av_cold void ff_fft_fixed_init_arm(FFTContext *s) { int cpu_flags = av_get_cpu_flags(); if (have_neon(cpu_flags)) { s->fft_permutation = FF_FFT_PERM_SWAP_LSBS; s->fft_calc = ff_fft_fixed_calc_neon; #if CONFIG_MDCT if (!s->inverse && s->mdct_bits >= 5) { s->mdct_permutation = FF_MDCT_PERM_INTERLEAVE; s->mdct_calc = ff_mdct_fixed_calc_neon; s->mdct_calcw = ff_mdct_fixed_calcw_neon; } #endif } }