69 lines
2.4 KiB
C
69 lines
2.4 KiB
C
/*
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lj92.h
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(c) Andrew Baldwin 2014
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Permission is hereby granted, free of charge, to any person obtaining a copy of
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this software and associated documentation files (the "Software"), to deal in
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the Software without restriction, including without limitation the rights to
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use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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of the Software, and to permit persons to whom the Software is furnished to do
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so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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*/
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#ifndef LJ92_H
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#define LJ92_H
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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enum LJ92_ERRORS {
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LJ92_ERROR_NONE = 0,
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LJ92_ERROR_CORRUPT = -1,
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LJ92_ERROR_NO_MEMORY = -2,
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LJ92_ERROR_BAD_HANDLE = -3,
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LJ92_ERROR_TOO_WIDE = -4,
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};
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typedef struct _ljp* lj92;
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/* Parse a lossless JPEG (1992) structure returning
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* - a handle that can be used to decode the data
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* - width/height/bitdepth of the data
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* Returns status code.
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* If status == LJ92_ERROR_NONE, handle must be closed with lj92_close
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*/
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int lj92_open(lj92* lj, // Return handle here
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uint8_t* data,int datalen, // The encoded data
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int* width,int* height,int* bitdepth); // Width, height and bitdepth
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/* Release a decoder object */
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void lj92_close(lj92 lj);
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/*
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* Decode previously opened lossless JPEG (1992) into a 2D tile of memory
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* Starting at target, write writeLength 16bit values, then skip 16bit skipLength value before writing again
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* If linearize is not NULL, use table at linearize to convert data values from output value to target value
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* Data is only correct if LJ92_ERROR_NONE is returned
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*/
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int lj92_decode(lj92 lj,
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uint16_t* target, int writeLength, int skipLength, // The image is written to target as a tile
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uint16_t* linearize, int linearizeLength); // If not null, linearize the data using this table
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#endif
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#ifdef __cplusplus
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}
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#endif
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