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/*
Copyright (C) 2005 by Jasem Mutlaq
Based on V4L 2 Example
http://v4l2spec.bytesex.org/spec-single/v4l2.html#CAPTURE-EXAMPLE
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 2.1 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef V4L2_BASE_H
#define V4L2_BASE_H
#include <stdio.h>
#include <stdlib.h>
#include "videodev2.h"
#include "../eventloop.h"
#include "../indidevapi.h"
#define VIDEO_COMPRESSION_LEVEL 4
class V4L2_Base
{
public:
V4L2_Base();
virtual ~V4L2_Base();
typedef enum { IO_METHOD_READ, IO_METHOD_MMAP, IO_METHOD_USERPTR } io_method;
struct buffer
{
void * start;
size_t length;
};
/* Connection */
virtual int connectCam(const char * devpath, char *errmsg, int pixelFormat = V4L2_PIX_FMT_YUYV , int width = 160, int height = 120);
virtual void disconnectCam();
char * getDeviceName();
/* Image settings */
int getBrightness();
int getContrast();
int getColor();
int getHue();
int getWhiteness();
void setContrast(int val);
void setBrightness(int val);
void setColor(int val);
void setHue(int val);
void setWhiteness(int val);
/* Updates */
void callFrame(void *p);
void setPictureSettings();
void getPictureSettings();
/* Image Size */
int getWidth();
int getHeight();
virtual int setSize(int x, int y);
virtual void getMaxMinSize(int & x_max, int & y_max, int & x_min, int & y_min);
/* Frame rate */
void setFPS(int fps);
int getFPS();
void allocBuffers();
unsigned char * getY();
unsigned char * getU();
unsigned char * getV();
unsigned char * getColorBuffer();
void registerCallback(WPF *fp, void *ud);
int start_capturing(char *errmsg);
int stop_capturing(char *errmsg);
static void newFrame(int fd, void *p);
void enumerate_ctrl (void);
void enumerate_menu (void);
int queryINTControls(INumberVectorProperty *nvp);
int setINTControl(unsigned int ctrl_id, double new_value, char *errmsg);
int query_ctrl(unsigned int ctrl_id, double & ctrl_min, double & ctrl_max, double & ctrl_step, double & ctrl_value, char *errmsg);
protected:
int xioctl(int fd, int request, void *arg);
int read_frame(char *errsg);
int uninit_device(char *errmsg);
int open_device(const char *devpath, char *errmsg);
int init_device(char *errmsg, int pixelFormat , int width, int height);
int init_mmap(char *errmsg);
int errno_exit(const char *s, char *errmsg);
void close_device(void);
void init_userp(unsigned int buffer_size);
void init_read(unsigned int buffer_size);
void findMinMax();
struct v4l2_capability cap;
struct v4l2_cropcap cropcap;
struct v4l2_crop crop;
struct v4l2_format fmt;
struct v4l2_queryctrl queryctrl;
struct v4l2_querymenu querymenu;
WPF *callback;
void *uptr;
char dev_name[64];
io_method io;
int fd;
struct buffer *buffers;
unsigned int n_buffers;
bool dropFrame;
int frameRate;
int xmax, xmin, ymax, ymin;
int selectCallBackID;
unsigned char * YBuf,*UBuf,*VBuf, *colorBuffer, *rgb24_buffer;
};
#endif
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