twinvq: add SSE/AVX optimized sum/difference stereo interleaving

1 files changed, 13 insertions, 0 deletions

diff --git a/libavcodec/dsputil.c b/libavcodec/dsputil.c
index 182063ca2b..91238578b6 100644
--- a/libavcodec/dsputil.c
+++ b/libavcodec/dsputil.c
@@ -2509,6 +2509,18 @@ static void butterflies_float_c(float *restrict v1, float *restrict v2,
     }
 }
 
+static void butterflies_float_interleave_c(float *dst, const float *src0,
+                                           const float *src1, int len)
+{
+    int i;
+    for (i = 0; i < len; i++) {
+        float f1 = src0[i];
+        float f2 = src1[i];
+        dst[2*i    ] = f1 + f2;
+        dst[2*i + 1] = f1 - f2;
+    }
+}
+
 static float scalarproduct_float_c(const float *v1, const float *v2, int len)
 {
     float p = 0.0;
@@ -3036,6 +3048,7 @@ av_cold void dsputil_init(DSPContext* c, AVCodecContext *avctx)
     c->vector_clip_int32 = vector_clip_int32_c;
     c->scalarproduct_float = scalarproduct_float_c;
     c->butterflies_float = butterflies_float_c;
+    c->butterflies_float_interleave = butterflies_float_interleave_c;
     c->vector_fmul_scalar = vector_fmul_scalar_c;
     c->vector_fmac_scalar = vector_fmac_scalar_c;