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65 lines
3.3 KiB
65 lines
3.3 KiB
/*********************************************************************** |
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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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#include "tuning_parameters.h" |
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void silk_find_LTP_FLP( |
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silk_float XX[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* O Weight for LTP quantization */ |
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silk_float xX[ MAX_NB_SUBFR * LTP_ORDER ], /* O Weight for LTP quantization */ |
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const silk_float r_ptr[], /* I LPC residual */ |
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const opus_int lag[ MAX_NB_SUBFR ], /* I LTP lags */ |
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const opus_int subfr_length, /* I Subframe length */ |
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const opus_int nb_subfr, /* I number of subframes */ |
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int arch |
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) |
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{ |
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opus_int k; |
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silk_float *xX_ptr, *XX_ptr; |
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const silk_float *lag_ptr; |
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silk_float xx, temp; |
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xX_ptr = xX; |
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XX_ptr = XX; |
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for( k = 0; k < nb_subfr; k++ ) { |
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lag_ptr = r_ptr - ( lag[ k ] + LTP_ORDER / 2 ); |
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silk_corrMatrix_FLP( lag_ptr, subfr_length, LTP_ORDER, XX_ptr, arch ); |
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silk_corrVector_FLP( lag_ptr, r_ptr, subfr_length, LTP_ORDER, xX_ptr, arch ); |
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xx = ( silk_float )silk_energy_FLP( r_ptr, subfr_length + LTP_ORDER ); |
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temp = 1.0f / silk_max( xx, LTP_CORR_INV_MAX * 0.5f * ( XX_ptr[ 0 ] + XX_ptr[ 24 ] ) + 1.0f ); |
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silk_scale_vector_FLP( XX_ptr, temp, LTP_ORDER * LTP_ORDER ); |
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silk_scale_vector_FLP( xX_ptr, temp, LTP_ORDER ); |
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r_ptr += subfr_length; |
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XX_ptr += LTP_ORDER * LTP_ORDER; |
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xX_ptr += LTP_ORDER; |
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} |
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}
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