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215 lines
8.3 KiB
215 lines
8.3 KiB
IJG JPEG LIBRARY: FILE LIST |
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Copyright (C) 1994-2013, Thomas G. Lane, Guido Vollbeding. |
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This file is part of the Independent JPEG Group's software. |
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For conditions of distribution and use, see the accompanying README file. |
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Here is a road map to the files in the IJG JPEG distribution. The |
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distribution includes the JPEG library proper, plus two application |
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programs ("cjpeg" and "djpeg") which use the library to convert JPEG |
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files to and from some other popular image formats. A third application |
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"jpegtran" uses the library to do lossless conversion between different |
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variants of JPEG. There are also two stand-alone applications, |
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"rdjpgcom" and "wrjpgcom". |
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THE JPEG LIBRARY |
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================ |
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Include files: |
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jpeglib.h JPEG library's exported data and function declarations. |
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jconfig.h Configuration declarations. Note: this file is not present |
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in the distribution; it is generated during installation. |
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jmorecfg.h Additional configuration declarations; need not be changed |
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for a standard installation. |
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jerror.h Declares JPEG library's error and trace message codes. |
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jinclude.h Central include file used by all IJG .c files to reference |
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system include files. |
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jpegint.h JPEG library's internal data structures. |
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jdct.h Private declarations for forward & reverse DCT subsystems. |
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jmemsys.h Private declarations for memory management subsystem. |
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jversion.h Version information. |
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Applications using the library should include jpeglib.h (which in turn |
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includes jconfig.h and jmorecfg.h). Optionally, jerror.h may be included |
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if the application needs to reference individual JPEG error codes. The |
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other include files are intended for internal use and would not normally |
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be included by an application program. (cjpeg/djpeg/etc do use jinclude.h, |
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since its function is to improve portability of the whole IJG distribution. |
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Most other applications will directly include the system include files they |
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want, and hence won't need jinclude.h.) |
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C source code files: |
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These files contain most of the functions intended to be called directly by |
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an application program: |
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jcapimin.c Application program interface: core routines for compression. |
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jcapistd.c Application program interface: standard compression. |
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jdapimin.c Application program interface: core routines for decompression. |
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jdapistd.c Application program interface: standard decompression. |
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jcomapi.c Application program interface routines common to compression |
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and decompression. |
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jcparam.c Compression parameter setting helper routines. |
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jctrans.c API and library routines for transcoding compression. |
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jdtrans.c API and library routines for transcoding decompression. |
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Compression side of the library: |
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jcinit.c Initialization: determines which other modules to use. |
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jcmaster.c Master control: setup and inter-pass sequencing logic. |
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jcmainct.c Main buffer controller (preprocessor => JPEG compressor). |
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jcprepct.c Preprocessor buffer controller. |
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jccoefct.c Buffer controller for DCT coefficient buffer. |
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jccolor.c Color space conversion. |
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jcsample.c Downsampling. |
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jcdctmgr.c DCT manager (DCT implementation selection & control). |
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jfdctint.c Forward DCT using slow-but-accurate integer method. |
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jfdctfst.c Forward DCT using faster, less accurate integer method. |
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jfdctflt.c Forward DCT using floating-point arithmetic. |
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jchuff.c Huffman entropy coding. |
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jcarith.c Arithmetic entropy coding. |
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jcmarker.c JPEG marker writing. |
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jdatadst.c Data destination managers for memory and stdio output. |
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Decompression side of the library: |
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jdmaster.c Master control: determines which other modules to use. |
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jdinput.c Input controller: controls input processing modules. |
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jdmainct.c Main buffer controller (JPEG decompressor => postprocessor). |
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jdcoefct.c Buffer controller for DCT coefficient buffer. |
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jdpostct.c Postprocessor buffer controller. |
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jdmarker.c JPEG marker reading. |
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jdhuff.c Huffman entropy decoding. |
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jdarith.c Arithmetic entropy decoding. |
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jddctmgr.c IDCT manager (IDCT implementation selection & control). |
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jidctint.c Inverse DCT using slow-but-accurate integer method. |
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jidctfst.c Inverse DCT using faster, less accurate integer method. |
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jidctflt.c Inverse DCT using floating-point arithmetic. |
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jdsample.c Upsampling. |
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jdcolor.c Color space conversion. |
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jdmerge.c Merged upsampling/color conversion (faster, lower quality). |
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jquant1.c One-pass color quantization using a fixed-spacing colormap. |
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jquant2.c Two-pass color quantization using a custom-generated colormap. |
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Also handles one-pass quantization to an externally given map. |
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jdatasrc.c Data source managers for memory and stdio input. |
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Support files for both compression and decompression: |
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jaricom.c Tables for common use in arithmetic entropy encoding and |
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decoding routines. |
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jerror.c Standard error handling routines (application replaceable). |
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jmemmgr.c System-independent (more or less) memory management code. |
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jutils.c Miscellaneous utility routines. |
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jmemmgr.c relies on a system-dependent memory management module. The IJG |
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distribution includes the following implementations of the system-dependent |
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module: |
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jmemnobs.c "No backing store": assumes adequate virtual memory exists. |
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jmemansi.c Makes temporary files with ANSI-standard routine tmpfile(). |
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jmemname.c Makes temporary files with program-generated file names. |
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jmemdos.c Custom implementation for MS-DOS (16-bit environment only): |
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can use extended and expanded memory as well as temp files. |
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jmemmac.c Custom implementation for Apple Macintosh. |
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Exactly one of the system-dependent modules should be configured into an |
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installed JPEG library (see install.txt for hints about which one to use). |
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On unusual systems you may find it worthwhile to make a special |
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system-dependent memory manager. |
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Non-C source code files: |
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jmemdosa.asm 80x86 assembly code support for jmemdos.c; used only in |
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MS-DOS-specific configurations of the JPEG library. |
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CJPEG/DJPEG/JPEGTRAN |
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==================== |
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Include files: |
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cdjpeg.h Declarations shared by cjpeg/djpeg/jpegtran modules. |
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cderror.h Additional error and trace message codes for cjpeg et al. |
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transupp.h Declarations for jpegtran support routines in transupp.c. |
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C source code files: |
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cjpeg.c Main program for cjpeg. |
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djpeg.c Main program for djpeg. |
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jpegtran.c Main program for jpegtran. |
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cdjpeg.c Utility routines used by all three programs. |
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rdcolmap.c Code to read a colormap file for djpeg's "-map" switch. |
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rdswitch.c Code to process some of cjpeg's more complex switches. |
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Also used by jpegtran. |
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transupp.c Support code for jpegtran: lossless image manipulations. |
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Image file reader modules for cjpeg: |
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rdbmp.c BMP file input. |
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rdgif.c GIF file input (now just a stub). |
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rdppm.c PPM/PGM file input. |
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rdrle.c Utah RLE file input. |
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rdtarga.c Targa file input. |
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Image file writer modules for djpeg: |
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wrbmp.c BMP file output. |
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wrgif.c GIF file output (a mere shadow of its former self). |
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wrppm.c PPM/PGM file output. |
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wrrle.c Utah RLE file output. |
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wrtarga.c Targa file output. |
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RDJPGCOM/WRJPGCOM |
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================= |
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C source code files: |
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rdjpgcom.c Stand-alone rdjpgcom application. |
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wrjpgcom.c Stand-alone wrjpgcom application. |
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These programs do not depend on the IJG library. They do use |
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jconfig.h and jinclude.h, only to improve portability. |
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ADDITIONAL FILES |
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================ |
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Documentation (see README for a guide to the documentation files): |
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README Master documentation file. |
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*.txt Other documentation files. |
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*.1 Documentation in Unix man page format. |
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change.log Version-to-version change highlights. |
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example.c Sample code for calling JPEG library. |
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Configuration/installation files and programs (see install.txt for more info): |
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configure Unix shell script to perform automatic configuration. |
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configure.ac Source file for use with Autoconf to generate configure. |
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ltmain.sh Support scripts for configure (from GNU libtool). |
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config.guess |
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config.sub |
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depcomp |
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missing |
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ar-lib |
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compile |
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install-sh Install shell script for those Unix systems lacking one. |
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Makefile.in Makefile input for configure. |
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Makefile.am Source file for use with Automake to generate Makefile.in. |
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ckconfig.c Program to generate jconfig.h on non-Unix systems. |
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jconfig.txt Template for making jconfig.h by hand. |
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mak*.* Sample makefiles for particular systems. |
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jconfig.* Sample jconfig.h for particular systems. |
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libjpeg.map Script to generate shared library with versioned symbols. |
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aclocal.m4 M4 macro definitions for use with Autoconf. |
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Test files (see install.txt for test procedure): |
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test*.* Source and comparison files for confidence test. |
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These are binary image files, NOT text files.
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