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
3.1 KiB
C++
91 lines
3.1 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_DIFFER_H_
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#define WEBRTC_MODULES_DESKTOP_CAPTURE_DIFFER_H_
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#include <memory>
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#include <vector>
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#include "webrtc/base/constructormagic.h"
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#include "webrtc/modules/desktop_capture/desktop_region.h"
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namespace webrtc {
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// TODO(sergeyu): Simplify differ now that we are working with DesktopRegion.
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// diff_info_ should no longer be needed, as we can put our data directly into
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// the region that we are calculating.
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// http://crbug.com/92379
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// TODO(sergeyu): Rename this class to something more sensible, e.g.
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// ScreenCaptureFrameDifferencer.
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class Differ {
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public:
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// Create a differ that operates on bitmaps with the specified width, height
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// and bytes_per_pixel.
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Differ(int width, int height, int bytes_per_pixel, int stride);
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~Differ();
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int width() { return width_; }
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int height() { return height_; }
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int bytes_per_pixel() { return bytes_per_pixel_; }
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int bytes_per_row() { return bytes_per_row_; }
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// Given the previous and current screen buffer, calculate the dirty region
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// that encloses all of the changed pixels in the new screen.
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void CalcDirtyRegion(const uint8_t* prev_buffer, const uint8_t* curr_buffer,
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DesktopRegion* region);
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private:
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// Allow tests to access our private parts.
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friend class DifferTest;
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// Identify all of the blocks that contain changed pixels.
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void MarkDirtyBlocks(const uint8_t* prev_buffer, const uint8_t* curr_buffer);
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// After the dirty blocks have been identified, this routine merges adjacent
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// blocks into a region.
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// The goal is to minimize the region that covers the dirty blocks.
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void MergeBlocks(DesktopRegion* region);
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// Checks whether the upper-left portions of the buffers are equal. The size
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// of the portion to check is specified by the |width| and |height| values.
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// Note that if we force the capturer to always return images whose width and
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// height are multiples of kBlockSize, then this will never be called.
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bool PartialBlocksEqual(const uint8_t* prev_buffer,
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const uint8_t* curr_buffer,
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int stride,
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int width, int height);
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// Dimensions of screen.
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int width_;
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int height_;
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// Number of bytes for each pixel in source and dest bitmap.
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// (Yes, they must match.)
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int bytes_per_pixel_;
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// Number of bytes in each row of the image (AKA: stride).
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int bytes_per_row_;
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// Diff information for each block in the image.
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std::unique_ptr<bool[]> diff_info_;
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// Dimensions and total size of diff info array.
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int diff_info_width_;
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int diff_info_height_;
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int diff_info_size_;
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RTC_DISALLOW_COPY_AND_ASSIGN(Differ);
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};
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} // namespace webrtc
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#endif // WEBRTC_MODULES_DESKTOP_CAPTURE_DIFFER_H_
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