easimage.h

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#ifndef _EASIMAGE_H_
#define _EASIMAGE_H_

#include <linux/videodev2.h>
#include <SDL/SDL.h>

#define QUOTE(name) #name
#define STR(macro) QUOTE(macro)

#define RGB24   V4L2_PIX_FMT_RGB24
#define BGR24   V4L2_PIX_FMT_BGR24
#define YUYV    V4L2_PIX_FMT_YUYV
#define RGB32   V4L2_PIX_FMT_RGB32
#define RGBA32  V4L2_PIX_FMT_RGB32
#define RGB48   V4L2_PIX_FMT_RGB48
#define GREY    V4L2_PIX_FMT_GREY
#define MJPEG   V4L2_PIX_FMT_MJPEG

#define min(a,b) ( a<b ? a : b )
#define max(a,b) ( a>b ? a : b )


extern int easimageAppEnd;

//forward declarations of internal types
struct Buffer;

typedef struct {
    unsigned int width;     
    unsigned int height;        
    unsigned int format;        
    char *name;         
    int handle;         
    struct Buffer *buffers;     
    unsigned int n_buffers;     
} Camera;

typedef struct {
    unsigned int width;     
    unsigned int height;        
    unsigned short int depth;   
    unsigned int format;        
    unsigned char *mem_ptr;     
    unsigned char *data;        
    char *name;         
} Image;

typedef struct {
    unsigned int width;     
    unsigned int height;        
    SDL_Surface *screen;        
} Viewer;


void init_easimage();
void quit_easimage();
void waitTime(unsigned int milliseconds);
long int GetTime();
int kbhit();
int appProcEvents();

Camera * camOpen(char *dev_name, unsigned int width, unsigned int height, int format);
unsigned int camGetWidth(Camera * cam);
unsigned int camGetHeight(Camera * cam);
Image * camGrabNewImage(Camera * cam);
int camGrabImage(Camera * cam, Image * img);
void camClose(Camera * cam);
int camPrintCaps(Camera *cam);
Image  *imgNew(unsigned int width, unsigned int height, unsigned short depth);
Image  *imgFromBitmap(const char *filename);
Image  *imgFromPPM(const char *filename);
Image  *imgFromFile(const char *filename);
int     imgSavePPM(Image *img, char *fname);
int     imgSavePAM(Image *img, char *fname);
int imgSaveRAW(Image *img, char *fname);
Image  *imgCopy(Image * img);
void    imgScale(Image *img, unsigned int sfactor);
Image  *imgCrop(Image *img, int x1, int y1, int x2, int y2);
Image  *imgCreateGaussian(int dim, float sig);
Image  *imgConvolution(Image *img1, Image *img2, Image *res);
int imgFindPattern(Image *img, Image *pattern, int *x, int *y);
int imgFindPatternArea(Image *img, Image *pattern, int x1, int y1, int x2, int y2, int *x, int *y);
void    imgDestroy(Image * img);
void    imgMakeSymmetricX(Image *img);
void    imgMakeSymmetricY(Image *img);
void    imgMakeSymmetric(Image *img);
int     imgGetSymmetryError(Image *img, int x, int y, int radius);
Image  *imgPatternDifference( Image *img, Image *pat, Image *res, int x1, int y1, int x2, int y2);
int     imgGetPixelDifference(unsigned char *p1, unsigned char *p2);

int     imgGetSumArea( Image *img,                      // Image to analyze 
                        int x1, int y1, int x2, int y2);
float   imgGetMeanArea( Image *img,              // Image to analyze (where to search)
            int x1, int y1, int x2, int y2); // Rectangular area of img to use
float   imgGetMean(Image *img);

unsigned int imgGetWidth(Image * img);
unsigned int imgGetHeight(Image * img);
void     imgSetPixel(Image * img, unsigned int x, unsigned int y, unsigned char *pdata);
void     imgSetPixelRGB(Image * img, unsigned int x, unsigned int y, unsigned char r, unsigned char g, unsigned char b);
void     imgSetPixelRGBA(Image * img, unsigned int x, unsigned int y, unsigned char r, unsigned char g, unsigned char b, unsigned char a);

unsigned char * imgGetPixel(Image * img, unsigned int x, unsigned int y);
unsigned char * imgPixel(Image * img, unsigned int x, unsigned int y);

void MarkImagePositionRGB(Image * img, int x, int y, unsigned char r, unsigned char g, unsigned char b);
void MarkImagePosition(Image * img, int x, int y);

/* Viewer operations */
Viewer * viewOpen(unsigned int width, unsigned int height, const char * title);

void viewDisplayImage(Viewer *view, Image *img);

void viewClose(Viewer *view);

int  viewPollEvent(SDL_Event *event);
#endif // _EASIMAGE_H_