Allow encoders to fall back dynamically to software.

Like video_decoder.cc, a call to Encode that returns
WEBRTC_VIDEO_CODEC_FALLBACK_SOFTWARE will trigger an attempted fallback
to a built-in software encoder. Initialization information, along with
any rate and channel parameter info, will be replayed on the software
encoder and then the frame (that cause the fallback) will be immediately
replayed for the software encoder.

Also modified the existing behavior to Release() the "real" encoder even
if a fallback encoder exists. That seems like the correct behavior.

BUG=webrtc:2920

Review URL: https://codereview.webrtc.org/1328863002

Cr-Commit-Position: refs/heads/master@{#10368}
3 files changed
tree: 55625e98391adc29d6e3eee2e2538281d1c03b80
  1. build_overrides/
  2. chromium/
  3. data/
  4. infra/
  5. resources/
  6. talk/
  7. third_party/
  8. tools/
  9. webrtc/
  10. .clang-format
  11. .gitignore
  12. .gn
  13. all.gyp
  14. AUTHORS
  15. BUILD.gn
  16. check_root_dir.py
  17. codereview.settings
  18. COPYING
  19. DEPS
  20. LICENSE
  21. license_template.txt
  22. LICENSE_THIRD_PARTY
  23. OWNERS
  24. PATENTS
  25. PRESUBMIT.py
  26. pylintrc
  27. README.md
  28. setup_links.py
  29. sync_chromium.py
  30. 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. 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