d72bc32389
unused variable
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Originally committed as revision 6737 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-19 18:22:03 +00:00
ebd624b662
optimize sign decoding code in decode_residual()
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x86 is 4% faster on P3
C sign stuff + x86 code for everything else is also faster then before (sorry forgot to test pure C)
... and if i replace the second occurance of the sign decoding in decode_residual by the asm too then everything gets slower iam starting to think that it might be best to write the whole function in asm, playing this avoid random deoptimizations game with gcc is not fun at all
Originally committed as revision 6732 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-19 01:19:03 +00:00
a0f2c6ba38
Kill a warning with MSVC
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Patch by Jindrich Makovicka makovick A gmail P com
Original thread:
Date: 08:21 AM
Subject Re: [Ffmpeg-devel] Weird line in cabac.h
Originally committed as revision 6726 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-18 09:37:25 +00:00
eb73bf723d
x86 asm version of the decode significance loop (not 8x8) of decode_residual() 5% faster decode_residual() on P3
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Originally committed as revision 6724 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-17 22:18:29 +00:00
4041a495a8
cosmetic (%%eax->%0)
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Originally committed as revision 6717 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-17 09:38:37 +00:00
8dda3e796b
Fix crash with illegal instruction, cmov is available on 686 and later only.
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Originally committed as revision 6715 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-16 21:47:19 +00:00
e962604f1c
Expand some #endif comments.
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Originally committed as revision 6714 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-16 21:22:47 +00:00
165c5f0909
fix !CMOV_IS_FAST case (iam not really happy with the fix but i didnt come up with a better one quickly)
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Originally committed as revision 6707 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-16 11:11:20 +00:00
1d7c111856
10l
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Originally committed as revision 6704 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-15 21:04:10 +00:00
faff3a7ad0
this code will not work with PIC as it needs 7 registers and gcc doesnt support that in PIC
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Originally committed as revision 6703 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-15 20:50:05 +00:00
f24a515931
shift CABACContext.range right, this reduces the number of shifts needed in get_cabac() and is slightly faster on P3 (and should be much faster on P4 as the P4 except the more recent variants lacks an integer shifter and so shifts have ~10 times longer latency then simple operations like adds)
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Originally committed as revision 6702 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-15 20:40:50 +00:00
68a205edef
dehack *ps_state indexing in the branchless decoder
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Originally committed as revision 6683 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-13 14:21:25 +00:00
12ff5b0f3b
add "memory" to the clobber list we change memory so we need it, this also fixes some problems with gcc svn
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Originally committed as revision 6679 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-12 21:32:56 +00:00
851ded8918
prevent "mb level" get_cabac() calls from being inlined (3% faster decode_mb_cabac() on P3)
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Originally committed as revision 6674 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-12 14:49:19 +00:00
a0490b324a
adds some useful comments after some of the #else, #elseif,
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#endif preprocessor directives to make it clearer which code
block depends on which #define xx
Originally committed as revision 6668 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-12 07:51:18 +00:00
c26abfa541
Rename ABS macro to FFABS.
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Originally committed as revision 6666 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-11 23:17:58 +00:00
1f4d5e9f69
slightly faster on P3 slightly slower on athlon and probably faster on P4
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Originally committed as revision 6663 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-11 17:59:40 +00:00
2b5269b51c
moving lps state transition code a little up in the branched asm code (1% faster on P3)
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Originally committed as revision 6658 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-11 16:39:50 +00:00
b99f3cabed
write cabac low and range variables as early as possible to prevent stalls from reading them before they where written, the P4 is said to disslike that alot, on P3 its 2% faster (START/STOP_TIMER over decode_residual)
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Originally committed as revision 6657 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-11 16:11:41 +00:00
d17faef011
use ecx instead of cl (no speed change on P3 but might avoid partial register stalls on some cpus)
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Originally committed as revision 6656 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-11 15:20:08 +00:00
d61c4e731e
make state transition tables global as they are constant and the code is slightly faster that way
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Originally committed as revision 6655 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-11 14:44:17 +00:00
5f3eca121e
10l
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Originally committed as revision 6654 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-11 13:25:29 +00:00
0fa352c7e6
make lps_range a global table its constant anyway (saves 1 addition for accessing it)
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Originally committed as revision 6653 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-11 13:21:42 +00:00
3650b43959
enable CMOV_IS_FAST as its faster or equal speed on every cpu (duron, athlon, PM, P3) from which ive seen benchmarks, it might be slower on P4 but noone has posted benchmarks ...
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Originally committed as revision 6652 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-11 12:23:40 +00:00
0bc2e7f081
BRANCHLESS_CABAD --> BRANCHLESS_CABAC_DECODER
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Originally committed as revision 6623 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-10 08:16:41 +00:00
9ed92c65f1
moving another bit&1 out, this is as fast as with it in there, but it makes more sense with it outside of the loop
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Originally committed as revision 6618 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-10 06:56:51 +00:00
f1b37db48d
move the &1 out of the asm so gcc can optimize it away in inlined cases (yes this is slightly faster)
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Originally committed as revision 6616 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-10 01:17:39 +00:00
ab0151d163
replace a few and/sub/... by cmov
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this is faster on P3, should be faster on AMD, and should be slower on P4
its disabled by default (benchmarks welcome so we know when to enable it)
Originally committed as revision 6615 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-10 01:08:39 +00:00
a6672acf45
reading 8bit mem into a 8bit register needs 2 uops on P4, 8bit->32bit with zero extension needs just 1
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Originally committed as revision 6612 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-09 21:57:10 +00:00
2d3df05ca0
on the P4 inc needs twice as much time a add
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Originally committed as revision 6611 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-09 21:39:07 +00:00
2ee9dc65be
10l
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Originally committed as revision 6610 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-09 21:21:10 +00:00
7822e1c1ff
reverse remainder of the failed attempt to optimize *state=c->mps_state[s]
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Originally committed as revision 6609 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-09 21:14:16 +00:00
ef0090a998
x86 branchless cabac decoder
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slightly faster on P3
Originally committed as revision 6608 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-09 20:51:33 +00:00
2e1aee80f4
optimize branchless C CABAC decoder
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Originally committed as revision 6607 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-09 20:44:11 +00:00
1c2a417f6a
move outcommented START/STOP_TIMER to a hopefully better place for benchmarking ...
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Originally committed as revision 6605 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-09 18:20:00 +00:00
30dc5f56ad
drop failed attempt to optimize *state= c->mps_state[s];
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Originally committed as revision 6604 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-09 15:52:17 +00:00
c56d23dacf
10l bugfix for some disabled code
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Originally committed as revision 6603 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-09 14:15:53 +00:00
f7d0b68361
first try of a handwritten get_cabac() for x86, this is 10-20% faster on P3 depening on if you try to subtract the START/STOP_TIMER overhead
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Originally committed as revision 6602 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-09 14:15:14 +00:00
5bbe2a5292
remove bytestream_end checks, seems to work fine without them and the bitstream reader doesnt check for the end either
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Originally committed as revision 6599 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-09 12:25:24 +00:00
c010d69a75
decrease ff_h264_norm_shift[] size
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Originally committed as revision 6596 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-09 00:59:42 +00:00
6ff042699f
cleanup
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Originally committed as revision 6594 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-08 21:26:08 +00:00
260ceb6322
branchless renormalization (1% faster get_cabac) old branchless renormalization wasnt faster because gcc was scared of the shift variable (missusing bit variable now)
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Originally committed as revision 6587 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-08 13:20:22 +00:00
99ce10873d
5% faster get_cabac()
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Originally committed as revision 6586 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-08 11:24:37 +00:00
400d0f8e47
disable benchmarking code
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disable asm optims as the fastest depends on cpu type
Originally committed as revision 6582 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-07 22:37:34 +00:00
4310580db5
renorm_cabac_decoder_once START/STOP_TIMER scores for athlon
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Originally committed as revision 6581 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-07 22:34:32 +00:00
5659b509c7
refill cabac variables in 16bit steps, 3% faster get_cabac()
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Originally committed as revision 6578 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-07 15:44:14 +00:00
b78e7197a8
Change license headers to say 'FFmpeg' instead of 'this program/this library'
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and fix GPL/LGPL version mismatches.
Originally committed as revision 6577 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-07 15:30:46 +00:00
2ae7569dc8
() 10l
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Originally committed as revision 6576 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-07 12:41:55 +00:00
ec8f483ab5
several x86 renorm_cabac_decoder_once optimizations
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START/STOP_TIMER benchmarking code for them
please benchmark on P4 & athlon
(ill remove the benchmarking code and the always slower variants as soon as p4/athlon benchmarks have been posted or commited)
Originally committed as revision 6573 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-07 11:15:10 +00:00
938dd84693
don't try to inline cabac functions. gcc ignored the hint anyway, and forcing it would make h264 slower.
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Originally committed as revision 6549 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-04 07:16:10 +00:00
bfe328caf0
tweak cabac. 0.5% faster h264.
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Originally committed as revision 6106 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-08-27 09:19:02 +00:00
2848ce84d2
don't force asserts in release builds. 2% faster h264.
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Originally committed as revision 5332 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-04-29 00:43:15 +00:00
5509bffa88
Update licensing information: The FSF changed postal address.
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Originally committed as revision 4842 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-01-12 22:43:26 +00:00
115329f160
COSMETICS: Remove all trailing whitespace.
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Originally committed as revision 4749 to svn://svn.ffmpeg.org/ffmpeg/trunk
2005-12-17 18:14:38 +00:00
6d1feb028f
decode h264 end-of-slice flag
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Originally committed as revision 4316 to svn://svn.ffmpeg.org/ffmpeg/trunk
2005-05-29 18:18:13 +00:00
88730be651
kill warnings patch by (Måns Rullgård <mru inprovide com>)
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Originally committed as revision 3977 to svn://svn.ffmpeg.org/ffmpeg/trunk
2005-02-24 19:08:50 +00:00
ec7eb8966c
optimization
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Originally committed as revision 3639 to svn://svn.ffmpeg.org/ffmpeg/trunk
2004-10-26 03:12:21 +00:00
bba8334965
overread fix
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Originally committed as revision 3294 to svn://svn.ffmpeg.org/ffmpeg/trunk
2004-07-08 00:53:21 +00:00
e96682e6f4
some of the warning fixes by (Michael Roitzsch <mroi at users dot sourceforge dot net>)
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Originally committed as revision 3140 to svn://svn.ffmpeg.org/ffmpeg/trunk
2004-05-18 17:09:46 +00:00
b46243ed1c
get_bit_count -> put_bits_count
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Originally committed as revision 2753 to svn://svn.ffmpeg.org/ffmpeg/trunk
2004-02-06 17:51:58 +00:00
7408ad05cc
10l
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Originally committed as revision 1940 to svn://svn.ffmpeg.org/ffmpeg/trunk
2003-06-09 19:11:50 +00:00
5e20f836b3
FFV1 codec (our very simple lossless intra only codec, compresses much better then huffyuv)
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Originally committed as revision 1939 to svn://svn.ffmpeg.org/ffmpeg/trunk
2003-06-09 02:24:51 +00:00
8f8c0800f8
cleanup
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Originally committed as revision 1932 to svn://svn.ffmpeg.org/ffmpeg/trunk
2003-06-06 10:04:15 +00:00
61ccfcc009
(truncated) unary binerization
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unary k-th order exp golomb binarization
Originally committed as revision 1920 to svn://svn.ffmpeg.org/ffmpeg/trunk
2003-05-30 01:05:48 +00:00
d592f67fb6
CABAC
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note, this is just the CABAC (de)coder not complete h264-cabac support
Originally committed as revision 1915 to svn://svn.ffmpeg.org/ffmpeg/trunk
2003-05-28 18:44:52 +00:00
Michael Niedermayer
Jindřich Makovička
Diego Biurrun
Guillaume Poirier
Loren Merritt
Måns Rullgård
Alex Beregszaszi