commit 1e7bf8805bd030c19924a5306837ecd72c295751
author Vikas Arora <vikasa@google.com> Wed Mar 13 16:43:18 2013 -0700
committer Vikas Arora <vikasa@google.com> Thu Mar 14 10:15:22 2013 -0700
tree 20a7189518b1824f7805016e9718e26e9c3a6668
parent b6dbce6bfeaabde2a7b581c4c6888d532d32f3ac

Sync-patch with libwebp (ChangeId: Ia5475247)

Added 16bit swapping of RGB565 / RGB4444 colorspace.
Added ARM/NEON code for decoder/encoder modules.
Speedup in WebP compression (method 3 and above).

Change-Id: I95a697338bef7c3ea08054eb5f850a97d1889eb9

src/dsp/yuv.c

diff --git a/src/dsp/yuv.c b/src/dsp/yuv.c
index 7f05f9a..3889528 100644
--- a/src/dsp/yuv.c
+++ b/src/dsp/yuv.c
@@ -33,6 +33,7 @@
   if (done) {
     return;
   }
+#ifndef USE_YUVj
   for (i = 0; i < 256; ++i) {
     VP8kVToR[i] = (89858 * (i - 128) + YUV_HALF) >> YUV_FIX;
     VP8kUToG[i] = -22014 * (i - 128) + YUV_HALF;
@@ -44,6 +45,20 @@
     VP8kClip[i - YUV_RANGE_MIN] = clip(k, 255);
     VP8kClip4Bits[i - YUV_RANGE_MIN] = clip((k + 8) >> 4, 15);
   }
+#else
+  for (i = 0; i < 256; ++i) {
+    VP8kVToR[i] = (91881 * (i - 128) + YUV_HALF) >> YUV_FIX;
+    VP8kUToG[i] = -22554 * (i - 128) + YUV_HALF;
+    VP8kVToG[i] = -46802 * (i - 128);
+    VP8kUToB[i] = (116130 * (i - 128) + YUV_HALF) >> YUV_FIX;
+  }
+  for (i = YUV_RANGE_MIN; i < YUV_RANGE_MAX; ++i) {
+    const int k = i;
+    VP8kClip[i - YUV_RANGE_MIN] = clip(k, 255);
+    VP8kClip4Bits[i - YUV_RANGE_MIN] = clip((k + 8) >> 4, 15);
+  }
+#endif
+
   done = 1;
 }