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 57 void comb_filter(opus_val32 *y, opus_val32 *x, int T0, int T1, int N, 58 opus_val16 g0, opus_val16 g1, int tapset0, int tapset1, 59 const opus_val16 *window, int overlap, int arch) 60 { 61 int i; 62 opus_val32 x0, x1, x2, x3, x4; 63 64 (void)arch; 65 66 /* printf ("%d %d %f %f\n", T0, T1, g0, g1); */ 67 opus_val16 g00, g01, g02, g10, g11, g12; 68 static const opus_val16 gains[3][3] = { 69 {QCONST16(0.3066406250f, 15), QCONST16(0.2170410156f, 15), QCONST16(0.1296386719f, 15)}, 70 {QCONST16(0.4638671875f, 15), QCONST16(0.2680664062f, 15), QCONST16(0.f, 15)}, 71 {QCONST16(0.7998046875f, 15), QCONST16(0.1000976562f, 15), QCONST16(0.f, 15)}}; 72 73 if (g0==0 && g1==0) 74 { 75 /* OPT: Happens to work without the OPUS_MOVE(), but only because the current encoder already copies x to y */ 76 if (x!=y) 77 OPUS_MOVE(y, x, N); 78 return; 79 } 80 81 g00 = MULT16_16_P15(g0, gains[tapset0][0]); 82 g01 = MULT16_16_P15(g0, gains[tapset0][1]); 83 g02 = MULT16_16_P15(g0, gains[tapset0][2]); 84 g10 = MULT16_16_P15(g1, gains[tapset1][0]); 85 g11 = MULT16_16_P15(g1, gains[tapset1][1]); 86 g12 = MULT16_16_P15(g1, gains[tapset1][2]); 87 x1 = x[-T1+1]; 88 x2 = x[-T1 ]; 89 x3 = x[-T1-1]; 90 x4 = x[-T1-2]; 91 /* If the filter didn't change, we don't need the overlap */ 92 if (g0==g1 && T0==T1 && tapset0==tapset1) 93 overlap=0; 94 95 for (i=0;i<overlap;i++) 96 { 97 opus_val16 f; 98 opus_val32 res; 99 f = MULT16_16_Q15(window[i],window[i]); 100 x0= x[i-T1+2]; 101 102 asm volatile("MULT $ac1, %0, %1" : : "r" ((int)MULT16_16_Q15((Q15ONE-f),g00)), "r" ((int)x[i-T0])); 103 104 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]))); 105 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]))); 106 asm volatile("MADD $ac1, %0, %1" : : "r" ((int)MULT16_16_Q15(f,g10)), "r" ((int)x2)); 107 asm volatile("MADD $ac1, %0, %1" : : "r" ((int)MULT16_16_Q15(f,g11)), "r" ((int)ADD32(x3,x1))); 108 asm volatile("MADD $ac1, %0, %1" : : "r" ((int)MULT16_16_Q15(f,g12)), "r" ((int)ADD32(x4,x0))); 109 110 asm volatile("EXTR.W %0,$ac1, %1" : "=r" (res): "i" (15)); 111 112 y[i] = x[i] + res; 113 114 x4=x3; 115 x3=x2; 116 x2=x1; 117 x1=x0; 118 } 119 120 x4 = x[i-T1-2]; 121 x3 = x[i-T1-1]; 122 x2 = x[i-T1]; 123 x1 = x[i-T1+1]; 124 125 if (g1==0) 126 { 127 /* OPT: Happens to work without the OPUS_MOVE(), but only because the current encoder already copies x to y */ 128 if (x!=y) 129 OPUS_MOVE(y+overlap, x+overlap, N-overlap); 130 return; 131 } 132 133 for (i=overlap;i<N;i++) 134 { 135 opus_val32 res; 136 x0=x[i-T1+2]; 137 138 asm volatile("MULT $ac1, %0, %1" : : "r" ((int)g10), "r" ((int)x2)); 139 140 asm volatile("MADD $ac1, %0, %1" : : "r" ((int)g11), "r" ((int)ADD32(x3,x1))); 141 asm volatile("MADD $ac1, %0, %1" : : "r" ((int)g12), "r" ((int)ADD32(x4,x0))); 142 asm volatile("EXTR.W %0,$ac1, %1" : "=r" (res): "i" (15)); 143 y[i] = x[i] + res; 144 x4=x3; 145 x3=x2; 146 x2=x1; 147 x1=x0; 148 } 149 } 150 151 #endif /* __CELT_MIPSR1_H__ */ 152
