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// 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 THIRD_PARTY_BLINK_RENDERER_MODULES_MEDIASTREAM_MEDIA_STREAM_VIDEO_CAPTURER_SOURCE_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_MEDIASTREAM_MEDIA_STREAM_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 "media/capture/video_capture_types.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "third_party/blink/public/common/media/video_capture.h"
#include "third_party/blink/public/mojom/mediastream/media_stream.mojom-blink.h"
#include "third_party/blink/public/web/modules/mediastream/media_stream_video_source.h"
#include "third_party/blink/renderer/modules/modules_export.h"
namespace media {
class VideoCapturerSource;
} // namespace media
namespace blink {
class LocalFrame;
// Representation of a video stream coming from a camera, owned by Blink as
// WebMediaStreamSource. Objects of this class are created and live on main
// Render thread. Objects can be constructed either by indicating a |device| to
// look for, or by plugging in a |source| constructed elsewhere.
class MODULES_EXPORT MediaStreamVideoCapturerSource
: public MediaStreamVideoSource {
public:
using DeviceCapturerFactoryCallback =
base::RepeatingCallback<std::unique_ptr<media::VideoCapturerSource>(
const base::UnguessableToken& session_id)>;
MediaStreamVideoCapturerSource(
LocalFrame* frame,
SourceStoppedCallback stop_callback,
std::unique_ptr<media::VideoCapturerSource> source);
MediaStreamVideoCapturerSource(
LocalFrame* frame,
SourceStoppedCallback stop_callback,
const MediaStreamDevice& device,
const media::VideoCaptureParams& capture_params,
DeviceCapturerFactoryCallback device_capturer_factory_callback);
~MediaStreamVideoCapturerSource() override;
void SetDeviceCapturerFactoryCallbackForTesting(
DeviceCapturerFactoryCallback testing_factory_callback);
void SetMediaStreamDispatcherHostForTesting(
mojo::PendingRemote<mojom::blink::MediaStreamDispatcherHost>
dispatcher_host);
media::VideoCapturerSource* GetSourceForTesting();
private:
friend class MediaStreamVideoCapturerSourceTest;
FRIEND_TEST_ALL_PREFIXES(MediaStreamVideoCapturerSourceTest, StartAndStop);
FRIEND_TEST_ALL_PREFIXES(MediaStreamVideoCapturerSourceTest,
CaptureTimeAndMetadataPlumbing);
FRIEND_TEST_ALL_PREFIXES(MediaStreamVideoCapturerSourceTest, ChangeSource);
// MediaStreamVideoSource overrides.
void RequestRefreshFrame() override;
void OnFrameDropped(media::VideoCaptureFrameDropReason reason) override;
void OnLog(const std::string& message) override;
void OnHasConsumers(bool has_consumers) override;
void OnCapturingLinkSecured(bool is_secure) override;
void StartSourceImpl(VideoCaptureDeliverFrameCB frame_callback,
EncodedVideoFrameCB encoded_frame_callback) override;
media::VideoCaptureFeedbackCB GetFeedbackCallback() const override;
void StopSourceImpl() override;
void StopSourceForRestartImpl() override;
void RestartSourceImpl(const media::VideoCaptureFormat& new_format) override;
base::Optional<media::VideoCaptureFormat> GetCurrentFormat() const override;
base::Optional<media::VideoCaptureParams> GetCurrentCaptureParams()
const override;
void ChangeSourceImpl(const MediaStreamDevice& new_device) override;
// Method to bind as RunningCallback in VideoCapturerSource::StartCapture().
void OnRunStateChanged(const media::VideoCaptureParams& new_capture_params,
bool is_running);
mojom::blink::MediaStreamDispatcherHost* GetMediaStreamDispatcherHost();
WeakPersistent<LocalFrame> frame_;
mojo::Remote<mojom::blink::MediaStreamDispatcherHost> host_;
// The source that provides video frames.
std::unique_ptr<media::VideoCapturerSource> source_;
enum State {
STARTING,
STARTED,
STOPPING_FOR_RESTART,
STOPPING_FOR_CHANGE_SOURCE,
RESTARTING,
STOPPED
};
State state_ = STOPPED;
media::VideoCaptureParams capture_params_;
VideoCaptureDeliverFrameCB frame_callback_;
DeviceCapturerFactoryCallback device_capturer_factory_callback_;
DISALLOW_COPY_AND_ASSIGN(MediaStreamVideoCapturerSource);
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_MEDIASTREAM_MEDIA_STREAM_VIDEO_CAPTURER_SOURCE_H_
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