void (*mdct_calcw)(struct FFTContext *s, FFTDouble *output, const FFTSample *input);
enum fft_permutation_type fft_permutation;
enum mdct_permutation_type mdct_permutation;
void (*mdct_calcw)(struct FFTContext *s, FFTDouble *output, const FFTSample *input);
enum fft_permutation_type fft_permutation;
enum mdct_permutation_type mdct_permutation;