server/image.c

   1 #include "cv.h"
   2 #include "highgui_c.h"
   3 #include "image.h"
   4 #include <string.h>
   5 #include <stdio.h>
   6
   7 CvCapture *capture;
   8 int captureID = -1;
   9
  10 void Image_Handler(FCGIContext * context, char * params)
  11 {
  12         int num = 0, width = 800, height = 600;
  13         FCGIValue val[] = {
  14                 {"num", &num, FCGI_INT_T},
  15                 {"width", &width, FCGI_INT_T},
  16                 {"height", &height, FCGI_INT_T}
  17         };
  18         if (!FCGI_ParseRequest(context, params, val, 3))
  19                 return;
  20         else if (num < 0 || num > 1) {
  21                 FCGI_RejectJSON(context, "Invalid capture number");
  22                 return;
  23         } else if (width <= 0 || height <= 0) {
  24                 FCGI_RejectJSON(context, "Invalid width/height");
  25                 return;
  26         }
  27
  28         if (captureID != num) {
  29                 if (captureID >= 0) {
  30                         cvReleaseCapture(&capture);
  31                 }
  32                 capture = cvCreateCameraCapture(num);
  33                 captureID = num;
  34         }
  35
  36         cvSetCaptureProperty(capture, CV_CAP_PROP_FRAME_WIDTH, width);
  37         cvSetCaptureProperty(capture, CV_CAP_PROP_FRAME_HEIGHT, height);
  38
  39         static int p[] = {CV_IMWRITE_JPEG_QUALITY, 100, 0};
  40
  41         IplImage * frame = cvQueryFrame(capture);
  42         assert(frame != NULL);
  43
  44 //        CvMat stub;
  45  //       CvMat * background = cvGetMat(frame, &stub, 0, 0);
  46
  47 //      CvMat *cv8u = cvCreateMat(frame->width, frame->height, CV_8U);
  48 //      double min, max;
  49 //      CvPoint a,b;
  50 //      cvMinMaxLoc(background, &min, &max, &a, &b, 0);
  51
  52 //      double ccscale = 255.0/(max-min);
  53 //      double ccshift = -min;
  54         //cvCvtScale(frame, cv8u, ccscale, ccshift);
  55         CvMat * jpg = cvEncodeImage(".jpg", frame, p);
  56
  57         // Will this work?
  58         Log(LOGNOTE, "Sending image!");
  59         FCGI_PrintRaw("Content-type: image/jpg\r\n");
  60         FCGI_PrintRaw("Cache-Control: no-cache, no-store, must-revalidate\r\n\r\n");
  61         //FCGI_PrintRaw("Content-Length: %d", jpg->rows*jpg->cols);
  62         FCGI_WriteBinary(jpg->data.ptr,1,jpg->rows*jpg->cols);
  63
  64         cvReleaseMat(&jpg);
  65         cvReleaseImageHeader(&frame);
  66 }