text: /*
   *  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 WEBRTC_MODULES_VIDEO_CAPTURE_MAIN_SOURCE_DEVICE_INFO_IMPL_H_
  #define WEBRTC_MODULES_VIDEO_CAPTURE_MAIN_SOURCE_DEVICE_INFO_IMPL_H_
  
  #include <vector>
  
  #include "webrtc/modules/video_capture/video_capture.h"
  #include "webrtc/modules/video_capture/video_capture_delay.h"
  #include "webrtc/system_wrappers/include/rw_lock_wrapper.h"
  
  namespace webrtc
  {
  namespace videocapturemodule
  {
  class DeviceInfoImpl: public VideoCaptureModule::DeviceInfo
  {
  public:
      DeviceInfoImpl(const int32_t id);
      virtual ~DeviceInfoImpl(void);
      virtual int32_t NumberOfCapabilities(const char* deviceUniqueIdUTF8);
      virtual int32_t GetCapability(
          const char* deviceUniqueIdUTF8,
          const uint32_t deviceCapabilityNumber,
          VideoCaptureCapability& capability);
  
      virtual int32_t GetBestMatchedCapability(
          const char* deviceUniqueIdUTF8,
          const VideoCaptureCapability& requested,
          VideoCaptureCapability& resulting);
      virtual int32_t GetOrientation(const char* deviceUniqueIdUTF8,
                                     VideoRotation& orientation);
  
  protected:
      /* Initialize this object*/
  
      virtual int32_t Init()=0;
      /*
       * Fills the member variable _captureCapabilities with capabilities for the given device name.
       */
      virtual int32_t CreateCapabilityMap(const char* deviceUniqueIdUTF8)=0;
  
      /* Returns the expected Capture delay*/
      int32_t GetExpectedCaptureDelay(const DelayValues delayValues[],
                                      const uint32_t sizeOfDelayValues,
                                      const char* productId,
                                      const uint32_t width,
                                      const uint32_t height);
  protected:
      // Data members
      int32_t _id;
      typedef std::vector<VideoCaptureCapability> VideoCaptureCapabilities;
      VideoCaptureCapabilities _captureCapabilities;
      RWLockWrapper& _apiLock;
      char* _lastUsedDeviceName;
      uint32_t _lastUsedDeviceNameLength;
  };
  }  // namespace videocapturemodule
  }  // namespace webrtc
  #endif // WEBRTC_MODULES_VIDEO_CAPTURE_MAIN_SOURCE_DEVICE_INFO_IMPL_H_
  