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//
// libavg - Media Playback Engine.
// Copyright (C) 2003-2014 Ulrich von Zadow
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// Current versions can be found at www.libavg.de
//
#ifndef _V4LCamera_H_
#define _V4LCamera_H_
#include "../api.h"
#include "../avgconfigwrapper.h"
#include "Camera.h"
#include <string>
#include <vector>
namespace avg {
typedef unsigned int V4LCID_t;
class AVG_API V4LCamera: public Camera {
struct Buffer {
void * start;
size_t length;
};
public:
V4LCamera(std::string sDevice, int channel, IntPoint size, PixelFormat camPF,
PixelFormat destPF, float frameRate);
virtual ~V4LCamera();
virtual BitmapPtr getImage(bool bWait);
virtual bool isCameraAvailable();
virtual const std::string& getDevice() const;
virtual const std::string& getDriverName() const;
virtual int getFeature(CameraFeature feature) const;
virtual void setFeature(CameraFeature feature, int value,
bool bIgnoreOldValue=false);
virtual void setFeatureOneShot(CameraFeature feature);
virtual int getWhitebalanceU() const;
virtual int getWhitebalanceV() const;
virtual void setWhitebalance(int u, int v, bool bIgnoreOldValue=false);
static CameraInfo* getCameraInfos(int deviceNumber);
static int countCameras();
private:
void initDevice();
void startCapture();
void initMMap();
virtual void close();
int getV4LPF(PixelFormat pf);
static int checkCamera(int j);
static PixelFormat intToPixelFormat(unsigned int pixelformat);
static void getCameraImageFormats(int fd, CameraInfo* camInfo);
static void getCameraControls(int deviceNumber, CameraInfo* camInfo);
void setFeature(V4LCID_t v4lFeature, int value);
V4LCID_t getFeatureID(CameraFeature feature) const;
std::string getFeatureName(V4LCID_t v4lFeature);
bool isFeatureSupported(V4LCID_t v4lFeature) const;
typedef std::map<V4LCID_t, unsigned int> FeatureMap;
typedef std::map<int, std::string> FeatureNamesMap;
FeatureMap m_Features;
// TODO: Feature strings should really be handled by
// Camera::cameraFeatureToString
FeatureNamesMap m_FeaturesNames;
int m_Fd;
int m_Channel;
std::string m_sDevice;
std::string m_sDriverName;
std::vector<Buffer> m_vBuffers;
bool m_bCameraAvailable;
int m_v4lPF;
};
}
#endif
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