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Unified Diff: remoting/host/capturer.h

Issue 10790075: Rename Capturer to VideoFrameCapturer. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: rebased. Created 8 years, 5 months ago
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Index: remoting/host/capturer.h
diff --git a/remoting/host/capturer.h b/remoting/host/capturer.h
deleted file mode 100644
index 311aee13383ebc3cc13e001bbfbf4f47bc65a127..0000000000000000000000000000000000000000
--- a/remoting/host/capturer.h
+++ /dev/null
@@ -1,125 +0,0 @@
-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef REMOTING_HOST_CAPTURER_H_
-#define REMOTING_HOST_CAPTURER_H_
-
-#include "base/basictypes.h"
-#include "base/callback.h"
-#include "media/base/video_frame.h"
-#include "third_party/skia/include/core/SkRegion.h"
-
-namespace remoting {
-
-namespace protocol {
-class CursorShapeInfo;
-}
-
-class CaptureData;
-
-// A class to perform the task of capturing the image of a window.
-// The capture action is asynchronous to allow maximum throughput.
-//
-// The full capture process is as follows:
-//
-// (1) Start
-// This is when pre-capture steps are executed, such as flagging the
-// display to prevent it from sleeping during a session.
-//
-// (2) InvalidateRects
-// This is an optional step where regions of the screen are marked as
-// invalid. Some platforms (Windows, for now) won't use this and will
-// instead calculate the diff-regions later (in step (2). Other
-// platforms (Mac) will use this to mark all the changed regions of the
-// screen. Some limited rect-merging (e.g., to eliminate exact
-// duplicates) may be done here.
-//
-// (3) CaptureInvalidRects
-// This is where the bits for the invalid rects are packaged up and sent
-// to the encoder.
-// A screen capture is performed if needed. For example, Windows requires
-// a capture to calculate the diff from the previous screen, whereas the
-// Mac version does not.
-//
-// (4) Stop
-// This is when post-capture steps are executed, such as releasing the
-// assertion that prevents the display from sleeping.
-//
-// Implementation has to ensure the following guarantees:
-// 1. Double buffering
-// Since data can be read while another capture action is happening.
-class Capturer {
- public:
- // CaptureCompletedCallback is called when the capturer has completed.
- typedef base::Callback<void(scoped_refptr<CaptureData>)>
- CaptureCompletedCallback;
-
- // CursorShapeChangedCallback is called when the cursor shape has changed.
- typedef base::Callback<void(scoped_ptr<protocol::CursorShapeInfo>)>
- CursorShapeChangedCallback;
-
- virtual ~Capturer() {}
-
- // Create platform-specific capturer.
- static Capturer* Create();
-
-#if defined(OS_LINUX)
- // Set whether the Capturer should try to use X DAMAGE support if it is
- // available. This needs to be called before the Capturer is created.
- // This is used by the Virtual Me2Me host, since the XDamage extension is
- // known to work reliably in this case.
-
- // TODO(lambroslambrou): This currently sets a global flag, referenced during
- // Capturer::Create(). This is a temporary solution, until the
- // DesktopEnvironment class is refactored to allow applications to control
- // the creation of various stubs (including the Capturer) - see
- // http://crbug.com/104544
- static void EnableXDamage(bool enable);
-#endif // defined(OS_LINUX)
-
- // Called at the beginning of a capturing session.
- virtual void Start(
- const CursorShapeChangedCallback& callback) = 0;
-
- // Called at the end of a capturing session.
- virtual void Stop() = 0;
-
- // Called when the screen configuration is changed.
- virtual void ScreenConfigurationChanged() = 0;
-
- // Return the pixel format of the screen.
- virtual media::VideoFrame::Format pixel_format() const = 0;
-
- // Clear out the invalid region.
- virtual void ClearInvalidRegion() = 0;
-
- // Invalidate the specified region.
- virtual void InvalidateRegion(const SkRegion& invalid_region) = 0;
-
- // Invalidate the entire screen, of a given size.
- virtual void InvalidateScreen(const SkISize& size) = 0;
-
- // Invalidate the entire screen, using the size of the most recently
- // captured screen.
- virtual void InvalidateFullScreen() = 0;
-
- // Capture the screen data associated with each of the accumulated
- // dirty region.
- // When the capture is complete, |callback| is called even if the dirty region
- // is empty.
- //
- // It is OK to call this method while another thread is reading
- // data of the previous capture.
- // There can be at most one concurrent read going on when this
- // method is called.
- virtual void CaptureInvalidRegion(
- const CaptureCompletedCallback& callback) = 0;
-
- // Get the size of the most recently captured screen.
- virtual const SkISize& size_most_recent() const = 0;
-};
-
-} // namespace remoting
-
-#endif // REMOTING_HOST_CAPTURER_H_
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