46ae64cd60
This reverts commit e00426c512.
The way we handle platform-specific intrinsics is not good, so the
current state will not compile on armv8. This commit also requires
SSE4.1 support, which is likely not a good idea for portable binaries.
We'll have to redo this with more caution after 3.2 is released, or
we might simply drop opus as we're only using it as dependency for
theora right now.
Fixes #33606.
118 lines
5.9 KiB
C
118 lines
5.9 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_FLP.h"
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/* Find LPC and LTP coefficients */
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void silk_find_pred_coefs_FLP(
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silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
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silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
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const silk_float res_pitch[], /* I Residual from pitch analysis */
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const silk_float x[], /* I Speech signal */
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opus_int condCoding /* I The type of conditional coding to use */
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)
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{
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opus_int i;
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silk_float WLTP[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ];
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silk_float invGains[ MAX_NB_SUBFR ], Wght[ MAX_NB_SUBFR ];
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opus_int16 NLSF_Q15[ MAX_LPC_ORDER ];
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const silk_float *x_ptr;
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silk_float *x_pre_ptr, LPC_in_pre[ MAX_NB_SUBFR * MAX_LPC_ORDER + MAX_FRAME_LENGTH ];
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silk_float minInvGain;
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/* Weighting for weighted least squares */
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for( i = 0; i < psEnc->sCmn.nb_subfr; i++ ) {
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silk_assert( psEncCtrl->Gains[ i ] > 0.0f );
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invGains[ i ] = 1.0f / psEncCtrl->Gains[ i ];
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Wght[ i ] = invGains[ i ] * invGains[ i ];
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}
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if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) {
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/**********/
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/* VOICED */
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/**********/
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silk_assert( psEnc->sCmn.ltp_mem_length - psEnc->sCmn.predictLPCOrder >= psEncCtrl->pitchL[ 0 ] + LTP_ORDER / 2 );
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/* LTP analysis */
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silk_find_LTP_FLP( psEncCtrl->LTPCoef, WLTP, &psEncCtrl->LTPredCodGain, res_pitch,
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psEncCtrl->pitchL, Wght, psEnc->sCmn.subfr_length, psEnc->sCmn.nb_subfr, psEnc->sCmn.ltp_mem_length );
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/* Quantize LTP gain parameters */
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silk_quant_LTP_gains_FLP( psEncCtrl->LTPCoef, psEnc->sCmn.indices.LTPIndex, &psEnc->sCmn.indices.PERIndex,
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&psEnc->sCmn.sum_log_gain_Q7, WLTP, psEnc->sCmn.mu_LTP_Q9, psEnc->sCmn.LTPQuantLowComplexity, psEnc->sCmn.nb_subfr,
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psEnc->sCmn.arch );
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/* Control LTP scaling */
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silk_LTP_scale_ctrl_FLP( psEnc, psEncCtrl, condCoding );
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/* Create LTP residual */
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silk_LTP_analysis_filter_FLP( LPC_in_pre, x - psEnc->sCmn.predictLPCOrder, psEncCtrl->LTPCoef,
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psEncCtrl->pitchL, invGains, psEnc->sCmn.subfr_length, psEnc->sCmn.nb_subfr, psEnc->sCmn.predictLPCOrder );
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} else {
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/************/
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/* UNVOICED */
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/************/
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/* Create signal with prepended subframes, scaled by inverse gains */
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x_ptr = x - psEnc->sCmn.predictLPCOrder;
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x_pre_ptr = LPC_in_pre;
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for( i = 0; i < psEnc->sCmn.nb_subfr; i++ ) {
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silk_scale_copy_vector_FLP( x_pre_ptr, x_ptr, invGains[ i ],
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psEnc->sCmn.subfr_length + psEnc->sCmn.predictLPCOrder );
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x_pre_ptr += psEnc->sCmn.subfr_length + psEnc->sCmn.predictLPCOrder;
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x_ptr += psEnc->sCmn.subfr_length;
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}
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silk_memset( psEncCtrl->LTPCoef, 0, psEnc->sCmn.nb_subfr * LTP_ORDER * sizeof( silk_float ) );
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psEncCtrl->LTPredCodGain = 0.0f;
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psEnc->sCmn.sum_log_gain_Q7 = 0;
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}
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/* Limit on total predictive coding gain */
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if( psEnc->sCmn.first_frame_after_reset ) {
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minInvGain = 1.0f / MAX_PREDICTION_POWER_GAIN_AFTER_RESET;
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} else {
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minInvGain = (silk_float)pow( 2, psEncCtrl->LTPredCodGain / 3 ) / MAX_PREDICTION_POWER_GAIN;
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minInvGain /= 0.25f + 0.75f * psEncCtrl->coding_quality;
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}
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/* LPC_in_pre contains the LTP-filtered input for voiced, and the unfiltered input for unvoiced */
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silk_find_LPC_FLP( &psEnc->sCmn, NLSF_Q15, LPC_in_pre, minInvGain );
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/* Quantize LSFs */
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silk_process_NLSFs_FLP( &psEnc->sCmn, psEncCtrl->PredCoef, NLSF_Q15, psEnc->sCmn.prev_NLSFq_Q15 );
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/* Calculate residual energy using quantized LPC coefficients */
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silk_residual_energy_FLP( psEncCtrl->ResNrg, LPC_in_pre, psEncCtrl->PredCoef, psEncCtrl->Gains,
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psEnc->sCmn.subfr_length, psEnc->sCmn.nb_subfr, psEnc->sCmn.predictLPCOrder );
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/* Copy to prediction struct for use in next frame for interpolation */
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silk_memcpy( psEnc->sCmn.prev_NLSFq_Q15, NLSF_Q15, sizeof( psEnc->sCmn.prev_NLSFq_Q15 ) );
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}
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