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cleaner way of writing packed-byte constants.
author
Loren Merritt
<lorenm@u.washington.edu>
Fri, 22 Feb 2008 16:53:26 +0000
(16:53 +0000)
committer
Loren Merritt
<lorenm@u.washington.edu>
Fri, 22 Feb 2008 16:53:26 +0000
(16:53 +0000)
suggested by Uoti Urpala
Originally committed as revision 12177 to svn://svn.ffmpeg.org/ffmpeg/trunk
libavcodec/dsputil.c
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diff --git
a/libavcodec/dsputil.c
b/libavcodec/dsputil.c
index
1514a4a
..
07511de
100644
(file)
--- 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,