| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Header file for hardcoded Parametric Stereo tables | ||
| 3 | * | ||
| 4 | * Copyright (c) 2010 Alex Converse <alex.converse@gmail.com> | ||
| 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 | #ifndef AVCODEC_AACPS_TABLEGEN_H | ||
| 24 | #define AVCODEC_AACPS_TABLEGEN_H | ||
| 25 | |||
| 26 | #include <math.h> | ||
| 27 | #include <stdint.h> | ||
| 28 | |||
| 29 | #if CONFIG_HARDCODED_TABLES | ||
| 30 | #define ps_tableinit() | ||
| 31 | #define TABLE_CONST const | ||
| 32 | #include "libavcodec/aacps_tables.h" | ||
| 33 | #else | ||
| 34 | #include "libavutil/common.h" | ||
| 35 | #include "libavutil/mathematics.h" | ||
| 36 | #include "libavutil/mem_internal.h" | ||
| 37 | #define NR_ALLPASS_BANDS20 30 | ||
| 38 | #define NR_ALLPASS_BANDS34 50 | ||
| 39 | #define PS_AP_LINKS 3 | ||
| 40 | #define TABLE_CONST | ||
| 41 | static float pd_re_smooth[8*8*8]; | ||
| 42 | static float pd_im_smooth[8*8*8]; | ||
| 43 | static float HA[46][8][4]; | ||
| 44 | static float HB[46][8][4]; | ||
| 45 | static DECLARE_ALIGNED(16, float, f20_0_8) [ 8][8][2]; | ||
| 46 | static DECLARE_ALIGNED(16, float, f34_0_12)[12][8][2]; | ||
| 47 | static DECLARE_ALIGNED(16, float, f34_1_8) [ 8][8][2]; | ||
| 48 | static DECLARE_ALIGNED(16, float, f34_2_4) [ 4][8][2]; | ||
| 49 | static TABLE_CONST DECLARE_ALIGNED(16, float, Q_fract_allpass)[2][50][3][2]; | ||
| 50 | static DECLARE_ALIGNED(16, float, phi_fract)[2][50][2]; | ||
| 51 | |||
| 52 | static const float g0_Q8[] = { | ||
| 53 | 0.00746082949812f, 0.02270420949825f, 0.04546865930473f, 0.07266113929591f, | ||
| 54 | 0.09885108575264f, 0.11793710567217f, 0.125f | ||
| 55 | }; | ||
| 56 | |||
| 57 | static const float g0_Q12[] = { | ||
| 58 | 0.04081179924692f, 0.03812810994926f, 0.05144908135699f, 0.06399831151592f, | ||
| 59 | 0.07428313801106f, 0.08100347892914f, 0.08333333333333f | ||
| 60 | }; | ||
| 61 | |||
| 62 | static const float g1_Q8[] = { | ||
| 63 | 0.01565675600122f, 0.03752716391991f, 0.05417891378782f, 0.08417044116767f, | ||
| 64 | 0.10307344158036f, 0.12222452249753f, 0.125f | ||
| 65 | }; | ||
| 66 | |||
| 67 | static const float g2_Q4[] = { | ||
| 68 | -0.05908211155639f, -0.04871498374946f, 0.0f, 0.07778723915851f, | ||
| 69 | 0.16486303567403f, 0.23279856662996f, 0.25f | ||
| 70 | }; | ||
| 71 | |||
| 72 | 972 | static av_cold void make_filters_from_proto(float (*filter)[8][2], const float *proto, int bands) | |
| 73 | { | ||
| 74 | int q, n; | ||
| 75 |
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8748 | for (q = 0; q < bands; q++) { |
| 76 |
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62208 | for (n = 0; n < 7; n++) { |
| 77 | 54432 | double theta = 2 * M_PI * (q + 0.5) * (n - 6) / bands; | |
| 78 | 54432 | filter[q][n][0] = proto[n] * cos(theta); | |
| 79 | 54432 | filter[q][n][1] = proto[n] * -sin(theta); | |
| 80 | } | ||
| 81 | } | ||
| 82 | 972 | } | |
| 83 | |||
| 84 | 243 | static av_cold void ps_tableinit(void) | |
| 85 | { | ||
| 86 | static const float ipdopd_sin[] = { 0, M_SQRT1_2, 1, M_SQRT1_2, 0, -M_SQRT1_2, -1, -M_SQRT1_2 }; | ||
| 87 | static const float ipdopd_cos[] = { 1, M_SQRT1_2, 0, -M_SQRT1_2, -1, -M_SQRT1_2, 0, M_SQRT1_2 }; | ||
| 88 | int pd0, pd1, pd2; | ||
| 89 | |||
| 90 | static const float iid_par_dequant[] = { | ||
| 91 | //iid_par_dequant_default | ||
| 92 | 0.05623413251903, 0.12589254117942, 0.19952623149689, 0.31622776601684, | ||
| 93 | 0.44668359215096, 0.63095734448019, 0.79432823472428, 1, | ||
| 94 | 1.25892541179417, 1.58489319246111, 2.23872113856834, 3.16227766016838, | ||
| 95 | 5.01187233627272, 7.94328234724282, 17.7827941003892, | ||
| 96 | //iid_par_dequant_fine | ||
| 97 | 0.00316227766017, 0.00562341325190, 0.01, 0.01778279410039, | ||
| 98 | 0.03162277660168, 0.05623413251903, 0.07943282347243, 0.11220184543020, | ||
| 99 | 0.15848931924611, 0.22387211385683, 0.31622776601684, 0.39810717055350, | ||
| 100 | 0.50118723362727, 0.63095734448019, 0.79432823472428, 1, | ||
| 101 | 1.25892541179417, 1.58489319246111, 1.99526231496888, 2.51188643150958, | ||
| 102 | 3.16227766016838, 4.46683592150963, 6.30957344480193, 8.91250938133745, | ||
| 103 | 12.5892541179417, 17.7827941003892, 31.6227766016838, 56.2341325190349, | ||
| 104 | 100, 177.827941003892, 316.227766016837, | ||
| 105 | }; | ||
| 106 | static const float icc_invq[] = { | ||
| 107 | 1, 0.937, 0.84118, 0.60092, 0.36764, 0, -0.589, -1 | ||
| 108 | }; | ||
| 109 | static const float acos_icc_invq[] = { | ||
| 110 | 0, 0.35685527, 0.57133466, 0.92614472, 1.1943263, M_PI/2, 2.2006171, M_PI | ||
| 111 | }; | ||
| 112 | int iid, icc; | ||
| 113 | |||
| 114 | int k, m; | ||
| 115 | static const int8_t f_center_20[] = { | ||
| 116 | -3, -1, 1, 3, 5, 7, 10, 14, 18, 22, | ||
| 117 | }; | ||
| 118 | static const int8_t f_center_34[] = { | ||
| 119 | 2, 6, 10, 14, 18, 22, 26, 30, | ||
| 120 | 34,-10, -6, -2, 51, 57, 15, 21, | ||
| 121 | 27, 33, 39, 45, 54, 66, 78, 42, | ||
| 122 | 102, 66, 78, 90,102,114,126, 90, | ||
| 123 | }; | ||
| 124 | static const float fractional_delay_links[] = { 0.43f, 0.75f, 0.347f }; | ||
| 125 | 243 | const float fractional_delay_gain = 0.39f; | |
| 126 | |||
| 127 |
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2187 | for (pd0 = 0; pd0 < 8; pd0++) { |
| 128 | 1944 | float pd0_re = ipdopd_cos[pd0]; | |
| 129 | 1944 | float pd0_im = ipdopd_sin[pd0]; | |
| 130 |
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17496 | for (pd1 = 0; pd1 < 8; pd1++) { |
| 131 | 15552 | float pd1_re = ipdopd_cos[pd1]; | |
| 132 | 15552 | float pd1_im = ipdopd_sin[pd1]; | |
| 133 |
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139968 | for (pd2 = 0; pd2 < 8; pd2++) { |
| 134 | 124416 | float pd2_re = ipdopd_cos[pd2]; | |
| 135 | 124416 | float pd2_im = ipdopd_sin[pd2]; | |
| 136 | 124416 | float re_smooth = 0.25f * pd0_re + 0.5f * pd1_re + pd2_re; | |
| 137 | 124416 | float im_smooth = 0.25f * pd0_im + 0.5f * pd1_im + pd2_im; | |
| 138 | 124416 | float pd_mag = 1 / hypot(im_smooth, re_smooth); | |
| 139 | 124416 | pd_re_smooth[pd0*64+pd1*8+pd2] = re_smooth * pd_mag; | |
| 140 | 124416 | pd_im_smooth[pd0*64+pd1*8+pd2] = im_smooth * pd_mag; | |
| 141 | } | ||
| 142 | } | ||
| 143 | } | ||
| 144 | |||
| 145 |
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11421 | for (iid = 0; iid < 46; iid++) { |
| 146 | 11178 | float c = iid_par_dequant[iid]; ///< Linear Inter-channel Intensity Difference | |
| 147 | 11178 | float c1 = (float)M_SQRT2 / sqrtf(1.0f + c*c); | |
| 148 | 11178 | float c2 = c * c1; | |
| 149 |
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100602 | for (icc = 0; icc < 8; icc++) { |
| 150 | /*if (PS_BASELINE || ps->icc_mode < 3)*/ { | ||
| 151 | 89424 | float alpha = 0.5f * acos_icc_invq[icc]; | |
| 152 | 89424 | float beta = alpha * (c1 - c2) * (float)M_SQRT1_2; | |
| 153 | 89424 | HA[iid][icc][0] = c2 * cosf(beta + alpha); | |
| 154 | 89424 | HA[iid][icc][1] = c1 * cosf(beta - alpha); | |
| 155 | 89424 | HA[iid][icc][2] = c2 * sinf(beta + alpha); | |
| 156 | 89424 | HA[iid][icc][3] = c1 * sinf(beta - alpha); | |
| 157 | } /* else */ { | ||
| 158 | float alpha, gamma, mu, rho; | ||
| 159 | float alpha_c, alpha_s, gamma_c, gamma_s; | ||
| 160 |
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89424 | rho = FFMAX(icc_invq[icc], 0.05f); |
| 161 | 89424 | alpha = 0.5f * atan2f(2.0f * c * rho, c*c - 1.0f); | |
| 162 | 89424 | mu = c + 1.0f / c; | |
| 163 | 89424 | mu = sqrtf(1 + (4 * rho * rho - 4)/(mu * mu)); | |
| 164 | 89424 | gamma = atanf(sqrtf((1.0f - mu)/(1.0f + mu))); | |
| 165 |
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89424 | if (alpha < 0) alpha += M_PI/2; |
| 166 | 89424 | alpha_c = cosf(alpha); | |
| 167 | 89424 | alpha_s = sinf(alpha); | |
| 168 | 89424 | gamma_c = cosf(gamma); | |
| 169 | 89424 | gamma_s = sinf(gamma); | |
| 170 | 89424 | HB[iid][icc][0] = M_SQRT2 * alpha_c * gamma_c; | |
| 171 | 89424 | HB[iid][icc][1] = M_SQRT2 * alpha_s * gamma_c; | |
| 172 | 89424 | HB[iid][icc][2] = -M_SQRT2 * alpha_s * gamma_s; | |
| 173 | 89424 | HB[iid][icc][3] = M_SQRT2 * alpha_c * gamma_s; | |
| 174 | } | ||
| 175 | } | ||
| 176 | } | ||
| 177 | |||
| 178 |
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7533 | for (k = 0; k < NR_ALLPASS_BANDS20; k++) { |
| 179 | double f_center, theta; | ||
| 180 |
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7290 | if (k < FF_ARRAY_ELEMS(f_center_20)) |
| 181 | 2430 | f_center = f_center_20[k] * 0.125; | |
| 182 | else | ||
| 183 | 4860 | f_center = k - 6.5f; | |
| 184 |
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29160 | for (m = 0; m < PS_AP_LINKS; m++) { |
| 185 | 21870 | theta = -M_PI * fractional_delay_links[m] * f_center; | |
| 186 | 21870 | Q_fract_allpass[0][k][m][0] = cos(theta); | |
| 187 | 21870 | Q_fract_allpass[0][k][m][1] = sin(theta); | |
| 188 | } | ||
| 189 | 7290 | theta = -M_PI*fractional_delay_gain*f_center; | |
| 190 | 7290 | phi_fract[0][k][0] = cos(theta); | |
| 191 | 7290 | phi_fract[0][k][1] = sin(theta); | |
| 192 | } | ||
| 193 |
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12393 | for (k = 0; k < NR_ALLPASS_BANDS34; k++) { |
| 194 | double f_center, theta; | ||
| 195 |
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12150 | if (k < FF_ARRAY_ELEMS(f_center_34)) |
| 196 | 7776 | f_center = f_center_34[k] / 24.0; | |
| 197 | else | ||
| 198 | 4374 | f_center = k - 26.5f; | |
| 199 |
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48600 | for (m = 0; m < PS_AP_LINKS; m++) { |
| 200 | 36450 | theta = -M_PI * fractional_delay_links[m] * f_center; | |
| 201 | 36450 | Q_fract_allpass[1][k][m][0] = cos(theta); | |
| 202 | 36450 | Q_fract_allpass[1][k][m][1] = sin(theta); | |
| 203 | } | ||
| 204 | 12150 | theta = -M_PI*fractional_delay_gain*f_center; | |
| 205 | 12150 | phi_fract[1][k][0] = cos(theta); | |
| 206 | 12150 | phi_fract[1][k][1] = sin(theta); | |
| 207 | } | ||
| 208 | |||
| 209 | 243 | make_filters_from_proto(f20_0_8, g0_Q8, 8); | |
| 210 | 243 | make_filters_from_proto(f34_0_12, g0_Q12, 12); | |
| 211 | 243 | make_filters_from_proto(f34_1_8, g1_Q8, 8); | |
| 212 | 243 | make_filters_from_proto(f34_2_4, g2_Q4, 4); | |
| 213 | 243 | } | |
| 214 | #endif /* CONFIG_HARDCODED_TABLES */ | ||
| 215 | |||
| 216 | #endif /* AVCODEC_AACPS_TABLEGEN_H */ | ||
| 217 |