content/renderer/pepper/pepper_video_source_host.h

   1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_RENDERER_PEPPER_PEPPER_VIDEO_SOURCE_HOST_H_
   6 #define CONTENT_RENDERER_PEPPER_PEPPER_VIDEO_SOURCE_HOST_H_
   7
   8 #include "base/compiler_specific.h"
   9 #include "base/memory/ref_counted.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "base/memory/weak_ptr.h"
  12 #include "content/common/content_export.h"
  13 #include "content/renderer/media/video_source_handler.h"
  14 #include "ppapi/c/pp_time.h"
  15 #include "ppapi/host/host_message_context.h"
  16 #include "ppapi/host/resource_host.h"
  17
  18 struct PP_ImageDataDesc;
  19
  20 namespace content {
  21
  22 class RendererPpapiHost;
  23
  24 class CONTENT_EXPORT PepperVideoSourceHost : public ppapi::host::ResourceHost {
  25  public:
  26   PepperVideoSourceHost(RendererPpapiHost* host,
  27                         PP_Instance instance,
  28                         PP_Resource resource);
  29
  30   virtual ~PepperVideoSourceHost();
  31
  32   virtual int32_t OnResourceMessageReceived(
  33       const IPC::Message& msg,
  34       ppapi::host::HostMessageContext* context) OVERRIDE;
  35
  36  private:
  37   // This helper object receives frames on a video worker thread and passes
  38   // them on to us.
  39   class FrameReceiver : public FrameReaderInterface,
  40                         public base::RefCountedThreadSafe<FrameReceiver> {
  41    public:
  42     explicit FrameReceiver(const base::WeakPtr<PepperVideoSourceHost>& host);
  43
  44     // FrameReaderInterface implementation.
  45     virtual bool GotFrame(const scoped_refptr<media::VideoFrame>& frame)
  46         OVERRIDE;
  47
  48     void OnGotFrame(const scoped_refptr<media::VideoFrame>& frame);
  49
  50    private:
  51     friend class base::RefCountedThreadSafe<FrameReceiver>;
  52     virtual ~FrameReceiver();
  53
  54     base::WeakPtr<PepperVideoSourceHost> host_;
  55     scoped_refptr<base::MessageLoopProxy> main_message_loop_proxy_;
  56   };
  57
  58   friend class FrameReceiver;
  59
  60   int32_t OnHostMsgOpen(ppapi::host::HostMessageContext* context,
  61                         const std::string& stream_url);
  62   int32_t OnHostMsgGetFrame(ppapi::host::HostMessageContext* context);
  63   int32_t OnHostMsgClose(ppapi::host::HostMessageContext* context);
  64
  65   // Sends the reply to a GetFrame message from the plugin. A reply is always
  66   // sent and last_frame_, reply_context_, and get_frame_pending_ are all reset.
  67   void SendGetFrameReply();
  68   // Sends the reply to a GetFrame message from the plugin in case of an error.
  69   void SendGetFrameErrorReply(int32_t error);
  70
  71   void Close();
  72
  73   RendererPpapiHost* renderer_ppapi_host_;
  74
  75   ppapi::host::ReplyMessageContext reply_context_;
  76
  77   scoped_ptr<VideoSourceHandler> source_handler_;
  78   scoped_refptr<FrameReceiver> frame_receiver_;
  79   std::string stream_url_;
  80   scoped_refptr<media::VideoFrame> last_frame_;
  81   bool get_frame_pending_;
  82
  83   base::WeakPtrFactory<PepperVideoSourceHost> weak_factory_;
  84
  85   DISALLOW_COPY_AND_ASSIGN(PepperVideoSourceHost);
  86 };
  87
  88 }  // namespace content
  89
  90 #endif  // CONTENT_RENDERER_PEPPER_PEPPER_VIDEO_SOURCE_HOST_H_