movit-fosdem2014.pdf

8/21/2019 movit-fosdem2014.pdf

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Movit: The modern video tool

A high-quality, high-performance, open-source* lib

for video filters

* G!v"#


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$igh-performance%

The road from the &'s to "'() and back


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A+ .(/&/0

inti1

for.i 2 '1 i 3 4idth * height1 ##i0 5 out6i7 2 a6i7 * .(8'- f0 # b6i7 * f19


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+ave one multiply

inti1

for.i 2 '1 i 3 4idth * height1 ##i0 5 out6i7 2 a6i7 # .b6i7 - a6i70 * f19


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(8( fi;ed-point .typical /'s code

intfi 2 lrintf.f * ?@0 CC (019


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MMD .(//B0

const intfi 2 lrintf.f * "?@01const FFm) fvec 2 FmmFset(Fpi(.fi0, finvvec 2 FmmFset(Fpi(.finv01const FFm)*avec 2 .FFm)*0a, *bvec 2 .FFm)*0b1FFm)*outvec 2 .FFm)*0out1for. 1 i 3 4idth * height1 i #2 &0 5

FFm)aval 2 avec6i H &7, bval 2 bvec6i H &71FFm)aFlo 2 FmmFunpackloFpi&.aval, ero0, aFhi 2 FmmFunpackhiFpi&.aval, ero01

FFm)bFlo 2 FmmFunpackloFpi&.bval, ero0, bFhi 2 FmmFunpackhiFpi&.bval, ero01FFm)outFlo 2 FmmFaddFpi(.FmmFmulloFpi(.finvvec, aFlo0, FmmFmulloFpi(.fvec, FFm)outFhi 2 FmmFaddFpi(.FmmFmulloFpi(.finvvec, aFhi0, FmmFmulloFpi(.fvec, outFlo 2 FmmFsrliFpi(.FmmFaddFpi(.outFlo, roundvec0, &01outFhi 2 FmmFsrliFpi(.FmmFaddFpi(.outFhi, roundvec0, &01outvec6i H &7 2 FmFpackus4b.outFlo, outFhi01

9Eendiffor . 1 i 3 4idth * height1 ##i0 5

out6i7 2 .a6i7 * fi # b6i7 * finv # >?@0 CC &19


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Multicore .early "'''s0

HH All the stuff from the previous e;ample, plus support for ++I", AJD", et

pthreadFt threads6@MF?>I+71for.inti 2 '1 i 3 @MF?>I+1 ##i0 5 HH // has happened in the meantim

pthreadFcreate.Lthreads6i7, @!!, processFslice, .void*0i019HH ait for all the cores to come back, hope that all of them 4ere idle888for.inti 2 '1 i 3 @MF?>I+1 ##i0 5

pthreadFNoin.threads6i7, @!!019


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Orei'r blend plugin ."''0

const uint&Ft bf 2 .const uint&Ft0 ."


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R


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"'(): G@s are no longer uncomm

Tim SAvatarS Partel, -PQ-"8'


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flickr8comHphotosHfootfun, -PQ-"8'


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Mia Aasbakken, used 4ith permission


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antelotteriet anto, Apeland nformasNonHatrine !unke


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G!+! ."'')0

vec" tc 2 glFMultiTe;oord'8;y1

vec)first 2 te;ture".te;A, tc01vec)second 2 te;ture".te;P, tc01glFOragolor 2 first # vec).f0 * .second - first01


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AdNusted for inclusion in Movit

vec) [email protected]"tc0 5

vec)first 2 @T(.tc01 vec)second 2 @T".tc01 return first # vec).>IOD.f00 * .second - first019


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$igh-quality%?r: There is more than one 4ay to mess it u


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Oade done in gamma space

s>GP .incorrect0!inear light .correct0


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>ec8 "'"' misinterpreted as s>GP .>e.emphasied1 done three times0

flickr8comHphotosHfictu


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rong chroma subpi;el placemen.Qbr ):(:'0


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rong chroma subpi;el placemen.Qbr ):(:'0


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U 4c -l *8cpp V grep total ('"< total

U 4c -l *test*8cpp V grep total )&


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My first Movit chain

hoto by ikimedia ommons user etritap .-PQ-+A-=8'


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mageOormat inoutFformat.?!?>+AIFs>GP, GAMMAFs>GP01

Olatnput *input 2 ne4Olatnput.inoutFformat,

O?>MATFPG>AF?+TM@!T!IFA!$A,

G!F@+GIFPQTI, 4idth, height01chain8addFinput.input01

chain8addFeffect.ne4Glo4Iffect.001

chain8addFoutput.inoutFformat,

?@T@TFA!$AFO?>MATF?+TM@!T!I01

chain8setFditherFbits.&01chain8finalie.01

HH 8888

input-CsetFpi;elFdata.buf01

chain8renderFtoFscreen.01


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More Movit effects


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.ork in progress, coming soon0


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.ork in progress, coming soon0


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emo timeK


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Outure 4ork

More filters

Petter Qbr handling $andling of interlaced content

hatever clients need .4ithin reasonR0


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http:HHmovit8sesse8net

Thank youK

movit-fosdem2014.pdf

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