Nakon \u010detiri godine razvoja, formirano je prvo izdanje projekta libcamera (0.0.1), koje nudi softverski paket za rad s kamerama, fotoaparatima i TV tunerima na Linuxu, Androidu i ChromeOS-u, koji nastavlja razvoj API-ja V4L2 i s vremenom \u0107e ga zamijeniti. Budu\u0107i da se API biblioteke jo\u0161 uvijek mijenja i nije kona\u010dno stabiliziran, projekt se do sada razvijao bez izdvajanja pojedina\u010dnih izdanja koriste\u0107i kontinuirani model razvoja. Kao odgovor na potrebu distribucija za pra\u0107enjem promjena API-ja koje utje\u010du na kompatibilnost i radi pojednostavljenja isporuke biblioteke u paketima, sada je donesena odluka o periodi\u010dnom formiranju izdanja koja odra\u017eavaju stupanj promjene ABI-ja i API-ja. Kod projekta napisan je na C++ i distribuira se pod LGPLv2.1 licencom. <\/p>\n
Projekt razvijaju programeri multimedijskih sustava Linux jezgri u suradnji s nekim proizvo\u0111a\u010dima kamera u cilju normalizacije situacije s podr\u0161kom u Linuxu za kamere na pametnim telefonima i ugra\u0111enim ure\u0111ajima, koji su vezani uz proprijetarne drivere. Ve\u0107 postoje\u0107i API V4L2 u Linux jezgru nekada je stvoren s predod\u017ebom o radu s tradicionalnim web kamerama i slabo je prilago\u0111en novijoj tendenciji premje\u0161tanja funkcionalnosti MCU-a na CPU. <\/p>\n
Za razliku od tradicionalnih kamera, u kojima se operacije primarnog obrade slika odvijaju na ugra\u0111enom specijaliziranom procesoru (MCU), u ugra\u0111enim ure\u0111ajima, radi smanjenja tro\u0161kova, ove funkcije prebacuju se na glavni CPU i zahtijevaju slo\u017eeniji upravlja\u010dki program koji uklju\u010duje licencirane komponente koje nisu otvorene. U okviru projekta libcamera, pobornici otvorenog softvera i proizvo\u0111a\u010di opreme poku\u0161ali su stvoriti kompromisno rje\u0161enje koje, s jedne strane, zadovoljava potrebe programera otvorenog softvera, a s druge strane \u2014 omogu\u0107ava za\u0161titu intelektualnog vlasni\u0161tva proizvo\u0111a\u010da kamera. <\/p>\n
Predlo\u017eeni libcamera stack implementiran je u potpunosti u korisni\u010dkom prostoru. Za osiguranje kompatibilnosti s postoje\u0107im softverskim okru\u017eenjima i aplikacijama pru\u017eaju se slojevi za kompatibilnost s V4L API-jem, Gstreamer-om i Android Camera HAL-om. Specifi\u010dne za svaku kameru proprietary komponente interakcije s hardverom oblikovane su kao moduli koji se izvr\u0161avaju u zasebnim procesima i komuniciraju s bibliotekom putem IPC-a. Moduli nemaju izravni pristup ure\u0111aju i obra\u0107aju se hardveru preko posredni\u010dkog API-ja, \u010diji se zahtjevi provjeravaju, filtriraju i ograni\u010davaju isklju\u010divo na funkcionalnosti potrebne za upravljanje kamerom. <\/p>\n
Biblioteka tako\u0111er pru\u017ea pristup algoritmima za obradu i pobolj\u0161anje kvalitete slika i videa (ispravak bijele ravnote\u017ee, uklanjanje \u0161uma, stabilizacija videa, automatsko fokusiranje, odabir ekspozicije itd.), koji se mogu povezati kao otvorene vanjske biblioteke ili proprietary izolirani moduli. API omogu\u0107uje pristup funkcijama kao \u0161to su otkrivanje funkcionalnosti postoje\u0107ih vanjskih i ugra\u0111enih kamera, kori\u0161tenje profila ure\u0111aja, obrada doga\u0111aja povezivanja i isklju\u010divanja kamera, upravljanje snimanjem podataka s kamera na razini pojedina\u010dnih okvira i sinkronizacija snimaka s radom blica. Mogu\u0107e je odvojeno raditi s vi\u0161e kamera u sustavu i organizirati istovremeno snimanje nekoliko video streamova s jedne kamere (na primjer, jedan s niskom razlu\u010divosti za videokonferenciju, a drugi s visokom razlu\u010divosti za arhiviranje na disk). \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\udd47 Prvo izdanje libcamera, stack za podr\u0161ku kamerama u Linuxu | ProHoster","description":"Nakon \u010detiri godine razvoja, prvi je izdana verzija projekta libcamera 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Izvor: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"