N\u00e9gy \u00e9v fejleszt\u00e9s ut\u00e1n elk\u00e9sz\u00fclt a libcamera projekt els\u0151 kiad\u00e1sa (0.0.1), amely a videokamer\u00e1k, f\u00e9nyk\u00e9pez\u0151g\u00e9pek \u00e9s TV-tunerek Linux, Android \u00e9s ChromeOS k\u00f6rnyezetben val\u00f3 haszn\u00e1lat\u00e1ra k\u00edn\u00e1l szoftveres megold\u00e1st, \u00e9s folytatja a V4L2 API fejleszt\u00e9s\u00e9t, amelyet id\u0151vel felv\u00e1lt. Mivel a k\u00f6nyvt\u00e1r API-ja tov\u00e1bbra is v\u00e1ltozik \u00e9s m\u00e9g nem stabiliz\u00e1l\u00f3dott v\u00e9glegesen, a projekt eddig folytonos fejleszt\u00e9si modellben k\u00e9sz\u00fclt, an\u00e9lk\u00fcl, hogy elk\u00fcl\u00f6n\u00fclt kiad\u00e1sok j\u00f6ttek volna l\u00e9tre. A disztrib\u00faci\u00f3k API-j\u00e1nak v\u00e1ltoz\u00e1sainak nyomon k\u00f6vet\u00e9s\u00e9re, amelyek hat\u00e1ssal vannak a kompatibilit\u00e1sra \u00e9s a k\u00f6nyvt\u00e1r csomagokban val\u00f3 egyszer\u0171s\u00edtett sz\u00e1ll\u00edt\u00e1s\u00e1ra, mostant\u00f3l peri\u00f3dikus kiad\u00e1sok k\u00e9sz\u00edt\u00e9se mellett d\u00f6nt\u00f6ttek, amelyek t\u00fckr\u00f6zik az ABI \u00e9s API v\u00e1ltoz\u00e1sainak m\u00e9rt\u00e9k\u00e9t. A projekt k\u00f3dj\u00e1t C++ nyelven \u00edrt\u00e1k, \u00e9s LGPLv2.1 licenc alatt terjesztik. <\/p>\n
A projektet a Linux kernel multim\u00e9di\u00e1s alrendszerei\u00e9rt felel\u0151s fejleszt\u0151k ir\u00e1ny\u00edtj\u00e1k, egy\u00fcttm\u0171k\u00f6dve n\u00e9h\u00e1ny kameragy\u00e1rt\u00f3val, annak \u00e9rdek\u00e9ben, hogy normaliz\u00e1lj\u00e1k a helyzetet a Linux-ban a smartphone-okra \u00e9s be\u00e1gyazott eszk\u00f6z\u00f6kre vonatkoz\u00f3 kamer\u00e1k t\u00e1mogat\u00e1s\u00e1val, amelyek a proprietary meghajt\u00f3khoz k\u00f6t\u0151dnek. Az m\u00e1r megl\u00e9v\u0151 Linux kernel V4L2 API-t valamikor a hagyom\u00e1nyos elk\u00fcl\u00f6n\u00edtett webkamer\u00e1k haszn\u00e1lat\u00e1ra tervezt\u00e9k, \u00e9s rosszul van alkalmazva az ut\u00f3bbi id\u0151szakban megjelent tendencia, amely a funkci\u00f3k MCUs-r\u00f3l a CPU-ra val\u00f3 \u00e1thelyez\u00e9s\u00e9t c\u00e9lozza. <\/p>\n
A hagyom\u00e1nyos kamer\u00e1kkal ellent\u00e9tben, ahol a k\u00e9pek els\u0151dleges feldolgoz\u00e1sa a kamer\u00e1ba \u00e9p\u00edtett speci\u00e1lis processzoron (MCU) t\u00f6rt\u00e9nik, az be\u00e1gyazott eszk\u00f6z\u00f6k eset\u00e9ben a k\u00f6lts\u00e9gek cs\u00f6kkent\u00e9se \u00e9rdek\u00e9ben e funkci\u00f3kat a f\u0151 CPU v\u00e1llalja mag\u00e1ra, ami bonyolultabb illeszt\u0151programot ig\u00e9nyel, amely licencelt, nem nyilv\u00e1nos komponenseket tartalmaz. A libcamera projekt keret\u00e9ben a ny\u00edlt forr\u00e1sk\u00f3d\u00fa szoftver t\u00e1mogat\u00f3i \u00e9s az eszk\u00f6zgy\u00e1rt\u00f3k pr\u00f3b\u00e1ltak egy kompromisszumos megold\u00e1st l\u00e9trehozni, amely egyr\u00e9szt kiel\u00e9g\u00edti a ny\u00edlt szoftver fejleszt\u0151k ig\u00e9nyeit, m\u00e1sr\u00e9szt pedig v\u00e9di a kameragy\u00e1rt\u00f3k szellemi tulajdon\u00e1t. <\/p>\n
A libcamera \u00e1ltal javasolt verem teljesen felhaszn\u00e1l\u00f3i t\u00e9rben val\u00f3sul meg. A megl\u00e9v\u0151 programk\u00f6rnyezetek \u00e9s alkalmaz\u00e1sok kompatibilit\u00e1s\u00e1nak biztos\u00edt\u00e1sa \u00e9rdek\u00e9ben API V4L, Gstreamer \u00e9s Android Camera HAL kompatibilit\u00e1si r\u00e9tegek \u00e1llnak rendelkez\u00e9sre. A kamer\u00e1khoz specifikus, gy\u00e1rt\u00f3 \u00e1ltal biztos\u00edtott hardverinterakci\u00f3s komponenseket k\u00fcl\u00f6n f\u00e1zisokban, \u00f6n\u00e1ll\u00f3 folyamatokban val\u00f3s\u00edtj\u00e1k meg, \u00e9s az IPC-n kereszt\u00fcl l\u00e9pnek kapcsolatba a k\u00f6nyvt\u00e1rral. A modulok nem rendelkeznek k\u00f6zvetlen hozz\u00e1f\u00e9r\u00e9ssel az eszk\u00f6zh\u00f6z, \u00e9s az intermedi\u00e1lis API-n kereszt\u00fcl k\u00e9rik le a hardvert, ahol a k\u00e9rd\u00e9sek ellen\u0151rz\u00e9sre, sz\u0171r\u00e9sre \u00e9s a kamera m\u0171k\u00f6dtet\u00e9s\u00e9hez sz\u00fcks\u00e9ges funkci\u00f3kra val\u00f3 korl\u00e1toz\u00e1sra ker\u00fclnek. <\/p>\n
A k\u00f6nyvt\u00e1r emellett hozz\u00e1f\u00e9r\u00e9st biztos\u00edt a k\u00e9pek \u00e9s vide\u00f3k feldolgoz\u00e1s\u00e1ra \u00e9s min\u0151s\u00e9g\u00e9nek jav\u00edt\u00e1s\u00e1ra szolg\u00e1l\u00f3 algoritmusokhoz (feh\u00e9r balansz korrekci\u00f3, zajsz\u0171r\u00e9s, vide\u00f3stabiliz\u00e1l\u00e1s, automatikus \u00e9less\u00e9g\u00e1ll\u00edt\u00e1s, expoz\u00edci\u00f3 kiv\u00e1laszt\u00e1sa stb.), amelyeket ny\u00edlt k\u00fcls\u0151 k\u00f6nyvt\u00e1rakk\u00e9nt vagy gy\u00e1rt\u00f3i, elszigetelt modulokk\u00e9nt lehet csatlakoztatni. Az API hozz\u00e1f\u00e9r\u00e9st biztos\u00edt olyan funkci\u00f3khoz, mint a rendelkez\u00e9sre \u00e1ll\u00f3 k\u00fcls\u0151 \u00e9s be\u00e9p\u00edtett kamer\u00e1k m\u0171k\u00f6d\u00e9si jellemz\u0151inek meghat\u00e1roz\u00e1sa, az eszk\u00f6zprofilok haszn\u00e1lata, a kamer\u00e1k csatlakoztat\u00e1s\u00e1nak \u00e9s lecsatlakoztat\u00e1s\u00e1nak esem\u00e9nyeinek kezel\u00e9se, a kamer\u00e1k adatmegfigyel\u00e9s\u00e9nek ir\u00e1ny\u00edt\u00e1sa egyes k\u00e9pkock\u00e1k szintj\u00e9n \u00e9s a vaku m\u0171k\u00f6d\u00e9s\u00e9vel t\u00f6rt\u00e9n\u0151 f\u00e9nyk\u00e9pek szinkroniz\u00e1l\u00e1sa. Lehet\u0151v\u00e9 v\u00e1lik t\u00f6bb kamera k\u00fcl\u00f6n kezel\u00e9s\u00e9nek \u00e9s egy kamer\u00e1r\u00f3l egyszerre t\u00f6bb vide\u00f3folyam r\u00f6gz\u00edt\u00e9s\u00e9nek a megszervez\u00e9se (p\u00e9ld\u00e1ul egy alacsony felbont\u00e1s\u00fa videokonferenci\u00e1hoz, egy m\u00e1sik azonban magas felbont\u00e1s\u00fa arch\u00edv felv\u00e9telhez). \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\udd47A libcamera els\u0151 kiad\u00e1sa, a kamer\u00e1k t\u00e1mogat\u00e1s\u00e1\u00e9rt felel\u0151s verem Linuxon | 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\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 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Forr\u00e1s: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"