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// Copyright (c) 2012 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 CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_HOST_H_
#define CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_HOST_H_
#include <map>
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "base/sequenced_task_runner_helpers.h"
#include "content/browser/renderer_host/media/video_capture_controller.h"
#include "content/browser/renderer_host/media/video_capture_controller_event_handler.h"
#include "content/common/content_export.h"
#include "media/capture/mojom/video_capture.mojom.h"
namespace content {
class MediaStreamManager;
// VideoCaptureHost is the IO thread browser process communication endpoint
// between a renderer process (which can initiate and receive a video capture
// stream) and a VideoCaptureController in the browser process (which provides
// the stream from a video device). Every remote client is identified via a
// unique |device_id|, and is paired with a single VideoCaptureController.
class CONTENT_EXPORT VideoCaptureHost
: public VideoCaptureControllerEventHandler,
public media::mojom::VideoCaptureHost {
public:
VideoCaptureHost(uint32_t render_process_id,
MediaStreamManager* media_stream_manager);
class RenderProcessHostDelegate;
VideoCaptureHost(std::unique_ptr<RenderProcessHostDelegate> delegate,
MediaStreamManager* media_stream_manager);
~VideoCaptureHost() override;
static void Create(uint32_t render_process_id,
MediaStreamManager* media_stream_manager,
media::mojom::VideoCaptureHostRequest request);
// Interface for notifying RenderProcessHost instance about active video
// capture stream changes.
class CONTENT_EXPORT RenderProcessHostDelegate {
public:
virtual ~RenderProcessHostDelegate();
virtual void NotifyStreamAdded() = 0;
virtual void NotifyStreamRemoved() = 0;
};
private:
friend class VideoCaptureTest;
FRIEND_TEST_ALL_PREFIXES(VideoCaptureTest, IncrementMatchesDecrementCalls);
// VideoCaptureControllerEventHandler implementation.
void OnError(VideoCaptureControllerID id,
media::VideoCaptureError error) override;
void OnNewBuffer(VideoCaptureControllerID id,
media::mojom::VideoBufferHandlePtr buffer_handle,
int buffer_id) override;
void OnBufferDestroyed(VideoCaptureControllerID id,
int buffer_id) override;
void OnBufferReady(
VideoCaptureControllerID id,
int buffer_id,
const media::mojom::VideoFrameInfoPtr& frame_info) override;
void OnEnded(VideoCaptureControllerID id) override;
void OnStarted(VideoCaptureControllerID id) override;
void OnStartedUsingGpuDecode(VideoCaptureControllerID id) override;
// media::mojom::VideoCaptureHost implementation
void Start(int32_t device_id,
int32_t session_id,
const media::VideoCaptureParams& params,
media::mojom::VideoCaptureObserverPtr observer) override;
void Stop(int32_t device_id) override;
void Pause(int32_t device_id) override;
void Resume(int32_t device_id,
int32_t session_id,
const media::VideoCaptureParams& params) override;
void RequestRefreshFrame(int32_t device_id) override;
void ReleaseBuffer(int32_t device_id,
int32_t buffer_id,
double consumer_resource_utilization) override;
void GetDeviceSupportedFormats(
int32_t device_id,
int32_t session_id,
GetDeviceSupportedFormatsCallback callback) override;
void GetDeviceFormatsInUse(int32_t device_id,
int32_t session_id,
GetDeviceFormatsInUseCallback callback) override;
void DoError(VideoCaptureControllerID id, media::VideoCaptureError error);
void DoEnded(VideoCaptureControllerID id);
// Bound as callback for VideoCaptureManager::StartCaptureForClient().
void OnControllerAdded(
int device_id,
const base::WeakPtr<VideoCaptureController>& controller);
// Helper function that deletes the controller and tells VideoCaptureManager
// to StopCaptureForClient(). |on_error| is true if this is triggered by
// VideoCaptureControllerEventHandler::OnError.
void DeleteVideoCaptureController(VideoCaptureControllerID controller_id,
media::VideoCaptureError error);
void NotifyStreamAdded();
void NotifyStreamRemoved();
void NotifyAllStreamsRemoved();
class RenderProcessHostDelegateImpl;
std::unique_ptr<RenderProcessHostDelegate> render_process_host_delegate_;
uint32_t number_of_active_streams_ = 0;
MediaStreamManager* const media_stream_manager_;
// A map of VideoCaptureControllerID to the VideoCaptureController to which it
// is connected. An entry in this map holds a null controller while it is in
// the process of starting.
std::map<VideoCaptureControllerID, base::WeakPtr<VideoCaptureController>>
controllers_;
// VideoCaptureObservers map, each one is used and should be valid between
// Start() and the corresponding Stop().
std::map<int32_t, media::mojom::VideoCaptureObserverPtr>
device_id_to_observer_map_;
base::WeakPtrFactory<VideoCaptureHost> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(VideoCaptureHost);
};
} // namespace content
#endif // CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_HOST_H_