[SCM] libav/experimental: cleaner way of writing packed-byte constants. suggested by Uoti Urpala

[siretart at users.alioth.debian.org]

The following commit has been merged in the experimental branch:
commit 917f55cc037b3c1d76f4f7a1b793d3404171fa6e
Author: Loren Merritt <lorenm at u.washington.edu>
Date:   Fri Feb 22 16:53:26 2008 +0000

    cleaner way of writing packed-byte constants.
    suggested by Uoti Urpala
    
    Originally committed as revision 12177 to svn://svn.ffmpeg.org/ffmpeg/trunk

diff --git a/libavcodec/dsputil.c b/libavcodec/dsputil.c
index 1514a4a..07511de 100644
--- a/libavcodec/dsputil.c
+++ b/libavcodec/dsputil.c
@@ -50,8 +50,9 @@ void ff_add_png_paeth_prediction(uint8_t *dst, uint8_t *src, uint8_t *top, int w
 uint8_t ff_cropTbl[256 + 2 * MAX_NEG_CROP] = {0, };
 uint32_t ff_squareTbl[512] = {0, };
 
-static const unsigned long pb_7f = 0x7f7f7f7f7f7f7f7fUL;
-static const unsigned long pb_80 = 0x8080808080808080UL;
+// 0x7f7f7f7f or 0x7f7f7f7f7f7f7f7f or whatever, depending on the cpu's native arithmetic size
+#define pb_7f (~0UL/255 * 0x7f)
+#define pb_80 (~0UL/255 * 0x80)
 
 const uint8_t ff_zigzag_direct[64] = {
     0,   1,  8, 16,  9,  2,  3, 10,

-- 
Libav/FFmpeg packaging