mirror of https://github.com/FFmpeg/FFmpeg.git
Signed-off-by: Mans Rullgard <mans@mansr.com>pull/30/merge
Mans Rullgard
13 years ago
parent
2ed503af9f
commit
bf1945af30
5 changed files with 331 additions and 161 deletions
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/*
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* Copyright (c) 2010 Alex Converse <alex.converse@gmail.com> |
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* |
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* This file is part of Libav. |
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* |
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* Libav is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* Libav is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with Libav; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "config.h" |
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#include "libavutil/attributes.h" |
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#include "aacpsdsp.h" |
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static void ps_add_squares_c(float *dst, const float (*src)[2], int n) |
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{ |
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int i; |
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for (i = 0; i < n; i++) |
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dst[i] += src[i][0] * src[i][0] + src[i][1] * src[i][1]; |
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} |
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static void ps_mul_pair_single_c(float (*dst)[2], float (*src0)[2], float *src1, |
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int n) |
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{ |
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int i; |
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for (i = 0; i < n; i++) { |
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dst[i][0] = src0[i][0] * src1[i]; |
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dst[i][1] = src0[i][1] * src1[i]; |
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} |
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} |
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static void ps_hybrid_analysis_c(float (*out)[2], float (*in)[2], |
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const float (*filter)[7][2], |
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int stride, int n) |
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{ |
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int i, j; |
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for (i = 0; i < n; i++) { |
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float sum_re = filter[i][6][0] * in[6][0]; |
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float sum_im = filter[i][6][0] * in[6][1]; |
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for (j = 0; j < 6; j++) { |
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float in0_re = in[j][0]; |
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float in0_im = in[j][1]; |
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float in1_re = in[12-j][0]; |
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float in1_im = in[12-j][1]; |
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sum_re += filter[i][j][0] * (in0_re + in1_re) - |
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filter[i][j][1] * (in0_im - in1_im); |
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sum_im += filter[i][j][0] * (in0_im + in1_im) + |
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filter[i][j][1] * (in0_re - in1_re); |
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} |
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out[i * stride][0] = sum_re; |
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out[i * stride][1] = sum_im; |
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} |
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} |
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static void ps_hybrid_analysis_ileave_c(float (*out)[32][2], float L[2][38][64], |
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int i, int len) |
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{ |
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int j; |
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for (; i < 64; i++) { |
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for (j = 0; j < len; j++) { |
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out[i][j][0] = L[0][j][i]; |
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out[i][j][1] = L[1][j][i]; |
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} |
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} |
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} |
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static void ps_hybrid_synthesis_deint_c(float out[2][38][64], |
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float (*in)[32][2], |
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int i, int len) |
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{ |
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int n; |
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for (; i < 64; i++) { |
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for (n = 0; n < len; n++) { |
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out[0][n][i] = in[i][n][0]; |
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out[1][n][i] = in[i][n][1]; |
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} |
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} |
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} |
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static void ps_decorrelate_c(float (*out)[2], float (*delay)[2], |
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float (*ap_delay)[PS_QMF_TIME_SLOTS + PS_MAX_AP_DELAY][2], |
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const float phi_fract[2], float (*Q_fract)[2], |
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const float *transient_gain, |
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float g_decay_slope, |
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int len) |
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{ |
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static const float a[] = { 0.65143905753106f, |
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0.56471812200776f, |
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0.48954165955695f }; |
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float ag[PS_AP_LINKS]; |
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int m, n; |
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for (m = 0; m < PS_AP_LINKS; m++) |
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ag[m] = a[m] * g_decay_slope; |
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for (n = 0; n < len; n++) { |
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float in_re = delay[n][0] * phi_fract[0] - delay[n][1] * phi_fract[1]; |
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float in_im = delay[n][0] * phi_fract[1] + delay[n][1] * phi_fract[0]; |
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for (m = 0; m < PS_AP_LINKS; m++) { |
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float a_re = ag[m] * in_re; |
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float a_im = ag[m] * in_im; |
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float link_delay_re = ap_delay[m][n+2-m][0]; |
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float link_delay_im = ap_delay[m][n+2-m][1]; |
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float fractional_delay_re = Q_fract[m][0]; |
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float fractional_delay_im = Q_fract[m][1]; |
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float apd_re = in_re; |
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float apd_im = in_im; |
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in_re = link_delay_re * fractional_delay_re - |
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link_delay_im * fractional_delay_im - a_re; |
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in_im = link_delay_re * fractional_delay_im + |
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link_delay_im * fractional_delay_re - a_im; |
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ap_delay[m][n+5][0] = apd_re + ag[m] * in_re; |
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ap_delay[m][n+5][1] = apd_im + ag[m] * in_im; |
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} |
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out[n][0] = transient_gain[n] * in_re; |
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out[n][1] = transient_gain[n] * in_im; |
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} |
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} |
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static void ps_stereo_interpolate_c(float (*l)[2], float (*r)[2], |
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float h[2][4], float h_step[2][4], |
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int len) |
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{ |
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float h0 = h[0][0]; |
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float h1 = h[0][1]; |
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float h2 = h[0][2]; |
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float h3 = h[0][3]; |
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float hs0 = h_step[0][0]; |
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float hs1 = h_step[0][1]; |
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float hs2 = h_step[0][2]; |
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float hs3 = h_step[0][3]; |
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int n; |
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for (n = 0; n < len; n++) { |
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//l is s, r is d
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float l_re = l[n][0]; |
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float l_im = l[n][1]; |
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float r_re = r[n][0]; |
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float r_im = r[n][1]; |
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h0 += hs0; |
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h1 += hs1; |
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h2 += hs2; |
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h3 += hs3; |
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l[n][0] = h0 * l_re + h2 * r_re; |
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l[n][1] = h0 * l_im + h2 * r_im; |
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r[n][0] = h1 * l_re + h3 * r_re; |
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r[n][1] = h1 * l_im + h3 * r_im; |
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} |
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} |
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static void ps_stereo_interpolate_ipdopd_c(float (*l)[2], float (*r)[2], |
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float h[2][4], float h_step[2][4], |
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int len) |
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{ |
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float h00 = h[0][0], h10 = h[1][0]; |
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float h01 = h[0][1], h11 = h[1][1]; |
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float h02 = h[0][2], h12 = h[1][2]; |
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float h03 = h[0][3], h13 = h[1][3]; |
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float hs00 = h_step[0][0], hs10 = h_step[1][0]; |
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float hs01 = h_step[0][1], hs11 = h_step[1][1]; |
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float hs02 = h_step[0][2], hs12 = h_step[1][2]; |
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float hs03 = h_step[0][3], hs13 = h_step[1][3]; |
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int n; |
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for (n = 0; n < len; n++) { |
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//l is s, r is d
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float l_re = l[n][0]; |
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float l_im = l[n][1]; |
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float r_re = r[n][0]; |
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float r_im = r[n][1]; |
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h00 += hs00; |
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h01 += hs01; |
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h02 += hs02; |
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h03 += hs03; |
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h10 += hs10; |
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h11 += hs11; |
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h12 += hs12; |
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h13 += hs13; |
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l[n][0] = h00 * l_re + h02 * r_re - h10 * l_im - h12 * r_im; |
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l[n][1] = h00 * l_im + h02 * r_im + h10 * l_re + h12 * r_re; |
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r[n][0] = h01 * l_re + h03 * r_re - h11 * l_im - h13 * r_im; |
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r[n][1] = h01 * l_im + h03 * r_im + h11 * l_re + h13 * r_re; |
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} |
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} |
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av_cold void ff_psdsp_init(PSDSPContext *s) |
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{ |
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s->add_squares = ps_add_squares_c; |
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s->mul_pair_single = ps_mul_pair_single_c; |
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s->hybrid_analysis = ps_hybrid_analysis_c; |
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s->hybrid_analysis_ileave = ps_hybrid_analysis_ileave_c; |
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s->hybrid_synthesis_deint = ps_hybrid_synthesis_deint_c; |
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s->decorrelate = ps_decorrelate_c; |
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s->stereo_interpolate[0] = ps_stereo_interpolate_c; |
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s->stereo_interpolate[1] = ps_stereo_interpolate_ipdopd_c; |
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} |
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@ -0,0 +1,52 @@ |
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/*
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* Copyright (c) 2012 Mans Rullgard |
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* |
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* This file is part of Libav. |
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* |
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* Libav is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* Libav is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with Libav; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#ifndef LIBAVCODEC_AACPSDSP_H |
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#define LIBAVCODEC_AACPSDSP_H |
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#define PS_QMF_TIME_SLOTS 32 |
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#define PS_AP_LINKS 3 |
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#define PS_MAX_AP_DELAY 5 |
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typedef struct PSDSPContext { |
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void (*add_squares)(float *dst, const float (*src)[2], int n); |
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void (*mul_pair_single)(float (*dst)[2], float (*src0)[2], float *src1, |
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int n); |
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void (*hybrid_analysis)(float (*out)[2], float (*in)[2], |
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const float (*filter)[7][2], |
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int stride, int n); |
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void (*hybrid_analysis_ileave)(float (*out)[32][2], float L[2][38][64], |
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int i, int len); |
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void (*hybrid_synthesis_deint)(float out[2][38][64], float (*in)[32][2], |
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int i, int len); |
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void (*decorrelate)(float (*out)[2], float (*delay)[2], |
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float (*ap_delay)[PS_QMF_TIME_SLOTS+PS_MAX_AP_DELAY][2], |
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const float phi_fract[2], float (*Q_fract)[2], |
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const float *transient_gain, |
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float g_decay_slope, |
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int len); |
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void (*stereo_interpolate[2])(float (*l)[2], float (*r)[2], |
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float h[2][4], float h_step[2][4], |
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int len); |
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} PSDSPContext; |
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void ff_psdsp_init(PSDSPContext *s); |
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#endif /* LIBAVCODEC_AACPSDSP_H */ |
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