diff options
| author | Even Rouault <even.rouault@spatialys.com> | 2017-09-19 16:52:07 +0200 |
|---|---|---|
| committer | Even Rouault <even.rouault@spatialys.com> | 2017-09-19 17:06:19 +0200 |
| commit | 7e2b6bebff12eab8bdc17fc9af017e8c11652f4f (patch) | |
| tree | 1f1456a4b3962862d3ab581e7b1b080919c53d34 /src/lib/openjp2/tcd.h | |
| parent | ce199f42e77f972d6ee782b63492f6d861891053 (diff) | |
Add capability to decode only a subset of all components of an image.
This adds a opj_set_decoded_components(opj_codec_t *p_codec,
OPJ_UINT32 numcomps, const OPJ_UINT32* comps_indices) function,
and equivalent "opj_decompress -c compno[,compno]*" option.
When specified, neither the MCT transform nor JP2 channel transformations
will be applied.
Tests added for various combinations of whole image vs tiled-based decoding,
full or reduced resolution, use of decode area or not.
Diffstat (limited to 'src/lib/openjp2/tcd.h')
| -rw-r--r-- | src/lib/openjp2/tcd.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/lib/openjp2/tcd.h b/src/lib/openjp2/tcd.h index 63c22c45..e3214c1d 100644 --- a/src/lib/openjp2/tcd.h +++ b/src/lib/openjp2/tcd.h @@ -280,6 +280,8 @@ typedef struct opj_tcd { OPJ_UINT32 win_y1; /** Only valid for decoding. Whether the whole tile is decoded, or just the region in win_x0/win_y0/win_x1/win_y1 */ OPJ_BOOL whole_tile_decoding; + /* Array of size image->numcomps indicating if a component must be decoded. NULL if all components must be decoded */ + OPJ_BOOL* used_component; } opj_tcd_t; /** @name Exported functions */ @@ -381,6 +383,10 @@ Decode a tile from a buffer into a raw image @param win_y0 Upper left y of region to decode (in grid coordinates) @param win_x1 Lower right x of region to decode (in grid coordinates) @param win_y1 Lower right y of region to decode (in grid coordinates) +@param numcomps_to_decode Size of the comps_indices array, or 0 if decoding all components. +@param comps_indices Array of numcomps values representing the indices + of the components to decode (relative to the + codestream, starting at 0). Or NULL if decoding all components. @param src Source buffer @param len Length of source buffer @param tileno Number that identifies one of the tiles to be decoded @@ -392,6 +398,8 @@ OPJ_BOOL opj_tcd_decode_tile(opj_tcd_t *tcd, OPJ_UINT32 win_y0, OPJ_UINT32 win_x1, OPJ_UINT32 win_y1, + OPJ_UINT32 numcomps_to_decode, + const OPJ_UINT32 *comps_indices, OPJ_BYTE *src, OPJ_UINT32 len, OPJ_UINT32 tileno, |