4485ffb58d
Any file that uses the RTC_DISALLOW_* macros should #include "webrtc/base/constructormagic.h", but a shocking number of them don't. This causes trouble when we try to wean files off of #including scoped_ptr.h, since a bunch of files get their constructormagic macros only from there. Rather than fixing these errors one by one as they turn up, this CL simply ensures that every file in the WebRTC tree that uses the RTC_DISALLOW_* macros #includes "webrtc/base/constructormagic.h". BUG=webrtc:5520 Review URL: https://codereview.webrtc.org/1917043005 Cr-Commit-Position: refs/heads/master@{#12509}
91 lines
3.4 KiB
C++
91 lines
3.4 KiB
C++
/*
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* Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef WEBRTC_MODULES_DESKTOP_CAPTURE_SCREEN_CAPTURER_HELPER_H_
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#define WEBRTC_MODULES_DESKTOP_CAPTURE_SCREEN_CAPTURER_HELPER_H_
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#include <memory>
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#include "webrtc/base/constructormagic.h"
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#include "webrtc/modules/desktop_capture/desktop_geometry.h"
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#include "webrtc/modules/desktop_capture/desktop_region.h"
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#include "webrtc/system_wrappers/include/rw_lock_wrapper.h"
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namespace webrtc {
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// ScreenCapturerHelper is intended to be used by an implementation of the
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// ScreenCapturer interface. It maintains a thread-safe invalid region, and
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// the size of the most recently captured screen, on behalf of the
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// ScreenCapturer that owns it.
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class ScreenCapturerHelper {
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public:
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ScreenCapturerHelper();
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~ScreenCapturerHelper();
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// Clear out the invalid region.
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void ClearInvalidRegion();
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// Invalidate the specified region.
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void InvalidateRegion(const DesktopRegion& invalid_region);
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// Invalidate the entire screen, of a given size.
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void InvalidateScreen(const DesktopSize& size);
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// Copies current invalid region to |invalid_region| clears invalid region
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// storage for the next frame.
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void TakeInvalidRegion(DesktopRegion* invalid_region);
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// Access the size of the most recently captured screen.
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const DesktopSize& size_most_recent() const;
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void set_size_most_recent(const DesktopSize& size);
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// Lossy compression can result in color values leaking between pixels in one
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// block. If part of a block changes, then unchanged parts of that block can
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// be changed in the compressed output. So we need to re-render an entire
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// block whenever part of the block changes.
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//
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// If |log_grid_size| is >= 1, then this function makes TakeInvalidRegion()
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// produce an invalid region expanded so that its vertices lie on a grid of
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// size 2 ^ |log_grid_size|. The expanded region is then clipped to the size
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// of the most recently captured screen, as previously set by
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// set_size_most_recent().
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// If |log_grid_size| is <= 0, then the invalid region is not expanded.
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void SetLogGridSize(int log_grid_size);
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// Expands a region so that its vertices all lie on a grid.
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// The grid size must be >= 2, so |log_grid_size| must be >= 1.
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static void ExpandToGrid(const DesktopRegion& region,
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int log_grid_size,
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DesktopRegion* result);
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private:
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// A region that has been manually invalidated (through InvalidateRegion).
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// These will be returned as dirty_region in the capture data during the next
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// capture.
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DesktopRegion invalid_region_;
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// A lock protecting |invalid_region_| across threads.
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std::unique_ptr<RWLockWrapper> invalid_region_lock_;
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// The size of the most recently captured screen.
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DesktopSize size_most_recent_;
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// The log (base 2) of the size of the grid to which the invalid region is
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// expanded.
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// If the value is <= 0, then the invalid region is not expanded to a grid.
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int log_grid_size_;
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RTC_DISALLOW_COPY_AND_ASSIGN(ScreenCapturerHelper);
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};
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} // namespace webrtc
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#endif // WEBRTC_MODULES_DESKTOP_CAPTURE_SCREEN_CAPTURER_HELPER_H_
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