5a8724564c
This CL makes scaling and cropping lazy in AVFoundationVideoCapturer and provides optimized paths for SW and HW encoding. For SW encoding, an efficient NV12 -> I420 cropping and scaling is implemented in CoreVideoFrameBuffer::NativeToI420. For HW encoding, an efficient NV12 -> NV12 cropping and scaling is implemented in CoreVideoFrameBuffer::CropAndScaleTo. The performance improvement over the existing cropping and scaling is that it is now done in one step instead of making an intermediary copy of the Y plane. There might still be room for improvement in the HW path using some HW support. That will be explored in a future CL. BUG=b/30939444 Review-Url: https://codereview.webrtc.org/2394483005 Cr-Commit-Position: refs/heads/master@{#14701}
WebRTC is a free, open software project that provides browsers and mobile applications with Real-Time Communications (RTC) capabilities via simple APIs. The WebRTC components have been optimized to best serve this purpose.
Our mission: To enable rich, high-quality RTC applications to be developed for the browser, mobile platforms, and IoT devices, and allow them all to communicate via a common set of protocols.
The WebRTC initiative is a project supported by Google, Mozilla and Opera, amongst others. This page is maintained by the Google Chrome team.
Development
See http://www.webrtc.org/native-code/development for instructions on how to get started developing with the native code.
More info
- Official web site: http://www.webrtc.org
- Master source code repo: https://chromium.googlesource.com/external/webrtc
- Samples and reference apps: https://github.com/webrtc
- Mailing list: http://groups.google.com/group/discuss-webrtc
- Continuous build: http://build.chromium.org/p/client.webrtc