media/capture/video/video_capture_device.cc

// Copyright 2013 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 "media/capture/video/video_capture_device.h"

#include "base/command_line.h"
#include "base/i18n/timezone.h"
#include "base/macros.h"
#include "base/strings/string_util.h"
#include "build/build_config.h"
#include "media/base/media_switches.h"

namespace media {

// TODO(msu.koo): http://crbug.com/532272, remove checking the switch in favour
// of deferring GetModel() call to the actual VideoCaptureDevice object.
const std::string VideoCaptureDevice::Name::GetNameAndModel() const {
  const std::string model_id = GetModel();
  if (model_id.empty())
    return device_name_;
  const std::string suffix = " (" + model_id + ")";
  if (base::EndsWith(device_name_, suffix, base::CompareCase::SENSITIVE) ||
      base::CommandLine::ForCurrentProcess()->HasSwitch(
          switches::kUseFakeDeviceForMediaStream))
    // Ignore |model_id| if |kUseFakeDeviceForMediaStream| flag is present.
    return device_name_;
  return device_name_ + suffix;
}

VideoCaptureDevice::Name::Name() {
}

VideoCaptureDevice::Name::Name(const std::string& name, const std::string& id)
    : device_name_(name), unique_id_(id) {
}

#if defined(OS_LINUX)
VideoCaptureDevice::Name::Name(const std::string& name,
                               const std::string& id,
                               const CaptureApiType api_type)
    : device_name_(name), unique_id_(id), capture_api_class_(api_type) {
}
#elif defined(OS_WIN)
VideoCaptureDevice::Name::Name(const std::string& name,
                               const std::string& id,
                               const CaptureApiType api_type)
    : device_name_(name),
      unique_id_(id),
      capture_api_class_(api_type),
      capabilities_id_(id) {
}
#elif defined(OS_MACOSX)
VideoCaptureDevice::Name::Name(const std::string& name,
                               const std::string& id,
                               const CaptureApiType api_type)
    : device_name_(name),
      unique_id_(id),
      capture_api_class_(api_type),
      transport_type_(OTHER_TRANSPORT) {}

VideoCaptureDevice::Name::Name(const std::string& name,
                               const std::string& id,
                               const CaptureApiType api_type,
                               const TransportType transport_type)
    : device_name_(name),
      unique_id_(id),
      capture_api_class_(api_type),
      transport_type_(transport_type) {}
#elif defined(ANDROID)
VideoCaptureDevice::Name::Name(const std::string& name,
                               const std::string& id,
                               const CaptureApiType api_type)
    : device_name_(name), unique_id_(id), capture_api_class_(api_type) {
}
#endif

VideoCaptureDevice::Name::Name(const Name& other) = default;

VideoCaptureDevice::Name::~Name() {
}

#if defined(OS_LINUX)
const char* VideoCaptureDevice::Name::GetCaptureApiTypeString() const {
  switch (capture_api_type()) {
    case V4L2_SINGLE_PLANE:
      return "V4L2 SPLANE";
    default:
      NOTREACHED() << "Unknown Video Capture API type!";
      return "Unknown API";
  }
}
#elif defined(OS_WIN)
const char* VideoCaptureDevice::Name::GetCaptureApiTypeString() const {
  switch (capture_api_type()) {
    case MEDIA_FOUNDATION:
      return "Media Foundation";
    case DIRECT_SHOW:
      return "Direct Show";
    default:
      NOTREACHED() << "Unknown Video Capture API type!";
      return "Unknown API";
  }
}
#elif defined(OS_MACOSX)
const char* VideoCaptureDevice::Name::GetCaptureApiTypeString() const {
  switch (capture_api_type()) {
    case AVFOUNDATION:
      return "AV Foundation";
    case DECKLINK:
      return "DeckLink";
    default:
      NOTREACHED() << "Unknown Video Capture API type!";
      return "Unknown API";
  }
}
#elif defined(OS_ANDROID)
const char* VideoCaptureDevice::Name::GetCaptureApiTypeString() const {
  switch (capture_api_type()) {
    case API1:
      return "Camera API1";
    case API2_LEGACY:
      return "Camera API2 Legacy";
    case API2_FULL:
      return "Camera API2 Full";
    case API2_LIMITED:
      return "Camera API2 Limited";
    case TANGO:
      return "Tango API";
    case API_TYPE_UNKNOWN:
    default:
      NOTREACHED() << "Unknown Video Capture API type!";
      return "Unknown API";
  }
}
#endif

VideoCaptureDevice::Client::Buffer::~Buffer() {
}

VideoCaptureDevice::~VideoCaptureDevice() {
}

void VideoCaptureDevice::TakePhoto(
    ScopedResultCallback<TakePhotoCallback> callback) {}

PowerLineFrequency VideoCaptureDevice::GetPowerLineFrequencyForLocation()
    const {
  const std::string current_country = base::CountryCodeForCurrentTimezone();
  if (current_country.empty())
    return PowerLineFrequency::FREQUENCY_DEFAULT;
  // Sorted out list of countries with 60Hz power line frequency, from
  // http://en.wikipedia.org/wiki/Mains_electricity_by_country
  const char* countries_using_60Hz[] = {
      "AI", "AO", "AS", "AW", "AZ", "BM", "BR", "BS", "BZ", "CA", "CO",
      "CR", "CU", "DO", "EC", "FM", "GT", "GU", "GY", "HN", "HT", "JP",
      "KN", "KR", "KY", "MS", "MX", "NI", "PA", "PE", "PF", "PH", "PR",
      "PW", "SA", "SR", "SV", "TT", "TW", "UM", "US", "VG", "VI", "VE"};
  const char** countries_using_60Hz_end =
      countries_using_60Hz + arraysize(countries_using_60Hz);
  if (std::find(countries_using_60Hz, countries_using_60Hz_end,
                current_country) == countries_using_60Hz_end) {
    return media::PowerLineFrequency::FREQUENCY_50HZ;
  }
  return media::PowerLineFrequency::FREQUENCY_60HZ;
}

PowerLineFrequency VideoCaptureDevice::GetPowerLineFrequency(
    const VideoCaptureParams& params) const {
  switch (params.power_line_frequency) {
    case media::PowerLineFrequency::FREQUENCY_50HZ:  // fall through
    case media::PowerLineFrequency::FREQUENCY_60HZ:
      return params.power_line_frequency;
    default:
      return GetPowerLineFrequencyForLocation();
  }
}

}  // namespace media