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/plugin_resource.h"
+#include "ppapi/thunk/ppb_video_capture_api.h"
+
+namespace ppapi {
+namespace proxy {
+
+class VideoCaptureResource
+    : public PluginResource,
+      public ::ppapi::thunk::PPB_VideoCapture_API {
+ public:
+  VideoCaptureResource(Connection connection,
+                       PP_Instance instance,
+                       PluginDispatcher* dispatcher);
+  virtual ~VideoCaptureResource();
+
+  // PluginResource override.
+  virtual thunk::PPB_VideoCapture_API* AsPPB_VideoCapture_API() OVERRIDE {
+    return this;
+  }
+
+  // PPB_VideoCapture_API implementation.
+  virtual int32_t EnumerateDevices(
+      PP_Resource* devices,
+      scoped_refptr<TrackedCallback> callback) OVERRIDE;
+  virtual int32_t Open(const std::string& device_id,
+                       const PP_VideoCaptureDeviceInfo_Dev& requested_info,
+                       uint32_t buffer_count,
+                       scoped_refptr<TrackedCallback> callback) OVERRIDE;
+  virtual int32_t StartCapture() OVERRIDE;
+  virtual int32_t ReuseBuffer(uint32_t buffer) OVERRIDE;
+  virtual int32_t StopCapture() OVERRIDE;
+  virtual void Close() OVERRIDE;
+  virtual int32_t EnumerateDevicesSync(const PP_ArrayOutput& devices) OVERRIDE;
+
+ private:
+  enum OpenState {
+    BEFORE_OPEN,
+    OPENED,
+    CLOSED
+  };
+
+  // PluginResource overrides.
+  virtual void OnReplyReceived(const ResourceMessageReplyParams& params,
+                               const IPC::Message& msg) OVERRIDE;
+
+  void OnPluginMsgOnDeviceInfo(const ResourceMessageReplyParams& params,
+                               const struct PP_VideoCaptureDeviceInfo_Dev& info,
+                               const std::vector<HostResource>& buffers,
+                               uint32_t buffer_size);
+  void OnPluginMsgOnStatus(const ResourceMessageReplyParams& params,
+                           uint32_t status);
+  void OnPluginMsgOnError(const ResourceMessageReplyParams& params,
+                          uint32_t error);
+  void OnPluginMsgOnBufferReady(const ResourceMessageReplyParams& params,
+                                uint32_t buffer);
+
+  void OnPluginMsgOpenReply(const ResourceMessageReplyParams& params);
+  void OnPluginMsgEnumerateDevicesReply(
+      PP_Resource* devices_output,
+      scoped_refptr<TrackedCallback> callback,
+      const ResourceMessageReplyParams& params,
+      const std::vector<DeviceRefData>& devices);
+
+  void SetBufferInUse(uint32_t buffer_index);
+
+  // Points to the C interface of client implementation.
+  const PPP_VideoCapture_Dev* ppp_video_capture_impl_;
+
+  // Indicates that the i-th buffer is currently in use.
+  std::vector<bool> buffer_in_use_;
+
+  // Holds a reference of the callback so that Close() can cancel it.
+  scoped_refptr<TrackedCallback> open_callback_;
+  OpenState open_state_;
+
+  bool has_pending_enum_devices_callback_;
+
+  DISALLOW_COPY_AND_ASSIGN(VideoCaptureResource);
+};
+
+}  // namespace proxy
+}  // namespace ppapi
+
+#endif  // PPAPI_PROXY_VIDEO_CAPTURE_RESOURCE_H_