ffmpeg/libavcodec/x86/dct_init.c

   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/cpu.h"
  22 #include "libavutil/x86/cpu.h"
  23 #include "libavcodec/dct.h"
  24
  25 void ff_dct32_float_sse(FFTSample *out, const FFTSample *in);
  26 void ff_dct32_float_sse2(FFTSample *out, const FFTSample *in);
  27 void ff_dct32_float_avx(FFTSample *out, const FFTSample *in);
  28
  29 av_cold void ff_dct_init_x86(DCTContext *s)
  30 {
  31     int cpu_flags = av_get_cpu_flags();
  32
  33     if (ARCH_X86_32 && EXTERNAL_SSE(cpu_flags))
  34         s->dct32 = ff_dct32_float_sse;
  35     if (EXTERNAL_SSE2(cpu_flags))
  36         s->dct32 = ff_dct32_float_sse2;
  37     if (EXTERNAL_AVX(cpu_flags))
  38         s->dct32 = ff_dct32_float_avx;
  39 }