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.
147 lines
4 KiB
C
147 lines
4 KiB
C
/* Copyright (C) 2002 Jean-Marc Valin
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File: vq.c
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Vector quantization
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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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- Neither the name of the Xiph.org Foundation nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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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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#include "config.h"
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#include "vq.h"
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#include "stack_alloc.h"
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#include "arch.h"
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#ifdef _USE_SSE
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#include <xmmintrin.h>
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#include "vq_sse.h"
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#elif defined(SHORTCUTS) && (defined(ARM4_ASM) || defined(ARM5E_ASM))
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#include "vq_arm4.h"
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#elif defined(BFIN_ASM)
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#include "vq_bfin.h"
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#endif
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int scal_quant(spx_word16_t in, const spx_word16_t *boundary, int entries)
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{
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int i=0;
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while (i<entries-1 && in>boundary[0])
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{
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boundary++;
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i++;
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}
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return i;
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}
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int scal_quant32(spx_word32_t in, const spx_word32_t *boundary, int entries)
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{
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int i=0;
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while (i<entries-1 && in>boundary[0])
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{
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boundary++;
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i++;
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}
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return i;
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}
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#ifndef OVERRIDE_VQ_NBEST
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/*Finds the indices of the n-best entries in a codebook*/
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void vq_nbest(spx_word16_t *in, const spx_word16_t *codebook, int len, int entries, spx_word32_t *E, int N, int *nbest, spx_word32_t *best_dist, char *stack)
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{
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int i,j,k,used;
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used = 0;
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for (i=0;i<entries;i++)
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{
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spx_word32_t dist=0;
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for (j=0;j<len;j++)
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dist = MAC16_16(dist,in[j],*codebook++);
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#ifdef FIXED_POINT
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dist=SUB32(SHR32(E[i],1),dist);
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#else
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dist=.5f*E[i]-dist;
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#endif
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if (i<N || dist<best_dist[N-1])
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{
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for (k=N-1; (k >= 1) && (k > used || dist < best_dist[k-1]); k--)
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{
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best_dist[k]=best_dist[k-1];
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nbest[k] = nbest[k-1];
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}
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best_dist[k]=dist;
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nbest[k]=i;
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used++;
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}
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}
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}
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#endif
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#ifndef OVERRIDE_VQ_NBEST_SIGN
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/*Finds the indices of the n-best entries in a codebook with sign*/
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void vq_nbest_sign(spx_word16_t *in, const spx_word16_t *codebook, int len, int entries, spx_word32_t *E, int N, int *nbest, spx_word32_t *best_dist, char *stack)
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{
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int i,j,k, sign, used;
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used=0;
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for (i=0;i<entries;i++)
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{
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spx_word32_t dist=0;
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for (j=0;j<len;j++)
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dist = MAC16_16(dist,in[j],*codebook++);
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if (dist>0)
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{
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sign=0;
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dist=-dist;
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} else
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{
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sign=1;
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}
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#ifdef FIXED_POINT
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dist = ADD32(dist,SHR32(E[i],1));
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#else
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dist = ADD32(dist,.5f*E[i]);
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#endif
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if (i<N || dist<best_dist[N-1])
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{
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for (k=N-1; (k >= 1) && (k > used || dist < best_dist[k-1]); k--)
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{
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best_dist[k]=best_dist[k-1];
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nbest[k] = nbest[k-1];
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}
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best_dist[k]=dist;
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nbest[k]=i;
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used++;
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if (sign)
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nbest[k]+=entries;
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}
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}
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}
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#endif
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