AbemaTV iOSのダウンロード再生機能

Streaming Conference #2での発表資料です。
https://streaming-lab.connpass.com/event/79586/

Transcript

1. AbemaTV iOSͷ μ΢ϯϩʔυ࠶ੜػೳ Streaming Conference #2 Apr 25, 2018 Toshihiro Suzuki © Toshihiro Suzuki 2018 1
2. whoami ͱͬ͠ʔ @toshi0383 AbemaTV iOS / ഑৴ΫϥΠΞϯτ ࢹௌ඼࣭पΓͷR&D CWIP (Certified Widevine Implementation Partner) GT SPORT, F1 © Toshihiro Suzuki 2018 2
3. NABShowߦ͖ͬͯ·ͨ͠ © Toshihiro Suzuki 2018 3
4. ΞδΣϯμ — AbemaTVͷμ΢ϯϩʔυ࠶ੜػೳͱ͸ — AVAssetDownloadSession֓ཁ — ࣮૷ͷϋϚΓϙΠϯτ͍͔ͭ͘ © Toshihiro Suzuki 2018 4
5. AbemaTVͷμ΢ϯϩʔυ࠶ੜػೳͱ͸ — ΦϑϥΠϯ࠶ੜ μ΢ϯϩʔυ࠶ੜ — ࠶ੜ։࢝࣌ʹϝλσʔλऔಘͱDRMͷϥΠηϯεղ ܾͳͲ — μ΢ϯϩʔμͱͯ͠͸AVAssetDownloadSessionΛ࢖ ༻ — iOS11+ © Toshihiro Suzuki 2018 5
6. AVAssetDownloadSessionͱ͸ © Toshihiro Suzuki 2018 6
7. AVAssetDownloadSession֓ཁ1/2 — iOS10+ — URLSessionͷαϒΫϥε — ෳ਺ͷAVAssetDownloadTaskΛ؅ཧ — Session୯ҐͰWi-FiͷΈڐՄ͔Ͳ͏͔ࢦఆՄೳ — όοΫάϥ΢ϯυDLʹ΋ରԠ © Toshihiro Suzuki 2018 7
8. AVAssetDownloadSession֓ཁ2/2 — جຊతʹ͸λεΫ͸ฒྻʹ૸Δ — Playback while downloading͕͍͍ײ͡Ͱ͋Δ — DLΞηοτ͸ඞཁʹԠͯࣗ͡ಈͰύʔδ͞ΕΔ — [iOS11] AVAssetDownloadStorageManagementPolicy Ͱॏཁ౓ΛઃఆՄೳ © Toshihiro Suzuki 2018 8
9. AbemaTVಛ༗ͷ੍ޚ — 25੍݅ݶ — FGͰ͸ॱ൪ʹDL͞ΕΔΑ͏ʹsuspend/resume => Ϣʔβ͸͖ͬͱݟ͍ͨॱ൪ʹDL͢Δʹҧ͍ͳ͍ — ࠷ߴը࣭͸DLͤͯ͞ͳ͍ master playlistΛύʔεͯ͠720p/480pͷplaylistͲͪ Β͔ΛDL © Toshihiro Suzuki 2018 9
10. ౰ॳͷ༧૝ © Toshihiro Suzuki 2018 10
11. Android͸μ΢ϯϩʔμΛϑϧεΫϥον iOS͸SDKͰΠʔδʔϞʔυ iOS͸1ϲ݄͘Β͍ૣ͘ऴΘΔͬ͠ΐ © Toshihiro Suzuki 2018 11
12. ݁Ռ Android͸μ΢ϯϩʔμΛϑϧεΫϥονͯ͠Δ͏ͪʹ ExoPlayerʹμ΢ϯϩʔμ࣮૷͞ΕͨΒ݁͘͠ہͦͬͪ Λ࠾༻ ʹ΋ؔΘΒͣiOS͸Androidͱಉ͘͡Β͍Ͱண஍ɻ © Toshihiro Suzuki 2018 12
13. Ͳ͏ͯ͜͠͏ͳͬͨ — ઌʹ࣮૷͕ਐΉͱ࢓༷ΛܾΊͳ͕ΒʹͳΔͷͰ଎౓ ͕མͪΔ — AVFoundation͕ϒϥοΫϘοΫε ҙਤ௨Γಈ͔ͳ͍৔߹ʹσόοά͕೉ߤ͕ͪ͠ © Toshihiro Suzuki 2018 13
14. ϋϚΓϙΠϯτ © Toshihiro Suzuki 2018 14
15. [ϋϚΓϙΠϯτͦͷ0] URLSessionConfigurationͷύϥϝʔλ͸ػೳ͠ͳ͍΋ ͘͠͸۩ମతͳڍಈ͕ෆ໌֬΋ͷ͕΄ͱΜͲ - timeoutIntervalForResource ... ࣮ࡍʹtimeout௒͑ͯ ΋࡟আ͞ΕΔ͜ͱ͸ͳ͔ͬͨ - httpMaximumConnectionsPerHost ... ػೳ͠ͳ͍ © Toshihiro Suzuki 2018 15
16. [ϋϚΓϙΠϯτͦͷ1] 403ʹͳͬͨ৔߹ɺλεΫ͕runningͷ··Ԡ౴͠ͳ͘ ͳΔ μ΢ϯϩʔμͱͯ͠ݫີʹڍಈΛ୲อ͢Δʹ͸ɺࣄલʹ HEADϦΫΤετ͢ΔͳͲରԠ͕ඞཁͦ͏ © Toshihiro Suzuki 2018 16
17. [ϋϚΓϙΠϯτͦͷ2] assetTitle໰୊ assetTitleʹಛఆͷจࣈΛࢦఆ͢Δͱtask͕Τϥʔʹ ͳΔorਐ·ͳ͍ # όάϨϙࡁΈ © Toshihiro Suzuki 2018 17
18. [ϋϚΓϙΠϯτͦͷ3] ΞϓϦΩϧ໰୊ DLதʹΞϓϦΩϧ͢Δͱtask͕Ωϟϯηϧ͞ΕΔ. ෮ݩ ͸ෆՄೳ. © Toshihiro Suzuki 2018 18
19. [ϋϚΓϙΠϯτͦͷ3] ΞϓϦΩϧ໰୊ Apple: ʮΞϓϦΩϧͨͬͯ͜͠ͱ͸ɺλεΫΩϟϯη ϧ͍ͨͬͯ͜͠ͱͬ͠ΐʯ https://developer.apple.com/library/content/ documentation/iPhone/Conceptual/ iPhoneOSProgrammingGuide/BackgroundExecution/ BackgroundExecution.html # όάϨϙࡁΈ © Toshihiro Suzuki 2018 19
20. [ϋϚΓϙΠϯτͦͷ4] iOS10໰୊ iOS10ͷΈɺಛఆͷίϯςϯπͰDL͕100%ࣦഊ͢Δ ੾Γ෼͚͢Δ͕࣌ؒ໪ମແ͍ͷͰiOS10ରԠࣗମݟૹΔ ͜ͱʹ © Toshihiro Suzuki 2018 20
21. ໰୊ࢁੵ ͍ͬͦεΫϥον͢Δํ͕ɻɻ — AVPlayer͕ϩʔΧϧύεΛड͚෇͚ͯ͘Εͳ͍ͨΊ ϫʔΫΞϥ΢ϯυ͕ඞཁ ͳͲͷ՝୊ ࠓճ͸ରԠݟૹΓ © Toshihiro Suzuki 2018 21
22. ·ͱΊ — AVAssetDownloadSession͸OSͷαϙʔτ͕ड͚ΒΕ ͯศར — ඞͣ͠΋ΠʔδʔϞʔυͰ͸ͳ͍͔΋ © Toshihiro Suzuki 2018 22
23. ืू Ұॹʹಇ͘஥ؒΛืू͍ͯ͠·͢ Χʔτ஥ؒ΋ืू͍ͯ͠·͢ © Toshihiro Suzuki 2018 23
24. End ! © Toshihiro Suzuki 2018 24
25. Toshihiro Suzuki Twitter: @toshi0383 GitHub: @toshi0383 Qiita: @toshi0383 Email: t.suzuki326@gmail.com © Toshihiro Suzuki 2018 25