[SCM] libav/experimental: sse16_c is totally fucked up (unaligned loads, LONG_MAX is undefined, uint32 array index -> segv), so let's just use a nice plain unobfuscated version, which also happens to be faster for me.

[siretart at users.alioth.debian.org]

The following commit has been merged in the experimental branch:
commit 6b026927919097153e46b8abb51c4d3b89b827b7
Author: Falk Hüffner <mellum at users.sourceforge.net>
Date:   Sun Jan 19 12:06:36 2003 +0000

    sse16_c is totally fucked up (unaligned loads, LONG_MAX is undefined,
    uint32 array index -> segv), so let's just use a nice plain
    unobfuscated version, which also happens to be faster for me.
    
    Originally committed as revision 1470 to svn://svn.ffmpeg.org/ffmpeg/trunk

diff --git a/libavcodec/dsputil.c b/libavcodec/dsputil.c
index efdb438..3443d03 100644
--- a/libavcodec/dsputil.c
+++ b/libavcodec/dsputil.c
@@ -191,60 +191,32 @@ static int sse8_c(void *v, UINT8 * pix1, UINT8 * pix2, int line_size)
     return s;
 }
 
-static int sse16_c(void *v, UINT8 * pix1, UINT8 * pix2, int line_size)
+static int sse16_c(void *v, uint8_t *pix1, uint8_t *pix2, int line_size)
 {
-    int s, i, j;
-    UINT32 *sq = squareTbl + 256;
+    int s, i;
+    uint32_t *sq = squareTbl + 256;
 
     s = 0;
     for (i = 0; i < 16; i++) {
-        for (j = 0; j < 16; j += 8) {
-#if 1
-#if LONG_MAX > 2147483647
-	    uint64_t x,y;
-	    x=*(uint64_t*)pix1;
-	    y=*(uint64_t*)pix2;
-
-	    s += sq[(x&0xff) - (y&0xff)];
-	    s += sq[((x>>8)&0xff) - ((y>>8)&0xff)];
-	    s += sq[((x>>16)&0xff) - ((y>>16)&0xff)];
-	    s += sq[((x>>24)&0xff) - ((y>>24)&0xff)];
-	    s += sq[((x>>32)&0xff) - ((y>>32)&0xff)];
-	    s += sq[((x>>40)&0xff) - ((y>>40)&0xff)];
-	    s += sq[((x>>48)&0xff) - ((y>>48)&0xff)];
-	    s += sq[((x>>56)&0xff) - ((y>>56)&0xff)];
-#else
-	    uint32_t x,y;
-	    x=*(uint32_t*)pix1;
-	    y=*(uint32_t*)pix2;
-
-	    s += sq[(x&0xff) - (y&0xff)];
-	    s += sq[((x>>8)&0xff) - ((y>>8)&0xff)];
-	    s += sq[((x>>16)&0xff) - ((y>>16)&0xff)];
-	    s += sq[((x>>24)&0xff) - ((y>>24)&0xff)];
-
-	    x=*(uint32_t*)(pix1+4);
-	    y=*(uint32_t*)(pix2+4);
-	    s += sq[(x&0xff) - (y&0xff)];
-	    s += sq[((x>>8)&0xff) - ((y>>8)&0xff)];
-	    s += sq[((x>>16)&0xff) - ((y>>16)&0xff)];
-	    s += sq[((x>>24)&0xff) - ((y>>24)&0xff)];
-#endif
-#else
-            s += sq[pix1[0] - pix2[0]];
-            s += sq[pix1[1] - pix2[1]];
-            s += sq[pix1[2] - pix2[2]];
-            s += sq[pix1[3] - pix2[3]];
-            s += sq[pix1[4] - pix2[4]];
-            s += sq[pix1[5] - pix2[5]];
-            s += sq[pix1[6] - pix2[6]];
-            s += sq[pix1[7] - pix2[7]];
-#endif
-            pix1 += 8;
-            pix2 += 8;
-        }
-        pix1 += line_size - 16;
-        pix2 += line_size - 16;
+        s += sq[pix1[ 0] - pix2[ 0]];
+        s += sq[pix1[ 1] - pix2[ 1]];
+        s += sq[pix1[ 2] - pix2[ 2]];
+        s += sq[pix1[ 3] - pix2[ 3]];
+        s += sq[pix1[ 4] - pix2[ 4]];
+        s += sq[pix1[ 5] - pix2[ 5]];
+        s += sq[pix1[ 6] - pix2[ 6]];
+        s += sq[pix1[ 7] - pix2[ 7]];
+        s += sq[pix1[ 8] - pix2[ 8]];
+        s += sq[pix1[ 9] - pix2[ 9]];
+        s += sq[pix1[10] - pix2[10]];
+        s += sq[pix1[11] - pix2[11]];
+        s += sq[pix1[12] - pix2[12]];
+        s += sq[pix1[13] - pix2[13]];
+        s += sq[pix1[14] - pix2[14]];
+        s += sq[pix1[15] - pix2[15]];
+
+        pix1 += line_size;
+        pix2 += line_size;
     }
     return s;
 }

-- 
Libav/FFmpeg packaging