media/libopus/celt/mips/celt_mipsr1.h

   1 /* Copyright (c) 2007-2008 CSIRO
   2    Copyright (c) 2007-2010 Xiph.Org Foundation
   3    Copyright (c) 2008 Gregory Maxwell
   4    Written by Jean-Marc Valin and Gregory Maxwell */
   5 /*
   6    Redistribution and use in source and binary forms, with or without
   7    modification, are permitted provided that the following conditions
   8    are met:
   9
  10    - Redistributions of source code must retain the above copyright
  11    notice, this list of conditions and the following disclaimer.
  12
  13    - Redistributions in binary form must reproduce the above copyright
  14    notice, this list of conditions and the following disclaimer in the
  15    documentation and/or other materials provided with the distribution.
  16
  17    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  18    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  19    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  20    A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
  21    OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  22    EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  23    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  24    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  25    LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  26    NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  27    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28 */
  29
  30 #ifndef CELT_MIPSR1_H__
  31 #define CELT_MIPSR1_H__
  32
  33 #ifdef HAVE_CONFIG_H
  34 #include "config.h"
  35 #endif
  36
  37 #define CELT_C
  38
  39 #include "os_support.h"
  40 #include "mdct.h"
  41 #include <math.h>
  42 #include "celt.h"
  43 #include "pitch.h"
  44 #include "bands.h"
  45 #include "modes.h"
  46 #include "entcode.h"
  47 #include "quant_bands.h"
  48 #include "rate.h"
  49 #include "stack_alloc.h"
  50 #include "mathops.h"
  51 #include "float_cast.h"
  52 #include <stdarg.h>
  53 #include "celt_lpc.h"
  54 #include "vq.h"
  55
  56 #define OVERRIDE_COMB_FILTER_CONST
  57 #define OVERRIDE_comb_filter
  58 void comb_filter(opus_val32 *y, opus_val32 *x, int T0, int T1, int N,
  59       opus_val16 g0, opus_val16 g1, int tapset0, int tapset1,
  60       const opus_val16 *window, int overlap, int arch)
  61 {
  62    int i;
  63    opus_val32 x0, x1, x2, x3, x4;
  64
  65    (void)arch;
  66
  67    /* printf ("%d %d %f %f\n", T0, T1, g0, g1); */
  68    opus_val16 g00, g01, g02, g10, g11, g12;
  69    static const opus_val16 gains[3][3] = {
  70          {QCONST16(0.3066406250f, 15), QCONST16(0.2170410156f, 15), QCONST16(0.1296386719f, 15)},
  71          {QCONST16(0.4638671875f, 15), QCONST16(0.2680664062f, 15), QCONST16(0.f, 15)},
  72          {QCONST16(0.7998046875f, 15), QCONST16(0.1000976562f, 15), QCONST16(0.f, 15)}};
  73
  74    if (g0==0 && g1==0)
  75    {
  76       /* OPT: Happens to work without the OPUS_MOVE(), but only because the current encoder already copies x to y */
  77       if (x!=y)
  78          OPUS_MOVE(y, x, N);
  79       return;
  80    }
  81
  82    g00 = MULT16_16_P15(g0, gains[tapset0][0]);
  83    g01 = MULT16_16_P15(g0, gains[tapset0][1]);
  84    g02 = MULT16_16_P15(g0, gains[tapset0][2]);
  85    g10 = MULT16_16_P15(g1, gains[tapset1][0]);
  86    g11 = MULT16_16_P15(g1, gains[tapset1][1]);
  87    g12 = MULT16_16_P15(g1, gains[tapset1][2]);
  88    x1 = x[-T1+1];
  89    x2 = x[-T1  ];
  90    x3 = x[-T1-1];
  91    x4 = x[-T1-2];
  92    /* If the filter didn't change, we don't need the overlap */
  93    if (g0==g1 && T0==T1 && tapset0==tapset1)
  94       overlap=0;
  95
  96    for (i=0;i<overlap;i++)
  97    {
  98       opus_val16 f;
  99       opus_val32 res;
 100       f = MULT16_16_Q15(window[i],window[i]);
 101       x0= x[i-T1+2];
 102
 103       asm volatile("MULT $ac1, %0, %1" : : "r" ((int)MULT16_16_Q15((Q15ONE-f),g00)), "r" ((int)x[i-T0]));
 104
 105       asm volatile("MADD $ac1, %0, %1" : : "r" ((int)MULT16_16_Q15((Q15ONE-f),g01)), "r" ((int)ADD32(x[i-T0-1],x[i-T0+1])));
 106       asm volatile("MADD $ac1, %0, %1" : : "r" ((int)MULT16_16_Q15((Q15ONE-f),g02)), "r" ((int)ADD32(x[i-T0-2],x[i-T0+2])));
 107       asm volatile("MADD $ac1, %0, %1" : : "r" ((int)MULT16_16_Q15(f,g10)), "r" ((int)x2));
 108       asm volatile("MADD $ac1, %0, %1" : : "r" ((int)MULT16_16_Q15(f,g11)), "r" ((int)ADD32(x3,x1)));
 109       asm volatile("MADD $ac1, %0, %1" : : "r" ((int)MULT16_16_Q15(f,g12)), "r" ((int)ADD32(x4,x0)));
 110
 111       asm volatile("EXTR.W %0,$ac1, %1" : "=r" (res): "i" (15));
 112
 113       y[i] = x[i] + res;
 114
 115       x4=x3;
 116       x3=x2;
 117       x2=x1;
 118       x1=x0;
 119    }
 120
 121    x4 = x[i-T1-2];
 122    x3 = x[i-T1-1];
 123    x2 = x[i-T1];
 124    x1 = x[i-T1+1];
 125
 126    if (g1==0)
 127    {
 128       /* OPT: Happens to work without the OPUS_MOVE(), but only because the current encoder already copies x to y */
 129       if (x!=y)
 130          OPUS_MOVE(y+overlap, x+overlap, N-overlap);
 131       return;
 132    }
 133
 134    for (i=overlap;i<N;i++)
 135    {
 136       opus_val32 res;
 137       x0=x[i-T1+2];
 138
 139       asm volatile("MULT $ac1, %0, %1" : : "r" ((int)g10), "r" ((int)x2));
 140
 141       asm volatile("MADD $ac1, %0, %1" : : "r" ((int)g11), "r" ((int)ADD32(x3,x1)));
 142       asm volatile("MADD $ac1, %0, %1" : : "r" ((int)g12), "r" ((int)ADD32(x4,x0)));
 143       asm volatile("EXTR.W %0,$ac1, %1" : "=r" (res): "i" (15));
 144       y[i] = x[i] + res;
 145       x4=x3;
 146       x3=x2;
 147       x2=x1;
 148       x1=x0;
 149    }
 150 }
 151
 152 #endif /* CELT_MIPSR1_H__ */