ryan/mozjpeg
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

The Independent JPEG Group's JPEG software v5

Browse Source
This commit is contained in:
Thomas G. Lane
1994-09-24 00:00:00 +00:00
committed by DRC
parent cc7150e281
commit 36a4ccccd3
141 changed files with 30726 additions and 17773 deletions
Download Patch File Download Diff File Expand all files Collapse all files

42
jcarith.c
View File

@@ -1,42 +0,0 @@
/*
* jcarith.c
*
* Copyright (C) 1991, 1992, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file contains arithmetic entropy encoding routines.
* These routines are invoked via the methods entropy_encode,
* entropy_encode_init/term, and entropy_optimize.
*/
#include "jinclude.h"
#ifdef C_ARITH_CODING_SUPPORTED
/*
* The arithmetic coding option of the JPEG standard specifies Q-coding,
* which is covered by patents held by IBM (and possibly AT&T and Mitsubishi).
* At this time it does not appear to be legal for the Independent JPEG
* Group to distribute software that implements arithmetic coding.
* We have therefore removed arithmetic coding support from the
* distributed source code.
*
* We're not happy about it either.
*/
/*
* The method selection routine for arithmetic entropy encoding.
*/
GLOBAL void
jselcarithmetic (compress_info_ptr cinfo)
{
if (cinfo->arith_code) {
ERREXIT(cinfo->emethods, "Sorry, there are legal restrictions on arithmetic coding");
}
}
#endif /* C_ARITH_CODING_SUPPORTED */