mips: Optimization of IIR filter function

Signed-off-by: Bojan Zivkovic <bojan@mips.com>
Reviewed-by: Nedeljko Babic <Nedeljko.Babic@imgtec.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 23 insertions, 0 deletions

diff --git a/libavcodec/iirfilter.h b/libavcodec/iirfilter.h
index b29e035811..4ea6642215 100644
--- a/libavcodec/iirfilter.h
+++ b/libavcodec/iirfilter.h
@@ -47,6 +47,29 @@ enum IIRFilterMode{
     FF_FILTER_MODE_BANDSTOP,
 };
 
+typedef struct FFIIRFilterContext {
+    /**
+    * 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 (*filter_flt)(const struct FFIIRFilterCoeffs *coeffs,
+                        struct FFIIRFilterState *state, int size,
+                        const float *src, int sstep, float *dst, int dstep);
+} FFIIRFilterContext;
+
+/**
+ * Initialize FFIIRFilterContext
+ */
+void ff_iir_filter_init(FFIIRFilterContext *f);
+void ff_iir_filter_init_mips(FFIIRFilterContext *f);
+
 /**
  * Initialize filter coefficients.
  *