995dcb610c
Took the opportunity to undo the Godot changed made to the
opus source. The opus module should eventually be built in its
own environment to avoid polluting others with too many include
dirs and defines.
TODO: Fix the platform/ stuff for opus.
(cherry picked from commit d9a291f641)
speex module was only added while cherry-picking, as speex is removed
in the master branch but we don't want to break compatibility in 2.1.x.
Unbundling wasn't done as the module uses the internal speex_free,
so it would require some more work.
148 lines
7.6 KiB
C
148 lines
7.6 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_FIX.h"
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#include "stack_alloc.h"
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void silk_find_pred_coefs_FIX(
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silk_encoder_state_FIX *psEnc, /* I/O encoder state */
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silk_encoder_control_FIX *psEncCtrl, /* I/O encoder control */
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const opus_int16 res_pitch[], /* I Residual from pitch analysis */
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const opus_int16 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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opus_int32 invGains_Q16[ MAX_NB_SUBFR ], local_gains[ MAX_NB_SUBFR ], Wght_Q15[ MAX_NB_SUBFR ];
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opus_int16 NLSF_Q15[ MAX_LPC_ORDER ];
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const opus_int16 *x_ptr;
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opus_int16 *x_pre_ptr;
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VARDECL( opus_int16, LPC_in_pre );
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opus_int32 tmp, min_gain_Q16, minInvGain_Q30;
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opus_int LTP_corrs_rshift[ MAX_NB_SUBFR ];
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SAVE_STACK;
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/* weighting for weighted least squares */
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min_gain_Q16 = silk_int32_MAX >> 6;
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for( i = 0; i < psEnc->sCmn.nb_subfr; i++ ) {
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min_gain_Q16 = silk_min( min_gain_Q16, psEncCtrl->Gains_Q16[ i ] );
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}
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for( i = 0; i < psEnc->sCmn.nb_subfr; i++ ) {
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/* Divide to Q16 */
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silk_assert( psEncCtrl->Gains_Q16[ i ] > 0 );
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/* Invert and normalize gains, and ensure that maximum invGains_Q16 is within range of a 16 bit int */
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invGains_Q16[ i ] = silk_DIV32_varQ( min_gain_Q16, psEncCtrl->Gains_Q16[ i ], 16 - 2 );
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/* Ensure Wght_Q15 a minimum value 1 */
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invGains_Q16[ i ] = silk_max( invGains_Q16[ i ], 363 );
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/* Square the inverted gains */
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silk_assert( invGains_Q16[ i ] == silk_SAT16( invGains_Q16[ i ] ) );
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tmp = silk_SMULWB( invGains_Q16[ i ], invGains_Q16[ i ] );
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Wght_Q15[ i ] = silk_RSHIFT( tmp, 1 );
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/* Invert the inverted and normalized gains */
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local_gains[ i ] = silk_DIV32( ( (opus_int32)1 << 16 ), invGains_Q16[ i ] );
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}
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ALLOC( LPC_in_pre,
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psEnc->sCmn.nb_subfr * psEnc->sCmn.predictLPCOrder
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+ psEnc->sCmn.frame_length, opus_int16 );
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if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) {
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VARDECL( opus_int32, WLTP );
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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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ALLOC( WLTP, psEnc->sCmn.nb_subfr * LTP_ORDER * LTP_ORDER, opus_int32 );
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/* LTP analysis */
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silk_find_LTP_FIX( psEncCtrl->LTPCoef_Q14, WLTP, &psEncCtrl->LTPredCodGain_Q7,
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res_pitch, psEncCtrl->pitchL, Wght_Q15, psEnc->sCmn.subfr_length,
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psEnc->sCmn.nb_subfr, psEnc->sCmn.ltp_mem_length, LTP_corrs_rshift, psEnc->sCmn.arch );
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/* Quantize LTP gain parameters */
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silk_quant_LTP_gains( psEncCtrl->LTPCoef_Q14, 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_FIX( psEnc, psEncCtrl, condCoding );
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/* Create LTP residual */
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silk_LTP_analysis_filter_FIX( LPC_in_pre, x - psEnc->sCmn.predictLPCOrder, psEncCtrl->LTPCoef_Q14,
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psEncCtrl->pitchL, invGains_Q16, 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_vector16( x_pre_ptr, x_ptr, invGains_Q16[ 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_Q14, 0, psEnc->sCmn.nb_subfr * LTP_ORDER * sizeof( opus_int16 ) );
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psEncCtrl->LTPredCodGain_Q7 = 0;
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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_Q30 = SILK_FIX_CONST( 1.0f / MAX_PREDICTION_POWER_GAIN_AFTER_RESET, 30 );
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} else {
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minInvGain_Q30 = silk_log2lin( silk_SMLAWB( 16 << 7, (opus_int32)psEncCtrl->LTPredCodGain_Q7, SILK_FIX_CONST( 1.0 / 3, 16 ) ) ); /* Q16 */
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minInvGain_Q30 = silk_DIV32_varQ( minInvGain_Q30,
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silk_SMULWW( SILK_FIX_CONST( MAX_PREDICTION_POWER_GAIN, 0 ),
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silk_SMLAWB( SILK_FIX_CONST( 0.25, 18 ), SILK_FIX_CONST( 0.75, 18 ), psEncCtrl->coding_quality_Q14 ) ), 14 );
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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_FIX( &psEnc->sCmn, NLSF_Q15, LPC_in_pre, minInvGain_Q30 );
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/* Quantize LSFs */
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silk_process_NLSFs( &psEnc->sCmn, psEncCtrl->PredCoef_Q12, 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_FIX( psEncCtrl->ResNrg, psEncCtrl->ResNrgQ, LPC_in_pre, psEncCtrl->PredCoef_Q12, local_gains,
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psEnc->sCmn.subfr_length, psEnc->sCmn.nb_subfr, psEnc->sCmn.predictLPCOrder, psEnc->sCmn.arch );
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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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RESTORE_STACK;
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}
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