2 * Copyright (c) 2015 Peter Meerwald <pmeerw@pmeerw.net>
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 * quadrature mirror filter (QMF) coefficients (ITU-T G.722 Table 11) inlined
26 * in code below: 3, -11, 12, 32, -210, 951, 3876, -805, 362, -156, 53, -11
29 static void g722_apply_qmf(const int16_t *prev_samples, int xout[2])
31 xout[1] = MUL16(*prev_samples++, 3);
32 xout[0] = MUL16(*prev_samples++, -11);
34 MAC16(xout[1], *prev_samples++, -11);
35 MAC16(xout[0], *prev_samples++, 53);
37 MAC16(xout[1], *prev_samples++, 12);
38 MAC16(xout[0], *prev_samples++, -156);
40 MAC16(xout[1], *prev_samples++, 32);
41 MAC16(xout[0], *prev_samples++, 362);
43 MAC16(xout[1], *prev_samples++, -210);
44 MAC16(xout[0], *prev_samples++, -805);
46 MAC16(xout[1], *prev_samples++, 951);
47 MAC16(xout[0], *prev_samples++, 3876);
49 MAC16(xout[1], *prev_samples++, 3876);
50 MAC16(xout[0], *prev_samples++, 951);
52 MAC16(xout[1], *prev_samples++, -805);
53 MAC16(xout[0], *prev_samples++, -210);
55 MAC16(xout[1], *prev_samples++, 362);
56 MAC16(xout[0], *prev_samples++, 32);
58 MAC16(xout[1], *prev_samples++, -156);
59 MAC16(xout[0], *prev_samples++, 12);
61 MAC16(xout[1], *prev_samples++, 53);
62 MAC16(xout[0], *prev_samples++, -11);
64 MAC16(xout[1], *prev_samples++, -11);
65 MAC16(xout[0], *prev_samples++, 3);
68 av_cold void ff_g722dsp_init(G722DSPContext *c)
70 c->apply_qmf = g722_apply_qmf;
73 ff_g722dsp_init_arm(c);
75 ff_g722dsp_init_x86(c);