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-This archive contains a quick & dirty implementation of the IEEE Standard
-1180-1990 accuracy test for inverse DCT. It is not guaranteed to be
-correct ... but if you find any bugs, please let me know (by email to
-tgl@cs.cmu.edu).
-
-The test harness consists of the C program ieeetest.c and shell script
-doieee. For comparison purposes I have also supplied a copy of jrevdct.c,
-the inverse DCT routine from release 4 of the Independent JPEG Group's
-free JPEG software. (jrevdct.c is slightly modified from the IJG release
-so that it will compile without the IJG include files.) jrevdct.c passes
-the 1180 test --- or at least, this program thinks so. jrevdct.out is
-the output from a test run.
-
-Note that numerical results may vary somewhat across machines. This appears
-to be mostly due to differing results from the cosine function.
-
-
-INSTALLATION:
- Check the Makefile, change CC and CFLAGS if needed. Then say "make".
-If your C compiler is non-ANSI, you may need to change includes and/or
-function headers.
-
- To test a different IDCT routine, link with that routine instead of
-jrevdct.o. You will need to modify dct.h and/or ieeetest.c if your
-routine's calling convention is not in-place modification of an array
-of 64 "short"s.
-
-
-USAGE:
- The standard test procedure is
- doieee ieeetest >outputfile
-Expect it to take a while (almost 80 minutes on my old 68030 box).
-Each of the six passes will emit a row of 100 dots as it runs.
-
-You can grep the output for the word FAILS if you just want to know
-yea or nay.
-
-
-LEGAL MUMBO-JUMBO:
- I hereby release the test harness to the public domain.
- Thomas G. Lane, 22 Nov 1993
-
-IMPORTANT: jrevdct.c is NOT public domain, but is copyrighted free software
-(not the same thing at all). It is subject to IJG's distribution terms, which
-primarily state that if you incorporate it into a program you must acknowledge
-IJG's contribution in your program documentation. For more details and the
-complete IJG software, see the IJG FTP archive at ftp.uu.net, in directory
-/graphics/jpeg.