Move talk/media to webrtc/media

talk/media/devices/linuxdeviceinfo.cc

-/*
- * libjingle
- * Copyright 2012 Google Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- *  1. Redistributions of source code must retain the above copyright notice,
- *     this list of conditions and the following disclaimer.
- *  2. Redistributions in binary form must reproduce the above copyright notice,
- *     this list of conditions and the following disclaimer in the documentation
- *     and/or other materials provided with the distribution.
- *  3. The name of the author may not be used to endorse or promote products
- *     derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
- * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
- * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
- * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "talk/media/devices/deviceinfo.h"
-
-#include "talk/media/devices/libudevsymboltable.h"
-#include "webrtc/base/common.h"  // for ASSERT
-
-namespace cricket {
-
-class ScopedLibUdev {
- public:
-  static ScopedLibUdev* Create() {
-    ScopedLibUdev* ret_val = new ScopedLibUdev();
-    if (!ret_val->Init()) {
-      delete ret_val;
-      return NULL;
-    }
-    return ret_val;
-  }
-  ~ScopedLibUdev() {
-    libudev_.Unload();
-  }
-
-  LibUDevSymbolTable* instance() { return &libudev_; }
-
- private:
-  ScopedLibUdev() {}
-
-  bool Init() {
-    return libudev_.Load() &&
-           !IsWrongLibUDevAbiVersion(libudev_.GetDllHandle());
-  }
-
-  LibUDevSymbolTable libudev_;
-};
-
-class ScopedUdev {
- public:
-  explicit ScopedUdev(LibUDevSymbolTable* libudev) : libudev_(libudev) {
-    udev_ = libudev_->udev_new()();
-  }
-  ~ScopedUdev() {
-    if (udev_) libudev_->udev_unref()(udev_);
-  }
-
-  udev* instance() { return udev_; }
-
- private:
-  LibUDevSymbolTable* libudev_;
-  udev* udev_;
-};
-
-class ScopedUdevEnumerate {
- public:
-  ScopedUdevEnumerate(LibUDevSymbolTable* libudev, udev* udev)
-      : libudev_(libudev) {
-    enumerate_ = libudev_->udev_enumerate_new()(udev);
-  }
-  ~ScopedUdevEnumerate() {
-    if (enumerate_) libudev_->udev_enumerate_unref()(enumerate_);
-  }
-
-  udev_enumerate* instance() { return enumerate_; }
-
- private:
-  LibUDevSymbolTable* libudev_;
-  udev_enumerate* enumerate_;
-};
-
-bool GetUsbProperty(const Device& device, const char* property_name,
-                    std::string* property) {
-  rtc::scoped_ptr<ScopedLibUdev> libudev_context(ScopedLibUdev::Create());
-  if (!libudev_context) {
-    return false;
-  }
-  ScopedUdev udev_context(libudev_context->instance());
-  if (!udev_context.instance()) {
-    return false;
-  }
-  ScopedUdevEnumerate enumerate_context(libudev_context->instance(),
-                                        udev_context.instance());
-  if (!enumerate_context.instance()) {
-    return false;
-  }
-  libudev_context->instance()->udev_enumerate_add_match_subsystem()(
-      enumerate_context.instance(), "video4linux");
-  libudev_context->instance()->udev_enumerate_scan_devices()(
-      enumerate_context.instance());
-  udev_list_entry* devices =
-      libudev_context->instance()->udev_enumerate_get_list_entry()(
-          enumerate_context.instance());
-  if (!devices) {
-    return false;
-  }
-  udev_list_entry* dev_list_entry = NULL;
-  const char* property_value = NULL;
-  // Macro that expands to a for-loop over the devices.
-  for (dev_list_entry = devices; dev_list_entry != NULL;
-       dev_list_entry = libudev_context->instance()->
-           udev_list_entry_get_next()(dev_list_entry)) {
-    const char* path = libudev_context->instance()->udev_list_entry_get_name()(
-        dev_list_entry);
-    if (!path) continue;
-    udev_device* dev =
-        libudev_context->instance()->udev_device_new_from_syspath()(
-            udev_context.instance(), path);
-    if (!dev) continue;
-    const char* device_node =
-        libudev_context->instance()->udev_device_get_devnode()(dev);
-    if (!device_node || device.id.compare(device_node) != 0) {
-      continue;
-    }
-    dev = libudev_context->instance()->
-        udev_device_get_parent_with_subsystem_devtype()(
-            dev, "usb", "usb_device");
-    if (!dev) continue;
-    property_value = libudev_context->instance()->
-        udev_device_get_sysattr_value()(
-            dev, property_name);
-    break;
-  }
-  if (!property_value) {
-    return false;
-  }
-  property->assign(property_value);
-  return true;
-}
-
-bool GetUsbId(const Device& device, std::string* usb_id) {
-  std::string id_vendor;
-  std::string id_product;
-  if (!GetUsbProperty(device, "idVendor", &id_vendor)) {
-    return false;
-  }
-  if (!GetUsbProperty(device, "idProduct", &id_product)) {
-    return false;
-  }
-  usb_id->clear();
-  usb_id->append(id_vendor);
-  usb_id->append(":");
-  usb_id->append(id_product);
-  return true;
-}
-
-bool GetUsbVersion(const Device& device, std::string* usb_version) {
-  return GetUsbProperty(device, "version", usb_version);
-}
-
-}  // namespace cricket