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Use IDWT whole tile decoding if the area of interest equals to the image bounds, taking into account the reduced resolution factor

This commit is contained in:
Even Rouault 2017-08-29 11:40:53 +02:00
parent 4776b15fa7
commit 04b70908a7
1 changed files with 16 additions and 7 deletions
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23
src/lib/openjp2/dwt.c
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@ -1195,7 +1195,7 @@ OPJ_BOOL opj_dwt_encode(opj_tcd_tilecomp_t * tilec)
}
static OPJ_BOOL opj_dwt_is_whole_tile_decoding(opj_tcd_t *p_tcd,
opj_tcd_tilecomp_t* tilec)
opj_tcd_tilecomp_t* tilec, OPJ_UINT32 numres)
{
opj_image_comp_t* image_comp = &(p_tcd->image->comps[tilec->compno]);
/* Compute the intersection of the area of interest, expressed in tile coordinates */
@ -1212,10 +1212,19 @@ static OPJ_BOOL opj_dwt_is_whole_tile_decoding(opj_tcd_t *p_tcd,
OPJ_UINT32 tcy1 = opj_uint_min(
(OPJ_UINT32)tilec->y1,
opj_uint_ceildiv(p_tcd->decoded_y1, image_comp->dy));
return (tcx0 == (OPJ_UINT32)tilec->x0 &&
tcy0 == (OPJ_UINT32)tilec->y0 &&
tcx1 == (OPJ_UINT32)tilec->x1 &&
tcy1 == (OPJ_UINT32)tilec->y1);
OPJ_UINT32 shift = tilec->numresolutions - numres;
/* Tolerate small margin within the reduced resolution factor to consider if */
/* the whole tile path must be taken */
return (tcx0 >= (OPJ_UINT32)tilec->x0 &&
((tcx0 - (OPJ_UINT32)tilec->x0) >> shift) == 0 &&
tcy0 >= (OPJ_UINT32)tilec->y0 &&
((tcy0 - (OPJ_UINT32)tilec->y0) >> shift) == 0 &&
tcx1 <= (OPJ_UINT32)tilec->x1 &&
(((OPJ_UINT32)tilec->x1 - tcx1) >> shift) == 0 &&
tcy1 <= (OPJ_UINT32)tilec->y1 &&
(((OPJ_UINT32)tilec->y1 - tcy1) >> shift) == 0);
}
/* <summary> */
@ -1224,7 +1233,7 @@ static OPJ_BOOL opj_dwt_is_whole_tile_decoding(opj_tcd_t *p_tcd,
OPJ_BOOL opj_dwt_decode(opj_tcd_t *p_tcd, opj_tcd_tilecomp_t* tilec,
OPJ_UINT32 numres)
{
if (opj_dwt_is_whole_tile_decoding(p_tcd, tilec)) {
if (opj_dwt_is_whole_tile_decoding(p_tcd, tilec, numres)) {
return opj_dwt_decode_tile(p_tcd->thread_pool, tilec, numres);
} else {
return opj_dwt_decode_partial_tile(p_tcd, tilec, numres);
@ -2464,7 +2473,7 @@ OPJ_BOOL opj_dwt_decode_real(opj_tcd_t *p_tcd,
opj_tcd_tilecomp_t* OPJ_RESTRICT tilec,
OPJ_UINT32 numres)
{
if (opj_dwt_is_whole_tile_decoding(p_tcd, tilec)) {
if (opj_dwt_is_whole_tile_decoding(p_tcd, tilec, numres)) {
return opj_dwt_decode_tile_97(tilec, numres);
} else {
return opj_dwt_decode_partial_97(p_tcd, tilec, numres);