1/*
2 * Copyright (c) 2014 Philippe De Muyter <phdm@macqel.be>
3 * Copyright (c) 2014 William Manley <will@williammanley.net>
4 * Copyright (c) 2011 Peter Zotov <whitequark@whitequark.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 *    derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30#include "defs.h"
31
32#include <stdint.h>
33#include <sys/ioctl.h>
34#include <linux/types.h>
35#include <linux/videodev2.h>
36/* some historical constants */
37#ifndef V4L2_CID_HCENTER
38#define V4L2_CID_HCENTER (V4L2_CID_BASE+22)
39#endif
40#ifndef V4L2_CID_VCENTER
41#define V4L2_CID_VCENTER (V4L2_CID_BASE+23)
42#endif
43#ifndef V4L2_CID_BAND_STOP_FILTER
44#define V4L2_CID_BAND_STOP_FILTER (V4L2_CID_BASE+33)
45#endif
46
47#include "xlat/v4l2_device_capabilities_flags.h"
48#include "xlat/v4l2_buf_types.h"
49#include "xlat/v4l2_buf_flags.h"
50#include "xlat/v4l2_framesize_types.h"
51#include "xlat/v4l2_frameinterval_types.h"
52#include "xlat/v4l2_fields.h"
53#include "xlat/v4l2_colorspaces.h"
54#include "xlat/v4l2_format_description_flags.h"
55#include "xlat/v4l2_memories.h"
56#include "xlat/v4l2_control_ids.h"
57#include "xlat/v4l2_control_types.h"
58#include "xlat/v4l2_control_flags.h"
59#include "xlat/v4l2_control_classes.h"
60#include "xlat/v4l2_streaming_capabilities.h"
61#include "xlat/v4l2_capture_modes.h"
62#include "xlat/v4l2_input_types.h"
63
64#define FMT_FRACT "%u/%u"
65#define ARGS_FRACT(x) ((x).numerator), ((x).denominator)
66
67#define FMT_RECT "{left=%i, top=%i, width=%i, height=%i}"
68#define ARGS_RECT(x) (x).left, (x).top, (x).width, (x).height
69
70static void print_pixelformat(uint32_t fourcc)
71{
72	union {
73		uint32_t pixelformat;
74		unsigned char cc[sizeof(uint32_t)];
75	} u = {
76		.pixelformat =
77#if WORDS_BIGENDIAN
78			htole32(fourcc)
79#else
80			fourcc
81#endif
82	};
83	unsigned int i;
84
85	tprints("v4l2_fourcc(");
86	for (i = 0; i < sizeof(u.cc); ++i) {
87		unsigned int c = u.cc[i];
88
89		if (i)
90			tprints(", ");
91		if (c == ' ' ||
92		    (c >= '0' && c <= '9') ||
93		    (c >= 'A' && c <= 'Z') ||
94		    (c >= 'a' && c <= 'z')) {
95			char sym[] = {
96				'\'',
97				u.cc[i],
98				'\''
99			};
100			tprints(sym);
101		} else {
102			char hex[] = {
103				'\'',
104				'\\',
105				'x',
106				"0123456789abcdef"[c >> 4],
107				"0123456789abcdef"[c & 0xf],
108				'\'',
109				'\0'
110			};
111			tprints(hex);
112		}
113	}
114	tprints(")");
115}
116
117static void print_v4l2_format_fmt(const struct v4l2_format *f)
118{
119	tprints("fmt.");
120	switch (f->type) {
121	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
122	case V4L2_BUF_TYPE_VIDEO_OUTPUT: {
123		const struct v4l2_pix_format *pix = &f->fmt.pix;
124
125		tprintf("pix={width=%u, height=%u, pixelformat=",
126			pix->width, pix->height);
127		print_pixelformat(pix->pixelformat);
128		tprints(", field=");
129		printxval(v4l2_fields, pix->field, "V4L2_FIELD_???");
130		tprintf(", bytesperline=%u, sizeimage=%u, colorspace=",
131			pix->bytesperline, pix->sizeimage);
132		printxval(v4l2_colorspaces, pix->colorspace,
133			  "V4L2_COLORSPACE_???");
134		tprints("}");
135		break;
136	}
137#if HAVE_DECL_V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE
138	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
139	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: {
140		const struct v4l2_pix_format_mplane *pix_mp = &f->fmt.pix_mp;
141		unsigned int i, max;
142
143		tprintf("pix_mp={width=%u, height=%u, pixelformat=",
144			pix_mp->width, pix_mp->height);
145		print_pixelformat(pix_mp->pixelformat);
146		tprints(", field=");
147		printxval(v4l2_fields, pix_mp->field, "V4L2_FIELD_???");
148		tprints(", colorspace=");
149		printxval(v4l2_colorspaces, pix_mp->colorspace,
150			  "V4L2_COLORSPACE_???");
151		tprints("plane_fmt=[");
152		max = pix_mp->num_planes;
153		if (max > VIDEO_MAX_PLANES)
154			max = VIDEO_MAX_PLANES;
155		for (i = 0; i < max; i++) {
156			if (i > 0)
157				tprints(", ");
158			tprintf("{sizeimage=%u, bytesperline=%u}",
159				pix_mp->plane_fmt[i].sizeimage,
160				pix_mp->plane_fmt[i].bytesperline);
161		}
162		tprintf("], num_planes=%u}", (unsigned) pix_mp->num_planes);
163		break;
164	}
165#endif
166
167	/* TODO: Complete this switch statement */
168	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
169#if HAVE_DECL_V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY
170	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
171#endif
172		tprints("win={???}");
173		break;
174
175	case V4L2_BUF_TYPE_VBI_CAPTURE:
176	case V4L2_BUF_TYPE_VBI_OUTPUT:
177		tprints("vbi={???}");
178		break;
179
180	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
181	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
182		tprints("sliced={???}");
183		break;
184
185	default:
186		tprints("???");
187		break;
188	}
189}
190
191int
192v4l2_ioctl(struct tcb *tcp, const unsigned int code, long arg)
193{
194	if (!verbose(tcp))
195		return 0;
196
197	switch (code) {
198	case VIDIOC_QUERYCAP: /* decode on exit */ {
199		struct v4l2_capability caps;
200
201		if (entering(tcp) || syserror(tcp) || umove(tcp, arg, &caps) < 0)
202			return 0;
203		tprints(", {driver=");
204		print_quoted_string((const char *) caps.driver,
205				    sizeof(caps.driver), QUOTE_0_TERMINATED);
206		tprints(", card=");
207		print_quoted_string((const char *) caps.card,
208				    sizeof(caps.card), QUOTE_0_TERMINATED);
209		tprints(", bus_info=");
210		print_quoted_string((const char *) caps.bus_info,
211				    sizeof(caps.bus_info), QUOTE_0_TERMINATED);
212		tprintf(", version=%u.%u.%u, capabilities=",
213			(caps.version >> 16) & 0xFF,
214			(caps.version >> 8) & 0xFF,
215			caps.version & 0xFF);
216		printflags(v4l2_device_capabilities_flags, caps.capabilities,
217			   "V4L2_CAP_???");
218#ifdef V4L2_CAP_DEVICE_CAPS
219		tprints(", device_caps=");
220		printflags(v4l2_device_capabilities_flags, caps.device_caps,
221			   "V4L2_CAP_???");
222#endif
223		tprints("}");
224		return 1;
225	}
226
227#ifdef VIDIOC_ENUM_FRAMESIZES
228	case VIDIOC_ENUM_FRAMESIZES: /* decode on exit */ {
229		struct v4l2_frmsizeenum s;
230
231		if (entering(tcp) || umove(tcp, arg, &s) < 0)
232			return 0;
233		tprintf(", {index=%u, pixel_format=", s.index);
234		print_pixelformat(s.pixel_format);
235
236		if (!syserror(tcp)) {
237			tprints(", type=");
238			printxval(v4l2_framesize_types, s.type, "V4L2_FRMSIZE_TYPE_???");
239			switch (s.type) {
240			case V4L2_FRMSIZE_TYPE_DISCRETE:
241				tprintf(", discrete={width=%u, height=%u}",
242					s.discrete.width, s.discrete.height);
243				break;
244			case V4L2_FRMSIZE_TYPE_STEPWISE:
245				tprintf(", stepwise={min_width=%u, max_width=%u, "
246					"step_width=%u, min_height=%u, max_height=%u, "
247					"step_height=%u}",
248					s.stepwise.min_width, s.stepwise.max_width,
249					s.stepwise.step_width, s.stepwise.min_height,
250					s.stepwise.max_height, s.stepwise.step_height);
251				break;
252			}
253		}
254		tprints("}");
255		return 1;
256	}
257#endif /* VIDIOC_ENUM_FRAMESIZES */
258
259	case VIDIOC_G_FMT:
260	case VIDIOC_S_FMT:
261	case VIDIOC_TRY_FMT: {
262		struct v4l2_format f;
263
264		if (umove(tcp, arg, &f) < 0)
265			return 0;
266		if (entering(tcp)) {
267			tprints(", {type=");
268			printxval(v4l2_buf_types, f.type, "V4L2_BUF_TYPE_???");
269		}
270		if ((entering(tcp) && code != VIDIOC_G_FMT)
271		    || (exiting(tcp) && !syserror(tcp))) {
272			tprints(exiting(tcp) && code != VIDIOC_G_FMT ? " => " : ", ");
273			print_v4l2_format_fmt(&f);
274		}
275		if (exiting(tcp))
276			tprints("}");
277		return 1;
278	}
279
280	case VIDIOC_ENUM_FMT: {
281		struct v4l2_fmtdesc f;
282
283		if (entering(tcp) || umove(tcp, arg, &f) < 0)
284			return 0;
285
286		tprintf(", {index=%u", f.index);
287		if (!syserror(tcp)) {
288			tprints(", type=");
289			printxval(v4l2_buf_types, f.type, "V4L2_BUF_TYPE_???");
290			tprints(", flags=");
291			printflags(v4l2_format_description_flags, f.flags,
292				   "V4L2_FMT_FLAG_???");
293			tprints(", description=");
294			print_quoted_string((const char *) f.description,
295					    sizeof(f.description),
296					    QUOTE_0_TERMINATED);
297			tprints(", pixelformat=");
298			print_pixelformat(f.pixelformat);
299		}
300		tprints("}");
301		return 1;
302	}
303
304	case VIDIOC_G_PARM:
305	case VIDIOC_S_PARM: {
306		struct v4l2_streamparm s;
307
308		if (entering(tcp) && code == VIDIOC_G_PARM)
309			return 1;
310		if (exiting(tcp) && syserror(tcp))
311			return code == VIDIOC_S_PARM;
312		if (umove(tcp, arg, &s) < 0)
313			return 0;
314		if (entering(tcp)) {
315			tprints(", {type=");
316			printxval(v4l2_buf_types, s.type, "V4L2_BUF_TYPE_???");
317		}
318
319		tprints(exiting(tcp) && code == VIDIOC_S_PARM ? " => {" : ", {");
320		if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
321			struct v4l2_captureparm *cap = &s.parm.capture;
322
323			tprints("capability=");
324			printflags(v4l2_streaming_capabilities,
325				   cap->capability, "V4L2_CAP_???");
326
327			tprints(", capturemode=");
328			printflags(v4l2_capture_modes,
329				   cap->capturemode, "V4L2_MODE_???");
330
331			tprintf(", timeperframe=" FMT_FRACT,
332				ARGS_FRACT(cap->timeperframe));
333
334			tprintf(", extendedmode=%u, readbuffers=%u",
335				cap->extendedmode,
336				cap->readbuffers);
337		} else
338			tprints("...");
339		tprints("}");
340		if (exiting(tcp))
341			tprints("}");
342		return 1;
343	}
344
345	case VIDIOC_QUERYCTRL: {
346		struct v4l2_queryctrl c;
347
348		if (umove(tcp, arg, &c) < 0)
349			return 0;
350		/* 'id' field must be printed :
351		* on enter
352		* on exit if !syserror(tcp) && V4L2_CTRL_FLAG_NEXT_CTRL was set
353		*/
354		if (entering(tcp)
355		    || (exiting(tcp) && tcp->auxstr && !syserror(tcp))) {
356			tprints(exiting(tcp) ? " => " : ", {id=");
357#ifdef V4L2_CTRL_FLAG_NEXT_CTRL
358			tcp->auxstr = (c.id & V4L2_CTRL_FLAG_NEXT_CTRL) ? "" : NULL;
359			if (tcp->auxstr) {
360				tprints("V4L2_CTRL_FLAG_NEXT_CTRL|");
361				c.id &= ~V4L2_CTRL_FLAG_NEXT_CTRL;
362			}
363#endif
364			printxval(v4l2_control_ids, c.id, "V4L2_CID_???");
365		}
366		if (exiting(tcp)) {
367			if (!syserror(tcp)) {
368				tprints(", type=");
369				printxval(v4l2_control_types, c.type,
370					  "V4L2_CTRL_TYPE_???");
371				tprints(", name=");
372				print_quoted_string((const char *) c.name,
373						    sizeof(c.name),
374						    QUOTE_0_TERMINATED);
375				tprintf(", minimum=%i, maximum=%i, step=%i, "
376					"default_value=%i, flags=",
377					c.minimum, c.maximum,
378					c.step, c.default_value);
379				printflags(v4l2_control_flags, c.flags,
380					   "V4L2_CTRL_FLAG_???");
381			}
382			tprints("}");
383		}
384		return 1;
385	}
386
387	case VIDIOC_G_CTRL:
388	case VIDIOC_S_CTRL: {
389		struct v4l2_control c;
390
391		if (entering(tcp) || umove(tcp, arg, &c) < 0)
392			return 0;
393		tprints(", {id=");
394		printxval(v4l2_control_ids, c.id, "V4L2_CID_???");
395		if (!syserror(tcp) || code != VIDIOC_G_CTRL)
396			tprintf(", value=%i", c.value);
397		tprints("}");
398		return 1;
399	}
400
401#ifdef VIDIOC_S_EXT_CTRLS
402	case VIDIOC_S_EXT_CTRLS:
403	case VIDIOC_TRY_EXT_CTRLS:
404	case VIDIOC_G_EXT_CTRLS: {
405		struct v4l2_ext_controls c;
406		unsigned int n;
407		bool must_print_values;
408
409		if (entering(tcp) && code == VIDIOC_G_EXT_CTRLS)
410			return 0;
411		if (exiting(tcp) && syserror(tcp) && code != VIDIOC_G_EXT_CTRLS)
412			return 0;
413		must_print_values = ((entering(tcp) && code != VIDIOC_G_EXT_CTRLS)
414				     || (exiting(tcp) && !syserror(tcp)));
415		if (umove(tcp, arg, &c) < 0)
416			return 0;
417		tprints(code != VIDIOC_G_EXT_CTRLS && exiting(tcp) ? " => " : ", ");
418		tprints("{ctrl_class=");
419		printxval(v4l2_control_classes, c.ctrl_class,
420			  "V4L2_CTRL_CLASS_???");
421		tprintf(", count=%u", c.count);
422		if (exiting(tcp) && syserror(tcp))
423			tprintf(", error_idx=%u", c.error_idx);
424		tprints(", controls=[");
425		for (n = 0; n < c.count; ++n) {
426			struct v4l2_ext_control ctrl;
427
428			if (n > 0)
429				tprints(", ");
430			if (umove(tcp, (long) (c.controls + n), &ctrl) < 0)
431				break;
432			if (abbrev(tcp) && n == 2) {
433				tprints("...");
434				break;
435			}
436			tprints("{id=");
437			printxval(v4l2_control_ids, ctrl.id, "V4L2_CID_???");
438# if HAVE_DECL_V4L2_CTRL_TYPE_STRING
439			tprintf(", size=%u", ctrl.size);
440			if (ctrl.size > 0) {
441				if (must_print_values) {
442					tprints(", string=");
443					printstr(tcp, (long) ctrl.string, ctrl.size);
444				}
445			} else
446# endif
447			{
448				if (must_print_values) {
449					tprintf(", value=%i, value64=%lld", ctrl.value,
450						(long long) ctrl.value64);
451				}
452			}
453			tprints("}");
454		}
455		tprints("]}");
456		return 1;
457	}
458#endif /* VIDIOC_S_EXT_CTRLS */
459
460	case VIDIOC_ENUMSTD: {
461		struct v4l2_standard s;
462
463		if (umove(tcp, arg, &s) < 0)
464			return 0;
465		if (entering(tcp))
466			tprintf(", {index=%i", s.index);
467		else {
468			if (!syserror(tcp)) {
469				tprints(", name=");
470				print_quoted_string((const char *) s.name,
471						    sizeof(s.name),
472						    QUOTE_0_TERMINATED);
473				tprintf(", frameperiod=" FMT_FRACT, ARGS_FRACT(s.frameperiod));
474				tprintf(", framelines=%i", s.framelines);
475			}
476			tprints("}");
477		}
478		return 1;
479	}
480
481	case VIDIOC_G_STD:
482	case VIDIOC_S_STD: {
483		v4l2_std_id s;
484
485		if (code == VIDIOC_G_STD && exiting(tcp) && syserror(tcp))
486			return 0;
487		if (umove(tcp, arg, &s) < 0)
488			return 0;
489		if ((code == VIDIOC_S_STD) == entering(tcp))
490			tprintf(", std=%#llx", (unsigned long long) s);
491		return 1;
492	}
493
494	case VIDIOC_ENUMINPUT: {
495		struct v4l2_input i;
496
497		if (entering(tcp) || umove(tcp, arg, &i) < 0)
498			return 0;
499		tprintf(", {index=%i", i.index);
500		if (!syserror(tcp)) {
501			tprints(", name=");
502			print_quoted_string((const char *) i.name,
503					    sizeof(i.name), QUOTE_0_TERMINATED);
504			tprints(", type=");
505			printxval(v4l2_input_types, i.type,
506				  "V4L2_INPUT_TYPE_???");
507		}
508		tprints("}");
509		return 1;
510	}
511
512	case VIDIOC_G_INPUT:
513	case VIDIOC_S_INPUT: {
514		int index;
515
516		if (entering(tcp) || syserror(tcp) || umove(tcp, arg, &index) < 0)
517			return 0;
518
519		tprintf(", index=%i", index);
520		return 1;
521	}
522
523#ifdef VIDIOC_ENUM_FRAMEINTERVALS
524	case VIDIOC_ENUM_FRAMEINTERVALS: {
525		struct v4l2_frmivalenum f;
526
527		if (entering(tcp) || umove(tcp, arg, &f) < 0)
528			return 0;
529		tprintf(", {index=%i, pixel_format=", f.index);
530		print_pixelformat(f.pixel_format);
531		tprintf(", width=%u, height=%u", f.width, f.height);
532		if (!syserror(tcp)) {
533			tprints(", type=");
534			printxval(v4l2_frameinterval_types, f.type,
535				  "V4L2_FRMIVAL_TYPE_???");
536			switch (f.type) {
537			case V4L2_FRMIVAL_TYPE_DISCRETE:
538				tprintf(", discrete=" FMT_FRACT,
539					ARGS_FRACT(f.discrete));
540				break;
541			case V4L2_FRMIVAL_TYPE_STEPWISE:
542			case V4L2_FRMSIZE_TYPE_CONTINUOUS:
543				tprintf(", stepwise={min=" FMT_FRACT ", max="
544					FMT_FRACT ", step=" FMT_FRACT "}",
545					ARGS_FRACT(f.stepwise.min),
546					ARGS_FRACT(f.stepwise.max),
547					ARGS_FRACT(f.stepwise.step));
548				break;
549			}
550		}
551		tprints("}");
552		return 1;
553	}
554#endif /* VIDIOC_ENUM_FRAMEINTERVALS */
555
556	case VIDIOC_CROPCAP: {
557		struct v4l2_cropcap c;
558
559		if (entering(tcp) || umove(tcp, arg, &c) < 0)
560			return 0;
561		tprints(", type=");
562		printxval(v4l2_buf_types, c.type, "V4L2_BUF_TYPE_???");
563		if (syserror(tcp))
564			return 1;
565		tprintf(", bounds=" FMT_RECT ", defrect=" FMT_RECT ", "
566			"pixelaspect=" FMT_FRACT, ARGS_RECT(c.bounds),
567			ARGS_RECT(c.defrect), ARGS_FRACT(c.pixelaspect));
568		return 1;
569	}
570
571	case VIDIOC_G_FBUF:
572	case VIDIOC_S_FBUF: {
573		struct v4l2_framebuffer b;
574
575		if (syserror(tcp) && code == VIDIOC_G_FBUF)
576			return 0;
577		if (entering(tcp) || umove(tcp, arg, &b) < 0)
578			return 0;
579		tprintf(", {capability=%x, flags=%x, base=%p}",
580			b.capability, b.flags, b.base);
581		return 1;
582	}
583
584	case VIDIOC_REQBUFS: {
585		struct v4l2_requestbuffers reqbufs;
586
587		if (umove(tcp, arg, &reqbufs) < 0)
588			return 0;
589		if (entering(tcp)) {
590			tprintf(", {count=%u, type=", reqbufs.count);
591			printxval(v4l2_buf_types, reqbufs.type, "V4L2_BUF_TYPE_???");
592			tprints(", memory=");
593			printxval(v4l2_memories, reqbufs.memory, "V4L2_MEMORY_???");
594			tprints("}");
595			return 1;
596		} else if (syserror(tcp))
597			return 1;
598		else {
599			static char outstr[sizeof("{count=}") + sizeof(int) * 3];
600
601			sprintf(outstr, "{count=%u}", reqbufs.count);
602			tcp->auxstr = outstr;
603			return 1 + RVAL_STR;
604		}
605	}
606
607	case VIDIOC_QUERYBUF:
608	case VIDIOC_QBUF:
609	case VIDIOC_DQBUF: {
610		struct v4l2_buffer b;
611
612		if (umove(tcp, arg, &b) < 0)
613			return 0;
614		if (entering(tcp)) {
615			tprints(", {type=");
616			printxval(v4l2_buf_types, b.type, "V4L2_BUF_TYPE_???");
617			if (code != VIDIOC_DQBUF)
618				tprintf(", index=%u", b.index);
619		} else {
620			if (!syserror(tcp)) {
621				if (code == VIDIOC_DQBUF)
622					tprintf(", index=%u", b.index);
623				tprints(", memory=");
624				printxval(v4l2_memories, b.memory, "V4L2_MEMORY_???");
625
626				if (b.memory == V4L2_MEMORY_MMAP) {
627					tprintf(", m.offset=%#x", b.m.offset);
628				} else if (b.memory == V4L2_MEMORY_USERPTR) {
629					tprintf(", m.userptr=%#lx", b.m.userptr);
630				}
631
632				tprintf(", length=%u, bytesused=%u, flags=",
633					b.length, b.bytesused);
634				printflags(v4l2_buf_flags, b.flags, "V4L2_BUF_FLAG_???");
635				if (code == VIDIOC_DQBUF)
636					tprintf(", timestamp = {%ju.%06ju}",
637						(uintmax_t)b.timestamp.tv_sec,
638						(uintmax_t)b.timestamp.tv_usec);
639				tprints(", ...");
640			}
641			tprints("}");
642		}
643		return 1;
644	}
645
646	case VIDIOC_STREAMON:
647	case VIDIOC_STREAMOFF: {
648		int type;
649
650		if (umove(tcp, arg, &type) < 0)
651			return 0;
652		if (entering(tcp)) {
653			tprints(", ");
654			printxval(v4l2_buf_types, type, "V4L2_BUF_TYPE_???");
655		}
656		return 1;
657	}
658
659	default: /* decode on exit */
660		return 0;
661	}
662}
663