1/* 2 * adaptive and fixed codebook vector operations for ACELP-based codecs 3 * 4 * Copyright (c) 2008 Vladimir Voroshilov 5 * 6 * This file is part of FFmpeg. 7 * 8 * FFmpeg is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Lesser General Public 10 * License as published by the Free Software Foundation; either 11 * version 2.1 of the License, or (at your option) any later version. 12 * 13 * FFmpeg is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * Lesser General Public License for more details. 17 * 18 * You should have received a copy of the GNU Lesser General Public 19 * License along with FFmpeg; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 21 */ 22 23#include <inttypes.h> 24#include "avcodec.h" 25#include "acelp_vectors.h" 26#include "celp_math.h" 27 28const uint8_t ff_fc_2pulses_9bits_track1[16] = 29{ 30 1, 3, 31 6, 8, 32 11, 13, 33 16, 18, 34 21, 23, 35 26, 28, 36 31, 33, 37 36, 38 38}; 39const uint8_t ff_fc_2pulses_9bits_track1_gray[16] = 40{ 41 1, 3, 42 8, 6, 43 18, 16, 44 11, 13, 45 38, 36, 46 31, 33, 47 21, 23, 48 28, 26, 49}; 50 51const uint8_t ff_fc_2pulses_9bits_track2_gray[32] = 52{ 53 0, 2, 54 5, 4, 55 12, 10, 56 7, 9, 57 25, 24, 58 20, 22, 59 14, 15, 60 19, 17, 61 36, 31, 62 21, 26, 63 1, 6, 64 16, 11, 65 27, 29, 66 32, 30, 67 39, 37, 68 34, 35, 69}; 70 71const uint8_t ff_fc_4pulses_8bits_tracks_13[16] = 72{ 73 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 74}; 75 76const uint8_t ff_fc_4pulses_8bits_track_4[32] = 77{ 78 3, 4, 79 8, 9, 80 13, 14, 81 18, 19, 82 23, 24, 83 28, 29, 84 33, 34, 85 38, 39, 86 43, 44, 87 48, 49, 88 53, 54, 89 58, 59, 90 63, 64, 91 68, 69, 92 73, 74, 93 78, 79, 94}; 95 96#if 0 97static uint8_t gray_decode[32] = 98{ 99 0, 1, 3, 2, 7, 6, 4, 5, 100 15, 14, 12, 13, 8, 9, 11, 10, 101 31, 30, 28, 29, 24, 25, 27, 26, 102 16, 17, 19, 18, 23, 22, 20, 21 103}; 104#endif 105 106const float ff_pow_0_7[10] = { 107 0.700000, 0.490000, 0.343000, 0.240100, 0.168070, 108 0.117649, 0.082354, 0.057648, 0.040354, 0.028248 109}; 110 111const float ff_pow_0_75[10] = { 112 0.750000, 0.562500, 0.421875, 0.316406, 0.237305, 113 0.177979, 0.133484, 0.100113, 0.075085, 0.056314 114}; 115 116const float ff_pow_0_55[10] = { 117 0.550000, 0.302500, 0.166375, 0.091506, 0.050328, 118 0.027681, 0.015224, 0.008373, 0.004605, 0.002533 119}; 120 121const float ff_b60_sinc[61] = { 122 0.898529 , 0.865051 , 0.769257 , 0.624054 , 0.448639 , 0.265289 , 123 0.0959167 , -0.0412598 , -0.134338 , -0.178986 , -0.178528 , -0.142609 , 124-0.0849304 , -0.0205078 , 0.0369568 , 0.0773926 , 0.0955200 , 0.0912781 , 125 0.0689392 , 0.0357056 , 0. , -0.0305481 , -0.0504150 , -0.0570068 , 126-0.0508423 , -0.0350037 , -0.0141602 , 0.00665283, 0.0230713 , 0.0323486 , 127 0.0335388 , 0.0275879 , 0.0167847 , 0.00411987, -0.00747681, -0.0156860 , 128-0.0193481 , -0.0183716 , -0.0137634 , -0.00704956, 0. , 0.00582886 , 129 0.00939941, 0.0103760 , 0.00903320, 0.00604248, 0.00238037, -0.00109863 , 130-0.00366211, -0.00497437, -0.00503540, -0.00402832, -0.00241089, -0.000579834, 131 0.00103760, 0.00222778, 0.00277710, 0.00271606, 0.00213623, 0.00115967 , 132 0. 133}; 134 135void ff_acelp_fc_pulse_per_track( 136 int16_t* fc_v, 137 const uint8_t *tab1, 138 const uint8_t *tab2, 139 int pulse_indexes, 140 int pulse_signs, 141 int pulse_count, 142 int bits) 143{ 144 int mask = (1 << bits) - 1; 145 int i; 146 147 for(i=0; i<pulse_count; i++) 148 { 149 fc_v[i + tab1[pulse_indexes & mask]] += 150 (pulse_signs & 1) ? 8191 : -8192; // +/-1 in (2.13) 151 152 pulse_indexes >>= bits; 153 pulse_signs >>= 1; 154 } 155 156 fc_v[tab2[pulse_indexes]] += (pulse_signs & 1) ? 8191 : -8192; 157} 158 159void ff_decode_10_pulses_35bits(const int16_t *fixed_index, 160 AMRFixed *fixed_sparse, 161 const uint8_t *gray_decode, 162 int half_pulse_count, int bits) 163{ 164 int i; 165 int mask = (1 << bits) - 1; 166 167 fixed_sparse->no_repeat_mask = 0; 168 fixed_sparse->n = 2 * half_pulse_count; 169 for (i = 0; i < half_pulse_count; i++) { 170 const int pos1 = gray_decode[fixed_index[2*i+1] & mask] + i; 171 const int pos2 = gray_decode[fixed_index[2*i ] & mask] + i; 172 const float sign = (fixed_index[2*i+1] & (1 << bits)) ? -1.0 : 1.0; 173 fixed_sparse->x[2*i+1] = pos1; 174 fixed_sparse->x[2*i ] = pos2; 175 fixed_sparse->y[2*i+1] = sign; 176 fixed_sparse->y[2*i ] = pos2 < pos1 ? -sign : sign; 177 } 178} 179 180void ff_acelp_weighted_vector_sum( 181 int16_t* out, 182 const int16_t *in_a, 183 const int16_t *in_b, 184 int16_t weight_coeff_a, 185 int16_t weight_coeff_b, 186 int16_t rounder, 187 int shift, 188 int length) 189{ 190 int i; 191 192 // Clipping required here; breaks OVERFLOW test. 193 for(i=0; i<length; i++) 194 out[i] = av_clip_int16(( 195 in_a[i] * weight_coeff_a + 196 in_b[i] * weight_coeff_b + 197 rounder) >> shift); 198} 199 200void ff_weighted_vector_sumf(float *out, const float *in_a, const float *in_b, 201 float weight_coeff_a, float weight_coeff_b, int length) 202{ 203 int i; 204 205 for(i=0; i<length; i++) 206 out[i] = weight_coeff_a * in_a[i] 207 + weight_coeff_b * in_b[i]; 208} 209 210void ff_adaptive_gain_control(float *out, const float *in, float speech_energ, 211 int size, float alpha, float *gain_mem) 212{ 213 int i; 214 float postfilter_energ = ff_dot_productf(in, in, size); 215 float gain_scale_factor = 1.0; 216 float mem = *gain_mem; 217 218 if (postfilter_energ) 219 gain_scale_factor = sqrt(speech_energ / postfilter_energ); 220 221 gain_scale_factor *= 1.0 - alpha; 222 223 for (i = 0; i < size; i++) { 224 mem = alpha * mem + gain_scale_factor; 225 out[i] = in[i] * mem; 226 } 227 228 *gain_mem = mem; 229} 230 231void ff_scale_vector_to_given_sum_of_squares(float *out, const float *in, 232 float sum_of_squares, const int n) 233{ 234 int i; 235 float scalefactor = ff_dot_productf(in, in, n); 236 if (scalefactor) 237 scalefactor = sqrt(sum_of_squares / scalefactor); 238 for (i = 0; i < n; i++) 239 out[i] = in[i] * scalefactor; 240} 241 242void ff_set_fixed_vector(float *out, const AMRFixed *in, float scale, int size) 243{ 244 int i; 245 246 for (i=0; i < in->n; i++) { 247 int x = in->x[i], repeats = !((in->no_repeat_mask >> i) & 1); 248 float y = in->y[i] * scale; 249 250 do { 251 out[x] += y; 252 y *= in->pitch_fac; 253 x += in->pitch_lag; 254 } while (x < size && repeats); 255 } 256} 257 258void ff_clear_fixed_vector(float *out, const AMRFixed *in, int size) 259{ 260 int i; 261 262 for (i=0; i < in->n; i++) { 263 int x = in->x[i], repeats = !((in->no_repeat_mask >> i) & 1); 264 265 do { 266 out[x] = 0.0; 267 x += in->pitch_lag; 268 } while (x < size && repeats); 269 } 270} 271