a7eb278df1
* origin/master: (23 commits) Update .gitignore .func/.endfunc are only necessary when generating STABS debug info, which basically went out of style with parachute pants and Rick Astley. At any rate, none of the platforms for which we're building the ARM code use it (DWARF is the common format these days), and the .func/.endfunc directives cause the clang integrated assembler to fail (http://llvm.org/bugs/show_bug.cgi?id=20424). Enable DC trellis by default Avoid double inline attribute Detect libpng Implement DHT Merging Add .gitignore for autotools files Check memory alloc success Update cjpeg usage text Implement DQT merging Fix issue with scan printout Get rid of unnecessary and obsolete platform configuration instructions. Add error checks for malloc calls that don't already have them. Issue #87. yuvjpeg: fix trivial leak Parse quality as float PNG reading support Fix issue with DC trellis Add option to split DC scans Add trellis for DC Bump version to 2.1. ... Conflicts: BUILDING.txt cdjpeg.h jcdctmgr.c jchuff.h jcmarker.c jcmaster.c jconfig.txt jpeglib.h rdswitch.c
49 lines
1.7 KiB
C
49 lines
1.7 KiB
C
/*
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* jchuff.h
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*
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* This file was part of the Independent JPEG Group's software:
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* Copyright (C) 1991-1997, Thomas G. Lane.
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* It was modified by The libjpeg-turbo Project to include only code relevant
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* to libjpeg-turbo.
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* mozjpeg Modifications:
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* Copyright (C) 2014, Mozilla Corporation.
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* For conditions of distribution and use, see the accompanying README file.
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*
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* This file contains declarations for Huffman entropy encoding routines
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* that are shared between the sequential encoder (jchuff.c) and the
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* progressive encoder (jcphuff.c). No other modules need to see these.
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*/
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/* The legal range of a DCT coefficient is
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* -1024 .. +1023 for 8-bit data;
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* -16384 .. +16383 for 12-bit data.
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* Hence the magnitude should always fit in 10 or 14 bits respectively.
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*/
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#if BITS_IN_JSAMPLE == 8
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#define MAX_COEF_BITS 10
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#else
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#define MAX_COEF_BITS 14
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#endif
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/* Derived data constructed for each Huffman table */
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typedef struct {
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unsigned int ehufco[256]; /* code for each symbol */
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char ehufsi[256]; /* length of code for each symbol */
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/* If no code has been allocated for a symbol S, ehufsi[S] contains 0 */
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} c_derived_tbl;
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/* Expand a Huffman table definition into the derived format */
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EXTERN(void) jpeg_make_c_derived_tbl
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(j_compress_ptr cinfo, boolean isDC, int tblno,
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c_derived_tbl ** pdtbl);
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/* Generate an optimal table definition given the specified counts */
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EXTERN(void) jpeg_gen_optimal_table
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(j_compress_ptr cinfo, JHUFF_TBL * htbl, long freq[]);
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EXTERN(void) quantize_trellis
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(j_compress_ptr cinfo, c_derived_tbl *dctbl, c_derived_tbl *actbl, JBLOCKROW coef_blocks, JBLOCKROW src, JDIMENSION num_blocks,
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JQUANT_TBL * qtbl, double *norm_src, double *norm_coef, JCOEF *last_dc_val);
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