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  * Copyright (c) 2014-2017 The strace developers.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. The name of the author may not be used to endorse or promote products
  17  *    derived from this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 #include "defs.h"
  32
  33 #include DEF_MPERS_TYPE(struct_v4l2_buffer)
  34 #include DEF_MPERS_TYPE(struct_v4l2_clip)
  35 #include DEF_MPERS_TYPE(struct_v4l2_create_buffers)
  36 #include DEF_MPERS_TYPE(struct_v4l2_ext_control)
  37 #include DEF_MPERS_TYPE(struct_v4l2_ext_controls)
  38 #include DEF_MPERS_TYPE(struct_v4l2_format)
  39 #include DEF_MPERS_TYPE(struct_v4l2_framebuffer)
  40 #include DEF_MPERS_TYPE(struct_v4l2_input)
  41 #include DEF_MPERS_TYPE(struct_v4l2_standard)
  42
  43 #include <stdint.h>
  44 #include <linux/ioctl.h>
  45 #include <linux/types.h>
  46 #include <linux/videodev2.h>
  47
  48 typedef struct v4l2_buffer struct_v4l2_buffer;
  49 typedef struct v4l2_clip struct_v4l2_clip;
  50 typedef struct v4l2_create_buffers struct_v4l2_create_buffers;
  51 typedef struct v4l2_ext_control struct_v4l2_ext_control;
  52 typedef struct v4l2_ext_controls struct_v4l2_ext_controls;
  53 typedef struct v4l2_format struct_v4l2_format;
  54 typedef struct v4l2_framebuffer struct_v4l2_framebuffer;
  55 typedef struct v4l2_input struct_v4l2_input;
  56 typedef struct v4l2_standard struct_v4l2_standard;
  57
  58 #include MPERS_DEFS
  59
  60 #include "print_fields.h"
  61
  62 /* some historical constants */
  63 #ifndef V4L2_CID_HCENTER
  64 #define V4L2_CID_HCENTER (V4L2_CID_BASE+22)
  65 #endif
  66 #ifndef V4L2_CID_VCENTER
  67 #define V4L2_CID_VCENTER (V4L2_CID_BASE+23)
  68 #endif
  69 #ifndef V4L2_CID_BAND_STOP_FILTER
  70 #define V4L2_CID_BAND_STOP_FILTER (V4L2_CID_BASE+33)
  71 #endif
  72
  73 #define FMT_FRACT "%u/%u"
  74 #define ARGS_FRACT(x) ((x).numerator), ((x).denominator)
  75
  76 #define FMT_RECT "{left=%d, top=%d, width=%u, height=%u}"
  77 #define ARGS_RECT(x) (x).left, (x).top, (x).width, (x).height
  78
  79 static void
  80 print_pixelformat(uint32_t fourcc)
  81 {
  82         const union {
  83                 uint32_t pixelformat;
  84                 unsigned char cc[sizeof(uint32_t)];
  85         } u = {
  86 #if WORDS_BIGENDIAN
  87                 .cc = {
  88                         (unsigned char) (fourcc >> 24),
  89                         (unsigned char) (fourcc >> 16),
  90                         (unsigned char) (fourcc >> 8),
  91                         (unsigned char) fourcc
  92                 }
  93 #else
  94                 .pixelformat = fourcc
  95 #endif
  96         };
  97         unsigned int i;
  98
  99         tprints("v4l2_fourcc(");
 100         for (i = 0; i < sizeof(u.cc); ++i) {
 101                 unsigned char c = u.cc[i];
 102
 103                 if (i)
 104                         tprints(", ");
 105                 if (c == '\'' || c == '\\') {
 106                         char sym[] = {
 107                                 '\'',
 108                                 '\\',
 109                                 c,
 110                                 '\'',
 111                                 '\0'
 112                         };
 113                         tprints(sym);
 114                 } else if (c >= ' ' && c <= 0x7e) {
 115                         char sym[] = {
 116                                 '\'',
 117                                 c,
 118                                 '\'',
 119                                 '\0'
 120                         };
 121                         tprints(sym);
 122                 } else {
 123                         char hex[] = {
 124                                 '\'',
 125                                 '\\',
 126                                 'x',
 127                                 "0123456789abcdef"[c >> 4],
 128                                 "0123456789abcdef"[c & 0xf],
 129                                 '\'',
 130                                 '\0'
 131                         };
 132                         tprints(hex);
 133                 }
 134         }
 135         tprints(")");
 136 }
 137
 138 #include "xlat/v4l2_device_capabilities_flags.h"
 139
 140 static int
 141 print_v4l2_capability(struct tcb *const tcp, const kernel_ulong_t arg)
 142 {
 143         struct v4l2_capability caps;
 144
 145         if (entering(tcp))
 146                 return 0;
 147         tprints(", ");
 148         if (umove_or_printaddr(tcp, arg, &caps))
 149                 return RVAL_IOCTL_DECODED;
 150         PRINT_FIELD_CSTRING("{", caps, driver);
 151         PRINT_FIELD_CSTRING(", ", caps, card);
 152         PRINT_FIELD_CSTRING(", ", caps, bus_info);
 153         tprintf(", version=%u.%u.%u, capabilities=",
 154                 (caps.version >> 16) & 0xFF,
 155                 (caps.version >> 8) & 0xFF,
 156                 caps.version & 0xFF);
 157         printflags(v4l2_device_capabilities_flags, caps.capabilities,
 158                    "V4L2_CAP_???");
 159 #ifdef V4L2_CAP_DEVICE_CAPS
 160         tprints(", device_caps=");
 161         printflags(v4l2_device_capabilities_flags, caps.device_caps,
 162                    "V4L2_CAP_???");
 163 #endif
 164         tprints("}");
 165         return RVAL_IOCTL_DECODED;
 166 }
 167
 168 #include "xlat/v4l2_buf_types.h"
 169 #include "xlat/v4l2_format_description_flags.h"
 170
 171 static int
 172 print_v4l2_fmtdesc(struct tcb *const tcp, const kernel_ulong_t arg)
 173 {
 174         struct v4l2_fmtdesc f;
 175
 176         if (entering(tcp)) {
 177                 tprints(", ");
 178                 if (umove_or_printaddr(tcp, arg, &f))
 179                         return RVAL_IOCTL_DECODED;
 180                 tprintf("{index=%u, type=", f.index);
 181                 printxval(v4l2_buf_types, f.type, "V4L2_BUF_TYPE_???");
 182                 return 0;
 183         }
 184
 185         if (!syserror(tcp) && !umove(tcp, arg, &f)) {
 186                 tprints(", flags=");
 187                 printflags(v4l2_format_description_flags, f.flags,
 188                            "V4L2_FMT_FLAG_???");
 189                 PRINT_FIELD_CSTRING(", ", f, description);
 190                 tprints(", pixelformat=");
 191                 print_pixelformat(f.pixelformat);
 192         }
 193         tprints("}");
 194         return RVAL_IOCTL_DECODED;
 195 }
 196
 197 #include "xlat/v4l2_fields.h"
 198 #include "xlat/v4l2_colorspaces.h"
 199 #include "xlat/v4l2_vbi_flags.h"
 200 #include "xlat/v4l2_sliced_flags.h"
 201
 202 static bool
 203 print_v4l2_clip(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
 204 {
 205         const struct_v4l2_clip *p = elem_buf;
 206         tprintf(FMT_RECT, ARGS_RECT(p->c));
 207         return true;
 208 }
 209
 210 static bool
 211 print_v4l2_format_fmt(struct tcb *const tcp, const char *prefix,
 212                       const struct_v4l2_format *f)
 213 {
 214         bool ret = true;
 215         switch (f->type) {
 216         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 217         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 218                 tprints(prefix);
 219                 tprintf("fmt.pix={width=%u, height=%u, pixelformat=",
 220                         f->fmt.pix.width, f->fmt.pix.height);
 221                 print_pixelformat(f->fmt.pix.pixelformat);
 222                 tprints(", field=");
 223                 printxval(v4l2_fields, f->fmt.pix.field, "V4L2_FIELD_???");
 224                 tprintf(", bytesperline=%u, sizeimage=%u, colorspace=",
 225                         f->fmt.pix.bytesperline, f->fmt.pix.sizeimage);
 226                 printxval(v4l2_colorspaces, f->fmt.pix.colorspace,
 227                           "V4L2_COLORSPACE_???");
 228                 tprints("}");
 229                 break;
 230 #if HAVE_DECL_V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE
 231         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 232         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: {
 233                 unsigned int i, max;
 234
 235                 tprints(prefix);
 236                 tprintf("fmt.pix_mp={width=%u, height=%u, pixelformat=",
 237                         f->fmt.pix_mp.width, f->fmt.pix_mp.height);
 238                 print_pixelformat(f->fmt.pix_mp.pixelformat);
 239                 tprints(", field=");
 240                 printxval(v4l2_fields, f->fmt.pix_mp.field, "V4L2_FIELD_???");
 241                 tprints(", colorspace=");
 242                 printxval(v4l2_colorspaces, f->fmt.pix_mp.colorspace,
 243                           "V4L2_COLORSPACE_???");
 244                 tprints(", plane_fmt=[");
 245                 max = f->fmt.pix_mp.num_planes;
 246                 if (max > VIDEO_MAX_PLANES)
 247                         max = VIDEO_MAX_PLANES;
 248                 for (i = 0; i < max; i++) {
 249                         if (i > 0)
 250                                 tprints(", ");
 251                         tprintf("{sizeimage=%u, bytesperline=%u}",
 252                                 f->fmt.pix_mp.plane_fmt[i].sizeimage,
 253                                 f->fmt.pix_mp.plane_fmt[i].bytesperline);
 254                 }
 255                 tprintf("], num_planes=%u}",
 256                         (unsigned) f->fmt.pix_mp.num_planes);
 257                 break;
 258         }
 259 #endif
 260         /* OUTPUT_OVERLAY since Linux v2.6.22-rc1~1118^2~179 */
 261 #if HAVE_DECL_V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY
 262         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 263 #endif
 264         case V4L2_BUF_TYPE_VIDEO_OVERLAY: {
 265                 struct_v4l2_clip clip;
 266                 tprints(prefix);
 267                 tprintf("fmt.win={left=%d, top=%d, width=%u, height=%u, field=",
 268                         ARGS_RECT(f->fmt.win.w));
 269                 printxval(v4l2_fields, f->fmt.win.field, "V4L2_FIELD_???");
 270                 tprintf(", chromakey=%#x, clips=", f->fmt.win.chromakey);
 271                 ret = print_array(tcp, ptr_to_kulong(f->fmt.win.clips),
 272                                   f->fmt.win.clipcount, &clip, sizeof(clip),
 273                                   umoven_or_printaddr, print_v4l2_clip, 0);
 274                 tprintf(", clipcount=%u, bitmap=", f->fmt.win.clipcount);
 275                 printaddr(ptr_to_kulong(f->fmt.win.bitmap));
 276 #ifdef HAVE_STRUCT_V4L2_WINDOW_GLOBAL_ALPHA
 277                 tprintf(", global_alpha=%#x", f->fmt.win.global_alpha);
 278 #endif
 279                 tprints("}");
 280                 break;
 281         }
 282         case V4L2_BUF_TYPE_VBI_CAPTURE:
 283         case V4L2_BUF_TYPE_VBI_OUTPUT:
 284                 tprints(prefix);
 285                 tprintf("fmt.vbi={sampling_rate=%u, offset=%u, "
 286                         "samples_per_line=%u, sample_format=",
 287                         f->fmt.vbi.sampling_rate, f->fmt.vbi.offset,
 288                         f->fmt.vbi.samples_per_line);
 289                 print_pixelformat(f->fmt.vbi.sample_format);
 290                 tprintf(", start=[%u, %u], count=[%u, %u], ",
 291                         f->fmt.vbi.start[0], f->fmt.vbi.start[1],
 292                         f->fmt.vbi.count[0], f->fmt.vbi.count[1]);
 293                 tprints("flags=");
 294                 printxval(v4l2_vbi_flags, f->fmt.vbi.flags, "V4L2_VBI_???");
 295                 tprints("}");
 296                 break;
 297         /* both since Linux v2.6.14-rc2~64 */
 298 #if HAVE_DECL_V4L2_BUF_TYPE_SLICED_VBI_CAPTURE
 299         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 300         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: {
 301                 unsigned int i, j;
 302
 303                 tprints(prefix);
 304                 tprints("fmt.sliced={service_set=");
 305                 printxval(v4l2_sliced_flags, f->fmt.sliced.service_set,
 306                         "V4L2_SLICED_???");
 307                 tprintf(", io_size=%u, service_lines=[",
 308                         f->fmt.sliced.io_size);
 309                 for (i = 0; i < ARRAY_SIZE(f->fmt.sliced.service_lines); i++) {
 310                         if (i > 0)
 311                                 tprints(", ");
 312                         tprints("[");
 313                         for (j = 0;
 314                              j < ARRAY_SIZE(f->fmt.sliced.service_lines[0]);
 315                              j++) {
 316                                 if (j > 0)
 317                                         tprints(", ");
 318                                 tprintf("%#x",
 319                                         f->fmt.sliced.service_lines[i][j]);
 320                         }
 321                         tprints("]");
 322                 }
 323                 tprints("]}");
 324                 break;
 325         }
 326 #endif
 327         /* since Linux v4.4-rc1~118^2~14 */
 328 #if HAVE_DECL_V4L2_BUF_TYPE_SDR_OUTPUT
 329         case V4L2_BUF_TYPE_SDR_OUTPUT:
 330 #endif
 331         /* since Linux v3.15-rc1~85^2~213 */
 332 #if HAVE_DECL_V4L2_BUF_TYPE_SDR_CAPTURE
 333         case V4L2_BUF_TYPE_SDR_CAPTURE:
 334                 tprints(prefix);
 335                 tprints("fmt.sdr={pixelformat=");
 336                 print_pixelformat(f->fmt.sdr.pixelformat);
 337 #ifdef HAVE_STRUCT_V4L2_SDR_FORMAT_BUFFERSIZE
 338                 tprintf(", buffersize=%u",
 339                         f->fmt.sdr.buffersize);
 340 #endif
 341                 tprints("}");
 342                 break;
 343 #endif
 344         }
 345         return ret;
 346 }
 347
 348 static int
 349 print_v4l2_format(struct tcb *const tcp, const kernel_ulong_t arg,
 350                   const bool is_get)
 351 {
 352         struct_v4l2_format f;
 353
 354         if (entering(tcp)) {
 355                 tprints(", ");
 356                 if (umove_or_printaddr(tcp, arg, &f))
 357                         return RVAL_IOCTL_DECODED;
 358                 tprints("{type=");
 359                 printxval(v4l2_buf_types, f.type, "V4L2_BUF_TYPE_???");
 360                 if (is_get)
 361                         return 0;
 362                 if (!print_v4l2_format_fmt(tcp, ", ", &f)) {
 363                         tprints("}");
 364                         return RVAL_IOCTL_DECODED;
 365                 }
 366
 367                 return 0;
 368         }
 369
 370         if (!syserror(tcp) && !umove(tcp, arg, &f))
 371                 print_v4l2_format_fmt(tcp, is_get ? ", " : " => ", &f);
 372
 373         tprints("}");
 374
 375         return RVAL_IOCTL_DECODED;
 376 }
 377
 378 #include "xlat/v4l2_memories.h"
 379
 380 static int
 381 print_v4l2_requestbuffers(struct tcb *const tcp, const kernel_ulong_t arg)
 382 {
 383         struct v4l2_requestbuffers reqbufs;
 384
 385         if (entering(tcp)) {
 386                 tprints(", ");
 387
 388                 if (umove_or_printaddr(tcp, arg, &reqbufs))
 389                         return RVAL_IOCTL_DECODED;
 390
 391                 tprintf("{type=");
 392                 printxval(v4l2_buf_types, reqbufs.type, "V4L2_BUF_TYPE_???");
 393                 tprints(", memory=");
 394                 printxval(v4l2_memories, reqbufs.memory, "V4L2_MEMORY_???");
 395                 tprintf(", count=%u", reqbufs.count);
 396
 397                 return 0;
 398         }
 399
 400         if (!syserror(tcp)) {
 401                 tprints(" => ");
 402
 403                 if (!umove(tcp, arg, &reqbufs))
 404                         tprintf("%u", reqbufs.count);
 405                 else
 406                         tprints("???");
 407         }
 408
 409         tprints("}");
 410
 411         return RVAL_IOCTL_DECODED;
 412 }
 413
 414 #include "xlat/v4l2_buf_flags.h"
 415
 416 static int
 417 print_v4l2_buffer(struct tcb *const tcp, const unsigned int code,
 418                   const kernel_ulong_t arg)
 419 {
 420         struct_v4l2_buffer b;
 421
 422         if (entering(tcp)) {
 423                 tprints(", ");
 424                 if (umove_or_printaddr(tcp, arg, &b))
 425                         return RVAL_IOCTL_DECODED;
 426                 tprints("{type=");
 427                 printxval(v4l2_buf_types, b.type, "V4L2_BUF_TYPE_???");
 428                 if (code != VIDIOC_DQBUF)
 429                         tprintf(", index=%u", b.index);
 430
 431                 return 0;
 432         }
 433
 434         if (!syserror(tcp) && !umove(tcp, arg, &b)) {
 435                 if (code == VIDIOC_DQBUF)
 436                         tprintf(", index=%u", b.index);
 437                 tprints(", memory=");
 438                 printxval(v4l2_memories, b.memory, "V4L2_MEMORY_???");
 439
 440                 if (b.memory == V4L2_MEMORY_MMAP) {
 441                         tprintf(", m.offset=%#x", b.m.offset);
 442                 } else if (b.memory == V4L2_MEMORY_USERPTR) {
 443                         tprints(", m.userptr=");
 444                         printaddr(b.m.userptr);
 445                 }
 446
 447                 tprintf(", length=%u, bytesused=%u, flags=",
 448                         b.length, b.bytesused);
 449                 printflags(v4l2_buf_flags, b.flags, "V4L2_BUF_FLAG_???");
 450                 if (code == VIDIOC_DQBUF) {
 451                         tprints(", timestamp = ");
 452                         MPERS_FUNC_NAME(print_struct_timeval)(&b.timestamp);
 453                 }
 454                 tprints(", ...");
 455         }
 456
 457         tprints("}");
 458
 459         return RVAL_IOCTL_DECODED;
 460 }
 461
 462 static int
 463 print_v4l2_framebuffer(struct tcb *const tcp, const kernel_ulong_t arg)
 464 {
 465         struct_v4l2_framebuffer b;
 466
 467         tprints(", ");
 468         if (!umove_or_printaddr(tcp, arg, &b)) {
 469                 tprintf("{capability=%#x, flags=%#x, base=",
 470                         b.capability, b.flags);
 471                 printaddr(ptr_to_kulong(b.base));
 472                 tprints("}");
 473         }
 474
 475         return RVAL_IOCTL_DECODED;
 476 }
 477
 478 static int
 479 print_v4l2_buf_type(struct tcb *const tcp, const kernel_ulong_t arg)
 480 {
 481         int type;
 482
 483         tprints(", ");
 484         if (!umove_or_printaddr(tcp, arg, &type)) {
 485                 tprints("[");
 486                 printxval(v4l2_buf_types, type, "V4L2_BUF_TYPE_???");
 487                 tprints("]");
 488         }
 489         return RVAL_IOCTL_DECODED;
 490 }
 491
 492 #include "xlat/v4l2_streaming_capabilities.h"
 493 #include "xlat/v4l2_capture_modes.h"
 494
 495 static int
 496 print_v4l2_streamparm(struct tcb *const tcp, const kernel_ulong_t arg,
 497                       const bool is_get)
 498 {
 499         struct v4l2_streamparm s;
 500
 501         if (entering(tcp)) {
 502                 tprints(", ");
 503                 if (umove_or_printaddr(tcp, arg, &s))
 504                         return RVAL_IOCTL_DECODED;
 505                 tprints("{type=");
 506                 printxval(v4l2_buf_types, s.type, "V4L2_BUF_TYPE_???");
 507                 switch (s.type) {
 508                         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 509                         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 510                                 if (is_get)
 511                                         return 0;
 512                                 tprints(", ");
 513                                 break;
 514                         default:
 515                                 tprints("}");
 516                                 return RVAL_IOCTL_DECODED;
 517                 }
 518         } else {
 519                 if (syserror(tcp) || umove(tcp, arg, &s) < 0) {
 520                         tprints("}");
 521                         return RVAL_IOCTL_DECODED;
 522                 }
 523                 tprints(is_get ? ", " : " => ");
 524         }
 525
 526         if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
 527                 tprints("parm.capture={capability=");
 528                 printflags(v4l2_streaming_capabilities,
 529                            s.parm.capture.capability, "V4L2_CAP_???");
 530
 531                 tprints(", capturemode=");
 532                 printflags(v4l2_capture_modes,
 533                            s.parm.capture.capturemode, "V4L2_MODE_???");
 534
 535                 tprintf(", timeperframe=" FMT_FRACT,
 536                         ARGS_FRACT(s.parm.capture.timeperframe));
 537
 538                 tprintf(", extendedmode=%u, readbuffers=%u}",
 539                         s.parm.capture.extendedmode,
 540                         s.parm.capture.readbuffers);
 541         } else {
 542                 tprints("parm.output={capability=");
 543                 printflags(v4l2_streaming_capabilities,
 544                            s.parm.output.capability, "V4L2_CAP_???");
 545
 546                 tprintf(", outputmode=%u", s.parm.output.outputmode);
 547
 548                 tprintf(", timeperframe=" FMT_FRACT,
 549                         ARGS_FRACT(s.parm.output.timeperframe));
 550
 551                 tprintf(", extendedmode=%u, writebuffers=%u}",
 552                         s.parm.output.extendedmode,
 553                         s.parm.output.writebuffers);
 554         }
 555         if (entering(tcp)) {
 556                 return 0;
 557         } else {
 558                 tprints("}");
 559                 return RVAL_IOCTL_DECODED;
 560         }
 561 }
 562
 563 static int
 564 print_v4l2_standard(struct tcb *const tcp, const kernel_ulong_t arg)
 565 {
 566         struct_v4l2_standard s;
 567
 568         if (entering(tcp)) {
 569                 tprints(", ");
 570                 if (umove_or_printaddr(tcp, arg, &s))
 571                         return RVAL_IOCTL_DECODED;
 572                 tprintf("{index=%u", s.index);
 573
 574                 return 0;
 575         }
 576
 577         if (!syserror(tcp) && !umove(tcp, arg, &s)) {
 578                 PRINT_FIELD_CSTRING(", ", s, name);
 579                 tprintf(", frameperiod=" FMT_FRACT,
 580                         ARGS_FRACT(s.frameperiod));
 581                 tprintf(", framelines=%d", s.framelines);
 582         }
 583
 584         tprints("}");
 585
 586         return RVAL_IOCTL_DECODED;
 587 }
 588
 589 #include "xlat/v4l2_input_types.h"
 590
 591 static int
 592 print_v4l2_input(struct tcb *const tcp, const kernel_ulong_t arg)
 593 {
 594         struct_v4l2_input i;
 595
 596         if (entering(tcp)) {
 597                 tprints(", ");
 598                 if (umove_or_printaddr(tcp, arg, &i))
 599                         return RVAL_IOCTL_DECODED;
 600                 tprintf("{index=%u", i.index);
 601
 602                 return 0;
 603         }
 604
 605         if (!syserror(tcp) && !umove(tcp, arg, &i)) {
 606                 PRINT_FIELD_CSTRING(", ", i, name);
 607                 tprints(", type=");
 608                 printxval(v4l2_input_types, i.type, "V4L2_INPUT_TYPE_???");
 609         }
 610
 611         tprints("}");
 612
 613         return RVAL_IOCTL_DECODED;
 614 }
 615
 616 #include "xlat/v4l2_control_ids.h"
 617
 618 static int
 619 print_v4l2_control(struct tcb *const tcp, const kernel_ulong_t arg,
 620                    const bool is_get)
 621 {
 622         struct v4l2_control c;
 623
 624         if (entering(tcp)) {
 625                 tprints(", ");
 626                 if (umove_or_printaddr(tcp, arg, &c))
 627                         return RVAL_IOCTL_DECODED;
 628                 tprints("{id=");
 629                 printxval(v4l2_control_ids, c.id, "V4L2_CID_???");
 630                 if (!is_get)
 631                         tprintf(", value=%d", c.value);
 632                 return 0;
 633         }
 634
 635         if (!syserror(tcp) && !umove(tcp, arg, &c)) {
 636                 tprints(is_get ? ", " : " => ");
 637                 tprintf("value=%d", c.value);
 638         }
 639
 640         tprints("}");
 641
 642         return RVAL_IOCTL_DECODED;
 643 }
 644
 645 #include "xlat/v4l2_tuner_types.h"
 646 #include "xlat/v4l2_tuner_capabilities.h"
 647 #include "xlat/v4l2_tuner_rxsubchanses.h"
 648 #include "xlat/v4l2_tuner_audmodes.h"
 649
 650 static int
 651 print_v4l2_tuner(struct tcb *const tcp, const kernel_ulong_t arg,
 652                  const bool is_get)
 653 {
 654         struct v4l2_tuner c;
 655         if (entering(tcp)) {
 656                 tprints(", ");
 657                 if (umove_or_printaddr(tcp, arg, &c))
 658                         return RVAL_IOCTL_DECODED;
 659                 tprintf("{index=%u", c.index);
 660                 if (is_get)
 661                         return 0;
 662                 tprints(", ");
 663         } else {
 664                 if (syserror(tcp) || umove(tcp, arg, &c) < 0) {
 665                         tprints("}");
 666                         return RVAL_IOCTL_DECODED;
 667                 }
 668                 tprints(is_get ? ", " : " => ");
 669         }
 670
 671         PRINT_FIELD_CSTRING("", c, name);
 672         tprints(", type=");
 673         printxval(v4l2_tuner_types, c.type, "V4L2_TUNER_TYPE_???");
 674         tprints(", capability=");
 675         printxval(v4l2_tuner_capabilities, c.capability,
 676                   "V4L2_TUNER_CAP_???");
 677         tprintf(", rangelow=%u, rangehigh=%u, rxsubchans=",
 678                 c.rangelow, c.rangehigh);
 679         printxval(v4l2_tuner_rxsubchanses, c.rxsubchans,
 680                   "V4L2_TUNER_SUB_???");
 681         tprints(", audmode=");
 682         printxval(v4l2_tuner_audmodes, c.audmode,
 683                   "V4L2_TUNER_MODE_???");
 684         tprintf(", signal=%d, afc=%d", c.signal, c.afc);
 685
 686         if (entering(tcp)) {
 687                 return 0;
 688         } else {
 689                 tprints("}");
 690                 return RVAL_IOCTL_DECODED;
 691         }
 692 }
 693
 694 #include "xlat/v4l2_control_types.h"
 695 #include "xlat/v4l2_control_flags.h"
 696
 697 static int
 698 print_v4l2_queryctrl(struct tcb *const tcp, const kernel_ulong_t arg)
 699 {
 700         struct v4l2_queryctrl c;
 701
 702         if (entering(tcp)) {
 703                 tprints(", ");
 704                 if (umove_or_printaddr(tcp, arg, &c))
 705                         return RVAL_IOCTL_DECODED;
 706                 tprints("{id=");
 707         } else {
 708                 if (syserror(tcp) || umove(tcp, arg, &c) < 0) {
 709                         tprints("}");
 710                         return RVAL_IOCTL_DECODED;
 711                 }
 712                 if (get_tcb_priv_ulong(tcp))
 713                         tprints(" => ");
 714         }
 715
 716         if (entering(tcp) || get_tcb_priv_ulong(tcp)) {
 717 #ifdef V4L2_CTRL_FLAG_NEXT_CTRL
 718                 const unsigned long next = c.id & V4L2_CTRL_FLAG_NEXT_CTRL;
 719                 set_tcb_priv_ulong(tcp, next);
 720                 if (next) {
 721                         tprints("V4L2_CTRL_FLAG_NEXT_CTRL|");
 722                         c.id &= ~V4L2_CTRL_FLAG_NEXT_CTRL;
 723                 }
 724 #endif
 725                 printxval(v4l2_control_ids, c.id, "V4L2_CID_???");
 726         }
 727
 728         if (exiting(tcp)) {
 729                 tprints(", type=");
 730                 printxval(v4l2_control_types, c.type, "V4L2_CTRL_TYPE_???");
 731                 PRINT_FIELD_CSTRING(", ", c, name);
 732                 tprintf(", minimum=%d, maximum=%d, step=%d"
 733                         ", default_value=%d, flags=",
 734                         c.minimum, c.maximum, c.step, c.default_value);
 735                 printflags(v4l2_control_flags, c.flags, "V4L2_CTRL_FLAG_???");
 736                 tprints("}");
 737         }
 738         return entering(tcp) ? 0 : RVAL_IOCTL_DECODED;
 739 }
 740
 741 static int
 742 print_v4l2_cropcap(struct tcb *const tcp, const kernel_ulong_t arg)
 743 {
 744         struct v4l2_cropcap c;
 745
 746         if (entering(tcp)) {
 747                 tprints(", ");
 748                 if (umove_or_printaddr(tcp, arg, &c))
 749                         return RVAL_IOCTL_DECODED;
 750                 tprints("{type=");
 751                 printxval(v4l2_buf_types, c.type, "V4L2_BUF_TYPE_???");
 752
 753                 return 0;
 754         }
 755
 756         if (!syserror(tcp) && !umove(tcp, arg, &c)) {
 757                 tprintf(", bounds=" FMT_RECT
 758                         ", defrect=" FMT_RECT
 759                         ", pixelaspect=" FMT_FRACT,
 760                         ARGS_RECT(c.bounds),
 761                         ARGS_RECT(c.defrect),
 762                         ARGS_FRACT(c.pixelaspect));
 763         }
 764
 765         tprints("}");
 766
 767         return RVAL_IOCTL_DECODED;
 768 }
 769
 770 static int
 771 print_v4l2_crop(struct tcb *const tcp, const kernel_ulong_t arg,
 772                 const bool is_get)
 773 {
 774         struct v4l2_crop c;
 775
 776         if (entering(tcp)) {
 777                 tprints(", ");
 778                 if (umove_or_printaddr(tcp, arg, &c))
 779                         return RVAL_IOCTL_DECODED;
 780                 tprints("{type=");
 781                 printxval(v4l2_buf_types, c.type, "V4L2_BUF_TYPE_???");
 782                 if (is_get)
 783                         return 0;
 784                 tprintf(", c=" FMT_RECT, ARGS_RECT(c.c));
 785         } else {
 786                 if (!syserror(tcp) && !umove(tcp, arg, &c))
 787                         tprintf(", c=" FMT_RECT, ARGS_RECT(c.c));
 788         }
 789
 790         tprints("}");
 791
 792         return RVAL_IOCTL_DECODED;
 793 }
 794
 795 #ifdef VIDIOC_S_EXT_CTRLS
 796 static bool
 797 print_v4l2_ext_control(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
 798 {
 799         const struct_v4l2_ext_control *p = elem_buf;
 800
 801         tprints("{id=");
 802         printxval(v4l2_control_ids, p->id, "V4L2_CID_???");
 803 # if HAVE_DECL_V4L2_CTRL_TYPE_STRING
 804         tprintf(", size=%u", p->size);
 805         if (p->size > 0) {
 806                 tprints(", string=");
 807                 printstrn(tcp, ptr_to_kulong(p->string), p->size);
 808         } else
 809 # endif
 810         tprintf(", value=%d, value64=%" PRId64, p->value, (int64_t) p->value64);
 811         tprints("}");
 812
 813         return true;
 814 }
 815
 816 #include "xlat/v4l2_control_classes.h"
 817
 818 static int
 819 print_v4l2_ext_controls(struct tcb *const tcp, const kernel_ulong_t arg,
 820                         const bool is_get)
 821 {
 822         struct_v4l2_ext_controls c;
 823
 824         if (entering(tcp)) {
 825                 tprints(", ");
 826                 if (umove_or_printaddr(tcp, arg, &c))
 827                         return RVAL_IOCTL_DECODED;
 828                 tprints("{ctrl_class=");
 829                 printxval(v4l2_control_classes, c.ctrl_class,
 830                           "V4L2_CTRL_CLASS_???");
 831                 tprintf(", count=%u", c.count);
 832                 if (!c.count) {
 833                         tprints("}");
 834                         return RVAL_IOCTL_DECODED;
 835                 }
 836                 if (is_get)
 837                         return 0;
 838                 tprints(", ");
 839         } else {
 840                 if (umove(tcp, arg, &c) < 0) {
 841                         tprints("}");
 842                         return RVAL_IOCTL_DECODED;
 843                 }
 844                 tprints(is_get ? ", " : " => ");
 845         }
 846
 847         tprints("controls=");
 848         struct_v4l2_ext_control ctrl;
 849         bool fail = !print_array(tcp, ptr_to_kulong(c.controls), c.count,
 850                                  &ctrl, sizeof(ctrl),
 851                                  umoven_or_printaddr_ignore_syserror,
 852                                  print_v4l2_ext_control, 0);
 853
 854         if (exiting(tcp) && syserror(tcp))
 855                 tprintf(", error_idx=%u", c.error_idx);
 856
 857         if (exiting(tcp) || fail) {
 858                 tprints("}");
 859                 return RVAL_IOCTL_DECODED;
 860         }
 861
 862         /* entering */
 863         return 0;
 864 }
 865 #endif /* VIDIOC_S_EXT_CTRLS */
 866
 867 #ifdef VIDIOC_ENUM_FRAMESIZES
 868 # include "xlat/v4l2_framesize_types.h"
 869
 870 static int
 871 print_v4l2_frmsizeenum(struct tcb *const tcp, const kernel_ulong_t arg)
 872 {
 873         struct v4l2_frmsizeenum s;
 874
 875         if (entering(tcp)) {
 876                 tprints(", ");
 877                 if (umove_or_printaddr(tcp, arg, &s))
 878                         return RVAL_IOCTL_DECODED;
 879                 tprintf("{index=%u, pixel_format=", s.index);
 880                 print_pixelformat(s.pixel_format);
 881                 return 0;
 882         }
 883
 884         if (!syserror(tcp) && !umove(tcp, arg, &s)) {
 885                 tprints(", type=");
 886                 printxval(v4l2_framesize_types, s.type, "V4L2_FRMSIZE_TYPE_???");
 887                 switch (s.type) {
 888                 case V4L2_FRMSIZE_TYPE_DISCRETE:
 889                         tprintf(", discrete={width=%u, height=%u}",
 890                                 s.discrete.width, s.discrete.height);
 891                         break;
 892                 case V4L2_FRMSIZE_TYPE_STEPWISE:
 893                         tprintf(", stepwise={min_width=%u, max_width=%u, "
 894                                 "step_width=%u, min_height=%u, max_height=%u, "
 895                                 "step_height=%u}",
 896                                 s.stepwise.min_width, s.stepwise.max_width,
 897                                 s.stepwise.step_width, s.stepwise.min_height,
 898                                 s.stepwise.max_height, s.stepwise.step_height);
 899                         break;
 900                 }
 901         }
 902         tprints("}");
 903         return RVAL_IOCTL_DECODED;
 904 }
 905 #endif /* VIDIOC_ENUM_FRAMESIZES */
 906
 907 #ifdef VIDIOC_ENUM_FRAMEINTERVALS
 908 # include "xlat/v4l2_frameinterval_types.h"
 909
 910 static int
 911 print_v4l2_frmivalenum(struct tcb *const tcp, const kernel_ulong_t arg)
 912 {
 913         struct v4l2_frmivalenum f;
 914
 915         if (entering(tcp)) {
 916                 tprints(", ");
 917                 if (umove_or_printaddr(tcp, arg, &f))
 918                         return RVAL_IOCTL_DECODED;
 919                 tprintf("{index=%u, pixel_format=", f.index);
 920                 print_pixelformat(f.pixel_format);
 921                 tprintf(", width=%u, height=%u", f.width, f.height);
 922                 return 0;
 923         }
 924
 925         if (!syserror(tcp) && !umove(tcp, arg, &f)) {
 926                 tprints(", type=");
 927                 printxval(v4l2_frameinterval_types, f.type,
 928                           "V4L2_FRMIVAL_TYPE_???");
 929                 switch (f.type) {
 930                 case V4L2_FRMIVAL_TYPE_DISCRETE:
 931                         tprintf(", discrete=" FMT_FRACT,
 932                                 ARGS_FRACT(f.discrete));
 933                         break;
 934                 case V4L2_FRMIVAL_TYPE_STEPWISE:
 935                 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 936                         tprintf(", stepwise={min=" FMT_FRACT ", max="
 937                                 FMT_FRACT ", step=" FMT_FRACT "}",
 938                                 ARGS_FRACT(f.stepwise.min),
 939                                 ARGS_FRACT(f.stepwise.max),
 940                                 ARGS_FRACT(f.stepwise.step));
 941                         break;
 942                 }
 943         }
 944
 945         tprints("}");
 946
 947         return RVAL_IOCTL_DECODED;
 948 }
 949 #endif /* VIDIOC_ENUM_FRAMEINTERVALS */
 950
 951 #ifdef VIDIOC_CREATE_BUFS
 952 static int
 953 print_v4l2_create_buffers(struct tcb *const tcp, const kernel_ulong_t arg)
 954 {
 955         static const char fmt[] = "{index=%u, count=%u}";
 956         static char outstr[sizeof(fmt) + sizeof(int) * 6];
 957
 958         struct_v4l2_create_buffers b;
 959
 960         if (entering(tcp)) {
 961                 tprints(", ");
 962                 if (umove_or_printaddr(tcp, arg, &b))
 963                         return RVAL_IOCTL_DECODED;
 964                 tprintf("{count=%u, memory=", b.count);
 965                 printxval(v4l2_memories, b.memory, "V4L2_MEMORY_???");
 966                 tprints(", format={type=");
 967                 printxval(v4l2_buf_types, b.format.type,
 968                           "V4L2_BUF_TYPE_???");
 969                 print_v4l2_format_fmt(tcp, ", ",
 970                                       (struct_v4l2_format *) &b.format);
 971                 tprints("}}");
 972                 return 0;
 973         }
 974
 975         if (syserror(tcp) || umove(tcp, arg, &b))
 976                 return RVAL_IOCTL_DECODED;
 977
 978         sprintf(outstr, fmt, b.index, b.count);
 979         tcp->auxstr = outstr;
 980
 981         return RVAL_IOCTL_DECODED | RVAL_STR;
 982 }
 983 #endif /* VIDIOC_CREATE_BUFS */
 984
 985 MPERS_PRINTER_DECL(int, v4l2_ioctl, struct tcb *const tcp,
 986                    const unsigned int code, const kernel_ulong_t arg)
 987 {
 988         if (!verbose(tcp))
 989                 return RVAL_DECODED;
 990
 991         switch (code) {
 992         case VIDIOC_QUERYCAP: /* R */
 993                 return print_v4l2_capability(tcp, arg);
 994
 995         case VIDIOC_ENUM_FMT: /* RW */
 996                 return print_v4l2_fmtdesc(tcp, arg);
 997
 998         case VIDIOC_G_FMT: /* RW */
 999         case VIDIOC_S_FMT: /* RW */
1000         case VIDIOC_TRY_FMT: /* RW */
1001                 return print_v4l2_format(tcp, arg, code == VIDIOC_G_FMT);
1002
1003         case VIDIOC_REQBUFS: /* RW */
1004                 return print_v4l2_requestbuffers(tcp, arg);
1005
1006         case VIDIOC_QUERYBUF: /* RW */
1007         case VIDIOC_QBUF: /* RW */
1008         case VIDIOC_DQBUF: /* RW */
1009                 return print_v4l2_buffer(tcp, code, arg);
1010
1011         case VIDIOC_G_FBUF: /* R */
1012                 if (entering(tcp))
1013                         return 0;
1014                 /* fall through */
1015         case VIDIOC_S_FBUF: /* W */
1016                 return print_v4l2_framebuffer(tcp, arg);
1017
1018         case VIDIOC_STREAMON: /* W */
1019         case VIDIOC_STREAMOFF: /* W */
1020                 return print_v4l2_buf_type(tcp, arg);
1021
1022         case VIDIOC_G_PARM: /* RW */
1023         case VIDIOC_S_PARM: /* RW */
1024                 return print_v4l2_streamparm(tcp, arg, code == VIDIOC_G_PARM);
1025
1026         case VIDIOC_G_STD: /* R */
1027                 if (entering(tcp))
1028                         return 0;
1029                 /* fall through */
1030         case VIDIOC_S_STD: /* W */
1031                 tprints(", ");
1032                 printnum_int64(tcp, arg, "%#" PRIx64);
1033                 break;
1034
1035         case VIDIOC_ENUMSTD: /* RW */
1036                 return print_v4l2_standard(tcp, arg);
1037
1038         case VIDIOC_ENUMINPUT: /* RW */
1039                 return print_v4l2_input(tcp, arg);
1040
1041         case VIDIOC_G_CTRL: /* RW */
1042         case VIDIOC_S_CTRL: /* RW */
1043                 return print_v4l2_control(tcp, arg, code == VIDIOC_G_CTRL);
1044
1045         case VIDIOC_G_TUNER: /* RW */
1046         case VIDIOC_S_TUNER: /* RW */
1047                 return print_v4l2_tuner(tcp, arg, code == VIDIOC_G_TUNER);
1048
1049         case VIDIOC_QUERYCTRL: /* RW */
1050                 return print_v4l2_queryctrl(tcp, arg);
1051
1052         case VIDIOC_G_INPUT: /* R */
1053                 if (entering(tcp))
1054                         return 0;
1055                 /* fall through */
1056         case VIDIOC_S_INPUT: /* RW */
1057                 tprints(", ");
1058                 printnum_int(tcp, arg, "%u");
1059                 break;
1060
1061         case VIDIOC_CROPCAP: /* RW */
1062                 return print_v4l2_cropcap(tcp, arg);
1063
1064         case VIDIOC_G_CROP: /* RW */
1065         case VIDIOC_S_CROP: /* W */
1066                 return print_v4l2_crop(tcp, arg, code == VIDIOC_G_CROP);
1067
1068 #ifdef VIDIOC_S_EXT_CTRLS
1069         case VIDIOC_S_EXT_CTRLS: /* RW */
1070         case VIDIOC_TRY_EXT_CTRLS: /* RW */
1071         case VIDIOC_G_EXT_CTRLS: /* RW */
1072                 return print_v4l2_ext_controls(tcp, arg,
1073                                                code == VIDIOC_G_EXT_CTRLS);
1074 #endif /* VIDIOC_S_EXT_CTRLS */
1075
1076 #ifdef VIDIOC_ENUM_FRAMESIZES
1077         case VIDIOC_ENUM_FRAMESIZES: /* RW */
1078                 return print_v4l2_frmsizeenum(tcp, arg);
1079 #endif /* VIDIOC_ENUM_FRAMESIZES */
1080
1081 #ifdef VIDIOC_ENUM_FRAMEINTERVALS
1082         case VIDIOC_ENUM_FRAMEINTERVALS: /* RW */
1083                 return print_v4l2_frmivalenum(tcp, arg);
1084 #endif /* VIDIOC_ENUM_FRAMEINTERVALS */
1085
1086 #ifdef VIDIOC_CREATE_BUFS
1087         case VIDIOC_CREATE_BUFS: /* RW */
1088                 return print_v4l2_create_buffers(tcp, arg);
1089 #endif /* VIDIOC_CREATE_BUFS */
1090
1091         default:
1092                 return RVAL_DECODED;
1093         }
1094
1095         return RVAL_IOCTL_DECODED;
1096 }