[XviD-devel] minor changes / todo list

[Arvind Raman]

Could not really understand the teminology / issue
being discussed here
What do you mean when u say 
bframes >=2 SMP support

Arvind

> -----Original Message-----
> From: suxen_drol [mailto:suxen_drol at hotmail.com]
> Sent: Thursday, June 12, 2003 7:22 PM
> To: xvid-devel at xvid.org
> Subject: [XviD-devel] minor changes / todo list
> 
> 
> hi,
> 
> there are some minor changes i'd like to implement
in 
> dev-api-4, however
> this may step on the work (or opinions) of others.
> 
> - in enc_create() set all ptrs initial to NULL, so
we can go:
>      if (malloc()==NULL) return enc_destroy()
>   instead of having all those goto's.
> 
> - remove XVID_TYPE_S from api, such that encoding 
> applications only deal with
>   I,P and B frames types.
>   this means the plugins can assume that data->type
is in the 
> range (-infinity,3]
> 
> - consider reworking the adapt quant plugin
semantics, to 
> specify an arbitrary
>   "quantization strength" unit for each macroblock,
and make 
> the encoder
>    responsible for converting/normalizing these
units into dquants.
>   the adapt quant plugin currently returns the array
of 
> dquants, which i think is bad,
>   if a plugin later on the the plugins array decides
to 
> change the frame quantizer.
> 
> - (ed as previously suggested) consider moving
"min/max_quant" and
> "zones array" to individual plugins, rather than
mainting these at the
> encoder level (the encoder need not be aware of
quantizer restrictions
> or zones). though, this will mean the plugins have
to 
> allocate their own
> zone arrays.
> 
> and to keep anyone/everyone updated on xvid
progress, ive included my
> rough todo list below. ed suggested some time ago a 
> NO_DYNAMIC_FRAMETYPE_DECISION
> flag, but resolved the issue by fixing a 2pass2 bug
(caused 
> by me...), thanks!
> 
> cheers,
> -- pete
> 
> BUGS
> * greyscale mode leaving green smudges?
> * xvid decoder upside down in nero vcd encoder?
> * RGB->YV12 chroma sampling bug; do not average
chroma
> * yuv->rgb mmx, yellow line
> * custom MPEG quant matrix uses static varibles
> * perform extensible bounds checking; valgrind
> 
> XVIDCORE
> * by default, do not insert multiple VOS,VO,VOL.
> * move min_key_frame to xvidcore (or scrap
completely?)
> * import fast qpel/b-frames from head branch?
> * expand user_start_code version info?
> * simple at l0 compatiblity: force f_code=1, 
> intra_dc_vlc_threshold=0, toggle acpred. 
> * move the profiles/level array into xvidcore?
> * intra_dc_vlc_threshold
> * vbv plugin
> * dynamic reduced resolution vops
> * bframes cutsom_quant
> * bframes lumimasking
> * bframes>=2 SMP support
> * re-implement internal timer using function ptr
wrappers
> * encoder struct marshalling, such that we can
pause/resume encoding
> * XVID_ENC_REENCODE; re-encoded current frame with
different quantizer
> 
> XVIDCORE/PRE-FILTERS
> * XVID_TVOUT; lum_offset = -2
> * chroma interpolation (blur chroma plane)
> * cartoon mode?
> 
> XVIDCORE/DCT
> * inter 132 colocated mb refresh
> * zero idct coeff clause
> * support multiple idcts?
> 
> XVIDCORE/IMAGE
> * colorspace mmx patches/optimizations; yuv to rgb
15/16 mmx code
> * increase precision of yuv to rgb transformation?
> * blocked-based edge mirrorring?
> 
> XVIDCORE/ME
> * full gmc
> * optimize getpmv
> * investigate "good" field-based motion estimation
methods
> * dynamic bframes fcode/bcode decision
> 
> XVIDCORE/2PASS
> * refine 2pass statistics format; make it extendible
> * fix /*XXX*/ sections in plugin_2pass2.c
> * 2pass qpel decision
> * resolve bframes scaling issues.
> 
> XVIDCORE/DECODER
> * cleanup bframe mb_decoding functions
> * proper slice decoding support
> 
> XVIDCORE/POSTFILTERING
> * post processing; or atleast decoder quant_table[]
for 
> mplayer postproc
> * video equalizer.
> * mmx 16x16,32x32 transfer functions
> 
> FRONTENDS/VFW
> * cleanup zone stuff; the ui needs fool-proofing
> 
> FRONTENDS/DSHOW
> * IDirectDrawMedaStream::GetFormat returns
E_NO_STREAM
> * check xvid dshow again avisynth 2.5x
> * directshow encoding filter?
> 
> FRONTENDS/QT
> * import quicktime frontend into cvs & clean up
> * add proper encoding support/gui
> 
> 
> 
> _______________________________________________
> XviD-devel mailing list
> XviD-devel at xvid.org
> http://list.xvid.org/mailman/listinfo/xvid-devel
> 

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