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path: root/src/opus-1.0.2/silk/float/find_pitch_lags_FLP.c
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Diffstat (limited to 'src/opus-1.0.2/silk/float/find_pitch_lags_FLP.c')
-rw-r--r--src/opus-1.0.2/silk/float/find_pitch_lags_FLP.c131
1 files changed, 0 insertions, 131 deletions
diff --git a/src/opus-1.0.2/silk/float/find_pitch_lags_FLP.c b/src/opus-1.0.2/silk/float/find_pitch_lags_FLP.c
deleted file mode 100644
index 00862a6d..00000000
--- a/src/opus-1.0.2/silk/float/find_pitch_lags_FLP.c
+++ /dev/null
@@ -1,131 +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 <stdlib.h>
-#include "main_FLP.h"
-#include "tuning_parameters.h"
-
-void silk_find_pitch_lags_FLP(
- silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
- silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
- silk_float res[], /* O Residual */
- const silk_float x[] /* I Speech signal */
-)
-{
- opus_int buf_len;
- silk_float thrhld, res_nrg;
- const silk_float *x_buf_ptr, *x_buf;
- silk_float auto_corr[ MAX_FIND_PITCH_LPC_ORDER + 1 ];
- silk_float A[ MAX_FIND_PITCH_LPC_ORDER ];
- silk_float refl_coef[ MAX_FIND_PITCH_LPC_ORDER ];
- silk_float Wsig[ FIND_PITCH_LPC_WIN_MAX ];
- silk_float *Wsig_ptr;
-
- /******************************************/
- /* Set up buffer lengths etc based on Fs */
- /******************************************/
- buf_len = psEnc->sCmn.la_pitch + psEnc->sCmn.frame_length + psEnc->sCmn.ltp_mem_length;
-
- /* Safety check */
- silk_assert( buf_len >= psEnc->sCmn.pitch_LPC_win_length );
-
- x_buf = x - psEnc->sCmn.ltp_mem_length;
-
- /******************************************/
- /* Estimate LPC AR coeficients */
- /******************************************/
-
- /* Calculate windowed signal */
-
- /* First LA_LTP samples */
- x_buf_ptr = x_buf + buf_len - psEnc->sCmn.pitch_LPC_win_length;
- Wsig_ptr = Wsig;
- silk_apply_sine_window_FLP( Wsig_ptr, x_buf_ptr, 1, psEnc->sCmn.la_pitch );
-
- /* Middle non-windowed samples */
- Wsig_ptr += psEnc->sCmn.la_pitch;
- x_buf_ptr += psEnc->sCmn.la_pitch;
- silk_memcpy( Wsig_ptr, x_buf_ptr, ( psEnc->sCmn.pitch_LPC_win_length - ( psEnc->sCmn.la_pitch << 1 ) ) * sizeof( silk_float ) );
-
- /* Last LA_LTP samples */
- Wsig_ptr += psEnc->sCmn.pitch_LPC_win_length - ( psEnc->sCmn.la_pitch << 1 );
- x_buf_ptr += psEnc->sCmn.pitch_LPC_win_length - ( psEnc->sCmn.la_pitch << 1 );
- silk_apply_sine_window_FLP( Wsig_ptr, x_buf_ptr, 2, psEnc->sCmn.la_pitch );
-
- /* Calculate autocorrelation sequence */
- silk_autocorrelation_FLP( auto_corr, Wsig, psEnc->sCmn.pitch_LPC_win_length, psEnc->sCmn.pitchEstimationLPCOrder + 1 );
-
- /* Add white noise, as a fraction of the energy */
- auto_corr[ 0 ] += auto_corr[ 0 ] * FIND_PITCH_WHITE_NOISE_FRACTION + 1;
-
- /* Calculate the reflection coefficients using Schur */
- res_nrg = silk_schur_FLP( refl_coef, auto_corr, psEnc->sCmn.pitchEstimationLPCOrder );
-
- /* Prediction gain */
- psEncCtrl->predGain = auto_corr[ 0 ] / silk_max_float( res_nrg, 1.0f );
-
- /* Convert reflection coefficients to prediction coefficients */
- silk_k2a_FLP( A, refl_coef, psEnc->sCmn.pitchEstimationLPCOrder );
-
- /* Bandwidth expansion */
- silk_bwexpander_FLP( A, psEnc->sCmn.pitchEstimationLPCOrder, FIND_PITCH_BANDWIDTH_EXPANSION );
-
- /*****************************************/
- /* LPC analysis filtering */
- /*****************************************/
- silk_LPC_analysis_filter_FLP( res, A, x_buf, buf_len, psEnc->sCmn.pitchEstimationLPCOrder );
-
- if( psEnc->sCmn.indices.signalType != TYPE_NO_VOICE_ACTIVITY && psEnc->sCmn.first_frame_after_reset == 0 ) {
- /* Threshold for pitch estimator */
- thrhld = 0.6f;
- thrhld -= 0.004f * psEnc->sCmn.pitchEstimationLPCOrder;
- thrhld -= 0.1f * psEnc->sCmn.speech_activity_Q8 * ( 1.0f / 256.0f );
- thrhld -= 0.15f * (psEnc->sCmn.prevSignalType >> 1);
- thrhld -= 0.1f * psEnc->sCmn.input_tilt_Q15 * ( 1.0f / 32768.0f );
-
- /*****************************************/
- /* Call Pitch estimator */
- /*****************************************/
- if( silk_pitch_analysis_core_FLP( res, psEncCtrl->pitchL, &psEnc->sCmn.indices.lagIndex,
- &psEnc->sCmn.indices.contourIndex, &psEnc->LTPCorr, psEnc->sCmn.prevLag, psEnc->sCmn.pitchEstimationThreshold_Q16 / 65536.0f,
- thrhld, psEnc->sCmn.fs_kHz, psEnc->sCmn.pitchEstimationComplexity, psEnc->sCmn.nb_subfr ) == 0 )
- {
- psEnc->sCmn.indices.signalType = TYPE_VOICED;
- } else {
- psEnc->sCmn.indices.signalType = TYPE_UNVOICED;
- }
- } else {
- silk_memset( psEncCtrl->pitchL, 0, sizeof( psEncCtrl->pitchL ) );
- psEnc->sCmn.indices.lagIndex = 0;
- psEnc->sCmn.indices.contourIndex = 0;
- psEnc->LTPCorr = 0;
- }
-}
generated by cgit (git 2.34.1) at 2024-11-15 18:59:07 +0000