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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 <stddef.h>
  20.  
  21. #include "libavutil/cpu.h"
  22. #include "libavutil/aarch64/cpu.h"
  23. #include "libavutil/internal.h"
  24.  
  25. #include "libavcodec/imdct15.h"
  26.  
  27. #include "asm-offsets.h"
  28.  
  29. AV_CHECK_OFFSET(IMDCT15Context, exptab,         CELT_EXPTAB);
  30. AV_CHECK_OFFSET(IMDCT15Context, fft_n,          CELT_FFT_N);
  31. AV_CHECK_OFFSET(IMDCT15Context, len2,           CELT_LEN2);
  32. AV_CHECK_OFFSET(IMDCT15Context, len4,           CELT_LEN4);
  33. AV_CHECK_OFFSET(IMDCT15Context, tmp,            CELT_TMP);
  34. AV_CHECK_OFFSET(IMDCT15Context, twiddle_exptab, CELT_TWIDDLE);
  35.  
  36. void ff_celt_imdct_half_neon(IMDCT15Context *s, float *dst, const float *src,
  37.                              ptrdiff_t stride, float scale);
  38.  
  39. void ff_imdct15_init_aarch64(IMDCT15Context *s)
  40. {
  41.     int cpu_flags = av_get_cpu_flags();
  42.  
  43.     if (have_neon(cpu_flags)) {
  44.         s->imdct_half = ff_celt_imdct_half_neon;
  45.     }
  46. }
  47.