| // Copyright 2019 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 THIRD_PARTY_BLINK_RENDERER_PLATFORM_VIDEO_CAPTURE_LOCAL_VIDEO_CAPTURER_SOURCE_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_PLATFORM_VIDEO_CAPTURE_LOCAL_VIDEO_CAPTURER_SOURCE_H_ |
| |
| #include <memory> |
| #include <string> |
| |
| #include "base/callback.h" |
| #include "base/macros.h" |
| #include "base/memory/weak_ptr.h" |
| #include "base/threading/thread_checker.h" |
| #include "base/unguessable_token.h" |
| #include "media/capture/video_capture_types.h" |
| #include "media/capture/video_capturer_source.h" |
| #include "third_party/blink/public/common/media/video_capture.h" |
| #include "third_party/blink/renderer/platform/platform_export.h" |
| #include "third_party/blink/renderer/platform/wtf/text/wtf_string.h" |
| |
| namespace base { |
| class SingleThreadTaskRunner; |
| } |
| |
| namespace blink { |
| |
| class WebVideoCaptureImplManager; |
| |
| // LocalVideoCapturerSource is a delegate used by MediaStreamVideoCapturerSource |
| // for local video capture. It uses the Render singleton |
| // WebVideoCaptureImplManager to start / stop and receive I420 frames from |
| // Chrome's video capture implementation. This is a main Render thread only |
| // object. |
| class PLATFORM_EXPORT LocalVideoCapturerSource |
| : public media::VideoCapturerSource { |
| public: |
| static std::unique_ptr<media::VideoCapturerSource> Create( |
| scoped_refptr<base::SingleThreadTaskRunner> task_runner, |
| const base::UnguessableToken& session_id); |
| LocalVideoCapturerSource( |
| scoped_refptr<base::SingleThreadTaskRunner> task_runner, |
| const base::UnguessableToken& session_id); |
| ~LocalVideoCapturerSource() override; |
| |
| // VideoCaptureSource Implementation. |
| media::VideoCaptureFormats GetPreferredFormats() override; |
| void StartCapture(const media::VideoCaptureParams& params, |
| const VideoCaptureDeliverFrameCB& new_frame_callback, |
| const RunningCallback& running_callback) override; |
| void RequestRefreshFrame() override; |
| void MaybeSuspend() override; |
| void Resume() override; |
| void StopCapture() override; |
| void OnFrameDropped(media::VideoCaptureFrameDropReason reason) override; |
| void OnLog(const std::string& message) override; |
| media::VideoCaptureFeedbackCB GetFeedbackCallback() const override; |
| |
| private: |
| void OnStateUpdate(blink::VideoCaptureState state); |
| |
| // |session_id_| identifies the capture device used for this capture session. |
| const media::VideoCaptureSessionId session_id_; |
| |
| WebVideoCaptureImplManager* const manager_; |
| |
| base::OnceClosure release_device_cb_; |
| |
| // These two are valid between StartCapture() and StopCapture(). |
| // |running_call_back_| is run when capture is successfully started, and when |
| // it is stopped or error happens. |
| RunningCallback running_callback_; |
| base::OnceClosure stop_capture_cb_; |
| |
| scoped_refptr<base::SingleThreadTaskRunner> task_runner_; |
| |
| // Bound to the main render thread. |
| THREAD_CHECKER(thread_checker_); |
| |
| base::WeakPtrFactory<LocalVideoCapturerSource> weak_factory_{this}; |
| |
| DISALLOW_COPY_AND_ASSIGN(LocalVideoCapturerSource); |
| }; |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_VIDEO_CAPTURE_LOCAL_VIDEO_CAPTURER_SOURCE_H_ |