diff options
Diffstat (limited to 'src/opus-1.0.2/silk/float/residual_energy_FLP.c')
| -rw-r--r-- | src/opus-1.0.2/silk/float/residual_energy_FLP.c | 117 |
1 files changed, 0 insertions, 117 deletions
diff --git a/src/opus-1.0.2/silk/float/residual_energy_FLP.c b/src/opus-1.0.2/silk/float/residual_energy_FLP.c deleted file mode 100644 index e65457ab..00000000 --- a/src/opus-1.0.2/silk/float/residual_energy_FLP.c +++ /dev/null @@ -1,117 +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_FLP.h" - -#define MAX_ITERATIONS_RESIDUAL_NRG 10 -#define REGULARIZATION_FACTOR 1e-8f - -/* Residual energy: nrg = wxx - 2 * wXx * c + c' * wXX * c */ -silk_float silk_residual_energy_covar_FLP( /* O Weighted residual energy */ - const silk_float *c, /* I Filter coefficients */ - silk_float *wXX, /* I/O Weighted correlation matrix, reg. out */ - const silk_float *wXx, /* I Weighted correlation vector */ - const silk_float wxx, /* I Weighted correlation value */ - const opus_int D /* I Dimension */ -) -{ - opus_int i, j, k; - silk_float tmp, nrg = 0.0f, regularization; - - /* Safety checks */ - silk_assert( D >= 0 ); - - regularization = REGULARIZATION_FACTOR * ( wXX[ 0 ] + wXX[ D * D - 1 ] ); - for( k = 0; k < MAX_ITERATIONS_RESIDUAL_NRG; k++ ) { - nrg = wxx; - - tmp = 0.0f; - for( i = 0; i < D; i++ ) { - tmp += wXx[ i ] * c[ i ]; - } - nrg -= 2.0f * tmp; - - /* compute c' * wXX * c, assuming wXX is symmetric */ - for( i = 0; i < D; i++ ) { - tmp = 0.0f; - for( j = i + 1; j < D; j++ ) { - tmp += matrix_c_ptr( wXX, i, j, D ) * c[ j ]; - } - nrg += c[ i ] * ( 2.0f * tmp + matrix_c_ptr( wXX, i, i, D ) * c[ i ] ); - } - if( nrg > 0 ) { - break; - } else { - /* Add white noise */ - for( i = 0; i < D; i++ ) { - matrix_c_ptr( wXX, i, i, D ) += regularization; - } - /* Increase noise for next run */ - regularization *= 2.0f; - } - } - if( k == MAX_ITERATIONS_RESIDUAL_NRG ) { - silk_assert( nrg == 0 ); - nrg = 1.0f; - } - - return nrg; -} - -/* Calculates residual energies of input subframes where all subframes have LPC_order */ -/* of preceding samples */ -void silk_residual_energy_FLP( - silk_float nrgs[ MAX_NB_SUBFR ], /* O Residual energy per subframe */ - const silk_float x[], /* I Input signal */ - silk_float a[ 2 ][ MAX_LPC_ORDER ], /* I AR coefs for each frame half */ - const silk_float gains[], /* I Quantization gains */ - const opus_int subfr_length, /* I Subframe length */ - const opus_int nb_subfr, /* I number of subframes */ - const opus_int LPC_order /* I LPC order */ -) -{ - opus_int shift; - silk_float *LPC_res_ptr, LPC_res[ ( MAX_FRAME_LENGTH + MAX_NB_SUBFR * MAX_LPC_ORDER ) / 2 ]; - - LPC_res_ptr = LPC_res + LPC_order; - shift = LPC_order + subfr_length; - - /* Filter input to create the LPC residual for each frame half, and measure subframe energies */ - silk_LPC_analysis_filter_FLP( LPC_res, a[ 0 ], x + 0 * shift, 2 * shift, LPC_order ); - nrgs[ 0 ] = ( silk_float )( gains[ 0 ] * gains[ 0 ] * silk_energy_FLP( LPC_res_ptr + 0 * shift, subfr_length ) ); - nrgs[ 1 ] = ( silk_float )( gains[ 1 ] * gains[ 1 ] * silk_energy_FLP( LPC_res_ptr + 1 * shift, subfr_length ) ); - - if( nb_subfr == MAX_NB_SUBFR ) { - silk_LPC_analysis_filter_FLP( LPC_res, a[ 1 ], x + 2 * shift, 2 * shift, LPC_order ); - nrgs[ 2 ] = ( silk_float )( gains[ 2 ] * gains[ 2 ] * silk_energy_FLP( LPC_res_ptr + 0 * shift, subfr_length ) ); - nrgs[ 3 ] = ( silk_float )( gains[ 3 ] * gains[ 3 ] * silk_energy_FLP( LPC_res_ptr + 1 * shift, subfr_length ) ); - } -} |