Glue code to connect PPAPI proxy to MediaStream sources and destinations.

content/renderer/pepper/pepper_video_source_host.h

 // Copyright (c) 2013 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_RENDERER_PEPPER_PEPPER_VIDEO_SOURCE_HOST_H_
 #define CONTENT_RENDERER_PEPPER_PEPPER_VIDEO_SOURCE_HOST_H_
 
 #include "base/compiler_specific.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "content/common/content_export.h"
+#include "content/renderer/media/video_source_handler.h"
 #include "ppapi/c/pp_time.h"
+#include "ppapi/host/host_message_context.h"
 #include "ppapi/host/resource_host.h"
 
 namespace content {
 
 class RendererPpapiHost;
 
-class CONTENT_EXPORT PepperVideoSourceHost : public ppapi::host::ResourceHost {
+class CONTENT_EXPORT PepperVideoSourceHost
+    : public ppapi::host::ResourceHost,
+      public content::FrameReaderInterface {
  public:
   PepperVideoSourceHost(RendererPpapiHost* host,
                         PP_Instance instance,
                         PP_Resource resource);
 
   virtual ~PepperVideoSourceHost();
 
+  // content::FrameReaderInterface implementation.
+  virtual bool GotFrame(cricket::VideoFrame* frame) OVERRIDE;
+
   virtual int32_t OnResourceMessageReceived(
       const IPC::Message& msg,
       ppapi::host::HostMessageContext* context) OVERRIDE;
 
  private:
+  int32_t ConvertFrame(ppapi::HostResource* image_data_resource,
+                       PP_TimeTicks* timestamp);
+  void SendFrame(const ppapi::HostResource& image_data_resource,
+                 PP_TimeTicks timestamp,
+                 int32_t result);
+
   int32_t OnHostMsgOpen(ppapi::host::HostMessageContext* context,
                         const std::string& stream_url);
   int32_t OnHostMsgGetFrame(ppapi::host::HostMessageContext* context);
   int32_t OnHostMsgClose(ppapi::host::HostMessageContext* context);
 
   RendererPpapiHost* renderer_ppapi_host_;
+  ppapi::host::ReplyMessageContext reply_context_;
 
   base::WeakPtrFactory<PepperVideoSourceHost> weak_factory_;
 
-  PP_TimeTicks last_timestamp_;
+  scoped_ptr<content::VideoSourceHandler> source_handler_;
+  std::string stream_url_;
+  scoped_ptr<cricket::VideoFrame> last_frame_;
+  base::Lock lock_;

[yzshen1, 2013/05/06 16:47:28]

I agree with the comment that we should use PostTask instead of Lock if
possible. If we finally decide to use Lock, please comment on what members are
protected by this lock, and if some members are not protected, which thread can
access them.

[bbudge, 2013/05/06 19:27:50]

Done. Used a task.

+  bool get_frame_pending_;
 
   DISALLOW_COPY_AND_ASSIGN(PepperVideoSourceHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_PEPPER_PEPPER_VIDEO_SOURCE_HOST_H_