| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * This file is part of FFmpeg. | ||
| 3 | * | ||
| 4 | * FFmpeg is free software; you can redistribute it and/or | ||
| 5 | * modify it under the terms of the GNU Lesser General Public | ||
| 6 | * License as published by the Free Software Foundation; either | ||
| 7 | * version 2.1 of the License, or (at your option) any later version. | ||
| 8 | * | ||
| 9 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 12 | * Lesser General Public License for more details. | ||
| 13 | * | ||
| 14 | * You should have received a copy of the GNU Lesser General Public | ||
| 15 | * License along with FFmpeg; if not, write to the Free Software | ||
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 17 | */ | ||
| 18 | |||
| 19 | #include "config.h" | ||
| 20 | #include "libavutil/attributes.h" | ||
| 21 | #include "libavutil/mem_internal.h" | ||
| 22 | #include "dsp.h" | ||
| 23 | |||
| 24 | 10398 | static void postfilter_c(float *data, int period, float *gains, int len) | |
| 25 | { | ||
| 26 | 10398 | const float g0 = gains[0]; | |
| 27 | 10398 | const float g1 = gains[1]; | |
| 28 | 10398 | const float g2 = gains[2]; | |
| 29 | |||
| 30 | 10398 | float x4 = data[-period - 2]; | |
| 31 | 10398 | float x3 = data[-period - 1]; | |
| 32 | 10398 | float x2 = data[-period + 0]; | |
| 33 | 10398 | float x1 = data[-period + 1]; | |
| 34 | |||
| 35 |
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5937918 | for (int i = 0; i < len; i++) { |
| 36 | 5927520 | float x0 = data[i - period + 2]; | |
| 37 | 5927520 | data[i] += g0 * x2 + | |
| 38 | 5927520 | g1 * (x1 + x3) + | |
| 39 | 5927520 | g2 * (x0 + x4); | |
| 40 | 5927520 | x4 = x3; | |
| 41 | 5927520 | x3 = x2; | |
| 42 | 5927520 | x2 = x1; | |
| 43 | 5927520 | x1 = x0; | |
| 44 | } | ||
| 45 | 10398 | } | |
| 46 | |||
| 47 | 57236 | static float deemphasis_c(float *y, float *x, float coeff, const float *weights, int len) | |
| 48 | { | ||
| 49 | 57236 | const float c = weights[0]; | |
| 50 |
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23424356 | for (int i = 0; i < len; i++) |
| 51 | 23367120 | coeff = y[i] = x[i] + coeff*c; | |
| 52 | |||
| 53 | 57236 | return coeff; | |
| 54 | } | ||
| 55 | |||
| 56 | 153 | av_cold void ff_opus_dsp_init(OpusDSP *ctx) | |
| 57 | { | ||
| 58 | 153 | ctx->postfilter = postfilter_c; | |
| 59 | 153 | ctx->deemphasis = deemphasis_c; | |
| 60 | |||
| 61 | #if ARCH_AARCH64 | ||
| 62 | ff_opus_dsp_init_aarch64(ctx); | ||
| 63 | #elif ARCH_RISCV | ||
| 64 | ff_opus_dsp_init_riscv(ctx); | ||
| 65 | #elif ARCH_X86 && HAVE_X86ASM | ||
| 66 | 153 | ff_opus_dsp_init_x86(ctx); | |
| 67 | #endif | ||
| 68 | 153 | } | |
| 69 |