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      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 "content/renderer/pepper/ppb_buffer_impl.h"
     13 #include "media/video/capture/video_capture.h"
     14 #include "media/video/capture/video_capture_types.h"
     15 #include "ppapi/c/dev/ppp_video_capture_dev.h"
     16 #include "ppapi/host/host_message_context.h"
     17 #include "ppapi/host/resource_host.h"
     18 
     19 namespace content {
     20 class PepperPlatformVideoCapture;
     21 class RendererPpapiHostImpl;
     22 
     23 class PepperVideoCaptureHost
     24   : public ppapi::host::ResourceHost,
     25     public media::VideoCapture::EventHandler {
     26  public:
     27   PepperVideoCaptureHost(RendererPpapiHostImpl* 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   void OnInitialized(media::VideoCapture* capture, bool succeeded);
     40 
     41   // media::VideoCapture::EventHandler
     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  private:
     55   int32_t OnOpen(ppapi::host::HostMessageContext* context,
     56                  const std::string& device_id,
     57                  const PP_VideoCaptureDeviceInfo_Dev& requested_info,
     58                  uint32_t buffer_count);
     59   int32_t OnStartCapture(ppapi::host::HostMessageContext* context);
     60   int32_t OnReuseBuffer(ppapi::host::HostMessageContext* context,
     61                         uint32_t buffer);
     62   int32_t OnStopCapture(ppapi::host::HostMessageContext* context);
     63   int32_t OnClose(ppapi::host::HostMessageContext* context);
     64 
     65   int32_t StopCapture();
     66   int32_t Close();
     67   void ReleaseBuffers();
     68   void SendStatus();
     69 
     70   void SetRequestedInfo(const PP_VideoCaptureDeviceInfo_Dev& device_info,
     71                         uint32_t buffer_count);
     72 
     73   void DetachPlatformVideoCapture();
     74 
     75   bool SetStatus(PP_VideoCaptureStatus_Dev status, bool forced);
     76 
     77   scoped_refptr<PepperPlatformVideoCapture> platform_video_capture_;
     78 
     79   // Buffers of video frame.
     80   struct BufferInfo {
     81     BufferInfo();
     82     ~BufferInfo();
     83 
     84     bool in_use;
     85     void* data;
     86     scoped_refptr<PPB_Buffer_Impl> buffer;
     87   };
     88 
     89   RendererPpapiHostImpl* renderer_ppapi_host_;
     90 
     91   std::vector<BufferInfo> buffers_;
     92   size_t buffer_count_hint_;
     93 
     94   media::VideoCaptureCapability capability_;
     95 
     96   PP_VideoCaptureStatus_Dev status_;
     97 
     98   ppapi::host::ReplyMessageContext open_reply_context_;
     99 
    100   PepperDeviceEnumerationHostHelper enumeration_helper_;
    101 
    102   DISALLOW_COPY_AND_ASSIGN(PepperVideoCaptureHost);
    103 };
    104 
    105 }  // namespace content
    106 
    107 #endif  // CONTENT_RENDERER_PEPPER_PEPPER_VIDEO_CAPTURE_HOST_H_
    108