215 lines
7.1 KiB
C
215 lines
7.1 KiB
C
/*
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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)[8][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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if (ARCH_ARM)
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ff_psdsp_init_arm(s);
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}
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