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}
Name: WebRTC URL: http://www.webrtc.org Version: 90 License: BSD License File: LICENSE Description: WebRTC provides real time voice and video processing functionality to enable the implementation of PeerConnection/MediaStream. Third party code used in this project is described in the file LICENSE_THIRD_PARTY.