FFmpeg

Commit Graph

Author	SHA1	Message	Date
Michael Niedermayer	2b5269b51c	moving lps state transition code a little up in the branched asm code (1% faster on P3) Originally committed as revision 6658 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	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) Originally committed as revision 6657 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	d17faef011	use ecx instead of cl (no speed change on P3 but might avoid partial register stalls on some cpus) Originally committed as revision 6656 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	d61c4e731e	make state transition tables global as they are constant and the code is slightly faster that way Originally committed as revision 6655 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	5f3eca121e	10l Originally committed as revision 6654 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	0fa352c7e6	make lps_range a global table its constant anyway (saves 1 addition for accessing it) Originally committed as revision 6653 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	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 ... Originally committed as revision 6652 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Diego Biurrun	0bc2e7f081	BRANCHLESS_CABAD --> BRANCHLESS_CABAC_DECODER Originally committed as revision 6623 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	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 Originally committed as revision 6618 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	f1b37db48d	move the &1 out of the asm so gcc can optimize it away in inlined cases (yes this is slightly faster) Originally committed as revision 6616 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	ab0151d163	replace a few and/sub/... by cmov 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	18 years ago
Michael Niedermayer	a6672acf45	reading 8bit mem into a 8bit register needs 2 uops on P4, 8bit->32bit with zero extension needs just 1 Originally committed as revision 6612 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	2d3df05ca0	on the P4 inc needs twice as much time a add Originally committed as revision 6611 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	2ee9dc65be	10l Originally committed as revision 6610 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	7822e1c1ff	reverse remainder of the failed attempt to optimize *state=c->mps_state[s] Originally committed as revision 6609 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	ef0090a998	x86 branchless cabac decoder slightly faster on P3 Originally committed as revision 6608 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	2e1aee80f4	optimize branchless C CABAC decoder Originally committed as revision 6607 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	1c2a417f6a	move outcommented START/STOP_TIMER to a hopefully better place for benchmarking ... Originally committed as revision 6605 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	30dc5f56ad	drop failed attempt to optimize *state= c->mps_state[s]; Originally committed as revision 6604 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	c56d23dacf	10l bugfix for some disabled code Originally committed as revision 6603 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	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 Originally committed as revision 6602 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	5bbe2a5292	remove bytestream_end checks, seems to work fine without them and the bitstream reader doesnt check for the end either Originally committed as revision 6599 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	c010d69a75	decrease ff_h264_norm_shift[] size Originally committed as revision 6596 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	6ff042699f	cleanup Originally committed as revision 6594 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	260ceb6322	branchless renormalization (1% faster get_cabac) old branchless renormalization wasnt faster because gcc was scared of the shift variable (missusing bit variable now) Originally committed as revision 6587 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	99ce10873d	5% faster get_cabac() Originally committed as revision 6586 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	400d0f8e47	disable benchmarking code disable asm optims as the fastest depends on cpu type Originally committed as revision 6582 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	4310580db5	renorm_cabac_decoder_once START/STOP_TIMER scores for athlon Originally committed as revision 6581 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	5659b509c7	refill cabac variables in 16bit steps, 3% faster get_cabac() Originally committed as revision 6578 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Diego Biurrun	b78e7197a8	Change license headers to say 'FFmpeg' instead of 'this program/this library' and fix GPL/LGPL version mismatches. Originally committed as revision 6577 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	2ae7569dc8	() 10l Originally committed as revision 6576 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	ec8f483ab5	several x86 renorm_cabac_decoder_once optimizations 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	18 years ago
Loren Merritt	938dd84693	don't try to inline cabac functions. gcc ignored the hint anyway, and forcing it would make h264 slower. Originally committed as revision 6549 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Loren Merritt	bfe328caf0	tweak cabac. 0.5% faster h264. Originally committed as revision 6106 to svn://svn.ffmpeg.org/ffmpeg/trunk	19 years ago
Loren Merritt	2848ce84d2	don't force asserts in release builds. 2% faster h264. Originally committed as revision 5332 to svn://svn.ffmpeg.org/ffmpeg/trunk	19 years ago
Diego Biurrun	5509bffa88	Update licensing information: The FSF changed postal address. Originally committed as revision 4842 to svn://svn.ffmpeg.org/ffmpeg/trunk	19 years ago
Diego Biurrun	115329f160	COSMETICS: Remove all trailing whitespace. Originally committed as revision 4749 to svn://svn.ffmpeg.org/ffmpeg/trunk	19 years ago
Loren Merritt	6d1feb028f	decode h264 end-of-slice flag Originally committed as revision 4316 to svn://svn.ffmpeg.org/ffmpeg/trunk	20 years ago
Måns Rullgård	88730be651	kill warnings patch by (Måns Rullgård <mru inprovide com>) Originally committed as revision 3977 to svn://svn.ffmpeg.org/ffmpeg/trunk	20 years ago
Michael Niedermayer	ec7eb8966c	optimization Originally committed as revision 3639 to svn://svn.ffmpeg.org/ffmpeg/trunk	20 years ago
Michael Niedermayer	bba8334965	overread fix Originally committed as revision 3294 to svn://svn.ffmpeg.org/ffmpeg/trunk	21 years ago
Michael Niedermayer	e96682e6f4	some of the warning fixes by (Michael Roitzsch <mroi at users dot sourceforge dot net>) Originally committed as revision 3140 to svn://svn.ffmpeg.org/ffmpeg/trunk	21 years ago
Alex Beregszaszi	b46243ed1c	get_bit_count -> put_bits_count Originally committed as revision 2753 to svn://svn.ffmpeg.org/ffmpeg/trunk	21 years ago
Michael Niedermayer	7408ad05cc	10l Originally committed as revision 1940 to svn://svn.ffmpeg.org/ffmpeg/trunk	22 years ago
Michael Niedermayer	5e20f836b3	FFV1 codec (our very simple lossless intra only codec, compresses much better then huffyuv) Originally committed as revision 1939 to svn://svn.ffmpeg.org/ffmpeg/trunk	22 years ago
Michael Niedermayer	8f8c0800f8	cleanup Originally committed as revision 1932 to svn://svn.ffmpeg.org/ffmpeg/trunk	22 years ago
Michael Niedermayer	61ccfcc009	(truncated) unary binerization unary k-th order exp golomb binarization Originally committed as revision 1920 to svn://svn.ffmpeg.org/ffmpeg/trunk	22 years ago
Michael Niedermayer	d592f67fb6	CABAC 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	22 years ago

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98 Commits (4f95f80e2d42f00a595e7e975cda0e6c555b668e)