| 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 | |
| 25 | #include "libavutil/common.h" |
| 26 | #include "libavutil/float_dsp.h" |
| 27 | #include "avcodec.h" |
| 28 | #include "acelp_vectors.h" |
| 29 | |
| 30 | const uint8_t ff_fc_2pulses_9bits_track1[16] = |
| 31 | { |
| 32 | 1, 3, |
| 33 | 6, 8, |
| 34 | 11, 13, |
| 35 | 16, 18, |
| 36 | 21, 23, |
| 37 | 26, 28, |
| 38 | 31, 33, |
| 39 | 36, 38 |
| 40 | }; |
| 41 | const uint8_t ff_fc_2pulses_9bits_track1_gray[16] = |
| 42 | { |
| 43 | 1, 3, |
| 44 | 8, 6, |
| 45 | 18, 16, |
| 46 | 11, 13, |
| 47 | 38, 36, |
| 48 | 31, 33, |
| 49 | 21, 23, |
| 50 | 28, 26, |
| 51 | }; |
| 52 | |
| 53 | const uint8_t ff_fc_2pulses_9bits_track2_gray[32] = |
| 54 | { |
| 55 | 0, 2, |
| 56 | 5, 4, |
| 57 | 12, 10, |
| 58 | 7, 9, |
| 59 | 25, 24, |
| 60 | 20, 22, |
| 61 | 14, 15, |
| 62 | 19, 17, |
| 63 | 36, 31, |
| 64 | 21, 26, |
| 65 | 1, 6, |
| 66 | 16, 11, |
| 67 | 27, 29, |
| 68 | 32, 30, |
| 69 | 39, 37, |
| 70 | 34, 35, |
| 71 | }; |
| 72 | |
| 73 | const uint8_t ff_fc_4pulses_8bits_tracks_13[16] = |
| 74 | { |
| 75 | 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, |
| 76 | }; |
| 77 | |
| 78 | const uint8_t ff_fc_4pulses_8bits_track_4[32] = |
| 79 | { |
| 80 | 3, 4, |
| 81 | 8, 9, |
| 82 | 13, 14, |
| 83 | 18, 19, |
| 84 | 23, 24, |
| 85 | 28, 29, |
| 86 | 33, 34, |
| 87 | 38, 39, |
| 88 | 43, 44, |
| 89 | 48, 49, |
| 90 | 53, 54, |
| 91 | 58, 59, |
| 92 | 63, 64, |
| 93 | 68, 69, |
| 94 | 73, 74, |
| 95 | 78, 79, |
| 96 | }; |
| 97 | |
| 98 | const float ff_pow_0_7[10] = { |
| 99 | 0.700000, 0.490000, 0.343000, 0.240100, 0.168070, |
| 100 | 0.117649, 0.082354, 0.057648, 0.040354, 0.028248 |
| 101 | }; |
| 102 | |
| 103 | const float ff_pow_0_75[10] = { |
| 104 | 0.750000, 0.562500, 0.421875, 0.316406, 0.237305, |
| 105 | 0.177979, 0.133484, 0.100113, 0.075085, 0.056314 |
| 106 | }; |
| 107 | |
| 108 | const float ff_pow_0_55[10] = { |
| 109 | 0.550000, 0.302500, 0.166375, 0.091506, 0.050328, |
| 110 | 0.027681, 0.015224, 0.008373, 0.004605, 0.002533 |
| 111 | }; |
| 112 | |
| 113 | const float ff_b60_sinc[61] = { |
| 114 | 0.898529 , 0.865051 , 0.769257 , 0.624054 , 0.448639 , 0.265289 , |
| 115 | 0.0959167 , -0.0412598 , -0.134338 , -0.178986 , -0.178528 , -0.142609 , |
| 116 | -0.0849304 , -0.0205078 , 0.0369568 , 0.0773926 , 0.0955200 , 0.0912781 , |
| 117 | 0.0689392 , 0.0357056 , 0.0 , -0.0305481 , -0.0504150 , -0.0570068 , |
| 118 | -0.0508423 , -0.0350037 , -0.0141602 , 0.00665283, 0.0230713 , 0.0323486 , |
| 119 | 0.0335388 , 0.0275879 , 0.0167847 , 0.00411987, -0.00747681, -0.0156860 , |
| 120 | -0.0193481 , -0.0183716 , -0.0137634 , -0.00704956, 0.0 , 0.00582886 , |
| 121 | 0.00939941, 0.0103760 , 0.00903320, 0.00604248, 0.00238037, -0.00109863 , |
| 122 | -0.00366211, -0.00497437, -0.00503540, -0.00402832, -0.00241089, -0.000579834, |
| 123 | 0.00103760, 0.00222778, 0.00277710, 0.00271606, 0.00213623, 0.00115967 , |
| 124 | 0. |
| 125 | }; |
| 126 | |
| 127 | void ff_acelp_fc_pulse_per_track( |
| 128 | int16_t* fc_v, |
| 129 | const uint8_t *tab1, |
| 130 | const uint8_t *tab2, |
| 131 | int pulse_indexes, |
| 132 | int pulse_signs, |
| 133 | int pulse_count, |
| 134 | int bits) |
| 135 | { |
| 136 | int mask = (1 << bits) - 1; |
| 137 | int i; |
| 138 | |
| 139 | for(i=0; i<pulse_count; i++) |
| 140 | { |
| 141 | fc_v[i + tab1[pulse_indexes & mask]] += |
| 142 | (pulse_signs & 1) ? 8191 : -8192; // +/-1 in (2.13) |
| 143 | |
| 144 | pulse_indexes >>= bits; |
| 145 | pulse_signs >>= 1; |
| 146 | } |
| 147 | |
| 148 | fc_v[tab2[pulse_indexes]] += (pulse_signs & 1) ? 8191 : -8192; |
| 149 | } |
| 150 | |
| 151 | void ff_decode_10_pulses_35bits(const int16_t *fixed_index, |
| 152 | AMRFixed *fixed_sparse, |
| 153 | const uint8_t *gray_decode, |
| 154 | int half_pulse_count, int bits) |
| 155 | { |
| 156 | int i; |
| 157 | int mask = (1 << bits) - 1; |
| 158 | |
| 159 | fixed_sparse->no_repeat_mask = 0; |
| 160 | fixed_sparse->n = 2 * half_pulse_count; |
| 161 | for (i = 0; i < half_pulse_count; i++) { |
| 162 | const int pos1 = gray_decode[fixed_index[2*i+1] & mask] + i; |
| 163 | const int pos2 = gray_decode[fixed_index[2*i ] & mask] + i; |
| 164 | const float sign = (fixed_index[2*i+1] & (1 << bits)) ? -1.0 : 1.0; |
| 165 | fixed_sparse->x[2*i+1] = pos1; |
| 166 | fixed_sparse->x[2*i ] = pos2; |
| 167 | fixed_sparse->y[2*i+1] = sign; |
| 168 | fixed_sparse->y[2*i ] = pos2 < pos1 ? -sign : sign; |
| 169 | } |
| 170 | } |
| 171 | |
| 172 | void ff_acelp_weighted_vector_sum( |
| 173 | int16_t* out, |
| 174 | const int16_t *in_a, |
| 175 | const int16_t *in_b, |
| 176 | int16_t weight_coeff_a, |
| 177 | int16_t weight_coeff_b, |
| 178 | int16_t rounder, |
| 179 | int shift, |
| 180 | int length) |
| 181 | { |
| 182 | int i; |
| 183 | |
| 184 | // Clipping required here; breaks OVERFLOW test. |
| 185 | for(i=0; i<length; i++) |
| 186 | out[i] = av_clip_int16(( |
| 187 | in_a[i] * weight_coeff_a + |
| 188 | in_b[i] * weight_coeff_b + |
| 189 | rounder) >> shift); |
| 190 | } |
| 191 | |
| 192 | void ff_weighted_vector_sumf(float *out, const float *in_a, const float *in_b, |
| 193 | float weight_coeff_a, float weight_coeff_b, int length) |
| 194 | { |
| 195 | int i; |
| 196 | |
| 197 | for(i=0; i<length; i++) |
| 198 | out[i] = weight_coeff_a * in_a[i] |
| 199 | + weight_coeff_b * in_b[i]; |
| 200 | } |
| 201 | |
| 202 | void ff_adaptive_gain_control(float *out, const float *in, float speech_energ, |
| 203 | int size, float alpha, float *gain_mem) |
| 204 | { |
| 205 | int i; |
| 206 | float postfilter_energ = avpriv_scalarproduct_float_c(in, in, size); |
| 207 | float gain_scale_factor = 1.0; |
| 208 | float mem = *gain_mem; |
| 209 | |
| 210 | if (postfilter_energ) |
| 211 | gain_scale_factor = sqrt(speech_energ / postfilter_energ); |
| 212 | |
| 213 | gain_scale_factor *= 1.0 - alpha; |
| 214 | |
| 215 | for (i = 0; i < size; i++) { |
| 216 | mem = alpha * mem + gain_scale_factor; |
| 217 | out[i] = in[i] * mem; |
| 218 | } |
| 219 | |
| 220 | *gain_mem = mem; |
| 221 | } |
| 222 | |
| 223 | void ff_scale_vector_to_given_sum_of_squares(float *out, const float *in, |
| 224 | float sum_of_squares, const int n) |
| 225 | { |
| 226 | int i; |
| 227 | float scalefactor = avpriv_scalarproduct_float_c(in, in, n); |
| 228 | if (scalefactor) |
| 229 | scalefactor = sqrt(sum_of_squares / scalefactor); |
| 230 | for (i = 0; i < n; i++) |
| 231 | out[i] = in[i] * scalefactor; |
| 232 | } |
| 233 | |
| 234 | void ff_set_fixed_vector(float *out, const AMRFixed *in, float scale, int size) |
| 235 | { |
| 236 | int i; |
| 237 | |
| 238 | for (i=0; i < in->n; i++) { |
| 239 | int x = in->x[i], repeats = !((in->no_repeat_mask >> i) & 1); |
| 240 | float y = in->y[i] * scale; |
| 241 | |
| 242 | if (in->pitch_lag > 0) |
| 243 | do { |
| 244 | out[x] += y; |
| 245 | y *= in->pitch_fac; |
| 246 | x += in->pitch_lag; |
| 247 | } while (x < size && repeats); |
| 248 | } |
| 249 | } |
| 250 | |
| 251 | void ff_clear_fixed_vector(float *out, const AMRFixed *in, int size) |
| 252 | { |
| 253 | int i; |
| 254 | |
| 255 | for (i=0; i < in->n; i++) { |
| 256 | int x = in->x[i], repeats = !((in->no_repeat_mask >> i) & 1); |
| 257 | |
| 258 | if (in->pitch_lag > 0) |
| 259 | do { |
| 260 | out[x] = 0.0; |
| 261 | x += in->pitch_lag; |
| 262 | } while (x < size && repeats); |
| 263 | } |
| 264 | } |
| 265 | |
| 266 | void ff_acelp_vectors_init(ACELPVContext *c) |
| 267 | { |
| 268 | c->weighted_vector_sumf = ff_weighted_vector_sumf; |
| 269 | |
| 270 | if(HAVE_MIPSFPU) |
| 271 | ff_acelp_vectors_init_mips(c); |
| 272 | } |