+/**
+ * Perform IIR filtering on floating-point input samples.
+ *
+ * @param coeffs pointer to filter coefficients
+ * @param state pointer to filter state
+ * @param size input length
+ * @param src source samples
+ * @param sstep source stride
+ * @param dst filtered samples (destination may be the same as input)
+ * @param dstep destination stride
+ */
+void ff_iir_filter_flt(const struct FFIIRFilterCoeffs *coeffs,
+ struct FFIIRFilterState *state, int size,
+ const float *src, int sstep, float *dst, int dstep);
+