Simplify RGB32 png encoding.

[ffmpeg] / libavcodec / dsputil.c

diff --git a/libavcodec/dsputil.c b/libavcodec/dsputil.c
index 6a33ef4f87a4c1ddd0097e1acc3598ee3c85f962..80ed6503fadc3400f1d85a2813400ce3b0e0193e 100644 (file)
--- a/libavcodec/dsputil.c
+++ b/libavcodec/dsputil.c
@@ -1824,7 +1824,7 @@ static void add_8x8basis_c(int16_t rem[64], int16_t basis[64], int scale){
 }
 
 /**
- * permutes an 8x8 block.
+ * Permute an 8x8 block.
  * @param block the block which will be permuted according to the given permutation vector
  * @param permutation the permutation vector
  * @param last the last non zero coefficient in scantable order, used to speed the permutation up
@@ -2543,6 +2543,18 @@ 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;
@@ -3066,6 +3078,7 @@ 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;