static void fft_calc(IMDCT15Context *s, FFTComplex *out, const FFTComplex *in, int N, ptrdiff_t stride)
void(* mdct_calcw)(struct FFTContext *s, FFTDouble *output, const FFTSample *input)
void(* mdct_calc)(struct FFTContext *s, FFTSample *output, const FFTSample *input)
void(* imdct_calc)(struct FFTContext *s, FFTSample *output, const FFTSample *input)
enum fft_permutation_type fft_permutation
void(* imdct_half)(struct FFTContext *s, FFTSample *output, const FFTSample *input)
enum mdct_permutation_type mdct_permutation