NLSF_VQ( err_Q26, pNLSF_Q15, psNLSF_CB->CB1_NLSF_Q8, psNLSF_CB->nVectors, psNLSF_CB->order ); - - /* Sort the quantization errors */ - silk_insertion_sort_increasing( err_Q26, tempIndices1, psNLSF_CB->nVectors, nSurvivors ); - - /* Loop over survivors */ - for( s = 0; s < nSurvivors; s++ ) { - ind1 = tempIndices1[ s ]; - - /* Residual after first stage */ - pCB_element = &psNLSF_CB->CB1_NLSF_Q8[ ind1 * psNLSF_CB->order ]; - for( i = 0; i < psNLSF_CB->order; i++ ) { - NLSF_tmp_Q15[ i ] = silk_LSHIFT16( (opus_int16)pCB_element[ i ], 7 ); - res_Q15[ i ] = pNLSF_Q15[ i ] - NLSF_tmp_Q15[ i ]; - } - - /* Weights from codebook vector */ - silk_NLSF_VQ_weights_laroia( W_tmp_QW, NLSF_tmp_Q15, psNLSF_CB->order ); - - /* Apply square-rooted weights */ - for( i = 0; i < psNLSF_CB->order; i++ ) { - W_tmp_Q9 = silk_SQRT_APPROX( silk_LSHIFT( (opus_int32)W_tmp_QW[ i ], 18 - NLSF_W_Q ) ); - res_Q10[ i ] = (opus_int16)silk_RSHIFT( silk_SMULBB( res_Q15[ i ], W_tmp_Q9 ), 14 ); - } - - /* Modify input weights accordingly */ - for( i = 0; i < psNLSF_CB->order; i++ ) { - W_adj_Q5[ i ] = silk_DIV32_16( silk_LSHIFT( (opus_int32)pW_QW[ i ], 5 ), W_tmp_QW[ i ] ); - } - - /* Unpack entropy table indices and predictor for current CB1 index */ - silk_NLSF_unpack( ec_ix, pred_Q8, psNLSF_CB, ind1 ); - - /* Trellis quantizer */ - RD_Q25[ s ] = silk_NLSF_del_dec_quant( &tempIndices2[ s * MAX_LPC_ORDER ], res_Q10, W_adj_Q5, pred_Q8, ec_ix, - psNLSF_CB->ec_Rates_Q5, psNLSF_CB->quantStepSize_Q16, psNLSF_CB->invQuantStepSize_Q6, NLSF_mu_Q20, psNLSF_CB->order ); - - /* Add rate for first stage */ - iCDF_ptr = &psNLSF_CB->CB1_iCDF[ ( signalType >> 1 ) * psNLSF_CB->nVectors ]; - if( ind1 == 0 ) { - prob_Q8 = 256 - iCDF_ptr[ ind1 ]; - } else { - prob_Q8 = iCDF_ptr[ ind1 - 1 ] - iCDF_ptr[ ind1 ]; - } - bits_q7 = ( 8 << 7 ) - silk_lin2log( prob_Q8 ); - RD_Q25[ s ] = silk_SMLABB( RD_Q25[ s ], bits_q7, silk_RSHIFT( NLSF_mu_Q20, 2 ) ); - } - - /* Find the lowest rate-distortion error */ - silk_insertion_sort_increasing( RD_Q25, &bestIndex, nSurvivors, 1 ); - - NLSFIndices[ 0 ] = (opus_int8)tempIndices1[ bestIndex ]; - silk_memcpy( &NLSFIndices[ 1 ], &tempIndices2[ bestIndex * MAX_LPC_ORDER ], psNLSF_CB->order * sizeof( opus_int8 ) ); - - /* Decode */ - silk_NLSF_decode( pNLSF_Q15, NLSFIndices, psNLSF_CB ); - - return RD_Q25[ 0 ]; -} |