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Commit Graph

Author	SHA1	Message	Date
Gyan Doshi	1c23abc88f	avutil/eval: add function to track variable use 1)Some filters allow cross-referenced expressions e.g. x=y+10. In such cases, filters evaluate expressions multiple times for successful evaluation of all expressions. If the expression for one or more variables contains a RNG, the result may vary across evaluation leading to inconsistent values across the cross-referenced expressions. 2)A related case is circular expressions e.g. x=y+10 and y=x+10 which cannot be succesfully resolved. 3)Certain filter variables may only be applicable in specific eval modes and lead to a failure of evaluation in other modes e.g. pts is only relevant for frame eval mode. At present, there is no reliable means to identify these occurrences and thus the error messages provided are broad or inaccurate. The helper function introduced - av_expr_count_vars - allows developers to identify the use and count of variables in expressions and thus tailor the error message, allow for a graceful fallback and/or decide evaluation order.	5 years ago
Paul B Mahol	961d6493e8	avutil/eval: add sgn()	5 years ago
Paul B Mahol	1146133df8	avutil/eval: add linear interpolation helper	7 years ago
Diego Biurrun	97cfe1d8bd	Convert all AVClass struct declarations to designated initializers.	8 years ago
Kevin Mark	482566ccc3	libavutil/eval: Add round function to expression parser We have floor, ceil, and trunc. Let's add round. Signed-off-by: Kevin Mark <kmark937@gmail.com> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>	8 years ago
Paul B Mahol	13564fc24d	avutil/eval: add atan2 function Signed-off-by: Paul B Mahol <onemda@gmail.com>	8 years ago
James Almer	1d4d0ee4b0	avutil/reverse: move the ff_reverse declaration to a separate header Fixes compilation with hardcoded tables after `eaff1aa09e` and `e71b8119e7` Reviewed-by: Timo Rothenpieler <timo@rothenpieler.org> Signed-off-by: James Almer <jamrial@gmail.com>	8 years ago
Diego Biurrun	d12b5b2f13	build: Split test programs off into separate files This avoids spurious library rebuilds when only the test program code is changed and simplifies the build system.	9 years ago
Ganesh Ajjanagadde	db1a642cd2	all: move ff_exp10, ff_exp10f, ff_fast_powf to lavu/ffmath.h The idea is to use ffmath.h for internal implementations of math functions. Currently, it is used for variants of libm functions, but is by no means limited to such things. Note that this is not exported; use lavu/mathematics for such purposes. Reviewed-by: Ronald S. Bultje <rsbultje@gmail.com> Signed-off-by: Ganesh Ajjanagadde <gajjanag@gmail.com>	9 years ago
Ganesh Ajjanagadde	0e9fe3e3c9	lavu/eval: replace pow(10,x) by ff_exp10(x) Reviewed-by: Ronald S. Bultje <rsbultje@gmail.com> Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>	9 years ago
Ganesh Ajjanagadde	4fa6f09c2c	lavu/eval: remove pow and exp2 for postfixes These postfixes can be computed statically, and there is no need to waste runtime resources. Tested with FATE. Reviewed-by: Michael Niedermayer <michael@niedermayer.cc> Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>	9 years ago
Ganesh Ajjanagadde	401c93ddb7	avutil/eval: change sqrt to hypot This improves the mathematical behavior of hypotenuse computation. Reviewed-by: Michael Niedermayer <michael@niedermayer.cc> Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>	9 years ago
Andreas Cadhalpun	107e54c5bf	avutil: add ff_reverse as av_reverse replacement The table is used in libavutil/eval.c. Reviewed-by: Michael Niedermayer <michael@niedermayer.cc> Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>	9 years ago
Michael Niedermayer	c49e7924a8	avutil/eval: check for av_malloc failure Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	10 years ago
Michael Niedermayer	61123634dd	avutil/eval: factor av_expr_free() calls out Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	10 years ago
Gabriel Dume	f929ab0569	cosmetics: Write NULL pointer equality checks more compactly Signed-off-by: Diego Biurrun <diego@biurrun.de>	10 years ago
Michael Niedermayer	88efc013b1	avutil: move QP2LAMBDA constant to eval Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	10 years ago
Stefano Sabatini	f3e886c7df	lavu/eval: add clip function	10 years ago
Janne Grunau	fb0c9d41d6	avutil: remove timer.h include from internal.h Added libavutil/timer.h include to all files with {START,STOP}_TIMER.	11 years ago
Diego Biurrun	5b097399ba	eval: Explicitly ignore return value of strtod() in parse_db() The return value is not needed. This fixes the warning: libavutil/eval.c:353:15: warning: ignoring return value of ‘strtod’	11 years ago
Carl Eugen Hoyos	0915b531bc	Rename "AVClass class" as "AVClass component_class". The aix header math.h defines "extern int class()" for C.	12 years ago
Stefano Sabatini	8afcaaeb75	lavu/eval: rename "new_eval_expr()" to "make_eval_expr()" The new name is more semantically and stilistically consistent.	12 years ago
Clément Bœsch	77f60f0011	lavu/eval: add between() function.	12 years ago
Stefano Sabatini	b2098d2417	lavu/eval: add bitor and bitand functions Warning note suggested by Reimar.	12 years ago
Reimar Döffinger	efa7f42020	Use the avstring.h locale-independent character type functions Make sure the behavior does not change with the locale. Signed-off-by: Martin Storsjö <martin@martin.st>	12 years ago
Stefano Sabatini	ad48556135	lavu/eval: add native support to lte and lt functions	12 years ago
Reimar Döffinger	88d55b827d	Remove incorrect use of ctype.h functions. As far as I can tell the code should not change behaviour depending on locale in any of these places. Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>	12 years ago
Michael Niedermayer	29c8619a49	fate: add print() to the tests of eval Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	12 years ago
Michael Niedermayer	09ece9fa6c	eval: print() support This allows printing values via av_log from expressions. Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	12 years ago
Michael Niedermayer	3cd9849d9c	eval: fix 'warning: ignoring return value of strtod, declared with attribute warn_unused_result' Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	12 years ago
Stefano Sabatini	2ed0803c6c	lavu/eval: extend if/ifnot functions to accept a third parameter Add support to an if/else construct, simplify logic in expressions.	12 years ago
Michael Niedermayer	31cd1e20bb	eval: add function to access the current "wallclock" time. Reviewed-by: Stefano Sabatini <stefasab@gmail.com> Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	12 years ago
Clément Bœsch	49a78e6b8c	lavu/eval: handle div by zero in mod(). Similarly to `03f5043f5`, we use the FTRAPV config setting.	12 years ago
Justin Ruggles	5312268b34	eval: treat dB as decibels instead of decibytes	12 years ago
Anton Khirnov	cb45553f57	Remove pointless #undefs of previously forbidden functions.	12 years ago
Stefano Sabatini	1c6962dc20	lavu: remove disabled FF_API_OLD_EVAL_NAMES code	12 years ago
Michael Niedermayer	25a21c587c	eval-test: add some otherwise untested functions. Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	12 years ago
Mans Rullgard	74c39bc682	eval-test: make table static const Signed-off-by: Mans Rullgard <mans@mansr.com>	12 years ago
Michael Niedermayer	03f5043f5d	eval: Fix eval test with ftrapv Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	12 years ago
Martin Storsjö	1d9c2dc89a	Don't include common.h from avutil.h Signed-off-by: Martin Storsjö <martin@martin.st>	12 years ago
Ronald S. Bultje	02ac28229a	eval: fix printing of NaN in eval fate test. This fixes "make fate-eval" on MSVC builds. Without this, the test outputs "-1.#NaN" instead of "nan" on MSVS 2010.	12 years ago
Janne Grunau	2d497c141d	eval: add gt(), gte(), lt() and lte() fate tests	13 years ago
Max Lazarov	caac3ab6ef	eval: fix swapping of lt() and lte() CC: libav-stable@libav.org	13 years ago
Martin Storsjö	143f1e9203	eval: Add the isinf() function and tests for it Signed-off-by: Martin Storsjö <martin@martin.st>	13 years ago
Martin Storsjö	3893feeccd	opt/eval: Include mathematics.h for NAN/INFINITY These files use NAN/INFINITY but didn't include mathematics.h to get the fallback definitions if the system lacks the macros. Signed-off-by: Martin Storsjö <martin@martin.st>	13 years ago
maxlazarov	7a3df014b9	The lt and lte functions were swapped.	13 years ago
Michael Niedermayer	d2101bffa0	eval: fix infinite loop on opensolaris x86. Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	13 years ago
Michael Niedermayer	59affed23c	eval: add root() to solve f(x)=0 Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	13 years ago
Michael Niedermayer	8c5ee45d13	eval: Check that single parameter functions dont get a second param. Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	13 years ago
Michael Niedermayer	923092697a	eval: Allow specifying the variable id. Reviewed-by: Nicolas George <nicolas.george@normalesup.org> Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	13 years ago

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109 Commits (ae84305036ceced3813fb295b71d51343ffd9535)