オーディオ波形を表示するために知っておくべきこと

iOSDC2021発表資料

Transcript

1. :VLJ:BTPTIJNB!ZBTP@TBO
   ΦʔσΟΦ೾ܗΛදࣔ͢ΔͨΊʹ
   ஌͓ͬͯ͘΂͖͜ͱ
   J04%$
   

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2. ࿩͢಺༰
   w ΦʔσΟΦͷσʔλܗࣜ
   w طଘͷΞϓϦͷ೾ܗදࣔ
   w ೾ܗ༻σʔλ΁ͷม׵
   w ύϑΥʔϚϯεͷߟྀ
   w .FUBMΛ࢖ͬͨ೾ܗඳը
   

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3. w ΦʔσΟΦͷ೾ܗ͸ʮϦχΞ1$.ʯͷΦʔσΟΦσʔλΛ΋ͱʹදࣔ͞Εͯ
   ͍Δ
   w .1΍""$ͳͲͷѹॖϑΝΠϧ΋ɺϝϞϦ্Ͱѻ͏࣌ʹ͸ʮϦχΞ1$.ʯͷ
   σʔλʹม׵͞ΕΔ
   ΦʔσΟΦ೾ܗͱݩσʔλ
   

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4. ϦχΞ1$.
   -JOFBS1VMTF$PEF.PEVMBUJPOʢϦχΞύϧεූ߸มௐʣ
   ৴߸ͷৼ෯ΛఆظతͳִؒͰαϯϓϦϯάͨ͠σʔλܗࣜ
   

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5. w αϯϓϦϯάप೾਺
   w ඪຊ஋ͷܕ
   w νϟϯωϧ਺ͱฒͼॱ
   ϦχΞ1$.
   ϑΥʔϚοτ
   

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6. Ξφϩά৴߸
   ࣌ؒ
   ৼ෯
   ʴ
   —
   
   

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7. Ξφϩά৴߸
   ඵ
   

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8. αϯϓϦϯά
   αϯϓϦϯάप೾਺)[
   ඵʹ͖ͭՕॴͰαϯϓϦϯά
   

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9. σδλϧσʔλ
   ؒͷ৘ใ͸ൈ͚མͪΔ
   

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10. ඪຊ஋
    ඪຊ஋ʢαϯϓϧʣ
    

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11. ඪຊ஋
    ʢ࠷େ஋ʣ
    ʢ࠷খ஋ʣ
    
    
    
    fl
    PBUͷ৔߹
    

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12. ඪຊ஋
    
    fl
    PBUͷ৔߹
    σδλϧ্Ͱ͸Λ௒͑ͯ΋େৎ෉
    Ξφϩάʹม׵͢Δͱ͖͸ΫϦοϓ͢Δ
    
    

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13. ඪຊ஋
    
    
    
    
    
    *OUͷ৔߹
    

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14. νϟϯωϧ
    DIεςϨΦ
    DIαϥ΢ϯυ
    ʢ࣮ࡍ͸DIʣ
    DIϞϊϥϧ
    

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15. ෳ਺νϟϯωϧͷσʔλͷฒͼ
    DIͷ৔߹
    w /PO*OUFSMFBWFEʢผʑͷόοϑΝʹ෼͔ΕΔʣ
    w *OUFSMFBWFEʢҰͭͷόοϑΝʣ
    

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16. ෳ਺νϟϯωϧͷσʔλͷฒͼ
    - - - - - - - -
    ഑ྻ-
    3 3 3 3 3 3 3 3
    ഑ྻ3
    /PO*OUFSMFBWFEʢผʑͷόοϑΝʣ
    
    
    DIͷ৔߹
    

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17. ෳ਺νϟϯωϧͷσʔλͷฒͼ
    - 3 - 3 - 3 - 3
    ഑ྻ
    *OUFSMFBWFEʢͻͱͭͷόοϑΝʣ
    
    DIͷ৔߹
    

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18. ೾ܗදࣔͷྫ
    %"8ͷ৔߹
    

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19. ఺Ͱදࣔ
    ઢͰදࣔ
    ృΓͭͿ͠
    ˞$VCBTFͷྫ
    

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20. ্Լ͕ࠞࡏ
    Ξ΢τϥΠϯ
    ˞$VCBTFͷྫ
    

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21. ೾ܗදࣔͷྫ
    ϘΠεϝϞͷ৔߹
    

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22. ࠷େݶʹ֦େ
    ࠷େݶʹॖখ
    ॖখ
    ˞ϘΠεϝϞͷྫ
    

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23. ࠷େݶʹ֦େ
    ॖখ
    ը໘ͷ෯ʹରͯ͠
    ॎઢͷ਺͕Ұॹ
    ˞ϘΠεϝϞͷྫ
    

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24. w ೾ܗʹ伱͕ؒ։͍͍ͯΔ
    w σʔλ΍6*͕গͳͯ͘ࡁΉ
    w 3FUJOBͷӨڹΛड͚ͳ͍
    w ৼ෯ͷ্Լͷ෯͕ಉ͡ʢ্ԼͰผʑͷσʔλΛ࣋ͨͳͯ͘ྑ͍ʣ
    

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25. %"8ͷ৔߹
    w ࡉ͔͘ฤूͰ͖ΔͷͰζʔϜͷ෯͕޿͍
    w ζʔϜ཰ʹΑͬͯ೾ܗͷඳըͷ࢓ํΛ෼͚͍ͯΔ
    ϘΠεϝϞͷ৔߹
    w େࡶ೺ͳฤू͔͠Ͱ͖ͳ͍ͷͰζʔϜͷ෯͕ڱ͍
    w ೾ܗͷඳըͷ࢓ํ͸ͭ
    

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26. ೾ܗ༻σʔλ΁ͷม׵
    

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27. ·ͱΊ͍ͨ۠ؒ
    ͜ͷൣғΛϐΫηϧ෯ͰදࣔͰ͖Ε͹ྑ͍ͱ͢Δ
    

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28. ࠷େ஋ͱ࠷খ஋Λऔಘ
    ʢ࠷େ஋ʣ
    ʢ࠷খ஋ʣ
    

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29. ؒҾ͍ͯ͸͍͚ͳ͍
    ৼ෯ͳͷͰ෇ۙ͹͔ΓΛ௫Ή͜ͱ͕͋Δ
    
    

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30. ઈର஋ͷ࠷େ஋Λऔಘ
    ʢઈର஋ͷ࠷େ஋ʣ
    ʢ࠷খ஋ʣ
    

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31. ύϑΥʔϚϯεΛߟྀ͢Δ
    

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32. "DDFMFSBUF'SBNFXPSLΛ࢖͏
    w
    fl
    PBU΍EPVCMFͷ഑ྻʹର͢ΔॲཧΛ଎͘Ͱ͖Δʢ͔΋ʣ
    w ഑ྻͷத͔Β࠷খ஋ɾ࠷େ஋Λ୳͢὎W%41@NJOWW%41@NBYW
    

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33. όοΫάϥ΢ϯυͰॲཧ͢Δ
    ϝΠϯ
    εϨου
    #(
    εϨου
    6*ʹ൓ө
    ը૾࡞੒
    σʔλಡࠐ
    6*ߋ৽
    

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34. όοΫάϥ΢ϯυͰॲཧ͢Δ
    ϝΠϯ
    εϨου
    #(
    εϨου
    6*ʹ൓ө
    ը૾࡞੒
    σʔλಡࠐ
    6*ߋ৽
    "VEJPऔࠐ
    ζʔϜ
    Ωϟογϡ
    

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35. ࠷খݶͷ6*Λදࣔ͢Δ
    ϘΠεϝϞతͳ৔߹
    ը໘
    ࠶ར༻
    

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36. .FUBMΛ࢖͏
    

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37. .FUBMΛ࢖͏΂͖ͱ͖͸ʁ
    w 6*,JUͰ͸ύϑΥʔϚϯε͕ग़ͳ͍ʢը૾ͷඳըʹ͕͔͔࣌ؒΔʣ
    w ઈ͑ؒͳ͘εϜʔζͳΞχϝʔγϣϯΛ͍ͨ͠
    w සൟʹ೾ܗͷߋ৽Λ͢Δ
    

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38. .FUBMͰ೾ܗΛඳը
    w ը૾Λඳը͢ΔͷͰ͸ͳ͘ɺϙϦΰϯͰඳը͢Δ
    w ృΓͭͿ͠͸ࡾ֯ܗΛ૊Έ߹ΘͤΔ
    w ௖఺࠲ඪͷ഑ྻΛ$16ଆͰ࡞ΓɺృΓͭͿ͠͸(16ʹ೚ͤΔ
    w ࣄલʹը૾Λ࡞Δඞཁ͕ͳ͘ͳΔ
    

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39. σʔλྔ͕গͳ͘͢Ή
    ը૾
    ௖఺഑ྻ
    ॎͷσʔλྔ͕
    গͳ͘ͳΔ
    

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40. ࣍ݩը૾ͷඳը͕ճͰ͢Ή
    ೾ܗը૾࡞੒ ը໘දࣔ
    ೾ܗ༻σʔλ
    ࡞੒
    ը໘දࣔ
    ೾ܗ༻σʔλ
    ࡞੒
    ͍Βͳ͘ͳΔ
    

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41. ֊ஈঢ়ʹృΓͭͿ͠
    

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42. ֊ஈঢ়ʹృΓͭͿ͠
    ௖఺Λฒ΂Δ
    

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43. ֊ஈঢ়ʹృΓͭͿ͠
    ࡾ֯ܗΛ૊Έ߹ΘͤͯృΓͭͿ͢
    

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44. ઢܗิؒతʹృΓͭͿ͠
    ҰݟΞφϩάͷ೾ܗʹۙ͘ݟ͑Δ͕
    σδλϧσʔλͷࢹ֮Խͱͯ͠͸ӕ
    Ͱ΋௖఺͸গͳ͘ࡁΉ
    

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45. ྠֲઢ
    ઢͷଠ͞͸ௐ੔Ͱ͖ͳ͍
    

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46. ྠֲઢ
    ࡾ֯ܗΛ૊Έ߹ΘͤΔ
    

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47. όοΫάϥ΢ϯυͰॲཧ͢Δ
    ϝΠϯ
    εϨου
    ඳը
    ඳը
    ඳը
    ඵ ඵ
    

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48. όοΫάϥ΢ϯυͰॲཧ͢Δ
    ϝΠϯ
    εϨου
    #(
    εϨου
    ඳը
    ௖఺഑ྻ࡞੒
    .5-#V
    ff
    FSʹ
    ൓ө
    σʔλಡࠐ
    ඳը ඳը
    

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49. όοΫάϥ΢ϯυͰॲཧ͢Δ
    ϝΠϯ
    εϨου
    #(
    εϨου
    ඳը
    ௖఺഑ྻ࡞੒
    σʔλಡࠐ
    ඳը
    ˞͜͜΋#(ʹͰ͖Δ͔΋ʁ
    .5-#V
    ff
    FSʹ
    ൓ө
    ඳը
    .5-#V
    ff
    FSʹ
    ൓ө
    

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50. ೾ܗΛදࣔ͢Δͱ͜Ζ
    ଞͷ6*
    ը໘
    ͚ͩ͜͜.FUBM7JFXʹͯ͠
    .FUBMͷෛՙΛܰ͘͢Δ
    .FUBM7JFXΛ࠷௿ݶͷྖҬʹ͢Δ
    

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51. ͦͷଞͷ.FUBMͷར఺
    w ζʔϜͯ͠΋ඳը࣌ͷղ૾౓͸Լ͕Βͳ͍
    w ෳ਺ͷ೾ܗϒϩοΫΛ૊Έ߹Θͤͯ΋ܨ͗໨͕͖Ε͍
    w ϑϨʔϜϨʔτΛམͱ͢͜ͱ͕Ͱ͖Δ
    

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52. ·ͱΊ
    

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53. ࿩ͨ͠಺༰
    w ΦʔσΟΦͷσʔλܗࣜʹ͍ͭͯʢϦχΞ1$.ʣ
    w طଘͷΞϓϦͷ೾ܗදࣔʢ$VCBTFɾϘΠεϝϞͷྫʣ
    w ೾ܗ༻σʔλ΁ͷม׵ʢ࠷େ஋ɾ࠷খ஋Λ࢖͏ʣ
    w ύϑΥʔϚϯεͷߟྀʢ"DDFMFSBUF'8ɾ#(ʹ೚ͤΔɺ࠷௿ݶͷ6*ʣ
    w .FUBMΛ࢖ͬͨ೾ܗඳըʢ௖఺഑ྻͰܰ͘͢Δʣ
    

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