vble: use dsp.add_hfyu_median_prediction() this allows asm optimizations to be used.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

libavcodec/vble.c

@@ -27,10 +27,12 @@
 #define ALT_BITSTREAM_READER_LE
 
 #include "avcodec.h"
+#include "dsputil.h"
 #include "get_bits.h"
 
 typedef struct {
     AVCodecContext *avctx;
+    DSPContext dsp;
 
     int            size;
     uint8_t        *val; /* First holds the lengths of vlc symbols and then their values */
@@ -86,27 +88,22 @@ static void vble_restore_plane(VBLEContext *ctx, int plane, int offset,
     AVFrame *pic = ctx->avctx->coded_frame;
     uint8_t *dst = pic->data[plane];
     uint8_t *val = ctx->val + offset;
-    uint8_t a, b, c;
     int stride = pic->linesize[plane];
-    int i, j;
+    int i, j, left, left_top;
 
     for (i = 0; i < height; i++) {
-        for (j = 0; j < width; j++) {
-            dst[j] = (val[j] >> 1) ^ -(val[j] & 1);
-
-            /* Top line and left column are not predicted */
-            if (!j)
-                continue;
-
-            if (!i) {
-                dst[j] += dst[j - 1];
-                continue;
-            }
-
-            a = dst[j - 1];
-            b = dst[j - stride];
-            c = a + b - dst[j - 1 - stride];
-            dst[j] += mid_pred(a, b, c);
+        for (j = 0; j < width; j++)
+            val[j] = (val[j] >> 1) ^ -(val[j] & 1);
+
+        if (i) {
+            left = 0;
+            left_top = dst[-stride];
+            ctx->dsp.add_hfyu_median_prediction(dst, dst-stride, val,
+                                                width, &left, &left_top);
+        } else {
+            dst[0] = val[0];
+            for (j = 1; j < width; j++)
+                dst[j] = val[j] + dst[j - 1];
         }
         dst += stride;
         val += width;
@@ -194,6 +191,7 @@ static av_cold int vble_decode_init(AVCodecContext *avctx)
 
     /* Stash for later use */
     ctx->avctx = avctx;
+    dsputil_init(&ctx->dsp, avctx);
 
     avctx->pix_fmt = PIX_FMT_YUV420P;
     avctx->bits_per_raw_sample = 8;