Po \u0161tyroch rokoch v\u00fdvoja bolo vytvoren\u00e9 prv\u00e9 vydanie projektu libcamera (0.0.1), ktor\u00e9 poskytuje softv\u00e9rov\u00fd stack pre pr\u00e1cu s videokamerami, fotoapar\u00e1tmi a TV tunerami v Linuxe, Android a ChromeOS, pri\u010dom pokra\u010duje vo v\u00fdvoji API V4L2 a postupom \u010dasu ho nahrad\u00ed. Ke\u010f\u017ee API kni\u017enice sa st\u00e1le vyv\u00edja a nie je \u00faplne stabilizovan\u00e9, projekt sa doposia\u013e vyv\u00edjal bez rozdelenia na jednotliv\u00e9 vydania s vyu\u017eit\u00edm nepretr\u017eit\u00e9ho modelu v\u00fdvoja. V reakcii na potrebu distrib\u00faci\u00ed sledova\u0165 zmeny API ovplyv\u0148uj\u00face kompatibilitu a pre zjednodu\u0161enie dod\u00e1vky kni\u017enice v bal\u00ed\u010dkoch, bolo teraz prijat\u00e9 rozhodnutie pravidelne vytv\u00e1ra\u0165 vydania, ktor\u00e9 odr\u00e1\u017eaj\u00fa stupe\u0148 zmeny ABI a API. K\u00f3d projektu je nap\u00edsan\u00fd v C++ a je distribuovan\u00fd pod licenciou LGPLv2.1. <\/p>\n
Projekt je vyv\u00edjan\u00fd v\u00fdvoj\u00e1rmi multimedi\u00e1lnych subsyst\u00e9mov jadra Linuxu spolu s nieko\u013ek\u00fdmi v\u00fdrobcami kamier s cie\u013eom normalizova\u0165 situ\u00e1ciu s podporou kamier pre smartf\u00f3ny a zabudovan\u00e9 zariadenia v Linuxe, ktor\u00e9 s\u00fa viazan\u00e9 na propriet\u00e1rne ovl\u00e1da\u010de. Existuj\u00face API V4L2 v jadre Linuxu bolo p\u00f4vodne vytvoren\u00e9 s oh\u013eadom na pr\u00e1cu s tradi\u010dn\u00fdmi samostatn\u00fdmi webov\u00fdmi kamerami a je zle prisp\u00f4soben\u00e9 ned\u00e1vnym trendom presunu funk\u010dnosti MCU na hlavn\u00fd CPU. <\/p>\n
Na rozdiel od tradi\u010dn\u00fdch kamier, v ktor\u00fdch sa prim\u00e1rne spracovanie obrazov vykon\u00e1va na zabudovanom \u0161pecializovanom procesore (MCU), vo vnoren\u00fdch zariadeniach s\u00fa tieto funkcie z d\u00f4vodu zn\u00ed\u017eenia n\u00e1kladov prenesen\u00e9 na hlavn\u00fa CPU a vy\u017eaduj\u00fa zlo\u017eit\u00fd ovl\u00e1da\u010d, ktor\u00fd zah\u0155\u0148a licencovan\u00e9 komponenty, ktor\u00e9 nie s\u00fa verejne dostupn\u00e9. V r\u00e1mci projektu libcamera sa z\u00e1stancovia otvoren\u00e9ho softv\u00e9ru a v\u00fdrobcovia hardv\u00e9ru sna\u017eili vytvori\u0165 kompromisn\u00e9 rie\u0161enie, ktor\u00e9 na jednej strane uspokoj\u00ed potreby v\u00fdvoj\u00e1rov otvoren\u00e9ho softv\u00e9ru a na druhej strane \u2014 ochr\u00e1ni du\u0161evn\u00e9 vlastn\u00edctvo v\u00fdrobcov kamier. <\/p>\n
Navrhovan\u00e1 kni\u017enica libcamera je plne implementovan\u00e1 v u\u017e\u00edvate\u013eskom priestore. Aby bola zabezpe\u010den\u00e1 kompatibilita s existuj\u00facimi softv\u00e9rov\u00fdmi prostrediami a aplik\u00e1ciami, s\u00fa poskytnut\u00e9 vrstvy pre kompatibilitu s API V4L, Gstreamer a Android Camera HAL. \u0160pecifick\u00e9 pre ka\u017ed\u00fa kameru propriet\u00e1rne komponenty pre interakciu s hardv\u00e9rom s\u00fa vytvoren\u00e9 ako moduly, ktor\u00e9 be\u017eia v samostatn\u00fdch procesoch a komunikuj\u00fa s kni\u017enicou prostredn\u00edctvom IPC. Moduly nemaj\u00fa priamy pr\u00edstup k zariadeniu a obr\u00e1\u0165te sa na hardv\u00e9r cez medzivrstvov\u00fd API, ktor\u00e9ho po\u017eiadavky s\u00fa kontrolovan\u00e9, filtrovan\u00e9 a obmedzen\u00e9 len na funk\u010dnos\u0165 potrebn\u00fa na ovl\u00e1danie kamery. <\/p>\n
Kni\u017enica tie\u017e poskytuje pr\u00edstup k algoritmom na spracovanie a zlep\u0161enie kvality obrazov a vide\u00ed (nastavenie vyv\u00e1\u017eenia bielej, odstr\u00e1nenie \u0161umu, stabiliz\u00e1cia videa, automatick\u00e9 zaostrenie, nastavenie expoz\u00edcie a pod.), ktor\u00e9 sa m\u00f4\u017eu pripoji\u0165 ako otvoren\u00e9 extern\u00e9 kni\u017enice alebo propriet\u00e1rne izolovan\u00e9 moduly. API umo\u017e\u0148uje pr\u00edstup k tak\u00fdm funkci\u00e1m, ako je identifik\u00e1cia funk\u010dnosti existuj\u00facich extern\u00fdch a vstavan\u00fdch kamier, vyu\u017e\u00edvanie profilov zariaden\u00ed, spracovanie udalost\u00ed pripojenia a odpojenia kamier, riadenie sn\u00edmania \u00fadajov z kamier na \u00farovni jednotliv\u00fdch sn\u00edmok a synchroniz\u00e1cia sn\u00edmok so \u010dinnos\u0165ou blesku. Mo\u017en\u00e1 je samostatn\u00e1 pr\u00e1ca s viacer\u00fdmi kamerami v syst\u00e9me a organiz\u00e1cia s\u00fabe\u017en\u00e9ho z\u00e1znamu viacer\u00fdch videostreamov z jednej kamery (napr\u00edklad jeden s n\u00edzkym rozl\u00ed\u0161en\u00edm pre videokonferenciu a druh\u00fd s vysok\u00fdm rozl\u00ed\u0161en\u00edm pre archiv\u00e1ciu na disku). \u041f\u043e\u0441\u043b\u0435 \u0447\u0435\u0442\u044b\u0440\u0451\u0445 \u043b\u0435\u0442 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u0441\u0444\u043e\u0440\u043c\u0438\u0440\u043e\u0432\u0430\u043d \u043f\u0435\u0440\u0432\u044b\u0439 \u0432\u044b\u043f\u0443\u0441\u043a \u043f\u0440\u043e\u0435\u043a\u0442\u0430 libcamera (0.0.1), \u043f\u0440\u0435\u0434\u043b\u0430\u0433\u0430\u044e\u0449\u0435\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u044b\u0439 \u0441\u0442\u0435\u043a \u0434\u043b\u044f \u0440\u0430\u0431\u043e\u0442\u044b \u0441 \u0432\u0438\u0434\u0435\u043e\u043a\u0430\u043c\u0435\u0440\u0430\u043c\u0438, \u0444\u043e\u0442\u043e\u043a\u0430\u043c\u0435\u0440\u0430\u043c\u0438 \u0438 TV-\u0442\u044e\u043d\u0435\u0440\u0430\u043c\u0438 \u0432 Linux, Android \u0438 ChromeOS, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043f\u0440\u043e\u0434\u043e\u043b\u0436\u0430\u0435\u0442 \u0440\u0430\u0437\u0432\u0438\u0442\u0438\u0435 API V4L2 \u0438 \u0441\u043e \u0432\u0440\u0435\u043c\u0435\u043d\u0435\u043c \u0437\u0430\u043c\u0435\u043d\u0438\u0442 \u0435\u0433\u043e. \u0422\u0430\u043a \u043a\u0430\u043a API \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 \u0435\u0449\u0451 \u043f\u0440\u043e\u0434\u043e\u043b\u0436\u0430\u0435\u0442 \u043c\u0435\u043d\u044f\u0442\u044c\u0441\u044f \u0438 \u043e\u043a\u043e\u043d\u0447\u0430\u0442\u0435\u043b\u044c\u043d\u043e \u043d\u0435 \u0441\u0442\u0430\u0431\u0438\u043b\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043d, \u0434\u043e \u0441\u0438\u0445 \u043f\u043e\u0440 \u043f\u0440\u043e\u0435\u043a\u0442 \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u043b\u0441\u044f \u0431\u0435\u0437 \u043e\u0442\u0432\u0435\u0442\u0432\u043b\u0435\u043d\u0438\u044f \u043e\u0442\u0434\u0435\u043b\u044c\u043d\u044b\u0445 \u0432\u044b\u043f\u0443\u0441\u043a\u043e\u0432 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-105321","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Prv\u00e9 vydanie libcamera, stack pre podporu kamier v Linuxe | ProHoster","description":"Po \u0161tyroch rokoch v\u00fdvoja bol vytvoren\u00fd prv\u00fd vydanie projektu libcamera (0.0.1), ktor\u00fd pon\u00faka softv\u00e9rov\u00fd stack pre pr\u00e1cu s videokamerami, fotokamerami a TV tunermi v Linuxe, Androide a ChromeOS a pokra\u010duje.","canonical_url":"https:\/\/prohoster.info\/sk\/blog\/news\/pervyj-vypusk-libcamera-steka-dlya-podderzhki-kamer-v-linux","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"sk_SK","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u041f\u0435\u0440\u0432\u044b\u0439 \u0432\u044b\u043f\u0443\u0441\u043a libcamera, \u0441\u0442\u0435\u043a\u0430 \u0434\u043b\u044f \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0438 \u043a\u0430\u043c\u0435\u0440 \u0432 Linux | ProHoster","og:description":"\u041f\u043e\u0441\u043b\u0435 \u0447\u0435\u0442\u044b\u0440\u0451\u0445 \u043b\u0435\u0442 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u0441\u0444\u043e\u0440\u043c\u0438\u0440\u043e\u0432\u0430\u043d \u043f\u0435\u0440\u0432\u044b\u0439 \u0432\u044b\u043f\u0443\u0441\u043a \u043f\u0440\u043e\u0435\u043a\u0442\u0430 libcamera (0.0.1), \u043f\u0440\u0435\u0434\u043b\u0430\u0433\u0430\u044e\u0449\u0435\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u044b\u0439 \u0441\u0442\u0435\u043a \u0434\u043b\u044f \u0440\u0430\u0431\u043e\u0442\u044b \u0441 \u0432\u0438\u0434\u0435\u043e\u043a\u0430\u043c\u0435\u0440\u0430\u043c\u0438, \u0444\u043e\u0442\u043e\u043a\u0430\u043c\u0435\u0440\u0430\u043c\u0438 \u0438 TV-\u0442\u044e\u043d\u0435\u0440\u0430\u043c\u0438 \u0432 Linux, Android \u0438 ChromeOS, 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Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"