Lines Matching refs:nbits
40 const int n = 1 << s->nbits;
89 av_cold int ff_rdft_init(RDFTContext *s, int nbits, enum RDFTransformType trans)
91 int n = 1 << nbits;
94 s->nbits = nbits;
99 if (nbits < 4 || nbits > 16)
102 if ((ret = ff_fft_init(&s->fft, nbits-1, trans == IDFT_C2R || trans == IDFT_R2C)) < 0)
105 ff_init_ff_cos_tabs(nbits);
106 s->tcos = ff_cos_tabs[nbits];
107 s->tsin = ff_cos_tabs[nbits] + (n >> 2);