995dcb610c
Took the opportunity to undo the Godot changed made to the
opus source. The opus module should eventually be built in its
own environment to avoid polluting others with too many include
dirs and defines.
TODO: Fix the platform/ stuff for opus.
(cherry picked from commit d9a291f641)
speex module was only added while cherry-picking, as speex is removed
in the master branch but we don't want to break compatibility in 2.1.x.
Unbundling wasn't done as the module uses the internal speex_free,
so it would require some more work.
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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