Refactor video capture to new design

ppapi/proxy/video_capture_resource.h

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PPAPI_PROXY_VIDEO_CAPTURE_RESOURCE_H_
+#define PPAPI_PROXY_VIDEO_CAPTURE_RESOURCE_H_
+
+#include "base/compiler_specific.h"
+#include "ppapi/c/dev/ppp_video_capture_dev.h"
+#include "ppapi/proxy/ppapi_proxy_export.h"
+#include "ppapi/proxy/plugin_resource.h"
+#include "ppapi/shared_impl/api_id.h"
+#include "ppapi/thunk/ppb_video_capture_api.h"
+
+namespace ppapi {
+namespace proxy {
+
+class PPAPI_PROXY_EXPORT VideoCaptureResource
+    : public PluginResource,
+      public NON_EXPORTED_BASE(::ppapi::thunk::PPB_VideoCapture_API) {
+ public:
+  VideoCaptureResource(Connection connection, PP_Instance instance,
+                       PluginDispatcher* dispatcher);
+  ~VideoCaptureResource();
+
+  void OnReplyReceived(const ResourceMessageReplyParams& params,
+                       const IPC::Message& msg) OVERRIDE;
+
+  thunk::PPB_VideoCapture_API* AsPPB_VideoCapture_API() OVERRIDE {
+    return this;
+  }
+
+  // PPB_VideoCapture_API
+  int32_t EnumerateDevices(PP_Resource* devices,
+                           scoped_refptr<TrackedCallback> callback) OVERRIDE;
+  int32_t Open(const std::string& device_id,
+               const PP_VideoCaptureDeviceInfo_Dev& requested_info,
+               uint32_t buffer_count,
+               scoped_refptr<TrackedCallback> callback) OVERRIDE;
+  int32_t StartCapture() OVERRIDE;
+  int32_t ReuseBuffer(uint32_t buffer) OVERRIDE;
+  int32_t StopCapture() OVERRIDE;
+  void Close() OVERRIDE;
+  const std::vector<DeviceRefData>& GetDeviceRefData() const OVERRIDE {
+    return devices_data_;
+  }
+
+ private:
+  enum OpenState {
+    BEFORE_OPEN,
+    OPENED,
+    CLOSED
+  };
+
+  void OnDeviceInfo(const ResourceMessageReplyParams& params,
+                    const struct PP_VideoCaptureDeviceInfo_Dev& info,
+                    const std::vector<HostResource>& buffers,
+                    uint32_t buffer_size);
+  void OnStatus(const ResourceMessageReplyParams& params,
+                uint32_t status);
+  void OnError(const ResourceMessageReplyParams& params,
+               uint32_t error);
+  void OnBufferReady(const ResourceMessageReplyParams& params,
+                     uint32_t buffer);
+
+  void OnOpenComplete(const ResourceMessageReplyParams& params);
+  void OnEnumerateDevicesComplete(const ResourceMessageReplyParams& params,
+                                  const std::vector<DeviceRefData>& devices);
+
+  void SetBufferInUse(uint32_t buffer_index);
+
+  // Points to the client implementation of pp::VideoCaptureClient_Dev.
+  const PPP_VideoCapture_Dev* ppp_video_capture_impl_;
+
+  // Indicates that the i-th buffer is currently in use.
+  std::vector<bool> buffer_in_use_;
+
+  scoped_refptr<TrackedCallback> open_callback_;
+
+  // Saves the output of EnumerateDevices().
+  std::vector<DeviceRefData> devices_data_;
+
+  // Output parameter of EnumerateDevices(). It should not be accessed after
+  // |enumerate_devices_callback_| is run.
+  PP_Resource* devices_;
+
+  OpenState open_state_;
+
+  scoped_refptr<TrackedCallback> enumerate_devices_callback_;
+};
+
+}  // namespace proxy
+}  // namespace ppapi
+
+#endif  // PPAPI_PROXY_VIDEO_CAPTURE_RESOURCE_H_