content/renderer/pepper/pepper_video_capture_host.h

   1 // Copyright (c) 2012 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_CAPTURE_HOST_H_
   6 #define CONTENT_RENDERER_PEPPER_PEPPER_VIDEO_CAPTURE_HOST_H_
   7
   8 #include "base/compiler_specific.h"
   9 #include "base/memory/ref_counted.h"
  10 #include "content/public/renderer/renderer_ppapi_host.h"
  11 #include "content/renderer/pepper/pepper_device_enumeration_host_helper.h"
  12 #include "media/video/capture/video_capture.h"
  13 #include "media/video/capture/video_capture_types.h"
  14 #include "ppapi/c/dev/ppp_video_capture_dev.h"
  15 #include "ppapi/host/host_message_context.h"
  16 #include "ppapi/host/resource_host.h"
  17 #include "webkit/plugins/ppapi/plugin_delegate.h"
  18 #include "webkit/plugins/ppapi/ppb_buffer_impl.h"
  19
  20 namespace content {
  21
  22 class PepperVideoCaptureHost
  23   : public ppapi::host::ResourceHost,
  24     public webkit::ppapi::PluginDelegate::PlatformVideoCaptureEventHandler,
  25     public PepperDeviceEnumerationHostHelper::Delegate {
  26  public:
  27   PepperVideoCaptureHost(RendererPpapiHost* host,
  28                          PP_Instance instance,
  29                          PP_Resource resource);
  30
  31   virtual ~PepperVideoCaptureHost();
  32
  33   bool Init();
  34
  35   virtual int32_t OnResourceMessageReceived(
  36       const IPC::Message& msg,
  37       ppapi::host::HostMessageContext* context) OVERRIDE;
  38
  39   // PluginDelegate::PlatformVideoCaptureEventHandler
  40   virtual void OnInitialized(media::VideoCapture* capture,
  41                              bool succeeded) OVERRIDE;
  42   virtual void OnStarted(media::VideoCapture* capture) OVERRIDE;
  43   virtual void OnStopped(media::VideoCapture* capture) OVERRIDE;
  44   virtual void OnPaused(media::VideoCapture* capture) OVERRIDE;
  45   virtual void OnError(media::VideoCapture* capture, int error_code) OVERRIDE;
  46   virtual void OnRemoved(media::VideoCapture* capture) OVERRIDE;
  47   virtual void OnBufferReady(
  48       media::VideoCapture* capture,
  49       scoped_refptr<media::VideoCapture::VideoFrameBuffer> buffer) OVERRIDE;
  50   virtual void OnDeviceInfoReceived(
  51       media::VideoCapture* capture,
  52       const media::VideoCaptureParams& device_info) OVERRIDE;
  53
  54   // PepperDeviceEnumerationHostHelper::Delegate implementation.
  55   virtual webkit::ppapi::PluginDelegate* GetPluginDelegate() OVERRIDE;
  56
  57  private:
  58   int32_t OnOpen(ppapi::host::HostMessageContext* context,
  59                  const std::string& device_id,
  60                  const PP_VideoCaptureDeviceInfo_Dev& requested_info,
  61                  uint32_t buffer_count);
  62   int32_t OnStartCapture(ppapi::host::HostMessageContext* context);
  63   int32_t OnReuseBuffer(ppapi::host::HostMessageContext* context,
  64                         uint32_t buffer);
  65   int32_t OnStopCapture(ppapi::host::HostMessageContext* context);
  66   int32_t OnClose(ppapi::host::HostMessageContext* context);
  67
  68   int32_t StopCapture();
  69   int32_t Close();
  70   void ReleaseBuffers();
  71   void SendStatus();
  72
  73   void SetRequestedInfo(const PP_VideoCaptureDeviceInfo_Dev& device_info,
  74                         uint32_t buffer_count);
  75
  76   void DetachPlatformVideoCapture();
  77
  78   bool SetStatus(PP_VideoCaptureStatus_Dev status, bool forced);
  79
  80   scoped_refptr<webkit::ppapi::PluginDelegate::PlatformVideoCapture>
  81       platform_video_capture_;
  82
  83   // Buffers of video frame.
  84   struct BufferInfo {
  85     BufferInfo();
  86     ~BufferInfo();
  87
  88     bool in_use;
  89     void* data;
  90     scoped_refptr<webkit::ppapi::PPB_Buffer_Impl> buffer;
  91   };
  92
  93   RendererPpapiHost* renderer_ppapi_host_;
  94
  95   std::vector<BufferInfo> buffers_;
  96   size_t buffer_count_hint_;
  97
  98   media::VideoCaptureCapability capability_;
  99
 100   PP_VideoCaptureStatus_Dev status_;
 101
 102   ppapi::host::ReplyMessageContext open_reply_context_;
 103
 104   PepperDeviceEnumerationHostHelper enumeration_helper_;
 105
 106   DISALLOW_COPY_AND_ASSIGN(PepperVideoCaptureHost);
 107 };
 108
 109 }  // namespace content
 110
 111 #endif  // CONTENT_RENDERER_PEPPER_PEPPER_VIDEO_CAPTURE_HOST_H_