VP9 screenshare: use CONSTRAINED_FROM_ABOVE_DROP mode

This mode was added by libvpx team specificaly for this usecase: if a
layer is dropped, all lower layers have to be dropped also.

This ensures that higher layers always have higher framerate than the
lower layers and stream is RTP compatible.

This CL also renames full_superframe_drop_ to !layer_buffering, as it
closer reflects the purpose of that flag (in screenshare mode, no
buffering is needed, because the highest layer is always present in the
superframe, yet, it's not a full-superframe dropping mode).

Bug: webrtc:10257
Change-Id: I2589bfd2b9b63de0e410f277a716276234993843
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/151764
Reviewed-by: Sergey Silkin <ssilkin@webrtc.org>
Commit-Queue: Ilya Nikolaevskiy <ilnik@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#29155}
2 files changed
tree: a42eea45db4b1c2c6b859e76f2ad6d7a6f68569f
  1. .clang-format
  2. .git-blame-ignore-revs
  3. .gitignore
  4. .gn
  5. .vpython
  7. BUILD.gn
  9. DEPS
  12. OWNERS
  14. PRESUBMIT.py
  15. README.chromium
  16. README.md
  18. abseil-in-webrtc.md
  19. api/
  20. audio/
  21. build_overrides/
  22. call/
  23. codereview.settings
  24. common_audio/
  25. common_types.h
  26. common_video/
  27. data/
  28. docs/
  29. examples/
  30. license_template.txt
  31. logging/
  32. media/
  33. modules/
  34. native-api.md
  35. p2p/
  36. pc/
  37. presubmit_test.py
  38. presubmit_test_mocks.py
  39. pylintrc
  40. resources/
  41. rtc_base/
  42. rtc_tools/
  43. sdk/
  44. stats/
  45. style-guide.md
  46. style-guide/
  47. system_wrappers/
  48. test/
  49. tools_webrtc/
  50. video/
  51. webrtc.gni
  52. whitespace.txt

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.


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

Authoritative list of directories that contain the native API header files.

More info