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ミラティブとWebRTC - WebRTC framework の中身を覗いてみよう / We...
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naru-jpn
July 29, 2021
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ミラティブとWebRTC - WebRTC framework の中身を覗いてみよう / WebRTC framework AudioUnit Processing
WebRTC framework の中身がわからなくて近付くのが怖かったけど、少しだけわかりあえた話
naru-jpn
July 29, 2021
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Transcript
ϛϥςΟϒͱWebRTC WebRTC framework ͷதΛ͍ͯΈΑ͏ Naruki Chigira @_naru_jpn / Lib arXiv
/ ໌ϫΫνϯ2ճ
WebRTC framework
https://webrtc.org
WebRTC ϛϥςΟϒͷͲ͜ͰΘΕ͍ͯΔͷ͔
ίϥϘ௨ ৴ऀ ࢹௌऀ ࢹௌऀͱձΛ͠ͳ͕Β৴͕Ͱ͖ΔΑ
ίϥϘ৴ ৴ऀ A ৴ऀ B ৴ऀಉ࢜ͰձΛ͠ͳ͕Β৴͕Ͱ͖ΔΑ
NEW! ίϥϘϚονϯά ৴ऀ A ৴ऀ B ಉ͡ήʔϜͰ৴͍ͯ͠Δਓಉ࢜ͰϚονϯά͢ΔʢҰ෦ެ։
։ൃ͢ΔதͰͪΐͬͱࠔͬͨ͜ͱ͕͋ͬͨ
৴ऀ ࢹௌऀ WebRTC ͷଓ࣌ʹΞϓϦ͕όοΫάϥϯυঢ়ଶʹ͋ΔͱɺԻͷೖग़ྗ͕Ͱ͖ͳ͘ͳͬͯ͠·͏ ϛϥςΟϒΞϓϦ όοΫάϥϯυͰ ىಈத
όοΫάϥϯυͰଓػঢ়ଶΛ Ωϟϯηϧ͢ΔͳͲͯ͠ɺ੍ޚͰ͖ͨ
ػೳ্੍ޚͰ͖͍ͯΔ͚Ͳɺ Ͳ͏ͯͦ͠͏ͳ͍ͬͯΔͷ͔ཧղͰ͖͍ͯͳ͍ͷͰ৮Δͷ͕ා͍!
WebRTC framework ͷதΛ͍ͯΈΑ͏!
https://webrtc.googlesource.com/src/
https://webrtc.googlesource.com/src/
https://webrtc.googlesource.com/src/+/refs/heads/main
Իͷ੍ޚΛ͍ͯ͠Δͱ͜ΖΛ͍ͯΈΑ͏!
https://webrtc.googlesource.com/src/+/refs/heads/main/sdk/objc/ This directory contains the Obj-C SDK for WebRTC. This
includes wrappers for the C++ PeerConnection API and some platform speci fi c components for iOS and macOS.
https://webrtc.googlesource.com/src/+/refs/heads/main/sdk/objc/native/src/audio/ .mm ͍ͬͯ͏ͷ Objective-C++ Λද֦͢ுࢠͩΑ
https://webrtc.googlesource.com/src/+/refs/heads/main/sdk/objc/native/src/audio/voice_processing_audio_unit.mm AudioOutputUnitStart ΛݺͿͱԻͷೖग़ྗॲཧ͕͡·ΔΑ voice_processing_audio_unit.mm
https://developer.apple.com/documentation/audiotoolbox/1439763-audiooutputunitstart AudioOutputUnitStart ΛݺͿͱԻͷೖग़ྗॲཧ͕͡·ΔΑ
AudioOutputUnitStart ͷৼΔ͍ΛௐͯΈΑ͏
https://stackover fl ow.com/questions/61312360/auaudiounit-cant-play-audio-in-the-background-error-code-561145187
https://developer.apple.com/documentation/avfaudio/avaudiosession/errorcode/cannotstartrecording
AudioOutputUnitStart ͕όοΫάϥϯυͰࣦഊ͢ ΔͷɺOSͷ༷తʹͦ͏ͳ͍ͬͯΔΒ͍͠!
AudioOutputUnitStart ͕͍ͭݺΕ͍ͯΔͷ͔֬ೝ͓ͯ͜͠͏
https://webrtc.googlesource.com/src/+/refs/heads/main/audio/audio_state.cc WebRTC ͷଓཱ͕֬ͨ͠ޙʹ AddReceivingStream ͕ݺΕɺ StartPlayout ͷதͰ AudioOutputUnitStart ͕ݺΕΔ
ΞϓϦ͕όοΫάϥϯυঢ়ଶͩͱɺԻͷೖग़ྗॲ ཧͷ։࢝ʹࣦഊͯ͠͠·͏͜ͱ͕ཧղͰ͖ͨ!
·ͱΊ όοΫάϥϯυͰԻͷΓͱΓ͕Ͱ͖ͳ͘ͳΔݱ͕ɺί ʔυϨϕϧͰཧղͰ͖ΔΑ͏ʹͳͬͨ ɾݪҼ͕Θ͔ͬͯɺͳͥͳͷ͔Λઆ໌Ͱ͖ΔΑ͏ʹͳͬͨ ɾWebRTC framework ͱগ͚ͩ͠ྑ͘ͳΕͨ
͋Γ͕ͱ͏͍͟͝·ͨ͠! WE ARE HIRING! ੵۃ࠾༻தͩΑ!