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