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 "base/memory/scoped_ptr.h"
  11 #include "content/common/media/video_capture.h"
  12 #include "content/public/renderer/renderer_ppapi_host.h"
  13 #include "content/renderer/pepper/pepper_device_enumeration_host_helper.h"
  14 #include "content/renderer/pepper/ppb_buffer_impl.h"
  15 #include "media/base/video_capture_types.h"
  16 #include "ppapi/c/dev/ppp_video_capture_dev.h"
  17 #include "ppapi/host/host_message_context.h"
  18 #include "ppapi/host/resource_host.h"
  19
  20 namespace media {
  21 class VideoFrame;
  22 }  // namespace media
  23
  24 namespace content {
  25 class PepperPlatformVideoCapture;
  26 class RendererPpapiHostImpl;
  27
  28 class PepperVideoCaptureHost : public ppapi::host::ResourceHost {
  29  public:
  30   PepperVideoCaptureHost(RendererPpapiHostImpl* host,
  31                          PP_Instance instance,
  32                          PP_Resource resource);
  33
  34   ~PepperVideoCaptureHost() override;
  35
  36   bool Init();
  37
  38   int32_t OnResourceMessageReceived(
  39       const IPC::Message& msg,
  40       ppapi::host::HostMessageContext* context) override;
  41
  42   // These methods are called by PepperPlatformVideoCapture only.
  43
  44   // Called when video capture is initialized. We can start
  45   // video capture if |succeeded| is true.
  46   void OnInitialized(bool succeeded);
  47
  48   // Called when video capture has started successfully.
  49   void OnStarted();
  50
  51   // Called when video capture has stopped. There will be no more
  52   // frames delivered.
  53   void OnStopped();
  54
  55   // Called when video capture has paused.
  56   void OnPaused();
  57
  58   // Called when video capture cannot be started because of an error.
  59   void OnError();
  60
  61   // Called when a video frame is ready.
  62   void OnFrameReady(const scoped_refptr<media::VideoFrame>& frame);
  63
  64  private:
  65   int32_t OnOpen(ppapi::host::HostMessageContext* context,
  66                  const std::string& device_id,
  67                  const PP_VideoCaptureDeviceInfo_Dev& requested_info,
  68                  uint32_t buffer_count);
  69   int32_t OnStartCapture(ppapi::host::HostMessageContext* context);
  70   int32_t OnReuseBuffer(ppapi::host::HostMessageContext* context,
  71                         uint32_t buffer);
  72   int32_t OnStopCapture(ppapi::host::HostMessageContext* context);
  73   int32_t OnClose(ppapi::host::HostMessageContext* context);
  74
  75   int32_t StopCapture();
  76   int32_t Close();
  77   void PostErrorReply();
  78   void AllocBuffers(const gfx::Size& resolution, int frame_rate);
  79   void ReleaseBuffers();
  80   void SendStatus();
  81
  82   void SetRequestedInfo(const PP_VideoCaptureDeviceInfo_Dev& device_info,
  83                         uint32_t buffer_count);
  84
  85   void DetachPlatformVideoCapture();
  86
  87   bool SetStatus(PP_VideoCaptureStatus_Dev status, bool forced);
  88
  89   scoped_ptr<PepperPlatformVideoCapture> platform_video_capture_;
  90
  91   // Buffers of video frame.
  92   struct BufferInfo {
  93     BufferInfo();
  94     ~BufferInfo();
  95
  96     bool in_use;
  97     void* data;
  98     scoped_refptr<PPB_Buffer_Impl> buffer;
  99   };
 100
 101   RendererPpapiHostImpl* renderer_ppapi_host_;
 102
 103   gfx::Size alloc_size_;
 104   std::vector<BufferInfo> buffers_;
 105   size_t buffer_count_hint_;
 106
 107   media::VideoCaptureParams video_capture_params_;
 108
 109   PP_VideoCaptureStatus_Dev status_;
 110
 111   ppapi::host::ReplyMessageContext open_reply_context_;
 112
 113   PepperDeviceEnumerationHostHelper enumeration_helper_;
 114
 115   DISALLOW_COPY_AND_ASSIGN(PepperVideoCaptureHost);
 116 };
 117
 118 }  // namespace content
 119
 120 #endif  // CONTENT_RENDERER_PEPPER_PEPPER_VIDEO_CAPTURE_HOST_H_