Chris@69: /* Copyright (c) 2007-2008 CSIRO
Chris@69:    Copyright (c) 2007-2010 Xiph.Org Foundation
Chris@69:    Copyright (c) 2008 Gregory Maxwell
Chris@69:    Written by Jean-Marc Valin and Gregory Maxwell */
Chris@69: /*
Chris@69:    Redistribution and use in source and binary forms, with or without
Chris@69:    modification, are permitted provided that the following conditions
Chris@69:    are met:
Chris@69: 
Chris@69:    - Redistributions of source code must retain the above copyright
Chris@69:    notice, this list of conditions and the following disclaimer.
Chris@69: 
Chris@69:    - Redistributions in binary form must reproduce the above copyright
Chris@69:    notice, this list of conditions and the following disclaimer in the
Chris@69:    documentation and/or other materials provided with the distribution.
Chris@69: 
Chris@69:    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
Chris@69:    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
Chris@69:    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
Chris@69:    A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
Chris@69:    OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
Chris@69:    EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
Chris@69:    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
Chris@69:    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
Chris@69:    LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
Chris@69:    NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
Chris@69:    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Chris@69: */
Chris@69: 
Chris@69: #ifndef __CELT_MIPSR1_H__
Chris@69: #define __CELT_MIPSR1_H__
Chris@69: 
Chris@69: #ifdef HAVE_CONFIG_H
Chris@69: #include "config.h"
Chris@69: #endif
Chris@69: 
Chris@69: #define CELT_C
Chris@69: 
Chris@69: #include "os_support.h"
Chris@69: #include "mdct.h"
Chris@69: #include <math.h>
Chris@69: #include "celt.h"
Chris@69: #include "pitch.h"
Chris@69: #include "bands.h"
Chris@69: #include "modes.h"
Chris@69: #include "entcode.h"
Chris@69: #include "quant_bands.h"
Chris@69: #include "rate.h"
Chris@69: #include "stack_alloc.h"
Chris@69: #include "mathops.h"
Chris@69: #include "float_cast.h"
Chris@69: #include <stdarg.h>
Chris@69: #include "celt_lpc.h"
Chris@69: #include "vq.h"
Chris@69: 
Chris@69: #define OVERRIDE_comb_filter
Chris@69: void comb_filter(opus_val32 *y, opus_val32 *x, int T0, int T1, int N,
Chris@69:       opus_val16 g0, opus_val16 g1, int tapset0, int tapset1,
Chris@69:       const opus_val16 *window, int overlap, int arch)
Chris@69: {
Chris@69:    int i;
Chris@69:    opus_val32 x0, x1, x2, x3, x4;
Chris@69: 
Chris@69:    (void)arch;
Chris@69: 
Chris@69:    /* printf ("%d %d %f %f\n", T0, T1, g0, g1); */
Chris@69:    opus_val16 g00, g01, g02, g10, g11, g12;
Chris@69:    static const opus_val16 gains[3][3] = {
Chris@69:          {QCONST16(0.3066406250f, 15), QCONST16(0.2170410156f, 15), QCONST16(0.1296386719f, 15)},
Chris@69:          {QCONST16(0.4638671875f, 15), QCONST16(0.2680664062f, 15), QCONST16(0.f, 15)},
Chris@69:          {QCONST16(0.7998046875f, 15), QCONST16(0.1000976562f, 15), QCONST16(0.f, 15)}};
Chris@69: 
Chris@69:    if (g0==0 && g1==0)
Chris@69:    {
Chris@69:       /* OPT: Happens to work without the OPUS_MOVE(), but only because the current encoder already copies x to y */
Chris@69:       if (x!=y)
Chris@69:          OPUS_MOVE(y, x, N);
Chris@69:       return;
Chris@69:    }
Chris@69: 
Chris@69:    g00 = MULT16_16_P15(g0, gains[tapset0][0]);
Chris@69:    g01 = MULT16_16_P15(g0, gains[tapset0][1]);
Chris@69:    g02 = MULT16_16_P15(g0, gains[tapset0][2]);
Chris@69:    g10 = MULT16_16_P15(g1, gains[tapset1][0]);
Chris@69:    g11 = MULT16_16_P15(g1, gains[tapset1][1]);
Chris@69:    g12 = MULT16_16_P15(g1, gains[tapset1][2]);
Chris@69:    x1 = x[-T1+1];
Chris@69:    x2 = x[-T1  ];
Chris@69:    x3 = x[-T1-1];
Chris@69:    x4 = x[-T1-2];
Chris@69:    /* If the filter didn't change, we don't need the overlap */
Chris@69:    if (g0==g1 && T0==T1 && tapset0==tapset1)
Chris@69:       overlap=0;
Chris@69: 
Chris@69:    for (i=0;i<overlap;i++)
Chris@69:    {
Chris@69:       opus_val16 f;
Chris@69:       opus_val32 res;
Chris@69:       f = MULT16_16_Q15(window[i],window[i]);
Chris@69:       x0= x[i-T1+2];
Chris@69: 
Chris@69:       asm volatile("MULT $ac1, %0, %1" : : "r" ((int)MULT16_16_Q15((Q15ONE-f),g00)), "r" ((int)x[i-T0]));
Chris@69: 
Chris@69:       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])));
Chris@69:       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])));
Chris@69:       asm volatile("MADD $ac1, %0, %1" : : "r" ((int)MULT16_16_Q15(f,g10)), "r" ((int)x2));
Chris@69:       asm volatile("MADD $ac1, %0, %1" : : "r" ((int)MULT16_16_Q15(f,g11)), "r" ((int)ADD32(x3,x1)));
Chris@69:       asm volatile("MADD $ac1, %0, %1" : : "r" ((int)MULT16_16_Q15(f,g12)), "r" ((int)ADD32(x4,x0)));
Chris@69: 
Chris@69:       asm volatile("EXTR.W %0,$ac1, %1" : "=r" (res): "i" (15));
Chris@69: 
Chris@69:       y[i] = x[i] + res;
Chris@69: 
Chris@69:       x4=x3;
Chris@69:       x3=x2;
Chris@69:       x2=x1;
Chris@69:       x1=x0;
Chris@69:    }
Chris@69: 
Chris@69:    x4 = x[i-T1-2];
Chris@69:    x3 = x[i-T1-1];
Chris@69:    x2 = x[i-T1];
Chris@69:    x1 = x[i-T1+1];
Chris@69: 
Chris@69:    if (g1==0)
Chris@69:    {
Chris@69:       /* OPT: Happens to work without the OPUS_MOVE(), but only because the current encoder already copies x to y */
Chris@69:       if (x!=y)
Chris@69:          OPUS_MOVE(y+overlap, x+overlap, N-overlap);
Chris@69:       return;
Chris@69:    }
Chris@69: 
Chris@69:    for (i=overlap;i<N;i++)
Chris@69:    {
Chris@69:       opus_val32 res;
Chris@69:       x0=x[i-T1+2];
Chris@69: 
Chris@69:       asm volatile("MULT $ac1, %0, %1" : : "r" ((int)g10), "r" ((int)x2));
Chris@69: 
Chris@69:       asm volatile("MADD $ac1, %0, %1" : : "r" ((int)g11), "r" ((int)ADD32(x3,x1)));
Chris@69:       asm volatile("MADD $ac1, %0, %1" : : "r" ((int)g12), "r" ((int)ADD32(x4,x0)));
Chris@69:       asm volatile("EXTR.W %0,$ac1, %1" : "=r" (res): "i" (15));
Chris@69:       y[i] = x[i] + res;
Chris@69:       x4=x3;
Chris@69:       x3=x2;
Chris@69:       x2=x1;
Chris@69:       x1=x0;
Chris@69:    }
Chris@69: }
Chris@69: 
Chris@69: #endif /* __CELT_MIPSR1_H__ */