| // Copyright 2018 The Fuchsia 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 GARNET_DRIVERS_USB_VIDEO_CAMERA_CONTROL_IMPL_H_ |
| #define GARNET_DRIVERS_USB_VIDEO_CAMERA_CONTROL_IMPL_H_ |
| |
| #include <fbl/unique_ptr.h> |
| #include <fuchsia/camera/cpp/fidl.h> |
| #include <lib/async/cpp/wait.h> |
| #include <lib/fidl/cpp/binding.h> |
| #include <lib/zx/eventpair.h> |
| |
| namespace video { |
| namespace usb { |
| class UsbVideoStream; |
| } |
| } // namespace video |
| |
| namespace camera { |
| |
| class ControlImpl : public fuchsia::camera::Control { |
| public: |
| ControlImpl(video::usb::UsbVideoStream* usb_video_stream, |
| fidl::InterfaceRequest<Control> control, |
| async_dispatcher_t* dispatcher, |
| fit::closure on_connection_closed); |
| |
| // Sent by the driver to the client when a frame is available for processing, |
| // or an error occurred. |
| void OnFrameAvailable(const fuchsia::camera::FrameAvailableEvent& frame); |
| |
| private: |
| // Get the available format types for this device |
| void GetFormats(uint32_t index, GetFormatsCallback callback) override; |
| |
| // Get the vendor and product information for this device |
| void GetDeviceInfo(GetDeviceInfoCallback callback) override; |
| |
| // Sent by the client to indicate desired stream characteristics. |
| // If setting the format is successful, the stream request will be honored. |
| // The |stream_token| allows the camera manager to retain a handle to the |
| // stream that was created, so it can signal the camera driver to kill the |
| // stream if needed. |
| void CreateStream(fuchsia::sysmem::BufferCollectionInfo buffer_collection, |
| fuchsia::camera::FrameRate frame_rate, |
| fidl::InterfaceRequest<fuchsia::camera::Stream> stream, |
| zx::eventpair stream_token) override; |
| |
| void ShutDownStream(); |
| |
| class StreamImpl : public fuchsia::camera::Stream { |
| public: |
| StreamImpl(ControlImpl& owner, |
| fidl::InterfaceRequest<fuchsia::camera::Stream> stream, |
| zx::eventpair stream_token); |
| |
| ~StreamImpl(); |
| |
| // Starts the streaming of frames. |
| void Start() override; |
| |
| // Stops the streaming of frames. |
| void Stop() override; |
| |
| // Unlocks the specified frame, allowing the driver to reuse the memory. |
| void ReleaseFrame(uint32_t buffer_index) override; |
| |
| // Sent by the driver to the client when a frame is available for |
| // processing, or an error occurred. |
| void OnFrameAvailable(const fuchsia::camera::FrameAvailableEvent& frame); |
| |
| private: |
| ControlImpl& owner_; |
| fidl::Binding<Stream> binding_; |
| zx::eventpair stream_token_; |
| async::Wait stream_token_waiter_; |
| }; |
| |
| fbl::unique_ptr<StreamImpl> stream_; |
| |
| fidl::VectorPtr<fuchsia::camera::VideoFormat> formats_; |
| |
| ControlImpl(const ControlImpl&) = delete; |
| ControlImpl& operator=(const ControlImpl&) = delete; |
| |
| fidl::Binding<Control> binding_; |
| |
| video::usb::UsbVideoStream* usb_video_stream_; |
| }; |
| |
| } // namespace camera |
| |
| #endif // GARNET_DRIVERS_USB_VIDEO_CAMERA_CONTROL_IMPL_H_ |