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 #ifdef HAVE_CONFIG_H 31 #include "config.h" 32 #endif 33 34 #define CELT_C 35 36 #include "os_support.h" 37 #include "mdct.h" 38 #include <math.h> 39 #include "celt.h" 40 #include "pitch.h" 41 #include "bands.h" 42 #include "modes.h" 43 #include "entcode.h" 44 #include "quant_bands.h" 45 #include "rate.h" 46 #include "stack_alloc.h" 47 #include "mathops.h" 48 #include "float_cast.h" 49 #include <stdarg.h> 50 #include "celt_lpc.h" 51 #include "vq.h" 52 53 #ifndef PACKAGE_VERSION 54 #define PACKAGE_VERSION "unknown" 55 #endif 56 57 58 int resampling_factor(opus_int32 rate) 59 { 60 int ret; 61 switch (rate) 62 { 63 case 48000: 64 ret = 1; 65 break; 66 case 24000: 67 ret = 2; 68 break; 69 case 16000: 70 ret = 3; 71 break; 72 case 12000: 73 ret = 4; 74 break; 75 case 8000: 76 ret = 6; 77 break; 78 default: 79 #ifndef CUSTOM_MODES 80 celt_assert(0); 81 #endif 82 ret = 0; 83 break; 84 } 85 return ret; 86 } 87 88 #ifndef OVERRIDE_COMB_FILTER_CONST 89 static void comb_filter_const(opus_val32 *y, opus_val32 *x, int T, int N, 90 opus_val16 g10, opus_val16 g11, opus_val16 g12) 91 { 92 opus_val32 x0, x1, x2, x3, x4; 93 int i; 94 x4 = x[-T-2]; 95 x3 = x[-T-1]; 96 x2 = x[-T]; 97 x1 = x[-T+1]; 98 for (i=0;i<N;i++) 99 { 100 x0=x[i-T+2]; 101 y[i] = x[i] 102 + MULT16_32_Q15(g10,x2) 103 + MULT16_32_Q15(g11,ADD32(x1,x3)) 104 + MULT16_32_Q15(g12,ADD32(x0,x4)); 105 x4=x3; 106 x3=x2; 107 x2=x1; 108 x1=x0; 109 } 110 111 } 112 #endif 113 114 void comb_filter(opus_val32 *y, opus_val32 *x, int T0, int T1, int N, 115 opus_val16 g0, opus_val16 g1, int tapset0, int tapset1, 116 const opus_val16 *window, int overlap) 117 { 118 int i; 119 /* printf ("%d %d %f %f\n", T0, T1, g0, g1); */ 120 opus_val16 g00, g01, g02, g10, g11, g12; 121 opus_val32 x0, x1, x2, x3, x4; 122 static const opus_val16 gains[3][3] = { 123 {QCONST16(0.3066406250f, 15), QCONST16(0.2170410156f, 15), QCONST16(0.1296386719f, 15)}, 124 {QCONST16(0.4638671875f, 15), QCONST16(0.2680664062f, 15), QCONST16(0.f, 15)}, 125 {QCONST16(0.7998046875f, 15), QCONST16(0.1000976562f, 15), QCONST16(0.f, 15)}}; 126 127 if (g0==0 && g1==0) 128 { 129 /* OPT: Happens to work without the OPUS_MOVE(), but only because the current encoder already copies x to y */ 130 if (x!=y) 131 OPUS_MOVE(y, x, N); 132 return; 133 } 134 g00 = MULT16_16_Q15(g0, gains[tapset0][0]); 135 g01 = MULT16_16_Q15(g0, gains[tapset0][1]); 136 g02 = MULT16_16_Q15(g0, gains[tapset0][2]); 137 g10 = MULT16_16_Q15(g1, gains[tapset1][0]); 138 g11 = MULT16_16_Q15(g1, gains[tapset1][1]); 139 g12 = MULT16_16_Q15(g1, gains[tapset1][2]); 140 x1 = x[-T1+1]; 141 x2 = x[-T1 ]; 142 x3 = x[-T1-1]; 143 x4 = x[-T1-2]; 144 for (i=0;i<overlap;i++) 145 { 146 opus_val16 f; 147 x0=x[i-T1+2]; 148 f = MULT16_16_Q15(window[i],window[i]); 149 y[i] = x[i] 150 + MULT16_32_Q15(MULT16_16_Q15((Q15ONE-f),g00),x[i-T0]) 151 + MULT16_32_Q15(MULT16_16_Q15((Q15ONE-f),g01),ADD32(x[i-T0+1],x[i-T0-1])) 152 + MULT16_32_Q15(MULT16_16_Q15((Q15ONE-f),g02),ADD32(x[i-T0+2],x[i-T0-2])) 153 + MULT16_32_Q15(MULT16_16_Q15(f,g10),x2) 154 + MULT16_32_Q15(MULT16_16_Q15(f,g11),ADD32(x1,x3)) 155 + MULT16_32_Q15(MULT16_16_Q15(f,g12),ADD32(x0,x4)); 156 x4=x3; 157 x3=x2; 158 x2=x1; 159 x1=x0; 160 161 } 162 if (g1==0) 163 { 164 /* OPT: Happens to work without the OPUS_MOVE(), but only because the current encoder already copies x to y */ 165 if (x!=y) 166 OPUS_MOVE(y+overlap, x+overlap, N-overlap); 167 return; 168 } 169 170 /* Compute the part with the constant filter. */ 171 comb_filter_const(y+i, x+i, T1, N-i, g10, g11, g12); 172 } 173 174 const signed char tf_select_table[4][8] = { 175 {0, -1, 0, -1, 0,-1, 0,-1}, 176 {0, -1, 0, -2, 1, 0, 1,-1}, 177 {0, -2, 0, -3, 2, 0, 1,-1}, 178 {0, -2, 0, -3, 3, 0, 1,-1}, 179 }; 180 181 182 void init_caps(const CELTMode *m,int *cap,int LM,int C) 183 { 184 int i; 185 for (i=0;i<m->nbEBands;i++) 186 { 187 int N; 188 N=(m->eBands[i+1]-m->eBands[i])<<LM; 189 cap[i] = (m->cache.caps[m->nbEBands*(2*LM+C-1)+i]+64)*C*N>>2; 190 } 191 } 192 193 194 195 const char *opus_strerror(int error) 196 { 197 static const char * const error_strings[8] = { 198 "success", 199 "invalid argument", 200 "buffer too small", 201 "internal error", 202 "corrupted stream", 203 "request not implemented", 204 "invalid state", 205 "memory allocation failed" 206 }; 207 if (error > 0 || error < -7) 208 return "unknown error"; 209 else 210 return error_strings[-error]; 211 } 212 213 const char *opus_get_version_string(void) 214 { 215 return "libopus " PACKAGE_VERSION 216 #ifdef FIXED_POINT 217 "-fixed" 218 #endif 219 #ifdef FUZZING 220 "-fuzzing" 221 #endif 222 ; 223 } 224
