Define EncodedVideoSource and RtcCapturedEncodingVideoCapturer.

content/renderer/media/video_capture_impl.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.
 
 // VideoCaptureImpl represents a capture device in renderer process. It provides
 // interfaces for clients to Start/Stop capture. It also communicates to clients
 // when buffer is ready, state of capture device is changed.
 
 // VideoCaptureImpl is also a delegate of VideoCaptureMessageFilter which
 // relays operation of capture device to browser process and receives response
 // from browser process.
 
 // The media::VideoCapture and VideoCaptureMessageFilter::Delegate are
 // asynchronous interfaces, which means callers can call those interfaces
 // from any threads without worrying about thread safety.
 // The |capture_message_loop_proxy_| is the working thread of VideoCaptureImpl.
 // All non-const members are accessed only on that working thread.
 
 #ifndef CONTENT_RENDERER_MEDIA_VIDEO_CAPTURE_IMPL_H_
 #define CONTENT_RENDERER_MEDIA_VIDEO_CAPTURE_IMPL_H_
 
 #include <list>
 #include <map>
 
 #include "content/common/content_export.h"
 #include "content/common/media/video_capture.h"
 #include "content/renderer/media/video_capture_message_filter.h"
 #include "media/video/capture/video_capture.h"
 #include "media/video/capture/video_capture_types.h"
+#include "media/video/encoded_video_source.h"
 
 namespace base {
 class MessageLoopProxy;
 }
 
 namespace content {
 
 class CONTENT_EXPORT VideoCaptureImpl
-    : public media::VideoCapture, public VideoCaptureMessageFilter::Delegate {
+    : public media::VideoCapture,
+      public VideoCaptureMessageFilter::Delegate,
+      public media::EncodedVideoSource {
  public:
   // media::VideoCapture interface.
   virtual void StartCapture(
       media::VideoCapture::EventHandler* handler,
       const media::VideoCaptureCapability& capability) OVERRIDE;
   virtual void StopCapture(media::VideoCapture::EventHandler* handler) OVERRIDE;
   virtual void FeedBuffer(scoped_refptr<VideoFrameBuffer> buffer) OVERRIDE;
   virtual bool CaptureStarted() OVERRIDE;
   virtual int CaptureWidth() OVERRIDE;
   virtual int CaptureHeight() OVERRIDE;
   virtual int CaptureFrameRate() OVERRIDE;
 
   // VideoCaptureMessageFilter::Delegate interface.
   virtual void OnBufferCreated(base::SharedMemoryHandle handle,
                                int length, int buffer_id) OVERRIDE;
   virtual void OnBufferReceived(int buffer_id, base::Time timestamp) OVERRIDE;
   virtual void OnStateChanged(VideoCaptureState state) OVERRIDE;
   virtual void OnDeviceInfoReceived(
       const media::VideoCaptureParams& device_info) OVERRIDE;
   virtual void OnDelegateAdded(int32 device_id) OVERRIDE;
+  virtual void OnEncodingCapabilitiesAvailable(
+          const media::VideoEncodingCapabilities& capabilities) OVERRIDE;
+  virtual void OnEncodedBitstreamOpened(
+      const media::VideoEncodingParameters& params,
+      const std::vector<base::SharedMemoryHandle>& buffers,
+      uint32 buffer_size) OVERRIDE;
+  virtual void OnEncodedBitstreamClosed() OVERRIDE;
+  virtual void OnEncodingConfigChanged(
+      const media::RuntimeVideoEncodingParameters& params) OVERRIDE;
+  virtual void OnEncodedBufferReady(
+      int buffer_id,
+      uint32 size,
+      const media::BufferEncodingMetadata& metadata) OVERRIDE;
+
+  // media::EncodedVideoSource interface.
+  virtual void RequestCapabilities(
+      const RequestCapabilitiesCallback& callback) OVERRIDE;
+  virtual void OpenBitstream(
+      media::EncodedVideoSource::Client* client,
+      const media::VideoEncodingParameters& params) OVERRIDE;
+  virtual void CloseBitstream() OVERRIDE;
+  virtual void ReturnBitstreamBuffer(
+      scoped_refptr<const media::EncodedBitstreamBuffer> buffer) OVERRIDE;
+  virtual void TrySetBitstreamConfig(
+      const media::RuntimeVideoEncodingParameters& params) OVERRIDE;
 
   // Stop/resume delivering video frames to clients, based on flag |suspend|.
   virtual void SuspendCapture(bool suspend);
 
  private:
   friend class VideoCaptureImplManager;
   friend class VideoCaptureImplTest;
   friend class MockVideoCaptureImpl;
 
   struct DIBBuffer;
@@ skipping 14 matching lines @@
   void DoBufferCreatedOnCaptureThread(base::SharedMemoryHandle handle,
                                       int length, int buffer_id);
   void DoBufferReceivedOnCaptureThread(int buffer_id, base::Time timestamp);
   void DoStateChangedOnCaptureThread(VideoCaptureState state);
   void DoDeviceInfoReceivedOnCaptureThread(
       const media::VideoCaptureParams& device_info);
   void DoDelegateAddedOnCaptureThread(int32 device_id);
 
   void DoSuspendCaptureOnCaptureThread(bool suspend);
 
+  void StartFetchCapabilities();
+  void DoRequestCapabilitiesOnCaptureThread(
+      const RequestCapabilitiesCallback& callback);
+  void DoOpenBitstreamOnCaptureThread(
+      media::EncodedVideoSource::Client* client,
+      const media::VideoEncodingParameters& params);
+  void DoCloseBitstreamOnCaptureThread();
+  void DoNotifyBitstreamOpenedOnCaptureThread(
+      const media::VideoEncodingParameters& params,
+      const std::vector<base::SharedMemoryHandle>& buffers,
+      uint32 buffer_size);
+  void DoNotifyBitstreamClosedOnCaptureThread();
+  void DoNotifyBitstreamConfigChangedOnCaptureThread(
+      const media::RuntimeVideoEncodingParameters& params);
+  void DoNotifyBitstreamBufferReadyOnCaptureThread(
+      int buffer_id, uint32 size,
+      const media::BufferEncodingMetadata& metadata);
+  void DoNotifyCapabilitiesAvailableOnCaptureThread(
+      const media::VideoEncodingCapabilities& capabilities);
+
   void Init();
   void DeInit(base::Closure task);
   void DoDeInitOnCaptureThread(base::Closure task);
   void StopDevice();
   void RestartCapture();
   void StartCaptureInternal();
   void AddDelegateOnIOThread();
   void RemoveDelegateOnIOThread(base::Closure task);
   virtual void Send(IPC::Message* message);
 
@@ skipping 22 matching lines @@
   // starts with StartCapture and ends with StopCapture.
   media::VideoCaptureParams current_params_;
 
   // The information about the device sent from browser process side.
   media::VideoCaptureParams device_info_;
   bool device_info_available_;
 
   bool suspended_;
   VideoCaptureState state_;
 
+  // Video encoding capabilities as reported by the device.
+  media::VideoEncodingCapabilities encoding_caps_;
+  // Callback for RequestCapabilities().
+  RequestCapabilitiesCallback encoding_caps_callback_;
+  // Pointer to the EVS client.
+  media::EncodedVideoSource::Client* encoded_video_source_client_;
+  // Bitstream buffers returned by the video capture device. Unowned.
+  std::vector<base::SharedMemory*> bitstream_buffers_;
+  // |bitstream_opened_| is set to true when renderer receives BitstreamOpened
+  // message acknowledging an OpenBitstream request, and is set to false when
+  // the EVS client requests to close bitstream, or when renderer receives
+  // BitstreamClosed message from the browser procses.
+  bool bitstream_opened_;

[Ami GONE FROM CHROMIUM, 2013/06/18 20:56:27]

s/ed// since this is temporal (once closed, it is still true that the bitstream
_was_ opened, but it is no longer true that it _is_ open).

[hshi1, 2013/06/18 23:01:19]

Done.

+
   DISALLOW_COPY_AND_ASSIGN(VideoCaptureImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_VIDEO_CAPTURE_IMPL_H_