webrtc/media/devices/fakedevicemanager.h

/*
 * libjingle
 * Copyright 2008 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.
 */

#ifndef WEBRTC_MEDIA_DEVICES_FAKEDEVICEMANAGER_H_
#define WEBRTC_MEDIA_DEVICES_FAKEDEVICEMANAGER_H_

#include <string>
#include <vector>

#include "webrtc/base/scoped_ptr.h"
#include "webrtc/base/window.h"
#include "webrtc/base/windowpicker.h"
#include "webrtc/media/base/fakevideocapturer.h"
#include "webrtc/media/base/mediacommon.h"
#include "webrtc/media/devices/devicemanager.h"

namespace cricket {

class FakeDeviceManager : public DeviceManagerInterface {
 public:
  FakeDeviceManager() {}
  virtual bool Init() {
    return true;
  }
  virtual void Terminate() {
  }
  virtual int GetCapabilities() {
    std::vector<Device> devices;
    int caps = VIDEO_RECV;
    if (!input_devices_.empty()) {
      caps |= AUDIO_SEND;
    }
    if (!output_devices_.empty()) {
      caps |= AUDIO_RECV;
    }
    if (!vidcap_devices_.empty()) {
      caps |= VIDEO_SEND;
    }
    return caps;
  }
  virtual bool GetAudioInputDevices(std::vector<Device>* devs) {
    *devs = input_devices_;
    return true;
  }
  virtual bool GetAudioOutputDevices(std::vector<Device>* devs) {
    *devs = output_devices_;
    return true;
  }
  virtual bool GetAudioInputDevice(const std::string& name, Device* out) {
    return GetAudioDevice(true, name, out);
  }
  virtual bool GetAudioOutputDevice(const std::string& name, Device* out) {
    return GetAudioDevice(false, name, out);
  }
  virtual bool GetVideoCaptureDevices(std::vector<Device>* devs) {
    *devs = vidcap_devices_;
    return true;
  }
  virtual void SetVideoDeviceCapturerFactory(
      VideoDeviceCapturerFactory* video_device_capturer_factory) {
  }
  virtual void SetScreenCapturerFactory(
      ScreenCapturerFactory* screen_capturer_factory) {
    screen_capturer_factory_.reset(screen_capturer_factory);
  }
  virtual void SetVideoCaptureDeviceMaxFormat(const std::string& usb_id,
                                              const VideoFormat& max_format) {
    max_formats_[usb_id] = max_format;
  }
  bool IsMaxFormatForDevice(const std::string& usb_id,
                            const VideoFormat& max_format) const {
    std::map<std::string, VideoFormat>::const_iterator found =
        max_formats_.find(usb_id);
    return (found != max_formats_.end()) ?
        max_format == found->second :
        false;
  }
  virtual void ClearVideoCaptureDeviceMaxFormat(const std::string& usb_id) {
    max_formats_.erase(usb_id);
  }
  virtual VideoCapturer* CreateVideoCapturer(const Device& device) const {
    return new FakeVideoCapturer();
  }
  virtual VideoCapturer* CreateScreenCapturer(
      const ScreencastId& screenid) const {
    if (!screen_capturer_factory_) {
      return new FakeVideoCapturer();
    }
    return screen_capturer_factory_->Create(screenid);
  }
  virtual bool GetWindows(
      std::vector<rtc::WindowDescription>* descriptions) {
    descriptions->clear();
    const uint32_t id = 1u;  // Note that 0 is not a valid ID.
    const rtc::WindowId window_id =
        rtc::WindowId::Cast(id);
    std::string title = "FakeWindow";
    rtc::WindowDescription window_description(window_id, title);
    descriptions->push_back(window_description);
    return true;
  }
  virtual VideoCapturer* CreateWindowCapturer(rtc::WindowId window) {
    if (!window.IsValid()) {
      return NULL;
    }
    return new FakeVideoCapturer;
  }
  virtual bool GetDesktops(
      std::vector<rtc::DesktopDescription>* descriptions) {
    descriptions->clear();
    const int id = 0;
    const int valid_index = 0;
    const rtc::DesktopId desktop_id =
        rtc::DesktopId::Cast(id, valid_index);
    std::string title = "FakeDesktop";
    rtc::DesktopDescription desktop_description(desktop_id, title);
    descriptions->push_back(desktop_description);
    return true;
  }
  virtual VideoCapturer* CreateDesktopCapturer(rtc::DesktopId desktop) {
    if (!desktop.IsValid()) {
      return NULL;
    }
    return new FakeVideoCapturer;
  }

  virtual bool GetDefaultVideoCaptureDevice(Device* device) {
    if (vidcap_devices_.empty()) {
      return false;
    }
    *device = vidcap_devices_[0];
    return true;
  }

#if defined(WEBRTC_MAC) && !defined(WEBRTC_IOS)
  bool QtKitToSgDevice(const std::string& qtkit_name, Device* out) {
    out->name = qtkit_name;
    out->id = "sg:" + qtkit_name;
    return true;
  }
#endif

  void SetAudioInputDevices(const std::vector<std::string>& devices) {
    input_devices_.clear();
    for (size_t i = 0; i < devices.size(); ++i) {
      input_devices_.push_back(Device(devices[i],
                                      static_cast<int>(i)));
    }
    SignalDevicesChange();
  }
  void SetAudioOutputDevices(const std::vector<std::string>& devices) {
    output_devices_.clear();
    for (size_t i = 0; i < devices.size(); ++i) {
      output_devices_.push_back(Device(devices[i],
                                       static_cast<int>(i)));
    }
    SignalDevicesChange();
  }
  void SetVideoCaptureDevices(const std::vector<std::string>& devices) {
    vidcap_devices_.clear();
    for (size_t i = 0; i < devices.size(); ++i) {
      vidcap_devices_.push_back(Device(devices[i],
                                       static_cast<int>(i)));
    }
    SignalDevicesChange();
  }
  virtual bool GetVideoCaptureDevice(const std::string& name,
                                     Device* out) {
    if (vidcap_devices_.empty())
      return false;

    // If the name is empty, return the default device.
    if (name.empty() || name == kDefaultDeviceName) {
      *out = vidcap_devices_[0];
      return true;
    }

    return FindDeviceByName(vidcap_devices_, name, out);
  }
  bool GetAudioDevice(bool is_input, const std::string& name,
                      Device* out) {
    // If the name is empty, return the default device.
    if (name.empty() || name == kDefaultDeviceName) {
      *out = Device(name, -1);
      return true;
    }

    return FindDeviceByName((is_input ? input_devices_ : output_devices_),
                            name, out);
  }
  static bool FindDeviceByName(const std::vector<Device>& devices,
                               const std::string& name,
                               Device* out) {
    for (std::vector<Device>::const_iterator it = devices.begin();
         it != devices.end(); ++it) {
      if (name == it->name) {
        *out = *it;
        return true;
      }
    }
    return false;
  }

 private:
  std::vector<Device> input_devices_;
  std::vector<Device> output_devices_;
  std::vector<Device> vidcap_devices_;
  std::map<std::string, VideoFormat> max_formats_;
  rtc::scoped_ptr<
    ScreenCapturerFactory> screen_capturer_factory_;
};

}  // namespace cricket

#endif  // WEBRTC_MEDIA_DEVICES_FAKEDEVICEMANAGER_H_