168 lines
No EOL
14 KiB
C
Executable file
168 lines
No EOL
14 KiB
C
Executable file
/*================================================================================================*\
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|| ||
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|| /$$$$$$$ /$$ /$$ /$$ /$$ ||
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|| | $$__ $$|__/ | $$ /$ | $$| $$ ||
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|| | $$ \ $$ /$$ /$$$$$$ | $$ /$$$| $$| $$$$$$$ /$$$$$$ /$$$$$$ /$$$$$$ ||
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|| | $$$$$$$ | $$ /$$__ $$ | $$/$$ $$ $$| $$__ $$ /$$__ $$ /$$__ $$ /$$__ $$ ||
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|| | $$__ $$| $$| $$ \ $$ | $$$$_ $$$$| $$ \ $$| $$ \ $$| $$ \ $$| $$ \ $$ ||
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|| | $$ \ $$| $$| $$ | $$ | $$$/ \ $$$| $$ | $$| $$ | $$| $$ | $$| $$ | $$ ||
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|| | $$$$$$$/| $$| $$$$$$$ | $$/ \ $$| $$ | $$| $$$$$$/| $$$$$$/| $$$$$$$/ ||
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|| |_______/ |__/ \____ $$ |__/ \__/|__/ |__/ \______/ \______/ | $$____/ ||
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|| /$$ \ $$ | $$ ||
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|| | $$$$$$/ | $$ ||
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|| \______/ |__/ ||
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|| ||
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|| DESCRIPTION: ||
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|| ------------ ||
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|| This file describes a set of functions that can be used to de-/encode bwc ||
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|| codeblocks described by the bwc_field structure according to the embedded block ||
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|| coding paradigm described by the JPEG 2000 standard. For more information please ||
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|| refere to JPEG2000 by D. S. Taubman and M. W. Marcellin. ||
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|| ||
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|| -------------------------------------------------------------------------------------------- ||
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|| Copyright (c) 2023, High Performance Computing Center - University of Stuttgart ||
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|| Redistribution and use in source and binary forms, with or without modification, are ||
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|| permitted provided that the following conditions are met: ||
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|| ||
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|| (1) Redistributions of source code must retain the above copyright notice, this list of ||
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|| conditions and the following disclaimer. ||
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|| ||
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|| (2) Redistributions in binary form must reproduce the above copyright notice, this list ||
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|| of conditions and the following disclaimer in the documentation and/or other ||
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|| materials provided with the distribution. ||
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|| ||
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|| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS “AS IS” AND ANY EXPRESS ||
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|| OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF ||
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|| MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE ||
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|| COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, ||
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|| EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF ||
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|| SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) ||
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|| HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR ||
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|| TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, ||
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|| EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ||
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\*================================================================================================*/
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#ifndef TIER1_H
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#define TIER1_H
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/************************************************************************************************\
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|| _ _ _ ____ _ _ _ ___ ____ ||
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|| | |\ | | | | | | \ |___ ||
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|| | | \| |___ |___ |__| |__/ |___ ||
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\************************************************************************************************/
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#include "types.h"
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/************************************************************************************************\
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|| _ _ ____ ____ ____ ____ ____ ||
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|| |\/| |__| | |__/ | | [__ ||
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|| | | | | |___ | \ |__| ___] ||
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\************************************************************************************************/
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/*----------------------------------------------------------------------------------------------*\
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! !
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! DESCRIPTION: !
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! ------------ !
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! !
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! The macros listed indicate how many bits, from the current coding position, !
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! are used for error evaluation in the coding passes. !
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! !
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\*----------------------------------------------------------------------------------------------*/
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#define DISTORTION_SIG 5 // Clean up/significance propagation pass.
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#define DISTORTION_MAG 6 // Magnitude refinement pass.
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/************************************************************************************************\
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|| ___ ____ ____ ____ _ _ _ ____ ___ ___ _ _ ___ ____ ____ ||
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|| | \ |___ |__/ |__/ | | | |___ | \ | \_/ |__] |___ [__ ||
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|| |__/ |___ | \ | \ | \/ |___ |__/ | | | |___ ___] ||
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\************************************************************************************************/
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/*----------------------------------------------------------------------------------------------*\
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! !
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! DESCRIPTION: !
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! ------------ !
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! !
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! This structure holds the sign (xi), bitfield (bit) and state (delta, sigma and !
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! pi) information for four vertically adjacent samples for easy access during the !
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! entropy encoding stage. Here, the delayed significance is set once the first bit !
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! is encoded during the magnitude refinement pass, while the significance state !
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! sigma is set once the first non-zero bit is encoded for a specific sample. !
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! The stripe_* pointers are used to store the address of the left(l), upper(u), !
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! right(r) and lower(d) neighbour of a specific stripe for easy access. To !
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! facilitate distortion estimation the magnitude of the wavelet coefficients is !
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! stored in an appropriate sample array. !
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! !
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\*----------------------------------------------------------------------------------------------*/
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typedef struct stripe
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{
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uint64 *sample; // Wavelet coef. for two adjacent stripes.
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uint8 delta; // Delayed sig. for two adjacent stripes.
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uint8 sigma; // Significance for two adjacent stripes.
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uint8 pi; // Cdng pass membership for adj. stripes.
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uint8 codingpass; // Last decoded coding pass.
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uint8 bitplane; // Last decoded bitplane.
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uint8 *bit; // Bitplanes for vertically adj. stripes.
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uint8 xi; // Wvlt coef. sign bit for adj. stripes.
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struct stripe *stripe_u; // Upper stripe.
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struct stripe *stripe_r; // Right stripe.
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struct stripe *stripe_d; // Lower stripe.
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struct stripe *stripe_l; // Left stripe.
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} bwc_coder_stripe;
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/*----------------------------------------------------------------------------------------------*\
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! !
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! DESCRIPTION: !
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! ------------ !
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! !
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! This structure accumulates all necessary structures used to (de-)compress a !
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! codeblock of wavelet coefficients. The spatial and temporal dimension of the !
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! codeblock is defined by its width, height and number of slices (depth * dt). The !
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! codeblock itself is subdivided into so-called stripes that represent 4 vertical- !
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! ly adjacent coefficients. The parameter no_full_stripes stores overnumber of !
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! full stripes present in one slice. !
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! The look-up table sig2context is used to determine the coding context of a cur- !
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! ren bit according to its significance context within the codeblock bitplane. !
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! The look-up table is specific to a certain highband and is set accordingly. !
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! !
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\*----------------------------------------------------------------------------------------------*/
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typedef struct
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{
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uchar highband_flag; // Flag indicating current wavelet subbnd.
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uint8 K; // Idx of the first significant bitplane.
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uchar erres; // Flag signaling error resilience.
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uint64 no_full_stripe; // Number of full, vert. adjacent stripes.
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uint64 width, height; // Codeblock width and height.
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uint64 no_slice; // N.o. slices in the spec. codeblock.
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uint8 const *sig2context; // Signifance-to-context loop-up table.
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bwc_bit_coder *bitcoder; // BWC bitcoder.
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bwc_coder_stripe *data; // BWC coder stripe.
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uint64 buff_size; // Size of packed stream.
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uint64 buff_incr; // Increment for packed stream assembly.
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uchar *compressed; // Compressed data chunck.
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} bwc_coder;
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/************************************************************************************************\
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|| ___ _ _ ___ _ _ ____ ____ _ _ _ _ ____ ___ _ ____ _ _ ____ ||
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|| |__] | | |__] | | | |___ | | |\ | | | | | | |\ | [__ ||
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|| | |__| |__] |___ | |___ | |__| | \| |___ | | |__| | \| ___] ||
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\************************************************************************************************/
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uchar t1_encode (bwc_field *const field,
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bwc_tile *const tile,
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bwc_parameter *const parameter);
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//==========|==========================|======================|======|=======|====================
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uchar t1_decode (bwc_field *const field,
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bwc_tile *const tile,
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bwc_parameter *const parameter);
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#endif |