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  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 "libavutil/attributes.h"
  20. #include "libavutil/cpu.h"
  21. #include "libavutil/aarch64/cpu.h"
  22. #include "libavcodec/videodsp.h"
  23.  
  24. void ff_prefetch_aarch64(uint8_t *mem, ptrdiff_t stride, int h);
  25.  
  26. av_cold void ff_videodsp_init_aarch64(VideoDSPContext *ctx, int bpc)
  27. {
  28.     int cpu_flags = av_get_cpu_flags();
  29.  
  30.     if (have_armv8(cpu_flags))
  31.         ctx->prefetch = ff_prefetch_aarch64;
  32. }
  33.