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Fix some calculations in opj_tcd_init_tile 

Fixes #486
Fixes #394
Update #480
Update #388
This commit is contained in:
mayeut 2015-08-23 11:38:04 +02:00
parent 589cc547b9
commit 38770403d4
2 changed files with 18 additions and 10 deletions
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12
src/lib/openjp2/opj_intmath.h
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@ -135,7 +135,15 @@ Divide an integer by a power of 2 and round upwards
@return Returns a divided by 2^b
*/
static INLINE OPJ_INT32 opj_int_ceildivpow2(OPJ_INT32 a, OPJ_INT32 b) {
return (OPJ_INT32)((a + (OPJ_INT64)(1 << b) - 1) >> b);
return (OPJ_INT32)((a + ((OPJ_INT64)1 << b) - 1) >> b);
}
/**
Divide a 64bits integer by a power of 2 and round upwards
@return Returns a divided by 2^b
*/
static INLINE OPJ_INT32 opj_int64_ceildivpow2(OPJ_INT64 a, OPJ_INT32 b) {
return (OPJ_INT32)((a + ((OPJ_INT64)1 << b) - 1) >> b);
}
/**
@ -143,7 +151,7 @@ static INLINE OPJ_INT32 opj_int_ceildivpow2(OPJ_INT32 a, OPJ_INT32 b) {
@return Returns a divided by 2^b
*/
static INLINE OPJ_UINT32 opj_uint_ceildivpow2(OPJ_UINT32 a, OPJ_UINT32 b) {
return (OPJ_UINT32)((a + (OPJ_UINT64)(1U << b) - 1U) >> b);
return (OPJ_UINT32)((a + ((OPJ_UINT64)1U << b) - 1U) >> b);
}
/**

8
src/lib/openjp2/tcd.c
View File

@ -862,10 +862,10 @@ static INLINE OPJ_BOOL opj_tcd_init_tile(opj_tcd_t *p_tcd, OPJ_UINT32 p_tile_no,
/* y0b = 1 if bandno = 2 or 3 */
l_y0b = (OPJ_INT32)((l_band->bandno)>>1);
/* l_band border (global) */
l_band->x0 = opj_int_ceildivpow2(l_tilec->x0 - (1 << l_level_no) * l_x0b, (OPJ_INT32)(l_level_no + 1));
l_band->y0 = opj_int_ceildivpow2(l_tilec->y0 - (1 << l_level_no) * l_y0b, (OPJ_INT32)(l_level_no + 1));
l_band->x1 = opj_int_ceildivpow2(l_tilec->x1 - (1 << l_level_no) * l_x0b, (OPJ_INT32)(l_level_no + 1));
l_band->y1 = opj_int_ceildivpow2(l_tilec->y1 - (1 << l_level_no) * l_y0b, (OPJ_INT32)(l_level_no + 1));
l_band->x0 = opj_int64_ceildivpow2(l_tilec->x0 - ((OPJ_INT64)l_x0b << l_level_no), (OPJ_INT32)(l_level_no + 1));
l_band->y0 = opj_int64_ceildivpow2(l_tilec->y0 - ((OPJ_INT64)l_y0b << l_level_no), (OPJ_INT32)(l_level_no + 1));
l_band->x1 = opj_int64_ceildivpow2(l_tilec->x1 - ((OPJ_INT64)l_x0b << l_level_no), (OPJ_INT32)(l_level_no + 1));
l_band->y1 = opj_int64_ceildivpow2(l_tilec->y1 - ((OPJ_INT64)l_y0b << l_level_no), (OPJ_INT32)(l_level_no + 1));
}
/** avoid an if with storing function pointer */