/* * Copyright (c) 2015 Peter Meerwald <pmeerw@pmeerw.net> * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "g722dsp.h" #include "mathops.h" /* * quadrature mirror filter (QMF) coefficients (ITU-T G.722 Table 11) inlined * in code below: 3, -11, 12, 32, -210, 951, 3876, -805, 362, -156, 53, -11 */ static void g722_apply_qmf(const int16_t *prev_samples, int xout[2]) { xout[1] = MUL16(*prev_samples++, 3); xout[0] = MUL16(*prev_samples++, -11); MAC16(xout[1], *prev_samples++, -11); MAC16(xout[0], *prev_samples++, 53); MAC16(xout[1], *prev_samples++, 12); MAC16(xout[0], *prev_samples++, -156); MAC16(xout[1], *prev_samples++, 32); MAC16(xout[0], *prev_samples++, 362); MAC16(xout[1], *prev_samples++, -210); MAC16(xout[0], *prev_samples++, -805); MAC16(xout[1], *prev_samples++, 951); MAC16(xout[0], *prev_samples++, 3876); MAC16(xout[1], *prev_samples++, 3876); MAC16(xout[0], *prev_samples++, 951); MAC16(xout[1], *prev_samples++, -805); MAC16(xout[0], *prev_samples++, -210); MAC16(xout[1], *prev_samples++, 362); MAC16(xout[0], *prev_samples++, 32); MAC16(xout[1], *prev_samples++, -156); MAC16(xout[0], *prev_samples++, 12); MAC16(xout[1], *prev_samples++, 53); MAC16(xout[0], *prev_samples++, -11); MAC16(xout[1], *prev_samples++, -11); MAC16(xout[0], *prev_samples++, 3); } av_cold void ff_g722dsp_init(G722DSPContext *c) { c->apply_qmf = g722_apply_qmf; if (ARCH_ARM) ff_g722dsp_init_arm(c); if (ARCH_X86) ff_g722dsp_init_x86(c); }