diff options
Diffstat (limited to 'src/opus-1.0.2/silk/float/find_pred_coefs_FLP.c')
| -rw-r--r-- | src/opus-1.0.2/silk/float/find_pred_coefs_FLP.c | 116 |
1 files changed, 0 insertions, 116 deletions
diff --git a/src/opus-1.0.2/silk/float/find_pred_coefs_FLP.c b/src/opus-1.0.2/silk/float/find_pred_coefs_FLP.c deleted file mode 100644 index 2156893a..00000000 --- a/src/opus-1.0.2/silk/float/find_pred_coefs_FLP.c +++ /dev/null @@ -1,116 +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" - -/* Find LPC and LTP coefficients */ -void silk_find_pred_coefs_FLP( - silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */ - silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */ - const silk_float res_pitch[], /* I Residual from pitch analysis */ - const silk_float x[], /* I Speech signal */ - opus_int condCoding /* I The type of conditional coding to use */ -) -{ - opus_int i; - silk_float WLTP[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ]; - silk_float invGains[ MAX_NB_SUBFR ], Wght[ MAX_NB_SUBFR ]; - opus_int16 NLSF_Q15[ MAX_LPC_ORDER ]; - const silk_float *x_ptr; - silk_float *x_pre_ptr, LPC_in_pre[ MAX_NB_SUBFR * MAX_LPC_ORDER + MAX_FRAME_LENGTH ]; - silk_float minInvGain; - - /* Weighting for weighted least squares */ - for( i = 0; i < psEnc->sCmn.nb_subfr; i++ ) { - silk_assert( psEncCtrl->Gains[ i ] > 0.0f ); - invGains[ i ] = 1.0f / psEncCtrl->Gains[ i ]; - Wght[ i ] = invGains[ i ] * invGains[ i ]; - } - - if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) { - /**********/ - /* VOICED */ - /**********/ - silk_assert( psEnc->sCmn.ltp_mem_length - psEnc->sCmn.predictLPCOrder >= psEncCtrl->pitchL[ 0 ] + LTP_ORDER / 2 ); - - /* LTP analysis */ - silk_find_LTP_FLP( psEncCtrl->LTPCoef, WLTP, &psEncCtrl->LTPredCodGain, res_pitch, - psEncCtrl->pitchL, Wght, psEnc->sCmn.subfr_length, psEnc->sCmn.nb_subfr, psEnc->sCmn.ltp_mem_length ); - - /* Quantize LTP gain parameters */ - silk_quant_LTP_gains_FLP( psEncCtrl->LTPCoef, psEnc->sCmn.indices.LTPIndex, &psEnc->sCmn.indices.PERIndex, - WLTP, psEnc->sCmn.mu_LTP_Q9, psEnc->sCmn.LTPQuantLowComplexity, psEnc->sCmn.nb_subfr ); - - /* Control LTP scaling */ - silk_LTP_scale_ctrl_FLP( psEnc, psEncCtrl, condCoding ); - - /* Create LTP residual */ - silk_LTP_analysis_filter_FLP( LPC_in_pre, x - psEnc->sCmn.predictLPCOrder, psEncCtrl->LTPCoef, - psEncCtrl->pitchL, invGains, psEnc->sCmn.subfr_length, psEnc->sCmn.nb_subfr, psEnc->sCmn.predictLPCOrder ); - } else { - /************/ - /* UNVOICED */ - /************/ - /* Create signal with prepended subframes, scaled by inverse gains */ - x_ptr = x - psEnc->sCmn.predictLPCOrder; - x_pre_ptr = LPC_in_pre; - for( i = 0; i < psEnc->sCmn.nb_subfr; i++ ) { - silk_scale_copy_vector_FLP( x_pre_ptr, x_ptr, invGains[ i ], - psEnc->sCmn.subfr_length + psEnc->sCmn.predictLPCOrder ); - x_pre_ptr += psEnc->sCmn.subfr_length + psEnc->sCmn.predictLPCOrder; - x_ptr += psEnc->sCmn.subfr_length; - } - silk_memset( psEncCtrl->LTPCoef, 0, psEnc->sCmn.nb_subfr * LTP_ORDER * sizeof( silk_float ) ); - psEncCtrl->LTPredCodGain = 0.0f; - } - - /* Limit on total predictive coding gain */ - if( psEnc->sCmn.first_frame_after_reset ) { - minInvGain = 1.0f / MAX_PREDICTION_POWER_GAIN_AFTER_RESET; - } else { - minInvGain = (silk_float)pow( 2, psEncCtrl->LTPredCodGain / 3 ) / MAX_PREDICTION_POWER_GAIN; - minInvGain /= 0.25f + 0.75f * psEncCtrl->coding_quality; - } - - /* LPC_in_pre contains the LTP-filtered input for voiced, and the unfiltered input for unvoiced */ - silk_find_LPC_FLP( &psEnc->sCmn, NLSF_Q15, LPC_in_pre, minInvGain ); - - /* Quantize LSFs */ - silk_process_NLSFs_FLP( &psEnc->sCmn, psEncCtrl->PredCoef, NLSF_Q15, psEnc->sCmn.prev_NLSFq_Q15 ); - - /* Calculate residual energy using quantized LPC coefficients */ - silk_residual_energy_FLP( psEncCtrl->ResNrg, LPC_in_pre, psEncCtrl->PredCoef, psEncCtrl->Gains, - psEnc->sCmn.subfr_length, psEnc->sCmn.nb_subfr, psEnc->sCmn.predictLPCOrder ); - - /* Copy to prediction struct for use in next frame for interpolation */ - silk_memcpy( psEnc->sCmn.prev_NLSFq_Q15, NLSF_Q15, sizeof( psEnc->sCmn.prev_NLSFq_Q15 ) ); -} - |