//Set the camera's quality to a certain choice
//Current Choices are:
// 0: Large Fine JPEG
// 2: Medium Fine JPEG
int QualityControl(int quality){
char qualString[20];
if(quality == currentQuality){ //We don't want to take up cycles changing nothing
return -1; //Could define set error codes, but we don't look at them anyway
}
strncpy(qualString, "", sizeof qualString); //Debatably necessary
if(quality == 0){
strncpy(qualString, "Large Fine JPEG", sizeof qualString);
}
else if(quality == 2){
strncpy(qualString, "Medium Fine JPEG", sizeof qualString);
}
else{
return -1;
}
CameraWidget* widget,* child;
if(gp_camera_get_config(getMyCamera(), &widget, getMyContext()) != 0){ //Get our current config
free(widget);
free(child);
return -1; //If it fails, we have failed.
}
//Widgets in libgphoto act sort of as trees of settings/data
//We need to find the right child of the top level, and the right child of that, etc.
//until we get down to the appropriate quality setting widget
//I already parsed through the tree and found the right child, and so
//have hard-coded the values to get to this child here
//Check out gphoto2-widget.c for more info
gp_widget_get_child(widget, 3, &child);
widget = child;
gp_widget_get_child(widget, 0, &child);
widget = child;
//Here we change the quality value to whatever we want
//For some reason, it is saved as a string, not a choice
//Don't ask me why.
gp_widget_set_value(widget, qualString);
gp_widget_get_root(widget, &child);
if(gp_camera_set_config(getMyCamera(), child, getMyContext()) != 0){ //Set the camera's config to our new, modified config
free(widget);
free(child);
return -1;
}
free(widget);
free(child);
currentQuality = quality; //Remember what quality we currently have
return 0;
}
//GET THREAD
//Gets Files over USB. Camera -> Memory
void * GetEvents(void*aaa){
CameraFile* my_File;
CameraEventType my_Type;
void* retevent;
struct timespec time;
char filename[40];
while(1){
CameraControl();
do{
//Wait for camera to fire an event. Most are useless/not used by us
//When a picture is taken (triggered on camera), FILE_ADDED event fired
//retevent will contain a CameraFilePath object with name/loc on camera of file
//Timeout is 100 <units, probably ms>
gp_camera_wait_for_event(getMyCamera(), 100, &my_Type, &retevent, getMyContext());
if(my_Type == GP_EVENT_FILE_ADDED){
CameraFilePath* my_FP = (CameraFilePath*)retevent;
gp_file_new(&my_File);
//Get the file from the given location to memory
gp_camera_file_get(getMyCamera(), my_FP->folder, my_FP->name, GP_FILE_TYPE_NORMAL, my_File, getMyContext());
//Get time in ms since Epoch -> used for filename for Skynet purposes
clock_gettime(CLOCK_REALTIME, &time);
long long time_millis = time.tv_sec * 1000 + time.tv_nsec / 1000000;
sprintf(filename, "%s/%llu.jpg", ImagesFolder.c_str(), time_millis);
AddFile(my_File, filename);
//Save the last obtained Telemetry/GPS to disk, with the same filename we just used
saveLast(time_millis);
//Tell the Save Thread that there is a new CameraFile enqueued
sem_post(&NewFileSem);
free(my_FP);
}
} while(decrementWaitCounter() > 0);
//WaitCounter is a variable used to cycle through images possibly still on the camera
//Used to cycle out images before switching quality, see CameraControl.c
setWaitCounter(0);
}
return NULL;
}
