--- /dev/null
+/** \file imdct.h: Exported symbols from imdct.c. */
+
+struct mdct_context;
+
+float *ff_sine_windows[6];
+void sine_window_init(float *window, int n);
+int imdct_init(int nbits, int inverse, struct mdct_context **result);
+void imdct(struct mdct_context *s, float *output, const float *input);
+void imdct_end(struct mdct_context *s);