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142 lines
3.7 KiB
142 lines
3.7 KiB
/*
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Copyright (C) 2005 by Jasem Mutlaq
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Based on V4L 2 Example
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http://v4l2spec.bytesex.org/spec-single/v4l2.html#CAPTURE-EXAMPLE
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef V4L2_BASE_H
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#define V4L2_BASE_H
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#include <stdio.h>
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#include <stdlib.h>
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#include "linux/videodev2.h"
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#include "../eventloop.h"
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#include "../indidevapi.h"
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#define VIDEO_COMPRESSION_LEVEL 4
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class V4L2_Base
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{
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public:
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V4L2_Base();
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virtual ~V4L2_Base();
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typedef enum { IO_METHOD_READ, IO_METHOD_MMAP, IO_METHOD_USERPTR } io_method;
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struct buffer
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{
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void * start;
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size_t length;
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};
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/* Connection */
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virtual int connectCam(const char * devpath, char *errmsg, int pixelFormat = V4L2_PIX_FMT_YUYV , int width = 160, int height = 120);
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virtual void disconnectCam();
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char * getDeviceName();
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/* Image settings */
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int getBrightness();
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int getContrast();
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int getColor();
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int getHue();
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int getWhiteness();
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void setContrast(int val);
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void setBrightness(int val);
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void setColor(int val);
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void setHue(int val);
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void setWhiteness(int val);
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/* Updates */
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void callFrame(void *p);
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void setPictureSettings();
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void getPictureSettings();
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/* Image Size */
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int getWidth();
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int getHeight();
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virtual int setSize(int x, int y);
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virtual void getMaxMinSize(int & x_max, int & y_max, int & x_min, int & y_min);
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/* Frame rate */
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void setFPS(int fps);
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int getFPS();
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void allocBuffers();
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unsigned char * getY();
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unsigned char * getU();
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unsigned char * getV();
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unsigned char * getColorBuffer();
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void registerCallback(WPF *fp, void *ud);
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int start_capturing(char *errmsg);
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int stop_capturing(char *errmsg);
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static void newFrame(int fd, void *p);
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void enumerate_ctrl (void);
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void enumerate_menu (void);
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int queryINTControls(INumberVectorProperty *nvp);
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int setINTControl(unsigned int ctrl_id, double new_value, char *errmsg);
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int query_ctrl(unsigned int ctrl_id, double & ctrl_min, double & ctrl_max, double & ctrl_step, double & ctrl_value, char *errmsg);
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protected:
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int xioctl(int fd, int request, void *arg);
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int read_frame(char *errsg);
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int uninit_device(char *errmsg);
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int open_device(const char *devpath, char *errmsg);
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int init_device(char *errmsg, int pixelFormat , int width, int height);
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int init_mmap(char *errmsg);
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int errno_exit(const char *s, char *errmsg);
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void close_device(void);
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void init_userp(unsigned int buffer_size);
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void init_read(unsigned int buffer_size);
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void findMinMax();
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struct v4l2_capability cap;
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struct v4l2_cropcap cropcap;
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struct v4l2_crop crop;
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struct v4l2_format fmt;
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struct v4l2_queryctrl queryctrl;
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struct v4l2_querymenu querymenu;
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WPF *callback;
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void *uptr;
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char dev_name[64];
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io_method io;
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int fd;
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struct buffer *buffers;
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unsigned int n_buffers;
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bool dropFrame;
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int frameRate;
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int xmax, xmin, ymax, ymin;
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int selectCallBackID;
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unsigned char * YBuf,*UBuf,*VBuf, *colorBuffer, *rgb24_buffer;
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};
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#endif
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