54 lines
1.9 KiB
C
54 lines
1.9 KiB
C
/* quirc -- QR-code recognition library
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* Copyright (C) 2010-2012 Daniel Beer <dlbeer@gmail.com>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef MJPEG_H_
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#define MJPEG_H_
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#include <stdint.h>
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#include <stdio.h>
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#include <jpeglib.h>
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#include <setjmp.h>
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struct mjpeg_decoder {
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/* The error manager must be the first item in this struct */
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struct jpeg_error_mgr err;
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struct jpeg_decompress_struct dinfo;
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struct jpeg_source_mgr src;
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jmp_buf env;
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};
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/* Construct an MJPEG decoder. */
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void mjpeg_init(struct mjpeg_decoder *mj);
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/* Free any memory allocated while decoding MJPEG frames. */
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void mjpeg_free(struct mjpeg_decoder *mj);
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/* Decode a single MJPEG image to the buffer given, in RGB format.
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* Returns 0 on success, -1 if an error occurs (bad data, or image too
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* big for buffer).
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*/
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int mjpeg_decode_rgb32(struct mjpeg_decoder *mj,
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const uint8_t *data, int datalen,
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uint8_t *out, int pitch, int max_w, int max_h);
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/* Decode a single MJPEG image to the buffer given in 8-bit grayscale.
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* Returns 0 on success, -1 if an error occurs.
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*/
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int mjpeg_decode_gray(struct mjpeg_decoder *mj,
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const uint8_t *data, int datalen,
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uint8_t *out, int pitch, int max_w, int max_h);
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#endif
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