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- Add SystemAudioCapturer class using ScreenCaptureKit (macOS 13.0+) - Add SystemAudioMixer to mix system audio with microphone audio - Integrate system audio capture into getDisplayMedia when audio: true - Uses ring buffer for efficient audio sample handling - Supports volume control for system and microphone audio Usage: Pass audio: true in getDisplayMedia constraints to capture system audio and mix it into the microphone audio stream.
System audio is now captured and mixed by default when using getDisplayMedia on macOS. To disable, explicitly pass audio: false in constraints.
AudioBufferList has a variable-length array that only has space for 1 buffer when declared on the stack. ScreenCaptureKit provides stereo audio which needs 2 buffers, causing error -12737 (kCMSampleBufferError_ArrayTooSmall). Fix: Dynamically allocate AudioBufferList with space for 2 buffers.
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