[Mojo Video Capture] Split OnIncomingCapturedVideoFrame() to OnNewBuffer() + OnFrameReadyInBuffer()

content/browser/renderer_host/media/video_capture_controller.h

 // 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.
 //
 // VideoCaptureController is the glue between a VideoCaptureDevice and all
 // VideoCaptureHosts that have connected to it. A controller exists on behalf of
 // one (and only one) VideoCaptureDevice; both are owned by the
 // VideoCaptureManager.
 //
 // The VideoCaptureController is responsible for:
@@ skipping 36 matching lines @@
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/process/process.h"
 #include "content/browser/renderer_host/media/video_capture_controller_event_handler.h"
 #include "content/common/content_export.h"
 #include "content/common/media/video_capture.h"
 #include "media/capture/video/video_frame_receiver.h"
 #include "media/capture/video_capture_types.h"
 
-namespace media {
-class FrameBufferPool;
-}
-
 namespace content {
 
 class CONTENT_EXPORT VideoCaptureController : public media::VideoFrameReceiver {
  public:
   VideoCaptureController();
   ~VideoCaptureController() override;
 
   base::WeakPtr<VideoCaptureController> GetWeakPtrForIOThread();
 
   // Factory code creating instances of VideoCaptureController may optionally
-  // set a FrameBufferPool. Setting the host is done in this method
-  // separate from the constructor to allow clients to create and use instances
-  // before they can provide the observer. (This is the case with
-  // VideoCaptureManager).
-  void SetFrameBufferPool(
-      std::unique_ptr<media::FrameBufferPool> frame_buffer_pool);
-
-  // Factory code creating instances of VideoCaptureController may optionally
   // set a VideoFrameConsumerFeedbackObserver. Setting the observer is done in
   // this method separate from the constructor to allow clients to create and
   // use instances before they can provide the observer. (This is the case with
   // VideoCaptureManager).
   void SetConsumerFeedbackObserver(
       std::unique_ptr<media::VideoFrameConsumerFeedbackObserver> observer);
 
   // Start video capturing and try to use the resolution specified in |params|.
   // Buffers will be shared to the client as necessary. The client will continue
   // to receive frames from the device until RemoveClient() is called.
@@ skipping 39 matching lines @@
                     VideoCaptureControllerEventHandler* event_handler,
                     int buffer_id,
                     const gpu::SyncToken& sync_token,
                     double consumer_resource_utilization);
 
   const media::VideoCaptureFormat& GetVideoCaptureFormat() const;
 
   bool has_received_frames() const { return has_received_frames_; }
 
   // Implementation of media::VideoFrameReceiver interface:
-  void OnIncomingCapturedVideoFrame(
-      media::VideoCaptureDevice::Client::Buffer buffer,
-      scoped_refptr<media::VideoFrame> frame) override;
+  void OnNewBufferHandle(
+      int buffer_id,
+      std::unique_ptr<media::BufferHandleProvider> handle_provider) override;
+  void OnFrameReadyInBuffer(
+      int buffer_id,
+      int frame_feedback_id,
+      std::unique_ptr<media::Ownership> buffer_read_permission,
+      media::mojom::VideoFrameInfoPtr frame_info) override;
+  void OnBufferRetired(int buffer_id) override;
   void OnError() override;
   void OnLog(const std::string& message) override;
-  void OnBufferDestroyed(int buffer_id_to_drop) override;
 
  private:
   struct ControllerClient;
   typedef std::list<std::unique_ptr<ControllerClient>> ControllerClients;
 
   class BufferState {
    public:
     explicit BufferState(
         int buffer_id,
-        int frame_feedback_id,
         media::VideoFrameConsumerFeedbackObserver* consumer_feedback_observer,
-        media::FrameBufferPool* frame_buffer_pool);
+        mojo::ScopedSharedBufferHandle handle);
+    BufferState(BufferState&& other);
     ~BufferState();
-    BufferState(const BufferState& other);
+    BufferState& operator=(BufferState&& other);
+
+    int buffer_id() const { return buffer_id_; }
+    bool is_retired() const { return is_retired_; }
+    void set_read_permission(
+        std::unique_ptr<media::Ownership> buffer_read_permission);
+    void set_frame_feedback_id(int frame_feedback_id);
+    void set_is_retired() { is_retired_ = true; }
     void RecordConsumerUtilization(double utilization);
     void IncreaseConsumerCount();
     void DecreaseConsumerCount();
     bool HasZeroConsumerHoldCount();
+    mojo::ScopedSharedBufferHandle CreateHandleCopy();
     void SetConsumerFeedbackObserver(
         media::VideoFrameConsumerFeedbackObserver* consumer_feedback_observer);
-    void SetFrameBufferPool(media::FrameBufferPool* frame_buffer_pool);
 
    private:
-    const int buffer_id_;
-    const int frame_feedback_id_;
+    int buffer_id_;
+    bool is_retired_ = false;
+    int frame_feedback_id_;
     media::VideoFrameConsumerFeedbackObserver* consumer_feedback_observer_;
-    media::FrameBufferPool* frame_buffer_pool_;
+    mojo::ScopedSharedBufferHandle buffer_handle_;
     double max_consumer_utilization_;
     int consumer_hold_count_;
+    std::unique_ptr<media::Ownership> buffer_read_permission_;
   };
 
   // Find a client of |id| and |handler| in |clients|.
   ControllerClient* FindClient(VideoCaptureControllerID id,
                                VideoCaptureControllerEventHandler* handler,
                                const ControllerClients& clients);
 
   // Find a client of |session_id| in |clients|.
   ControllerClient* FindClient(int session_id,
                                const ControllerClients& clients);
 
-  std::unique_ptr<media::FrameBufferPool> frame_buffer_pool_;
+  void OnClientFinishedConsumingBuffer(ControllerClient* client,
+                                       int buffer_id,
+                                       double consumer_resource_utilization);
+  void ReleaseBufferState(
+      const std::vector<BufferState>::iterator& buffer_state_iter);
 
   std::unique_ptr<media::VideoFrameConsumerFeedbackObserver>
       consumer_feedback_observer_;
 
-  std::map<int, BufferState> buffer_id_to_state_map_;
+  std::vector<BufferState> buffer_states_;
 
   // All clients served by this controller.
   ControllerClients controller_clients_;
 
   // Takes on only the states 'STARTED' and 'ERROR'. 'ERROR' is an absorbing
   // state which stops the flow of data to clients.
   VideoCaptureState state_;
 
   // True if the controller has received a video frame from the device.
   bool has_received_frames_;
 
   media::VideoCaptureFormat video_capture_format_;
 
   base::WeakPtrFactory<VideoCaptureController> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoCaptureController);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_CONTROLLER_H_