simulcast の判定を type: offer の simulcast の値で判定するように修正する

[zztkm]

変更内容

• [ADD] SignalingOffer に simulcast を追加する
• [FIX] WrapperVideoEncoderFactory.shared.simulcastEnabled の値を type: offer の際に設定される simulcast の値で上書きする
  • 認証ウェブフック成功時に払い出された simulcast の値を利用する

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This pull request primarily focuses on adding support for simulcast in the SignalingOffer structure and handling it in the PeerChannel class. The changes include adding simulcast to SignalingOffer, decoding it in the Codable extension, and updating WrapperVideoEncoderFactory.shared.simulcastEnabled based on the simulcast value in PeerChannel. The CHANGES.md file is also updated to reflect these changes.

Here are the key changes:

• Sora/Signaling.swift:

  • Added a new optional property simulcast of type Bool? to SignalingOffer structure, which indicates whether simulcast is enabled or not.
  • In the Codable extension of SignalingOffer, added decoding for simulcast from the container. [1] [2]

• Sora/PeerChannel.swift:

  • In the PeerChannel class, added a check for offer.simulcast. If it's not nil, WrapperVideoEncoderFactory.shared.simulcastEnabled is updated with its value.

• CHANGES.md:

  • Added entries about the addition of simulcast to SignalingOffer and the update of WrapperVideoEncoderFactory.shared.simulcastEnabled based on simulcast value.