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c152d602aa
This makes all remaining large stack allocations use the vararray
macros.
This continues the work of 6f2d9f50 to allow compiling with
NONTHREADSAFE_PSEUDOSTACK to move the memory for large buffers
off the stack for devices where it is very limited.
It also does this for some additional large buffers used by the
PLC in the decoder.
136 lines
6.4 KiB
C
136 lines
6.4 KiB
C
/***********************************************************************
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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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#include "main.h"
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#include "stack_alloc.h"
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/***********************/
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/* NLSF vector encoder */
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/***********************/
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opus_int32 silk_NLSF_encode( /* O Returns RD value in Q25 */
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opus_int8 *NLSFIndices, /* I Codebook path vector [ LPC_ORDER + 1 ] */
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opus_int16 *pNLSF_Q15, /* I/O Quantized NLSF vector [ LPC_ORDER ] */
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const silk_NLSF_CB_struct *psNLSF_CB, /* I Codebook object */
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const opus_int16 *pW_QW, /* I NLSF weight vector [ LPC_ORDER ] */
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const opus_int NLSF_mu_Q20, /* I Rate weight for the RD optimization */
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const opus_int nSurvivors, /* I Max survivors after first stage */
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const opus_int signalType /* I Signal type: 0/1/2 */
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)
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{
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opus_int i, s, ind1, bestIndex, prob_Q8, bits_q7;
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opus_int32 W_tmp_Q9;
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VARDECL( opus_int32, err_Q26 );
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VARDECL( opus_int32, RD_Q25 );
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VARDECL( opus_int, tempIndices1 );
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VARDECL( opus_int8, tempIndices2 );
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opus_int16 res_Q15[ MAX_LPC_ORDER ];
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opus_int16 res_Q10[ MAX_LPC_ORDER ];
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opus_int16 NLSF_tmp_Q15[ MAX_LPC_ORDER ];
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opus_int16 W_tmp_QW[ MAX_LPC_ORDER ];
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opus_int16 W_adj_Q5[ MAX_LPC_ORDER ];
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opus_uint8 pred_Q8[ MAX_LPC_ORDER ];
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opus_int16 ec_ix[ MAX_LPC_ORDER ];
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const opus_uint8 *pCB_element, *iCDF_ptr;
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SAVE_STACK;
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silk_assert( nSurvivors <= NLSF_VQ_MAX_SURVIVORS );
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silk_assert( signalType >= 0 && signalType <= 2 );
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silk_assert( NLSF_mu_Q20 <= 32767 && NLSF_mu_Q20 >= 0 );
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/* NLSF stabilization */
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silk_NLSF_stabilize( pNLSF_Q15, psNLSF_CB->deltaMin_Q15, psNLSF_CB->order );
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/* First stage: VQ */
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ALLOC( err_Q26, psNLSF_CB->nVectors, opus_int32 );
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silk_NLSF_VQ( err_Q26, pNLSF_Q15, psNLSF_CB->CB1_NLSF_Q8, psNLSF_CB->nVectors, psNLSF_CB->order );
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/* Sort the quantization errors */
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ALLOC( tempIndices1, nSurvivors, opus_int );
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silk_insertion_sort_increasing( err_Q26, tempIndices1, psNLSF_CB->nVectors, nSurvivors );
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ALLOC( RD_Q25, nSurvivors, opus_int32 );
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ALLOC( tempIndices2, nSurvivors * MAX_LPC_ORDER, opus_int8 );
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/* Loop over survivors */
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for( s = 0; s < nSurvivors; s++ ) {
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ind1 = tempIndices1[ s ];
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/* Residual after first stage */
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pCB_element = &psNLSF_CB->CB1_NLSF_Q8[ ind1 * psNLSF_CB->order ];
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for( i = 0; i < psNLSF_CB->order; i++ ) {
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NLSF_tmp_Q15[ i ] = silk_LSHIFT16( (opus_int16)pCB_element[ i ], 7 );
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res_Q15[ i ] = pNLSF_Q15[ i ] - NLSF_tmp_Q15[ i ];
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}
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/* Weights from codebook vector */
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silk_NLSF_VQ_weights_laroia( W_tmp_QW, NLSF_tmp_Q15, psNLSF_CB->order );
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/* Apply square-rooted weights */
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for( i = 0; i < psNLSF_CB->order; i++ ) {
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W_tmp_Q9 = silk_SQRT_APPROX( silk_LSHIFT( (opus_int32)W_tmp_QW[ i ], 18 - NLSF_W_Q ) );
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res_Q10[ i ] = (opus_int16)silk_RSHIFT( silk_SMULBB( res_Q15[ i ], W_tmp_Q9 ), 14 );
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}
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/* Modify input weights accordingly */
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for( i = 0; i < psNLSF_CB->order; i++ ) {
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W_adj_Q5[ i ] = silk_DIV32_16( silk_LSHIFT( (opus_int32)pW_QW[ i ], 5 ), W_tmp_QW[ i ] );
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}
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/* Unpack entropy table indices and predictor for current CB1 index */
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silk_NLSF_unpack( ec_ix, pred_Q8, psNLSF_CB, ind1 );
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/* Trellis quantizer */
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RD_Q25[ s ] = silk_NLSF_del_dec_quant( &tempIndices2[ s * MAX_LPC_ORDER ], res_Q10, W_adj_Q5, pred_Q8, ec_ix,
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psNLSF_CB->ec_Rates_Q5, psNLSF_CB->quantStepSize_Q16, psNLSF_CB->invQuantStepSize_Q6, NLSF_mu_Q20, psNLSF_CB->order );
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/* Add rate for first stage */
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iCDF_ptr = &psNLSF_CB->CB1_iCDF[ ( signalType >> 1 ) * psNLSF_CB->nVectors ];
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if( ind1 == 0 ) {
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prob_Q8 = 256 - iCDF_ptr[ ind1 ];
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} else {
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prob_Q8 = iCDF_ptr[ ind1 - 1 ] - iCDF_ptr[ ind1 ];
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}
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bits_q7 = ( 8 << 7 ) - silk_lin2log( prob_Q8 );
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RD_Q25[ s ] = silk_SMLABB( RD_Q25[ s ], bits_q7, silk_RSHIFT( NLSF_mu_Q20, 2 ) );
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}
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/* Find the lowest rate-distortion error */
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silk_insertion_sort_increasing( RD_Q25, &bestIndex, nSurvivors, 1 );
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NLSFIndices[ 0 ] = (opus_int8)tempIndices1[ bestIndex ];
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silk_memcpy( &NLSFIndices[ 1 ], &tempIndices2[ bestIndex * MAX_LPC_ORDER ], psNLSF_CB->order * sizeof( opus_int8 ) );
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/* Decode */
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silk_NLSF_decode( pNLSF_Q15, NLSFIndices, psNLSF_CB );
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return RD_Q25[ 0 ];
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RESTORE_STACK;
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}
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