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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 // Implementation notes: This needs to work on a variety of hardware | 5 // Implementation notes: This needs to work on a variety of hardware |
6 // configurations where the speed of the CPU and GPU greatly affect overall | 6 // configurations where the speed of the CPU and GPU greatly affect overall |
7 // performance. Spanning several threads, the process of capturing has been | 7 // performance. Spanning several threads, the process of capturing has been |
8 // split up into four conceptual stages: | 8 // split up into four conceptual stages: |
9 // | 9 // |
10 // 1. Reserve Buffer: Before a frame can be captured, a slot in the client's | 10 // 1. Reserve Buffer: Before a frame can be captured, a slot in the client's |
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659 start_time, target, deliver_frame_cb)); | 659 start_time, target, deliver_frame_cb)); |
660 } else if (view->CanCopyToVideoFrame()) { | 660 } else if (view->CanCopyToVideoFrame()) { |
661 view->CopyFromCompositingSurfaceToVideoFrame( | 661 view->CopyFromCompositingSurfaceToVideoFrame( |
662 gfx::Rect(view_size), | 662 gfx::Rect(view_size), |
663 target, | 663 target, |
664 base::Bind(&WebContentsCaptureMachine:: | 664 base::Bind(&WebContentsCaptureMachine:: |
665 DidCopyFromCompositingSurfaceToVideoFrame, | 665 DidCopyFromCompositingSurfaceToVideoFrame, |
666 weak_ptr_factory_.GetWeakPtr(), | 666 weak_ptr_factory_.GetWeakPtr(), |
667 start_time, deliver_frame_cb)); | 667 start_time, deliver_frame_cb)); |
668 } else { | 668 } else { |
669 SkBitmap::Config preffered_format = rwh->PreferredReadbackFormat(); | |
piman
2014/03/10 18:27:20
typo: preferred_format
sivag
2014/03/11 14:41:50
Done.
| |
669 rwh->CopyFromBackingStore( | 670 rwh->CopyFromBackingStore( |
670 gfx::Rect(), | 671 gfx::Rect(), |
671 fitted_size, // Size here is a request not always honored. | 672 fitted_size, // Size here is a request not always honored. |
672 base::Bind(&WebContentsCaptureMachine::DidCopyFromBackingStore, | 673 base::Bind(&WebContentsCaptureMachine::DidCopyFromBackingStore, |
673 weak_ptr_factory_.GetWeakPtr(), | 674 weak_ptr_factory_.GetWeakPtr(), |
674 start_time, target, deliver_frame_cb)); | 675 start_time, |
676 target, | |
677 deliver_frame_cb), | |
678 preffered_format); | |
piman
2014/03/10 18:27:20
The receiving code only accepts RGBA8888, see Rend
sivag
2014/03/11 14:41:50
Done.
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675 } | 679 } |
676 } | 680 } |
677 | 681 |
678 bool WebContentsCaptureMachine::StartObservingWebContents() { | 682 bool WebContentsCaptureMachine::StartObservingWebContents() { |
679 // Look-up the RenderViewHost and, from that, the WebContents that wraps it. | 683 // Look-up the RenderViewHost and, from that, the WebContents that wraps it. |
680 // If successful, begin observing the WebContents instance. | 684 // If successful, begin observing the WebContents instance. |
681 // | 685 // |
682 // Why this can be unsuccessful: The request for mirroring originates in a | 686 // Why this can be unsuccessful: The request for mirroring originates in a |
683 // render process, and this request is based on the current RenderView | 687 // render process, and this request is based on the current RenderView |
684 // associated with a tab. However, by the time we get up-and-running here, | 688 // associated with a tab. However, by the time we get up-and-running here, |
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818 scoped_ptr<Client> client) { | 822 scoped_ptr<Client> client) { |
819 DVLOG(1) << "Allocating " << params.requested_format.frame_size.ToString(); | 823 DVLOG(1) << "Allocating " << params.requested_format.frame_size.ToString(); |
820 core_->AllocateAndStart(params, client.Pass()); | 824 core_->AllocateAndStart(params, client.Pass()); |
821 } | 825 } |
822 | 826 |
823 void WebContentsVideoCaptureDevice::StopAndDeAllocate() { | 827 void WebContentsVideoCaptureDevice::StopAndDeAllocate() { |
824 core_->StopAndDeAllocate(); | 828 core_->StopAndDeAllocate(); |
825 } | 829 } |
826 | 830 |
827 } // namespace content | 831 } // namespace content |
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