OpenCV camera capture with send recv protcols - c

Question

I am new with OpenCV.I've implemented a Stop and Wait protocol,in the sender I used OpenCV to capture frames from a webcam send them to a receiver and I'm having a problem using camera with OpenCV in the receiver with the received frames.I receive the error :
OpenCV Error: Bad flag (parameter or structure field) (Unrecognized or unsupported array type) in cvGetMat, file /home/mihai/OpenCV-2.4.1/modules/core/src/array.cpp, line 2482
terminate called after throwing an instance of 'cv::Exception'
what(): /home/mihai/OpenCV-2.4.1/modules/core/src/array.cpp:2482: error: (-206) Unrecognized or unsupported array type in function cvGetMat
send.c
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "lib.h"
#include "cv.h"
#include "highgui.h"
#define HOST "127.0.0.1"
#define PORT 10000
int main(int argc, char *argv[])
{
msg t;
my_pkt p;
int fd, count, filesize;
struct stat f_status;
char buffer[MSGSIZE];
init(HOST, PORT);
printf("[SENDER] Server rocks.\n");
printf("[SENDER] File to send: %s\n", argv[1]);
CvCapture* capture = cvCaptureFromCAM( CV_CAP_ANY );
if(!capture) {
fprintf(stderr, "ERROR:capture is null\n" );
getchar();
return -1;
}
printf("[SERVER] File transfer begins.\n");
while(1) {
IplImage* frame = cvQueryFrame(capture);
if(!frame) {
fprintf(stderr,"ERROR:frame is null...\n");
getchar();
break;
}
memset(t.payload, 0, sizeof(t.payload));
memset(p.payload, 0, sizeof(p.payload));
p.type = TYPE3;
memcpy(p.payload, frame, 8);
t.len = 8;
memcpy(t.payload, &p, t.len);
send_message(&t);
if (recv_message(&t) < 0) {
perror("[SENDER] Receive error");
return -1;
}
p = *((my_pkt *) t.payload);
if (p.type != TYPE4) {
perror("[SENDER] Receive error");
return -1;
}
}
cvReleaseCapture( &capture );
printf("[SERVER] File transfer has ended.\n");
close(fd);
return 0;
}
recv.c
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include "cv.h"
#include "highgui.h"
#include "lib.h"
#define HOST "127.0.0.1"
#define PORT 10001
int main(void)
{
msg t;
my_pkt p;
int filesize, read_so_far, fd;
char filename[MSGSIZE];
init(HOST, PORT);
printf("[RECEIVER] Client rocks.\n");
cvNamedWindow( "camera_jigodiei", CV_WINDOW_AUTOSIZE );
/* Wait for file contents - TYPE 3 messages */
printf("[RECEIVER] Gonna wait for file chunks.\n");
while (1) {
memset(t.payload, 0, sizeof(t.payload));
if (recv_message(&t) < 0) {
perror("[RECEIVER] Receive message");
return -1;
}
p = *((my_pkt*) t.payload);
IplImage* frame=malloc(sizeof(p.payload) );
memmove(frame,&p,sizeof(p.payload) );
if ( !frame ) {
fprintf( stderr, "ERROR: frame is null...\n" );
getchar();
break;
}
cvShowImage( "camera_jigodiei", frame );//HERE I HAVE THE ERROR****
memset(t.payload, 0, sizeof(t.payload));
memset(p.payload, 0, sizeof(p.payload));
p.type = TYPE4;
memcpy(p.payload, ACK_T3, strlen(ACK_T3));
t.len = strlen(p.payload) + sizeof(int);
memcpy(t.payload, &p, t.len);
send_message(&t);
if ( (cvWaitKey(10) & 255) == 27 ) break;
}
cvDestroyWindow( "camera_jigodiei" );
printf("[RECEIVER] All done.\n");
close(fd);
return 0;
}
I've verified that the sender-receiver works sending and receiving the frames and they do.The problem is with OpenCV