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55 lines
2.0 KiB
C
55 lines
2.0 KiB
C
/**
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* Copyright (c) 2012-2016 Moodstocks SAS
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef JPEC_HUFFMAN_H
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#define JPEC_HUFFMAN_H
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#include <stdint.h>
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#include "enc.h"
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#include "buf.h"
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/** Entropy coding data that hold state along blocks */
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typedef struct jpec_huff_state_t_ {
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int32_t buffer; /* bits buffer */
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int nbits; /* number of bits remaining in buffer */
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int dc; /* DC coefficient from previous block (or 0) */
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jpec_buffer_t *buf; /* JPEG global buffer */
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} jpec_huff_state_t;
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/** Type of an Huffman JPEG encoder */
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typedef struct jpec_huff_t_ {
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jpec_huff_state_t state; /* state from previous block encoding */
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} jpec_huff_t;
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/** Skeleton initialization */
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void jpec_huff_skel_init(jpec_huff_skel_t *skel);
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jpec_huff_t *jpec_huff_new(void);
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void jpec_huff_del(jpec_huff_t *h);
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void jpec_huff_encode_block(jpec_huff_t *h, jpec_block_t *block, jpec_buffer_t *buf);
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#endif
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