granicus.if.org Git - strace/blob - v4l2.c

   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 DEF_MPERS_TYPE(struct_v4l2_buffer)
  33 #include DEF_MPERS_TYPE(struct_v4l2_create_buffers)
  34 #include DEF_MPERS_TYPE(struct_v4l2_ext_control)
  35 #include DEF_MPERS_TYPE(struct_v4l2_ext_controls)
  36 #include DEF_MPERS_TYPE(struct_v4l2_format)
  37 #include DEF_MPERS_TYPE(struct_v4l2_framebuffer)
  38 #include DEF_MPERS_TYPE(struct_v4l2_input)
  39 #include DEF_MPERS_TYPE(struct_v4l2_standard)
  40
  41 #include <stdint.h>
  42 #include <linux/ioctl.h>
  43 #include <linux/types.h>
  44 #include <linux/videodev2.h>
  45
  46 typedef struct v4l2_buffer struct_v4l2_buffer;
  47 typedef struct v4l2_create_buffers struct_v4l2_create_buffers;
  48 typedef struct v4l2_ext_control struct_v4l2_ext_control;
  49 typedef struct v4l2_ext_controls struct_v4l2_ext_controls;
  50 typedef struct v4l2_format struct_v4l2_format;
  51 typedef struct v4l2_framebuffer struct_v4l2_framebuffer;
  52 typedef struct v4l2_input struct_v4l2_input;
  53 typedef struct v4l2_standard struct_v4l2_standard;
  54
  55 #include MPERS_DEFS
  56
  57 /* some historical constants */
  58 #ifndef V4L2_CID_HCENTER
  59 #define V4L2_CID_HCENTER (V4L2_CID_BASE+22)
  60 #endif
  61 #ifndef V4L2_CID_VCENTER
  62 #define V4L2_CID_VCENTER (V4L2_CID_BASE+23)
  63 #endif
  64 #ifndef V4L2_CID_BAND_STOP_FILTER
  65 #define V4L2_CID_BAND_STOP_FILTER (V4L2_CID_BASE+33)
  66 #endif
  67
  68 #define FMT_FRACT "%u/%u"
  69 #define ARGS_FRACT(x) ((x).numerator), ((x).denominator)
  70
  71 #define FMT_RECT "{left=%d, top=%d, width=%u, height=%u}"
  72 #define ARGS_RECT(x) (x).left, (x).top, (x).width, (x).height
  73
  74 static void
  75 print_pixelformat(uint32_t fourcc)
  76 {
  77         const union {
  78                 uint32_t pixelformat;
  79                 unsigned char cc[sizeof(uint32_t)];
  80         } u = {
  81 #if WORDS_BIGENDIAN
  82                 .cc = {
  83                         (unsigned char) (fourcc >> 24),
  84                         (unsigned char) (fourcc >> 16),
  85                         (unsigned char) (fourcc >> 8),
  86                         (unsigned char) fourcc
  87                 }
  88 #else
  89                 .pixelformat = fourcc
  90 #endif
  91         };
  92         unsigned int i;
  93
  94         tprints("v4l2_fourcc(");
  95         for (i = 0; i < sizeof(u.cc); ++i) {
  96                 unsigned char c = u.cc[i];
  97
  98                 if (i)
  99                         tprints(", ");
 100                 if (c == '\'' || c == '\\') {
 101                         char sym[] = {
 102                                 '\'',
 103                                 '\\',
 104                                 c,
 105                                 '\'',
 106                                 '\0'
 107                         };
 108                         tprints(sym);
 109                 } else if (c >= ' ' && c <= 0x7e) {
 110                         char sym[] = {
 111                                 '\'',
 112                                 c,
 113                                 '\'',
 114                                 '\0'
 115                         };
 116                         tprints(sym);
 117                 } else {
 118                         char hex[] = {
 119                                 '\'',
 120                                 '\\',
 121                                 'x',
 122                                 "0123456789abcdef"[c >> 4],
 123                                 "0123456789abcdef"[c & 0xf],
 124                                 '\'',
 125                                 '\0'
 126                         };
 127                         tprints(hex);
 128                 }
 129         }
 130         tprints(")");
 131 }
 132
 133 #include "xlat/v4l2_device_capabilities_flags.h"
 134
 135 static int
 136 print_v4l2_capability(struct tcb *tcp, const long arg)
 137 {
 138         struct v4l2_capability caps;
 139
 140         if (entering(tcp))
 141                 return 0;
 142         tprints(", ");
 143         if (umove_or_printaddr(tcp, arg, &caps))
 144                 return 1;
 145         tprints("{driver=");
 146         print_quoted_string((const char *) caps.driver,
 147                             sizeof(caps.driver), QUOTE_0_TERMINATED);
 148         tprints(", card=");
 149         print_quoted_string((const char *) caps.card,
 150                             sizeof(caps.card), QUOTE_0_TERMINATED);
 151         tprints(", bus_info=");
 152         print_quoted_string((const char *) caps.bus_info,
 153                             sizeof(caps.bus_info), QUOTE_0_TERMINATED);
 154         tprintf(", version=%u.%u.%u, capabilities=",
 155                 (caps.version >> 16) & 0xFF,
 156                 (caps.version >> 8) & 0xFF,
 157                 caps.version & 0xFF);
 158         printflags(v4l2_device_capabilities_flags, caps.capabilities,
 159                    "V4L2_CAP_???");
 160 #ifdef V4L2_CAP_DEVICE_CAPS
 161         tprints(", device_caps=");
 162         printflags(v4l2_device_capabilities_flags, caps.device_caps,
 163                    "V4L2_CAP_???");
 164 #endif
 165         tprints("}");
 166         return 1;
 167 }
 168
 169 #include "xlat/v4l2_buf_types.h"
 170 #include "xlat/v4l2_format_description_flags.h"
 171
 172 static int
 173 print_v4l2_fmtdesc(struct tcb *tcp, const long arg)
 174 {
 175         struct v4l2_fmtdesc f;
 176
 177         if (entering(tcp)) {
 178                 tprints(", ");
 179                 if (umove_or_printaddr(tcp, arg, &f))
 180                         return RVAL_DECODED | 1;
 181                 tprintf("{index=%u, type=", f.index);
 182                 printxval(v4l2_buf_types, f.type, "V4L2_BUF_TYPE_???");
 183                 return 0;
 184         }
 185
 186         if (!syserror(tcp) && !umove(tcp, arg, &f)) {
 187                 tprints(", flags=");
 188                 printflags(v4l2_format_description_flags, f.flags,
 189                            "V4L2_FMT_FLAG_???");
 190                 tprints(", description=");
 191                 print_quoted_string((const char *) f.description,
 192                                     sizeof(f.description),
 193                                     QUOTE_0_TERMINATED);
 194                 tprints(", pixelformat=");
 195                 print_pixelformat(f.pixelformat);
 196         }
 197         tprints("}");
 198         return 1;
 199 }
 200
 201 #include "xlat/v4l2_fields.h"
 202 #include "xlat/v4l2_colorspaces.h"
 203
 204 static void
 205 print_v4l2_format_fmt(const char *prefix, const struct_v4l2_format *f)
 206 {
 207         switch (f->type) {
 208         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 209         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 210                 tprints(prefix);
 211                 tprintf("fmt.pix={width=%u, height=%u, pixelformat=",
 212                         f->fmt.pix.width, f->fmt.pix.height);
 213                 print_pixelformat(f->fmt.pix.pixelformat);
 214                 tprints(", field=");
 215                 printxval(v4l2_fields, f->fmt.pix.field, "V4L2_FIELD_???");
 216                 tprintf(", bytesperline=%u, sizeimage=%u, colorspace=",
 217                         f->fmt.pix.bytesperline, f->fmt.pix.sizeimage);
 218                 printxval(v4l2_colorspaces, f->fmt.pix.colorspace,
 219                           "V4L2_COLORSPACE_???");
 220                 tprints("}");
 221                 break;
 222 #if HAVE_DECL_V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE
 223         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 224         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: {
 225                 unsigned int i, max;
 226
 227                 tprints(prefix);
 228                 tprintf("fmt.pix_mp={width=%u, height=%u, pixelformat=",
 229                         f->fmt.pix_mp.width, f->fmt.pix_mp.height);
 230                 print_pixelformat(f->fmt.pix_mp.pixelformat);
 231                 tprints(", field=");
 232                 printxval(v4l2_fields, f->fmt.pix_mp.field, "V4L2_FIELD_???");
 233                 tprints(", colorspace=");
 234                 printxval(v4l2_colorspaces, f->fmt.pix_mp.colorspace,
 235                           "V4L2_COLORSPACE_???");
 236                 tprints(", plane_fmt=[");
 237                 max = f->fmt.pix_mp.num_planes;
 238                 if (max > VIDEO_MAX_PLANES)
 239                         max = VIDEO_MAX_PLANES;
 240                 for (i = 0; i < max; i++) {
 241                         if (i > 0)
 242                                 tprints(", ");
 243                         tprintf("{sizeimage=%u, bytesperline=%u}",
 244                                 f->fmt.pix_mp.plane_fmt[i].sizeimage,
 245                                 f->fmt.pix_mp.plane_fmt[i].bytesperline);
 246                 }
 247                 tprintf("], num_planes=%u}", (unsigned) f->fmt.pix_mp.num_planes);
 248                 break;
 249         }
 250 #endif
 251
 252         /* TODO: Complete this switch statement */
 253 #if 0
 254         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 255 #if HAVE_DECL_V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY
 256         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 257 #endif
 258                 tprints(prefix);
 259                 tprints("fmt.win={???}");
 260                 break;
 261
 262         case V4L2_BUF_TYPE_VBI_CAPTURE:
 263         case V4L2_BUF_TYPE_VBI_OUTPUT:
 264                 tprints(prefix);
 265                 tprints("fmt.vbi={???}");
 266                 break;
 267
 268         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 269         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 270                 tprints(prefix);
 271                 tprints("fmt.sliced={???}");
 272                 break;
 273
 274 #if HAVE_DECL_V4L2_BUF_TYPE_SDR_CAPTURE
 275         case V4L2_BUF_TYPE_SDR_CAPTURE:
 276         case V4L2_BUF_TYPE_SDR_OUTPUT:
 277                 tprints(prefix);
 278                 tprints("fmt.sdr={???}");
 279                 break;
 280 #endif
 281 #endif
 282         }
 283 }
 284
 285 static int
 286 print_v4l2_format(struct tcb *tcp, const long arg, const bool is_get)
 287 {
 288         struct_v4l2_format f;
 289
 290         if (entering(tcp)) {
 291                 tprints(", ");
 292                 if (umove_or_printaddr(tcp, arg, &f))
 293                         return RVAL_DECODED | 1;
 294                 tprints("{type=");
 295                 printxval(v4l2_buf_types, f.type, "V4L2_BUF_TYPE_???");
 296                 if (is_get)
 297                         return 0;
 298                 print_v4l2_format_fmt(", ", &f);
 299         } else {
 300                 if (!syserror(tcp) && !umove(tcp, arg, &f)) {
 301                         const char *delim = is_get ? ", " : " => ";
 302                         print_v4l2_format_fmt(delim, &f);
 303                 }
 304                 tprints("}");
 305         }
 306         return 1;
 307 }
 308
 309 #include "xlat/v4l2_memories.h"
 310
 311 static int
 312 print_v4l2_requestbuffers(struct tcb *tcp, const long arg)
 313 {
 314         struct v4l2_requestbuffers reqbufs;
 315
 316         if (entering(tcp)) {
 317                 tprints(", ");
 318                 if (umove_or_printaddr(tcp, arg, &reqbufs))
 319                         return RVAL_DECODED | 1;
 320                 tprintf("{count=%u, type=", reqbufs.count);
 321                 printxval(v4l2_buf_types, reqbufs.type, "V4L2_BUF_TYPE_???");
 322                 tprints(", memory=");
 323                 printxval(v4l2_memories, reqbufs.memory, "V4L2_MEMORY_???");
 324                 tprints("}");
 325                 return 0;
 326         } else {
 327                 static char outstr[sizeof("{count=}") + sizeof(int) * 3];
 328
 329                 if (syserror(tcp) || umove(tcp, arg, &reqbufs) < 0)
 330                         return 1;
 331                 sprintf(outstr, "{count=%u}", reqbufs.count);
 332                 tcp->auxstr = outstr;
 333                 return 1 + RVAL_STR;
 334         }
 335 }
 336
 337 #include "xlat/v4l2_buf_flags.h"
 338
 339 static int
 340 print_v4l2_buffer(struct tcb *tcp, const unsigned int code, const long arg)
 341 {
 342         struct_v4l2_buffer b;
 343
 344         if (entering(tcp)) {
 345                 tprints(", ");
 346                 if (umove_or_printaddr(tcp, arg, &b))
 347                         return RVAL_DECODED | 1;
 348                 tprints("{type=");
 349                 printxval(v4l2_buf_types, b.type, "V4L2_BUF_TYPE_???");
 350                 if (code != VIDIOC_DQBUF)
 351                         tprintf(", index=%u", b.index);
 352         } else {
 353                 if (!syserror(tcp) && umove(tcp, arg, &b) == 0) {
 354                         if (code == VIDIOC_DQBUF)
 355                                 tprintf(", index=%u", b.index);
 356                         tprints(", memory=");
 357                         printxval(v4l2_memories, b.memory, "V4L2_MEMORY_???");
 358
 359                         if (b.memory == V4L2_MEMORY_MMAP) {
 360                                 tprintf(", m.offset=%#x", b.m.offset);
 361                         } else if (b.memory == V4L2_MEMORY_USERPTR) {
 362                                 tprintf(", m.userptr=%#lx",
 363                                         (unsigned long) b.m.userptr);
 364                         }
 365
 366                         tprintf(", length=%u, bytesused=%u, flags=",
 367                                 b.length, b.bytesused);
 368                         printflags(v4l2_buf_flags, b.flags, "V4L2_BUF_FLAG_???");
 369                         if (code == VIDIOC_DQBUF)
 370                                 tprintf(", timestamp = {%ju.%06ju}",
 371                                         (uintmax_t)b.timestamp.tv_sec,
 372                                         (uintmax_t)b.timestamp.tv_usec);
 373                         tprints(", ...");
 374                 }
 375                 tprints("}");
 376         }
 377         return 1;
 378 }
 379
 380 static int
 381 print_v4l2_framebuffer(struct tcb *tcp, const long arg)
 382 {
 383         struct_v4l2_framebuffer b;
 384
 385         tprints(", ");
 386         if (!umove_or_printaddr(tcp, arg, &b)) {
 387                 tprintf("{capability=%#x, flags=%#x, base=%#lx}",
 388                         b.capability, b.flags, (unsigned long) b.base);
 389         }
 390
 391         return RVAL_DECODED | 1;
 392 }
 393
 394 static int
 395 print_v4l2_buf_type(struct tcb *tcp, const long arg)
 396 {
 397         int type;
 398
 399         tprints(", ");
 400         if (!umove_or_printaddr(tcp, arg, &type)) {
 401                 tprints("[");
 402                 printxval(v4l2_buf_types, type, "V4L2_BUF_TYPE_???");
 403                 tprints("]");
 404         }
 405         return RVAL_DECODED | 1;
 406 }
 407
 408 #include "xlat/v4l2_streaming_capabilities.h"
 409 #include "xlat/v4l2_capture_modes.h"
 410
 411 static int
 412 print_v4l2_streamparm(struct tcb *tcp, const long arg, const bool is_get)
 413 {
 414         struct v4l2_streamparm s;
 415
 416         if (entering(tcp)) {
 417                 tprints(", ");
 418                 if (umove_or_printaddr(tcp, arg, &s))
 419                         return RVAL_DECODED | 1;
 420                 tprints("{type=");
 421                 printxval(v4l2_buf_types, s.type, "V4L2_BUF_TYPE_???");
 422                 switch (s.type) {
 423                         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 424                         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 425                                 if (is_get)
 426                                         return 0;
 427                                 tprints(", ");
 428                                 break;
 429                         default:
 430                                 tprints("}");
 431                                 return RVAL_DECODED | 1;
 432                 }
 433         } else {
 434                 if (syserror(tcp) || umove(tcp, arg, &s) < 0) {
 435                         tprints("}");
 436                         return 1;
 437                 }
 438                 tprints(is_get ? ", " : " => ");
 439         }
 440
 441         if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
 442                 tprints("parm.capture={capability=");
 443                 printflags(v4l2_streaming_capabilities,
 444                            s.parm.capture.capability, "V4L2_CAP_???");
 445
 446                 tprints(", capturemode=");
 447                 printflags(v4l2_capture_modes,
 448                            s.parm.capture.capturemode, "V4L2_MODE_???");
 449
 450                 tprintf(", timeperframe=" FMT_FRACT,
 451                         ARGS_FRACT(s.parm.capture.timeperframe));
 452
 453                 tprintf(", extendedmode=%u, readbuffers=%u}",
 454                         s.parm.capture.extendedmode,
 455                         s.parm.capture.readbuffers);
 456         } else {
 457                 tprints("parm.output={capability=");
 458                 printflags(v4l2_streaming_capabilities,
 459                            s.parm.output.capability, "V4L2_CAP_???");
 460
 461                 tprintf(", outputmode=%u", s.parm.output.outputmode);
 462
 463                 tprintf(", timeperframe=" FMT_FRACT,
 464                         ARGS_FRACT(s.parm.output.timeperframe));
 465
 466                 tprintf(", extendedmode=%u, writebuffers=%u}",
 467                         s.parm.output.extendedmode,
 468                         s.parm.output.writebuffers);
 469         }
 470         if (exiting(tcp))
 471                 tprints("}");
 472         return 1;
 473 }
 474
 475 static int
 476 print_v4l2_standard(struct tcb *tcp, const long arg)
 477 {
 478         struct_v4l2_standard s;
 479
 480         if (entering(tcp)) {
 481                 tprints(", ");
 482                 if (umove_or_printaddr(tcp, arg, &s))
 483                         return RVAL_DECODED | 1;
 484                 tprintf("{index=%u", s.index);
 485         } else {
 486                 if (!syserror(tcp) && !umove(tcp, arg, &s)) {
 487                         tprints(", name=");
 488                         print_quoted_string((const char *) s.name,
 489                                             sizeof(s.name),
 490                                             QUOTE_0_TERMINATED);
 491                         tprintf(", frameperiod=" FMT_FRACT,
 492                                 ARGS_FRACT(s.frameperiod));
 493                         tprintf(", framelines=%d", s.framelines);
 494                 }
 495                 tprints("}");
 496         }
 497         return 1;
 498 }
 499
 500 #include "xlat/v4l2_input_types.h"
 501
 502 static int
 503 print_v4l2_input(struct tcb *tcp, const long arg)
 504 {
 505         struct_v4l2_input i;
 506
 507         if (entering(tcp)) {
 508                 tprints(", ");
 509                 if (umove_or_printaddr(tcp, arg, &i))
 510                         return RVAL_DECODED | 1;
 511                 tprintf("{index=%u", i.index);
 512         } else {
 513                 if (!syserror(tcp) && !umove(tcp, arg, &i)) {
 514                         tprints(", name=");
 515                         print_quoted_string((const char *) i.name,
 516                                             sizeof(i.name),
 517                                             QUOTE_0_TERMINATED);
 518                         tprints(", type=");
 519                         printxval(v4l2_input_types, i.type,
 520                                   "V4L2_INPUT_TYPE_???");
 521                 }
 522                 tprints("}");
 523         }
 524         return 1;
 525 }
 526
 527 #include "xlat/v4l2_control_ids.h"
 528
 529 static int
 530 print_v4l2_control(struct tcb *tcp, const long arg, const bool is_get)
 531 {
 532         struct v4l2_control c;
 533
 534         if (entering(tcp)) {
 535                 tprints(", ");
 536                 if (umove_or_printaddr(tcp, arg, &c))
 537                         return RVAL_DECODED | 1;
 538                 tprints("{id=");
 539                 printxval(v4l2_control_ids, c.id, "V4L2_CID_???");
 540                 if (!is_get)
 541                         tprintf(", value=%d", c.value);
 542                 return 0;
 543         }
 544
 545         if (!syserror(tcp) && !umove(tcp, arg, &c)) {
 546                 tprints(is_get ? ", " : " => ");
 547                 tprintf("value=%d", c.value);
 548         }
 549
 550         tprints("}");
 551         return 1;
 552 }
 553
 554 #include "xlat/v4l2_control_types.h"
 555 #include "xlat/v4l2_control_flags.h"
 556
 557 static int
 558 print_v4l2_queryctrl(struct tcb *tcp, const long arg)
 559 {
 560         struct v4l2_queryctrl c;
 561
 562         if (entering(tcp)) {
 563                 tprints(", ");
 564                 if (umove_or_printaddr(tcp, arg, &c))
 565                         return RVAL_DECODED | 1;
 566                 tprints("{id=");
 567         } else {
 568                 if (syserror(tcp) || umove(tcp, arg, &c) < 0) {
 569                         tprints("}");
 570                         return 1;
 571                 }
 572                 if (tcp->auxstr)
 573                         tprints(" => ");
 574         }
 575
 576         if (entering(tcp) || tcp->auxstr) {
 577 #ifdef V4L2_CTRL_FLAG_NEXT_CTRL
 578                 tcp->auxstr = (c.id & V4L2_CTRL_FLAG_NEXT_CTRL) ? "" : NULL;
 579                 if (tcp->auxstr) {
 580                         tprints("V4L2_CTRL_FLAG_NEXT_CTRL|");
 581                         c.id &= ~V4L2_CTRL_FLAG_NEXT_CTRL;
 582                 }
 583 #endif
 584                 printxval(v4l2_control_ids, c.id, "V4L2_CID_???");
 585         }
 586
 587         if (exiting(tcp)) {
 588                 tprints(", type=");
 589                 printxval(v4l2_control_types, c.type, "V4L2_CTRL_TYPE_???");
 590                 tprints(", name=");
 591                 print_quoted_string((const char *) c.name,
 592                                     sizeof(c.name),
 593                                     QUOTE_0_TERMINATED);
 594                 tprintf(", minimum=%d, maximum=%d, step=%d"
 595                         ", default_value=%d, flags=",
 596                         c.minimum, c.maximum, c.step, c.default_value);
 597                 printflags(v4l2_control_flags, c.flags, "V4L2_CTRL_FLAG_???");
 598                 tprints("}");
 599         }
 600         return 1;
 601 }
 602
 603 static int
 604 print_v4l2_cropcap(struct tcb *tcp, const long arg)
 605 {
 606         struct v4l2_cropcap c;
 607
 608         if (entering(tcp)) {
 609                 tprints(", ");
 610                 if (umove_or_printaddr(tcp, arg, &c))
 611                         return RVAL_DECODED | 1;
 612                 tprints("{type=");
 613                 printxval(v4l2_buf_types, c.type, "V4L2_BUF_TYPE_???");
 614                 return 0;
 615         }
 616         if (!syserror(tcp) && !umove(tcp, arg, &c)) {
 617                 tprintf(", bounds=" FMT_RECT
 618                         ", defrect=" FMT_RECT
 619                         ", pixelaspect=" FMT_FRACT,
 620                         ARGS_RECT(c.bounds),
 621                         ARGS_RECT(c.defrect),
 622                         ARGS_FRACT(c.pixelaspect));
 623         }
 624         tprints("}");
 625         return 1;
 626 }
 627
 628 static int
 629 print_v4l2_crop(struct tcb *tcp, const long arg, const bool is_get)
 630 {
 631         struct v4l2_crop c;
 632
 633         if (entering(tcp)) {
 634                 tprints(", ");
 635                 if (umove_or_printaddr(tcp, arg, &c))
 636                         return RVAL_DECODED | 1;
 637                 tprints("{type=");
 638                 printxval(v4l2_buf_types, c.type, "V4L2_BUF_TYPE_???");
 639                 if (is_get)
 640                         return 0;
 641                 tprintf(", c=" FMT_RECT, ARGS_RECT(c.c));
 642         } else {
 643                 if (!syserror(tcp) && !umove(tcp, arg, &c))
 644                         tprintf(", c=" FMT_RECT, ARGS_RECT(c.c));
 645         }
 646
 647         tprints("}");
 648         return RVAL_DECODED | 1;
 649 }
 650
 651 #ifdef VIDIOC_S_EXT_CTRLS
 652 static bool
 653 print_v4l2_ext_control(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
 654 {
 655         const struct_v4l2_ext_control *p = elem_buf;
 656
 657         tprints("{id=");
 658         printxval(v4l2_control_ids, p->id, "V4L2_CID_???");
 659 # if HAVE_DECL_V4L2_CTRL_TYPE_STRING
 660         tprintf(", size=%u", p->size);
 661         if (p->size > 0) {
 662                 tprints(", string=");
 663                 printstr(tcp, (long) p->string, p->size);
 664         } else
 665 # endif
 666         tprintf(", value=%d, value64=%lld", p->value,
 667                 (long long) p->value64);
 668         tprints("}");
 669
 670         return true;
 671 }
 672
 673 #include "xlat/v4l2_control_classes.h"
 674
 675 static int
 676 umoven_or_printaddr_ignore_syserror(struct tcb *tcp, const long addr,
 677                                     const unsigned int len, void *our_addr)
 678 {
 679         if (!addr) {
 680                 tprints("NULL");
 681                 return -1;
 682         }
 683         if (umoven(tcp, addr, len, our_addr) < 0) {
 684                 tprintf("%#lx", addr);
 685                 return -1;
 686         }
 687         return 0;
 688 }
 689
 690 static int
 691 print_v4l2_ext_controls(struct tcb *tcp, const long arg, const bool is_get)
 692 {
 693         struct_v4l2_ext_controls c;
 694
 695         if (entering(tcp)) {
 696                 tprints(", ");
 697                 if (umove_or_printaddr(tcp, arg, &c))
 698                         return RVAL_DECODED | 1;
 699                 tprints("{ctrl_class=");
 700                 printxval(v4l2_control_classes, c.ctrl_class,
 701                           "V4L2_CTRL_CLASS_???");
 702                 tprintf(", count=%u", c.count);
 703                 if (!c.count) {
 704                         tprints("}");
 705                         return RVAL_DECODED | 1;
 706                 }
 707                 if (is_get)
 708                         return 0;
 709                 tprints(", ");
 710         } else {
 711                 if (umove(tcp, arg, &c) < 0) {
 712                         tprints("}");
 713                         return 1;
 714                 }
 715                 tprints(is_get ? ", " : " => ");
 716         }
 717
 718         tprints("controls=");
 719         struct_v4l2_ext_control ctrl;
 720         bool fail = !print_array(tcp, (unsigned long) c.controls, c.count,
 721                                  &ctrl, sizeof(ctrl),
 722                                  umoven_or_printaddr_ignore_syserror,
 723                                  print_v4l2_ext_control, 0);
 724
 725         if (exiting(tcp) && syserror(tcp))
 726                 tprintf(", error_idx=%u", c.error_idx);
 727
 728         if (exiting(tcp) || fail) {
 729                 tprints("}");
 730                 return RVAL_DECODED | 1;
 731         }
 732         return 1;
 733 }
 734 #endif /* VIDIOC_S_EXT_CTRLS */
 735
 736 #ifdef VIDIOC_ENUM_FRAMESIZES
 737 # include "xlat/v4l2_framesize_types.h"
 738
 739 static int
 740 print_v4l2_frmsizeenum(struct tcb *tcp, const long arg)
 741 {
 742         struct v4l2_frmsizeenum s;
 743
 744         if (entering(tcp)) {
 745                 tprints(", ");
 746                 if (umove_or_printaddr(tcp, arg, &s))
 747                         return RVAL_DECODED | 1;
 748                 tprintf("{index=%u, pixel_format=", s.index);
 749                 print_pixelformat(s.pixel_format);
 750                 return 0;
 751         }
 752
 753         if (!syserror(tcp) && !umove(tcp, arg, &s)) {
 754                 tprints(", type=");
 755                 printxval(v4l2_framesize_types, s.type, "V4L2_FRMSIZE_TYPE_???");
 756                 switch (s.type) {
 757                 case V4L2_FRMSIZE_TYPE_DISCRETE:
 758                         tprintf(", discrete={width=%u, height=%u}",
 759                                 s.discrete.width, s.discrete.height);
 760                         break;
 761                 case V4L2_FRMSIZE_TYPE_STEPWISE:
 762                         tprintf(", stepwise={min_width=%u, max_width=%u, "
 763                                 "step_width=%u, min_height=%u, max_height=%u, "
 764                                 "step_height=%u}",
 765                                 s.stepwise.min_width, s.stepwise.max_width,
 766                                 s.stepwise.step_width, s.stepwise.min_height,
 767                                 s.stepwise.max_height, s.stepwise.step_height);
 768                         break;
 769                 }
 770         }
 771         tprints("}");
 772         return 1;
 773 }
 774 #endif /* VIDIOC_ENUM_FRAMESIZES */
 775
 776 #ifdef VIDIOC_ENUM_FRAMEINTERVALS
 777 # include "xlat/v4l2_frameinterval_types.h"
 778
 779 static int
 780 print_v4l2_frmivalenum(struct tcb *tcp, const long arg)
 781 {
 782         struct v4l2_frmivalenum f;
 783
 784         if (entering(tcp)) {
 785                 tprints(", ");
 786                 if (umove_or_printaddr(tcp, arg, &f))
 787                         return RVAL_DECODED | 1;
 788                 tprintf("{index=%u, pixel_format=", f.index);
 789                 print_pixelformat(f.pixel_format);
 790                 tprintf(", width=%u, height=%u", f.width, f.height);
 791                 return 0;
 792         }
 793         if (!syserror(tcp) && !umove(tcp, arg, &f)) {
 794                 tprints(", type=");
 795                 printxval(v4l2_frameinterval_types, f.type,
 796                           "V4L2_FRMIVAL_TYPE_???");
 797                 switch (f.type) {
 798                 case V4L2_FRMIVAL_TYPE_DISCRETE:
 799                         tprintf(", discrete=" FMT_FRACT,
 800                                 ARGS_FRACT(f.discrete));
 801                         break;
 802                 case V4L2_FRMIVAL_TYPE_STEPWISE:
 803                 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 804                         tprintf(", stepwise={min=" FMT_FRACT ", max="
 805                                 FMT_FRACT ", step=" FMT_FRACT "}",
 806                                 ARGS_FRACT(f.stepwise.min),
 807                                 ARGS_FRACT(f.stepwise.max),
 808                                 ARGS_FRACT(f.stepwise.step));
 809                         break;
 810                 }
 811         }
 812         tprints("}");
 813         return 1;
 814 }
 815 #endif /* VIDIOC_ENUM_FRAMEINTERVALS */
 816
 817 #ifdef VIDIOC_CREATE_BUFS
 818 static int
 819 print_v4l2_create_buffers(struct tcb *tcp, const long arg)
 820 {
 821         struct_v4l2_create_buffers b;
 822
 823         if (entering(tcp)) {
 824                 tprints(", ");
 825                 if (umove_or_printaddr(tcp, arg, &b))
 826                         return RVAL_DECODED | 1;
 827                 tprintf("{count=%u, memory=", b.count);
 828                 printxval(v4l2_memories, b.memory, "V4L2_MEMORY_???");
 829                 tprints(", format={type=");
 830                 printxval(v4l2_buf_types, b.format.type,
 831                           "V4L2_BUF_TYPE_???");
 832                 print_v4l2_format_fmt(", ",
 833                                       (struct_v4l2_format *) &b.format);
 834                 tprints("}}");
 835                 return 0;
 836         } else {
 837                 static const char fmt[] = "{index=%u, count=%u}";
 838                 static char outstr[sizeof(fmt) + sizeof(int) * 6];
 839
 840                 if (syserror(tcp) || umove(tcp, arg, &b) < 0)
 841                         return 1;
 842                 sprintf(outstr, fmt, b.index, b.count);
 843                 tcp->auxstr = outstr;
 844                 return 1 + RVAL_STR;
 845         }
 846 }
 847 #endif /* VIDIOC_CREATE_BUFS */
 848
 849 MPERS_PRINTER_DECL(int, v4l2_ioctl,
 850                    struct tcb *tcp, const unsigned int code, const long arg)
 851 {
 852         if (!verbose(tcp))
 853                 return RVAL_DECODED;
 854
 855         switch (code) {
 856         case VIDIOC_QUERYCAP: /* R */
 857                 return print_v4l2_capability(tcp, arg);
 858
 859         case VIDIOC_ENUM_FMT: /* RW */
 860                 return print_v4l2_fmtdesc(tcp, arg);
 861
 862         case VIDIOC_G_FMT: /* RW */
 863         case VIDIOC_S_FMT: /* RW */
 864         case VIDIOC_TRY_FMT: /* RW */
 865                 return print_v4l2_format(tcp, arg, code == VIDIOC_G_FMT);
 866
 867         case VIDIOC_REQBUFS: /* RW */
 868                 return print_v4l2_requestbuffers(tcp, arg);
 869
 870         case VIDIOC_QUERYBUF: /* RW */
 871         case VIDIOC_QBUF: /* RW */
 872         case VIDIOC_DQBUF: /* RW */
 873                 return print_v4l2_buffer(tcp, code, arg);
 874
 875         case VIDIOC_G_FBUF: /* R */
 876                 if (entering(tcp))
 877                         return 0;
 878                 /* fall through */
 879         case VIDIOC_S_FBUF: /* W */
 880                 return print_v4l2_framebuffer(tcp, arg);
 881
 882         case VIDIOC_STREAMON: /* W */
 883         case VIDIOC_STREAMOFF: /* W */
 884                 return print_v4l2_buf_type(tcp, arg);
 885
 886         case VIDIOC_G_PARM: /* RW */
 887         case VIDIOC_S_PARM: /* RW */
 888                 return print_v4l2_streamparm(tcp, arg, code == VIDIOC_G_PARM);
 889
 890         case VIDIOC_G_STD: /* R */
 891                 if (entering(tcp))
 892                         return 0;
 893                 /* fall through */
 894         case VIDIOC_S_STD: /* W */
 895                 tprints(", ");
 896                 printnum_int64(tcp, arg, "%#" PRIx64);
 897                 return RVAL_DECODED | 1;
 898
 899         case VIDIOC_ENUMSTD: /* RW */
 900                 return print_v4l2_standard(tcp, arg);
 901
 902         case VIDIOC_ENUMINPUT: /* RW */
 903                 return print_v4l2_input(tcp, arg);
 904
 905         case VIDIOC_G_CTRL: /* RW */
 906         case VIDIOC_S_CTRL: /* RW */
 907                 return print_v4l2_control(tcp, arg, code == VIDIOC_G_CTRL);
 908
 909         case VIDIOC_QUERYCTRL: /* RW */
 910                 return print_v4l2_queryctrl(tcp, arg);
 911
 912         case VIDIOC_G_INPUT: /* R */
 913                 if (entering(tcp))
 914                         return 0;
 915                 /* fall through */
 916         case VIDIOC_S_INPUT: /* RW */
 917                 tprints(", ");
 918                 printnum_int(tcp, arg, "%u");
 919                 return RVAL_DECODED | 1;
 920
 921         case VIDIOC_CROPCAP: /* RW */
 922                 return print_v4l2_cropcap(tcp, arg);
 923
 924         case VIDIOC_G_CROP: /* RW */
 925         case VIDIOC_S_CROP: /* W */
 926                 return print_v4l2_crop(tcp, arg, code == VIDIOC_G_CROP);
 927
 928 #ifdef VIDIOC_S_EXT_CTRLS
 929         case VIDIOC_S_EXT_CTRLS: /* RW */
 930         case VIDIOC_TRY_EXT_CTRLS: /* RW */
 931         case VIDIOC_G_EXT_CTRLS: /* RW */
 932                 return print_v4l2_ext_controls(tcp, arg,
 933                                                code == VIDIOC_G_EXT_CTRLS);
 934 #endif /* VIDIOC_S_EXT_CTRLS */
 935
 936 #ifdef VIDIOC_ENUM_FRAMESIZES
 937         case VIDIOC_ENUM_FRAMESIZES: /* RW */
 938                 return print_v4l2_frmsizeenum(tcp, arg);
 939 #endif /* VIDIOC_ENUM_FRAMESIZES */
 940
 941 #ifdef VIDIOC_ENUM_FRAMEINTERVALS
 942         case VIDIOC_ENUM_FRAMEINTERVALS: /* RW */
 943                 return print_v4l2_frmivalenum(tcp, arg);
 944 #endif /* VIDIOC_ENUM_FRAMEINTERVALS */
 945
 946 #ifdef VIDIOC_CREATE_BUFS
 947         case VIDIOC_CREATE_BUFS: /* RW */
 948                 return print_v4l2_create_buffers(tcp, arg);
 949 #endif /* VIDIOC_CREATE_BUFS */
 950
 951         default:
 952                 return RVAL_DECODED;
 953         }
 954 }