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Unified Diff: remoting/host/video_frame_capturer.h

Issue 11470028: Move screen capturers to remoting/capturer. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Created 8 years ago
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Index: remoting/host/video_frame_capturer.h
diff --git a/remoting/host/video_frame_capturer.h b/remoting/host/video_frame_capturer.h
deleted file mode 100644
index ba8a5c7e5aec9d0a0ee9d1b54156d731b1afe761..0000000000000000000000000000000000000000
--- a/remoting/host/video_frame_capturer.h
+++ /dev/null
@@ -1,123 +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_VIDEO_FRAME_CAPTURER_H_
-#define REMOTING_HOST_VIDEO_FRAME_CAPTURER_H_
-
-#include "base/basictypes.h"
-#include "base/callback.h"
-#include "base/shared_memory.h"
-#include "media/base/video_frame.h"
-#include "third_party/skia/include/core/SkRegion.h"
-
-namespace remoting {
-
-namespace protocol {
-class CursorShapeInfo;
-}
-
-class CaptureData;
-class SharedBufferFactory;
-
-// Class used to capture video frames asynchronously.
-//
-// The full capture sequence 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) InvalidateRegion
-// 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) CaptureFrame
-// 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 VideoFrameCapturer {
- public:
- // Provides callbacks used by the capturer to pass captured video frames and
- // mouse cursor shapes to the processing pipeline.
- class Delegate {
- public:
- virtual ~Delegate() {}
-
- // Called when a video frame has been captured. |capture_data| describes
- // a captured frame.
- virtual void OnCaptureCompleted(
- scoped_refptr<CaptureData> capture_data) = 0;
-
- // Called when the cursor shape has changed.
- virtual void OnCursorShapeChanged(
- scoped_ptr<protocol::CursorShapeInfo> cursor_shape) = 0;
- };
-
- virtual ~VideoFrameCapturer() {}
-
- // Create platform-specific capturer.
- static scoped_ptr<VideoFrameCapturer> Create();
-
- // Create platform-specific capturer that uses shared memory buffers.
- static scoped_ptr<VideoFrameCapturer> CreateWithFactory(
- SharedBufferFactory* shared_buffer_factory);
-
-#if defined(OS_LINUX)
- // Set whether the VideoFrameCapturer should try to use X DAMAGE support if it
- // is available. This needs to be called before the VideoFrameCapturer 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
- // VideoFrameCapturer::Create(). This is a temporary solution, until the
- // DesktopEnvironment class is refactored to allow applications to control
- // the creation of various stubs (including the VideoFrameCapturer) - see
- // http://crbug.com/104544
- static void EnableXDamage(bool enable);
-#endif // defined(OS_LINUX)
-
- // Called at the beginning of a capturing session. |delegate| must remain
- // valid until Stop() is called.
- virtual void Start(Delegate* delegate) = 0;
-
- // Called at the end of a capturing session.
- virtual void Stop() = 0;
-
- // Returns the pixel format of the screen.
- virtual media::VideoFrame::Format pixel_format() const = 0;
-
- // Invalidates the specified region.
- virtual void InvalidateRegion(const SkRegion& invalid_region) = 0;
-
- // Captures the screen data associated with each of the accumulated
- // dirty region. When the capture is complete, the delegate is notified 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 CaptureFrame() = 0;
-
- // Get the size of the most recently captured screen.
- virtual const SkISize& size_most_recent() const = 0;
-};
-
-} // namespace remoting
-
-#endif // REMOTING_HOST_VIDEO_FRAME_CAPTURER_H_

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