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Side by Side Diff: cc/layers/video_frame_provider.h

Issue 12596015: cc: Keep a reference on the media::VideoFrame. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Created 7 years, 9 months ago
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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef CC_LAYERS_VIDEO_FRAME_PROVIDER_H_ 5 #ifndef CC_LAYERS_VIDEO_FRAME_PROVIDER_H_
6 #define CC_LAYERS_VIDEO_FRAME_PROVIDER_H_ 6 #define CC_LAYERS_VIDEO_FRAME_PROVIDER_H_
7 7
8 #include "base/memory/ref_counted.h" 8 #include "base/memory/ref_counted.h"
9 9
10 namespace media { 10 namespace media {
11 class VideoFrame; 11 class VideoFrame;
12 } 12 }
13 13
14 namespace cc { 14 namespace cc {
15 15
16 // Threading notes: This class may be used in a multi threaded manner. 16 // Threading notes: This class may be used in a multi threaded manner.
17 // Specifically, the implementation may call getCurrentFrame() or 17 // Specifically, the implementation may call GetCurrentFrame() or
18 // putCurrentFrame() from the compositor thread. If so, the caller is 18 // PutCurrentFrame() from the compositor thread. If so, the caller is
19 // responsible for making sure Client::didReceiveFrame and 19 // responsible for making sure Client::DidReceiveFrame() and
20 // Client::didUpdateMatrix are only called from this same thread. 20 // Client::DidUpdateMatrix() are only called from this same thread.
21 class VideoFrameProvider { 21 class VideoFrameProvider {
22 public: 22 public:
23 virtual ~VideoFrameProvider() {} 23 virtual ~VideoFrameProvider() {}
24 24
25 class Client { 25 class Client {
26 public: 26 public:
27 // Provider will call this method to tell the client to stop using it. 27 // Provider will call this method to tell the client to stop using it.
28 // StopUsingProvider() may be called from any thread. The client should 28 // StopUsingProvider() may be called from any thread. The client should
29 // block until it has PutCurrentFrame() any outstanding frames. 29 // block until it has PutCurrentFrame() any outstanding frames.
30 virtual void StopUsingProvider() = 0; 30 virtual void StopUsingProvider() = 0;
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51 // called after GetCurrentFrame(). Frames passed into this method 51 // called after GetCurrentFrame(). Frames passed into this method
52 // should no longer be referenced after the call is made. Only the current 52 // should no longer be referenced after the call is made. Only the current
53 // provider client should call this function. 53 // provider client should call this function.
54 virtual void PutCurrentFrame( 54 virtual void PutCurrentFrame(
55 const scoped_refptr<media::VideoFrame>& frame) = 0; 55 const scoped_refptr<media::VideoFrame>& frame) = 0;
56 }; 56 };
57 57
58 } // namespace cc 58 } // namespace cc
59 59
60 #endif // CC_LAYERS_VIDEO_FRAME_PROVIDER_H_ 60 #endif // CC_LAYERS_VIDEO_FRAME_PROVIDER_H_
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