FFmpeg

Commit Graph

Author	SHA1	Message	Date
Justin Ruggles	38c1a5c4d9	update my email address to one which does not depend on my service provider Originally committed as revision 14797 to svn://svn.ffmpeg.org/ffmpeg/trunk	16 years ago
Justin Ruggles	9045f5e72d	cosmetics: adjust line breaks and vertical alignment Originally committed as revision 14795 to svn://svn.ffmpeg.org/ffmpeg/trunk	16 years ago
Justin Ruggles	56c07e2989	use limited range of lpc orders when quantizing coefficients Originally committed as revision 14794 to svn://svn.ffmpeg.org/ffmpeg/trunk	16 years ago
Ramiro Polla	c50da3ad6c	flacenc, lpc: Move LPC code from flacenc.c to new lpc.[ch] files. Originally committed as revision 14790 to svn://svn.ffmpeg.org/ffmpeg/trunk	16 years ago
Ramiro Polla	51c796d012	flacenc: Allow more flexible shift calculation in LPC. Originally committed as revision 14789 to svn://svn.ffmpeg.org/ffmpeg/trunk	16 years ago
Peter Ross	fd76c37fd9	Modify all codecs to report their supported input and output sample format(s). Originally committed as revision 14482 to svn://svn.ffmpeg.org/ffmpeg/trunk	17 years ago
Ramiro Polla	6647ab80e3	bitstream: move put_sbits() from flacenc.c to bitstream.h and use it throughout libavcodec. Originally committed as revision 14204 to svn://svn.ffmpeg.org/ffmpeg/trunk	17 years ago
Stefano Sabatini	fe4bf37455	Make AVCodec long_names definition conditional depending on CONFIG_SMALL. Originally committed as revision 13759 to svn://svn.ffmpeg.org/ffmpeg/trunk	17 years ago
Diego Biurrun	245976da2a	Use full path for #includes from another directory. Originally committed as revision 13098 to svn://svn.ffmpeg.org/ffmpeg/trunk	17 years ago
Stefano Sabatini	d5202e4fda	Add long names to many AVCodec declarations. patch by Stefano Sabatini, stefano.sabatini-lala poste it Originally committed as revision 13005 to svn://svn.ffmpeg.org/ffmpeg/trunk	17 years ago
Justin Ruggles	42ceeb5f3c	remove redundant context variable Originally committed as revision 12642 to svn://svn.ffmpeg.org/ffmpeg/trunk	17 years ago
Justin Ruggles	fe790f89e8	Use 15-bit LPC precision by default. This generally gives better compression results. Also update Ogg regression test. Originally committed as revision 12630 to svn://svn.ffmpeg.org/ffmpeg/trunk	17 years ago
Zuxy Meng	98a6fff98c	Apply 'cold' attribute to init/uninit functions in libavcodec Originally committed as revision 12525 to svn://svn.ffmpeg.org/ffmpeg/trunk	17 years ago
Michael Niedermayer	a4195e68b6	assert() and note about odd len. Originally committed as revision 11884 to svn://svn.ffmpeg.org/ffmpeg/trunk	17 years ago
Michael Niedermayer	fa4ed8c10a	optimize apply_welch_window() Originally committed as revision 11881 to svn://svn.ffmpeg.org/ffmpeg/trunk	17 years ago
Aurelien Jacobs	3abe5fbdc4	improve CRC API - don't export any global var - provide either generated or hardcoded tables Originally committed as revision 11409 to svn://svn.ffmpeg.org/ffmpeg/trunk	17 years ago
Loren Merritt	90f0344165	remove a branch from an inner loop. 1% faster flac encoding. Originally committed as revision 10865 to svn://svn.ffmpeg.org/ffmpeg/trunk	17 years ago
Loren Merritt	286127c5dd	div -> mul Originally committed as revision 10630 to svn://svn.ffmpeg.org/ffmpeg/trunk	17 years ago
Loren Merritt	b8de342919	simplify lpc Originally committed as revision 10628 to svn://svn.ffmpeg.org/ffmpeg/trunk	17 years ago
Loren Merritt	bfdd5bc1f1	unroll finite differences to avoid swapping registers. 1.5x faster encode_residual_fixed(). overall flac encoding: 3% faster at compression_levels 0-2. Originally committed as revision 10625 to svn://svn.ffmpeg.org/ffmpeg/trunk	17 years ago
Loren Merritt	a309dce75f	encode_residual_fixed(): replace FIR with finite differences. 4x faster order 2, 3.5x order 3, 3x order 4. overall flac encoding: 35% faster at compression_levels 0-2, no effect at higher levels. Originally committed as revision 10624 to svn://svn.ffmpeg.org/ffmpeg/trunk	17 years ago
Loren Merritt	6810b93a81	sse2 version of compute_autocorr(). 4x faster than c (somehow, even though doubles only allow 2x simd). overal flac encoding: 15-50% faster on core2, 4-11% on k8, 3-13% on p4. Originally committed as revision 10621 to svn://svn.ffmpeg.org/ffmpeg/trunk	17 years ago
Loren Merritt	19b9c7cc66	was computing one more autocorrelation coefficient that was actually used Originally committed as revision 10613 to svn://svn.ffmpeg.org/ffmpeg/trunk	17 years ago
Loren Merritt	14bd2a9f25	replace brute force find_optimal_param() with a closed-form solution. overall flac encoding: 4-15% faster. output is not identical to the previous algorithm due to occasional rounding errors, but the differece is less than .0005% bitrate. Originally committed as revision 10612 to svn://svn.ffmpeg.org/ffmpeg/trunk	17 years ago
Loren Merritt	f6215b1b06	gcc isn't smart enough to factor out duplicate stores Originally committed as revision 10611 to svn://svn.ffmpeg.org/ffmpeg/trunk	17 years ago
Loren Merritt	28e968c4a4	2.5x faster compute_autocorr() overall flac encoding: 15-50% faster on core2, 8-30% on k8, 2-20% on p4 (depending on compression_level) Originally committed as revision 10606 to svn://svn.ffmpeg.org/ffmpeg/trunk	17 years ago
Loren Merritt	dc44d4ad64	unroll encode_residual_lpc(). speedup varies between 1.2x and 1.8x depending on lpc order. Originally committed as revision 10596 to svn://svn.ffmpeg.org/ffmpeg/trunk	17 years ago
Loren Merritt	0d2caa37c5	oops, potential overflow on really large blocks Originally committed as revision 10587 to svn://svn.ffmpeg.org/ffmpeg/trunk	17 years ago
Loren Merritt	f74471e043	optimize encode_residual_lpc() 37%/45%/90% faster on core2/k8/p4, making flac encoding overall 15%/17%/40% faster at compression_level>=8 (less at low levels). Originally committed as revision 10585 to svn://svn.ffmpeg.org/ffmpeg/trunk	17 years ago
Reimar Döffinger	f66e4f5f9e	Add av_ prefix to clip functions Originally committed as revision 8122 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Zuxy Meng	360932f76d	Fix ASF format parser's broken UTF-16 string handling 1. Add a PUT_UTF8 macro to common.h; code borrowed from libavcodec/flacenc.c. 2. Make use of the macro in flacenc.c Patch by Zuxy Meng % zuxy P meng A gmail P com % Original thread: Date: Nov 5, 2006 9:56 AM Subject: [Ffmpeg-devel] PUT_UTF8 & asf format enhancement Originally committed as revision 6911 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Diego Biurrun	c26abfa541	Rename ABS macro to FFABS. Originally committed as revision 6666 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
Justin Ruggles	e1bbc0321c	cosmetic change to adjust alignment. Originally committed as revision 5767 to svn://svn.ffmpeg.org/ffmpeg/trunk	19 years ago
Justin Ruggles	5f3acd9ec9	Modify preset compression levels to utilize log search. Originally committed as revision 5766 to svn://svn.ffmpeg.org/ffmpeg/trunk	19 years ago
Michael Niedermayer	dbb45a3bb7	log prediction order search method Originally committed as revision 5763 to svn://svn.ffmpeg.org/ffmpeg/trunk	19 years ago
Justin Ruggles	26053bdcc8	Add lpc order search. This creates new compression levels 6 to 12. Originally committed as revision 5762 to svn://svn.ffmpeg.org/ffmpeg/trunk	19 years ago
Michael Niedermayer	408ec4e2a6	calculate all coefficients for several orders during cholesky factorization, the resulting coefficients are not strictly optimal though as there is a small difference in the autocorrelation matrixes which is ignored for the smaller orders Originally committed as revision 5758 to svn://svn.ffmpeg.org/ffmpeg/trunk	19 years ago
Michael Niedermayer	8ea543b580	cleanup Originally committed as revision 5750 to svn://svn.ffmpeg.org/ffmpeg/trunk	19 years ago
Michael Niedermayer	ab01b2b82a	optionally (use_lpc=2) support Cholesky factorization for finding the lpc coeficients this will find the coefficients which minimize the sum of the squared errors, levinson-durbin recursion OTOH is only strictly correct if the autocorrelation matrix is a toeplitz matrix which it is only if the blocksize is infinite, this is also why applying a window (like the welch winodw we currently use) improves the lpc coefficients generated by levinson-durbin recursion ... optionally (use_lpc>2) support iterative linear least abs() solver using cholesky factorization with adjusted weights in each iteration compression gain for both is small, and multiple passes are of course dead slow Originally committed as revision 5747 to svn://svn.ffmpeg.org/ffmpeg/trunk	19 years ago
Michael Niedermayer	1484a46753	dither lpc cpeffs Originally committed as revision 5727 to svn://svn.ffmpeg.org/ffmpeg/trunk	19 years ago
Justin Ruggles	c6375bf23c	allows user-settable block size and fixes related typo Originally committed as revision 5674 to svn://svn.ffmpeg.org/ffmpeg/trunk	19 years ago
Justin Ruggles	1e5707b7b8	porder patch by (Justin Ruggles jruggle a t earthlink d ot net) Originally committed as revision 5593 to svn://svn.ffmpeg.org/ffmpeg/trunk	19 years ago
Michael Niedermayer	474176bf92	3 lines while -> 1 line for loop Originally committed as revision 5577 to svn://svn.ffmpeg.org/ffmpeg/trunk	19 years ago
Michael Niedermayer	5d2f52b989	simplify Originally committed as revision 5576 to svn://svn.ffmpeg.org/ffmpeg/trunk	19 years ago
Michael Niedermayer	b2e30cb324	simplify compute_autocorr Originally committed as revision 5575 to svn://svn.ffmpeg.org/ffmpeg/trunk	19 years ago
Michael Niedermayer	412759560c	dont use memcpy for copying structs Originally committed as revision 5574 to svn://svn.ffmpeg.org/ffmpeg/trunk	19 years ago
Michael Niedermayer	7c69b83057	simplify Originally committed as revision 5573 to svn://svn.ffmpeg.org/ffmpeg/trunk	19 years ago
Justin Ruggles	a403fc0324	flac-lpc patch by (Justin Ruggles jruggle earthlink net) tabs removed and regression.sh fixed (it was missing in the patch) by me Originally committed as revision 5572 to svn://svn.ffmpeg.org/ffmpeg/trunk	19 years ago
Michael Niedermayer	78f67b7ad3	simplify Originally committed as revision 5571 to svn://svn.ffmpeg.org/ffmpeg/trunk	19 years ago

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177 Commits (85d2b0987baeb980234c17be076108d53ffe0cd6)