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cleaner way of writing packed-byte constants.

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suggested by Uoti Urpala

Originally committed as revision 12177 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Loren Merritt 2008-02-22 16:53:26 +00:00
parent 0cb2559445
commit 917f55cc03
1 changed files with 3 additions and 2 deletions
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5
libavcodec/dsputil.c
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@ -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,