avutil: add float_dsp.vector_dmul

libavutil/float_dsp.c

@@ -32,6 +32,14 @@ static void vector_fmul_c(float *dst, const float *src0, const float *src1,
         dst[i] = src0[i] * src1[i];
 }
 
+static void vector_dmul_c(double *dst, const double *src0, const double *src1,
+                          int len)
+{
+    int i;
+    for (i = 0; i < len; i++)
+        dst[i] = src0[i] * src1[i];
+}
+
 static void vector_fmac_scalar_c(float *dst, const float *src, float mul,
                                  int len)
 {
@@ -131,6 +139,7 @@ av_cold AVFloatDSPContext *avpriv_float_dsp_alloc(int bit_exact)
         return NULL;
 
     fdsp->vector_fmul = vector_fmul_c;
+    fdsp->vector_dmul = vector_dmul_c;
     fdsp->vector_fmac_scalar = vector_fmac_scalar_c;
     fdsp->vector_fmul_scalar = vector_fmul_scalar_c;
     fdsp->vector_dmac_scalar = vector_dmac_scalar_c;

libavutil/float_dsp.h

@@ -173,6 +173,22 @@ typedef struct AVFloatDSPContext {
      * @return sum of elementwise products
      */
     float (*scalarproduct_float)(const float *v1, const float *v2, int len);
+
+    /**
+     * Calculate the entry wise product of two vectors of doubles and store the result in
+     * a vector of doubles.
+     *
+     * @param dst  output vector
+     *             constraints: 32-byte aligned
+     * @param src0 first input vector
+     *             constraints: 32-byte aligned
+     * @param src1 second input vector
+     *             constraints: 32-byte aligned
+     * @param len  number of elements in the input
+     *             constraints: multiple of 16
+     */
+    void (*vector_dmul)(double *dst, const double *src0, const double *src1,
+                        int len);
 } AVFloatDSPContext;
 
 /**