FLAC inoshandisa nzira dzisina kurasikirwa dze encoding, iyo inovimbisa kuchengetedzwa kwakazara kwemhando yekutanga
Makore mapfumbamwe mushure mekunge tambo yekupedzisira yaiswa zvakakosha, iyo Xiph.Org nharaunda yakaunza imwe shanduro itsva yeFLAC 1.4.0 codec iyo inopa isina kurasikirwa audio encoding.
Kune avo vasingazive nezve FLAC, iwe unofanirwa kuziva izvozvo iyi ifomati yakazaruka yekufambisa, izvo zvinoreva kwete chete kuvhurika kwemaraibhurari nekushandiswa kweiyo encoding uye decoding mabasa, asiwo kusavapo kwezvirambidzo pakushandiswa kwezvirevo uye kusikwa kwezvinobvamo zvekodhi reraibhurari.
FLAC yakagadzirirwa kumanikidza odhiyo. Nekuda kweizvi, mafaera anokonzeresa anotamba uye anogona kushandiswa, pamwe nekuve madiki pane kana statistical compression algorithm (yakadai seZIP) yaiswa yakananga kuPCM faira.
FLAC yave imwe yeanofarira mafomati yekutengeswa kwemimhanzi paInternet, pamwe neMonkey's Audio iyo inoshanda zvakafanana. Mukuwedzera, inoshandiswa mukutsinhana nziyo pamusoro petiweki, seimwe nzira yeMP3, kana iwe uchida kuwana kuderedzwa kukuru kwehukuru pane WAV-PCM faira, uye kwete kurasikirwa neruzha rwemhando. Panguva imwecheteyo, nzira dzisingarasikike dzekumanikidza dzinoshandiswa dzinobvumira saizi yekuyerera kwekutanga kuderedzwa ne50-60%.
Nhau huru dzeFLAC 1.4.0
Mune iyo nyowani vhezheni yecodec inoratidzwa, inosimbiswa iyo yakawedzera rutsigiro rwe encode uye decode nekudzika zvishoma de 32 bits per sample quantization.
Chimwe chitsva chinoperekedza kutangwa kweiyi vhezheni itsva ndechekuti yakavandudzwa kudzvanya kushanda pamazinga 3 kusvika 8 pamutengo wekudzikisa zvishoma mukumhanyisa encoding nekuda kwekuvandudzwa kwe autocorrelation computation.
Mukuwedzera kune izvi, zvinoonekwawo kuti raibhurari libFLAC uye iyo flac utility, mushanduro itsva iyi kupa kugona kudzikamisa bit rate hushoma hwemafaira eFLAC, anosvika chikamu chimwe chete pamuenzaniso (inogona kubatsira kana uchitambira nzizi dzepamoyo).
Tambien kumhanya kwepamusoro encoding kwave kuwanikwa kumatanho 0, 1 uye 2, pamwe chete nekutsikirirwa kwakavandudzwa pamazinga 1 kusvika ku4 nekushandura adaptive heuristics, uye zvakazogoneka kukodha mafaera ane sampuli mareti kusvika ku1048575 Hz.
Kune rumwe rutivi, zvakare inocherechedzwa kuti iyo Kumhanyisa kumhanya kwakavandudzwa zvakanyanya pa8-bit ARMv64 processors, nekuda kwekushandiswa kweNEON mirairo. Kuvandudzwa kwekuita pane x86_64 processors inotsigira iyo FMA yekuraira set.
Yeimwe shanduko izvo zvinoratidzika kubva pane iyi nyowani vhezheni:
- Iyo API neABI ye libFLAC uye libFLAC++ maraibhurari akachinjwa (kusimudzira kushanduro 1.4 kunoda kuti zvikumbiro zvivakwezve).
- Yakarambwa uye ichabviswa mune inotevera vhezheni yeplugin yeXMMS.
- Iyo flac utility ine sarudzo nyowani "-limit-min-bitrate" uye "-chengeta-kunze-metadata-kana-iripo".
- Iko kudzvanywa kwe presets -1 uye -4 yakagadziridzwa zvishoma pane zvimwe zvinhu nekushandura yepakati-side adaptive heuristic.
- Yakabatanidzwa inomhanyisa kumhanya yakanangana ne8-bit ARMv64 zvishandiso uchishandisa NEON (Ronen Gvili, Martijn van Beurden)
- Yakawedzera kumhanya kwex86_64 CPUs ine FMA yekuraira set yekuwedzera
- Izvozvi zvinogoneka encode uye decode 32-bit PCM
- Gadzirisa nyaya uchishandisa parse ficha yakakonzeresa kuti furemu yekutanga ive nehukuru husina kunaka uye kugadzirisa
- MSVC uye Makefile.lite kuvaka system mafaira akabviswa. Kuvaka neMSVC (Visual Studio) kunogona kuitwa uchishandisa CMake
- Kuwedzerwa kweiyo fuzzer decoder nyowani, kuwedzera yekutarisa kodhi yekuvhara
- Yambiro yakadzoserwa nekubata metadata yekunze ikozvino yave kujeka kana mushandisi anoedza kudzoreredza metadata yekunze yerudzi rusina kunaka, semuenzaniso nekunyora faira reFLAC rine metadata yeAIFF yekunze mufaira reWAV.
Finalmente kana iwe uchifarira kuziva zvakawanda nezvazvo, unogona kutarisa ruzivo Mune inotevera chinongedzo.