From 8f9c38b19629838066def1207703cfcdc19fcbc9 Mon Sep 17 00:00:00 2001
From: Martin Vignali <martin.vignali@gmail.com>
Date: Sun, 14 Jan 2018 14:23:05 +0100
Subject: avcodec/utvideoenc : add SIMD (avx) for sub_left_prediction

asm code by Henrik Gramner
---
 libavcodec/lossless_videoencdsp.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'libavcodec/lossless_videoencdsp.c')

diff --git a/libavcodec/lossless_videoencdsp.c b/libavcodec/lossless_videoencdsp.c
index 5cc4934c0e..ed70329628 100644
--- a/libavcodec/lossless_videoencdsp.c
+++ b/libavcodec/lossless_videoencdsp.c
@@ -74,10 +74,25 @@ static void sub_median_pred_c(uint8_t *dst, const uint8_t *src1,
     *left_top = lt;
 }
 
+static void sub_left_predict_c(uint8_t *dst, uint8_t *src,
+                               ptrdiff_t stride, ptrdiff_t width, int height)
+{
+    int i, j;
+    uint8_t prev = 0x80; /* Set the initial value */
+    for (j = 0; j < height; j++) {
+        for (i = 0; i < width; i++) {
+            *dst++ = src[i] - prev;
+            prev   = src[i];
+        }
+        src += stride;
+    }
+}
+
 av_cold void ff_llvidencdsp_init(LLVidEncDSPContext *c)
 {
     c->diff_bytes      = diff_bytes_c;
     c->sub_median_pred = sub_median_pred_c;
+    c->sub_left_predict = sub_left_predict_c;
 
     if (ARCH_X86)
         ff_llvidencdsp_init_x86(c);
-- 
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