| // Copyright 2017 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_SERVICE_VIDEO_CAPTURE_PROVIDER_H_ |
| #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_SERVICE_VIDEO_CAPTURE_PROVIDER_H_ |
| |
| #include "base/threading/sequence_bound.h" |
| #include "base/threading/thread_checker.h" |
| #include "base/time/time.h" |
| #include "build/build_config.h" |
| #include "build/chromeos_buildflags.h" |
| #include "content/browser/renderer_host/media/ref_counted_video_source_provider.h" |
| #include "content/browser/renderer_host/media/video_capture_provider.h" |
| #include "content/common/content_export.h" |
| #include "content/public/browser/service_process_host.h" |
| #include "services/video_capture/public/mojom/video_capture_service.mojom.h" |
| |
| namespace content { |
| |
| // Implementation of VideoCaptureProvider that uses |
| // video_capture::mojom::VideoCaptureService. |
| // |
| // Connects to the service lazily on demand and disconnects from the service as |
| // soon as all previously handed out VideoCaptureDeviceLauncher instances have |
| // been released and no more answers to GetDeviceInfosAsync() calls are pending. |
| class CONTENT_EXPORT ServiceVideoCaptureProvider |
| : public VideoCaptureProvider, |
| public ServiceProcessHost::Observer { |
| public: |
| // This constructor uses a default factory for instances of |
| // viz::mojom::Gpu which produces instances of class content::GpuClient. |
| explicit ServiceVideoCaptureProvider( |
| base::RepeatingCallback<void(const std::string&)> emit_log_message_cb); |
| |
| #if BUILDFLAG(IS_CHROMEOS_ASH) |
| using CreateAcceleratorFactoryCallback = base::RepeatingCallback< |
| std::unique_ptr<video_capture::mojom::AcceleratorFactory>()>; |
| // Lets clients provide a custom factory method for creating instances of |
| // viz::mojom::Gpu. |
| ServiceVideoCaptureProvider( |
| CreateAcceleratorFactoryCallback create_accelerator_factory_cb, |
| base::RepeatingCallback<void(const std::string&)> emit_log_message_cb); |
| #endif // BUILDFLAG(IS_CHROMEOS_ASH) |
| |
| ~ServiceVideoCaptureProvider() override; |
| |
| // VideoCaptureProvider implementation. |
| void GetDeviceInfosAsync(GetDeviceInfosCallback result_callback) override; |
| std::unique_ptr<VideoCaptureDeviceLauncher> CreateDeviceLauncher() override; |
| |
| private: |
| void OnServiceStarted(); |
| void OnServiceStopped(); |
| |
| enum class ReasonForDisconnect { kShutdown, kUnused, kConnectionLost }; |
| |
| void OnLauncherConnectingToSourceProvider( |
| scoped_refptr<RefCountedVideoSourceProvider>* out_provider); |
| // Discarding the returned RefCountedVideoSourceProvider indicates that the |
| // caller no longer requires the connection to the service and allows it to |
| // disconnect. |
| [[nodiscard]] scoped_refptr<RefCountedVideoSourceProvider> |
| LazyConnectToService(); |
| |
| void GetDeviceInfosAsyncForRetry(GetDeviceInfosCallback result_callback, |
| int retry_count); |
| void OnDeviceInfosReceived( |
| scoped_refptr<RefCountedVideoSourceProvider> service_connection, |
| GetDeviceInfosCallback result_callback, |
| int retry_count, |
| const std::vector<media::VideoCaptureDeviceInfo>& infos); |
| void OnDeviceInfosRequestDropped( |
| scoped_refptr<RefCountedVideoSourceProvider> service_connection, |
| GetDeviceInfosCallback result_callback, |
| int retry_count); |
| void OnLostConnectionToSourceProvider(); |
| void OnServiceConnectionClosed(ReasonForDisconnect reason); |
| |
| #if BUILDFLAG(IS_CHROMEOS_ASH) |
| CreateAcceleratorFactoryCallback create_accelerator_factory_cb_; |
| #endif // BUILDFLAG(IS_CHROMEOS_ASH) |
| base::RepeatingCallback<void(const std::string&)> emit_log_message_cb_; |
| |
| base::WeakPtr<RefCountedVideoSourceProvider> weak_service_connection_; |
| |
| bool launcher_has_connected_to_source_provider_; |
| base::TimeTicks time_of_last_connect_; |
| base::TimeTicks time_of_last_uninitialize_; |
| |
| #if BUILDFLAG(IS_MAC) |
| GetDeviceInfosCallback stashed_result_callback_for_retry_; |
| int stashed_retry_count_; |
| #endif |
| |
| // We own this but it must operate on the UI thread. |
| class ServiceProcessObserver; |
| absl::optional<base::SequenceBound<ServiceProcessObserver>> |
| service_process_observer_; |
| |
| base::WeakPtrFactory<ServiceVideoCaptureProvider> weak_ptr_factory_{this}; |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_BROWSER_RENDERER_HOST_MEDIA_SERVICE_VIDEO_CAPTURE_PROVIDER_H_ |