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// Copyright 2019 The Chromium Authors
// 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_MODULES_MEDIASTREAM_LOCAL_VIDEO_CAPTURER_SOURCE_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_MEDIASTREAM_LOCAL_VIDEO_CAPTURER_SOURCE_H_
#include <memory>
#include <string>
#include "base/functional/callback.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/threading/thread_checker.h"
#include "base/token.h"
#include "base/unguessable_token.h"
#include "media/capture/video_capture_types.h"
#include "third_party/blink/public/common/tokens/tokens.h"
#include "third_party/blink/public/platform/media/video_capture.h"
#include "third_party/blink/renderer/modules/modules_export.h"
#include "third_party/blink/renderer/platform/video_capture/video_capturer_source.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
namespace base {
class SingleThreadTaskRunner;
}
namespace blink {
class LocalFrame;
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 MODULES_EXPORT LocalVideoCapturerSource : public VideoCapturerSource {
public:
static std::unique_ptr<VideoCapturerSource> Create(
scoped_refptr<base::SingleThreadTaskRunner> task_runner,
LocalFrame* frame,
const base::UnguessableToken& session_id);
LocalVideoCapturerSource(
scoped_refptr<base::SingleThreadTaskRunner> task_runner,
LocalFrame* frame,
const base::UnguessableToken& session_id);
LocalVideoCapturerSource(const LocalVideoCapturerSource&) = delete;
LocalVideoCapturerSource& operator=(const LocalVideoCapturerSource&) = delete;
~LocalVideoCapturerSource() override;
// VideoCaptureSource Implementation.
media::VideoCaptureFormats GetPreferredFormats() override;
void StartCapture(const media::VideoCaptureParams& params,
VideoCaptureCallbacks video_capture_callbacks,
VideoCaptureRunningCallbackCB running_callback) override;
void RequestRefreshFrame() override;
void MaybeSuspend() override;
void Resume() override;
void StopCapture() 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_;
const raw_ptr<WebVideoCaptureImplManager> manager_;
LocalFrameToken frame_token_;
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.
VideoCaptureRunningCallbackCB 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};
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_MEDIASTREAM_LOCAL_VIDEO_CAPTURER_SOURCE_H_
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