blob: f1480536d075ddd3e6b1e1db4d46a28186698ab8
| 1 | /* |
| 2 | * Copyright (c) 2015 Peter Meerwald <pmeerw@pmeerw.net> |
| 3 | * |
| 4 | * This file is part of FFmpeg. |
| 5 | * |
| 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. |
| 10 | * |
| 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. |
| 15 | * |
| 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 |
| 19 | */ |
| 20 | |
| 21 | #include "g722dsp.h" |
| 22 | #include "mathops.h" |
| 23 | |
| 24 | /* |
| 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 |
| 27 | */ |
| 28 | |
| 29 | static void g722_apply_qmf(const int16_t *prev_samples, int xout[2]) |
| 30 | { |
| 31 | xout[1] = MUL16(*prev_samples++, 3); |
| 32 | xout[0] = MUL16(*prev_samples++, -11); |
| 33 | |
| 34 | MAC16(xout[1], *prev_samples++, -11); |
| 35 | MAC16(xout[0], *prev_samples++, 53); |
| 36 | |
| 37 | MAC16(xout[1], *prev_samples++, 12); |
| 38 | MAC16(xout[0], *prev_samples++, -156); |
| 39 | |
| 40 | MAC16(xout[1], *prev_samples++, 32); |
| 41 | MAC16(xout[0], *prev_samples++, 362); |
| 42 | |
| 43 | MAC16(xout[1], *prev_samples++, -210); |
| 44 | MAC16(xout[0], *prev_samples++, -805); |
| 45 | |
| 46 | MAC16(xout[1], *prev_samples++, 951); |
| 47 | MAC16(xout[0], *prev_samples++, 3876); |
| 48 | |
| 49 | MAC16(xout[1], *prev_samples++, 3876); |
| 50 | MAC16(xout[0], *prev_samples++, 951); |
| 51 | |
| 52 | MAC16(xout[1], *prev_samples++, -805); |
| 53 | MAC16(xout[0], *prev_samples++, -210); |
| 54 | |
| 55 | MAC16(xout[1], *prev_samples++, 362); |
| 56 | MAC16(xout[0], *prev_samples++, 32); |
| 57 | |
| 58 | MAC16(xout[1], *prev_samples++, -156); |
| 59 | MAC16(xout[0], *prev_samples++, 12); |
| 60 | |
| 61 | MAC16(xout[1], *prev_samples++, 53); |
| 62 | MAC16(xout[0], *prev_samples++, -11); |
| 63 | |
| 64 | MAC16(xout[1], *prev_samples++, -11); |
| 65 | MAC16(xout[0], *prev_samples++, 3); |
| 66 | } |
| 67 | |
| 68 | av_cold void ff_g722dsp_init(G722DSPContext *c) |
| 69 | { |
| 70 | c->apply_qmf = g722_apply_qmf; |
| 71 | |
| 72 | if (ARCH_ARM) |
| 73 | ff_g722dsp_init_arm(c); |
| 74 | if (ARCH_X86) |
| 75 | ff_g722dsp_init_x86(c); |
| 76 | } |
| 77 |