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ffmpeg / libavcodec / snow.c @ b6204677

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# Date Author Comment
bb270c08 12/22/2005 01:10 AM Diego Biurrun

COSMETICS: tabs --> spaces, some prettyprinting

Originally committed as revision 4764 to svn://svn.ffmpeg.org/ffmpeg/trunk

daba69b2 12/19/2005 06:26 PM Michael Niedermayer

10l

Originally committed as revision 4758 to svn://svn.ffmpeg.org/ffmpeg/trunk

115329f1 12/17/2005 06:14 PM Diego Biurrun

COSMETICS: Remove all trailing whitespace.

Originally committed as revision 4749 to svn://svn.ffmpeg.org/ffmpeg/trunk

4393e639 12/03/2005 02:20 PM Michael Niedermayer

check block_max_depth (fixes crash)

Originally committed as revision 4718 to svn://svn.ffmpeg.org/ffmpeg/trunk

91aa4e33 12/03/2005 03:07 AM Michael Niedermayer

make selftest code compile again

Originally committed as revision 4717 to svn://svn.ffmpeg.org/ffmpeg/trunk

62ab0b78 09/21/2005 11:09 PM Aurelien Jacobs

fix unused variable warnings

Originally committed as revision 4609 to svn://svn.ffmpeg.org/ffmpeg/trunk

cc884a35 08/21/2005 10:17 PM Michael Niedermayer

reducing minimum supported picture size

Originally committed as revision 4535 to svn://svn.ffmpeg.org/ffmpeg/trunk

9cd81798 05/08/2005 08:15 PM Michael Niedermayer

#defines for strict_std_compliance and split between inofficial extensions and non standarized things

Originally committed as revision 4205 to svn://svn.ffmpeg.org/ffmpeg/trunk

644a9262 04/25/2005 06:29 PM Michael Niedermayer

PIX_FMT_NONE and related fixes

Originally committed as revision 4161 to svn://svn.ffmpeg.org/ffmpeg/trunk

66b32bf2 04/25/2005 10:03 AM Yartrebo

tighter snow slicing patch by (Yartrebo || yartrebo earthlink net)

Originally committed as revision 4159 to svn://svn.ffmpeg.org/ffmpeg/trunk

160d679c 04/24/2005 05:21 PM Mike Melanson

Ministry of English Composition, reporting for duty (and the word is "skipped", not "skiped"; "skiped" would rhyme with "hyped")

Originally committed as revision 4153 to svn://svn.ffmpeg.org/ffmpeg/trunk

8c2515bb 04/17/2005 09:27 AM Yartrebo

fix overflow in mc_block() patch by (Yartrebo )yartrebo earthlink net

Originally committed as revision 4132 to svn://svn.ffmpeg.org/ffmpeg/trunk

b44985ba 04/15/2005 01:24 PM Michael Niedermayer

store the number of runs to avoid storing the last run value
about 10% lower bitrate for -qscale 32 (forman & some music video)
worst case bitrate increase <0.1% (lossless or low qscale)
and now the bad news, even though this just adds a single subtraction and an if() into the medium sized unpack_coeffs() loop and the if() will only be false once per unpac_coeff() call, gcc produces 50% slower code, i didnt look at the generated asm yet, not sure if i want to ......

2cd34043 04/15/2005 05:54 AM Loren Merritt

allow 2pass ratecontrol. also fixes psnr displayed by mencoder.

Originally committed as revision 4130 to svn://svn.ffmpeg.org/ffmpeg/trunk

cbb1d2b1 04/14/2005 08:54 PM Michael Niedermayer

replace complicated pointer dereference + index stuff by pointers in unpack_coeffs()

Originally committed as revision 4129 to svn://svn.ffmpeg.org/ffmpeg/trunk

99cd59e5 04/14/2005 08:30 PM Michael Niedermayer

minor optimization

Originally committed as revision 4128 to svn://svn.ffmpeg.org/ffmpeg/trunk

3c096ac7 04/14/2005 06:33 PM Michael Niedermayer

optimizing unpack_coeffs()

Originally committed as revision 4127 to svn://svn.ffmpeg.org/ffmpeg/trunk

86e59cc0 04/13/2005 01:57 AM Yartrebo

Snow segfault bug in revision 1.43 patch by (Yartrebo /yartrebo earthlink net/)

Originally committed as revision 4126 to svn://svn.ffmpeg.org/ffmpeg/trunk

f5a71928 04/10/2005 02:21 PM Michael Niedermayer

rescale coefficients during IDWT, that way the lifting steps are much simpler and faster

Originally committed as revision 4119 to svn://svn.ffmpeg.org/ffmpeg/trunk

a0a74ad9 04/09/2005 10:15 PM Michael Niedermayer

increasing precission of the quantization parameter
this is needed as the quantization stepsize for each subband is also in this precission and insignificant changes to the wavelet like scaling its coefficients slightly differently would lead to wildly variing PSNR and bitrate...

c97de57c 04/09/2005 07:48 PM Michael Niedermayer

fix QROOT != 8

Originally committed as revision 4114 to svn://svn.ffmpeg.org/ffmpeg/trunk

538a3841 04/05/2005 05:59 PM Michael Niedermayer

10% faster unpack_coeffs

Originally committed as revision 4108 to svn://svn.ffmpeg.org/ffmpeg/trunk

3cff4572 04/05/2005 09:37 AM Michael Niedermayer

fixing lossless snow

Originally committed as revision 4107 to svn://svn.ffmpeg.org/ffmpeg/trunk

565a45ac 04/04/2005 09:35 PM Michael Niedermayer

merge vertical lifting steps and a little cleanup

Originally committed as revision 4104 to svn://svn.ffmpeg.org/ffmpeg/trunk

a0d1931c 04/03/2005 03:43 PM Yartrebo

Snow Slicing patch by (Yartrebo) yartrebo earthlink net

Originally committed as revision 4101 to svn://svn.ffmpeg.org/ffmpeg/trunk

f9e6ebf7 03/15/2005 09:05 PM Loren Merritt

slice-based idwt (10% faster decoding)

Originally committed as revision 4040 to svn://svn.ffmpeg.org/ffmpeg/trunk

53513831 02/24/2005 04:39 PM Michael Niedermayer

-strict -1 comment fix

Originally committed as revision 3976 to svn://svn.ffmpeg.org/ffmpeg/trunk

934982c4 01/23/2005 06:09 PM Michael Niedermayer

avoid buf_size == 0 checks in every decoder

Originally committed as revision 3872 to svn://svn.ffmpeg.org/ffmpeg/trunk

d06c75a8 01/16/2005 10:11 PM Matthieu Castet

10l patch by (matthieu castet <castet.matthieu free fr>)

Originally committed as revision 3842 to svn://svn.ffmpeg.org/ffmpeg/trunk

0ecca7a4 01/12/2005 12:16 AM Michael Niedermayer

various security fixes and precautionary checks

Originally committed as revision 3822 to svn://svn.ffmpeg.org/ffmpeg/trunk

8ff53f5b 01/03/2005 04:13 PM Gianluigi Tiesi

Disable encoders patch by (Gianluigi Tiesi <mplayer netfarm it>)

Originally committed as revision 3797 to svn://svn.ffmpeg.org/ffmpeg/trunk

2554db9b 11/25/2004 07:26 PM Michael Niedermayer

fix for build on IRIX by (Michel Bardiaux {mbardiaux peaktime be})

Originally committed as revision 3713 to svn://svn.ffmpeg.org/ffmpeg/trunk

28869757 10/30/2004 02:16 AM Michael Niedermayer

CABAC -> range coder

Originally committed as revision 3655 to svn://svn.ffmpeg.org/ffmpeg/trunk

d7d51926 09/24/2004 06:12 PM Michael Niedermayer

unused

Originally committed as revision 3502 to svn://svn.ffmpeg.org/ffmpeg/trunk

715a97f0 09/23/2004 12:20 PM Michael Niedermayer

merge predict_plane() with DWTELEM->8bit conversation (21% faster)

Originally committed as revision 3499 to svn://svn.ffmpeg.org/ffmpeg/trunk

034aff03 09/21/2004 11:10 PM Michael Niedermayer

8 -> FRAC_BITS

Originally committed as revision 3489 to svn://svn.ffmpeg.org/ffmpeg/trunk

aa25a462 09/19/2004 02:43 PM D Richard Felker III

consistent use of types patch by (D Richard Felker III <dalias at aerifal dot cx>)

Originally committed as revision 3480 to svn://svn.ffmpeg.org/ffmpeg/trunk

7c2425d2 09/17/2004 11:51 PM Loren Merritt

simplify getsymbol patch by (Loren Merritt <lorenm at u dot washington dot edu>)

Originally committed as revision 3476 to svn://svn.ffmpeg.org/ffmpeg/trunk

bd368b56 09/15/2004 01:55 AM Michael Niedermayer

per picture psnr

Originally committed as revision 3465 to svn://svn.ffmpeg.org/ffmpeg/trunk

d92b5807 09/12/2004 11:09 PM Michael Niedermayer

100l (forgot to set the 8x8 mc functions, so ME did use the mpeg ones ...)

Originally committed as revision 3456 to svn://svn.ffmpeg.org/ffmpeg/trunk

ec697587 09/12/2004 09:32 PM Michael Niedermayer

use h264 MC code if possible
50% faster predict_plane() if mmx2/3dnow is available
0.1% bitrate increase

Originally committed as revision 3455 to svn://svn.ffmpeg.org/ffmpeg/trunk

3924dac4 09/12/2004 10:51 AM Michael Niedermayer

use pointer arithmetic in mc_block(), 25% faster

Originally committed as revision 3452 to svn://svn.ffmpeg.org/ffmpeg/trunk

ff158dc9 09/05/2004 09:46 PM Michael Niedermayer

20% faster predict_plane()
moion vector max/min fix

Originally committed as revision 3434 to svn://svn.ffmpeg.org/ffmpeg/trunk

19aa028d 08/31/2004 04:28 PM Michael Niedermayer

10l (keyframes and context resets)

Originally committed as revision 3426 to svn://svn.ffmpeg.org/ffmpeg/trunk

39c61bbb 08/28/2004 02:24 PM Michael Niedermayer

cleanup

Originally committed as revision 3425 to svn://svn.ffmpeg.org/ffmpeg/trunk

fff6d4ea 08/28/2004 02:08 PM Michael Niedermayer

10l
more benchmarking code
inline

Originally committed as revision 3424 to svn://svn.ffmpeg.org/ffmpeg/trunk

ea7d9cd4 08/27/2004 09:16 PM Michael Niedermayer

merge decode_subband() and dequantize()

Originally committed as revision 3422 to svn://svn.ffmpeg.org/ffmpeg/trunk

ff765159 08/27/2004 08:33 PM Michael Niedermayer

11% faster decode_subband()

Originally committed as revision 3421 to svn://svn.ffmpeg.org/ffmpeg/trunk

0cea8a03 08/27/2004 08:15 PM Michael Niedermayer

5% faster decode_subband()
a little cleanup

Originally committed as revision 3420 to svn://svn.ffmpeg.org/ffmpeg/trunk

7b49c309 08/27/2004 07:52 PM Michael Niedermayer

46% faster decode_subband()

Originally committed as revision 3419 to svn://svn.ffmpeg.org/ffmpeg/trunk

3c1adccd 08/27/2004 01:06 AM Michael Niedermayer

50% faster decode_subband()

Originally committed as revision 3418 to svn://svn.ffmpeg.org/ffmpeg/trunk

155ec6ed 08/26/2004 08:04 PM Michael Niedermayer

quad tree based motion compensation (currently only 16x16 & 8x8 OBMC blocks, but can be extended to other block sizes easily)
different intra block coding (previous was just an ugly hack)
1.8% bitrate reduction -0.01PSNR (foreman@352x288 qscale=8)
1.5% bitrate reduction +0.05PSNR (foreman@352x288 qscale=1)...

64886072 08/25/2004 12:26 AM Michael Niedermayer

edge bugfix
1-1.3% lower bitrate and +0.01 PSNR (foremen@352x288 qscale=1,8)

Originally committed as revision 3414 to svn://svn.ffmpeg.org/ffmpeg/trunk

46c281e8 08/03/2004 02:34 AM Michael Niedermayer

cleanup

Originally committed as revision 3377 to svn://svn.ffmpeg.org/ffmpeg/trunk

93fbdb5a 08/02/2004 07:09 PM Michael Niedermayer

lossless support

Originally committed as revision 3374 to svn://svn.ffmpeg.org/ffmpeg/trunk

3bb9f096 08/02/2004 06:01 PM Michael Niedermayer

cleanup

Originally committed as revision 3373 to svn://svn.ffmpeg.org/ffmpeg/trunk

0635cbfc 08/02/2004 05:53 PM Michael Niedermayer

improved magnitude coding, 0.2% lower bitrate (foreman@352x288 qscale 1 and 8)

Originally committed as revision 3372 to svn://svn.ffmpeg.org/ffmpeg/trunk

bc68bfdd 08/02/2004 01:06 AM Michael Niedermayer

cleanup

Originally committed as revision 3367 to svn://svn.ffmpeg.org/ffmpeg/trunk

4f4e9633 08/02/2004 01:03 AM Michael Niedermayer

various subband encoders (all either worse or complicated so they are commented out)
different 0-context encoding, 1.2% lower bitrate (foreman@352x288 qscale=8) no significant change at qscale=1

Originally committed as revision 3366 to svn://svn.ffmpeg.org/ffmpeg/trunk

620ab797 07/28/2004 01:35 AM Michael Niedermayer

1/0 fix

Originally committed as revision 3357 to svn://svn.ffmpeg.org/ffmpeg/trunk

2ff9ff5b 07/28/2004 12:09 AM Michael Niedermayer

dont segfault without -strict -1

Originally committed as revision 3356 to svn://svn.ffmpeg.org/ffmpeg/trunk

da66b631 07/27/2004 05:38 PM Michael Niedermayer

optimize quantizaton (about 3x faster)
further opt is easily possible but could lead to overflows depening upon coefficient range, so this wont be done yet as it would make the code somewhat less flexible

Originally committed as revision 3354 to svn://svn.ffmpeg.org/ffmpeg/trunk

a8d73e56 07/27/2004 05:02 PM Michael Niedermayer

cleanup
remove ugly and slow vertical scaning code
0.1% bitrate increase (foreman@352x288 qp=1)
0.3% bitrate increase (foreman@352x288 qp=8)

Originally committed as revision 3353 to svn://svn.ffmpeg.org/ffmpeg/trunk

78486403 07/27/2004 01:40 PM Michael Niedermayer

use parent sample to predict significance & magnitude
1% bitrate reduction (foreman@352x288 qscale 1 & 8)

Originally committed as revision 3352 to svn://svn.ffmpeg.org/ffmpeg/trunk

e071139a 07/27/2004 09:44 AM Michael Niedermayer

log2() & bsd

Originally committed as revision 3350 to svn://svn.ffmpeg.org/ffmpeg/trunk

6b2f6646 07/27/2004 01:30 AM Michael Niedermayer

better context model (0.2-1% lower bitrate)
a tiny bit cleanup

Originally committed as revision 3348 to svn://svn.ffmpeg.org/ffmpeg/trunk

de890c9b 07/26/2004 01:31 PM Michael Niedermayer

typo

Originally committed as revision 3342 to svn://svn.ffmpeg.org/ffmpeg/trunk

791e7b83 07/25/2004 11:36 PM Michael Niedermayer

my experimental wavelet codec
note, this is far from finished, dont expect todays encodings to be decodeable with cvs tomorrow ...

Originally committed as revision 3341 to svn://svn.ffmpeg.org/ffmpeg/trunk