iir_filter        384 libavcodec/aacpsy.c static float iir_filter(int in, float state[2])
iir_filter        517 libavcodec/g723_1dec.c #define iir_filter(fir_coef, iir_coef, src, dest, width)\
iir_filter        367 libavcodec/g723_1enc.c static void iir_filter(int16_t *fir_coef, int16_t *iir_coef,