You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
77 lines
3.9 KiB
77 lines
3.9 KiB
4 months ago
|
/***********************************************************************
|
||
|
|
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.h"
|
||
|
|
|
||
|
|
/* Compute quantization errors for an LPC_order element input vector for a VQ codebook */
|
||
|
|
void silk_NLSF_VQ(
|
||
|
|
opus_int32 err_Q24[], /* O Quantization errors [K] */
|
||
|
|
const opus_int16 in_Q15[], /* I Input vectors to be quantized [LPC_order] */
|
||
|
|
const opus_uint8 pCB_Q8[], /* I Codebook vectors [K*LPC_order] */
|
||
|
|
const opus_int16 pWght_Q9[], /* I Codebook weights [K*LPC_order] */
|
||
|
|
const opus_int K, /* I Number of codebook vectors */
|
||
|
|
const opus_int LPC_order /* I Number of LPCs */
|
||
|
|
)
|
||
|
|
{
|
||
|
|
opus_int i, m;
|
||
|
|
opus_int32 diff_Q15, diffw_Q24, sum_error_Q24, pred_Q24;
|
||
|
|
const opus_int16 *w_Q9_ptr;
|
||
|
|
const opus_uint8 *cb_Q8_ptr;
|
||
|
|
|
||
|
|
celt_assert( ( LPC_order & 1 ) == 0 );
|
||
|
|
|
||
|
|
/* Loop over codebook */
|
||
|
|
cb_Q8_ptr = pCB_Q8;
|
||
|
|
w_Q9_ptr = pWght_Q9;
|
||
|
|
for( i = 0; i < K; i++ ) {
|
||
|
|
sum_error_Q24 = 0;
|
||
|
|
pred_Q24 = 0;
|
||
|
|
for( m = LPC_order-2; m >= 0; m -= 2 ) {
|
||
|
|
/* Compute weighted absolute predictive quantization error for index m + 1 */
|
||
|
|
diff_Q15 = silk_SUB_LSHIFT32( in_Q15[ m + 1 ], (opus_int32)cb_Q8_ptr[ m + 1 ], 7 ); /* range: [ -32767 : 32767 ]*/
|
||
|
|
diffw_Q24 = silk_SMULBB( diff_Q15, w_Q9_ptr[ m + 1 ] );
|
||
|
|
sum_error_Q24 = silk_ADD32( sum_error_Q24, silk_abs( silk_SUB_RSHIFT32( diffw_Q24, pred_Q24, 1 ) ) );
|
||
|
|
pred_Q24 = diffw_Q24;
|
||
|
|
|
||
|
|
/* Compute weighted absolute predictive quantization error for index m */
|
||
|
|
diff_Q15 = silk_SUB_LSHIFT32( in_Q15[ m ], (opus_int32)cb_Q8_ptr[ m ], 7 ); /* range: [ -32767 : 32767 ]*/
|
||
|
|
diffw_Q24 = silk_SMULBB( diff_Q15, w_Q9_ptr[ m ] );
|
||
|
|
sum_error_Q24 = silk_ADD32( sum_error_Q24, silk_abs( silk_SUB_RSHIFT32( diffw_Q24, pred_Q24, 1 ) ) );
|
||
|
|
pred_Q24 = diffw_Q24;
|
||
|
|
|
||
|
|
silk_assert( sum_error_Q24 >= 0 );
|
||
|
|
}
|
||
|
|
err_Q24[ i ] = sum_error_Q24;
|
||
|
|
cb_Q8_ptr += LPC_order;
|
||
|
|
w_Q9_ptr += LPC_order;
|
||
|
|
}
|
||
|
|
}
|