Extracted UsbConfigDescriptor, UsbInterfaceDescriptor and helper classes

components/usb_service/usb_interface_impl.h

+// Copyright 2014 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 COMPONENTS_USB_SERVICE_USB_INTERFACE_IMPL_H_
+#define COMPONENTS_USB_SERVICE_USB_INTERFACE_IMPL_H_
+
+#include "base/memory/ref_counted.h"
+#include "components/usb_service/usb_interface.h"
+#include "components/usb_service/usb_service_export.h"
+
+struct libusb_config_descriptor;
+struct libusb_endpoint_descriptor;
+struct libusb_interface;
+struct libusb_interface_descriptor;
+
+namespace usb_service {
+
+typedef libusb_config_descriptor* PlatformUsbConfigDescriptor;
+typedef const libusb_endpoint_descriptor* PlatformUsbEndpointDescriptor;
+typedef const libusb_interface* PlatformUsbInterface;
+typedef const libusb_interface_descriptor* PlatformUsbInterfaceDescriptor;
+
+class UsbConfigDescriptorImpl;
+class UsbInterfaceAltSettingDescriptor;
+
+class UsbEndpointDescriptorImpl : public UsbEndpointDescriptor {
+ public:
+  virtual int GetAddress() const OVERRIDE;
+  virtual UsbEndpointDirection GetDirection() const OVERRIDE;
+  virtual int GetMaximumPacketSize() const OVERRIDE;
+  virtual UsbSynchronizationType GetSynchronizationType() const OVERRIDE;
+  virtual UsbTransferType GetTransferType() const OVERRIDE;
+  virtual UsbUsageType GetUsageType() const OVERRIDE;
+  virtual int GetPollingInterval() const OVERRIDE;
+
+ private:
+  friend class base::RefCounted<const UsbEndpointDescriptorImpl>;
+  friend class UsbInterfaceAltSettingDescriptorImpl;
+
+  UsbEndpointDescriptorImpl(scoped_refptr<const UsbConfigDescriptor> config,
+                        PlatformUsbEndpointDescriptor descriptor);
+  virtual ~UsbEndpointDescriptorImpl();
+
+  scoped_refptr<const UsbConfigDescriptor> config_;
+  PlatformUsbEndpointDescriptor descriptor_;
+
+  DISALLOW_COPY_AND_ASSIGN(UsbEndpointDescriptorImpl);
+};
+
+class UsbInterfaceAltSettingDescriptorImpl
+    : public UsbInterfaceAltSettingDescriptor {
+ public:
+  virtual size_t GetNumEndpoints() const OVERRIDE;
+  virtual scoped_refptr<const UsbEndpointDescriptor> GetEndpoint(
+      size_t index) const OVERRIDE;
+
+  virtual int GetInterfaceNumber() const OVERRIDE;
+  virtual int GetAlternateSetting() const OVERRIDE;
+  virtual int GetInterfaceClass() const OVERRIDE;
+  virtual int GetInterfaceSubclass() const OVERRIDE;
+  virtual int GetInterfaceProtocol() const OVERRIDE;
+
+ private:
+  friend class UsbInterfaceDescriptorImpl;
+
+  UsbInterfaceAltSettingDescriptorImpl(
+      scoped_refptr<const UsbConfigDescriptor> config,
+      PlatformUsbInterfaceDescriptor descriptor);
+  virtual ~UsbInterfaceAltSettingDescriptorImpl();
+
+  scoped_refptr<const UsbConfigDescriptor> config_;
+  PlatformUsbInterfaceDescriptor descriptor_;
+
+  DISALLOW_COPY_AND_ASSIGN(UsbInterfaceAltSettingDescriptorImpl);
+};
+
+class UsbInterfaceDescriptorImpl : public UsbInterfaceDescriptor {
+ public:
+  virtual size_t GetNumAltSettings() const OVERRIDE;
+  virtual scoped_refptr<const UsbInterfaceAltSettingDescriptor> GetAltSetting(
+      size_t index) const OVERRIDE;
+
+ private:
+  friend class base::RefCounted<const UsbInterfaceDescriptorImpl>;
+  friend class UsbConfigDescriptorImpl;
+
+  UsbInterfaceDescriptorImpl(scoped_refptr<const UsbConfigDescriptor> config,
+                             PlatformUsbInterface usbInterface);
+  virtual ~UsbInterfaceDescriptorImpl();
+
+  scoped_refptr<const UsbConfigDescriptor> config_;
+  PlatformUsbInterface interface_;
+
+  DISALLOW_COPY_AND_ASSIGN(UsbInterfaceDescriptorImpl);
+};
+
+class UsbConfigDescriptorImpl : public UsbConfigDescriptor {
+ public:
+  virtual size_t GetNumInterfaces() const OVERRIDE;
+  virtual scoped_refptr<const UsbInterfaceDescriptor> GetInterface(
+      size_t index) const OVERRIDE;
+
+ private:
+  friend class base::RefCounted<UsbConfigDescriptor>;
+  friend class UsbDeviceImpl;
+
+  explicit UsbConfigDescriptorImpl(PlatformUsbConfigDescriptor config);
+  virtual ~UsbConfigDescriptorImpl();
+
+  PlatformUsbConfigDescriptor config_;
+
+  DISALLOW_COPY_AND_ASSIGN(UsbConfigDescriptorImpl);
+};
+
+}  // namespace usb_service;
+
+#endif  // COMPONENTS_USB_SERVICE_USB_INTERFACE_IMPL_H_