Changes chronology
------------------

1.3 Release	14 March 1994

Changes from 1.2 to 1.3
-----------------------
= BUG FIXES
	+ deletes frame files when done with them in parallel version
	+ fixed bug in ComputeFrameTable
	+ completion time estimation now is closer to actual time
	+ modified ComputeSNR to avoid overflow of varOrig
	+ fixed bug that caused I/P/B times on HP's to be wrong
	+ fixed bug that made TwoLevel search out of the search window
	+ fixed bug in -quiet 0
	+ fixed memory leak when using PNM files
	+ fixed bug:  crashed when CPU time was 0 (very rare)
	+ fixed bug in -gop option
	+ fixed bug in AppendFiles()

= NEW FEATURES
	+ added FORCE_ENCODE_LAST_FRAME option (allows encoding of all frames)
	+ added PARALLEL_CHUNK_TAPER option
	+ added -bit_rate_info option to show bit rate per frame
	+ added -mv_histogram option to show motion vector histogram
	+ custom quantization tables allowed
	+ can specify frame rate, aspect ratio

= SPEED IMPROVEMENTS
	+ replaced most remaining binary multiplies/divides with shifts
		(except those concerning negative numbers)

= MAINTENANCE
	+ got rid of & before array warning in block.c
	+ got rid of references to srandom, random in pbmplus.h
	+ undefine 'index' if defined as 'strchr' (since we use index as
	  variable name)
	+ modified frame type code to be more flexible

= PORTABILITY
	+ replaced all bzero() calls with memset() calls


1.2 Release	20 October 1993

Changes from 1.1 to 1.2
-----------------------
= BUG FIXES
	+ allow comments in PPM files
	+ first and last macroblocks in a slice may not be skipped macroblocks
	+ fixed YUV bug:  should be able to handle dimensions which
		aren't multiples of 16
	+ fixed the separate I/O conversion for parallel NFS version
	+ no_frame_summary can now be last option

= NEW FEATURES
	+ using DECODED frames as reference frames in parallel
	  version now works
	+ implemented multiple I/O Servers
	+ FORCE_I_ALIGN added
	+ reorganized Server structure slightly (only I/O Servers
	  handle individual frame files on disk)
	+ add option to allow exact division of frames per processor
	  (PARALLEL_PERFECT)

= SPEED IMPROVEMENTS
	+ don't start Input server if not needed

= MAINTENANCE
	+ got rid of niceProcesses line in main.c
	+ changed write() to SafeWrite() in parallel.c
	+ commented stuff out after #endif's
	+ fixed prototype warnings (eliminated non-4-byte args)


1.1 Release	August 1993

Changes from 1.0 to 1.1
-----------------------
= BUG FIXES
	+ fixed bug in parallel Server code which didn't htonl() frame
	  numbers correctly (so it didn't work on little-endian machines)
	+ fixed bug -- B-frames were always getting just 1 slice
	+ fixed listen() to use max connections allowed
	+ fixed noparallel.c so it doesn't complain during non-parallel
	  execution

= NEW FEATURES
	+ added level-2 p-search (exhaustive full, then half)
	+ now prints signal-to-noise ratio
	+ parallel code complains if absolute path not used for parameter
	  file
	+ changed single I/O server into separate Input and Output Servers
	  (and have Output Server combine frames in parallel)

= SPEED IMPROVEMENTS
	+ slight improvement in Mpost_QuantZigBlock (.10 ms/call down to .08 ms
	  on Sparc-10)
	+ improvement in speed of BlockifyFrame (45.8 ms/call down to 21.2 ms)
	+ improvement in ComputeMotionBlock (0.02 ms/call down to 0.01 ms)
	+ improvement in ComputeMotionLumBlock (0.04 ms/call down to 0.02 ms)
	+ improvement in LumAddMotionError (0.06 ms/call down to 0.05 ms)
		(changed /2 to >>1)
	
= MAINTENANCE
	+ removed most memory.h references (except jrevdct)
	+ added CFLAGS lines in Makefile for SVR4.0 and SGI machines
	+ removed mproto.h
	+ got rid of printing connection times


1.0 Release	July 1993