yading@10: /* yading@10: * Header file for hardcoded Parametric Stereo tables yading@10: * yading@10: * Copyright (c) 2010 Alex Converse yading@10: * yading@10: * This file is part of FFmpeg. yading@10: * yading@10: * FFmpeg is free software; you can redistribute it and/or yading@10: * modify it under the terms of the GNU Lesser General Public yading@10: * License as published by the Free Software Foundation; either yading@10: * version 2.1 of the License, or (at your option) any later version. yading@10: * yading@10: * FFmpeg is distributed in the hope that it will be useful, yading@10: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@10: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU yading@10: * Lesser General Public License for more details. yading@10: * yading@10: * You should have received a copy of the GNU Lesser General Public yading@10: * License along with FFmpeg; if not, write to the Free Software yading@10: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@10: */ yading@10: yading@10: #ifndef AACPS_TABLEGEN_H yading@10: #define AACPS_TABLEGEN_H yading@10: yading@10: #include yading@10: #include yading@10: yading@10: #if CONFIG_HARDCODED_TABLES yading@10: #define ps_tableinit() yading@10: #include "libavcodec/aacps_tables.h" yading@10: #else yading@10: #include "libavutil/common.h" yading@10: #include "libavutil/libm.h" yading@10: #include "libavutil/mathematics.h" yading@10: #include "libavutil/mem.h" yading@10: #define NR_ALLPASS_BANDS20 30 yading@10: #define NR_ALLPASS_BANDS34 50 yading@10: #define PS_AP_LINKS 3 yading@10: static float pd_re_smooth[8*8*8]; yading@10: static float pd_im_smooth[8*8*8]; yading@10: static float HA[46][8][4]; yading@10: static float HB[46][8][4]; yading@10: static DECLARE_ALIGNED(16, float, f20_0_8) [ 8][8][2]; yading@10: static DECLARE_ALIGNED(16, float, f34_0_12)[12][8][2]; yading@10: static DECLARE_ALIGNED(16, float, f34_1_8) [ 8][8][2]; yading@10: static DECLARE_ALIGNED(16, float, f34_2_4) [ 4][8][2]; yading@10: static DECLARE_ALIGNED(16, float, Q_fract_allpass)[2][50][3][2]; yading@10: static DECLARE_ALIGNED(16, float, phi_fract)[2][50][2]; yading@10: yading@10: static const float g0_Q8[] = { yading@10: 0.00746082949812f, 0.02270420949825f, 0.04546865930473f, 0.07266113929591f, yading@10: 0.09885108575264f, 0.11793710567217f, 0.125f yading@10: }; yading@10: yading@10: static const float g0_Q12[] = { yading@10: 0.04081179924692f, 0.03812810994926f, 0.05144908135699f, 0.06399831151592f, yading@10: 0.07428313801106f, 0.08100347892914f, 0.08333333333333f yading@10: }; yading@10: yading@10: static const float g1_Q8[] = { yading@10: 0.01565675600122f, 0.03752716391991f, 0.05417891378782f, 0.08417044116767f, yading@10: 0.10307344158036f, 0.12222452249753f, 0.125f yading@10: }; yading@10: yading@10: static const float g2_Q4[] = { yading@10: -0.05908211155639f, -0.04871498374946f, 0.0f, 0.07778723915851f, yading@10: 0.16486303567403f, 0.23279856662996f, 0.25f yading@10: }; yading@10: yading@10: static void make_filters_from_proto(float (*filter)[8][2], const float *proto, int bands) yading@10: { yading@10: int q, n; yading@10: for (q = 0; q < bands; q++) { yading@10: for (n = 0; n < 7; n++) { yading@10: double theta = 2 * M_PI * (q + 0.5) * (n - 6) / bands; yading@10: filter[q][n][0] = proto[n] * cos(theta); yading@10: filter[q][n][1] = proto[n] * -sin(theta); yading@10: } yading@10: } yading@10: } yading@10: yading@10: static void ps_tableinit(void) yading@10: { yading@10: static const float ipdopd_sin[] = { 0, M_SQRT1_2, 1, M_SQRT1_2, 0, -M_SQRT1_2, -1, -M_SQRT1_2 }; yading@10: static const float ipdopd_cos[] = { 1, M_SQRT1_2, 0, -M_SQRT1_2, -1, -M_SQRT1_2, 0, M_SQRT1_2 }; yading@10: int pd0, pd1, pd2; yading@10: yading@10: static const float iid_par_dequant[] = { yading@10: //iid_par_dequant_default yading@10: 0.05623413251903, 0.12589254117942, 0.19952623149689, 0.31622776601684, yading@10: 0.44668359215096, 0.63095734448019, 0.79432823472428, 1, yading@10: 1.25892541179417, 1.58489319246111, 2.23872113856834, 3.16227766016838, yading@10: 5.01187233627272, 7.94328234724282, 17.7827941003892, yading@10: //iid_par_dequant_fine yading@10: 0.00316227766017, 0.00562341325190, 0.01, 0.01778279410039, yading@10: 0.03162277660168, 0.05623413251903, 0.07943282347243, 0.11220184543020, yading@10: 0.15848931924611, 0.22387211385683, 0.31622776601684, 0.39810717055350, yading@10: 0.50118723362727, 0.63095734448019, 0.79432823472428, 1, yading@10: 1.25892541179417, 1.58489319246111, 1.99526231496888, 2.51188643150958, yading@10: 3.16227766016838, 4.46683592150963, 6.30957344480193, 8.91250938133745, yading@10: 12.5892541179417, 17.7827941003892, 31.6227766016838, 56.2341325190349, yading@10: 100, 177.827941003892, 316.227766016837, yading@10: }; yading@10: static const float icc_invq[] = { yading@10: 1, 0.937, 0.84118, 0.60092, 0.36764, 0, -0.589, -1 yading@10: }; yading@10: static const float acos_icc_invq[] = { yading@10: 0, 0.35685527, 0.57133466, 0.92614472, 1.1943263, M_PI/2, 2.2006171, M_PI yading@10: }; yading@10: int iid, icc; yading@10: yading@10: int k, m; yading@10: static const int8_t f_center_20[] = { yading@10: -3, -1, 1, 3, 5, 7, 10, 14, 18, 22, yading@10: }; yading@10: static const int8_t f_center_34[] = { yading@10: 2, 6, 10, 14, 18, 22, 26, 30, yading@10: 34,-10, -6, -2, 51, 57, 15, 21, yading@10: 27, 33, 39, 45, 54, 66, 78, 42, yading@10: 102, 66, 78, 90,102,114,126, 90, yading@10: }; yading@10: static const float fractional_delay_links[] = { 0.43f, 0.75f, 0.347f }; yading@10: const float fractional_delay_gain = 0.39f; yading@10: yading@10: for (pd0 = 0; pd0 < 8; pd0++) { yading@10: float pd0_re = ipdopd_cos[pd0]; yading@10: float pd0_im = ipdopd_sin[pd0]; yading@10: for (pd1 = 0; pd1 < 8; pd1++) { yading@10: float pd1_re = ipdopd_cos[pd1]; yading@10: float pd1_im = ipdopd_sin[pd1]; yading@10: for (pd2 = 0; pd2 < 8; pd2++) { yading@10: float pd2_re = ipdopd_cos[pd2]; yading@10: float pd2_im = ipdopd_sin[pd2]; yading@10: float re_smooth = 0.25f * pd0_re + 0.5f * pd1_re + pd2_re; yading@10: float im_smooth = 0.25f * pd0_im + 0.5f * pd1_im + pd2_im; yading@10: float pd_mag = 1 / sqrt(im_smooth * im_smooth + re_smooth * re_smooth); yading@10: pd_re_smooth[pd0*64+pd1*8+pd2] = re_smooth * pd_mag; yading@10: pd_im_smooth[pd0*64+pd1*8+pd2] = im_smooth * pd_mag; yading@10: } yading@10: } yading@10: } yading@10: yading@10: for (iid = 0; iid < 46; iid++) { yading@10: float c = iid_par_dequant[iid]; ///< Linear Inter-channel Intensity Difference yading@10: float c1 = (float)M_SQRT2 / sqrtf(1.0f + c*c); yading@10: float c2 = c * c1; yading@10: for (icc = 0; icc < 8; icc++) { yading@10: /*if (PS_BASELINE || ps->icc_mode < 3)*/ { yading@10: float alpha = 0.5f * acos_icc_invq[icc]; yading@10: float beta = alpha * (c1 - c2) * (float)M_SQRT1_2; yading@10: HA[iid][icc][0] = c2 * cosf(beta + alpha); yading@10: HA[iid][icc][1] = c1 * cosf(beta - alpha); yading@10: HA[iid][icc][2] = c2 * sinf(beta + alpha); yading@10: HA[iid][icc][3] = c1 * sinf(beta - alpha); yading@10: } /* else */ { yading@10: float alpha, gamma, mu, rho; yading@10: float alpha_c, alpha_s, gamma_c, gamma_s; yading@10: rho = FFMAX(icc_invq[icc], 0.05f); yading@10: alpha = 0.5f * atan2f(2.0f * c * rho, c*c - 1.0f); yading@10: mu = c + 1.0f / c; yading@10: mu = sqrtf(1 + (4 * rho * rho - 4)/(mu * mu)); yading@10: gamma = atanf(sqrtf((1.0f - mu)/(1.0f + mu))); yading@10: if (alpha < 0) alpha += M_PI/2; yading@10: alpha_c = cosf(alpha); yading@10: alpha_s = sinf(alpha); yading@10: gamma_c = cosf(gamma); yading@10: gamma_s = sinf(gamma); yading@10: HB[iid][icc][0] = M_SQRT2 * alpha_c * gamma_c; yading@10: HB[iid][icc][1] = M_SQRT2 * alpha_s * gamma_c; yading@10: HB[iid][icc][2] = -M_SQRT2 * alpha_s * gamma_s; yading@10: HB[iid][icc][3] = M_SQRT2 * alpha_c * gamma_s; yading@10: } yading@10: } yading@10: } yading@10: yading@10: for (k = 0; k < NR_ALLPASS_BANDS20; k++) { yading@10: double f_center, theta; yading@10: if (k < FF_ARRAY_ELEMS(f_center_20)) yading@10: f_center = f_center_20[k] * 0.125; yading@10: else yading@10: f_center = k - 6.5f; yading@10: for (m = 0; m < PS_AP_LINKS; m++) { yading@10: theta = -M_PI * fractional_delay_links[m] * f_center; yading@10: Q_fract_allpass[0][k][m][0] = cos(theta); yading@10: Q_fract_allpass[0][k][m][1] = sin(theta); yading@10: } yading@10: theta = -M_PI*fractional_delay_gain*f_center; yading@10: phi_fract[0][k][0] = cos(theta); yading@10: phi_fract[0][k][1] = sin(theta); yading@10: } yading@10: for (k = 0; k < NR_ALLPASS_BANDS34; k++) { yading@10: double f_center, theta; yading@10: if (k < FF_ARRAY_ELEMS(f_center_34)) yading@10: f_center = f_center_34[k] / 24.; yading@10: else yading@10: f_center = k - 26.5f; yading@10: for (m = 0; m < PS_AP_LINKS; m++) { yading@10: theta = -M_PI * fractional_delay_links[m] * f_center; yading@10: Q_fract_allpass[1][k][m][0] = cos(theta); yading@10: Q_fract_allpass[1][k][m][1] = sin(theta); yading@10: } yading@10: theta = -M_PI*fractional_delay_gain*f_center; yading@10: phi_fract[1][k][0] = cos(theta); yading@10: phi_fract[1][k][1] = sin(theta); yading@10: } yading@10: yading@10: make_filters_from_proto(f20_0_8, g0_Q8, 8); yading@10: make_filters_from_proto(f34_0_12, g0_Q12, 12); yading@10: make_filters_from_proto(f34_1_8, g1_Q8, 8); yading@10: make_filters_from_proto(f34_2_4, g2_Q4, 4); yading@10: } yading@10: #endif /* CONFIG_HARDCODED_TABLES */ yading@10: yading@10: #endif /* AACPS_TABLEGEN_H */