include/avcap/linux/V4L2_ControlBase.h

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00001 /*
00002  * (c) 2005, 2008 Nico Pranke <Nico.Pranke@googlemail.com>, Robin Luedtke <RobinLu@gmx.de> 
00003  *
00004  * This file is part of avcap.
00005  *
00006  * avcap is free software: you can redistribute it and/or modify
00007  * it under the terms of the GNU General Public License as published by
00008  * the Free Software Foundation, either version 3 of the License, or
00009  * (at your option) any later version.
00010  *
00011  * avcap is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014  * GNU General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU General Public License
00017  * along with avcap.  If not, see <http://www.gnu.org/licenses/>.
00018  */
00019 
00020 /* avcap is free for non-commercial use.
00021  * To use it in commercial endeavors, please contact Nico Pranke <Nico.Pranke@googlemail.com>.
00022  */
00023 
00024 #ifndef V4L2_CONTROLBASE_H_
00025 #define V4L2_CONTROLBASE_H_
00026 
00027 #include <string>
00028 #include <list>
00029 #include <linux/videodev.h>
00030 
00031 namespace avcap
00032 {
00033         // forward declaration
00034         class V4L2_DeviceDescriptor;
00035         
00037         
00040         class V4L2_ControlBase
00041         {
00042         protected:
00043                 V4L2_DeviceDescriptor   *mDeviceDescriptor;
00044                 int     mId;
00045                 int mValue;
00046         
00047         private:
00048                 std::string     mName;
00049                 int mDefaultValue;
00050                 int mFlags;
00051 
00052         public:
00053                 V4L2_ControlBase(V4L2_DeviceDescriptor *dd, struct v4l2_queryctrl* query);
00054 
00055                 virtual ~V4L2_ControlBase();
00056 
00057                 inline int getId() const
00058                         { return mId; }
00059 
00060                 inline int getDefaultValue() const
00061                         { return mDefaultValue; }
00062                 
00063                 inline const std::string& getName() const 
00064                         { return mName; }
00065                 
00066                 virtual int setValue(int val);
00067 
00068                 virtual int getValue() const;
00069                 
00070                 virtual int reset();
00071                 
00073                 __u32 getFlags() const { return mFlags; }
00074                 
00075         protected:
00076                 // updates the value of the control
00077                 int update();
00078         };
00079 }
00080 
00081 #endif // V4L2_CONTROLBASE_H_
00082 

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