ミラティブとWebRTC - WebRTC framework の中身を覗いてみよう / WebRTC framework AudioUnit Processing

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ϛϥςΟϒͱWebRTC WebRTC framework ͷத਎Λ೷͍ͯΈΑ͏ Naruki Chigira @_naru_jpn / Lib arXiv / ໌೔ϫΫνϯ2ճ໨

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WebRTC framework

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https://webrtc.org

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WebRTC ͸ϛϥςΟϒͷͲ͜Ͱ࢖ΘΕ͍ͯΔͷ͔

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ίϥϘ௨࿩ ഑৴ऀ ࢹௌऀ ࢹௌऀͱձ࿩Λ͠ͳ͕Β഑৴͕Ͱ͖ΔΑ

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ίϥϘ഑৴ ഑৴ऀ A ഑৴ऀ B ഑৴ऀಉ࢜Ͱձ࿩Λ͠ͳ͕Β഑৴͕Ͱ͖ΔΑ

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NEW! ίϥϘϚονϯά ഑৴ऀ A ഑৴ऀ B ಉ͡ήʔϜͰ഑৴͍ͯ͠Δਓಉ࢜ͰϚονϯά͢ΔʢҰ෦ެ։

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։ൃ͢ΔதͰͪΐͬͱࠔͬͨ͜ͱ͕͋ͬͨ

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഑৴ऀ ࢹௌऀ WebRTC ͷ઀ଓ࣌ʹΞϓϦ͕όοΫάϥ΢ϯυঢ়ଶʹ͋ΔͱɺԻ੠ͷೖग़ྗ͕Ͱ͖ͳ͘ͳͬͯ͠·͏ ϛϥςΟϒΞϓϦ͸ όοΫάϥ΢ϯυͰ ىಈத

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όοΫάϥ΢ϯυͰ઀ଓ଴ػঢ়ଶΛ Ωϟϯηϧ͢ΔͳͲͯ͠ɺ੍ޚ͸Ͱ͖ͨ

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ػೳ্͸੍ޚͰ͖͍ͯΔ͚Ͳɺ Ͳ͏ͯͦ͠͏ͳ͍ͬͯΔͷ͔ཧղͰ͖͍ͯͳ͍ͷͰ৮Δͷ͕ා͍!

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WebRTC framework ͷத਎Λ೷͍ͯΈΑ͏!

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https://webrtc.googlesource.com/src/

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https://webrtc.googlesource.com/src/

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https://webrtc.googlesource.com/src/+/refs/heads/main

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Ի੠ͷ੍ޚΛ͍ͯ͠Δͱ͜ΖΛ೷͍ͯΈΑ͏!

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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.

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https://webrtc.googlesource.com/src/+/refs/heads/main/sdk/objc/native/src/audio/ .mm ͍ͬͯ͏ͷ͸ Objective-C++ Λද֦͢ுࢠͩΑ

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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

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https://developer.apple.com/documentation/audiotoolbox/1439763-audiooutputunitstart AudioOutputUnitStart ΛݺͿͱԻ੠ͷೖग़ྗॲཧ͕͸͡·ΔΑ

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AudioOutputUnitStart ͷৼΔ෣͍Λௐ΂ͯΈΑ͏

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https://stackover fl ow.com/questions/61312360/auaudiounit-cant-play-audio-in-the-background-error-code-561145187

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https://developer.apple.com/documentation/avfaudio/avaudiosession/errorcode/cannotstartrecording

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AudioOutputUnitStart ͕όοΫάϥ΢ϯυͰࣦഊ͢ Δͷ͸ɺOSͷ࢓༷తʹ΋ͦ͏ͳ͍ͬͯΔΒ͍͠!

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AudioOutputUnitStart ͕͍ͭݺ͹Ε͍ͯΔͷ͔΋֬ೝ͓ͯ͜͠͏

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https://webrtc.googlesource.com/src/+/refs/heads/main/audio/audio_state.cc WebRTC ͷ઀ଓཱ͕֬ͨ͠ޙʹ AddReceivingStream ͕ݺ͹Εɺ  StartPlayout ͷதͰ AudioOutputUnitStart ͕ݺ͹ΕΔ

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ΞϓϦ͕όοΫάϥ΢ϯυঢ়ଶͩͱɺԻ੠ͷೖग़ྗॲ ཧͷ։࢝ʹࣦഊͯ͠͠·͏͜ͱ͕ཧղͰ͖ͨ!

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·ͱΊ όοΫάϥ΢ϯυͰԻ੠ͷ΍ΓͱΓ͕Ͱ͖ͳ͘ͳΔݱ৅͕ɺί ʔυϨϕϧͰཧղͰ͖ΔΑ͏ʹͳͬͨ ɾݪҼ͕Θ͔ͬͯɺͳͥͳͷ͔Λઆ໌Ͱ͖ΔΑ͏ʹͳͬͨ ɾWebRTC framework ͱগ͚ͩ͠஥ྑ͘ͳΕͨ

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͋Γ͕ͱ͏͍͟͝·ͨ͠! WE ARE HIRING! ੵۃ࠾༻தͩΑ!