#include <stdio.h>
#include <pthread.h>
-CvCapture *capture;
-int captureID = -1;
+static CvCapture * g_capture = NULL;
+static int g_captureID = -1;
void Image_Handler(FCGIContext * context, char * params)
{
return;
}
- CvMat * g_src = NULL; // Source Image
- CvMat * g_encoded; // Encoded Image
+ IplImage * src = NULL; // Source Image
+ CvMat * encoded = NULL; // Encoded Image
- Camera_GetImage( num, width, height ,g_src);
- g_encoded = cvEncodeImage("test_encode.jpg",g_src,0);
+ Camera_GetImage( num, width, height ,&src);
+
+ Log(LOGDEBUG, "About to encode");
+ encoded = cvEncodeImage(".jpg",src,0);
+ Log(LOGDEBUG, "Encoded");
Log(LOGNOTE, "Sending image!");
FCGI_PrintRaw("Content-type: image/jpg\r\n");
FCGI_PrintRaw("Cache-Control: no-cache, no-store, must-revalidate\r\n\r\n");
//FCGI_PrintRaw("Content-Length: %d", g_encoded->rows*g_encoded->cols);
- FCGI_WriteBinary(g_encoded->data.ptr,1,g_encoded->rows*g_encoded->cols);
+ FCGI_WriteBinary(encoded->data.ptr,1,encoded->rows*encoded->cols);
- cvReleaseMat(&g_encoded);
- cvReleaseMat(&g_src);
+ cvReleaseMat(&encoded);
+ cvReleaseImageHeader(&src);
}
-
- bool Camera_GetImage(int num, int width, int height, CvMat * image)
+
+/**
+ * Attempts to get an image from a camera
+ * @param num - Camera id
+ * @param width - Width to force
+ * @param height - Height to force
+ * @param image - Pointer to CvMat* to set with result
+ * @returns true on success, false on error
+ */
+ bool Camera_GetImage(int num, int width, int height, IplImage ** frame)
{
+ Log(LOGDEBUG, "Called with arguments num=%d width=%d height=%d frame=%p", num,width,height, frame);
static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER; // Need to use a mutex to ensure 2 captures are not open at once
pthread_mutex_lock(&mutex);
bool result = false;
- capture = cvCreateCameraCapture(num);
+ if( g_capture == NULL)
+ {
+ g_capture = cvCreateCameraCapture(num);
+ g_captureID = num;
+ }
+ else if( num != g_captureID)
+ {
+ cvReleaseCapture(&g_capture);
+ g_capture = cvCreateCameraCapture(num);
+ g_captureID = num;
+ }
+
+ //cvSetCaptureProperty(g_capture, CV_CAP_PROP_FRAME_WIDTH, width);
+ //cvSetCaptureProperty(g_capture, CV_CAP_PROP_FRAME_HEIGHT, height);
- cvSetCaptureProperty(capture, CV_CAP_PROP_FRAME_WIDTH, width);
- cvSetCaptureProperty(capture, CV_CAP_PROP_FRAME_HEIGHT, height);
+ *frame = cvQueryFrame(g_capture);
+ result = (*frame != NULL);
- IplImage * frame = cvQueryFrame(capture);
- if( frame == NULL)
- return result;
+ //cvShowImage("display", *image);
+ //cvWaitKey(0);
+ //cvSaveImage("test.jpg",*image,0);
+
+ Log(LOGDEBUG, "At end of mutex");
+
+ pthread_mutex_unlock(&mutex); //Close the mutex
- // Convert the IplImage pointer to CvMat
- CvMat stub;
- image = cvGetMat(frame, &stub, 0, 0);
- if( image == NULL)
- return result;
+ //NOTE: Never have a "return" statement before the mutex is unlocked; it causes deadlocks!
+ return result;
+}
+void Image_Cleanup()
+{
// Release the capture and IplImage pointers
- cvReleaseImageHeader(&frame);
- cvReleaseCapture(&capture);
-
- pthread_mutex_unlock(&mutex); //Close the mutex
- return true;
+ //cvReleaseImageHeader(&g_frame);
+ cvReleaseCapture(&g_capture);
}