VBoxGuestR3LibVideo.cpp@ 85271

Last change on this file since 85271 was 82968, checked in by vboxsync, 5 years ago
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1	/* $Id: VBoxGuestR3LibVideo.cpp 82968 2020-02-04 10:35:17Z vboxsync $ */
2	/** @file
3	* VBoxGuestR3Lib - Ring-3 Support Library for VirtualBox guest additions, Video.
4	*/
5
6	/*
7	* Copyright (C) 2007-2020 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*
17	* The contents of this file may alternatively be used under the terms
18	* of the Common Development and Distribution License Version 1.0
19	* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20	* VirtualBox OSE distribution, in which case the provisions of the
21	* CDDL are applicable instead of those of the GPL.
22	*
23	* You may elect to license modified versions of this file under the
24	* terms and conditions of either the GPL or the CDDL or both.
25	*/
26
27
28	/*********************************************************************************************************************************
29	* Header Files *
30	*********************************************************************************************************************************/
31	#include "VBoxGuestR3LibInternal.h"
32
33	#include <VBox/log.h>
34	#include <VBox/HostServices/GuestPropertySvc.h> /* For Save and RetrieveVideoMode */
35	#include <iprt/assert.h>
36	#include <iprt/mem.h>
37	#include <iprt/string.h>
38
39	#include <stdio.h>
40
41	#ifdef VBOX_VBGLR3_XFREE86
42	/* Rather than try to resolve all the header file conflicts, I will just
43	prototype what we need here. */
44	extern "C" void* xf86memcpy(void,const void,xf86size_t);
45	# undef memcpy
46	# define memcpy xf86memcpy
47	extern "C" void* xf86memset(const void*,int,xf86size_t);
48	# undef memset
49	# define memset xf86memset
50	#endif /* VBOX_VBGLR3_XFREE86 */
51
52	#define VIDEO_PROP_PREFIX "/VirtualBox/GuestAdd/Vbgl/Video/"
53
54	/**
55	* Enable or disable video acceleration.
56	*
57	* @returns VBox status code.
58	*
59	* @param fEnable Pass zero to disable, any other value to enable.
60	*/
61	VBGLR3DECL(int) VbglR3VideoAccelEnable(bool fEnable)
62	{
63	VMMDevVideoAccelEnable Req;
64	vmmdevInitRequest(&Req.header, VMMDevReq_VideoAccelEnable);
65	Req.u32Enable = fEnable;
66	Req.cbRingBuffer = VMMDEV_VBVA_RING_BUFFER_SIZE;
67	Req.fu32Status = 0;
68	return vbglR3GRPerform(&Req.header);
69	}
70
71
72	/**
73	* Flush the video buffer.
74	*
75	* @returns VBox status code.
76	*/
77	VBGLR3DECL(int) VbglR3VideoAccelFlush(void)
78	{
79	VMMDevVideoAccelFlush Req;
80	vmmdevInitRequest(&Req.header, VMMDevReq_VideoAccelFlush);
81	return vbglR3GRPerform(&Req.header);
82	}
83
84
85	/**
86	* Send mouse pointer shape information to the host.
87	*
88	* @returns VBox status code.
89	*
90	* @param fFlags Mouse pointer flags.
91	* @param xHot X coordinate of hot spot.
92	* @param yHot Y coordinate of hot spot.
93	* @param cx Pointer width.
94	* @param cy Pointer height.
95	* @param pvImg Pointer to the image data (can be NULL).
96	* @param cbImg Size of the image data pointed to by pvImg.
97	*/
98	VBGLR3DECL(int) VbglR3SetPointerShape(uint32_t fFlags, uint32_t xHot, uint32_t yHot, uint32_t cx, uint32_t cy,
99	const void *pvImg, size_t cbImg)
100	{
101	VMMDevReqMousePointer *pReq;
102	size_t cbReq = vmmdevGetMousePointerReqSize(cx, cy);
103	AssertReturn( !pvImg
104	\|\| cbReq == RT_UOFFSETOF(VMMDevReqMousePointer, pointerData) + cbImg,
105	VERR_INVALID_PARAMETER);
106	int rc = vbglR3GRAlloc((VMMDevRequestHeader **)&pReq, cbReq, VMMDevReq_SetPointerShape);
107	if (RT_SUCCESS(rc))
108	{
109	pReq->fFlags = fFlags;
110	pReq->xHot = xHot;
111	pReq->yHot = yHot;
112	pReq->width = cx;
113	pReq->height = cy;
114	if (pvImg)
115	memcpy(pReq->pointerData, pvImg, cbImg);
116
117	rc = vbglR3GRPerform(&pReq->header);
118	if (RT_SUCCESS(rc))
119	rc = pReq->header.rc;
120	vbglR3GRFree(&pReq->header);
121	}
122	return rc;
123	}
124
125
126	/**
127	* Send mouse pointer shape information to the host.
128	* This version of the function accepts a request for clients that
129	* already allocate and manipulate the request structure directly.
130	*
131	* @returns VBox status code.
132	*
133	* @param pReq Pointer to the VMMDevReqMousePointer structure.
134	*/
135	VBGLR3DECL(int) VbglR3SetPointerShapeReq(VMMDevReqMousePointer *pReq)
136	{
137	int rc = vbglR3GRPerform(&pReq->header);
138	if (RT_SUCCESS(rc))
139	rc = pReq->header.rc;
140	return rc;
141	}
142
143
144	/**
145	* Query the last display change request sent from the host to the guest.
146	*
147	* @returns iprt status value
148	* @param pcx Where to store the horizontal pixel resolution
149	* @param pcy Where to store the vertical pixel resolution
150	* requested (a value of zero means do not change).
151	* @param pcBits Where to store the bits per pixel requested (a value
152	* of zero means do not change).
153	* @param piDisplay Where to store the display number the request was for
154	* - 0 for the primary display, 1 for the first
155	* secondary display, etc.
156	* @param fAck whether or not to acknowledge the newest request sent by
157	* the host. If this is set, the function will return the
158	* most recent host request, otherwise it will return the
159	* last request to be acknowledged.
160	*
161	*/
162	static int getDisplayChangeRequest2(uint32_t pcx, uint32_t pcy,
163	uint32_t pcBits, uint32_t piDisplay,
164	bool fAck)
165	{
166	VMMDevDisplayChangeRequest2 Req;
167
168	AssertPtrReturn(pcx, VERR_INVALID_PARAMETER);
169	AssertPtrReturn(pcy, VERR_INVALID_PARAMETER);
170	AssertPtrReturn(pcBits, VERR_INVALID_PARAMETER);
171	AssertPtrReturn(piDisplay, VERR_INVALID_PARAMETER);
172	RT_ZERO(Req);
173	vmmdevInitRequest(&Req.header, VMMDevReq_GetDisplayChangeRequest2);
174	if (fAck)
175	Req.eventAck = VMMDEV_EVENT_DISPLAY_CHANGE_REQUEST;
176	int rc = vbglR3GRPerform(&Req.header);
177	if (RT_SUCCESS(rc))
178	rc = Req.header.rc;
179	if (RT_SUCCESS(rc))
180	{
181	*pcx = Req.xres;
182	*pcy = Req.yres;
183	*pcBits = Req.bpp;
184	*piDisplay = Req.display;
185	}
186	return rc;
187	}
188
189
190	/**
191	* Query the last display change request sent from the host to the guest.
192	*
193	* @returns iprt status value
194	* @param pcx Where to store the horizontal pixel resolution
195	* requested (a value of zero means do not change).
196	* @param pcy Where to store the vertical pixel resolution
197	* requested (a value of zero means do not change).
198	* @param pcBits Where to store the bits per pixel requested (a value
199	* of zero means do not change).
200	* @param piDisplay Where to store the display number the request was for
201	* - 0 for the primary display, 1 for the first
202	* secondary display, etc.
203	* @param fAck whether or not to acknowledge the newest request sent by
204	* the host. If this is set, the function will return the
205	* most recent host request, otherwise it will return the
206	* last request to be acknowledged.
207	*
208	* @param pdx New horizontal position of the secondary monitor.
209	* Optional.
210	* @param pdy New vertical position of the secondary monitor.
211	* Optional.
212	* @param pfEnabled Secondary monitor is enabled or not. Optional.
213	* @param pfChangeOrigin Whether the mode hint retrieved included
214	* information about origin/display offset inside the
215	* frame-buffer. Optional.
216	*
217	*/
218	VBGLR3DECL(int) VbglR3GetDisplayChangeRequest(uint32_t pcx, uint32_t pcy,
219	uint32_t *pcBits,
220	uint32_t *piDisplay,
221	uint32_t pdx, uint32_t pdy,
222	bool *pfEnabled,
223	bool *pfChangeOrigin,
224	bool fAck)
225	{
226	VMMDevDisplayChangeRequestEx Req;
227	int rc = VINF_SUCCESS;
228
229	AssertPtrReturn(pcx, VERR_INVALID_PARAMETER);
230	AssertPtrReturn(pcy, VERR_INVALID_PARAMETER);
231	AssertPtrReturn(pcBits, VERR_INVALID_PARAMETER);
232	AssertPtrNullReturn(pdx, VERR_INVALID_PARAMETER);
233	AssertPtrNullReturn(pdy, VERR_INVALID_PARAMETER);
234	AssertPtrReturn(piDisplay, VERR_INVALID_PARAMETER);
235	AssertPtrNullReturn(pfEnabled, VERR_INVALID_PARAMETER);
236	AssertPtrNullReturn(pfChangeOrigin, VERR_INVALID_PARAMETER);
237
238	RT_ZERO(Req);
239	rc = vmmdevInitRequest(&Req.header, VMMDevReq_GetDisplayChangeRequestEx);
240	AssertRCReturn(rc, rc);
241	if (fAck)
242	Req.eventAck = VMMDEV_EVENT_DISPLAY_CHANGE_REQUEST;
243	rc = vbglR3GRPerform(&Req.header);
244	if (RT_SUCCESS(rc))
245	rc = Req.header.rc;
246	if (RT_SUCCESS(rc))
247	{
248	*pcx = Req.xres;
249	*pcy = Req.yres;
250	*pcBits = Req.bpp;
251	*piDisplay = Req.display;
252	if (pdx)
253	*pdx = Req.cxOrigin;
254	if (pdy)
255	*pdy = Req.cyOrigin;
256	if (pfEnabled)
257	*pfEnabled = Req.fEnabled;
258	if (pfChangeOrigin)
259	*pfChangeOrigin = Req.fChangeOrigin;
260	return VINF_SUCCESS;
261	}
262
263	/* NEEDS TESTING: test below with current Additions on VBox 4.1 or older. */
264	/** @todo Can we find some standard grep-able string for "NEEDS TESTING"? */
265	if (rc == VERR_NOT_IMPLEMENTED) /* Fall back to the old API. */
266	{
267	if (pfEnabled)
268	*pfEnabled = true;
269	if (pfChangeOrigin)
270	*pfChangeOrigin = false;
271	return getDisplayChangeRequest2(pcx, pcy, pcBits, piDisplay, fAck);
272	}
273	return rc;
274	}
275
276
277	/**
278	* Query the last display change request sent from the host to the guest.
279	*
280	* @returns iprt status value
281	* @param cDisplaysIn How many elements in the paDisplays array.
282	* @param pcDisplaysOut How many elements were returned.
283	* @param paDisplays Display information.
284	* @param fAck Whether or not to acknowledge the newest request sent by
285	* the host. If this is set, the function will return the
286	* most recent host request, otherwise it will return the
287	* last request to be acknowledged.
288	*/
289	VBGLR3DECL(int) VbglR3GetDisplayChangeRequestMulti(uint32_t cDisplaysIn,
290	uint32_t *pcDisplaysOut,
291	VMMDevDisplayDef *paDisplays,
292	bool fAck)
293	{
294	VMMDevDisplayChangeRequestMulti *pReq;
295	size_t cbDisplays;
296	size_t cbAlloc;
297	int rc = VINF_SUCCESS;
298
299	AssertReturn(cDisplaysIn > 0 && cDisplaysIn <= 64 /* VBOX_VIDEO_MAX_SCREENS */, VERR_INVALID_PARAMETER);
300	AssertPtrReturn(pcDisplaysOut, VERR_INVALID_PARAMETER);
301	AssertPtrReturn(paDisplays, VERR_INVALID_PARAMETER);
302
303	cbDisplays = cDisplaysIn * sizeof(VMMDevDisplayDef);
304	cbAlloc = RT_UOFFSETOF(VMMDevDisplayChangeRequestMulti, aDisplays) + cbDisplays;
305	pReq = (VMMDevDisplayChangeRequestMulti *)RTMemTmpAlloc(cbAlloc);
306	AssertPtrReturn(pReq, VERR_NO_MEMORY);
307
308	memset(pReq, 0, cbAlloc);
309	rc = vmmdevInitRequest(&pReq->header, VMMDevReq_GetDisplayChangeRequestMulti);
310	AssertRCReturnStmt(rc, RTMemTmpFree(pReq), rc);
311
312	pReq->header.size += (uint32_t)cbDisplays;
313	pReq->cDisplays = cDisplaysIn;
314	if (fAck)
315	pReq->eventAck = VMMDEV_EVENT_DISPLAY_CHANGE_REQUEST;
316
317	rc = vbglR3GRPerform(&pReq->header);
318	AssertRCReturnStmt(rc, RTMemTmpFree(pReq), rc);
319
320	rc = pReq->header.rc;
321	if (RT_SUCCESS(rc))
322	{
323	memcpy(paDisplays, pReq->aDisplays, pReq->cDisplays * sizeof(VMMDevDisplayDef));
324	*pcDisplaysOut = pReq->cDisplays;
325	}
326
327	RTMemTmpFree(pReq);
328	return rc;
329	}
330
331
332	/**
333	* Query the host as to whether it likes a specific video mode.
334	*
335	* @returns the result of the query
336	* @param cx the width of the mode being queried
337	* @param cy the height of the mode being queried
338	* @param cBits the bpp of the mode being queried
339	*/
340	VBGLR3DECL(bool) VbglR3HostLikesVideoMode(uint32_t cx, uint32_t cy, uint32_t cBits)
341	{
342	bool fRc = true; /* If for some reason we can't contact the host then
343	* we like everything. */
344	int rc;
345	VMMDevVideoModeSupportedRequest req;
346
347	vmmdevInitRequest(&req.header, VMMDevReq_VideoModeSupported);
348	req.width = cx;
349	req.height = cy;
350	req.bpp = cBits;
351	req.fSupported = true;
352	rc = vbglR3GRPerform(&req.header);
353	if (RT_SUCCESS(rc) && RT_SUCCESS(req.header.rc))
354	fRc = req.fSupported;
355	return fRc;
356	}
357
358	/**
359	* Get the highest screen number for which there is a saved video mode or "0"
360	* if there are no saved modes.
361	*
362	* @returns iprt status value
363	* @returns VERR_NOT_SUPPORTED if the guest property service is not available.
364	* @param pcScreen where to store the virtual screen number
365	*/
366	VBGLR3DECL(int) VbglR3VideoModeGetHighestSavedScreen(unsigned *pcScreen)
367	{
368	#if defined(VBOX_WITH_GUEST_PROPS)
369	int rc;
370	HGCMCLIENTID idClient = 0;
371	PVBGLR3GUESTPROPENUM pHandle = NULL;
372	const char *pszName = NULL;
373	unsigned cHighestScreen = 0;
374
375	/* Validate input. */
376	AssertPtrReturn(pcScreen, VERR_INVALID_POINTER);
377
378	/* Query the data. */
379	rc = VbglR3GuestPropConnect(&idClient);
380	if (RT_SUCCESS(rc))
381	{
382	const char pszPattern = VIDEO_PROP_PREFIX"";
383	rc = VbglR3GuestPropEnum(idClient, &pszPattern, 1, &pHandle, &pszName, NULL, NULL, NULL);
384	int rc2 = VbglR3GuestPropDisconnect(idClient);
385	if (RT_FAILURE(rc2) && RT_SUCCESS(rc))
386	rc = rc2;
387	}
388
389	/* Process the data. */
390	while (RT_SUCCESS(rc) && pszName != NULL)
391	{
392	uint32_t cScreen;
393
394	rc = RTStrToUInt32Full(pszName + sizeof(VIDEO_PROP_PREFIX) - 1, 10, &cScreen);
395	if (RT_SUCCESS(rc)) /* There may be similar properties with text. */
396	cHighestScreen = RT_MAX(cHighestScreen, cScreen);
397	rc = VbglR3GuestPropEnumNext(pHandle, &pszName, NULL, NULL, NULL);
398	}
399
400	VbglR3GuestPropEnumFree(pHandle);
401
402	/* Return result. */
403	if (RT_SUCCESS(rc))
404	*pcScreen = cHighestScreen;
405	return rc;
406	#else /* !VBOX_WITH_GUEST_PROPS */
407	return VERR_NOT_SUPPORTED;
408	#endif /* !VBOX_WITH_GUEST_PROPS */
409	}
410
411	/**
412	* Save video mode parameters to the guest property store.
413	*
414	* @returns iprt status value
415	* @param idScreen The virtual screen number.
416	* @param cx mode width
417	* @param cy mode height
418	* @param cBits bits per pixel for the mode
419	* @param x virtual screen X offset
420	* @param y virtual screen Y offset
421	* @param fEnabled is this virtual screen enabled?
422	*/
423	VBGLR3DECL(int) VbglR3SaveVideoMode(unsigned idScreen, unsigned cx, unsigned cy, unsigned cBits,
424	unsigned x, unsigned y, bool fEnabled)
425	{
426	#ifdef VBOX_WITH_GUEST_PROPS
427	unsigned cHighestScreen = 0;
428	int rc = VbglR3VideoModeGetHighestSavedScreen(&cHighestScreen);
429	if (RT_SUCCESS(rc))
430	{
431	HGCMCLIENTID idClient = 0;
432	rc = VbglR3GuestPropConnect(&idClient);
433	if (RT_SUCCESS(rc))
434	{
435	int rc2;
436	char szModeName[GUEST_PROP_MAX_NAME_LEN];
437	char szModeParms[GUEST_PROP_MAX_VALUE_LEN];
438	RTStrPrintf(szModeName, sizeof(szModeName), VIDEO_PROP_PREFIX "%u", idScreen);
439	RTStrPrintf(szModeParms, sizeof(szModeParms), "%ux%ux%u,%ux%u,%u", cx, cy, cBits, x, y, (unsigned) fEnabled);
440
441	rc = VbglR3GuestPropWriteValue(idClient, szModeName, szModeParms);
442	/* Write out the mode using the legacy name too, in case the user
443	* re-installs older Additions. */
444	if (idScreen == 0)
445	{
446	RTStrPrintf(szModeParms, sizeof(szModeParms), "%ux%ux%u", cx, cy, cBits);
447	VbglR3GuestPropWriteValue(idClient, VIDEO_PROP_PREFIX "SavedMode", szModeParms);
448	}
449
450	rc2 = VbglR3GuestPropDisconnect(idClient);
451	if (rc != VINF_PERMISSION_DENIED)
452	{
453	if (RT_SUCCESS(rc))
454	rc = rc2;
455	if (RT_SUCCESS(rc))
456	{
457	/* Sanity check 1. We do not try to make allowance for someone else
458	* changing saved settings at the same time as us. */
459	bool fEnabled2 = false;
460	unsigned cx2 = 0;
461	unsigned cy2 = 0;
462	unsigned cBits2 = 0;
463	unsigned x2 = 0;
464	unsigned y2 = 0;
465	rc = VbglR3RetrieveVideoMode(idScreen, &cx2, &cy2, &cBits2, &x2, &y2, &fEnabled2);
466	if ( RT_SUCCESS(rc)
467	&& (cx != cx2 \|\| cy != cy2 \|\| cBits != cBits2 \|\| x != x2 \|\| y != y2 \|\| fEnabled != fEnabled2))
468	rc = VERR_WRITE_ERROR;
469	/* Sanity check 2. Same comment. */
470	else if (RT_SUCCESS(rc))
471	{
472	unsigned cHighestScreen2 = 0;
473	rc = VbglR3VideoModeGetHighestSavedScreen(&cHighestScreen2);
474	if (RT_SUCCESS(rc))
475	if (cHighestScreen2 != RT_MAX(cHighestScreen, idScreen))
476	rc = VERR_INTERNAL_ERROR;
477	}
478	}
479	}
480	}
481	}
482	return rc;
483	#else /* !VBOX_WITH_GUEST_PROPS */
484	return VERR_NOT_SUPPORTED;
485	#endif /* !VBOX_WITH_GUEST_PROPS */
486	}
487
488
489	/**
490	* Retrieve video mode parameters from the guest property store.
491	*
492	* @returns iprt status value
493	* @param idScreen The virtual screen number.
494	* @param pcx where to store the mode width
495	* @param pcy where to store the mode height
496	* @param pcBits where to store the bits per pixel for the mode
497	* @param px where to store the virtual screen X offset
498	* @param py where to store the virtual screen Y offset
499	* @param pfEnabled where to store whether this virtual screen is enabled
500	*/
501	VBGLR3DECL(int) VbglR3RetrieveVideoMode(unsigned idScreen,
502	unsigned pcx, unsigned pcy,
503	unsigned *pcBits,
504	unsigned px, unsigned py,
505	bool *pfEnabled)
506	{
507	#ifdef VBOX_WITH_GUEST_PROPS
508	/*
509	* First we retrieve the video mode which is saved as a string in the
510	* guest property store.
511	*/
512	HGCMCLIENTID idClient = 0;
513	int rc = VbglR3GuestPropConnect(&idClient);
514	if (RT_SUCCESS(rc))
515	{
516	int rc2;
517	/* The buffer for VbglR3GuestPropReadValue. If this is too small then
518	* something is wrong with the data stored in the property. */
519	char szModeParms[1024];
520	char szModeName[GUEST_PROP_MAX_NAME_LEN]; /** @todo add a VbglR3GuestPropReadValueF/FV that does the RTStrPrintf for you. */
521	RTStrPrintf(szModeName, sizeof(szModeName), VIDEO_PROP_PREFIX "%u", idScreen);
522	rc = VbglR3GuestPropReadValue(idClient, szModeName, szModeParms, sizeof(szModeParms), NULL);
523	/* Try legacy single screen name. */
524	if (rc == VERR_NOT_FOUND && idScreen == 0)
525	rc = VbglR3GuestPropReadValue(idClient,
526	VIDEO_PROP_PREFIX"SavedMode",
527	szModeParms, sizeof(szModeParms),
528	NULL);
529	rc2 = VbglR3GuestPropDisconnect(idClient);
530	if (RT_SUCCESS(rc))
531	rc = rc2;
532
533	/*
534	* Now we convert the string returned to numeric values.
535	*/
536	if (RT_SUCCESS(rc))
537	{
538	unsigned cx = 0;
539	unsigned cy = 0;
540	unsigned cBits = 0;
541	unsigned x = 0;
542	unsigned y = 0;
543	unsigned fEnabled = 1;
544	char ch1 = 0;
545	char ch2 = 0;
546	int cMatches = sscanf(szModeParms, "%5ux%5ux%2u%c%5ux%5u,%1u%c", &cx, &cy, &cBits, &ch1, &x, &y, &fEnabled, &ch2);
547	if ( (cMatches == 7 && ch1 == ',')
548	\|\| cMatches == 3)
549	{
550	if (pcx)
551	*pcx = cx;
552	if (pcy)
553	*pcy = cy;
554	if (pcBits)
555	*pcBits = cBits;
556	if (px)
557	*px = x;
558	if (py)
559	*py = y;
560	if (pfEnabled)
561	*pfEnabled = RT_BOOL(fEnabled);
562	rc = VINF_SUCCESS;
563	}
564	else if (cMatches < 0)
565	rc = VERR_READ_ERROR;
566	else
567	rc = VERR_PARSE_ERROR;
568	}
569	}
570
571	return rc;
572	#else /* !VBOX_WITH_GUEST_PROPS */
573	return VERR_NOT_SUPPORTED;
574	#endif /* !VBOX_WITH_GUEST_PROPS */
575	}

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source: vbox/trunk/src/VBox/Additions/common/VBoxGuest/lib/VBoxGuestR3LibVideo.cpp@ 85271

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