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// Copyright 2015 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_MEDIACAPTUREFROMELEMENT_HTML_VIDEO_ELEMENT_CAPTURER_SOURCE_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_MEDIACAPTUREFROMELEMENT_HTML_VIDEO_ELEMENT_CAPTURER_SOURCE_H_
#include "base/functional/callback.h"
#include "base/memory/weak_ptr.h"
#include "base/threading/thread_checker.h"
#include "base/time/time.h"
#include "media/base/video_types.h"
#include "third_party/blink/renderer/modules/modules_export.h"
#include "third_party/blink/renderer/platform/video_capture/video_capturer_source.h"
namespace base {
class SingleThreadTaskRunner;
}
namespace blink {
class WebMediaPlayer;
// This class is a VideoCapturerSource taking video snapshots of the ctor-passed
// blink::WebMediaPlayer on Render Main thread. The captured data is converted
// and sent back to |io_task_runner_| via the registered |new_frame_callback_|.
class MODULES_EXPORT HtmlVideoElementCapturerSource final
: public VideoCapturerSource {
public:
static std::unique_ptr<HtmlVideoElementCapturerSource>
CreateFromWebMediaPlayerImpl(
blink::WebMediaPlayer* player,
const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner,
scoped_refptr<base::SingleThreadTaskRunner> task_runner);
HtmlVideoElementCapturerSource(
const base::WeakPtr<blink::WebMediaPlayer>& player,
const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner,
scoped_refptr<base::SingleThreadTaskRunner> task_runner);
HtmlVideoElementCapturerSource(const HtmlVideoElementCapturerSource&) =
delete;
HtmlVideoElementCapturerSource& operator=(
const HtmlVideoElementCapturerSource&) = delete;
~HtmlVideoElementCapturerSource() override;
// VideoCapturerSource Implementation.
media::VideoCaptureFormats GetPreferredFormats() override;
void StartCapture(const media::VideoCaptureParams& params,
VideoCaptureCallbacks video_capture_callbacks,
VideoCaptureRunningCallbackCB running_callback) override;
void StopCapture() override;
private:
friend class HTMLVideoElementCapturerSourceTest;
// This method includes collecting data from the WebMediaPlayer and converting
// it into a format suitable for MediaStreams.
void sendNewFrame();
gfx::Size natural_size_;
const base::WeakPtr<blink::WebMediaPlayer> web_media_player_;
const scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
const scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
// These three configuration items are passed on StartCapture();
VideoCaptureRunningCallbackCB running_callback_;
VideoCaptureDeliverFrameCB new_frame_callback_;
double capture_frame_rate_;
// base::TimeTicks on which the first captured VideoFrame is produced.
base::TimeTicks start_capture_time_;
// Target time for the next frame.
base::TimeTicks next_capture_time_;
// Bound to the main render thread.
THREAD_CHECKER(thread_checker_);
// Used on main render thread to schedule future capture events.
base::WeakPtrFactory<HtmlVideoElementCapturerSource> weak_factory_{this};
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_MEDIACAPTUREFROMELEMENT_HTML_VIDEO_ELEMENT_CAPTURER_SOURCE_H_
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