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 "base/threading/thread_checker.h"
13 #include "content/common/content_export.h"
14 #include "content/renderer/media/video_source_handler.h"
15 #include "ppapi/c/pp_time.h"
16 #include "ppapi/c/ppb_image_data.h"
17 #include "ppapi/host/host_message_context.h"
18 #include "ppapi/host/resource_host.h"
20 struct PP_ImageDataDesc;
24 class PPB_ImageData_Impl;
25 class RendererPpapiHost;
27 class CONTENT_EXPORT PepperVideoSourceHost : public ppapi::host::ResourceHost {
29 PepperVideoSourceHost(RendererPpapiHost* host,
31 PP_Resource resource);
33 ~PepperVideoSourceHost() override;
35 int32_t OnResourceMessageReceived(
36 const IPC::Message& msg,
37 ppapi::host::HostMessageContext* context) override;
40 // This helper object receives frames on a video worker thread and passes
42 class FrameReceiver : public FrameReaderInterface,
43 public base::RefCountedThreadSafe<FrameReceiver> {
45 explicit FrameReceiver(const base::WeakPtr<PepperVideoSourceHost>& host);
47 // FrameReaderInterface implementation.
48 void GotFrame(const scoped_refptr<media::VideoFrame>& frame) override;
51 friend class base::RefCountedThreadSafe<FrameReceiver>;
52 ~FrameReceiver() override;
54 base::WeakPtr<PepperVideoSourceHost> host_;
55 // |thread_checker_| is bound to the main render thread.
56 base::ThreadChecker thread_checker_;
59 friend class FrameReceiver;
61 int32_t OnHostMsgOpen(ppapi::host::HostMessageContext* context,
62 const std::string& stream_url);
63 int32_t OnHostMsgGetFrame(ppapi::host::HostMessageContext* context);
64 int32_t OnHostMsgClose(ppapi::host::HostMessageContext* context);
66 // Sends the reply to a GetFrame message from the plugin. A reply is always
67 // sent and last_frame_, reply_context_, and get_frame_pending_ are all reset.
68 void SendGetFrameReply();
69 // Sends the reply to a GetFrame message from the plugin in case of an error.
70 void SendGetFrameErrorReply(int32_t error);
74 RendererPpapiHost* renderer_ppapi_host_;
76 ppapi::host::ReplyMessageContext reply_context_;
78 scoped_ptr<VideoSourceHandler> source_handler_;
79 scoped_refptr<FrameReceiver> frame_receiver_;
80 std::string stream_url_;
81 scoped_refptr<media::VideoFrame> last_frame_;
82 bool get_frame_pending_;
83 // We use only one ImageData resource in order to avoid allocating
84 // shared memory repeatedly. We send the same one each time the plugin
85 // requests a frame. For this to work, the plugin must finish using
86 // the ImageData it receives prior to calling GetFrame, and not access
87 // the ImageData until it gets its next callback to GetFrame.
88 scoped_refptr<PPB_ImageData_Impl> shared_image_;
89 PP_ImageDataDesc shared_image_desc_;
91 base::WeakPtrFactory<PepperVideoSourceHost> weak_factory_;
93 DISALLOW_COPY_AND_ASSIGN(PepperVideoSourceHost);
96 } // namespace content
98 #endif // CONTENT_RENDERER_PEPPER_PEPPER_VIDEO_SOURCE_HOST_H_