ff_imdct_half_c   762 libavcodec/dsputil.h void ff_imdct_half_c(MDCTContext *s, FFTSample *output, const FFTSample *input);
ff_imdct_half_c    87 libavcodec/fft.c     s->imdct_half  = ff_imdct_half_c;
ff_imdct_half_c   169 libavcodec/mdct.c     ff_imdct_half_c(s, output+n4, input);