Upgrade to Pro — share decks privately, control downloads, hide ads and more …

AbemaTVを支えるアプリの優しさ / abematv_devcon_2017

Masaki Ogata
October 21, 2017
Technology
3
6.5k

AbemaTVを支えるアプリの優しさ / abematv_devcon_2017

ネットワーク帯域などの限られたシステムリソースを節約するために、Androidアプリで取り組んでいる優しさをいくつか紹介します。

Masaki Ogata

October 21, 2017
Tweet

More Decks by Masaki Ogata

See All by Masaki Ogata
Jetpack Composeで始めるServer Cache State
ogaclejapan
2
210
Architecture Components - Lifecycle library
ogaclejapan
3
2.4k
How to keep data between orientation changes
ogaclejapan
7
2.5k
Your app name
ogaclejapan
1
2.9k
Flux de Relax :)
ogaclejapan
13
61k
Dagger2 has been released!
ogaclejapan
3
3.2k

Other Decks in Technology

See All in Technology
初めてのPostgreSQLメジャーバージョンアップ
kkato1
0
520
Amazon Q Developer 他⽣成AIと⽐較してみた
takano0131
1
140
AWSエンジニアがSAPのデータ抽出してみた
mayumi_hirano
0
110
20250325_Logic Apps / Power Automate の SharePoint コネクタの裏側を知る 〜Graph APIで直接操作してみよう〜
yutakaosada
0
110
AIエージェントキャッチアップと論文リサーチ
os1ma
6
1.3k
FinOps_Demo
tkhresk
0
110
「家族アルバム みてね」を支えるS3ライフサイクル戦略
fanglang
4
540
お問い合わせ対応の改善取り組みとその進め方
masartz
1
560
AIエージェントの地上戦 〜開発計画と運用実践 / 2025/04/08 Findy W&Bミートアップ #19
smiyawaki0820
17
4.2k
PostgreSQL Unconference #52 pg_tde
nori_shinoda
1
250
Agile TPIを活用した品質改善事例
tomasagi
0
550
デザインシステムのレガシーコンポーネントを刷新した話/Design System Legacy Renewal
kaonavi
0
120

Featured

See All Featured
The Illustrated Children's Guide to Kubernetes
chrisshort
48
49k
Intergalactic Javascript Robots from Outer Space
tanoku
270
27k
Sharpening the Axe: The Primacy of Toolmaking
bcantrill
40
2.1k
Creating an realtime collaboration tool: Agile Flush - .NET Oxford
marcduiker
29
2k
Dealing with People You Can't Stand - Big Design 2015
cassininazir
367
25k
Fight the Zombie Pattern Library - RWD Summit 2016
marcelosomers
233
17k
Speed Design
sergeychernyshev
28
870
Building Adaptive Systems
keathley
41
2.5k
Faster Mobile Websites
deanohume
306
31k
4 Signs Your Business is Dying
shpigford
183
22k
Rails Girls Zürich Keynote
gr2m
94
13k
Put a Button on it: Removing Barriers to Going Fast.
kastner
60
3.8k

Transcript

  1. "CFNB57Λࢧ͑Δ ΞϓϦͷ༏͠͞

  2. .BTBLJ0HBUB "OESPJE&OHJOFFS"CFNB57 *OD IUUQTHJUIVCDPNPHBDMFKBQBO !PHBDMFKBQBO

  3. ༏͠͞ͱ͸ʁ

  4. Զࢯɿʮ͍ͨͩ·ʔʯ Շࢯɿʮ͓ؼΓʔɺ͝൧࡞ͬͯ͋ΔΑɻʯ Զࢯɿʢ೥ʹҰ౓ͷح੻ʜʣ༏͠͞ʂʂ 

  5.  lࢥ͍΍Γ͕͋ͬͯ਌੾z  ग़య.BDࣙॻΞϓϦεʔύʔେࣙྛ

  6. ΞϓϦͷ༏͠͞ͱ͸

  7. ωοτϫʔΫ௨৴Λ͍ͩ͡ʹ ΞϓϦͷͤ͘͞ΜGPS6TFS όοςϦʔΛ͔ͭ͏ͳ ΨϯΨϯ͍͜͏ͥ Ξχϝʔγϣϯͤ͞Ζ

  8. 6*ʗ69Λ͍ͩ͡ʹ ΞϓϦͷͤ͘͞ΜGPS4ZTUFN ωοτϫʔΫଳҬΛ࢖͏ͳ Ωϟογϡ͠Α͏ͥ ௿ίετͰӡ༻ͤ͞Ζ

  9.  lωοτϫʔΫ௨৴ྔΛ཈͑Δz  "CFNB57ΞϓϦͷ༏͠͞

  10. "CFNB57Λࢧ͑Δ ΞϓϦͷ༏͠͞  ʙ"OESPJEΞϓϦͷऔΓ૊Έʙ

  11. ͕ɺɺ

  12. ݄๭೔ɻ ⚡࣌ؒੜ์ૹಛ൪ܾఆ⚡

  13. ෛՙରࡦΛਐΊͨ݁Ռɺ

  14. ༏͠͞ʹෆඋ͕͋Γ·ͨ͠

  15. "CFNB57Λࢧ͑Δ ΞϓϦͷ༏͠͞

  16. "CFNB57Λࢧ͑Δ ΞϓϦͷ༏͠͞ XJUI

  17. ϓϨΠϦετऔಘ͠ա͗໰୊

  18. )-4ʢ)551-JWF4USFBNJOHʣ QMBZMJTU@MJWFNV &95.6 &9597&34*0/ &9595"3(&5%63"5*0/ &959.&%*"4&26&/$& &95*/'  UT &95*/'

     UT &95*/'  UT

  19. )-4ʢ)551-JWF4USFBNJOHʣ QMBZMJTU@MJWFNV &95.6 &9597&34*0/ &9595"3(&5%63"5*0/ &959.&%*"4&26&/$& &95*/'  UT &95*/'

     UT &95*/'  UT UT

  20. )-4ʢ)551-JWF4USFBNJOHʣ QMBZMJTU@MJWFNV &95.6 &9597&34*0/ &9595"3(&5%63"5*0/ &959.&%*"4&26&/$& &95*/'  UT &95*/'

     UT &95*/'  UT UT UT

  21. )-4ʢ)551-JWF4USFBNJOHʣ QMBZMJTU@MJWFNV &95.6 &9597&34*0/ &9595"3(&5%63"5*0/ &959.&%*"4&26&/$& &95*/'  UT &95*/'

     UT &95*/'  UT UT UT UT

  22. )-4ʢ)551-JWF4USFBNJOHʣ QMBZMJTU@MJWFNV &95.6 &9597&34*0/ &9595"3(&5%63"5*0/ &959.&%*"4&26&/$& &95*/'  UT &95*/'

     UT &95*/'  UT UT UT UT

  23. )-4ʢ)551-JWF4USFBNJOHʣ QMBZMJTU@MJWFNV &95.6 &9597&34*0/ &9595"3(&5%63"5*0/ &959.&%*"4&26&/$& &95*/'  UT &95*/'

     UT &95*/'  UT UT UT UT UT

  24. )-4"EBQUJWF4USFBNJOH NBTUFS@QMBZMJTUNV &95.6 &959ʜ #"/%8*%5) QMBZMJTU@MJWFNV &959ʜ #"/%8*%5) QMBZMJTU@MJWFNV &959ʜ

    #"/%8*%5) QMBZMJTU@MJWFNV &959ʜ #"/%8*%5) QMBZMJTU@MJWFNV &959ʜ #"/%8*%5) QMBZMJTU@MJWFNV

  25. )-4"EBQUJWF4USFBNJOH NBTUFS@QMBZMJTUNV &95.6 &959ʜ #"/%8*%5) QMBZMJTU@MJWFNV &959ʜ #"/%8*%5) QMBZMJTU@MJWFNV &959ʜ

    #"/%8*%5) QMBZMJTU@MJWFNV &959ʜ #"/%8*%5) QMBZMJTU@MJWFNV &959ʜ #"/%8*%5) QMBZMJTU@MJWFNV NV Q

  26. )-4"EBQUJWF4USFBNJOH NBTUFS@QMBZMJTUNV &95.6 &959ʜ #"/%8*%5) QMBZMJTU@MJWFNV &959ʜ #"/%8*%5) QMBZMJTU@MJWFNV &959ʜ

    #"/%8*%5) QMBZMJTU@MJWFNV &959ʜ #"/%8*%5) QMBZMJTU@MJWFNV &959ʜ #"/%8*%5) QMBZMJTU@MJWFNV NV Q NV Q

  27. ֤σόΠεͷϓϨΠϦετऔಘִؒ ϥΠϒ഑৴Ͱ54ϑΝΠϧͷηάϝϯτִ͕ؒඵͷ৔߹ɻ 1$ 8&# J04 "OESPJE

  28. ֤σόΠεͷϓϨΠϦετऔಘִؒ ϥΠϒ഑৴Ͱ54ϑΝΠϧͷηάϝϯτִ͕ؒඵͷ৔߹ɻ 1$ 8&# J04 "OESPJE ໿ඵִؒ ໿ඵִؒ

  29. ֤σόΠεͷϓϨΠϦετऔಘִؒ ϥΠϒ഑৴Ͱ54ϑΝΠϧͷηάϝϯτִ͕ؒඵͷ৔߹ɻ 1$ 8&# J04 "OESPJE ໿ඵִؒ ໿ඵִؒ ໿ ඵִؒ

  30.  ŧŖƃ

  31. ݁࿦ɺ&YP1MBZFSͷෆ۩߹Ͱͨ͠ɻɻ IUUQTHJUIVCDPNHPPHMF &YP1MBZFSQVMM

  32. ߴϏοτϨʔτ΁੾ΓସΘΓޙ΋Q͕औಘ͞Εଓ͚͍ͯͨ NBTUFS@QMBZMJTUNV &95.6 &959ʜ #"/%8*%5) QMBZMJTU@MJWFNV &959ʜ #"/%8*%5) QMBZMJTU@MJWFNV &959ʜ

    #"/%8*%5) QMBZMJTU@MJWFNV &959ʜ #"/%8*%5) QMBZMJTU@MJWFNV &959ʜ #"/%8*%5) QMBZMJTU@MJWFNV NV Q NV Q

  33. ͜ΕͰ໰୊ղফ

  34. ը໘ʹ࠷దͳϏοτϨʔτ੍ޚ

  35. "CFNB57։ہ౰ॳ೥݄ ΞϓϦ͸ԣը໘ݻఆͰࢹௌ໘ͷը໘αΠζ΋ύλʔϯͷΈɻ

  36. "CFNB57։ہप೥೥݄ ΞϓϦ͸ैདྷͷԣը໘ʹՃ͑ɺॎը໘Ͱͷࢹௌʹ΋ରԠɻ

  37. "CFNB57։ہप೥೥݄ ͞Βʹɺ"OESPJE৽ػೳͷϚϧν΢Οϯυ΢Ͱ΋ࢹௌՄೳʹɻ

  38. ࢹௌ໘ͷύλʔϯ͕ෳࡶԽʜ

  39. )-4"EBQUJWF4USFBNJOH NBTUFS@QMBZMJTUNV &95.6 &959ʜ #"/%8*%5) QMBZMJTU@MJWFNV &959ʜ #"/%8*%5) QMBZMJTU@MJWFNV &959ʜ

    #"/%8*%5) QMBZMJTU@MJWFNV &959ʜ #"/%8*%5) QMBZMJTU@MJWFNV &959ʜ #"/%8*%5) QMBZMJTU@MJWFNV NV Q NV Q

  40. )-4"EBQUJWF4USFBNJOH NBTUFS@QMBZMJTUNV &95.6 &959ʜ #"/%8*%5) QMBZMJTU@MJWFNV &959ʜ #"/%8*%5) QMBZMJTU@MJWFNV &959ʜ

    #"/%8*%5) QMBZMJTU@MJWFNV &959ʜ #"/%8*%5) QMBZMJTU@MJWFNV &959ʜ #"/%8*%5) QMBZMJTU@MJWFNV NV Q NV Q Q 'VMM)% Y

  41. )-4"EBQUJWF4USFBNJOH NBTUFS@QMBZMJTUNV &95.6 &959ʜ #"/%8*%5) QMBZMJTU@MJWFNV &959ʜ #"/%8*%5) QMBZMJTU@MJWFNV &959ʜ

    #"/%8*%5) QMBZMJTU@MJWFNV &959ʜ #"/%8*%5) QMBZMJTU@MJWFNV &959ʜ #"/%8*%5) QMBZMJTU@MJWFNV NV Q NV Q Y Q 'VMM)% Y

  42. )-4"EBQUJWF4USFBNJOH NBTUFS@QMBZMJTUNV &95.6 &959ʜ #"/%8*%5) QMBZMJTU@MJWFNV &959ʜ #"/%8*%5) QMBZMJTU@MJWFNV &959ʜ

    #"/%8*%5) QMBZMJTU@MJWFNV &959ʜ #"/%8*%5) QMBZMJTU@MJWFNV &959ʜ #"/%8*%5) QMBZMJTU@MJWFNV NV Q NV Q Y Q 'VMM)% Y , ໿ഒͷ௨৴ྔʜ

  43. )-4"EBQUJWF4USFBNJOH NBTUFS@QMBZMJTUNV &95.6 &959ʜ #"/%8*%5) QMBZMJTU@MJWFNV &959ʜ #"/%8*%5) QMBZMJTU@MJWFNV &959ʜ

    #"/%8*%5) QMBZMJTU@MJWFNV &959ʜ #"/%8*%5) QMBZMJTU@MJWFNV &959ʜ #"/%8*%5) QMBZMJTU@MJWFNV NV Q NV Q Y Q 'VMM)% Y Q )% Y

  44. "CFNB57ΞϓϦͷϏοτϨʔτ੍ޚʢ"OESPJEʣ ͍͔ͭ͘ͷ৚݅Λ૊Έ߹ΘͤͯϏοτϨʔτΛಈతʹมߋ͍ͯ͠Δɻ ը࣭ઃఆ ௨৴ճઢ ը໘෯ ࣗಈ ࠷ߴը࣭ ߴը࣭ ʜ 8*'*

    .PCJMF ʜ 8JOEPX෯ 7JFX෯ ʜ 04WFS YPSIJHIFS Y ʜ

  45. public class VideoBitrateAdjuster { private final VideoBitrateTable auto = new

    AutoBitrateTable(); private final VideoBitrateTable legacy = new LegacyBitrateTable(); private final VideoBitrateTable manual = new ManualBitrateTable(); public VideoBitrate adjust(@Px int w, VideoQuality quality, NetworkState network) { if (quality == AUTO) { if (isLegacyPlatform()) { return legacy.lookup(w, quality, network); } else { return auto.lookup(w, quality, network); } } else { return manual.lookup(w, quality, network); } } "CFNB57ΞϓϦͷϏοτϨʔτ੍ޚʢ"OESPJEʣ ˞αϯϓϧίʔυͰ͢

  46. "CFNB57ΞϓϦͷϏοτϨʔτ੍ޚʢ"OESPJEʣ public class LimitedBandwidthMeter implements BandwidthMeter { ... public setMaxBitrate(long

    bitrate) { ... } public long getBitrateEstimate() { return Math.min(bitrateEstimate, maxBitrate); } ... } package com.google.android.exoplayer2.upstream; public interface BandwidthMeter { long getBitrateEstimate(); } ˞αϯϓϧίʔυͰ͢

  47. "CFNB57ΞϓϦͷϏοτϨʔτ੍ޚʢ"OESPJEʣ VideoBitrateAdjuster PlayerBitrateChanger LimitedBandwidthMeter ExoPlayer NV UT

  48. "CFNB57ΞϓϦͷϏοτϨʔτ੍ޚʢ"OESPJEʣ VideoBitrateAdjuster PlayerBitrateChanger LimitedBandwidthMeter ExoPlayer "650 8*'* QY NV UT

  49. "CFNB57ΞϓϦͷϏοτϨʔτ੍ޚʢ"OESPJEʣ VideoBitrateAdjuster PlayerBitrateChanger LimitedBandwidthMeter ExoPlayer "650 8*'* QY NV UT

  50. "CFNB57ΞϓϦͷϏοτϨʔτ੍ޚʢ"OESPJEʣ VideoBitrateAdjuster PlayerBitrateChanger LimitedBandwidthMeter ExoPlayer "650 8*'* QY Q NV

    UT

  51. "CFNB57ΞϓϦͷϏοτϨʔτ੍ޚʢ"OESPJEʣ VideoBitrateAdjuster PlayerBitrateChanger LimitedBandwidthMeter ExoPlayer "650 8*'* QY Q CQT

    NV UT

  52. "CFNB57ΞϓϦͷϏοτϨʔτ੍ޚʢ"OESPJEʣ VideoBitrateAdjuster PlayerBitrateChanger LimitedBandwidthMeter ExoPlayer "650 8*'* QY Q CQT

    NBY#JUSBUFQ NV UT

  53. "CFNB57ΞϓϦͷϏοτϨʔτ੍ޚʢ"OESPJEʣ VideoBitrateAdjuster PlayerBitrateChanger LimitedBandwidthMeter ExoPlayer "650 8*'* QY Q CQT

    NBY#JUSBUFQ NV UT

  54. "CFNB57ΞϓϦͷϏοτϨʔτ੍ޚʢ"OESPJEʣ VideoBitrateAdjuster PlayerBitrateChanger LimitedBandwidthMeter ExoPlayer "650 8*'* QY Q CQT

    NBY#JUSBUFQ NV UT

  55. "CFNB57ΞϓϦͷϏοτϨʔτ੍ޚʢ"OESPJEʣ VideoBitrateAdjuster PlayerBitrateChanger LimitedBandwidthMeter ExoPlayer "650 8*'* QY Q CQT

    NBY#JUSBUFQ NV UT Q

  56. "CFNB57ΞϓϦͷϏοτϨʔτ੍ޚʢ"OESPJEʣ VideoBitrateAdjuster PlayerBitrateChanger LimitedBandwidthMeter ExoPlayer "650 8*'* QY Q CQT

    NBY#JUSBUFQ NV UT Q Q

  57. "CFNB57ΞϓϦͷϏοτϨʔτ੍ޚʢ"OESPJEʣ VideoBitrateAdjuster PlayerBitrateChanger LimitedBandwidthMeter ExoPlayer "650 .0#*-& QY Q CQT

    NBY#JUSBUFQ NV UT Q Q

  58. "CFNB57ΞϓϦͷϏοτϨʔτ੍ޚʢ"OESPJEʣ VideoBitrateAdjuster PlayerBitrateChanger LimitedBandwidthMeter ExoPlayer "650 .0#*-& QY Q CQT

    NBY#JUSBUFQ NV UT Q Q

  59. "CFNB57ΞϓϦͷϏοτϨʔτ੍ޚʢ"OESPJEʣ VideoBitrateAdjuster PlayerBitrateChanger LimitedBandwidthMeter ExoPlayer "650 .0#*-& QY Q CQT

    NBY#JUSBUFQ NV UT Q Q

  60. "CFNB57ΞϓϦͷϏοτϨʔτ੍ޚʢ"OESPJEʣ VideoBitrateAdjuster PlayerBitrateChanger LimitedBandwidthMeter ExoPlayer "650 .0#*-& QY Q CQT

    NBY#JUSBUFQ NV UT Q Q

  61. "CFNB57ΞϓϦͷϏοτϨʔτ੍ޚʢ"OESPJEʣ VideoBitrateAdjuster PlayerBitrateChanger LimitedBandwidthMeter ExoPlayer "650 .0#*-& QY Q CQT

    NBY#JUSBUFQ NV UT Q Q

  62. "CFNB57ΞϓϦͷϏοτϨʔτ੍ޚʢ"OESPJEʣ VideoBitrateAdjuster PlayerBitrateChanger LimitedBandwidthMeter ExoPlayer "650 .0#*-& QY Q CQT

    NBY#JUSBUFQ NV UT Q Q

  63. "CFNB57ΞϓϦͷϏοτϨʔτ੍ޚʢ"OESPJEʣ VideoBitrateAdjuster PlayerBitrateChanger LimitedBandwidthMeter ExoPlayer "650 .0#*-& QY Q CQT

    NBY#JUSBUFQ NV UT Q Q

  64. "CFNB57ΞϓϦͷϏοτϨʔτ੍ޚʢ"OESPJEʣ VideoBitrateAdjuster PlayerBitrateChanger LimitedBandwidthMeter ExoPlayer "650 .0#*-& QY Q CQT

    NBY#JUSBUFQ NV UT Q Q

  65. "CFNB57ΞϓϦͷϏοτϨʔτ੍ޚʢ"OESPJEʣ VideoBitrateAdjuster PlayerBitrateChanger LimitedBandwidthMeter ExoPlayer "650 .0#*-& QY Q CQT

    NBY#JUSBUFQ NV UT Q Q

  66. ͢΂ͯ͸௨৴ྔΛ཈͑ΔͨΊ

  67. ·ͱΊ

  68. ·ͱΊ wϓϨΠϦετऔಘ͠ա͗໰୊ ࠷৽ͷ&YP1MBZFSʢSʣΛར༻͢Ε͹ղফͰ͖Δɻ wը໘ʹ࠷దͳϏοτϨʔτ੍ޚ ଳҬ্ݶΛઃఆ͢Δ͜ͱͰແବͳ௨৴ྔΛ཈͑Δ͜ͱ͕Ͱ͖Δɻ

  69. ͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ɻ

  70. 8F`SFIJSJOH IUUQTBCFNBHO[SBT