| // Copyright 2014 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 CONTENT_RENDERER_MEDIA_MEDIA_STREAM_VIDEO_CAPTURER_SOURCE_H_ |
| #define CONTENT_RENDERER_MEDIA_MEDIA_STREAM_VIDEO_CAPTURER_SOURCE_H_ |
| |
| #include "base/callback.h" |
| #include "base/gtest_prod_util.h" |
| #include "base/message_loop/message_loop_proxy.h" |
| #include "base/threading/thread_checker.h" |
| #include "content/common/media/video_capture.h" |
| #include "content/renderer/media/media_stream_video_source.h" |
| |
| namespace content { |
| |
| // VideoCapturerDelegate is a delegate used by MediaStreamVideoCapturerSource |
| // for local video capturer. It uses VideoCaptureImplManager to start / stop |
| // and receive I420 frames from Chrome's video capture implementation. |
| // |
| // This is a render thread only object. |
| class CONTENT_EXPORT VideoCapturerDelegate |
| : public base::RefCountedThreadSafe<VideoCapturerDelegate> { |
| public: |
| typedef base::Callback<void(bool running)> RunningCallback; |
| |
| explicit VideoCapturerDelegate( |
| const StreamDeviceInfo& device_info); |
| |
| // Collects the formats that can currently be used. |
| // |max_requested_height| and |max_requested_width| is used by Tab and Screen |
| // capture to decide what resolution to generate. |
| // |callback| is triggered when the formats have been collected. |
| virtual void GetCurrentSupportedFormats( |
| int max_requested_width, |
| int max_requested_height, |
| const VideoCaptureDeviceFormatsCB& callback); |
| |
| // Starts capturing frames using the resolution in |params|. |
| // |new_frame_callback| is triggered when a new video frame is available. |
| // If capturing is started successfully then |running_callback| will be |
| // called with a parameter of true. |
| // If capturing fails to start or stopped due to an external event then |
| // |running_callback| will be called with a parameter of false. |
| virtual void StartCapture( |
| const media::VideoCaptureParams& params, |
| const VideoCaptureDeliverFrameCB& new_frame_callback, |
| const RunningCallback& running_callback); |
| |
| // Stops capturing frames and clears all callbacks including the |
| // SupportedFormatsCallback callback. |
| virtual void StopCapture(); |
| |
| private: |
| FRIEND_TEST_ALL_PREFIXES(MediaStreamVideoCapturerSourceTest, Ended); |
| friend class base::RefCountedThreadSafe<VideoCapturerDelegate>; |
| friend class MockVideoCapturerDelegate; |
| |
| virtual ~VideoCapturerDelegate(); |
| |
| void OnStateUpdateOnRenderThread(VideoCaptureState state); |
| void OnDeviceFormatsInUseReceived(const media::VideoCaptureFormats& formats); |
| void OnDeviceSupportedFormatsEnumerated( |
| const media::VideoCaptureFormats& formats); |
| |
| // The id identifies which video capture device is used for this video |
| // capture session. |
| media::VideoCaptureSessionId session_id_; |
| base::Closure release_device_cb_; |
| base::Closure stop_capture_cb_; |
| |
| bool is_screen_cast_; |
| |
| // |running_callback| is provided to this class in StartCapture and must be |
| // valid until StopCapture is called. |
| RunningCallback running_callback_; |
| |
| VideoCaptureDeviceFormatsCB source_formats_callback_; |
| |
| // Bound to the render thread. |
| base::ThreadChecker thread_checker_; |
| |
| DISALLOW_COPY_AND_ASSIGN(VideoCapturerDelegate); |
| }; |
| |
| // Owned by WebMediaStreamSource in Blink as a representation of a video |
| // stream coming from a camera. |
| // This is a render thread only object. All methods must be called on the |
| // render thread. |
| class CONTENT_EXPORT MediaStreamVideoCapturerSource |
| : public MediaStreamVideoSource { |
| public: |
| MediaStreamVideoCapturerSource( |
| const StreamDeviceInfo& device_info, |
| const SourceStoppedCallback& stop_callback, |
| const scoped_refptr<VideoCapturerDelegate>& delegate); |
| |
| virtual ~MediaStreamVideoCapturerSource(); |
| |
| protected: |
| // Implements MediaStreamVideoSource. |
| virtual void GetCurrentSupportedFormats( |
| int max_requested_width, |
| int max_requested_height, |
| const VideoCaptureDeviceFormatsCB& callback) OVERRIDE; |
| |
| virtual void StartSourceImpl( |
| const media::VideoCaptureParams& params, |
| const VideoCaptureDeliverFrameCB& frame_callback) OVERRIDE; |
| |
| virtual void StopSourceImpl() OVERRIDE; |
| |
| private: |
| // The delegate that provides video frames. |
| scoped_refptr<VideoCapturerDelegate> delegate_; |
| |
| DISALLOW_COPY_AND_ASSIGN(MediaStreamVideoCapturerSource); |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_VIDEO_CAPTURER_SOURCE_H_ |