Kutulutsidwa kwa dav1d 0.6, decoder ya AV1 kuchokera kumapulojekiti a VideoLAN ndi FFmpeg

Magulu a VideoLAN ndi FFmpeg lofalitsidwa kutulutsidwa kwa laibulale ya dav1d 0.6.0 ndikukhazikitsa njira ina yaulere yosungira makanema AV1. Khodi ya pulojekitiyi imalembedwa m'chinenero cha C (C99) ndi ma assembler inserts (NASM/GAS) ndi wogawidwa ndi pansi pa layisensi ya BSD. Kuthandizira kwa zomangamanga za x86, x86_64, ARMv7 ndi ARMv8, ndi Linux, Windows, macOS, Android ndi iOS opareting'i sisitimu imayendetsedwa.

Laibulale ya dav1d imathandizira zonse za AV1, kuphatikiza zowonera zapamwamba zitsanzo ndi magawo onse owongolera kuya kwamitundu omwe adanenedwa muzofotokozera (8, 10 ndi 12 bits). Laibulale yayesedwa pagulu lalikulu la mafayilo mumtundu wa AV1. Chofunikira chachikulu cha dav1d ndikuyika kwake pakukwaniritsa magwiridwe antchito apamwamba kwambiri ndikuwonetsetsa kuti ntchito zamtundu wapamwamba zimagwira ntchito mwamitundu yambiri.

Mu mtundu watsopano:

• Kukhathamiritsa kwapadera kwa ARM64 kwakhazikitsidwa komwe kumagwira ntchito zambiri mukamagwira ntchito ndi kuya kwamitundu 10 ndi 12-bit.
• Zowonjezera kutengera malangizo a AVX-512 a prep_bilin, prep_8tap, cdef_filter ndi mc_avg/w_avg/mask operations.
• Kukhathamiritsa kowonjezera kutengera malangizo a SSSE3 kuti muchepetse phokoso la digito.
• Zowonjezera kutengera malangizo a AVX2 pa ntchito ya msac_adapt16.
• Kukonza zosemphana zomwe zimachitika kawirikawiri ndi decoder ya AV1;
• Kukhathamiritsa kwabwino kwa ntchito za msac, cdef ndi looprestoration za ARM64;
• Kukhathamiritsa kwa AVX2 kwa cdef_filter;
• Kagwiritsidwe ntchito ka itxfm ndi cdef_filter mu chilankhulo cha C akongoletsedwa.

Kumbukirani kuti kanema codec AV1 opangidwa ndi mgwirizano Tsegulani Media (AOMedia), yomwe ili ndi makampani monga Mozilla, Google, Microsoft, Intel, ARM, NVIDIA, IBM, Cisco, Amazon, Netflix, AMD, VideoLAN, Apple, CCN ndi Realtek. AV1 ili m'malo ngati mawonekedwe a kanema opezeka pagulu, opanda malipiro aulere omwe ali patsogolo pa H.264 ndi VP9 potengera kuchuluka kwa kukanikiza. Pazosankha zosiyanasiyana zoyesedwa, pafupifupi AV1 imapereka mulingo womwewo wamtundu pomwe imachepetsa ma bitrate ndi 13% poyerekeza ndi VP9 ndi 17% kutsika kuposa HEVC. Pa ma bitrate apamwamba, kupindula kumawonjezeka kufika 22-27% kwa VP9 ndi 30-43% kwa HEVC. M'mayesero a Facebook, AV1 inaposa mbiri yayikulu H.264 (x264) ndi 50.3% potengera msinkhu wa kukakamiza, mbiri yapamwamba ya H.264 ndi 46.2%, ndi VP9 (libvpx-vp9) ndi 34.0%.

Source: opennet.ru