device_info_v4l2.h

Enable keyboard shortcuts

/*

 *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.

 *  Use of this source code is governed by a BSD-style license

 *  that can be found in the LICENSE file in the root of the source

 *  tree. An additional intellectual property rights grant can be found

 *  in the file PATENTS.  All contributing project authors may

 *  be found in the AUTHORS file in the root of the source tree.

*/

#ifndef MODULES_VIDEO_CAPTURE_LINUX_DEVICE_INFO_V4L2_H_

#define MODULES_VIDEO_CAPTURE_LINUX_DEVICE_INFO_V4L2_H_

#include <stdint.h>

#include "modules/video_capture/device_info_impl.h"

#include "rtc_base/platform_thread.h"

#ifdef WEBRTC_LINUX

#include <sys/inotify.h>

#endif

struct v4l2_capability;

namespace webrtc {

namespace videocapturemodule {

class DeviceInfoV4l2 : public DeviceInfoImpl {

 public:

  DeviceInfoV4l2();

  ~DeviceInfoV4l2() override;

  uint32_t NumberOfDevices() override;

  int32_t GetDeviceName(uint32_t deviceNumber,

                        char* deviceNameUTF8,

                        uint32_t deviceNameLength,

                        char* deviceUniqueIdUTF8,

                        uint32_t deviceUniqueIdUTF8Length,

                        char* productUniqueIdUTF8 = 0,

                        uint32_t productUniqueIdUTF8Length = 0,

                        pid_t* pid = 0,

                        bool* deviceIsPlaceholder = 0) override;

/*

   * Fills the membervariable _captureCapabilities with capabilites for the

   * given device name.

*/

  int32_t CreateCapabilityMap(const char* deviceUniqueIdUTF8) override

      RTC_EXCLUSIVE_LOCKS_REQUIRED(_apiLock);

  int32_t DisplayCaptureSettingsDialogBox(const char* /*deviceUniqueIdUTF8*/,

                                          const char* /*dialogTitleUTF8*/,

                                          void* /*parentWindow*/,

                                          uint32_t /*positionX*/,

                                          uint32_t /*positionY*/) override;

  int32_t FillCapabilities(int fd) RTC_EXCLUSIVE_LOCKS_REQUIRED(_apiLock);

  int32_t Init() override;

 private:

  bool IsDeviceNameMatches(const char* name, const char* deviceUniqueIdUTF8);

  bool IsVideoCaptureDevice(struct v4l2_capability* cap);

#ifdef WEBRTC_LINUX

  void HandleEvent(inotify_event* event, int fd);

  int EventCheck(int fd);

  int HandleEvents(int fd);

  int ProcessInotifyEvents();

  rtc::PlatformThread _inotifyEventThread;

  void InotifyProcess();

  int _fd_v4l, _fd_dev, _wd_v4l, _wd_dev; /* accessed on InotifyEventThread thread */

  std::atomic<bool> _isShutdown;

#endif

};

}  // namespace videocapturemodule

}  // namespace webrtc

#endif  // MODULES_VIDEO_CAPTURE_LINUX_DEVICE_INFO_V4L2_H_