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.
145 lines
4 KiB
C
145 lines
4 KiB
C
/* Copyright (c) 2008-2011 Octasic Inc.
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Written by Jean-Marc Valin */
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/*
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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
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notice, 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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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE 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 "opus_types.h"
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#include "opus_defines.h"
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#include <math.h>
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#include "mlp.h"
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#include "arch.h"
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#include "tansig_table.h"
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#define MAX_NEURONS 100
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#if 0
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static OPUS_INLINE opus_val16 tansig_approx(opus_val32 _x) /* Q19 */
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{
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int i;
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opus_val16 xx; /* Q11 */
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/*double x, y;*/
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opus_val16 dy, yy; /* Q14 */
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/*x = 1.9073e-06*_x;*/
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if (_x>=QCONST32(8,19))
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return QCONST32(1.,14);
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if (_x<=-QCONST32(8,19))
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return -QCONST32(1.,14);
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xx = EXTRACT16(SHR32(_x, 8));
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/*i = lrint(25*x);*/
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i = SHR32(ADD32(1024,MULT16_16(25, xx)),11);
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/*x -= .04*i;*/
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xx -= EXTRACT16(SHR32(MULT16_16(20972,i),8));
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/*x = xx*(1./2048);*/
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/*y = tansig_table[250+i];*/
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yy = tansig_table[250+i];
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/*y = yy*(1./16384);*/
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dy = 16384-MULT16_16_Q14(yy,yy);
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yy = yy + MULT16_16_Q14(MULT16_16_Q11(xx,dy),(16384 - MULT16_16_Q11(yy,xx)));
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return yy;
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}
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#else
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/*extern const float tansig_table[501];*/
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static OPUS_INLINE float tansig_approx(float x)
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{
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int i;
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float y, dy;
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float sign=1;
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/* Tests are reversed to catch NaNs */
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if (!(x<8))
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return 1;
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if (!(x>-8))
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return -1;
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#ifndef FIXED_POINT
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/* Another check in case of -ffast-math */
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if (celt_isnan(x))
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return 0;
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#endif
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if (x<0)
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{
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x=-x;
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sign=-1;
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}
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i = (int)floor(.5f+25*x);
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x -= .04f*i;
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y = tansig_table[i];
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dy = 1-y*y;
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y = y + x*dy*(1 - y*x);
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return sign*y;
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}
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#endif
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#if 0
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void mlp_process(const MLP *m, const opus_val16 *in, opus_val16 *out)
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{
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int j;
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opus_val16 hidden[MAX_NEURONS];
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const opus_val16 *W = m->weights;
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/* Copy to tmp_in */
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for (j=0;j<m->topo[1];j++)
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{
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int k;
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opus_val32 sum = SHL32(EXTEND32(*W++),8);
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for (k=0;k<m->topo[0];k++)
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sum = MAC16_16(sum, in[k],*W++);
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hidden[j] = tansig_approx(sum);
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}
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for (j=0;j<m->topo[2];j++)
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{
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int k;
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opus_val32 sum = SHL32(EXTEND32(*W++),14);
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for (k=0;k<m->topo[1];k++)
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sum = MAC16_16(sum, hidden[k], *W++);
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out[j] = tansig_approx(EXTRACT16(PSHR32(sum,17)));
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}
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}
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#else
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void mlp_process(const MLP *m, const float *in, float *out)
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{
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int j;
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float hidden[MAX_NEURONS];
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const float *W = m->weights;
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/* Copy to tmp_in */
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for (j=0;j<m->topo[1];j++)
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{
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int k;
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float sum = *W++;
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for (k=0;k<m->topo[0];k++)
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sum = sum + in[k]**W++;
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hidden[j] = tansig_approx(sum);
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}
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for (j=0;j<m->topo[2];j++)
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{
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int k;
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float sum = *W++;
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for (k=0;k<m->topo[1];k++)
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sum = sum + hidden[k]**W++;
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out[j] = tansig_approx(sum);
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}
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}
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#endif
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