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

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1. ϛϥςΟϒͱWebRTC WebRTC framework ͷத਎Λ೷͍ͯΈΑ͏ Naruki Chigira @_naru_jpn / Lib arXiv / ໌೔ϫΫνϯ2ճ໨
2. WebRTC framework
3. https://webrtc.org
4. WebRTC ͸ϛϥςΟϒͷͲ͜Ͱ࢖ΘΕ͍ͯΔͷ͔
5. ίϥϘ௨࿩ ഑৴ऀ ࢹௌऀ ࢹௌऀͱձ࿩Λ͠ͳ͕Β഑৴͕Ͱ͖ΔΑ
6. ίϥϘ഑৴ ഑৴ऀ A ഑৴ऀ B ഑৴ऀಉ࢜Ͱձ࿩Λ͠ͳ͕Β഑৴͕Ͱ͖ΔΑ
7. NEW! ίϥϘϚονϯά ഑৴ऀ A ഑৴ऀ B ಉ͡ήʔϜͰ഑৴͍ͯ͠Δਓಉ࢜ͰϚονϯά͢ΔʢҰ෦ެ։
8. ։ൃ͢ΔதͰͪΐͬͱࠔͬͨ͜ͱ͕͋ͬͨ
9. ഑৴ऀ ࢹௌऀ WebRTC ͷ઀ଓ࣌ʹΞϓϦ͕όοΫάϥ΢ϯυঢ়ଶʹ͋ΔͱɺԻ੠ͷೖग़ྗ͕Ͱ͖ͳ͘ͳͬͯ͠·͏ ϛϥςΟϒΞϓϦ͸ όοΫάϥ΢ϯυͰ ىಈத
10. όοΫάϥ΢ϯυͰ઀ଓ଴ػঢ়ଶΛ Ωϟϯηϧ͢ΔͳͲͯ͠ɺ੍ޚ͸Ͱ͖ͨ
11. ػೳ্͸੍ޚͰ͖͍ͯΔ͚Ͳɺ Ͳ͏ͯͦ͠͏ͳ͍ͬͯΔͷ͔ཧղͰ͖͍ͯͳ͍ͷͰ৮Δͷ͕ා͍!
12. WebRTC framework ͷத਎Λ೷͍ͯΈΑ͏!
13. https://webrtc.googlesource.com/src/
14. https://webrtc.googlesource.com/src/
15. https://webrtc.googlesource.com/src/+/refs/heads/main
16. Ի੠ͷ੍ޚΛ͍ͯ͠Δͱ͜ΖΛ೷͍ͯΈΑ͏!
17. 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.
18. https://webrtc.googlesource.com/src/+/refs/heads/main/sdk/objc/native/src/audio/ .mm ͍ͬͯ͏ͷ͸ Objective-C++ Λද֦͢ுࢠͩΑ
19. https://webrtc.googlesource.com/src/+/refs/heads/main/sdk/objc/native/src/audio/voice_processing_audio_unit.mm AudioOutputUnitStart ΛݺͿͱԻ੠ͷೖग़ྗॲཧ͕͸͡·ΔΑ voice_processing_audio_unit.mm
20. https://developer.apple.com/documentation/audiotoolbox/1439763-audiooutputunitstart AudioOutputUnitStart ΛݺͿͱԻ੠ͷೖग़ྗॲཧ͕͸͡·ΔΑ
21. AudioOutputUnitStart ͷৼΔ෣͍Λௐ΂ͯΈΑ͏
22. https://stackover fl ow.com/questions/61312360/auaudiounit-cant-play-audio-in-the-background-error-code-561145187
23. https://developer.apple.com/documentation/avfaudio/avaudiosession/errorcode/cannotstartrecording
24. AudioOutputUnitStart ͕όοΫάϥ΢ϯυͰࣦഊ͢ Δͷ͸ɺOSͷ࢓༷తʹ΋ͦ͏ͳ͍ͬͯΔΒ͍͠!
25. AudioOutputUnitStart ͕͍ͭݺ͹Ε͍ͯΔͷ͔΋֬ೝ͓ͯ͜͠͏
26. https://webrtc.googlesource.com/src/+/refs/heads/main/audio/audio_state.cc WebRTC ͷ઀ଓཱ͕֬ͨ͠ޙʹ AddReceivingStream ͕ݺ͹Εɺ
 StartPlayout ͷதͰ AudioOutputUnitStart ͕ݺ͹ΕΔ
27. ΞϓϦ͕όοΫάϥ΢ϯυঢ়ଶͩͱɺԻ੠ͷೖग़ྗॲ ཧͷ։࢝ʹࣦഊͯ͠͠·͏͜ͱ͕ཧղͰ͖ͨ!
28. ·ͱΊ όοΫάϥ΢ϯυͰԻ੠ͷ΍ΓͱΓ͕Ͱ͖ͳ͘ͳΔݱ৅͕ɺί ʔυϨϕϧͰཧղͰ͖ΔΑ͏ʹͳͬͨ ɾݪҼ͕Θ͔ͬͯɺͳͥͳͷ͔Λઆ໌Ͱ͖ΔΑ͏ʹͳͬͨ ɾWebRTC framework ͱগ͚ͩ͠஥ྑ͘ͳΕͨ
29. ͋Γ͕ͱ͏͍͟͝·ͨ͠! WE ARE HIRING! ੵۃ࠾༻தͩΑ!