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 /* some historical constants */
  68 #ifndef V4L2_CID_HCENTER
  69 #define V4L2_CID_HCENTER (V4L2_CID_BASE+22)
  70 #endif
  71 #ifndef V4L2_CID_VCENTER
  72 #define V4L2_CID_VCENTER (V4L2_CID_BASE+23)
  73 #endif
  74 #ifndef V4L2_CID_BAND_STOP_FILTER
  75 #define V4L2_CID_BAND_STOP_FILTER (V4L2_CID_BASE+33)
  76 #endif
  77
  78 /* v4l2_fourcc_be was added by Linux commit v3.18-rc1~101^2^2~127 */
  79 #ifndef v4l2_fourcc_be
  80 # define v4l2_fourcc_be(a, b, c, d) (v4l2_fourcc(a, b, c, d) | (1 << 31))
  81 #endif
  82
  83 #define FMT_FRACT "%u/%u"
  84 #define ARGS_FRACT(x) ((x).numerator), ((x).denominator)
  85
  86 #define FMT_RECT "{left=%d, top=%d, width=%u, height=%u}"
  87 #define ARGS_RECT(x) (x).left, (x).top, (x).width, (x).height
  88
  89 #include "xlat/v4l2_pix_fmts.h"
  90 #include "xlat/v4l2_sdr_fmts.h"
  91
  92 static void
  93 print_pixelformat(uint32_t fourcc, const struct xlat *xlat)
  94 {
  95         unsigned char a[] = {
  96                 (unsigned char) fourcc,
  97                 (unsigned char) (fourcc >> 8),
  98                 (unsigned char) (fourcc >> 16),
  99                 (unsigned char) (fourcc >> 24),
 100         };
 101         unsigned int i;
 102
 103         tprints("v4l2_fourcc(");
 104         for (i = 0; i < ARRAY_SIZE(a); ++i) {
 105                 unsigned char c = a[i];
 106
 107                 if (i)
 108                         tprints(", ");
 109                 if (c == '\'' || c == '\\') {
 110                         char sym[] = {
 111                                 '\'',
 112                                 '\\',
 113                                 c,
 114                                 '\'',
 115                                 '\0'
 116                         };
 117                         tprints(sym);
 118                 } else if (c >= ' ' && c <= 0x7e) {
 119                         char sym[] = {
 120                                 '\'',
 121                                 c,
 122                                 '\'',
 123                                 '\0'
 124                         };
 125                         tprints(sym);
 126                 } else {
 127                         char hex[] = {
 128                                 '\'',
 129                                 '\\',
 130                                 'x',
 131                                 "0123456789abcdef"[c >> 4],
 132                                 "0123456789abcdef"[c & 0xf],
 133                                 '\'',
 134                                 '\0'
 135                         };
 136                         tprints(hex);
 137                 }
 138         }
 139         tprints(")");
 140
 141         if (xlat) {
 142                 const char *pixfmt_name = xlookup(xlat, fourcc);
 143
 144                 if (pixfmt_name)
 145                         tprints_comment(pixfmt_name);
 146         }
 147 }
 148
 149 #include "xlat/v4l2_device_capabilities_flags.h"
 150
 151 static int
 152 print_v4l2_capability(struct tcb *const tcp, const kernel_ulong_t arg)
 153 {
 154         struct v4l2_capability caps;
 155
 156         if (entering(tcp))
 157                 return 0;
 158         tprints(", ");
 159         if (umove_or_printaddr(tcp, arg, &caps))
 160                 return RVAL_IOCTL_DECODED;
 161         PRINT_FIELD_CSTRING("{", caps, driver);
 162         PRINT_FIELD_CSTRING(", ", caps, card);
 163         PRINT_FIELD_CSTRING(", ", caps, bus_info);
 164         tprintf(", version=%u.%u.%u, capabilities=",
 165                 (caps.version >> 16) & 0xFF,
 166                 (caps.version >> 8) & 0xFF,
 167                 caps.version & 0xFF);
 168         printflags(v4l2_device_capabilities_flags, caps.capabilities,
 169                    "V4L2_CAP_???");
 170 #ifdef V4L2_CAP_DEVICE_CAPS
 171         tprints(", device_caps=");
 172         printflags(v4l2_device_capabilities_flags, caps.device_caps,
 173                    "V4L2_CAP_???");
 174 #endif
 175         tprints("}");
 176         return RVAL_IOCTL_DECODED;
 177 }
 178
 179 #include "xlat/v4l2_buf_types.h"
 180 #include "xlat/v4l2_format_description_flags.h"
 181
 182 static int
 183 print_v4l2_fmtdesc(struct tcb *const tcp, const kernel_ulong_t arg)
 184 {
 185         struct v4l2_fmtdesc f;
 186
 187         if (entering(tcp)) {
 188                 tprints(", ");
 189                 if (umove_or_printaddr(tcp, arg, &f))
 190                         return RVAL_IOCTL_DECODED;
 191                 tprintf("{index=%u, type=", f.index);
 192                 printxval(v4l2_buf_types, f.type, "V4L2_BUF_TYPE_???");
 193                 return 0;
 194         }
 195
 196         if (!syserror(tcp) && !umove(tcp, arg, &f)) {
 197                 tprints(", flags=");
 198                 printflags(v4l2_format_description_flags, f.flags,
 199                            "V4L2_FMT_FLAG_???");
 200                 PRINT_FIELD_CSTRING(", ", f, description);
 201                 tprints(", pixelformat=");
 202                 print_pixelformat(f.pixelformat, v4l2_pix_fmts);
 203         }
 204         tprints("}");
 205         return RVAL_IOCTL_DECODED;
 206 }
 207
 208 #include "xlat/v4l2_fields.h"
 209 #include "xlat/v4l2_colorspaces.h"
 210 #include "xlat/v4l2_vbi_flags.h"
 211 #include "xlat/v4l2_sliced_flags.h"
 212
 213 static bool
 214 print_v4l2_clip(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
 215 {
 216         const struct_v4l2_clip *p = elem_buf;
 217         tprintf(FMT_RECT, ARGS_RECT(p->c));
 218         return true;
 219 }
 220
 221 static bool
 222 print_v4l2_format_fmt(struct tcb *const tcp, const char *prefix,
 223                       const struct_v4l2_format *f)
 224 {
 225         bool ret = true;
 226         switch (f->type) {
 227         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 228         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 229                 tprints(prefix);
 230                 tprintf("fmt.pix={width=%u, height=%u, pixelformat=",
 231                         f->fmt.pix.width, f->fmt.pix.height);
 232                 print_pixelformat(f->fmt.pix.pixelformat, v4l2_pix_fmts);
 233                 tprints(", field=");
 234                 printxval(v4l2_fields, f->fmt.pix.field, "V4L2_FIELD_???");
 235                 tprintf(", bytesperline=%u, sizeimage=%u, colorspace=",
 236                         f->fmt.pix.bytesperline, f->fmt.pix.sizeimage);
 237                 printxval(v4l2_colorspaces, f->fmt.pix.colorspace,
 238                           "V4L2_COLORSPACE_???");
 239                 tprints("}");
 240                 break;
 241 #if HAVE_DECL_V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE
 242         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 243         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: {
 244                 unsigned int i, max;
 245
 246                 tprints(prefix);
 247                 tprintf("fmt.pix_mp={width=%u, height=%u, pixelformat=",
 248                         f->fmt.pix_mp.width, f->fmt.pix_mp.height);
 249                 print_pixelformat(f->fmt.pix_mp.pixelformat, v4l2_pix_fmts);
 250                 tprints(", field=");
 251                 printxval(v4l2_fields, f->fmt.pix_mp.field, "V4L2_FIELD_???");
 252                 tprints(", colorspace=");
 253                 printxval(v4l2_colorspaces, f->fmt.pix_mp.colorspace,
 254                           "V4L2_COLORSPACE_???");
 255                 tprints(", plane_fmt=[");
 256                 max = f->fmt.pix_mp.num_planes;
 257                 if (max > VIDEO_MAX_PLANES)
 258                         max = VIDEO_MAX_PLANES;
 259                 for (i = 0; i < max; i++) {
 260                         if (i > 0)
 261                                 tprints(", ");
 262                         tprintf("{sizeimage=%u, bytesperline=%u}",
 263                                 f->fmt.pix_mp.plane_fmt[i].sizeimage,
 264                                 f->fmt.pix_mp.plane_fmt[i].bytesperline);
 265                 }
 266                 tprintf("], num_planes=%u}",
 267                         (unsigned) f->fmt.pix_mp.num_planes);
 268                 break;
 269         }
 270 #endif
 271         /* OUTPUT_OVERLAY since Linux v2.6.22-rc1~1118^2~179 */
 272 #if HAVE_DECL_V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY
 273         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 274 #endif
 275         case V4L2_BUF_TYPE_VIDEO_OVERLAY: {
 276                 struct_v4l2_clip clip;
 277                 tprints(prefix);
 278                 tprintf("fmt.win={left=%d, top=%d, width=%u, height=%u, field=",
 279                         ARGS_RECT(f->fmt.win.w));
 280                 printxval(v4l2_fields, f->fmt.win.field, "V4L2_FIELD_???");
 281                 tprintf(", chromakey=%#x, clips=", f->fmt.win.chromakey);
 282                 ret = print_array(tcp, ptr_to_kulong(f->fmt.win.clips),
 283                                   f->fmt.win.clipcount, &clip, sizeof(clip),
 284                                   umoven_or_printaddr, print_v4l2_clip, 0);
 285                 tprintf(", clipcount=%u, bitmap=", f->fmt.win.clipcount);
 286                 printaddr(ptr_to_kulong(f->fmt.win.bitmap));
 287 #ifdef HAVE_STRUCT_V4L2_WINDOW_GLOBAL_ALPHA
 288                 tprintf(", global_alpha=%#x", f->fmt.win.global_alpha);
 289 #endif
 290                 tprints("}");
 291                 break;
 292         }
 293         case V4L2_BUF_TYPE_VBI_CAPTURE:
 294         case V4L2_BUF_TYPE_VBI_OUTPUT:
 295                 tprints(prefix);
 296                 tprintf("fmt.vbi={sampling_rate=%u, offset=%u, "
 297                         "samples_per_line=%u, sample_format=",
 298                         f->fmt.vbi.sampling_rate, f->fmt.vbi.offset,
 299                         f->fmt.vbi.samples_per_line);
 300                 print_pixelformat(f->fmt.vbi.sample_format, v4l2_pix_fmts);
 301                 tprintf(", start=[%u, %u], count=[%u, %u], ",
 302                         f->fmt.vbi.start[0], f->fmt.vbi.start[1],
 303                         f->fmt.vbi.count[0], f->fmt.vbi.count[1]);
 304                 tprints("flags=");
 305                 printxval(v4l2_vbi_flags, f->fmt.vbi.flags, "V4L2_VBI_???");
 306                 tprints("}");
 307                 break;
 308         /* both since Linux v2.6.14-rc2~64 */
 309 #if HAVE_DECL_V4L2_BUF_TYPE_SLICED_VBI_CAPTURE
 310         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 311         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: {
 312                 unsigned int i, j;
 313
 314                 tprints(prefix);
 315                 tprints("fmt.sliced={service_set=");
 316                 printxval(v4l2_sliced_flags, f->fmt.sliced.service_set,
 317                         "V4L2_SLICED_???");
 318                 tprintf(", io_size=%u, service_lines=[",
 319                         f->fmt.sliced.io_size);
 320                 for (i = 0; i < ARRAY_SIZE(f->fmt.sliced.service_lines); i++) {
 321                         if (i > 0)
 322                                 tprints(", ");
 323                         tprints("[");
 324                         for (j = 0;
 325                              j < ARRAY_SIZE(f->fmt.sliced.service_lines[0]);
 326                              j++) {
 327                                 if (j > 0)
 328                                         tprints(", ");
 329                                 tprintf("%#x",
 330                                         f->fmt.sliced.service_lines[i][j]);
 331                         }
 332                         tprints("]");
 333                 }
 334                 tprints("]}");
 335                 break;
 336         }
 337 #endif
 338         /* since Linux v4.4-rc1~118^2~14 */
 339 #if HAVE_DECL_V4L2_BUF_TYPE_SDR_OUTPUT
 340         case V4L2_BUF_TYPE_SDR_OUTPUT:
 341 #endif
 342         /* since Linux v3.15-rc1~85^2~213 */
 343 #if HAVE_DECL_V4L2_BUF_TYPE_SDR_CAPTURE
 344         case V4L2_BUF_TYPE_SDR_CAPTURE:
 345                 tprints(prefix);
 346                 tprints("fmt.sdr={pixelformat=");
 347                 print_pixelformat(f->fmt.sdr.pixelformat, v4l2_sdr_fmts);
 348 #ifdef HAVE_STRUCT_V4L2_SDR_FORMAT_BUFFERSIZE
 349                 tprintf(", buffersize=%u",
 350                         f->fmt.sdr.buffersize);
 351 #endif
 352                 tprints("}");
 353                 break;
 354 #endif
 355         }
 356         return ret;
 357 }
 358
 359 static int
 360 print_v4l2_format(struct tcb *const tcp, const kernel_ulong_t arg,
 361                   const bool is_get)
 362 {
 363         struct_v4l2_format f;
 364
 365         if (entering(tcp)) {
 366                 tprints(", ");
 367                 if (umove_or_printaddr(tcp, arg, &f))
 368                         return RVAL_IOCTL_DECODED;
 369                 tprints("{type=");
 370                 printxval(v4l2_buf_types, f.type, "V4L2_BUF_TYPE_???");
 371                 if (is_get)
 372                         return 0;
 373                 if (!print_v4l2_format_fmt(tcp, ", ", &f)) {
 374                         tprints("}");
 375                         return RVAL_IOCTL_DECODED;
 376                 }
 377
 378                 return 0;
 379         }
 380
 381         if (!syserror(tcp) && !umove(tcp, arg, &f))
 382                 print_v4l2_format_fmt(tcp, is_get ? ", " : " => ", &f);
 383
 384         tprints("}");
 385
 386         return RVAL_IOCTL_DECODED;
 387 }
 388
 389 #include "xlat/v4l2_memories.h"
 390
 391 static int
 392 print_v4l2_requestbuffers(struct tcb *const tcp, const kernel_ulong_t arg)
 393 {
 394         struct v4l2_requestbuffers reqbufs;
 395
 396         if (entering(tcp)) {
 397                 tprints(", ");
 398
 399                 if (umove_or_printaddr(tcp, arg, &reqbufs))
 400                         return RVAL_IOCTL_DECODED;
 401
 402                 tprintf("{type=");
 403                 printxval(v4l2_buf_types, reqbufs.type, "V4L2_BUF_TYPE_???");
 404                 tprints(", memory=");
 405                 printxval(v4l2_memories, reqbufs.memory, "V4L2_MEMORY_???");
 406                 tprintf(", count=%u", reqbufs.count);
 407
 408                 return 0;
 409         }
 410
 411         if (!syserror(tcp)) {
 412                 tprints(" => ");
 413
 414                 if (!umove(tcp, arg, &reqbufs))
 415                         tprintf("%u", reqbufs.count);
 416                 else
 417                         tprints("???");
 418         }
 419
 420         tprints("}");
 421
 422         return RVAL_IOCTL_DECODED;
 423 }
 424
 425 #include "xlat/v4l2_buf_flags.h"
 426
 427 static int
 428 print_v4l2_buffer(struct tcb *const tcp, const unsigned int code,
 429                   const kernel_ulong_t arg)
 430 {
 431         struct_v4l2_buffer b;
 432
 433         if (entering(tcp)) {
 434                 tprints(", ");
 435                 if (umove_or_printaddr(tcp, arg, &b))
 436                         return RVAL_IOCTL_DECODED;
 437                 tprints("{type=");
 438                 printxval(v4l2_buf_types, b.type, "V4L2_BUF_TYPE_???");
 439                 if (code != VIDIOC_DQBUF)
 440                         tprintf(", index=%u", b.index);
 441
 442                 return 0;
 443         }
 444
 445         if (!syserror(tcp) && !umove(tcp, arg, &b)) {
 446                 if (code == VIDIOC_DQBUF)
 447                         tprintf(", index=%u", b.index);
 448                 tprints(", memory=");
 449                 printxval(v4l2_memories, b.memory, "V4L2_MEMORY_???");
 450
 451                 if (b.memory == V4L2_MEMORY_MMAP) {
 452                         tprintf(", m.offset=%#x", b.m.offset);
 453                 } else if (b.memory == V4L2_MEMORY_USERPTR) {
 454                         tprints(", m.userptr=");
 455                         printaddr(b.m.userptr);
 456                 }
 457
 458                 tprintf(", length=%u, bytesused=%u, flags=",
 459                         b.length, b.bytesused);
 460                 printflags(v4l2_buf_flags, b.flags, "V4L2_BUF_FLAG_???");
 461                 if (code == VIDIOC_DQBUF) {
 462                         tprints(", timestamp = ");
 463                         MPERS_FUNC_NAME(print_struct_timeval)(&b.timestamp);
 464                 }
 465                 tprints(", ...");
 466         }
 467
 468         tprints("}");
 469
 470         return RVAL_IOCTL_DECODED;
 471 }
 472
 473 static int
 474 print_v4l2_framebuffer(struct tcb *const tcp, const kernel_ulong_t arg)
 475 {
 476         struct_v4l2_framebuffer b;
 477
 478         tprints(", ");
 479         if (!umove_or_printaddr(tcp, arg, &b)) {
 480                 tprintf("{capability=%#x, flags=%#x, base=",
 481                         b.capability, b.flags);
 482                 printaddr(ptr_to_kulong(b.base));
 483                 tprints("}");
 484         }
 485
 486         return RVAL_IOCTL_DECODED;
 487 }
 488
 489 static int
 490 print_v4l2_buf_type(struct tcb *const tcp, const kernel_ulong_t arg)
 491 {
 492         int type;
 493
 494         tprints(", ");
 495         if (!umove_or_printaddr(tcp, arg, &type)) {
 496                 tprints("[");
 497                 printxval(v4l2_buf_types, type, "V4L2_BUF_TYPE_???");
 498                 tprints("]");
 499         }
 500         return RVAL_IOCTL_DECODED;
 501 }
 502
 503 #include "xlat/v4l2_streaming_capabilities.h"
 504 #include "xlat/v4l2_capture_modes.h"
 505
 506 static int
 507 print_v4l2_streamparm(struct tcb *const tcp, const kernel_ulong_t arg,
 508                       const bool is_get)
 509 {
 510         struct v4l2_streamparm s;
 511
 512         if (entering(tcp)) {
 513                 tprints(", ");
 514                 if (umove_or_printaddr(tcp, arg, &s))
 515                         return RVAL_IOCTL_DECODED;
 516                 tprints("{type=");
 517                 printxval(v4l2_buf_types, s.type, "V4L2_BUF_TYPE_???");
 518                 switch (s.type) {
 519                         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 520                         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 521                                 if (is_get)
 522                                         return 0;
 523                                 tprints(", ");
 524                                 break;
 525                         default:
 526                                 tprints("}");
 527                                 return RVAL_IOCTL_DECODED;
 528                 }
 529         } else {
 530                 if (syserror(tcp) || umove(tcp, arg, &s) < 0) {
 531                         tprints("}");
 532                         return RVAL_IOCTL_DECODED;
 533                 }
 534                 tprints(is_get ? ", " : " => ");
 535         }
 536
 537         if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
 538                 tprints("parm.capture={capability=");
 539                 printflags(v4l2_streaming_capabilities,
 540                            s.parm.capture.capability, "V4L2_CAP_???");
 541
 542                 tprints(", capturemode=");
 543                 printflags(v4l2_capture_modes,
 544                            s.parm.capture.capturemode, "V4L2_MODE_???");
 545
 546                 tprintf(", timeperframe=" FMT_FRACT,
 547                         ARGS_FRACT(s.parm.capture.timeperframe));
 548
 549                 tprintf(", extendedmode=%u, readbuffers=%u}",
 550                         s.parm.capture.extendedmode,
 551                         s.parm.capture.readbuffers);
 552         } else {
 553                 tprints("parm.output={capability=");
 554                 printflags(v4l2_streaming_capabilities,
 555                            s.parm.output.capability, "V4L2_CAP_???");
 556
 557                 tprintf(", outputmode=%u", s.parm.output.outputmode);
 558
 559                 tprintf(", timeperframe=" FMT_FRACT,
 560                         ARGS_FRACT(s.parm.output.timeperframe));
 561
 562                 tprintf(", extendedmode=%u, writebuffers=%u}",
 563                         s.parm.output.extendedmode,
 564                         s.parm.output.writebuffers);
 565         }
 566         if (entering(tcp)) {
 567                 return 0;
 568         } else {
 569                 tprints("}");
 570                 return RVAL_IOCTL_DECODED;
 571         }
 572 }
 573
 574 static int
 575 print_v4l2_standard(struct tcb *const tcp, const kernel_ulong_t arg)
 576 {
 577         struct_v4l2_standard s;
 578
 579         if (entering(tcp)) {
 580                 tprints(", ");
 581                 if (umove_or_printaddr(tcp, arg, &s))
 582                         return RVAL_IOCTL_DECODED;
 583                 tprintf("{index=%u", s.index);
 584
 585                 return 0;
 586         }
 587
 588         if (!syserror(tcp) && !umove(tcp, arg, &s)) {
 589                 PRINT_FIELD_CSTRING(", ", s, name);
 590                 tprintf(", frameperiod=" FMT_FRACT,
 591                         ARGS_FRACT(s.frameperiod));
 592                 tprintf(", framelines=%d", s.framelines);
 593         }
 594
 595         tprints("}");
 596
 597         return RVAL_IOCTL_DECODED;
 598 }
 599
 600 #include "xlat/v4l2_input_types.h"
 601
 602 static int
 603 print_v4l2_input(struct tcb *const tcp, const kernel_ulong_t arg)
 604 {
 605         struct_v4l2_input i;
 606
 607         if (entering(tcp)) {
 608                 tprints(", ");
 609                 if (umove_or_printaddr(tcp, arg, &i))
 610                         return RVAL_IOCTL_DECODED;
 611                 tprintf("{index=%u", i.index);
 612
 613                 return 0;
 614         }
 615
 616         if (!syserror(tcp) && !umove(tcp, arg, &i)) {
 617                 PRINT_FIELD_CSTRING(", ", i, name);
 618                 tprints(", type=");
 619                 printxval(v4l2_input_types, i.type, "V4L2_INPUT_TYPE_???");
 620         }
 621
 622         tprints("}");
 623
 624         return RVAL_IOCTL_DECODED;
 625 }
 626
 627 #include "xlat/v4l2_control_ids.h"
 628
 629 static int
 630 print_v4l2_control(struct tcb *const tcp, const kernel_ulong_t arg,
 631                    const bool is_get)
 632 {
 633         struct v4l2_control c;
 634
 635         if (entering(tcp)) {
 636                 tprints(", ");
 637                 if (umove_or_printaddr(tcp, arg, &c))
 638                         return RVAL_IOCTL_DECODED;
 639                 tprints("{id=");
 640                 printxval(v4l2_control_ids, c.id, "V4L2_CID_???");
 641                 if (!is_get)
 642                         tprintf(", value=%d", c.value);
 643                 return 0;
 644         }
 645
 646         if (!syserror(tcp) && !umove(tcp, arg, &c)) {
 647                 tprints(is_get ? ", " : " => ");
 648                 tprintf("value=%d", c.value);
 649         }
 650
 651         tprints("}");
 652
 653         return RVAL_IOCTL_DECODED;
 654 }
 655
 656 #include "xlat/v4l2_tuner_types.h"
 657 #include "xlat/v4l2_tuner_capabilities.h"
 658 #include "xlat/v4l2_tuner_rxsubchanses.h"
 659 #include "xlat/v4l2_tuner_audmodes.h"
 660
 661 static int
 662 print_v4l2_tuner(struct tcb *const tcp, const kernel_ulong_t arg,
 663                  const bool is_get)
 664 {
 665         struct v4l2_tuner c;
 666         if (entering(tcp)) {
 667                 tprints(", ");
 668                 if (umove_or_printaddr(tcp, arg, &c))
 669                         return RVAL_IOCTL_DECODED;
 670                 tprintf("{index=%u", c.index);
 671                 if (is_get)
 672                         return 0;
 673                 tprints(", ");
 674         } else {
 675                 if (syserror(tcp) || umove(tcp, arg, &c) < 0) {
 676                         tprints("}");
 677                         return RVAL_IOCTL_DECODED;
 678                 }
 679                 tprints(is_get ? ", " : " => ");
 680         }
 681
 682         PRINT_FIELD_CSTRING("", c, name);
 683         tprints(", type=");
 684         printxval(v4l2_tuner_types, c.type, "V4L2_TUNER_TYPE_???");
 685         tprints(", capability=");
 686         printxval(v4l2_tuner_capabilities, c.capability,
 687                   "V4L2_TUNER_CAP_???");
 688         tprintf(", rangelow=%u, rangehigh=%u, rxsubchans=",
 689                 c.rangelow, c.rangehigh);
 690         printxval(v4l2_tuner_rxsubchanses, c.rxsubchans,
 691                   "V4L2_TUNER_SUB_???");
 692         tprints(", audmode=");
 693         printxval(v4l2_tuner_audmodes, c.audmode,
 694                   "V4L2_TUNER_MODE_???");
 695         tprintf(", signal=%d, afc=%d", c.signal, c.afc);
 696
 697         if (entering(tcp)) {
 698                 return 0;
 699         } else {
 700                 tprints("}");
 701                 return RVAL_IOCTL_DECODED;
 702         }
 703 }
 704
 705 #include "xlat/v4l2_control_types.h"
 706 #include "xlat/v4l2_control_flags.h"
 707
 708 static int
 709 print_v4l2_queryctrl(struct tcb *const tcp, const kernel_ulong_t arg)
 710 {
 711         struct v4l2_queryctrl c;
 712
 713         if (entering(tcp)) {
 714                 tprints(", ");
 715                 if (umove_or_printaddr(tcp, arg, &c))
 716                         return RVAL_IOCTL_DECODED;
 717                 tprints("{id=");
 718         } else {
 719                 if (syserror(tcp) || umove(tcp, arg, &c) < 0) {
 720                         tprints("}");
 721                         return RVAL_IOCTL_DECODED;
 722                 }
 723                 if (get_tcb_priv_ulong(tcp))
 724                         tprints(" => ");
 725         }
 726
 727         if (entering(tcp) || get_tcb_priv_ulong(tcp)) {
 728 #ifdef V4L2_CTRL_FLAG_NEXT_CTRL
 729                 const unsigned long next = c.id & V4L2_CTRL_FLAG_NEXT_CTRL;
 730                 set_tcb_priv_ulong(tcp, next);
 731                 if (next) {
 732                         print_xlat(V4L2_CTRL_FLAG_NEXT_CTRL);
 733                         tprints("|");
 734                         c.id &= ~V4L2_CTRL_FLAG_NEXT_CTRL;
 735                 }
 736 #endif
 737                 printxval(v4l2_control_ids, c.id, "V4L2_CID_???");
 738         }
 739
 740         if (exiting(tcp)) {
 741                 tprints(", type=");
 742                 printxval(v4l2_control_types, c.type, "V4L2_CTRL_TYPE_???");
 743                 PRINT_FIELD_CSTRING(", ", c, name);
 744                 tprintf(", minimum=%d, maximum=%d, step=%d"
 745                         ", default_value=%d, flags=",
 746                         c.minimum, c.maximum, c.step, c.default_value);
 747                 printflags(v4l2_control_flags, c.flags, "V4L2_CTRL_FLAG_???");
 748                 tprints("}");
 749         }
 750         return entering(tcp) ? 0 : RVAL_IOCTL_DECODED;
 751 }
 752
 753 static int
 754 print_v4l2_cropcap(struct tcb *const tcp, const kernel_ulong_t arg)
 755 {
 756         struct v4l2_cropcap c;
 757
 758         if (entering(tcp)) {
 759                 tprints(", ");
 760                 if (umove_or_printaddr(tcp, arg, &c))
 761                         return RVAL_IOCTL_DECODED;
 762                 tprints("{type=");
 763                 printxval(v4l2_buf_types, c.type, "V4L2_BUF_TYPE_???");
 764
 765                 return 0;
 766         }
 767
 768         if (!syserror(tcp) && !umove(tcp, arg, &c)) {
 769                 tprintf(", bounds=" FMT_RECT
 770                         ", defrect=" FMT_RECT
 771                         ", pixelaspect=" FMT_FRACT,
 772                         ARGS_RECT(c.bounds),
 773                         ARGS_RECT(c.defrect),
 774                         ARGS_FRACT(c.pixelaspect));
 775         }
 776
 777         tprints("}");
 778
 779         return RVAL_IOCTL_DECODED;
 780 }
 781
 782 static int
 783 print_v4l2_crop(struct tcb *const tcp, const kernel_ulong_t arg,
 784                 const bool is_get)
 785 {
 786         struct v4l2_crop c;
 787
 788         if (entering(tcp)) {
 789                 tprints(", ");
 790                 if (umove_or_printaddr(tcp, arg, &c))
 791                         return RVAL_IOCTL_DECODED;
 792                 tprints("{type=");
 793                 printxval(v4l2_buf_types, c.type, "V4L2_BUF_TYPE_???");
 794                 if (is_get)
 795                         return 0;
 796                 tprintf(", c=" FMT_RECT, ARGS_RECT(c.c));
 797         } else {
 798                 if (!syserror(tcp) && !umove(tcp, arg, &c))
 799                         tprintf(", c=" FMT_RECT, ARGS_RECT(c.c));
 800         }
 801
 802         tprints("}");
 803
 804         return RVAL_IOCTL_DECODED;
 805 }
 806
 807 #ifdef VIDIOC_S_EXT_CTRLS
 808 static bool
 809 print_v4l2_ext_control(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
 810 {
 811         const struct_v4l2_ext_control *p = elem_buf;
 812
 813         tprints("{id=");
 814         printxval(v4l2_control_ids, p->id, "V4L2_CID_???");
 815 # if HAVE_DECL_V4L2_CTRL_TYPE_STRING
 816         tprintf(", size=%u", p->size);
 817         if (p->size > 0) {
 818                 tprints(", string=");
 819                 printstrn(tcp, ptr_to_kulong(p->string), p->size);
 820         } else
 821 # endif
 822         tprintf(", value=%d, value64=%" PRId64, p->value, (int64_t) p->value64);
 823         tprints("}");
 824
 825         return true;
 826 }
 827
 828 #include "xlat/v4l2_control_classes.h"
 829
 830 static int
 831 print_v4l2_ext_controls(struct tcb *const tcp, const kernel_ulong_t arg,
 832                         const bool is_get)
 833 {
 834         struct_v4l2_ext_controls c;
 835
 836         if (entering(tcp)) {
 837                 tprints(", ");
 838                 if (umove_or_printaddr(tcp, arg, &c))
 839                         return RVAL_IOCTL_DECODED;
 840                 tprints("{ctrl_class=");
 841                 printxval(v4l2_control_classes, c.ctrl_class,
 842                           "V4L2_CTRL_CLASS_???");
 843                 tprintf(", count=%u", c.count);
 844                 if (!c.count) {
 845                         tprints("}");
 846                         return RVAL_IOCTL_DECODED;
 847                 }
 848                 if (is_get)
 849                         return 0;
 850                 tprints(", ");
 851         } else {
 852                 if (umove(tcp, arg, &c) < 0) {
 853                         tprints("}");
 854                         return RVAL_IOCTL_DECODED;
 855                 }
 856                 tprints(is_get ? ", " : " => ");
 857         }
 858
 859         tprints("controls=");
 860         struct_v4l2_ext_control ctrl;
 861         bool fail = !print_array(tcp, ptr_to_kulong(c.controls), c.count,
 862                                  &ctrl, sizeof(ctrl),
 863                                  umoven_or_printaddr_ignore_syserror,
 864                                  print_v4l2_ext_control, 0);
 865
 866         if (exiting(tcp) && syserror(tcp))
 867                 tprintf(", error_idx=%u", c.error_idx);
 868
 869         if (exiting(tcp) || fail) {
 870                 tprints("}");
 871                 return RVAL_IOCTL_DECODED;
 872         }
 873
 874         /* entering */
 875         return 0;
 876 }
 877 #endif /* VIDIOC_S_EXT_CTRLS */
 878
 879 #ifdef VIDIOC_ENUM_FRAMESIZES
 880 # include "xlat/v4l2_framesize_types.h"
 881
 882 static int
 883 print_v4l2_frmsizeenum(struct tcb *const tcp, const kernel_ulong_t arg)
 884 {
 885         struct v4l2_frmsizeenum s;
 886
 887         if (entering(tcp)) {
 888                 tprints(", ");
 889                 if (umove_or_printaddr(tcp, arg, &s))
 890                         return RVAL_IOCTL_DECODED;
 891                 tprintf("{index=%u, pixel_format=", s.index);
 892                 print_pixelformat(s.pixel_format, v4l2_pix_fmts);
 893                 return 0;
 894         }
 895
 896         if (!syserror(tcp) && !umove(tcp, arg, &s)) {
 897                 tprints(", type=");
 898                 printxval(v4l2_framesize_types, s.type, "V4L2_FRMSIZE_TYPE_???");
 899                 switch (s.type) {
 900                 case V4L2_FRMSIZE_TYPE_DISCRETE:
 901                         tprintf(", discrete={width=%u, height=%u}",
 902                                 s.discrete.width, s.discrete.height);
 903                         break;
 904                 case V4L2_FRMSIZE_TYPE_STEPWISE:
 905                         tprintf(", stepwise={min_width=%u, max_width=%u, "
 906                                 "step_width=%u, min_height=%u, max_height=%u, "
 907                                 "step_height=%u}",
 908                                 s.stepwise.min_width, s.stepwise.max_width,
 909                                 s.stepwise.step_width, s.stepwise.min_height,
 910                                 s.stepwise.max_height, s.stepwise.step_height);
 911                         break;
 912                 }
 913         }
 914         tprints("}");
 915         return RVAL_IOCTL_DECODED;
 916 }
 917 #endif /* VIDIOC_ENUM_FRAMESIZES */
 918
 919 #ifdef VIDIOC_ENUM_FRAMEINTERVALS
 920 # include "xlat/v4l2_frameinterval_types.h"
 921
 922 static int
 923 print_v4l2_frmivalenum(struct tcb *const tcp, const kernel_ulong_t arg)
 924 {
 925         struct v4l2_frmivalenum f;
 926
 927         if (entering(tcp)) {
 928                 tprints(", ");
 929                 if (umove_or_printaddr(tcp, arg, &f))
 930                         return RVAL_IOCTL_DECODED;
 931                 tprintf("{index=%u, pixel_format=", f.index);
 932                 print_pixelformat(f.pixel_format, v4l2_pix_fmts);
 933                 tprintf(", width=%u, height=%u", f.width, f.height);
 934                 return 0;
 935         }
 936
 937         if (!syserror(tcp) && !umove(tcp, arg, &f)) {
 938                 tprints(", type=");
 939                 printxval(v4l2_frameinterval_types, f.type,
 940                           "V4L2_FRMIVAL_TYPE_???");
 941                 switch (f.type) {
 942                 case V4L2_FRMIVAL_TYPE_DISCRETE:
 943                         tprintf(", discrete=" FMT_FRACT,
 944                                 ARGS_FRACT(f.discrete));
 945                         break;
 946                 case V4L2_FRMIVAL_TYPE_STEPWISE:
 947                 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 948                         tprintf(", stepwise={min=" FMT_FRACT ", max="
 949                                 FMT_FRACT ", step=" FMT_FRACT "}",
 950                                 ARGS_FRACT(f.stepwise.min),
 951                                 ARGS_FRACT(f.stepwise.max),
 952                                 ARGS_FRACT(f.stepwise.step));
 953                         break;
 954                 }
 955         }
 956
 957         tprints("}");
 958
 959         return RVAL_IOCTL_DECODED;
 960 }
 961 #endif /* VIDIOC_ENUM_FRAMEINTERVALS */
 962
 963 #ifdef VIDIOC_CREATE_BUFS
 964 static int
 965 print_v4l2_create_buffers(struct tcb *const tcp, const kernel_ulong_t arg)
 966 {
 967         static const char fmt[] = "{index=%u, count=%u}";
 968         static char outstr[sizeof(fmt) + sizeof(int) * 6];
 969
 970         struct_v4l2_create_buffers b;
 971
 972         if (entering(tcp)) {
 973                 tprints(", ");
 974                 if (umove_or_printaddr(tcp, arg, &b))
 975                         return RVAL_IOCTL_DECODED;
 976                 tprintf("{count=%u, memory=", b.count);
 977                 printxval(v4l2_memories, b.memory, "V4L2_MEMORY_???");
 978                 tprints(", format={type=");
 979                 printxval(v4l2_buf_types, b.format.type,
 980                           "V4L2_BUF_TYPE_???");
 981                 print_v4l2_format_fmt(tcp, ", ",
 982                                       (struct_v4l2_format *) &b.format);
 983                 tprints("}}");
 984                 return 0;
 985         }
 986
 987         if (syserror(tcp) || umove(tcp, arg, &b))
 988                 return RVAL_IOCTL_DECODED;
 989
 990         xsprintf(outstr, fmt, b.index, b.count);
 991         tcp->auxstr = outstr;
 992
 993         return RVAL_IOCTL_DECODED | RVAL_STR;
 994 }
 995 #endif /* VIDIOC_CREATE_BUFS */
 996
 997 MPERS_PRINTER_DECL(int, v4l2_ioctl, struct tcb *const tcp,
 998                    const unsigned int code, const kernel_ulong_t arg)
 999 {
1000         if (!verbose(tcp))
1001                 return RVAL_DECODED;
1002
1003         switch (code) {
1004         case VIDIOC_QUERYCAP: /* R */
1005                 return print_v4l2_capability(tcp, arg);
1006
1007         case VIDIOC_ENUM_FMT: /* RW */
1008                 return print_v4l2_fmtdesc(tcp, arg);
1009
1010         case VIDIOC_G_FMT: /* RW */
1011         case VIDIOC_S_FMT: /* RW */
1012         case VIDIOC_TRY_FMT: /* RW */
1013                 return print_v4l2_format(tcp, arg, code == VIDIOC_G_FMT);
1014
1015         case VIDIOC_REQBUFS: /* RW */
1016                 return print_v4l2_requestbuffers(tcp, arg);
1017
1018         case VIDIOC_QUERYBUF: /* RW */
1019         case VIDIOC_QBUF: /* RW */
1020         case VIDIOC_DQBUF: /* RW */
1021                 return print_v4l2_buffer(tcp, code, arg);
1022
1023         case VIDIOC_G_FBUF: /* R */
1024                 if (entering(tcp))
1025                         return 0;
1026                 ATTRIBUTE_FALLTHROUGH;
1027         case VIDIOC_S_FBUF: /* W */
1028                 return print_v4l2_framebuffer(tcp, arg);
1029
1030         case VIDIOC_STREAMON: /* W */
1031         case VIDIOC_STREAMOFF: /* W */
1032                 return print_v4l2_buf_type(tcp, arg);
1033
1034         case VIDIOC_G_PARM: /* RW */
1035         case VIDIOC_S_PARM: /* RW */
1036                 return print_v4l2_streamparm(tcp, arg, code == VIDIOC_G_PARM);
1037
1038         case VIDIOC_G_STD: /* R */
1039                 if (entering(tcp))
1040                         return 0;
1041                 ATTRIBUTE_FALLTHROUGH;
1042         case VIDIOC_S_STD: /* W */
1043                 tprints(", ");
1044                 printnum_int64(tcp, arg, "%#" PRIx64);
1045                 break;
1046
1047         case VIDIOC_ENUMSTD: /* RW */
1048                 return print_v4l2_standard(tcp, arg);
1049
1050         case VIDIOC_ENUMINPUT: /* RW */
1051                 return print_v4l2_input(tcp, arg);
1052
1053         case VIDIOC_G_CTRL: /* RW */
1054         case VIDIOC_S_CTRL: /* RW */
1055                 return print_v4l2_control(tcp, arg, code == VIDIOC_G_CTRL);
1056
1057         case VIDIOC_G_TUNER: /* RW */
1058         case VIDIOC_S_TUNER: /* RW */
1059                 return print_v4l2_tuner(tcp, arg, code == VIDIOC_G_TUNER);
1060
1061         case VIDIOC_QUERYCTRL: /* RW */
1062                 return print_v4l2_queryctrl(tcp, arg);
1063
1064         case VIDIOC_G_INPUT: /* R */
1065                 if (entering(tcp))
1066                         return 0;
1067                 ATTRIBUTE_FALLTHROUGH;
1068         case VIDIOC_S_INPUT: /* RW */
1069                 tprints(", ");
1070                 printnum_int(tcp, arg, "%u");
1071                 break;
1072
1073         case VIDIOC_CROPCAP: /* RW */
1074                 return print_v4l2_cropcap(tcp, arg);
1075
1076         case VIDIOC_G_CROP: /* RW */
1077         case VIDIOC_S_CROP: /* W */
1078                 return print_v4l2_crop(tcp, arg, code == VIDIOC_G_CROP);
1079
1080 #ifdef VIDIOC_S_EXT_CTRLS
1081         case VIDIOC_S_EXT_CTRLS: /* RW */
1082         case VIDIOC_TRY_EXT_CTRLS: /* RW */
1083         case VIDIOC_G_EXT_CTRLS: /* RW */
1084                 return print_v4l2_ext_controls(tcp, arg,
1085                                                code == VIDIOC_G_EXT_CTRLS);
1086 #endif /* VIDIOC_S_EXT_CTRLS */
1087
1088 #ifdef VIDIOC_ENUM_FRAMESIZES
1089         case VIDIOC_ENUM_FRAMESIZES: /* RW */
1090                 return print_v4l2_frmsizeenum(tcp, arg);
1091 #endif /* VIDIOC_ENUM_FRAMESIZES */
1092
1093 #ifdef VIDIOC_ENUM_FRAMEINTERVALS
1094         case VIDIOC_ENUM_FRAMEINTERVALS: /* RW */
1095                 return print_v4l2_frmivalenum(tcp, arg);
1096 #endif /* VIDIOC_ENUM_FRAMEINTERVALS */
1097
1098 #ifdef VIDIOC_CREATE_BUFS
1099         case VIDIOC_CREATE_BUFS: /* RW */
1100                 return print_v4l2_create_buffers(tcp, arg);
1101 #endif /* VIDIOC_CREATE_BUFS */
1102
1103         default:
1104                 return RVAL_DECODED;
1105         }
1106
1107         return RVAL_IOCTL_DECODED;
1108 }