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

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*/'

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    #"/%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

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    #"/%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