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; }