extensions/browser/api/webcam_private/webcam.h

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef EXTENSIONS_BROWSER_API_WEBCAM_PRIVATE_WEBCAM_H_
   6 #define EXTENSIONS_BROWSER_API_WEBCAM_PRIVATE_WEBCAM_H_
   7
   8 #include <set>
   9 #include <string>
  10
  11 #include "base/macros.h"
  12
  13 namespace extensions {
  14
  15 class Webcam {
  16  public:
  17   enum PanDirection {
  18     PAN_LEFT,
  19     PAN_RIGHT,
  20     PAN_STOP,
  21   };
  22
  23   enum TiltDirection {
  24     TILT_UP,
  25     TILT_DOWN,
  26     TILT_STOP,
  27   };
  28
  29   Webcam();
  30   virtual ~Webcam();
  31
  32   virtual void Reset(bool pan, bool tilt, bool zoom) = 0;
  33   virtual bool GetPan(int* value) = 0;
  34   virtual bool GetTilt(int* value) = 0;
  35   virtual bool GetZoom(int* value) = 0;
  36   virtual bool SetPan(int value) = 0;
  37   virtual bool SetTilt(int value) = 0;
  38   virtual bool SetZoom(int value) = 0;
  39   virtual bool SetPanDirection(PanDirection direction) = 0;
  40   virtual bool SetTiltDirection(TiltDirection direction) = 0;
  41
  42   void AddExtensionRef(const std::string& extension_id) {
  43     extension_refs_.insert(extension_id);
  44   }
  45
  46   void RemoveExtensionRef(const std::string& extension_id) {
  47     extension_refs_.erase(extension_id);
  48   }
  49
  50   bool ShouldDelete() {
  51     return extension_refs_.empty();
  52   }
  53
  54  private:
  55   std::set<std::string> extension_refs_;
  56
  57   DISALLOW_COPY_AND_ASSIGN(Webcam);
  58 };
  59
  60 }  // namespace extensions
  61
  62 #endif  // EXTENSIONS_BROWSER_API_WEBCAM_PRIVATE_WEBCAM_H_