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Recap multi-camera API from Android Dev Summit 2018 Chanoma, inc. Tomoaki Imai

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https://chomp.app/ Located in Bay Area since 2016 Author of Android アプリ設計パターン⼊入⾨門

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https://youtu.be/u38wOv2a_dA

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What’s new in Android P? • Physical cameras are exposed to third-party app developers Pre-Pie Pie and beyond

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What’s new? • Open multiple physical cameras in one session ‣ Developers can retrieve and replace two camera streams simultaneously

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What’s new? • Open multiple physical camera in one session Camera1 Camera2 Pre-Pie

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What’s new? • Open multiple physical camera in one session PhysicalCamera0 PhysicalCamera1 Pie and beyond

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What’s new? • Open multiple physical camera in one session PhysicalCamera0 PhysicalCamera1

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What’s new? • Open multiple physical camera in one session PhysicalCamera0 PhysicalCamera1

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What’s new? • Open multiple physical camera in one session PhysicalCamera0 PhysicalCamera1

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What can we do with this? • Usage ‣ Calculate depth map using 2 cameras ‣ Zoom using 2 cameras depending on focal length

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Restriction • Physical cameras should be in the same logical group

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Restriction • Physical cameras should be in the same logical group

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Restriction • Physical cameras should be in the same logical group Pixel3 [0] : BACK_CAMERA [1] : LOGICAL_CAMERA(FRONT) [2] : PHYSCIAL_CAMERA_1 [3] : PHYSCIAL_CAMERA_2

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Restriction

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Restriction • Very few supported device as of Dec, 2018 ‣ Pixel 3 ‣ Huawei Mate 20 Series

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How does the process change? setup camera ID start Preview open Camera

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How does the process change? setup camera ID start Preview open Camera

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How does the process change? setup camera ID start Preview start Camera

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How does the process change? setup camera ID start Preview open Camera

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Demo https://github.com/tomoima525/ MultiCameraSample

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Future of Camera on Android • More devices to support multi-camera API https://source.android.com/compatibility/android-cdd#7_5_4_camera_api_behavior

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Future of Camera on Android • Less fragmentation ‣ Project Treble https://android-developers.googleblog.com/2018/11/an-update-on-project- treble.html Understand the impact of Generic System Images (GSI) (Android Dev Summit '18) https://youtu.be/Y-HmCIHD63w

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Future of Camera on Android • Less frustration? ‣ Might become a part of Jetpack?? https://youtu.be/FV3iN4PIB5U?t=2757 (46:00)

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What should we catch up? • Understand the basic functionality of Camera ‣ WTF focus? ‣ WTF Aperture? ‣ WTF white balance?

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What should we catch up? • Understand the basic functionality of Camera https://youtu.be/QEVm5MMBluk

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What should we catch up? • Learn Camera2 Framework ‣ WTF CameraCaptureSession?? ‣ WTF CameraCharacteristics? ‣ WTF with Camera2 API?

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What should we catch up? • Learn Camera2 Framework https://youtu.be/WU1tzOIpmFw https://speakerdeck.com/tomoima525/camera2-api-and-beyond

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Wrap up • multi-camera support allows us to control multiple stream simpler • Not many devices are supported as of December 2018