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/*
* libjingle
* Copyright 2004 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 TALK_MEDIA_DEVICES_DEVICEMANAGER_H_
#define TALK_MEDIA_DEVICES_DEVICEMANAGER_H_
#include <map>
#include <string>
#include <vector>
#include "talk/base/scoped_ptr.h"
#include "talk/base/sigslot.h"
#include "talk/base/stringencode.h"
#include "talk/base/window.h"
#include "talk/media/base/videocommon.h"
namespace talk_base {
class DesktopDescription;
class WindowDescription;
class WindowPicker;
}
namespace cricket {
class VideoCapturer;
// Used to represent an audio or video capture or render device.
struct Device {
Device() {}
Device(const std::string& first, int second)
: name(first),
id(talk_base::ToString(second)) {
}
Device(const std::string& first, const std::string& second)
: name(first), id(second) {}
std::string name;
std::string id;
};
class VideoCapturerFactory {
public:
VideoCapturerFactory() {}
virtual ~VideoCapturerFactory() {}
virtual VideoCapturer* Create(const Device& device) = 0;
};
// DeviceManagerInterface - interface to manage the audio and
// video devices on the system.
class DeviceManagerInterface {
public:
virtual ~DeviceManagerInterface() { }
// Initialization
virtual bool Init() = 0;
virtual void Terminate() = 0;
// Capabilities
virtual int GetCapabilities() = 0;
// Device enumeration
virtual bool GetAudioInputDevices(std::vector<Device>* devices) = 0;
virtual bool GetAudioOutputDevices(std::vector<Device>* devices) = 0;
virtual bool GetAudioInputDevice(const std::string& name, Device* out) = 0;
virtual bool GetAudioOutputDevice(const std::string& name, Device* out) = 0;
virtual bool GetVideoCaptureDevices(std::vector<Device>* devs) = 0;
virtual bool GetVideoCaptureDevice(const std::string& name, Device* out) = 0;
// Caps the capture format according to max format for capturers created
// by CreateVideoCapturer(). See ConstrainSupportedFormats() in
// videocapturer.h for more detail.
// Note that once a VideoCapturer has been created, calling this API will
// not affect it.
virtual void SetVideoCaptureDeviceMaxFormat(
const std::string& usb_id,
const VideoFormat& max_format) = 0;
virtual void ClearVideoCaptureDeviceMaxFormat(const std::string& usb_id) = 0;
// Device creation
virtual VideoCapturer* CreateVideoCapturer(const Device& device) const = 0;
virtual bool GetWindows(
std::vector<talk_base::WindowDescription>* descriptions) = 0;
virtual VideoCapturer* CreateWindowCapturer(talk_base::WindowId window) = 0;
virtual bool GetDesktops(
std::vector<talk_base::DesktopDescription>* descriptions) = 0;
virtual VideoCapturer* CreateDesktopCapturer(
talk_base::DesktopId desktop) = 0;
sigslot::signal0<> SignalDevicesChange;
static const char kDefaultDeviceName[];
};
class DeviceWatcher {
public:
explicit DeviceWatcher(DeviceManagerInterface* dm) {}
virtual ~DeviceWatcher() {}
virtual bool Start() { return true; }
virtual void Stop() {}
};
class DeviceManagerFactory {
public:
static DeviceManagerInterface* Create();
private:
DeviceManagerFactory() {}
};
class DeviceManager : public DeviceManagerInterface {
public:
DeviceManager();
virtual ~DeviceManager();
void set_device_video_capturer_factory(
VideoCapturerFactory* device_video_capturer_factory) {
device_video_capturer_factory_.reset(device_video_capturer_factory);
}
// Initialization
virtual bool Init();
virtual void Terminate();
// Capabilities
virtual int GetCapabilities();
// Device enumeration
virtual bool GetAudioInputDevices(std::vector<Device>* devices);
virtual bool GetAudioOutputDevices(std::vector<Device>* devices);
virtual bool GetAudioInputDevice(const std::string& name, Device* out);
virtual bool GetAudioOutputDevice(const std::string& name, Device* out);
virtual bool GetVideoCaptureDevices(std::vector<Device>* devs);
virtual bool GetVideoCaptureDevice(const std::string& name, Device* out);
virtual void SetVideoCaptureDeviceMaxFormat(const std::string& usb_id,
const VideoFormat& max_format);
virtual void ClearVideoCaptureDeviceMaxFormat(const std::string& usb_id);
virtual VideoCapturer* CreateVideoCapturer(const Device& device) const;
virtual bool GetWindows(
std::vector<talk_base::WindowDescription>* descriptions);
virtual VideoCapturer* CreateWindowCapturer(talk_base::WindowId window);
virtual bool GetDesktops(
std::vector<talk_base::DesktopDescription>* descriptions);
virtual VideoCapturer* CreateDesktopCapturer(talk_base::DesktopId desktop);
// The exclusion_list MUST be a NULL terminated list.
static bool FilterDevices(std::vector<Device>* devices,
const char* const exclusion_list[]);
bool initialized() const { return initialized_; }
protected:
virtual bool GetAudioDevices(bool input, std::vector<Device>* devs);
virtual bool GetAudioDevice(bool is_input, const std::string& name,
Device* out);
virtual bool GetDefaultVideoCaptureDevice(Device* device);
bool IsInWhitelist(const std::string& key, VideoFormat* video_format) const;
virtual bool GetMaxFormat(const Device& device,
VideoFormat* video_format) const;
void set_initialized(bool initialized) { initialized_ = initialized; }
void set_watcher(DeviceWatcher* watcher) { watcher_.reset(watcher); }
DeviceWatcher* watcher() { return watcher_.get(); }
private:
// The exclusion_list MUST be a NULL terminated list.
static bool ShouldDeviceBeIgnored(const std::string& device_name,
const char* const exclusion_list[]);
bool GetFakeVideoCaptureDevice(const std::string& name, Device* out) const;
VideoCapturer* ConstructFakeVideoCapturer(const Device& device) const;
bool initialized_;
talk_base::scoped_ptr<VideoCapturerFactory> device_video_capturer_factory_;
std::map<std::string, VideoFormat> max_formats_;
talk_base::scoped_ptr<DeviceWatcher> watcher_;
talk_base::scoped_ptr<talk_base::WindowPicker> window_picker_;
};
} // namespace cricket
#endif // TALK_MEDIA_DEVICES_DEVICEMANAGER_H_
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