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Changes chronology
------------------
1.5b Release August 1995
- added date to default USER_DATA string
- made prototypes happier
- renamed SPECIFICS_FILE to CDL_FILE
- fixed bit_rate param in constrained param setting (was too restrictive)
- fixed obscure P-block motion vector bug
- added a file name replication:
foo.ppm [1-10] will make 10 copies of foo.ppm
- generalized fopen calls to specify binary mode (MSDOG)
- generalized times calls into elapsed_time to handle different library routines
- fixed motion vector bug in bframes; skip block bug
- fixed minor bugs in parallel, mpeg, main, iframe, param, ....
- accepts extra whitespace at the end of lines in parameter files
- "PIXEL FULL" bug in B-frames fixed (caused ghosting)
- B-blocks "can I skip" rutine now looks at color too (more ghosting problems)
- switched from JPEG4 to JPEG5 (if they crash for you,
do a -DJPEG4 for the encoder, and get jpeg4.tar.gz off our site)
- combine server (parallel) waits longer for files to exist (
thanks to apian@ise.fhg.de)
- killing the parallel server kills the clients!!!! (apian@ise.fhg.de)
1.5 Release 8 May 1995 Changes since version 1.3 release (to 1.5)
= BUG FIXES
- removed SetBlocksPerSlice() from GOPStoMPEG
- don't access bb after freeing
- non-integer frame rates now work for all machines
- fixed parsing of -mv_histogram
- fixed numPadding bug (file name problem)
- fixed full pixel assertation bug
- corrected ASPECT_RATIO bug (was forced to 1)
- buffer size is now set correctly
- complains when file is too small
- fixed bug with non-ranged INPUT_FILE names
- forced MB at start/end of slice in P-frame bug fixed
- Actually evaluates the constrained parameter settings
- fixed a Cr/Cb mixup in bframe.c
= NEW FEATURES
- rate control
- optional B search range different from P range
- can read images from stdin, allowing encoding on-the-fly
- Does Y files (no U or V)
- New way of specifying files `cmd`, like `ls jan-*-94`
- Can encode Abekas and Phillips style YUV formats
- gamma correction
- added -realquiet mode
- JMOVIE and JPEGv4 input format fully supported
- -float_dct uses the (slower) double precision floating point DCT
- automatically identifies itself in (sequence header) userdata
- enforced [0][0] entry of Intra Q-table to be 8
- added Jim Boucher's resize code
- added -mse flag to print mean squared error on a per-block basis
- can specify Sequence header user data
- prints version number
- finds more skip blocks in GenBFrame
- can generate multiple sequence headers (every N GOPs)
= SPEED IMPROVEMENTS
= MAINTENANCE
- removed mpeg_jrevdct_sparse(), since it wasn't used
- added CompileTests();
- uses libpnmrw rather than entire pbmplus directory
- redid RCS
- reorganized [ipb]frame.c to make playing with rate controls easier
= PORTABILITY
- added #ifdef's, #ifndef's LINUX'es to ease porting
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
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