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

Masaki Ogata
October 21, 2017
Technology
3
6.3k

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
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Transcript

  1. "CFNB57Λࢧ͑Δ ΞϓϦͷ༏͠͞

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  3. ༏͠͞ͱ͸ʁ

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

  5.  lࢥ͍΍Γ͕͋ͬͯ਌੾z  ग़య.BDࣙॻΞϓϦεʔύʔେࣙྛ

  6. ΞϓϦͷ༏͠͞ͱ͸

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  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໰୊

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

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  30.  ŧŖƃ

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  33. ͜ΕͰ໰୊ղফ

  34. ը໘ʹ࠷దͳϏοτϨʔτ੍ޚ

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

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

  38. ࢹௌ໘ͷύλʔϯ͕ෳࡶԽʜ

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

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  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