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// Copyright 2018 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 COMPONENTS_VIZ_HOST_CLIENT_FRAME_SINK_VIDEO_CAPTURER_H_
#define COMPONENTS_VIZ_HOST_CLIENT_FRAME_SINK_VIDEO_CAPTURER_H_
#include "base/callback.h"
#include "base/time/time.h"
#include "components/viz/common/surfaces/frame_sink_id.h"
#include "components/viz/host/viz_host_export.h"
#include "media/base/video_types.h"
#include "mojo/public/cpp/bindings/binding.h"
#include "services/viz/privileged/interfaces/compositing/frame_sink_video_capture.mojom.h"
#include "ui/gfx/geometry/size.h"
namespace viz {
// Client library for using FrameSinkVideoCapturer. Clients should use this
// class instead of talking directly to FrameSinkVideoCapturer in order to
// survive Viz crashes.
// TODO(samans): Move this class and all its dependencies to the client
// directory.
class VIZ_HOST_EXPORT ClientFrameSinkVideoCapturer
: private mojom::FrameSinkVideoConsumer {
public:
using EstablishConnectionCallback =
base::RepeatingCallback<void(mojom::FrameSinkVideoCapturerRequest)>;
explicit ClientFrameSinkVideoCapturer(EstablishConnectionCallback callback);
~ClientFrameSinkVideoCapturer() override;
// See FrameSinkVideoCapturer for documentation.
void SetFormat(media::VideoPixelFormat format, media::ColorSpace color_space);
void SetMinCapturePeriod(base::TimeDelta min_capture_period);
void SetMinSizeChangePeriod(base::TimeDelta min_period);
void SetResolutionConstraints(const gfx::Size& min_size,
const gfx::Size& max_size,
bool use_fixed_aspect_ratio);
void SetAutoThrottlingEnabled(bool enabled);
void ChangeTarget(const FrameSinkId& frame_sink_id);
void Stop();
void RequestRefreshFrame();
// Similar to FrameSinkVideoCapturer::Start, but takes in a pointer directly
// to the FrameSinkVideoConsumer implemenation class (as opposed to a
// mojo::InterfacePtr or a proxy object).
void Start(mojom::FrameSinkVideoConsumer* consumer);
// Similar to Stop() but also resets the consumer immediately so no further
// messages (even OnStopped()) will be delivered to the consumer.
void StopAndResetConsumer();
private:
struct Format {
Format(media::VideoPixelFormat pixel_format, media::ColorSpace color_space);
media::VideoPixelFormat pixel_format;
media::ColorSpace color_space;
};
struct ResolutionConstraints {
ResolutionConstraints(const gfx::Size& min_size,
const gfx::Size& max_size,
bool use_fixed_aspect_ratio);
gfx::Size min_size;
gfx::Size max_size;
bool use_fixed_aspect_ratio;
};
// mojom::FrameSinkVideoConsumer implementation.
void OnFrameCaptured(
mojo::ScopedSharedBufferHandle buffer,
uint32_t buffer_size,
media::mojom::VideoFrameInfoPtr info,
const gfx::Rect& update_rect,
const gfx::Rect& content_rect,
mojom::FrameSinkVideoConsumerFrameCallbacksPtr callbacks) final;
void OnTargetLost(const FrameSinkId& frame_sink_id) final;
void OnStopped() final;
// Establishes connection to FrameSinkVideoCapturer and sends the existing
// configuration.
void EstablishConnection();
// Called when the message pipe is gone. Will call EstablishConnection after
// some delay.
void OnConnectionError();
void StartInternal();
// The following variables keep the latest arguments provided to their
// corresponding method in mojom::FrameSinkVideoCapturer. The arguments are
// saved so we can resend them if viz crashes and a new FrameSinkVideoCapturer
// has to be created.
base::Optional<Format> format_;
base::Optional<base::TimeDelta> min_capture_period_;
base::Optional<base::TimeDelta> min_size_change_period_;
base::Optional<ResolutionConstraints> resolution_constraints_;
base::Optional<bool> auto_throttling_enabled_;
base::Optional<FrameSinkId> target_;
bool is_started_ = false;
mojom::FrameSinkVideoConsumer* consumer_ = nullptr;
EstablishConnectionCallback establish_connection_callback_;
mojom::FrameSinkVideoCapturerPtr capturer_;
mojo::Binding<mojom::FrameSinkVideoConsumer> consumer_binding_;
base::WeakPtrFactory<ClientFrameSinkVideoCapturer> weak_factory_;
};
} // namespace viz
#endif // COMPONENTS_VIZ_HOST_CLIENT_FRAME_SINK_VIDEO_CAPTURER_H_
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