Add support for I444 in VideoFrameBuffer

VideoFrameBuffer is currently hard coded to be either I420 or Native.
This CL makes VideoFrameBuffer more generic by moving the I420 specific
functions into their own class, and adds an enum tag that represents the
format and storage type of the buffer. Each buffer type is then
represented as a subclass. See webrtc/api/video/video_frame_buffer.h for
more info.

This CL also adds support for representing I444 in VideoFrameBuffer
using the new interface. Possible future buffer type candidates are
RGB and NV12.

BUG=webrtc:7632
TBR=stefan@webrtc.org

Review-Url: https://codereview.webrtc.org/2847383002
Cr-Commit-Position: refs/heads/master@{#18098}
7 files changed
tree: 12302ddd0bc579ad7b915e1d98f31e574085cf8a
  1. build_overrides/
  2. data/
  3. infra/
  4. resources/
  5. tools_webrtc/
  6. webrtc/
  7. .clang-format
  8. .git-blame-ignore-revs
  9. .gitignore
  10. .gn
  11. AUTHORS
  12. BUILD.gn
  13. check_root_dir.py
  14. cleanup_links.py
  15. codereview.settings
  16. DEPS
  17. LICENSE
  18. license_template.txt
  19. LICENSE_THIRD_PARTY
  20. OWNERS
  21. PATENTS
  22. PRESUBMIT.py
  23. pylintrc
  24. README.md
  25. WATCHLISTS
README.md

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.

Development

See http://www.webrtc.org/native-code/development for instructions on how to get started developing with the native code.

More info