Enabled the plugin and cleaned up all issues it found, mainly virtual
destructors not being marked as override.
BUG=webrtc:163
Review-Url: https://codereview.webrtc.org/2436503004
Cr-Commit-Position: refs/heads/master@{#14793}
1. It looks like ComPtr cannot work well with vector::emplace_back, I got a
consistent crash on one of my machine, but not the other. Move constructor
should have no impact to lvalue reference, but I may be wrong here. The
impact here is ComPtr released before it should be. So a simple solution is to
use copy instead of reference. The D3dDevice is a collection of reference
counted pointers (Microsoft::WRL::ComPtr), there is almost no extra cost.
2. Actively set several fields in D3D11_TEXTURE2D_DESC to avoid potential break
if there are some platform changes later.
3. AcquireNextFrame returns both a DXGI_OUTDUPL_FRAME_INFO with
AccumulatedFrames and an IDXGIResource. But there is no comment in MSDN to
ensure IDXGIResource won't be nullptr if AccumulatedFrames > 0. Adding an extra
check in DxgiOutputDuplicator makes it a safer.
BUG=314516
Review-Url: https://codereview.webrtc.org/2345163002
Cr-Commit-Position: refs/heads/master@{#14341}
Current DirectX capturer cannot capture multiple video cards or monitors. But
according to DXGI desktop duplication sample (https://goo.gl/An0L9l), we can
capture multiple video cards and monitors by duplicating them one by one. So
instead of one IDXGIOutputDuplication instance, this change creates an
IDXGIOutputDuplication instance for each monitor, and merge the output into
one DesktopFrame.
Several other changes are also included,
1. Add supports to DXGI_OUTDUPL_DESC.DesktopImageInSystemMemory. When this flag
is true, we won't copy its content to staging buffer.
2. Capture one monitor instead of entire screen.
Above changes make the logic complex. But with some refactor work, the logic is
not disordered. Please refer to the doc @ https://goo.gl/hU1ifG.
BUG=314516
Review-Url: https://codereview.webrtc.org/2099123002
Cr-Commit-Position: refs/heads/master@{#13684}
