blob: 0ac4f68d68d692e01c871c4ec4a01865fb475900
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/libm.h" |
36 | #include "libavutil/mathematics.h" |
37 | #include "libavutil/mem.h" |
38 | #define NR_ALLPASS_BANDS20 30 |
39 | #define NR_ALLPASS_BANDS34 50 |
40 | #define PS_AP_LINKS 3 |
41 | #define TABLE_CONST |
42 | static float pd_re_smooth[8*8*8]; |
43 | static float pd_im_smooth[8*8*8]; |
44 | static float HA[46][8][4]; |
45 | static float HB[46][8][4]; |
46 | static DECLARE_ALIGNED(16, float, f20_0_8) [ 8][8][2]; |
47 | static DECLARE_ALIGNED(16, float, f34_0_12)[12][8][2]; |
48 | static DECLARE_ALIGNED(16, float, f34_1_8) [ 8][8][2]; |
49 | static DECLARE_ALIGNED(16, float, f34_2_4) [ 4][8][2]; |
50 | static TABLE_CONST DECLARE_ALIGNED(16, float, Q_fract_allpass)[2][50][3][2]; |
51 | static DECLARE_ALIGNED(16, float, phi_fract)[2][50][2]; |
52 | |
53 | static const float g0_Q8[] = { |
54 | 0.00746082949812f, 0.02270420949825f, 0.04546865930473f, 0.07266113929591f, |
55 | 0.09885108575264f, 0.11793710567217f, 0.125f |
56 | }; |
57 | |
58 | static const float g0_Q12[] = { |
59 | 0.04081179924692f, 0.03812810994926f, 0.05144908135699f, 0.06399831151592f, |
60 | 0.07428313801106f, 0.08100347892914f, 0.08333333333333f |
61 | }; |
62 | |
63 | static const float g1_Q8[] = { |
64 | 0.01565675600122f, 0.03752716391991f, 0.05417891378782f, 0.08417044116767f, |
65 | 0.10307344158036f, 0.12222452249753f, 0.125f |
66 | }; |
67 | |
68 | static const float g2_Q4[] = { |
69 | -0.05908211155639f, -0.04871498374946f, 0.0f, 0.07778723915851f, |
70 | 0.16486303567403f, 0.23279856662996f, 0.25f |
71 | }; |
72 | |
73 | static av_cold void make_filters_from_proto(float (*filter)[8][2], const float *proto, int bands) |
74 | { |
75 | int q, n; |
76 | for (q = 0; q < bands; q++) { |
77 | for (n = 0; n < 7; n++) { |
78 | double theta = 2 * M_PI * (q + 0.5) * (n - 6) / bands; |
79 | filter[q][n][0] = proto[n] * cos(theta); |
80 | filter[q][n][1] = proto[n] * -sin(theta); |
81 | } |
82 | } |
83 | } |
84 | |
85 | static av_cold void ps_tableinit(void) |
86 | { |
87 | static const float ipdopd_sin[] = { 0, M_SQRT1_2, 1, M_SQRT1_2, 0, -M_SQRT1_2, -1, -M_SQRT1_2 }; |
88 | static const float ipdopd_cos[] = { 1, M_SQRT1_2, 0, -M_SQRT1_2, -1, -M_SQRT1_2, 0, M_SQRT1_2 }; |
89 | int pd0, pd1, pd2; |
90 | |
91 | static const float iid_par_dequant[] = { |
92 | //iid_par_dequant_default |
93 | 0.05623413251903, 0.12589254117942, 0.19952623149689, 0.31622776601684, |
94 | 0.44668359215096, 0.63095734448019, 0.79432823472428, 1, |
95 | 1.25892541179417, 1.58489319246111, 2.23872113856834, 3.16227766016838, |
96 | 5.01187233627272, 7.94328234724282, 17.7827941003892, |
97 | //iid_par_dequant_fine |
98 | 0.00316227766017, 0.00562341325190, 0.01, 0.01778279410039, |
99 | 0.03162277660168, 0.05623413251903, 0.07943282347243, 0.11220184543020, |
100 | 0.15848931924611, 0.22387211385683, 0.31622776601684, 0.39810717055350, |
101 | 0.50118723362727, 0.63095734448019, 0.79432823472428, 1, |
102 | 1.25892541179417, 1.58489319246111, 1.99526231496888, 2.51188643150958, |
103 | 3.16227766016838, 4.46683592150963, 6.30957344480193, 8.91250938133745, |
104 | 12.5892541179417, 17.7827941003892, 31.6227766016838, 56.2341325190349, |
105 | 100, 177.827941003892, 316.227766016837, |
106 | }; |
107 | static const float icc_invq[] = { |
108 | 1, 0.937, 0.84118, 0.60092, 0.36764, 0, -0.589, -1 |
109 | }; |
110 | static const float acos_icc_invq[] = { |
111 | 0, 0.35685527, 0.57133466, 0.92614472, 1.1943263, M_PI/2, 2.2006171, M_PI |
112 | }; |
113 | int iid, icc; |
114 | |
115 | int k, m; |
116 | static const int8_t f_center_20[] = { |
117 | -3, -1, 1, 3, 5, 7, 10, 14, 18, 22, |
118 | }; |
119 | static const int8_t f_center_34[] = { |
120 | 2, 6, 10, 14, 18, 22, 26, 30, |
121 | 34,-10, -6, -2, 51, 57, 15, 21, |
122 | 27, 33, 39, 45, 54, 66, 78, 42, |
123 | 102, 66, 78, 90,102,114,126, 90, |
124 | }; |
125 | static const float fractional_delay_links[] = { 0.43f, 0.75f, 0.347f }; |
126 | const float fractional_delay_gain = 0.39f; |
127 | |
128 | for (pd0 = 0; pd0 < 8; pd0++) { |
129 | float pd0_re = ipdopd_cos[pd0]; |
130 | float pd0_im = ipdopd_sin[pd0]; |
131 | for (pd1 = 0; pd1 < 8; pd1++) { |
132 | float pd1_re = ipdopd_cos[pd1]; |
133 | float pd1_im = ipdopd_sin[pd1]; |
134 | for (pd2 = 0; pd2 < 8; pd2++) { |
135 | float pd2_re = ipdopd_cos[pd2]; |
136 | float pd2_im = ipdopd_sin[pd2]; |
137 | float re_smooth = 0.25f * pd0_re + 0.5f * pd1_re + pd2_re; |
138 | float im_smooth = 0.25f * pd0_im + 0.5f * pd1_im + pd2_im; |
139 | float pd_mag = 1 / hypot(im_smooth, re_smooth); |
140 | pd_re_smooth[pd0*64+pd1*8+pd2] = re_smooth * pd_mag; |
141 | pd_im_smooth[pd0*64+pd1*8+pd2] = im_smooth * pd_mag; |
142 | } |
143 | } |
144 | } |
145 | |
146 | for (iid = 0; iid < 46; iid++) { |
147 | float c = iid_par_dequant[iid]; ///< Linear Inter-channel Intensity Difference |
148 | float c1 = (float)M_SQRT2 / sqrtf(1.0f + c*c); |
149 | float c2 = c * c1; |
150 | for (icc = 0; icc < 8; icc++) { |
151 | /*if (PS_BASELINE || ps->icc_mode < 3)*/ { |
152 | float alpha = 0.5f * acos_icc_invq[icc]; |
153 | float beta = alpha * (c1 - c2) * (float)M_SQRT1_2; |
154 | HA[iid][icc][0] = c2 * cosf(beta + alpha); |
155 | HA[iid][icc][1] = c1 * cosf(beta - alpha); |
156 | HA[iid][icc][2] = c2 * sinf(beta + alpha); |
157 | HA[iid][icc][3] = c1 * sinf(beta - alpha); |
158 | } /* else */ { |
159 | float alpha, gamma, mu, rho; |
160 | float alpha_c, alpha_s, gamma_c, gamma_s; |
161 | rho = FFMAX(icc_invq[icc], 0.05f); |
162 | alpha = 0.5f * atan2f(2.0f * c * rho, c*c - 1.0f); |
163 | mu = c + 1.0f / c; |
164 | mu = sqrtf(1 + (4 * rho * rho - 4)/(mu * mu)); |
165 | gamma = atanf(sqrtf((1.0f - mu)/(1.0f + mu))); |
166 | if (alpha < 0) alpha += M_PI/2; |
167 | alpha_c = cosf(alpha); |
168 | alpha_s = sinf(alpha); |
169 | gamma_c = cosf(gamma); |
170 | gamma_s = sinf(gamma); |
171 | HB[iid][icc][0] = M_SQRT2 * alpha_c * gamma_c; |
172 | HB[iid][icc][1] = M_SQRT2 * alpha_s * gamma_c; |
173 | HB[iid][icc][2] = -M_SQRT2 * alpha_s * gamma_s; |
174 | HB[iid][icc][3] = M_SQRT2 * alpha_c * gamma_s; |
175 | } |
176 | } |
177 | } |
178 | |
179 | for (k = 0; k < NR_ALLPASS_BANDS20; k++) { |
180 | double f_center, theta; |
181 | if (k < FF_ARRAY_ELEMS(f_center_20)) |
182 | f_center = f_center_20[k] * 0.125; |
183 | else |
184 | f_center = k - 6.5f; |
185 | for (m = 0; m < PS_AP_LINKS; m++) { |
186 | theta = -M_PI * fractional_delay_links[m] * f_center; |
187 | Q_fract_allpass[0][k][m][0] = cos(theta); |
188 | Q_fract_allpass[0][k][m][1] = sin(theta); |
189 | } |
190 | theta = -M_PI*fractional_delay_gain*f_center; |
191 | phi_fract[0][k][0] = cos(theta); |
192 | phi_fract[0][k][1] = sin(theta); |
193 | } |
194 | for (k = 0; k < NR_ALLPASS_BANDS34; k++) { |
195 | double f_center, theta; |
196 | if (k < FF_ARRAY_ELEMS(f_center_34)) |
197 | f_center = f_center_34[k] / 24.0; |
198 | else |
199 | f_center = k - 26.5f; |
200 | for (m = 0; m < PS_AP_LINKS; m++) { |
201 | theta = -M_PI * fractional_delay_links[m] * f_center; |
202 | Q_fract_allpass[1][k][m][0] = cos(theta); |
203 | Q_fract_allpass[1][k][m][1] = sin(theta); |
204 | } |
205 | theta = -M_PI*fractional_delay_gain*f_center; |
206 | phi_fract[1][k][0] = cos(theta); |
207 | phi_fract[1][k][1] = sin(theta); |
208 | } |
209 | |
210 | make_filters_from_proto(f20_0_8, g0_Q8, 8); |
211 | make_filters_from_proto(f34_0_12, g0_Q12, 12); |
212 | make_filters_from_proto(f34_1_8, g1_Q8, 8); |
213 | make_filters_from_proto(f34_2_4, g2_Q4, 4); |
214 | } |
215 | #endif /* CONFIG_HARDCODED_TABLES */ |
216 | |
217 | #endif /* AVCODEC_AACPS_TABLEGEN_H */ |
218 |