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46ae64cd60
This reverts commit e00426c512.
The way we handle platform-specific intrinsics is not good, so the
current state will not compile on armv8. This commit also requires
SSE4.1 support, which is likely not a good idea for portable binaries.
We'll have to redo this with more caution after 3.2 is released, or
we might simply drop opus as we're only using it as dependency for
theora right now.
Fixes #33606.
98 lines
5.3 KiB
C
98 lines
5.3 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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/* Calculates residual energies of input subframes where all subframes have LPC_order */
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/* of preceding samples */
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void silk_residual_energy_FIX(
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opus_int32 nrgs[ MAX_NB_SUBFR ], /* O Residual energy per subframe */
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opus_int nrgsQ[ MAX_NB_SUBFR ], /* O Q value per subframe */
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const opus_int16 x[], /* I Input signal */
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opus_int16 a_Q12[ 2 ][ MAX_LPC_ORDER ], /* I AR coefs for each frame half */
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const opus_int32 gains[ MAX_NB_SUBFR ], /* I Quantization gains */
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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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const opus_int LPC_order, /* I LPC order */
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int arch /* I Run-time architecture */
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)
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{
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opus_int offset, i, j, rshift, lz1, lz2;
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opus_int16 *LPC_res_ptr;
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VARDECL( opus_int16, LPC_res );
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const opus_int16 *x_ptr;
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opus_int32 tmp32;
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SAVE_STACK;
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x_ptr = x;
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offset = LPC_order + subfr_length;
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/* Filter input to create the LPC residual for each frame half, and measure subframe energies */
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ALLOC( LPC_res, ( MAX_NB_SUBFR >> 1 ) * offset, opus_int16 );
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silk_assert( ( nb_subfr >> 1 ) * ( MAX_NB_SUBFR >> 1 ) == nb_subfr );
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for( i = 0; i < nb_subfr >> 1; i++ ) {
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/* Calculate half frame LPC residual signal including preceding samples */
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silk_LPC_analysis_filter( LPC_res, x_ptr, a_Q12[ i ], ( MAX_NB_SUBFR >> 1 ) * offset, LPC_order, arch );
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/* Point to first subframe of the just calculated LPC residual signal */
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LPC_res_ptr = LPC_res + LPC_order;
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for( j = 0; j < ( MAX_NB_SUBFR >> 1 ); j++ ) {
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/* Measure subframe energy */
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silk_sum_sqr_shift( &nrgs[ i * ( MAX_NB_SUBFR >> 1 ) + j ], &rshift, LPC_res_ptr, subfr_length );
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/* Set Q values for the measured energy */
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nrgsQ[ i * ( MAX_NB_SUBFR >> 1 ) + j ] = -rshift;
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/* Move to next subframe */
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LPC_res_ptr += offset;
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}
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/* Move to next frame half */
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x_ptr += ( MAX_NB_SUBFR >> 1 ) * offset;
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}
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/* Apply the squared subframe gains */
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for( i = 0; i < nb_subfr; i++ ) {
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/* Fully upscale gains and energies */
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lz1 = silk_CLZ32( nrgs[ i ] ) - 1;
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lz2 = silk_CLZ32( gains[ i ] ) - 1;
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tmp32 = silk_LSHIFT32( gains[ i ], lz2 );
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/* Find squared gains */
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tmp32 = silk_SMMUL( tmp32, tmp32 ); /* Q( 2 * lz2 - 32 )*/
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/* Scale energies */
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nrgs[ i ] = silk_SMMUL( tmp32, silk_LSHIFT32( nrgs[ i ], lz1 ) ); /* Q( nrgsQ[ i ] + lz1 + 2 * lz2 - 32 - 32 )*/
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nrgsQ[ i ] += lz1 + 2 * lz2 - 32 - 32;
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}
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RESTORE_STACK;
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}
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