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Diffstat (limited to 'test/decode/tinyjpeg-internal.h')
-rw-r--r-- | test/decode/tinyjpeg-internal.h | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/test/decode/tinyjpeg-internal.h b/test/decode/tinyjpeg-internal.h new file mode 100644 index 0000000..9caead5 --- /dev/null +++ b/test/decode/tinyjpeg-internal.h @@ -0,0 +1,120 @@ +/* + * Small jpeg decoder library (Internal header) + * + * Copyright (c) 2006, Luc Saillard <luc@saillard.org> + * Copyright (c) 2012 Intel Corporation. + * All rights reserved. + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * - Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * - Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * - Neither the name of the author nor the names of its contributors may be + * used to endorse or promote products derived from this software without + * specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + */ + + +#ifndef __TINYJPEG_INTERNAL_H_ +#define __TINYJPEG_INTERNAL_H_ + +#include <setjmp.h> + +#define SANITY_CHECK 1 + +struct jdec_private; + +#define HUFFMAN_BITS_SIZE 256 + +#define HUFFMAN_TABLES 4 +#define COMPONENTS 4 +#define JPEG_MAX_WIDTH 2048 +#define JPEG_MAX_HEIGHT 2048 + +enum std_markers { + DQT = 0xDB, /* Define Quantization Table */ + SOF = 0xC0, /* Start of Frame (size information) */ + DHT = 0xC4, /* Huffman Table */ + SOI = 0xD8, /* Start of Image */ + SOS = 0xDA, /* Start of Scan */ + RST = 0xD0, /* Reset Marker d0 -> .. */ + RST7 = 0xD7, /* Reset Marker .. -> d7 */ + EOI = 0xD9, /* End of Image */ + DRI = 0xDD, /* Define Restart Interval */ + APP0 = 0xE0, +}; + + +struct huffman_table +{ + /*bits and values*/ + unsigned char bits[16]; + unsigned char values[256]; +}; + +struct component +{ + unsigned int Hfactor; + unsigned int Vfactor; + unsigned char quant_table_index; + unsigned int cid; +}; + + +typedef void (*decode_MCU_fct) (struct jdec_private *priv); +typedef void (*convert_colorspace_fct) (struct jdec_private *priv); + +struct jpeg_sos +{ + unsigned int nr_components; + struct { + unsigned int component_id; + unsigned int dc_selector; + unsigned int ac_selector; + }components[4]; +}; + +struct jdec_private +{ + /* Public variables */ + unsigned int width, height; /* Size of the image */ + + /* Private variables */ + const unsigned char *stream_begin, *stream_end; + unsigned int stream_length; + + const unsigned char *stream; /* Pointer to the current stream */ + + struct component component_infos[COMPONENTS]; + unsigned int nf_components; + unsigned char Q_tables[COMPONENTS][64]; /* quantization tables, zigzag*/ + unsigned char Q_tables_valid[COMPONENTS]; + struct huffman_table HTDC[HUFFMAN_TABLES]; /* DC huffman tables */ + unsigned char HTDC_valid[HUFFMAN_TABLES]; + struct huffman_table HTAC[HUFFMAN_TABLES]; /* AC huffman tables */ + unsigned char HTAC_valid[HUFFMAN_TABLES]; + struct jpeg_sos cur_sos; /* current sos values*/ + int default_huffman_table_initialized; + int restart_interval; +}; + +#endif + |