Abstract and overhaul V4L2 HW encode classes.

The main goal of this CL is to abstract ExynosVideoEncodeAccelerator class into
a generic V4L2VideoEncodeAccelerator and extract the Exynos-specific image
processor (GSC) from it to a separate V4L2ImageProcessor class, and use it only
if the platform requires it.

Some remaining format hardcoding has to be addressed after adding proper device
capability enumeration.

- Add V4L2ImageProcessor class for interacting with hardware blocks that allow
  image format conversion and/or scaling via the V4L2 API.
- Extract image conversion from ExynosVideoEncodeAccelerator.
- Turn ExynosVideoEncodeAccelerator into a generic V4L2VideoEncodeAccelerator
  that can optionally use a V4L2ImageProcessor for color conversion if the
  requested input format is not supported by the HW codec directly.
- Extend V4L2Device to understand different types of devices and add
  format utility functions.
- Don't require EGLContext to create a V4L2Device.
- Make V4L2VideoEncodeAccelerator use V4L2Device.
- Add NV12 format to VideoFrame (but don't allow AllocateYUV() for it for now).
- Add an ability to wrap dmabufs in VideoFrame.
- Update veatest to use V4L2Device and vdatest for new changes.

BUG=345179
TEST=veatest, webrtc loopback

Review URL: https://codereview.chromium.org/236953003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@268385 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 1 insertions, 0 deletions

diff --git a/cc/resources/video_resource_updater.cc b/cc/resources/video_resource_updater.cc
index 75a2adb..f971ae8 100644
--- a/cc/resources/video_resource_updater.cc
+++ b/cc/resources/video_resource_updater.cc
@@ -73,6 +73,7 @@ bool VideoResourceUpdater::VerifyFrame(
 
     // Unacceptable inputs. ¯\(°_o)/¯
     case media::VideoFrame::UNKNOWN:
+    case media::VideoFrame::NV12:
       break;
   }
   return false;