media/video/capture/video_capture_device.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "media/video/capture/video_capture_device.h"
   6
   7 #include "base/i18n/timezone.h"
   8 #include "base/strings/string_util.h"
   9
  10 namespace media {
  11
  12 const std::string VideoCaptureDevice::Name::GetNameAndModel() const {
  13   const std::string model_id = GetModel();
  14   if (model_id.empty())
  15     return device_name_;
  16   const std::string suffix = " (" + model_id + ")";
  17   if (EndsWith(device_name_, suffix, true))  // |true| means case-sensitive.
  18     return device_name_;
  19   return device_name_ + suffix;
  20 }
  21
  22 VideoCaptureDevice::~VideoCaptureDevice() {}
  23
  24 int VideoCaptureDevice::GetPowerLineFrequencyForLocation() const {
  25   std::string current_country = base::CountryCodeForCurrentTimezone();
  26   if (current_country.empty())
  27     return 0;
  28   // Sorted out list of countries with 60Hz power line frequency, from
  29   // http://en.wikipedia.org/wiki/Mains_electricity_by_country
  30   const char* countries_using_60Hz[] = {
  31       "AI", "AO", "AS", "AW", "AZ", "BM", "BR", "BS", "BZ", "CA", "CO",
  32       "CR", "CU", "DO", "EC", "FM", "GT", "GU", "GY", "HN", "HT", "JP",
  33       "KN", "KR", "KY", "MS", "MX", "NI", "PA", "PE", "PF", "PH", "PR",
  34       "PW", "SA", "SR", "SV", "TT", "TW", "UM", "US", "VG", "VI", "VE"};
  35   const char** countries_using_60Hz_end =
  36       countries_using_60Hz + arraysize(countries_using_60Hz);
  37   if (std::find(countries_using_60Hz, countries_using_60Hz_end,
  38                 current_country) == countries_using_60Hz_end) {
  39     return kPowerLine50Hz;
  40   }
  41   return kPowerLine60Hz;
  42 }
  43
  44 }  // namespace media