set name [lindex [wmf devices] 0]
    }
    if {$name eq ""} {
	$but configure -text "No Camera"
	return
    }
    set dev [wmf open $name [list imagecb $but $img]]
    array set d [wmf parameters $dev]

    if {[info exists d(frame-size)] &&

	[scan $d(frame-size) %dx%d w h] == 2} {
	$img configure -width $w -height $h
	$img blank

    }
    $but configure -text "Start"
}

proc changemirror {w} {
    set dev [wmf info]
    if {$dev ne ""} {

	set name [lindex [wmf devices] 0]
    }
    if {$name eq ""} {
	$but configure -text "No Camera"
	return
    }
    set dev [wmf open $name [list imagecb $but $img]]
    array set flist [wmf listformats $dev]
    set index [wmf format $dev]
    if {[info exists flist($index)]} {
	array set fmt $flist($index)
	if {[scan $fmt(frame-size) %dx%d w h] == 2} {
	    $img configure -width $w -height $h
	    $img blank
	}
    }
    $but configure -text "Start"
}

proc changemirror {w} {
    set dev [wmf info]
    if {$dev ne ""} {

.TP
\fBwmf devices\fR
.
Returns a list of device names which can be used for \fBwmf open\fR.
Each device adds two elements to the list: its symbolic link to be
used in \fBwmf open\fR and its friendly name for presentation.
.TP

.






\fBwmf image\fR \fIdevid\fR ?\fIphotoImage\fR?
.
Copies the most recent captured image of the device \fIdevid\fR into
the photo image identified by \fIphotoImage\fR and returns non-zero on
success or zero if no data transfer has taken place.
If \fIphotoImage\fR is omitted, a four element list is returned with the
first element being the image width, the second the image height,
................................................................................
\fBwmf info\fR ?\fIdevid\fR?
.
Returns information on open devices. If \fIdevid\fR is specified,
a list of two elements is returned, the first being the device symbolic
link and the second the image callback command for that device, i.e. the
same arguments which were used on \fBwmf open\fR. If \fIdevid\fR is omitted,
a list of \fIdevid\fRs, i.e. all currently opened devices is returned.







.TP
\fBwmf mirror\fR \fIdevid\fR ?\fIx y\fR?
.
Retrieves or sets flags to mirror captured images along the X or Y axis.
Parameters \fIx\fR and \fIy\fR if specified must be boolean values.
.TP
\fBwmf open\fR \fIdevname callback\fR
................................................................................
\fIdevname\fR see the description of \fBwmf devices\fR.
.TP
\fBwmf orientation\fR \fIdevid\fR ?\fIdegrees\fR?
.
Retrieves or sets the orientation of captured images regarding image
rotation. \fIDegrees\fR if specified must be an integer number.
.TP
\fBwmf parameters\fR \fIdevid\fR ?\fIkey value ...\fR?
.
Returns or changes device parameters for the device identified by \fIdevid\fR
given as key-value pairs, e.g. \fBframe-size 320x240\fR will change the size
of captured images to width 320 and height 240. The command returns the
current device parameters (after the potential change, when keys and values
where given) as a key-value list which can be processed with \fBarray set\fR
or \fBdict get\fR. Currently, this command does nothing. 
.TP
\fBwmf start\fR \fIdevid\fR
Starts capturing images of the device identified by \fIdevid\fR. When
an image is ready, the callback command set on \fBwmf open\fR is
invoked.
.
.TP
\fBwmf state\fR \fIdevid\fR

Returns the image capture state of the device identified by \fIdevid\fR.
The result is the string \fBcapture\fR if the device is started or
\fBstop\fR if the device is stopped.
.
.TP
\fBwmf stop\fR \fIdevid\fR

Stops capturing images of the device identified by \fIdevid\fR.
.
.SH "SEE ALSO"
photo(n), image(n)
.SH KEYWORDS
files, image, photo, video, camera
'\" Local Variables:
'\" mode: nroff
'\" fill-column: 78
'\" End:

.TP
\fBwmf devices\fR
.
Returns a list of device names which can be used for \fBwmf open\fR.
Each device adds two elements to the list: its symbolic link to be
used in \fBwmf open\fR and its friendly name for presentation.
.TP
\fBwmf format\fR \fIdevid\fR ?\fIindex\fR?
.
Returns or changes the media format of the device identifed by \fIdevid\fR.
The optional parameter \fIindex\fR is an integer number giving the index of
the media format to be used as returned in \fBwmf listformats\fR. If omitted,
the currently active index is returned. Changing the media format is only
possible if the device is not capturing images.
.TP
\fBwmf image\fR \fIdevid\fR ?\fIphotoImage\fR?
.
Copies the most recent captured image of the device \fIdevid\fR into
the photo image identified by \fIphotoImage\fR and returns non-zero on
success or zero if no data transfer has taken place.
If \fIphotoImage\fR is omitted, a four element list is returned with the
first element being the image width, the second the image height,
................................................................................
\fBwmf info\fR ?\fIdevid\fR?
.
Returns information on open devices. If \fIdevid\fR is specified,
a list of two elements is returned, the first being the device symbolic
link and the second the image callback command for that device, i.e. the
same arguments which were used on \fBwmf open\fR. If \fIdevid\fR is omitted,
a list of \fIdevid\fRs, i.e. all currently opened devices is returned.
.TP
\fBwmf listformats\fR \fIdevid\fR
.
Returns a dictionary keyed by a media format index as integer with the
values being another dictionary with information about the frame size
and rate of that media format. The respective index can be used
in \fBwmf format\fR.
.TP
\fBwmf mirror\fR \fIdevid\fR ?\fIx y\fR?
.
Retrieves or sets flags to mirror captured images along the X or Y axis.
Parameters \fIx\fR and \fIy\fR if specified must be boolean values.
.TP
\fBwmf open\fR \fIdevname callback\fR
................................................................................
\fIdevname\fR see the description of \fBwmf devices\fR.
.TP
\fBwmf orientation\fR \fIdevid\fR ?\fIdegrees\fR?
.
Retrieves or sets the orientation of captured images regarding image
rotation. \fIDegrees\fR if specified must be an integer number.
.TP
\fBwmf start\fR \fIdevid\fR
.








Starts capturing images of the device identified by \fIdevid\fR. When
an image is ready, the callback command set on \fBwmf open\fR is
invoked.

.TP
\fBwmf state\fR \fIdevid\fR
.
Returns the image capture state of the device identified by \fIdevid\fR.
The result is the string \fBcapture\fR if the device is started or
\fBstop\fR if the device is stopped.

.TP
\fBwmf stop\fR \fIdevid\fR
.
Stops capturing images of the device identified by \fIdevid\fR.
.
.SH "SEE ALSO"
photo(n), image(n)
.SH KEYWORDS
files, image, photo, video, camera
'\" Local Variables:
'\" mode: nroff
'\" fill-column: 78
'\" End:

    int maxLength;		/* Max. length of pixel buffer. */
    int ready;			/* Zero when free, positive when filled. */
    int fourcc;			/* Media format code. */
    int width, height;		/* Width and height in pixels. */
    int stride;			/* Line increment in bytes. */
} Frame;















/*
 * Control structure for capture.
 */

typedef struct WMFC {
    IMFMediaSource *mediaSrc;	/* Handle for device. */
    IMFSourceReader *srcReader;	/* Handle for capture. */
    Tcl_Interp *interp;		/* Interpreter for this object. */
    char devId[32];		/* Device id. */
    Tcl_DString devName;	/* Device name. */
    int cbCmdLen;               /* Initial length of callback command. */
    Tcl_DString cbCmd;          /* Callback command prefix. */
    int fourcc, compr;		/* FOURCC and compression. */
    int stride, width, height;	/* Image dimensions. */
    int mirror;			/* Image mirror flags. */
    int rotate;			/* Image rotation in degrees. */
    Tcl_WideInt counters[4];	/* Statistic counters. */



#ifdef USE_ASYNC_HANDLER
    Tcl_AsyncHandler async;	/* For signalling captured image. */
#else
    Tcl_ThreadId tid;		/* Thread identifier of interp. */
#endif
    SourceReaderCB srcb;	/* Callback interface object. */

    int frameReady;		/* Frame index with data or -1. */
    int frameQueued;		/* Next frame index to be filled. */
    Frame frame[2];		/* Frame buffers. */
} WMFC;

#ifndef USE_ASYNC_HANDLER

................................................................................

    if (!SUCCEEDED(hrStatus)) {
	hr = hrStatus;
    }
    EnterCriticalSection(&srcb->lock);
    wmfc = srcb->wmfc;
    if ((wmfc->frameQueued < 0) || !SUCCEEDED(hr)) {
	LeaveCriticalSection(&srcb->lock);
	return hr;
    }
    if (sample == NULL) {




	goto done;
    }
    wmfc->counters[0] += 1;
    index = wmfc->frameQueued;
    hr = sample->lpVtbl->ConvertToContiguousBuffer(sample, &mbuf);
    if (SUCCEEDED(hr)) {
	DWORD length = 0, maxLength = 0;
................................................................................
    int capture = (wmfc->async != NULL);
#else
    int capture = (wmfc->tid != NULL);
#endif

    Tcl_DStringSetLength(&wmfc->cbCmd, wmfc->cbCmdLen);
    Tcl_DStringAppendElement(&wmfc->cbCmd, wmfc->devId);




    Tcl_DStringAppendElement(&wmfc->cbCmd, capture ? "capture" : "stop");

    Tcl_Preserve((ClientData) interp);
    ret = Tcl_EvalEx(interp, Tcl_DStringValue(&wmfc->cbCmd),
		     Tcl_DStringLength(&wmfc->cbCmd), TCL_EVAL_GLOBAL);
    if (ret != TCL_OK) {
	StopCapture(wmfc);
	Tcl_AddErrorInfo(interp, "\n    (wmf event handler)");
 	Tcl_BackgroundError(interp);
................................................................................
#ifdef USE_ASYNC_HANDLER
	Tcl_AsyncDelete(wmfc->async);
	wmfc->async = NULL;
#else
	wmfc->tid = NULL;
#endif
    }
#ifdef USE_ASYNC_HANDLER
    if (bufok || dostop) {
	Tcl_CancelIdleCall(ImageCallback, clientData);
	Tcl_DoWhenIdle(ImageCallback, clientData);
    }
#else
    if (bufok || dostop) {
	ImageCallback((ClientData) wmfc);
    }
#endif
    return code;
}
 
/*
 *-------------------------------------------------------------------------
 *
 * SetFormat --
 *
 *	Set media source and source reader format given index.
 *	which was obtained by FindYUVMediaType().
 *
 *-------------------------------------------------------------------------
 */

static HRESULT
SetFormat(IMFMediaSource *mediaSrc, IMFSourceReader *srcReader, int index)
{
................................................................................
    }
    return hr;
}
 
/*
 *-------------------------------------------------------------------------
 *
 * FindYUVMediaType --
 *
 *	Find the first YUY2 or NV12 media type given media source.
 *	Returns index of the media type or -1 when nothing found.
 *
 *-------------------------------------------------------------------------
 */

static int
FindYUVMediaType(IMFMediaSource *mediaSrc)
{
    IMFPresentationDescriptor *pd = NULL;
    IMFStreamDescriptor *sd = NULL;
    IMFMediaTypeHandler *handler = NULL;
    IMFMediaType *mediaType = NULL;

    BOOL selected;
    DWORD i, count = 0;
    int found = -1;

    HRESULT hr;

    hr = mediaSrc->lpVtbl->CreatePresentationDescriptor(mediaSrc, &pd);
    if (!SUCCEEDED(hr)) {
	goto done;
    }
    hr = pd->lpVtbl->GetStreamDescriptorByIndex(pd, 0, &selected, &sd);
................................................................................
    hr = sd->lpVtbl->GetMediaTypeHandler(sd, &handler);
    if (!SUCCEEDED(hr)) {
	goto done;
    }
    hr = handler->lpVtbl->GetMediaTypeCount(handler, &count);
    if (!SUCCEEDED(hr)) {
	goto done;




    }
    for (i = 0; i < count; i++) {
	GUID subType = GUID_NULL;





	hr = handler->lpVtbl->GetMediaTypeByIndex(handler, i, &mediaType);
	if (!SUCCEEDED(hr)) {
	    break;
	}
	hr = mediaType->lpVtbl->GetGUID(mediaType, &MF_MT_SUBTYPE, &subType);
	if (mediaType != NULL) {
	    mediaType->lpVtbl->Release(mediaType);
	    mediaType = NULL;
	}
	if (SUCCEEDED(hr)) {

	    if ((subType.Data1 == FOURCC_NV12) ||
		(subType.Data1 == FOURCC_YUY2)) {

		found = i;
		break;




	    }




	}




































    }
done:
    if (handler != NULL) {
	handler->lpVtbl->Release(handler);
    }
    if (sd != NULL) {
	sd->lpVtbl->Release(sd);
    }
    if (pd != NULL) {
	pd->lpVtbl->Release(pd);
    }





    return found;
}
 
/*
 *-------------------------------------------------------------------------
 *
 * GetFormat --
 *
................................................................................
 *	Get information about the media format (width, height etc.)
 *	and try to switch MJPG source to YUY2 or NV12 format.
 *
 *-------------------------------------------------------------------------
 */

static int
GetFormat(Tcl_Interp *interp, IMFMediaSource *mediaSrc,
	  IMFSourceReader *srcReader,
	  int *fourcc, int *compr, int *stride, int *width, int *height)
{
    HRESULT hr;


    IMFMediaType *mediaType = NULL;
    GUID subType = GUID_NULL;
    LONG lval = 0;
    UINT32 uval = 0;
    UINT64 wval = 0;
    UINT32 w = 0, h = 0;
    BOOL isCompressed = FALSE;
    int result = TCL_ERROR;

    hr = srcReader->lpVtbl->GetCurrentMediaType(srcReader,
		MF_SOURCE_READER_FIRST_VIDEO_STREAM, &mediaType);
    if (!SUCCEEDED(hr)) {
	Tcl_SetResult(interp, "cannot get media type from source reader",
		      TCL_STATIC);
	goto done;
    }
    mediaType->lpVtbl->IsCompressedFormat(mediaType, &isCompressed);
    *compr = isCompressed;
    hr = mediaType->lpVtbl->GetGUID(mediaType, &MF_MT_SUBTYPE, &subType);
    if (!SUCCEEDED(hr)) {
	Tcl_SetResult(interp, "cannot get MF_MT_SUBTYPE", TCL_STATIC);
	goto done;
    }
    if (subType.Data1 == FOURCC_MJPG) {
	/* try to switch from MJPG to YUY2 or NV12 */
	int index = FindYUVMediaType(mediaSrc);

	if (index < 0) {
	    Tcl_SetResult(interp, "no suitable media format found",
			  TCL_STATIC);
	    goto done;
	}
	hr = SetFormat(mediaSrc, srcReader, index);
	if (!SUCCEEDED(hr)) {
	    Tcl_SetResult(interp, "cannot switch to usable media format",
			  TCL_STATIC);
	    goto done;
	}
	mediaType->lpVtbl->Release(mediaType);
	mediaType = NULL;
	hr = srcReader->lpVtbl->GetCurrentMediaType(srcReader,
			MF_SOURCE_READER_FIRST_VIDEO_STREAM, &mediaType);
	if (!SUCCEEDED(hr)) {
	    Tcl_SetResult(interp, "cannot get media type from source reader",
			  TCL_STATIC);
	    goto done;
	}
	mediaType->lpVtbl->IsCompressedFormat(mediaType, &isCompressed);
	*compr = isCompressed;
	hr = mediaType->lpVtbl->GetGUID(mediaType, &MF_MT_SUBTYPE, &subType);
	if (!SUCCEEDED(hr)) {
	    Tcl_SetResult(interp, "cannot get MF_MT_SUBTYPE", TCL_STATIC);
	    goto done;
	}
    }
    if ((subType.Data1 != FOURCC_NV12) && (subType.Data1 != FOURCC_YUY2)) {
	Tcl_SetObjResult(interp,
		Tcl_ObjPrintf("unsupported fourcc 0x%08lX", subType.Data1));

	goto done;
    }
    *fourcc = subType.Data1;
    hr = mediaType->lpVtbl->GetUINT32(mediaType, &MF_MT_DEFAULT_STRIDE, &uval);
    if (!SUCCEEDED(hr)) {
	hr = mediaType->lpVtbl->GetUINT64(mediaType, &MF_MT_FRAME_SIZE, &wval);
	if (SUCCEEDED(hr)) {
	    w = wval >> 32;
	    h = wval;
	}
	if (!SUCCEEDED(hr)) {
	    Tcl_SetResult(interp, "cannot get MF_MT_FRAME_SIZE", TCL_STATIC);
	    goto done;
	}
	hr = MFGetStrideForBitmapInfoHeader(subType.Data1, w, &lval);
	if (!SUCCEEDED(hr)) {
	    Tcl_SetResult(interp, "cannot get stride", TCL_STATIC);
	    goto done;
	}
	mediaType->lpVtbl->SetUINT32(mediaType, &MF_MT_DEFAULT_STRIDE,
				     (UINT32) lval);
	*stride = lval;
	*width = w;
	*height = h;
    } else {
	*stride = uval;
	hr = mediaType->lpVtbl->GetUINT64(mediaType, &MF_MT_FRAME_SIZE, &wval);
	if (!SUCCEEDED(hr)) {
	    Tcl_SetResult(interp, "cannot MF_MT_FRAME_SIZE", TCL_STATIC);
	    goto done;
	}
	w = wval >> 32;
	h = wval;
	*width = w;
	*height = h;
    }
    result = TCL_OK;
done:
    if (mediaType != NULL) {
	mediaType->lpVtbl->Release(mediaType);
    }
    return result;
}
................................................................................
    IMFAttributes *attr = NULL;
    HRESULT hr;
    int doread = 0;

    if (wmfc->srcReader == NULL) {
	hr = MFCreateAttributes(&attr, 1);
	if (!SUCCEEDED(hr)) {
	    Tcl_SetResult(interp, "cannot create WMF attributes", TCL_STATIC);
	    return TCL_ERROR;
	}
	wmfc->counters[0] = wmfc->counters[1] = 0;
	wmfc->counters[2] = wmfc->counters[3] = 0;
	wmfc->frame[0].ready = wmfc->frame[1].ready = 0;

	wmfc->frameReady = wmfc->frameQueued = -1;
	wmfc->srcb.isrcb.lpVtbl = &SourceReaderVtbl;
	wmfc->srcb.refCount = 1;
	wmfc->srcb.wmfc = wmfc;
	hr = attr->lpVtbl->SetUnknown(attr,
				      &MF_SOURCE_READER_ASYNC_CALLBACK,
				      (struct IUnknown *) &wmfc->srcb);
................................................................................
	    attr->lpVtbl->Release(attr);
	}
	if (!SUCCEEDED(hr)) {
	    if (wmfc->srcReader != NULL) {
		wmfc->srcReader->lpVtbl->Release(wmfc->srcReader);
		wmfc->srcReader = NULL;
	    }
	    Tcl_SetResult(interp, "cannot create source reader", TCL_STATIC);
	    return TCL_ERROR;
	}



	if (GetFormat(interp, wmfc->mediaSrc, wmfc->srcReader,
		      &wmfc->fourcc, &wmfc->compr,
		      &wmfc->stride, &wmfc->width, &wmfc->height) != TCL_OK) {







 	    wmfc->srcReader->lpVtbl->Release(wmfc->srcReader);
	    wmfc->srcReader = NULL;
	    return TCL_ERROR;
	}
    }
    EnterCriticalSection(&wmfc->srcb.lock);
#ifdef USE_ASYNC_HANDLER
................................................................................
#else
    if (wmfc->tid == NULL) {
	wmfc->tid = Tcl_GetCurrentThread();
	doread = 1;
    }
#endif
    if (doread) {

	wmfc->counters[0] = wmfc->counters[1] = 0;
	wmfc->counters[2] = wmfc->counters[3] = 0;
	wmfc->frameQueued = wmfc->frameReady ? 0 : 1;
	wmfc->frame[wmfc->frameQueued].ready = 0;
	hr = wmfc->srcReader->lpVtbl->ReadSample(wmfc->srcReader,
						 MF_SOURCE_READER_ANY_STREAM,
						 0, NULL, NULL, NULL, NULL);
................................................................................
#endif
	}
    } else {
	hr = S_OK;
    }
    LeaveCriticalSection(&wmfc->srcb.lock);
    if (!SUCCEEDED(hr)) {
	Tcl_SetResult(interp, "cannot initiate read from source reader",
		      TCL_STATIC);
	return TCL_ERROR;
    }
    return TCL_OK;
}
 
/*
................................................................................
 *-------------------------------------------------------------------------
 */

static int
StopCapture(WMFC *wmfc)
{
#ifdef USE_ASYNC_HANDLER
    int docancel = 0;

    EnterCriticalSection(&wmfc->srcb.lock);
    if (wmfc->async != NULL) {
        Tcl_AsyncDelete(wmfc->async);
        wmfc->async = NULL;
	docancel = 1;
    }
    wmfc->frameQueued = -1;

    LeaveCriticalSection(&wmfc->srcb.lock);
    if (docancel) {
	Tcl_CancelIdleCall(ImageCallback, (ClientData) wmfc);
    }

#else
    EnterCriticalSection(&wmfc->srcb.lock);
    wmfc->tid = NULL;



    wmfc->frameQueued = -1;




    LeaveCriticalSection(&wmfc->srcb.lock);
#endif

    return TCL_OK;
}
 
/*
 *-------------------------------------------------------------------------
 *
 * GetImage --
................................................................................
{
    WMFI *wmfi = (WMFI *) clientData;
    WMFC *wmfc;
    Tcl_HashEntry *hPtr;
    int ret = TCL_OK, command;

    static const char *cmdNames[] = {
	"close", "counters", "devices", "image", "info",
	"mirror", "open", "orientation", "parameters",
	"start", "state", "stop", NULL
    };
    enum cmdCode {
	CMD_close, CMD_counters, CMD_devices, CMD_image, CMD_info,
	CMD_mirror, CMD_open, CMD_orientation, CMD_parameters,
	CMD_start, CMD_state, CMD_stop
    };

    if (objc < 2) {
	Tcl_WrongNumArgs(interp, 1, objv, "option ...");
	return TCL_ERROR;
    }
................................................................................
	    ckfree((char *) wmfc->frame[0].data);
	}
	if (wmfc->frame[1].data != NULL) {
	    ckfree((char *) wmfc->frame[1].data);
	}
	Tcl_DStringFree(&wmfc->devName);
	Tcl_DStringFree(&wmfc->cbCmd);



	DeleteCriticalSection(&wmfc->srcb.lock);
	ckfree((char *) wmfc);
	break;
    }

    case CMD_counters: {
	if (objc != 3) {
................................................................................
	if (objc != 2) {
	    Tcl_WrongNumArgs(interp, 2, objv, NULL);
	    return TCL_ERROR;
	}
	ret = ListDevices(interp);
	break;
    }
































































    case CMD_image: {
	if ((objc < 3) || (objc > 4)) {
	    Tcl_WrongNumArgs(interp, 2, objv, "devid ?photoImage?");
	    return TCL_ERROR;
	}
	hPtr = Tcl_FindHashEntry(&wmfi->wmfc, Tcl_GetString(objv[2]));
................................................................................
		Tcl_SetObjResult(interp, Tcl_NewListObj(2, r));
	    } else {
		goto devNotFound;
	    }
	}
	break;
    }




























































    case CMD_mirror: {
	int x, y;

	if ((objc != 3) && (objc != 5)) {
	    Tcl_WrongNumArgs(interp, 3, objv, "?x y?");
	    return TCL_ERROR;
................................................................................
	    Tcl_SetObjResult(interp, Tcl_NewListObj(2, list));
	}
	break;
    }

    case CMD_open: {
	char *devName;
	int isNew;
	IMFMediaSource *mediaSrc;
	Tcl_HashSearch search;


	if (objc != 4) {
	    Tcl_WrongNumArgs(interp, 2, objv, "device callback");
	    return TCL_ERROR;
	}
	devName = Tcl_GetString(objv[2]);
	hPtr = Tcl_FirstHashEntry(&wmfi->wmfc, &search);
................................................................................
		return TCL_ERROR;
	    }
	    hPtr = Tcl_NextHashEntry(&search);
	}
	mediaSrc = GetSource(devName);
	if (mediaSrc == NULL) {
	    Tcl_SetObjResult(interp,
		Tcl_ObjPrintf("cannot open \"%s\"", devName));







	    return TCL_ERROR;
	}
	wmfc = (WMFC *) ckalloc(sizeof (WMFC));
	memset(wmfc, 0, sizeof (WMFC));
	wmfc->mediaSrc = mediaSrc;
	wmfc->srcReader = NULL;

	wmfc->frameReady = wmfc->frameQueued = -1;
        wmfc->mirror = 0;
        wmfc->rotate = 0;
        wmfc->interp = interp;
	InitializeCriticalSection(&wmfc->srcb.lock);
 	Tcl_DStringInit(&wmfc->devName);
	Tcl_DStringAppend(&wmfc->devName, devName, -1);
	Tcl_DStringInit(&wmfc->cbCmd);
	Tcl_DStringAppend(&wmfc->cbCmd, Tcl_GetString(objv[3]), -1);



	wmfc->cbCmdLen = Tcl_DStringLength(&wmfc->cbCmd);
	sprintf(wmfc->devId, "wmfdev%d", wmfi->idCount++);
	hPtr = Tcl_CreateHashEntry(&wmfi->wmfc, wmfc->devId, &isNew);
	Tcl_SetHashValue(hPtr, (ClientData) wmfc);
	Tcl_SetObjResult(interp, Tcl_NewStringObj(wmfc->devId, -1));
	break;
    }
................................................................................
	    }
	} else {
	    Tcl_SetObjResult(interp, Tcl_NewIntObj(wmfc->rotate));
	}
	break;
    }

    case CMD_parameters: {
	if ((objc < 3) || (objc % 2 == 0)) {
	    Tcl_WrongNumArgs(interp, 2, objv, "devid ?key value ...?");
	    return TCL_ERROR;
	}
 	break;
    }

    case CMD_start: {
	if (objc != 3) {
	    Tcl_WrongNumArgs(interp, 2, objv, "devid");
	    return TCL_ERROR;
	}
	hPtr = Tcl_FindHashEntry(&wmfi->wmfc, Tcl_GetString(objv[2]));
	if (hPtr == NULL) {
................................................................................
	}
	wmfc = (WMFC *) Tcl_GetHashValue(hPtr);
	ret = StartCapture(wmfc);
	break;
    }

    case CMD_state: {


	if (objc != 3) {
	    Tcl_WrongNumArgs(interp, 2, objv, "devid");
	    return TCL_ERROR;
	}
	hPtr = Tcl_FindHashEntry(&wmfi->wmfc, Tcl_GetString(objv[2]));
	if (hPtr == NULL) {
	    goto devNotFound;
	}
	wmfc = (WMFC *) Tcl_GetHashValue(hPtr);
	Tcl_SetResult(interp,



#ifdef USE_ASYNC_HANDLER
		      (wmfc->async != NULL)
#else
		      (wmfc->tid != NULL)
#endif
		      ? "capture" : "stop", TCL_STATIC);


	break;
    }

    case CMD_stop: {
	if (objc != 3) {
	    Tcl_WrongNumArgs(interp, 2, objv, "devid");
	    return TCL_ERROR;

    int maxLength;		/* Max. length of pixel buffer. */
    int ready;			/* Zero when free, positive when filled. */
    int fourcc;			/* Media format code. */
    int width, height;		/* Width and height in pixels. */
    int stride;			/* Line increment in bytes. */
} Frame;

/*
 * Media format.
 */

typedef struct {
    int index;			/* Index for activation. */
    int fourcc;			/* Four character code. */
    int width, height;		/* Width and height in pixels. */
    int stride;			/* Line increment in bytes. */
    UINT64 frameRate;		/* Rate (nominator/denominator). */
    UINT64 frameRateMin;	/* Min. rate (nominator/denominator). */
    UINT64 frameRateMax;	/* Max. rate (nominator/denominator). */
} MediaFmt;

/*
 * Control structure for capture.
 */

typedef struct WMFC {
    IMFMediaSource *mediaSrc;	/* Handle for device. */
    IMFSourceReader *srcReader;	/* Handle for capture. */
    Tcl_Interp *interp;		/* Interpreter for this object. */
    char devId[32];		/* Device id. */
    Tcl_DString devName;	/* Device name. */
    int cbCmdLen;               /* Initial length of callback command. */
    Tcl_DString cbCmd;          /* Callback command prefix. */
    int fourcc;			/* Media format code. */
    int stride, width, height;	/* Image dimensions. */
    int mirror;			/* Image mirror flags. */
    int rotate;			/* Image rotation in degrees. */
    Tcl_WideInt counters[4];	/* Statistic counters. */
    int useFmt;			/* MediaFmt index to use. */
    int numFmts;		/* Number formats in fmts. */
    MediaFmt *fmts;		/* Array of MediaFmts or NULL. */
#ifdef USE_ASYNC_HANDLER
    Tcl_AsyncHandler async;	/* For signalling captured image. */
#else
    Tcl_ThreadId tid;		/* Thread identifier of interp. */
#endif
    SourceReaderCB srcb;	/* Callback interface object. */
    int streamEnd;		/* Indicates capture error or EOF. */
    int frameReady;		/* Frame index with data or -1. */
    int frameQueued;		/* Next frame index to be filled. */
    Frame frame[2];		/* Frame buffers. */
} WMFC;

#ifndef USE_ASYNC_HANDLER

................................................................................

    if (!SUCCEEDED(hrStatus)) {
	hr = hrStatus;
    }
    EnterCriticalSection(&srcb->lock);
    wmfc = srcb->wmfc;
    if ((wmfc->frameQueued < 0) || !SUCCEEDED(hr)) {
	wmfc->streamEnd = -1;
	goto done;
    }
    if (sample == NULL) {
	if ((streamFlags & MF_SOURCE_READERF_ENDOFSTREAM) ==
	    MF_SOURCE_READERF_ENDOFSTREAM) {
	    wmfc->streamEnd = 1;
	}
	goto done;
    }
    wmfc->counters[0] += 1;
    index = wmfc->frameQueued;
    hr = sample->lpVtbl->ConvertToContiguousBuffer(sample, &mbuf);
    if (SUCCEEDED(hr)) {
	DWORD length = 0, maxLength = 0;
................................................................................
    int capture = (wmfc->async != NULL);
#else
    int capture = (wmfc->tid != NULL);
#endif

    Tcl_DStringSetLength(&wmfc->cbCmd, wmfc->cbCmdLen);
    Tcl_DStringAppendElement(&wmfc->cbCmd, wmfc->devId);
    if (wmfc->streamEnd) {
	Tcl_DStringAppendElement(&wmfc->cbCmd, (wmfc->streamEnd < 0) ?
				 "error" : "eof");
    } else {
	Tcl_DStringAppendElement(&wmfc->cbCmd, capture ? "capture" : "stop");
    }
    Tcl_Preserve((ClientData) interp);
    ret = Tcl_EvalEx(interp, Tcl_DStringValue(&wmfc->cbCmd),
		     Tcl_DStringLength(&wmfc->cbCmd), TCL_EVAL_GLOBAL);
    if (ret != TCL_OK) {
	StopCapture(wmfc);
	Tcl_AddErrorInfo(interp, "\n    (wmf event handler)");
 	Tcl_BackgroundError(interp);
................................................................................
#ifdef USE_ASYNC_HANDLER
	Tcl_AsyncDelete(wmfc->async);
	wmfc->async = NULL;
#else
	wmfc->tid = NULL;
#endif
    }

    if (bufok || dostop) {
	Tcl_CancelIdleCall(ImageCallback, (ClientData) wmfc);
	Tcl_DoWhenIdle(ImageCallback, (ClientData) wmfc);
    }





    return code;
}
 
/*
 *-------------------------------------------------------------------------
 *
 * SetFormat --
 *
 *	Set media source and source reader format given index
 *	which must be an index from the MediaFmts array.
 *
 *-------------------------------------------------------------------------
 */

static HRESULT
SetFormat(IMFMediaSource *mediaSrc, IMFSourceReader *srcReader, int index)
{
................................................................................
    }
    return hr;
}
 
/*
 *-------------------------------------------------------------------------
 *
 * GetFormatList --
 *
 *	Return allocated array of usable formats.

 *
 *-------------------------------------------------------------------------
 */

static MediaFmt *
GetFormatList(IMFMediaSource *mediaSrc, int *numFmtsRet)
{
    IMFPresentationDescriptor *pd = NULL;
    IMFStreamDescriptor *sd = NULL;
    IMFMediaTypeHandler *handler = NULL;
    IMFMediaType *mediaType = NULL;
    MediaFmt *fmts = NULL;
    BOOL selected;
    DWORD count = 0;

    int i, numFmts = 0;
    HRESULT hr;

    hr = mediaSrc->lpVtbl->CreatePresentationDescriptor(mediaSrc, &pd);
    if (!SUCCEEDED(hr)) {
	goto done;
    }
    hr = pd->lpVtbl->GetStreamDescriptorByIndex(pd, 0, &selected, &sd);
................................................................................
    hr = sd->lpVtbl->GetMediaTypeHandler(sd, &handler);
    if (!SUCCEEDED(hr)) {
	goto done;
    }
    hr = handler->lpVtbl->GetMediaTypeCount(handler, &count);
    if (!SUCCEEDED(hr)) {
	goto done;
    }
    fmts = (MediaFmt *) attemptckalloc(sizeof (MediaFmt) * count);
    if (fmts == NULL) {
	goto done;
    }
    for (i = 0; i < count; i++) {
	GUID subType = GUID_NULL;
	UINT64 wval;
	LONG lval;
	int w, h;
	BOOL isCompressed = TRUE;

	hr = handler->lpVtbl->GetMediaTypeByIndex(handler, i, &mediaType);
	if (!SUCCEEDED(hr)) {
	    goto skip;
	}
	mediaType->lpVtbl->IsCompressedFormat(mediaType, &isCompressed);
	if (isCompressed) {
	    goto skip;

	}

	hr = mediaType->lpVtbl->GetGUID(mediaType, &MF_MT_SUBTYPE, &subType);
	if (SUCCEEDED(hr) && ((subType.Data1 == FOURCC_NV12) ||
			      (subType.Data1 == FOURCC_YUY2))) {
	    fmts[numFmts].index = i;
	    fmts[numFmts].fourcc = subType.Data1;
	    wval = 0;
	    hr = mediaType->lpVtbl->GetUINT64(mediaType, &MF_MT_FRAME_SIZE,
					      &wval);
	    if (!SUCCEEDED(hr)) {
		continue;
	    }
	    w = wval >> 32;
	    h = wval;
	    if ((w == 0) || (h == 0)) {
		continue;
	    }
	    fmts[numFmts].width = w;
	    fmts[numFmts].height = h;
	    hr = MFGetStrideForBitmapInfoHeader(subType.Data1, w, &lval);
	    if (!SUCCEEDED(hr)) {
		continue;
	    }
	    fmts[numFmts].stride = lval;
	    wval = 0;
	    hr = mediaType->lpVtbl->GetUINT64(mediaType, &MF_MT_FRAME_RATE,
					      &wval);
	    if (!SUCCEEDED(hr)) {
		continue;
	    }
	    fmts[numFmts].frameRate = wval;
	    fmts[numFmts].frameRateMin = fmts[numFmts].frameRateMax = wval;
	    wval = 0;
	    hr = mediaType->lpVtbl->GetUINT64(mediaType,
					      &MF_MT_FRAME_RATE_RANGE_MIN,
					      &wval);
	    if (SUCCEEDED(hr)) {
		fmts[numFmts].frameRateMin = wval;
	    }
	    wval = 0;
	    hr = mediaType->lpVtbl->GetUINT64(mediaType,
					      &MF_MT_FRAME_RATE_RANGE_MAX,
					      &wval);
	    if (SUCCEEDED(hr)) {
		fmts[numFmts].frameRateMax = wval;
	    }
	    ++numFmts;
	}
skip:
	if (mediaType != NULL) {
	    mediaType->lpVtbl->Release(mediaType);
	    mediaType = NULL;
	}
    }
done:
    if (handler != NULL) {
	handler->lpVtbl->Release(handler);
    }
    if (sd != NULL) {
	sd->lpVtbl->Release(sd);
    }
    if (pd != NULL) {
	pd->lpVtbl->Release(pd);
    }
    if ((numFmts <= 0) && (fmts != NULL)) {
	ckfree((char *) fmts);
	fmts = NULL;
    }
    *numFmtsRet = numFmts;
    return fmts;
}
 
/*
 *-------------------------------------------------------------------------
 *
 * GetFormat --
 *
................................................................................
 *	Get information about the media format (width, height etc.)
 *	and try to switch MJPG source to YUY2 or NV12 format.
 *
 *-------------------------------------------------------------------------
 */

static int
GetFormat(WMFC *wmfc)


{
    HRESULT hr;
    Tcl_Interp *interp = wmfc->interp;
    IMFSourceReader *srcReader = wmfc->srcReader;
    IMFMediaType *mediaType = NULL;
    GUID subType = GUID_NULL;
    LONG lval = 0;

    UINT64 wval = 0;
    UINT32 w = 0, h = 0;

    int result = TCL_ERROR;

    hr = srcReader->lpVtbl->GetCurrentMediaType(srcReader,
		MF_SOURCE_READER_FIRST_VIDEO_STREAM, &mediaType);
    if (!SUCCEEDED(hr)) {
	Tcl_SetResult(interp, "error getting media type from source reader",
		      TCL_STATIC);
	goto done;
    }


    hr = mediaType->lpVtbl->GetGUID(mediaType, &MF_MT_SUBTYPE, &subType);
    if (!SUCCEEDED(hr)) {








	Tcl_SetResult(interp, "error getting media format", TCL_STATIC);

	goto done;
    }























    if ((subType.Data1 != FOURCC_NV12) && (subType.Data1 != FOURCC_YUY2)) {
	Tcl_SetObjResult(interp,
			 Tcl_ObjPrintf("unsupported format code 0x%08lx",
				       subType.Data1));
	goto done;
    }
    wmfc->fourcc = subType.Data1;


    hr = mediaType->lpVtbl->GetUINT64(mediaType, &MF_MT_FRAME_SIZE, &wval);
    if (SUCCEEDED(hr)) {
	w = wval >> 32;
	h = wval;
    }
    if (!SUCCEEDED(hr)) {
	Tcl_SetResult(interp, "error getting frame size", TCL_STATIC);
	goto done;
    }
    hr = MFGetStrideForBitmapInfoHeader(subType.Data1, w, &lval);
    if (!SUCCEEDED(hr)) {
	Tcl_SetResult(interp, "error getting stride", TCL_STATIC);
	goto done;
    }


    wmfc->stride = lval;
    wmfc->width = w;
    wmfc->height = h;












    result = TCL_OK;
done:
    if (mediaType != NULL) {
	mediaType->lpVtbl->Release(mediaType);
    }
    return result;
}
................................................................................
    IMFAttributes *attr = NULL;
    HRESULT hr;
    int doread = 0;

    if (wmfc->srcReader == NULL) {
	hr = MFCreateAttributes(&attr, 1);
	if (!SUCCEEDED(hr)) {
	    Tcl_SetResult(interp, "error creating WMF attributes", TCL_STATIC);
	    return TCL_ERROR;
	}
	wmfc->counters[0] = wmfc->counters[1] = 0;
	wmfc->counters[2] = wmfc->counters[3] = 0;
	wmfc->frame[0].ready = wmfc->frame[1].ready = 0;
	wmfc->streamEnd = 0;
	wmfc->frameReady = wmfc->frameQueued = -1;
	wmfc->srcb.isrcb.lpVtbl = &SourceReaderVtbl;
	wmfc->srcb.refCount = 1;
	wmfc->srcb.wmfc = wmfc;
	hr = attr->lpVtbl->SetUnknown(attr,
				      &MF_SOURCE_READER_ASYNC_CALLBACK,
				      (struct IUnknown *) &wmfc->srcb);
................................................................................
	    attr->lpVtbl->Release(attr);
	}
	if (!SUCCEEDED(hr)) {
	    if (wmfc->srcReader != NULL) {
		wmfc->srcReader->lpVtbl->Release(wmfc->srcReader);
		wmfc->srcReader = NULL;
	    }
	    Tcl_SetResult(interp, "error creating source reader", TCL_STATIC);
	    return TCL_ERROR;
	}
	if (wmfc->useFmt < 0) {
	    wmfc->useFmt = wmfc->fmts[0].index;
	}
	hr = SetFormat(wmfc->mediaSrc, wmfc->srcReader, wmfc->useFmt);


	if (!SUCCEEDED(hr)) {
 	    wmfc->srcReader->lpVtbl->Release(wmfc->srcReader);
	    wmfc->srcReader = NULL;
	    Tcl_SetResult(interp, "error setting media format", TCL_STATIC);
	    return TCL_ERROR;
	}
	if (GetFormat(wmfc) != TCL_OK) {
 	    wmfc->srcReader->lpVtbl->Release(wmfc->srcReader);
	    wmfc->srcReader = NULL;
	    return TCL_ERROR;
	}
    }
    EnterCriticalSection(&wmfc->srcb.lock);
#ifdef USE_ASYNC_HANDLER
................................................................................
#else
    if (wmfc->tid == NULL) {
	wmfc->tid = Tcl_GetCurrentThread();
	doread = 1;
    }
#endif
    if (doread) {
	wmfc->streamEnd = 0;
	wmfc->counters[0] = wmfc->counters[1] = 0;
	wmfc->counters[2] = wmfc->counters[3] = 0;
	wmfc->frameQueued = wmfc->frameReady ? 0 : 1;
	wmfc->frame[wmfc->frameQueued].ready = 0;
	hr = wmfc->srcReader->lpVtbl->ReadSample(wmfc->srcReader,
						 MF_SOURCE_READER_ANY_STREAM,
						 0, NULL, NULL, NULL, NULL);
................................................................................
#endif
	}
    } else {
	hr = S_OK;
    }
    LeaveCriticalSection(&wmfc->srcb.lock);
    if (!SUCCEEDED(hr)) {
	Tcl_SetResult(interp, "error starting read from source reader",
		      TCL_STATIC);
	return TCL_ERROR;
    }
    return TCL_OK;
}
 
/*
................................................................................
 *-------------------------------------------------------------------------
 */

static int
StopCapture(WMFC *wmfc)
{
#ifdef USE_ASYNC_HANDLER


    EnterCriticalSection(&wmfc->srcb.lock);
    if (wmfc->async != NULL) {
        Tcl_AsyncDelete(wmfc->async);
        wmfc->async = NULL;

    }
    wmfc->frameQueued = -1;
    if (wmfc->srcReader != NULL) {
	wmfc->srcReader->lpVtbl->Flush(wmfc->srcReader,
				       MF_SOURCE_READER_ALL_STREAMS);

    }
    LeaveCriticalSection(&wmfc->srcb.lock);
#else
    EnterCriticalSection(&wmfc->srcb.lock);
    wmfc->tid = NULL;
    if (wmfc->streamEnd < 0) {
	wmfc->streamEnd = 0;
    }
    wmfc->frameQueued = -1;
    if (wmfc->srcReader != NULL) {
	wmfc->srcReader->lpVtbl->Flush(wmfc->srcReader,
				       MF_SOURCE_READER_ALL_STREAMS);
    }
    LeaveCriticalSection(&wmfc->srcb.lock);
#endif
    Tcl_CancelIdleCall(ImageCallback, (ClientData) wmfc);
    return TCL_OK;
}
 
/*
 *-------------------------------------------------------------------------
 *
 * GetImage --
................................................................................
{
    WMFI *wmfi = (WMFI *) clientData;
    WMFC *wmfc;
    Tcl_HashEntry *hPtr;
    int ret = TCL_OK, command;

    static const char *cmdNames[] = {
	"close", "counters", "devices", "format", "image",
	"info",	"listformats", "mirror", "open", "orientation",
	"start", "state", "stop", NULL
    };
    enum cmdCode {
	CMD_close, CMD_counters, CMD_devices, CMD_format, CMD_image,
	CMD_info, CMD_listformats, CMD_mirror, CMD_open, CMD_orientation,
	CMD_start, CMD_state, CMD_stop
    };

    if (objc < 2) {
	Tcl_WrongNumArgs(interp, 1, objv, "option ...");
	return TCL_ERROR;
    }
................................................................................
	    ckfree((char *) wmfc->frame[0].data);
	}
	if (wmfc->frame[1].data != NULL) {
	    ckfree((char *) wmfc->frame[1].data);
	}
	Tcl_DStringFree(&wmfc->devName);
	Tcl_DStringFree(&wmfc->cbCmd);
	if (wmfc->fmts != NULL) {
	    ckfree((char *) wmfc->fmts);
	}
	DeleteCriticalSection(&wmfc->srcb.lock);
	ckfree((char *) wmfc);
	break;
    }

    case CMD_counters: {
	if (objc != 3) {
................................................................................
	if (objc != 2) {
	    Tcl_WrongNumArgs(interp, 2, objv, NULL);
	    return TCL_ERROR;
	}
	ret = ListDevices(interp);
	break;
    }

    case CMD_format: {
	if ((objc < 3) || (objc > 4)) {
	    Tcl_WrongNumArgs(interp, 2, objv, "devid ?number?");
	    return TCL_ERROR;
	}
	hPtr = Tcl_FindHashEntry(&wmfi->wmfc, Tcl_GetString(objv[2]));
	if (hPtr == NULL) {
	    goto devNotFound;
	}
	wmfc = (WMFC *) Tcl_GetHashValue(hPtr);
	if (objc > 3) {
	    int i, k, fmtOk = 0, isRunning = 0;

	    if (Tcl_GetIntFromObj(interp, objv[3], &k) != TCL_OK) {
		return TCL_ERROR;
	    }
#ifdef USE_ASYNC_HANDLER
	    isRunning = wmfc->async != NULL;
#else
	    isRunning = wmfc->tid != NULL;
#endif
	    if (isRunning) {
		Tcl_SetResult(interp, "capture still running", TCL_STATIC);
		return TCL_ERROR;
	    }
	    for (i = 0; i < wmfc->numFmts; i++) {
		if (wmfc->fmts[i].index == k) {
		    HRESULT hr;

		    if (wmfc->srcReader == NULL) {
			wmfc->useFmt = k;
			fmtOk = 1;
			break;
		    }
		    hr = SetFormat(wmfc->mediaSrc, wmfc->srcReader, k);
		    if (SUCCEEDED(hr)) {
			if (GetFormat(wmfc) == TCL_OK) {
			    wmfc->useFmt = k;
			    fmtOk = 1;
			} else {
			    fmtOk = -1;
			}
		    } else {
			Tcl_SetObjResult(interp,
				 Tcl_ObjPrintf("set format %d failed", k));
			fmtOk = -1;
		    }
		    break;
		}
	    }
	    if (fmtOk == 0) {
		Tcl_SetObjResult(interp,
				 Tcl_ObjPrintf("format %d not found", k));
	    }
	    ret = (fmtOk <= 0) ? TCL_ERROR : TCL_OK;
	} else {
	    int i = (wmfc->useFmt < 0) ? wmfc->fmts[0].index : wmfc->useFmt;

	    Tcl_SetObjResult(interp, Tcl_NewIntObj(i));
	}
 	break;
    }

    case CMD_image: {
	if ((objc < 3) || (objc > 4)) {
	    Tcl_WrongNumArgs(interp, 2, objv, "devid ?photoImage?");
	    return TCL_ERROR;
	}
	hPtr = Tcl_FindHashEntry(&wmfi->wmfc, Tcl_GetString(objv[2]));
................................................................................
		Tcl_SetObjResult(interp, Tcl_NewListObj(2, r));
	    } else {
		goto devNotFound;
	    }
	}
	break;
    }

    case CMD_listformats: {
	Tcl_Obj *dict;
	int i;

	if ((objc < 3) || (objc % 2 == 0)) {
	    Tcl_WrongNumArgs(interp, 2, objv, "devid ?key value ...?");
	    return TCL_ERROR;
	}
	hPtr = Tcl_FindHashEntry(&wmfi->wmfc, Tcl_GetString(objv[2]));
	if (hPtr == NULL) {
	    goto devNotFound;
	}
	wmfc = (WMFC *) Tcl_GetHashValue(hPtr);
	dict = Tcl_NewDictObj();
	for (i = 0; i < wmfc->numFmts; i++) {
	    Tcl_DString ds;
	    char buffer[64];

	    Tcl_DStringInit(&ds);
	    Tcl_DStringAppendElement(&ds, "frame-size");
	    sprintf(buffer, "%dx%d", wmfc->fmts[i].width,
		    wmfc->fmts[i].height);
	    Tcl_DStringAppendElement(&ds, buffer);
	    Tcl_DStringAppendElement(&ds, "stride");
	    sprintf(buffer, "%d", wmfc->fmts[i].stride);
	    Tcl_DStringAppendElement(&ds, buffer);
	    Tcl_DStringAppendElement(&ds, "fourcc");
	    switch (wmfc->fmts[i].fourcc) {
	    case FOURCC_NV12:
		Tcl_DStringAppendElement(&ds, "NV12");
		break;
	    case FOURCC_YUY2:
		Tcl_DStringAppendElement(&ds, "YUY2");
		break;
	    default:
		Tcl_DStringAppendElement(&ds, "????");
		break;
	    }
	    Tcl_DStringAppendElement(&ds, "frame-rate");
	    sprintf(buffer, "%d/%d", (int) (wmfc->fmts[i].frameRate >> 32),
		    (int) (wmfc->fmts[i].frameRate & 0xffffffff));
	    Tcl_DStringAppendElement(&ds, buffer);
	    Tcl_DStringAppendElement(&ds, "frame-rate-min");
	    sprintf(buffer, "%d/%d", (int) (wmfc->fmts[i].frameRateMin >> 32),
		    (int) (wmfc->fmts[i].frameRateMin & 0xffffffff));
	    Tcl_DStringAppendElement(&ds, buffer);
	    Tcl_DStringAppendElement(&ds, "frame-rate-max");
	    sprintf(buffer, "%d/%d", (int) (wmfc->fmts[i].frameRateMax >> 32),
		    (int) (wmfc->fmts[i].frameRateMax & 0xffffffff));
	    Tcl_DStringAppendElement(&ds, buffer);
	    Tcl_DictObjPut(NULL, dict, Tcl_NewIntObj(wmfc->fmts[i].index),
			   Tcl_NewStringObj(Tcl_DStringValue(&ds),
					    Tcl_DStringLength(&ds)));
	    Tcl_DStringFree(&ds);
	}
	Tcl_SetObjResult(interp, dict);
 	break;
    }

    case CMD_mirror: {
	int x, y;

	if ((objc != 3) && (objc != 5)) {
	    Tcl_WrongNumArgs(interp, 3, objv, "?x y?");
	    return TCL_ERROR;
................................................................................
	    Tcl_SetObjResult(interp, Tcl_NewListObj(2, list));
	}
	break;
    }

    case CMD_open: {
	char *devName;
	int isNew, numFmts = 0;
	IMFMediaSource *mediaSrc;
	Tcl_HashSearch search;
	MediaFmt *fmts = NULL;

	if (objc != 4) {
	    Tcl_WrongNumArgs(interp, 2, objv, "device callback");
	    return TCL_ERROR;
	}
	devName = Tcl_GetString(objv[2]);
	hPtr = Tcl_FirstHashEntry(&wmfi->wmfc, &search);
................................................................................
		return TCL_ERROR;
	    }
	    hPtr = Tcl_NextHashEntry(&search);
	}
	mediaSrc = GetSource(devName);
	if (mediaSrc == NULL) {
	    Tcl_SetObjResult(interp,
		Tcl_ObjPrintf("error opening \"%s\"", devName));
	    return TCL_ERROR;
	}
	fmts = GetFormatList(mediaSrc, &numFmts);
	if (fmts == NULL) {
	    mediaSrc->lpVtbl->Release(mediaSrc);
	    Tcl_SetObjResult(interp,
		Tcl_ObjPrintf("error getting format list for \"%s\"", devName));
	    return TCL_ERROR;
	}
	wmfc = (WMFC *) ckalloc(sizeof (WMFC));
	memset(wmfc, 0, sizeof (WMFC));
	wmfc->mediaSrc = mediaSrc;
	wmfc->srcReader = NULL;
	wmfc->streamEnd = 0;
	wmfc->frameReady = wmfc->frameQueued = -1;
        wmfc->mirror = 0;
        wmfc->rotate = 0;
        wmfc->interp = interp;
	InitializeCriticalSection(&wmfc->srcb.lock);
 	Tcl_DStringInit(&wmfc->devName);
	Tcl_DStringAppend(&wmfc->devName, devName, -1);
	Tcl_DStringInit(&wmfc->cbCmd);
	Tcl_DStringAppend(&wmfc->cbCmd, Tcl_GetString(objv[3]), -1);
	wmfc->useFmt = -1;
	wmfc->numFmts = numFmts;
	wmfc->fmts = fmts;
	wmfc->cbCmdLen = Tcl_DStringLength(&wmfc->cbCmd);
	sprintf(wmfc->devId, "wmfdev%d", wmfi->idCount++);
	hPtr = Tcl_CreateHashEntry(&wmfi->wmfc, wmfc->devId, &isNew);
	Tcl_SetHashValue(hPtr, (ClientData) wmfc);
	Tcl_SetObjResult(interp, Tcl_NewStringObj(wmfc->devId, -1));
	break;
    }
................................................................................
	    }
	} else {
	    Tcl_SetObjResult(interp, Tcl_NewIntObj(wmfc->rotate));
	}
	break;
    }









    case CMD_start: {
	if (objc != 3) {
	    Tcl_WrongNumArgs(interp, 2, objv, "devid");
	    return TCL_ERROR;
	}
	hPtr = Tcl_FindHashEntry(&wmfi->wmfc, Tcl_GetString(objv[2]));
	if (hPtr == NULL) {
................................................................................
	}
	wmfc = (WMFC *) Tcl_GetHashValue(hPtr);
	ret = StartCapture(wmfc);
	break;
    }

    case CMD_state: {
	char *state;

	if (objc != 3) {
	    Tcl_WrongNumArgs(interp, 2, objv, "devid");
	    return TCL_ERROR;
	}
	hPtr = Tcl_FindHashEntry(&wmfi->wmfc, Tcl_GetString(objv[2]));
	if (hPtr == NULL) {
	    goto devNotFound;
	}
	wmfc = (WMFC *) Tcl_GetHashValue(hPtr);
	if (wmfc->streamEnd) {
	    state = (wmfc->streamEnd < 0) ? "error" : "eof";
	} else {
	    state =
#ifdef USE_ASYNC_HANDLER
		(wmfc->async != NULL)
#else
		(wmfc->tid != NULL)
#endif
		? "capture" : "stop";
	}
	Tcl_SetResult(interp, state, TCL_STATIC);
	break;
    }

    case CMD_stop: {
	if (objc != 3) {
	    Tcl_WrongNumArgs(interp, 2, objv, "devid");
	    return TCL_ERROR;