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) 2014-2018 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 <stdint.h>
  34 #include <linux/ioctl.h>
  35 #include <linux/types.h>
  36 #include <linux/videodev2.h>
  37
  38 #include DEF_MPERS_TYPE(struct_v4l2_buffer)
  39 #include DEF_MPERS_TYPE(struct_v4l2_clip)
  40 #ifdef VIDIOC_CREATE_BUFS
  41 # include DEF_MPERS_TYPE(struct_v4l2_create_buffers)
  42 #endif
  43 #include DEF_MPERS_TYPE(struct_v4l2_ext_control)
  44 #include DEF_MPERS_TYPE(struct_v4l2_ext_controls)
  45 #include DEF_MPERS_TYPE(struct_v4l2_format)
  46 #include DEF_MPERS_TYPE(struct_v4l2_framebuffer)
  47 #include DEF_MPERS_TYPE(struct_v4l2_input)
  48 #include DEF_MPERS_TYPE(struct_v4l2_standard)
  49
  50 typedef struct v4l2_buffer struct_v4l2_buffer;
  51 typedef struct v4l2_clip struct_v4l2_clip;
  52 #ifdef VIDIOC_CREATE_BUFS
  53 typedef struct v4l2_create_buffers struct_v4l2_create_buffers;
  54 #endif
  55 typedef struct v4l2_ext_control struct_v4l2_ext_control;
  56 typedef struct v4l2_ext_controls struct_v4l2_ext_controls;
  57 typedef struct v4l2_format struct_v4l2_format;
  58 typedef struct v4l2_framebuffer struct_v4l2_framebuffer;
  59 typedef struct v4l2_input struct_v4l2_input;
  60 typedef struct v4l2_standard struct_v4l2_standard;
  61
  62 #include MPERS_DEFS
  63
  64 #include "print_fields.h"
  65 #include "xstring.h"
  66
  67 /* v4l2_fourcc_be was added by Linux commit v3.18-rc1~101^2^2~127 */
  68 #ifndef v4l2_fourcc_be
  69 # define v4l2_fourcc_be(a, b, c, d) (v4l2_fourcc(a, b, c, d) | (1 << 31))
  70 #endif
  71
  72 #define FMT_FRACT "%u/%u"
  73 #define ARGS_FRACT(x) ((x).numerator), ((x).denominator)
  74
  75 #define FMT_RECT "{left=%d, top=%d, width=%u, height=%u}"
  76 #define ARGS_RECT(x) (x).left, (x).top, (x).width, (x).height
  77
  78 #include "xlat/v4l2_pix_fmts.h"
  79 #include "xlat/v4l2_sdr_fmts.h"
  80
  81 static void
  82 print_pixelformat(uint32_t fourcc, const struct xlat *xlat)
  83 {
  84         unsigned char a[] = {
  85                 (unsigned char) fourcc,
  86                 (unsigned char) (fourcc >> 8),
  87                 (unsigned char) (fourcc >> 16),
  88                 (unsigned char) (fourcc >> 24),
  89         };
  90         unsigned int i;
  91
  92         tprints("v4l2_fourcc(");
  93         for (i = 0; i < ARRAY_SIZE(a); ++i) {
  94                 unsigned char c = a[i];
  95
  96                 if (i)
  97                         tprints(", ");
  98                 if (c == '\'' || c == '\\') {
  99                         char sym[] = {
 100                                 '\'',
 101                                 '\\',
 102                                 c,
 103                                 '\'',
 104                                 '\0'
 105                         };
 106                         tprints(sym);
 107                 } else if (c >= ' ' && c <= 0x7e) {
 108                         char sym[] = {
 109                                 '\'',
 110                                 c,
 111                                 '\'',
 112                                 '\0'
 113                         };
 114                         tprints(sym);
 115                 } else {
 116                         char hex[] = {
 117                                 '\'',
 118                                 '\\',
 119                                 'x',
 120                                 "0123456789abcdef"[c >> 4],
 121                                 "0123456789abcdef"[c & 0xf],
 122                                 '\'',
 123                                 '\0'
 124                         };
 125                         tprints(hex);
 126                 }
 127         }
 128         tprints(")");
 129
 130         if (xlat) {
 131                 const char *pixfmt_name = xlookup(xlat, fourcc);
 132
 133                 if (pixfmt_name)
 134                         tprints_comment(pixfmt_name);
 135         }
 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, v4l2_pix_fmts);
 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, v4l2_pix_fmts);
 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, v4l2_pix_fmts);
 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, v4l2_pix_fmts);
 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, v4l2_sdr_fmts);
 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 /*
 617  * We include it here and not before print_v4l2_ext_controls as we need
 618  * V4L2_CTRL_CLASS_* definitions for V4L2_CID_*_BASE ones.
 619  */
 620 #include "xlat/v4l2_control_classes.h"
 621 #include "xlat/v4l2_control_id_bases.h"
 622 #include "xlat/v4l2_control_ids.h"
 623
 624 static int
 625 print_v4l2_control(struct tcb *const tcp, const kernel_ulong_t arg,
 626                    const bool is_get)
 627 {
 628         struct v4l2_control c;
 629
 630         if (entering(tcp)) {
 631                 tprints(", ");
 632                 if (umove_or_printaddr(tcp, arg, &c))
 633                         return RVAL_IOCTL_DECODED;
 634                 tprints("{id=");
 635                 printxval(v4l2_control_ids, c.id, "V4L2_CID_???");
 636                 if (!is_get)
 637                         tprintf(", value=%d", c.value);
 638                 return 0;
 639         }
 640
 641         if (!syserror(tcp) && !umove(tcp, arg, &c)) {
 642                 tprints(is_get ? ", " : " => ");
 643                 tprintf("value=%d", c.value);
 644         }
 645
 646         tprints("}");
 647
 648         return RVAL_IOCTL_DECODED;
 649 }
 650
 651 #include "xlat/v4l2_tuner_types.h"
 652 #include "xlat/v4l2_tuner_capabilities.h"
 653 #include "xlat/v4l2_tuner_rxsubchanses.h"
 654 #include "xlat/v4l2_tuner_audmodes.h"
 655
 656 static int
 657 print_v4l2_tuner(struct tcb *const tcp, const kernel_ulong_t arg,
 658                  const bool is_get)
 659 {
 660         struct v4l2_tuner c;
 661         if (entering(tcp)) {
 662                 tprints(", ");
 663                 if (umove_or_printaddr(tcp, arg, &c))
 664                         return RVAL_IOCTL_DECODED;
 665                 tprintf("{index=%u", c.index);
 666                 if (is_get)
 667                         return 0;
 668                 tprints(", ");
 669         } else {
 670                 if (syserror(tcp) || umove(tcp, arg, &c) < 0) {
 671                         tprints("}");
 672                         return RVAL_IOCTL_DECODED;
 673                 }
 674                 tprints(is_get ? ", " : " => ");
 675         }
 676
 677         PRINT_FIELD_CSTRING("", c, name);
 678         tprints(", type=");
 679         printxval(v4l2_tuner_types, c.type, "V4L2_TUNER_TYPE_???");
 680         tprints(", capability=");
 681         printxval(v4l2_tuner_capabilities, c.capability,
 682                   "V4L2_TUNER_CAP_???");
 683         tprintf(", rangelow=%u, rangehigh=%u, rxsubchans=",
 684                 c.rangelow, c.rangehigh);
 685         printxval(v4l2_tuner_rxsubchanses, c.rxsubchans,
 686                   "V4L2_TUNER_SUB_???");
 687         tprints(", audmode=");
 688         printxval(v4l2_tuner_audmodes, c.audmode,
 689                   "V4L2_TUNER_MODE_???");
 690         tprintf(", signal=%d, afc=%d", c.signal, c.afc);
 691
 692         if (entering(tcp)) {
 693                 return 0;
 694         } else {
 695                 tprints("}");
 696                 return RVAL_IOCTL_DECODED;
 697         }
 698 }
 699
 700 #include "xlat/v4l2_control_types.h"
 701 #include "xlat/v4l2_control_flags.h"
 702
 703 static int
 704 print_v4l2_queryctrl(struct tcb *const tcp, const kernel_ulong_t arg)
 705 {
 706         struct v4l2_queryctrl c;
 707
 708         if (entering(tcp)) {
 709                 tprints(", ");
 710                 if (umove_or_printaddr(tcp, arg, &c))
 711                         return RVAL_IOCTL_DECODED;
 712                 tprints("{id=");
 713         } else {
 714                 if (syserror(tcp) || umove(tcp, arg, &c) < 0) {
 715                         tprints("}");
 716                         return RVAL_IOCTL_DECODED;
 717                 }
 718                 if (get_tcb_priv_ulong(tcp))
 719                         tprints(" => ");
 720         }
 721
 722         if (entering(tcp) || get_tcb_priv_ulong(tcp)) {
 723 #ifdef V4L2_CTRL_FLAG_NEXT_CTRL
 724                 const unsigned long next = c.id & V4L2_CTRL_FLAG_NEXT_CTRL;
 725                 set_tcb_priv_ulong(tcp, next);
 726                 if (next) {
 727                         print_xlat(V4L2_CTRL_FLAG_NEXT_CTRL);
 728                         tprints("|");
 729                         c.id &= ~V4L2_CTRL_FLAG_NEXT_CTRL;
 730                 }
 731 #endif
 732                 printxval(v4l2_control_ids, c.id, "V4L2_CID_???");
 733         }
 734
 735         if (exiting(tcp)) {
 736                 tprints(", type=");
 737                 printxval(v4l2_control_types, c.type, "V4L2_CTRL_TYPE_???");
 738                 PRINT_FIELD_CSTRING(", ", c, name);
 739                 tprintf(", minimum=%d, maximum=%d, step=%d"
 740                         ", default_value=%d, flags=",
 741                         c.minimum, c.maximum, c.step, c.default_value);
 742                 printflags(v4l2_control_flags, c.flags, "V4L2_CTRL_FLAG_???");
 743                 tprints("}");
 744         }
 745         return entering(tcp) ? 0 : RVAL_IOCTL_DECODED;
 746 }
 747
 748 static int
 749 print_v4l2_cropcap(struct tcb *const tcp, const kernel_ulong_t arg)
 750 {
 751         struct v4l2_cropcap c;
 752
 753         if (entering(tcp)) {
 754                 tprints(", ");
 755                 if (umove_or_printaddr(tcp, arg, &c))
 756                         return RVAL_IOCTL_DECODED;
 757                 tprints("{type=");
 758                 printxval(v4l2_buf_types, c.type, "V4L2_BUF_TYPE_???");
 759
 760                 return 0;
 761         }
 762
 763         if (!syserror(tcp) && !umove(tcp, arg, &c)) {
 764                 tprintf(", bounds=" FMT_RECT
 765                         ", defrect=" FMT_RECT
 766                         ", pixelaspect=" FMT_FRACT,
 767                         ARGS_RECT(c.bounds),
 768                         ARGS_RECT(c.defrect),
 769                         ARGS_FRACT(c.pixelaspect));
 770         }
 771
 772         tprints("}");
 773
 774         return RVAL_IOCTL_DECODED;
 775 }
 776
 777 static int
 778 print_v4l2_crop(struct tcb *const tcp, const kernel_ulong_t arg,
 779                 const bool is_get)
 780 {
 781         struct v4l2_crop c;
 782
 783         if (entering(tcp)) {
 784                 tprints(", ");
 785                 if (umove_or_printaddr(tcp, arg, &c))
 786                         return RVAL_IOCTL_DECODED;
 787                 tprints("{type=");
 788                 printxval(v4l2_buf_types, c.type, "V4L2_BUF_TYPE_???");
 789                 if (is_get)
 790                         return 0;
 791                 tprintf(", c=" FMT_RECT, ARGS_RECT(c.c));
 792         } else {
 793                 if (!syserror(tcp) && !umove(tcp, arg, &c))
 794                         tprintf(", c=" FMT_RECT, ARGS_RECT(c.c));
 795         }
 796
 797         tprints("}");
 798
 799         return RVAL_IOCTL_DECODED;
 800 }
 801
 802 #ifdef VIDIOC_S_EXT_CTRLS
 803 static bool
 804 print_v4l2_ext_control(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
 805 {
 806         const struct_v4l2_ext_control *p = elem_buf;
 807
 808         tprints("{id=");
 809         printxval(v4l2_control_ids, p->id, "V4L2_CID_???");
 810 # if HAVE_DECL_V4L2_CTRL_TYPE_STRING
 811         tprintf(", size=%u", p->size);
 812         if (p->size > 0) {
 813                 tprints(", string=");
 814                 printstrn(tcp, ptr_to_kulong(p->string), p->size);
 815         } else
 816 # endif
 817         tprintf(", value=%d, value64=%" PRId64, p->value, (int64_t) p->value64);
 818         tprints("}");
 819
 820         return true;
 821 }
 822
 823 static int
 824 print_v4l2_ext_controls(struct tcb *const tcp, const kernel_ulong_t arg,
 825                         const bool is_get)
 826 {
 827         struct_v4l2_ext_controls c;
 828
 829         if (entering(tcp)) {
 830                 tprints(", ");
 831                 if (umove_or_printaddr(tcp, arg, &c))
 832                         return RVAL_IOCTL_DECODED;
 833                 tprints("{ctrl_class=");
 834                 printxval(v4l2_control_classes, c.ctrl_class,
 835                           "V4L2_CTRL_CLASS_???");
 836                 tprintf(", count=%u", c.count);
 837                 if (!c.count) {
 838                         tprints("}");
 839                         return RVAL_IOCTL_DECODED;
 840                 }
 841                 if (is_get)
 842                         return 0;
 843                 tprints(", ");
 844         } else {
 845                 if (umove(tcp, arg, &c) < 0) {
 846                         tprints("}");
 847                         return RVAL_IOCTL_DECODED;
 848                 }
 849                 tprints(is_get ? ", " : " => ");
 850         }
 851
 852         tprints("controls=");
 853         struct_v4l2_ext_control ctrl;
 854         bool fail = !print_array(tcp, ptr_to_kulong(c.controls), c.count,
 855                                  &ctrl, sizeof(ctrl),
 856                                  umoven_or_printaddr_ignore_syserror,
 857                                  print_v4l2_ext_control, 0);
 858
 859         if (exiting(tcp) && syserror(tcp))
 860                 tprintf(", error_idx=%u", c.error_idx);
 861
 862         if (exiting(tcp) || fail) {
 863                 tprints("}");
 864                 return RVAL_IOCTL_DECODED;
 865         }
 866
 867         /* entering */
 868         return 0;
 869 }
 870 #endif /* VIDIOC_S_EXT_CTRLS */
 871
 872 #ifdef VIDIOC_ENUM_FRAMESIZES
 873 # include "xlat/v4l2_framesize_types.h"
 874
 875 static int
 876 print_v4l2_frmsizeenum(struct tcb *const tcp, const kernel_ulong_t arg)
 877 {
 878         struct v4l2_frmsizeenum s;
 879
 880         if (entering(tcp)) {
 881                 tprints(", ");
 882                 if (umove_or_printaddr(tcp, arg, &s))
 883                         return RVAL_IOCTL_DECODED;
 884                 tprintf("{index=%u, pixel_format=", s.index);
 885                 print_pixelformat(s.pixel_format, v4l2_pix_fmts);
 886                 return 0;
 887         }
 888
 889         if (!syserror(tcp) && !umove(tcp, arg, &s)) {
 890                 tprints(", type=");
 891                 printxval(v4l2_framesize_types, s.type, "V4L2_FRMSIZE_TYPE_???");
 892                 switch (s.type) {
 893                 case V4L2_FRMSIZE_TYPE_DISCRETE:
 894                         tprintf(", discrete={width=%u, height=%u}",
 895                                 s.discrete.width, s.discrete.height);
 896                         break;
 897                 case V4L2_FRMSIZE_TYPE_STEPWISE:
 898                         tprintf(", stepwise={min_width=%u, max_width=%u, "
 899                                 "step_width=%u, min_height=%u, max_height=%u, "
 900                                 "step_height=%u}",
 901                                 s.stepwise.min_width, s.stepwise.max_width,
 902                                 s.stepwise.step_width, s.stepwise.min_height,
 903                                 s.stepwise.max_height, s.stepwise.step_height);
 904                         break;
 905                 }
 906         }
 907         tprints("}");
 908         return RVAL_IOCTL_DECODED;
 909 }
 910 #endif /* VIDIOC_ENUM_FRAMESIZES */
 911
 912 #ifdef VIDIOC_ENUM_FRAMEINTERVALS
 913 # include "xlat/v4l2_frameinterval_types.h"
 914
 915 static int
 916 print_v4l2_frmivalenum(struct tcb *const tcp, const kernel_ulong_t arg)
 917 {
 918         struct v4l2_frmivalenum f;
 919
 920         if (entering(tcp)) {
 921                 tprints(", ");
 922                 if (umove_or_printaddr(tcp, arg, &f))
 923                         return RVAL_IOCTL_DECODED;
 924                 tprintf("{index=%u, pixel_format=", f.index);
 925                 print_pixelformat(f.pixel_format, v4l2_pix_fmts);
 926                 tprintf(", width=%u, height=%u", f.width, f.height);
 927                 return 0;
 928         }
 929
 930         if (!syserror(tcp) && !umove(tcp, arg, &f)) {
 931                 tprints(", type=");
 932                 printxval(v4l2_frameinterval_types, f.type,
 933                           "V4L2_FRMIVAL_TYPE_???");
 934                 switch (f.type) {
 935                 case V4L2_FRMIVAL_TYPE_DISCRETE:
 936                         tprintf(", discrete=" FMT_FRACT,
 937                                 ARGS_FRACT(f.discrete));
 938                         break;
 939                 case V4L2_FRMIVAL_TYPE_STEPWISE:
 940                 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 941                         tprintf(", stepwise={min=" FMT_FRACT ", max="
 942                                 FMT_FRACT ", step=" FMT_FRACT "}",
 943                                 ARGS_FRACT(f.stepwise.min),
 944                                 ARGS_FRACT(f.stepwise.max),
 945                                 ARGS_FRACT(f.stepwise.step));
 946                         break;
 947                 }
 948         }
 949
 950         tprints("}");
 951
 952         return RVAL_IOCTL_DECODED;
 953 }
 954 #endif /* VIDIOC_ENUM_FRAMEINTERVALS */
 955
 956 #ifdef VIDIOC_CREATE_BUFS
 957 static int
 958 print_v4l2_create_buffers(struct tcb *const tcp, const kernel_ulong_t arg)
 959 {
 960         static const char fmt[] = "{index=%u, count=%u}";
 961         static char outstr[sizeof(fmt) + sizeof(int) * 6];
 962
 963         struct_v4l2_create_buffers b;
 964
 965         if (entering(tcp)) {
 966                 tprints(", ");
 967                 if (umove_or_printaddr(tcp, arg, &b))
 968                         return RVAL_IOCTL_DECODED;
 969                 tprintf("{count=%u, memory=", b.count);
 970                 printxval(v4l2_memories, b.memory, "V4L2_MEMORY_???");
 971                 tprints(", format={type=");
 972                 printxval(v4l2_buf_types, b.format.type,
 973                           "V4L2_BUF_TYPE_???");
 974                 print_v4l2_format_fmt(tcp, ", ",
 975                                       (struct_v4l2_format *) &b.format);
 976                 tprints("}}");
 977                 return 0;
 978         }
 979
 980         if (syserror(tcp) || umove(tcp, arg, &b))
 981                 return RVAL_IOCTL_DECODED;
 982
 983         xsprintf(outstr, fmt, b.index, b.count);
 984         tcp->auxstr = outstr;
 985
 986         return RVAL_IOCTL_DECODED | RVAL_STR;
 987 }
 988 #endif /* VIDIOC_CREATE_BUFS */
 989
 990 MPERS_PRINTER_DECL(int, v4l2_ioctl, struct tcb *const tcp,
 991                    const unsigned int code, const kernel_ulong_t arg)
 992 {
 993         if (!verbose(tcp))
 994                 return RVAL_DECODED;
 995
 996         switch (code) {
 997         case VIDIOC_QUERYCAP: /* R */
 998                 return print_v4l2_capability(tcp, arg);
 999
1000         case VIDIOC_ENUM_FMT: /* RW */
1001                 return print_v4l2_fmtdesc(tcp, arg);
1002
1003         case VIDIOC_G_FMT: /* RW */
1004         case VIDIOC_S_FMT: /* RW */
1005         case VIDIOC_TRY_FMT: /* RW */
1006                 return print_v4l2_format(tcp, arg, code == VIDIOC_G_FMT);
1007
1008         case VIDIOC_REQBUFS: /* RW */
1009                 return print_v4l2_requestbuffers(tcp, arg);
1010
1011         case VIDIOC_QUERYBUF: /* RW */
1012         case VIDIOC_QBUF: /* RW */
1013         case VIDIOC_DQBUF: /* RW */
1014                 return print_v4l2_buffer(tcp, code, arg);
1015
1016         case VIDIOC_G_FBUF: /* R */
1017                 if (entering(tcp))
1018                         return 0;
1019                 ATTRIBUTE_FALLTHROUGH;
1020         case VIDIOC_S_FBUF: /* W */
1021                 return print_v4l2_framebuffer(tcp, arg);
1022
1023         case VIDIOC_STREAMON: /* W */
1024         case VIDIOC_STREAMOFF: /* W */
1025                 return print_v4l2_buf_type(tcp, arg);
1026
1027         case VIDIOC_G_PARM: /* RW */
1028         case VIDIOC_S_PARM: /* RW */
1029                 return print_v4l2_streamparm(tcp, arg, code == VIDIOC_G_PARM);
1030
1031         case VIDIOC_G_STD: /* R */
1032                 if (entering(tcp))
1033                         return 0;
1034                 ATTRIBUTE_FALLTHROUGH;
1035         case VIDIOC_S_STD: /* W */
1036                 tprints(", ");
1037                 printnum_int64(tcp, arg, "%#" PRIx64);
1038                 break;
1039
1040         case VIDIOC_ENUMSTD: /* RW */
1041                 return print_v4l2_standard(tcp, arg);
1042
1043         case VIDIOC_ENUMINPUT: /* RW */
1044                 return print_v4l2_input(tcp, arg);
1045
1046         case VIDIOC_G_CTRL: /* RW */
1047         case VIDIOC_S_CTRL: /* RW */
1048                 return print_v4l2_control(tcp, arg, code == VIDIOC_G_CTRL);
1049
1050         case VIDIOC_G_TUNER: /* RW */
1051         case VIDIOC_S_TUNER: /* RW */
1052                 return print_v4l2_tuner(tcp, arg, code == VIDIOC_G_TUNER);
1053
1054         case VIDIOC_QUERYCTRL: /* RW */
1055                 return print_v4l2_queryctrl(tcp, arg);
1056
1057         case VIDIOC_G_INPUT: /* R */
1058                 if (entering(tcp))
1059                         return 0;
1060                 ATTRIBUTE_FALLTHROUGH;
1061         case VIDIOC_S_INPUT: /* RW */
1062                 tprints(", ");
1063                 printnum_int(tcp, arg, "%u");
1064                 break;
1065
1066         case VIDIOC_CROPCAP: /* RW */
1067                 return print_v4l2_cropcap(tcp, arg);
1068
1069         case VIDIOC_G_CROP: /* RW */
1070         case VIDIOC_S_CROP: /* W */
1071                 return print_v4l2_crop(tcp, arg, code == VIDIOC_G_CROP);
1072
1073 #ifdef VIDIOC_S_EXT_CTRLS
1074         case VIDIOC_S_EXT_CTRLS: /* RW */
1075         case VIDIOC_TRY_EXT_CTRLS: /* RW */
1076         case VIDIOC_G_EXT_CTRLS: /* RW */
1077                 return print_v4l2_ext_controls(tcp, arg,
1078                                                code == VIDIOC_G_EXT_CTRLS);
1079 #endif /* VIDIOC_S_EXT_CTRLS */
1080
1081 #ifdef VIDIOC_ENUM_FRAMESIZES
1082         case VIDIOC_ENUM_FRAMESIZES: /* RW */
1083                 return print_v4l2_frmsizeenum(tcp, arg);
1084 #endif /* VIDIOC_ENUM_FRAMESIZES */
1085
1086 #ifdef VIDIOC_ENUM_FRAMEINTERVALS
1087         case VIDIOC_ENUM_FRAMEINTERVALS: /* RW */
1088                 return print_v4l2_frmivalenum(tcp, arg);
1089 #endif /* VIDIOC_ENUM_FRAMEINTERVALS */
1090
1091 #ifdef VIDIOC_CREATE_BUFS
1092         case VIDIOC_CREATE_BUFS: /* RW */
1093                 return print_v4l2_create_buffers(tcp, arg);
1094 #endif /* VIDIOC_CREATE_BUFS */
1095
1096         default:
1097                 return RVAL_DECODED;
1098         }
1099
1100         return RVAL_IOCTL_DECODED;
1101 }