func: av_cold void ff_dct_init_x86(DCTContext *s)
  
  {
  
      int cpu_flags = av_get_cpu_flags();
  
  
  
      if (EXTERNAL_SSE(cpu_flags))
  
          s->dct32 = ff_dct32_float_sse;
  
      if (EXTERNAL_SSE2(cpu_flags))
  
          s->dct32 = ff_dct32_float_sse2;
  
      if (EXTERNAL_AVX(cpu_flags))
  
          s->dct32 = ff_dct32_float_avx;
  
  }
  