Add chrome.usb.listInterfaces API

chrome/browser/usb/usb_interface.cc

Index: chrome/browser/usb/usb_interface.cc
diff --git a/chrome/browser/usb/usb_interface.cc b/chrome/browser/usb/usb_interface.cc
new file mode 100644
index 0000000000000000000000000000000000000000..efbe30de363cf63dfa0ed2b62419e798a288ae9b
--- /dev/null
+++ b/chrome/browser/usb/usb_interface.cc
@@ -0,0 +1,161 @@
+// 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.
+
+#include "chrome/browser/usb/usb_interface.h"
+
+#include "base/logging.h"
+#include "third_party/libusb/src/libusb/libusb.h"
+
+UsbEndpointDescriptor::UsbEndpointDescriptor(
+    scoped_refptr<const UsbConfigDescriptor> config,
+    PlatformUsbEndpointDescriptor descriptor)
+    : config_(config), descriptor_(descriptor) {
+}
+
+UsbEndpointDescriptor::~UsbEndpointDescriptor() {}
+
+int UsbEndpointDescriptor::GetAddress() const {
+  return descriptor_->bEndpointAddress & LIBUSB_ENDPOINT_ADDRESS_MASK;
+}
+
+UsbEndpointDirection UsbEndpointDescriptor::GetDirection() const {
+  switch (descriptor_->bEndpointAddress & LIBUSB_ENDPOINT_DIR_MASK) {
+    case LIBUSB_ENDPOINT_IN:
+      return USB_DIRECTION_INBOUND;
+    case LIBUSB_ENDPOINT_OUT:
+      return USB_DIRECTION_OUTBOUND;
+    default:
+      NOTREACHED();
+      return USB_DIRECTION_INBOUND;
+  }
+}
+
+int UsbEndpointDescriptor::GetMaximumPacketSize() const {
+  return descriptor_->wMaxPacketSize;
+}
+
+UsbSynchronizationType UsbEndpointDescriptor::GetSynchronizationType() const {
+  switch (descriptor_->bmAttributes & LIBUSB_ISO_SYNC_TYPE_MASK) {
+    case LIBUSB_ISO_SYNC_TYPE_NONE:
+      return USB_SYNCHRONIZATION_NONE;
+    case LIBUSB_ISO_SYNC_TYPE_ASYNC:
+      return USB_SYNCHRONIZATION_ASYNCHRONOUS;
+    case LIBUSB_ISO_SYNC_TYPE_ADAPTIVE:
+      return USB_SYNCHRONIZATION_ADAPTIVE;
+    case LIBUSB_ISO_SYNC_TYPE_SYNC:
+      return USB_SYNCHRONIZATION_SYNCHRONOUS;
+    default:
+      NOTREACHED();
+      return USB_SYNCHRONIZATION_NONE;
+  }
+}
+
+UsbTransferType UsbEndpointDescriptor::GetTransferType() const {
+  switch (descriptor_->bmAttributes & LIBUSB_TRANSFER_TYPE_MASK) {
+    case LIBUSB_TRANSFER_TYPE_CONTROL:
+      return USB_TRANSFER_CONTROL;
+    case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS:
+      return USB_TRANSFER_ISOCHRONOUS;
+    case LIBUSB_TRANSFER_TYPE_BULK:
+      return USB_TRANSFER_BULK;
+    case LIBUSB_TRANSFER_TYPE_INTERRUPT:
+      return USB_TRANSFER_INTERRUPT;
+    default:
+      NOTREACHED();
+      return USB_TRANSFER_CONTROL;
+  }
+}
+
+UsbUsageType UsbEndpointDescriptor::GetUsageType() const {
+  switch (descriptor_->bmAttributes & LIBUSB_ISO_USAGE_TYPE_MASK) {
+    case LIBUSB_ISO_USAGE_TYPE_DATA:
+      return USB_USAGE_DATA;
+    case LIBUSB_ISO_USAGE_TYPE_FEEDBACK:
+      return USB_USAGE_FEEDBACK;
+    case LIBUSB_ISO_USAGE_TYPE_IMPLICIT:
+      return USB_USAGE_EXPLICIT_FEEDBACK;
+    default:
+      NOTREACHED();
+      return USB_USAGE_DATA;
+  }
+}
+
+int UsbEndpointDescriptor::GetPollingInterval() const {
+  return descriptor_->bInterval;
+}
+
+UsbInterfaceDescriptor::UsbInterfaceDescriptor(
+    scoped_refptr<const UsbConfigDescriptor> config,
+    PlatformUsbInterfaceDescriptor descriptor)
+    : config_(config), descriptor_(descriptor) {
+}
+
+UsbInterfaceDescriptor::~UsbInterfaceDescriptor() {}
+
+size_t UsbInterfaceDescriptor::GetNumEndpoints() const {
+  return descriptor_->bNumEndpoints;
+}
+
+scoped_refptr<const UsbEndpointDescriptor>
+    UsbInterfaceDescriptor::GetEndpoint(size_t index) const {
+  return make_scoped_refptr(new UsbEndpointDescriptor(config_,
+      &descriptor_->endpoint[index]));
+}
+
+int UsbInterfaceDescriptor::GetInterfaceNumber() const {
+  return descriptor_->bInterfaceNumber;
+}
+
+int UsbInterfaceDescriptor::GetAlternateSetting() const {
+  return descriptor_->bAlternateSetting;
+}
+
+int UsbInterfaceDescriptor::GetInterfaceClass() const {
+  return descriptor_->bInterfaceClass;
+}
+
+int UsbInterfaceDescriptor::GetInterfaceSubclass() const {
+  return descriptor_->bInterfaceSubClass;
+}
+
+int UsbInterfaceDescriptor::GetInterfaceProtocol() const {
+  return descriptor_->bInterfaceProtocol;
+}
+
+UsbInterface::UsbInterface(scoped_refptr<const UsbConfigDescriptor> config,
+    PlatformUsbInterface usbInterface)
+    : config_(config), interface_(usbInterface) {
+}
+
+UsbInterface::~UsbInterface() {}
+
+size_t UsbInterface::GetNumAltSettings() const {
+  return interface_->num_altsetting;
+}
+
+scoped_refptr<const UsbInterfaceDescriptor>
+    UsbInterface::GetAltSetting(size_t index) const {
+  return make_scoped_refptr(new UsbInterfaceDescriptor(config_,
+      &interface_->altsetting[index]));
+}
+
+UsbConfigDescriptor::UsbConfigDescriptor()
+    : config_(NULL) {
+}
+
+UsbConfigDescriptor::~UsbConfigDescriptor() {}

[Kenny Root (Google), 2013/05/08 02:29:34]

This needs libusb_free_config_descriptor, but it seems like a layering problem
if it's freed here.

[Bei Zhang, 2013/05/14 20:55:47]

I think this is the right place.

On 2013/05/08 02:29:34, Kenny Root (Google) wrote:

+
+void UsbConfigDescriptor::Reset(PlatformUsbConfigDescriptor config) {
+  config_ = config;
+}
+
+size_t UsbConfigDescriptor::GetNumInterfaces() const {
+  return config_->bNumInterfaces;
+}
+
+scoped_refptr<const UsbInterface>
+    UsbConfigDescriptor::GetInterface(size_t index) const {
+  return make_scoped_refptr(new UsbInterface(make_scoped_refptr(this),
+          &config_->interface[index]));
+}