device_info_avfoundation.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim:set ts=2 sw=2 sts=2 et cindent: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this file,

 * You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef DOM_MEDIA_SYSTEMSERVICES_OBJC_VIDEO_CAPTURE_DEVICE_INFO_AVFOUNDATION_H_

#define DOM_MEDIA_SYSTEMSERVICES_OBJC_VIDEO_CAPTURE_DEVICE_INFO_AVFOUNDATION_H_

#include <map>

#include <string>

#include "api/sequence_checker.h"

#include "device_info_objc.h"

#include "modules/video_capture/device_info_impl.h"

namespace webrtc::videocapturemodule {

/**

 * DeviceInfo implementation for the libwebrtc ios/mac sdk camera backend.

 * Single threaded except for DeviceChange() that happens on a platform callback

 * thread.

*/

class DeviceInfoAvFoundation : public DeviceInfoImpl {

 public:

  static int32_t ConvertAVFrameRateToCapabilityFPS(Float64 aRate);

  static webrtc::VideoType ConvertFourCCToVideoType(FourCharCode aCode);

  DeviceInfoAvFoundation();

  virtual ~DeviceInfoAvFoundation();

  // Implementation of DeviceInfoImpl.

  int32_t Init() override { return 0; }

  void DeviceChange() override;

  uint32_t NumberOfDevices() override;

  int32_t GetDeviceName(uint32_t aDeviceNumber, char* aDeviceNameUTF8,

                        uint32_t aDeviceNameLength, char* aDeviceUniqueIdUTF8,

                        uint32_t aDeviceUniqueIdUTF8Length,

                        char* aProductUniqueIdUTF8 = nullptr,

                        uint32_t aProductUniqueIdUTF8Length = 0,

                        pid_t* aPid = nullptr,

                        bool* deviceIsPlaceholder = 0) override;

  int32_t NumberOfCapabilities(const char* aDeviceUniqueIdUTF8) override;

  int32_t GetCapability(const char* aDeviceUniqueIdUTF8,

                        const uint32_t aDeviceCapabilityNumber,

                        VideoCaptureCapability& aCapability) override;

  int32_t DisplayCaptureSettingsDialogBox(const char* aDeviceUniqueIdUTF8,

                                          const char* aDialogTitleUTF8,

                                          void* aParentWindow,

                                          uint32_t aPositionX,

                                          uint32_t aPositionY) override {

    return -1;

  int32_t CreateCapabilityMap(const char* aDeviceUniqueIdUTF8) override

      RTC_EXCLUSIVE_LOCKS_REQUIRED(_apiLock);

 private:

  const std::tuple<std::string, std::string, VideoCaptureCapabilities>*

  FindDeviceAndCapabilities(const std::string& aDeviceUniqueId) const;

  void EnsureCapabilitiesMap();

  SequenceChecker mChecker;

  std::atomic<bool> mInvalidateCapabilities;

  // [{uniqueId, name, capabilities}]

  std::vector<std::tuple<std::string, std::string, VideoCaptureCapabilities>>

      mDevicesAndCapabilities RTC_GUARDED_BY(mChecker);

  const DeviceInfoIosObjC* mDeviceChangeCaptureInfo RTC_GUARDED_BY(mChecker);

};

}  // namespace webrtc::videocapturemodule

#endif