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.
5 #ifndef CONTENT_RENDERER_PEPPER_PEPPER_VIDEO_SOURCE_HOST_H_
6 #define CONTENT_RENDERER_PEPPER_PEPPER_VIDEO_SOURCE_HOST_H_
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/c/ppb_image_data.h"
16 #include "ppapi/host/host_message_context.h"
17 #include "ppapi/host/resource_host.h"
19 struct PP_ImageDataDesc;
23 class PPB_ImageData_Impl;
24 class RendererPpapiHost;
26 class CONTENT_EXPORT PepperVideoSourceHost : public ppapi::host::ResourceHost {
28 PepperVideoSourceHost(RendererPpapiHost* host,
30 PP_Resource resource);
32 virtual ~PepperVideoSourceHost();
34 virtual int32_t OnResourceMessageReceived(
35 const IPC::Message& msg,
36 ppapi::host::HostMessageContext* context) OVERRIDE;
39 // This helper object receives frames on a video worker thread and passes
41 class FrameReceiver : public FrameReaderInterface,
42 public base::RefCountedThreadSafe<FrameReceiver> {
44 explicit FrameReceiver(const base::WeakPtr<PepperVideoSourceHost>& host);
46 // FrameReaderInterface implementation.
47 virtual bool GotFrame(const scoped_refptr<media::VideoFrame>& frame)
50 void OnGotFrame(const scoped_refptr<media::VideoFrame>& frame);
53 friend class base::RefCountedThreadSafe<FrameReceiver>;
54 virtual ~FrameReceiver();
56 base::WeakPtr<PepperVideoSourceHost> host_;
57 scoped_refptr<base::MessageLoopProxy> main_message_loop_proxy_;
60 friend class FrameReceiver;
62 int32_t OnHostMsgOpen(ppapi::host::HostMessageContext* context,
63 const std::string& stream_url);
64 int32_t OnHostMsgGetFrame(ppapi::host::HostMessageContext* context);
65 int32_t OnHostMsgClose(ppapi::host::HostMessageContext* context);
67 // Sends the reply to a GetFrame message from the plugin. A reply is always
68 // sent and last_frame_, reply_context_, and get_frame_pending_ are all reset.
69 void SendGetFrameReply();
70 // Sends the reply to a GetFrame message from the plugin in case of an error.
71 void SendGetFrameErrorReply(int32_t error);
75 RendererPpapiHost* renderer_ppapi_host_;
77 ppapi::host::ReplyMessageContext reply_context_;
79 scoped_ptr<VideoSourceHandler> source_handler_;
80 scoped_refptr<FrameReceiver> frame_receiver_;
81 std::string stream_url_;
82 scoped_refptr<media::VideoFrame> last_frame_;
83 bool get_frame_pending_;
84 // We use only one ImageData resource in order to avoid allocating
85 // shared memory repeatedly. We send the same one each time the plugin
86 // requests a frame. For this to work, the plugin must finish using
87 // the ImageData it receives prior to calling GetFrame, and not access
88 // the ImageData until it gets its next callback to GetFrame.
89 scoped_refptr<PPB_ImageData_Impl> shared_image_;
90 PP_ImageDataDesc shared_image_desc_;
92 base::WeakPtrFactory<PepperVideoSourceHost> weak_factory_;
94 DISALLOW_COPY_AND_ASSIGN(PepperVideoSourceHost);
97 } // namespace content
99 #endif // CONTENT_RENDERER_PEPPER_PEPPER_VIDEO_SOURCE_HOST_H_