int CWebCam::SetupWebCam(const char *cparam_names, char *vconfs)
{
int xsize, ysize;
ARParam wparam;
if((ARTVideo = ar2VideoOpen(vconfs)) == 0) return(0);
if(ar2VideoInqSize(ARTVideo, &xsize, &ysize) < 0) return(0);
if(arParamLoad(cparam_names, 1, &wparam) < 0) return(0);
arParamChangeSize(&wparam, xsize, ysize, &ARTCparam);
arInitCparam(&ARTCparam);
arParamDisp(&ARTCparam);
ARTThreshhold = 100;
arglCameraFrustumRH(&ARTCparam, VIEW_DISTANCE_MIN, VIEW_DISTANCE_MAX, projectionMat);
if(ar2VideoCapStart(ARTVideo) != 0) return(0);
ar2VideoCapNext(ARTVideo);
return(1);
}
int arVideoInqSize( int *x, int *y )
{
if( vid == NULL ) return -1;
return ar2VideoInqSize( vid, x, y );
}
/* CHECKED TODO
* PsychAROpenVideoCaptureDevice() -- Create a video capture object.
*
* This function tries to open and initialize a connection to a camera
* and returns the associated captureHandle for it.
*
* slotid = Number of slot in vidcapRecordBANK[] array to use for this camera.
* win = Pointer to window record of associated onscreen window.
* deviceIndex = Index of the grabber device. (Currently ignored)
* capturehandle = handle to the new capture object.
* capturerectangle = If non-NULL a ptr to a PsychRectangle which contains the ROI for capture.
* reqdepth = Number of layers for captured output textures. (0=Don't care, 1=LUMINANCE8, 2=LUMINANCE8_ALPHA8, 3=RGB8, 4=RGBA8)
* num_dmabuffers = Number of buffers in the ringbuffer queue (e.g., DMA buffers) - This is OS specific. Zero = Don't care.
* allow_lowperf_fallback = If set to 1 then PTB can use a slower, low-performance fallback path to get nasty devices working.
* targetmoviefilename and recordingflags are currently ignored, they would refer to video harddics recording capabilities.
*/
psych_bool PsychAROpenVideoCaptureDevice(int slotid, PsychWindowRecordType *win, int deviceIndex, int* capturehandle, double* capturerectangle,
int reqdepth, int num_dmabuffers, int allow_lowperf_fallback, char* targetmoviefilename, unsigned int recordingflags)
{
PsychVidcapRecordType *capdev = NULL;
int w, h;
char msgerr[10000];
char config[1000];
char tmpstr[1000];
config[0] = 0;
tmpstr[0] = 0;
// Default camera config:
#if PSYCH_SYSTEM == PSYCH_WINDOWS
//strcat(config, "<?xml version=\"1.0\" encoding=\"UTF-8\"?><dsvl_input><camera show_format_dialog=\"false\" friendly_name=\"\"><pixel_format><RGB32 flip_h=\"false\" flip_v=\"true\"/></pixel_format></camera></dsvl_input>");
// Prefix:
strcat(config, "<?xml version=\"1.0\" encoding=\"UTF-8\"?><dsvl_input><camera show_format_dialog=\"false\" ");
// Specific deviceIndex requested, instead of auto-select?
if (deviceIndex >= 1 && deviceIndex <= 3) {
// Fetch optional moviename parameter as name spec string:
if (targetmoviefilename == NULL) PsychErrorExitMsg(PsychError_user, "You set 'deviceIndex' to a value of 1, 2 or 3, but didn't provide the required device name string in the 'moviename' argument! Aborted.");
switch(deviceIndex) {
case 1:
sprintf(tmpstr, "friendly_name=\"%s\" ", targetmoviefilename);
break;
case 2:
sprintf(tmpstr, "device_name=\"%s\" ", targetmoviefilename);
break;
case 3:
sprintf(tmpstr, "ieee1394id=\"%s\" ", targetmoviefilename);
break;
}
strcat(config, tmpstr);
}
else {
// Default device index: Just pass through as default device:
strcat(config, "friendly_name=\"\" ");
}
#endif
#if PSYCH_SYSTEM == PSYCH_OSX
char *defaultcamconfig = "";
#endif
#if PSYCH_SYSTEM == PSYCH_LINUX
char *defaultcamconfig = "-dev=/dev/video0 -channel=0 -palette=YUV420P -width=320 -height=240";
#endif
// Init capturehandle to none:
*capturehandle = -1;
if (firsttime) {
// First time invocation:
#if PSYCH_SYSTEM == PSYCH_WINDOWS
// On Windows, we need to delay-load the libARvideo.dll DLL. This loading
// and linking will automatically happen downstream. However, if delay loading
// would fail, we would end up with a crash! For that reason, we try here to
// load the DLL, just to probe if the real load/link/bind op later on will
// likely succeed. If the following LoadLibrary() call fails and returns NULL,
// then we know we would end up crashing. Therefore we'll output some helpful
// error-message instead:
if (NULL == LoadLibrary("libARvideo.dll")) {
// Failed:
printf("\n\nPTB-ERROR: Tried to startup video capture engine type 2 (ARVideo). This didn't work,\n");
printf("PTB-ERROR: because one of the required helper DLL libraries failed to load. Probably because they\n");
printf("PTB-ERROR: could not be found or could not be accessed (e.g., due to permission problems).\n\n");
printf("PTB-ERROR: Please read the online help by typing 'help ARVideoCapture' for troubleshooting instructions.\n\n");
PsychErrorExitMsg(PsychError_user, "Unable to start Videocapture engine ARVideo due to DLL loading problems. Aborted.");
}
#endif
firsttime = FALSE;
}
// Slot 'slotid' will contain the record for our new capture object:
// Initialize new record:
vidcapRecordBANK[slotid].valid = 1;
// Retrieve device record for slotid:
capdev = PsychGetARVidcapRecord(slotid);
capdev->camera = NULL;
capdev->grabber_active = 0;
capdev->scratchbuffer = NULL;
// ROI rectangle specified?
if (capturerectangle) {
// Extract wanted width and height:
w = (int) PsychGetWidthFromRect(capturerectangle);
h = (int) PsychGetHeightFromRect(capturerectangle);
#if PSYCH_SYSTEM == PSYCH_OSX
sprintf(tmpstr, " -width=%i -height=%i", w, h);
#endif
#if PSYCH_SYSTEM == PSYCH_WINDOWS
sprintf(tmpstr, " frame_width=\"%i\" frame_height=\"%i\" ", w, h);
#endif
#if PSYCH_SYSTEM == PSYCH_LINUX
// TODO
#endif
strcat(config, tmpstr);
}
if (num_dmabuffers > 0) {
#if PSYCH_SYSTEM == PSYCH_WINDOWS
// Get framerate from num_dmabuffers argument:
sprintf(tmpstr, " frame_rate=\"%i\" ", num_dmabuffers);
strcat(config, tmpstr);
#endif
}
#if PSYCH_SYSTEM == PSYCH_OSX
// Disable setup dialog:
strcat(config, " -nodialog");
// Specific deviceIndex requested, instead of auto-select?
if (deviceIndex > 0) {
sprintf(tmpstr, " -grabber=%i", deviceIndex + 1);
strcat(config, tmpstr);
}
else {
deviceIndex = 0;
}
switch (reqdepth) {
case 2:
// A no-go: Instead we use 1 channel luminance8:
if (PsychPrefStateGet_Verbosity()>1) printf("PTB-WARNING: Video capture engine doesn't support requested Luminance+Alpha format. Will revert to pure Luminance instead...\n");
case 1:
reqdepth = 1;
sprintf(tmpstr, " -pixelformat=40");
break;
case 3:
reqdepth = 3;
sprintf(tmpstr, " -pixelformat=24");
break;
case 5:
reqdepth = 4;
sprintf(tmpstr, "");
break;
case 4:
case 0:
reqdepth = 4;
sprintf(tmpstr, " -pixelformat=ARGB");
break;
default:
// Unknown format:
PsychErrorExitMsg(PsychError_user, "You requested an invalid image depths (not one of 0, 1, 2, 3 or 4). Aborted.");
}
strcat(config, tmpstr);
#endif
#if PSYCH_SYSTEM == PSYCH_WINDOWS
if (reqdepth == 4 || reqdepth == 0) {
// Default is RGB32 bit:
reqdepth = 4;
sprintf(tmpstr, "><pixel_format><RGB32 flip_h=\"false\" flip_v=\"true\"/></pixel_format></camera></dsvl_input>");
}
else {
// Only other supported format is RGB24 bit:
switch (reqdepth) {
case 1:
if (PsychPrefStateGet_Verbosity()>1) printf("PTB-WARNING: Video capture engine doesn't support requested Luminance format. Will revert to RGB color instead...\n");
break;
case 2:
// A no-go: Instead we use 1 channel luminance8:
if (PsychPrefStateGet_Verbosity()>1) printf("PTB-WARNING: Video capture engine doesn't support requested Luminance+Alpha format. Will revert to RGB color instead...\n");
break;
case 3:
break;
default:
// Unknown format:
PsychErrorExitMsg(PsychError_user, "You requested an invalid image depths (not one of 0, 1, 2, 3 or 4). Aborted.");
}
reqdepth = 3;
sprintf(tmpstr, "><pixel_format><RGB24 flip_h=\"false\" flip_v=\"true\"/></pixel_format></camera></dsvl_input>");
}
strcat(config, tmpstr);
if (deviceIndex == 4) {
// Fetch optional moviename parameter as override configuration string:
if (targetmoviefilename == NULL) PsychErrorExitMsg(PsychError_user, "You set 'deviceIndex' to a value of 4, but didn't provide the required override configuration string in the 'moviename' argument! Aborted.");
// Reset config string:
config[0] = 0;
// And load the moviename argument as override string:
strcat(config, targetmoviefilename);
}
// End of MS-Windows specific setup.
#endif
#if PSYCH_SYSTEM == PSYCH_LINUX
// Specific deviceIndex requested, instead of auto-select?
if (deviceIndex!=-1) {
sprintf(tmpstr, " -dev=/dev/video%i", deviceIndex);
strcat(config, tmpstr);
}
else {
deviceIndex = 0;
}
reqdepth = 3;
#endif
// Requested output texture pixel depth in layers:
capdev->reqpixeldepth = reqdepth;
capdev->pixeldepth = reqdepth * 8;
// Number of DMA ringbuffers to use in DMA capture mode: If no number provided (==0), set it to 8 buffers...
#if PSYCH_SYSTEM == PSYCH_OSX
if (num_dmabuffers == 1) {
// Use single-buffering instead of triple buffering:
strcat(config, " -singlebuffer");
}
else {
num_dmabuffers = 3;
}
capdev->num_dmabuffers = num_dmabuffers;
#else
capdev->num_dmabuffers = num_dmabuffers;
#endif
if (PsychPrefStateGet_Verbosity()>4) printf("PTB-INFO: Final configuration string passed to ARVideo library is:\n%s\n", config);
// Prepare error message in case its needed below:
sprintf(msgerr, "PTB-ERROR: Opening the %i. camera (deviceIndex=%i) failed!\n", deviceIndex + 1, deviceIndex);
// Try to open and initialize camera according to given settings:
capdev->camera = ar2VideoOpen(config);
// Error abort if camera init failed:
if(capdev->camera == NULL) {
// Error abort here:
capdev->valid = 0;
PsychErrorExitMsg(PsychError_user, msgerr);
}
// Our camera should be ready: Assign final handle.
*capturehandle = slotid;
// Increase counter of open capture devices:
numCaptureRecords++;
// Set zero framerate:
capdev->fps = 0;
// Set image size:
ar2VideoInqSize(capdev->camera, &(capdev->width), &(capdev->height));
// Create capture ROI corresponding to width and height of video image:
PsychMakeRect(capdev->roirect, 0, 0, capdev->width, capdev->height);
// Reset framecounter:
capdev->nrframes = 0;
capdev->grabber_active = 0;
printf("PTB-INFO: Camera successfully opened...\n");
return(TRUE);
}
