| 1 | /* |
| 2 | * Copyright (c) 2009 Mans Rullgard <mans@mansr.com> |
| 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 "libavutil/arm/cpu.h" |
| 22 | |
| 23 | #define FFT_FLOAT 0 |
| 24 | #include "libavcodec/fft.h" |
| 25 | |
| 26 | void ff_fft_fixed_calc_neon(FFTContext *s, FFTComplex *z); |
| 27 | void ff_mdct_fixed_calc_neon(FFTContext *s, FFTSample *o, const FFTSample *i); |
| 28 | void ff_mdct_fixed_calcw_neon(FFTContext *s, FFTDouble *o, const FFTSample *i); |
| 29 | |
| 30 | av_cold void ff_fft_fixed_init_arm(FFTContext *s) |
| 31 | { |
| 32 | int cpu_flags = av_get_cpu_flags(); |
| 33 | |
| 34 | if (have_neon(cpu_flags)) { |
| 35 | s->fft_permutation = FF_FFT_PERM_SWAP_LSBS; |
| 36 | #if CONFIG_FFT |
| 37 | s->fft_calc = ff_fft_fixed_calc_neon; |
| 38 | #endif |
| 39 | |
| 40 | #if CONFIG_MDCT |
| 41 | if (!s->inverse && s->nbits >= 3) { |
| 42 | s->mdct_permutation = FF_MDCT_PERM_INTERLEAVE; |
| 43 | s->mdct_calc = ff_mdct_fixed_calc_neon; |
| 44 | s->mdct_calcw = ff_mdct_fixed_calcw_neon; |
| 45 | } |
| 46 | #endif |
| 47 | } |
| 48 | } |