gstv4l2object.c 72.7 KB
Newer Older
1 2
/* GStreamer
 *
3
 * Copyright (C) 2001-2002 Ronald Bultje <rbultje@ronald.bitfreak.net>
4 5 6
 *               2006 Edgard Lima <edgard.lima@indt.org.br>
 *
 * gstv4l2object.c: base class for V4L2 elements
7 8 9 10 11 12 13 14 15 16 17
 *
 * This library is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Library General Public License as published
 * by the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version. This library is distributed in the hope
 * that it will be useful, but WITHOUT ANY WARRANTY; without even the
 * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 * PURPOSE.  See the GNU Library General Public License for more details.
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
Rob Clark's avatar
Rob Clark committed
18
 * USA.
19 20
 */

21 22 23 24
/* FIXME 0.11: suppress warnings for deprecated API such as GValueArray
 * with newer GLib versions (>= 2.31.0) */
#define GLIB_DISABLE_DEPRECATION_WARNINGS

25 26 27 28 29 30 31 32 33 34
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <unistd.h>
#include <string.h>

35 36 37 38
#ifdef HAVE_GUDEV
#include <gudev/gudev.h>
#endif

39 40
#include "v4l2_calls.h"
#include "gstv4l2tuner.h"
Rob Clark's avatar
Rob Clark committed
41
#ifdef HAVE_XVIDEO
42
#include "gstv4l2videooverlay.h"
43 44 45
#endif
#include "gstv4l2colorbalance.h"

Rob Clark's avatar
Rob Clark committed
46 47
#include "gst/gst-i18n-plugin.h"

48 49
#include <gst/video/video.h>

50 51 52 53 54 55 56
/* videodev2.h is not versioned and we can't easily check for the presence
 * of enum values at compile time, but the V4L2_CAP_VIDEO_OUTPUT_OVERLAY define
 * was added in the same commit as V4L2_FIELD_INTERLACED_{TB,BT} (b2787845) */
#ifndef V4L2_CAP_VIDEO_OUTPUT_OVERLAY
#define V4L2_FIELD_INTERLACED_TB 8
#define V4L2_FIELD_INTERLACED_BT 9
#endif
Rob Clark's avatar
Rob Clark committed
57 58

GST_DEBUG_CATEGORY_EXTERN (v4l2_debug);
59
GST_DEBUG_CATEGORY_EXTERN (GST_CAT_PERFORMANCE);
Rob Clark's avatar
Rob Clark committed
60 61
#define GST_CAT_DEFAULT v4l2_debug

62
#define DEFAULT_PROP_DEVICE_NAME 	NULL
63
#define DEFAULT_PROP_DEVICE_FD          -1
64
#define DEFAULT_PROP_FLAGS              0
Rob Clark's avatar
Rob Clark committed
65
#define DEFAULT_PROP_TV_NORM            0
66
#define DEFAULT_PROP_CHANNEL            NULL
67
#define DEFAULT_PROP_FREQUENCY          0
Wim Taymans's avatar
Wim Taymans committed
68
#define DEFAULT_PROP_IO_MODE            GST_V4L2_IO_AUTO
69

Stefan Kost's avatar
Stefan Kost committed
70 71 72 73 74 75
enum
{
  PROP_0,
  V4L2_STD_OBJECT_PROPS,
};

76
#if 0
Wim Taymans's avatar
Wim Taymans committed
77 78
G_LOCK_DEFINE_STATIC (probe_lock);

Stefan Kost's avatar
Stefan Kost committed
79
const GList *
80 81 82 83 84
gst_v4l2_probe_get_properties (GstPropertyProbe * probe)
{
  GObjectClass *klass = G_OBJECT_GET_CLASS (probe);
  static GList *list = NULL;

Wim Taymans's avatar
Wim Taymans committed
85
  G_LOCK (probe_lock);
86 87 88 89 90

  if (!list) {
    list = g_list_append (NULL, g_object_class_find_property (klass, "device"));
  }

Wim Taymans's avatar
Wim Taymans committed
91
  G_UNLOCK (probe_lock);
92 93 94 95

  return list;
}

96 97 98 99
static gboolean init = FALSE;
static GList *devices = NULL;

#ifdef HAVE_GUDEV
100
static gboolean
101
gst_v4l2_class_probe_devices_with_udev (GstElementClass * klass, gboolean check,
102 103
    GList ** klass_devices)
{
104
  GUdevClient *client = NULL;
105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151
  GList *item;

  if (!check) {
    while (devices) {
      gchar *device = devices->data;
      devices = g_list_remove (devices, device);
      g_free (device);
    }

    GST_INFO ("Enumerating video4linux devices from udev");
    client = g_udev_client_new (NULL);
    if (!client) {
      GST_WARNING ("Failed to initialize gudev client");
      goto finish;
    }

    item = g_udev_client_query_by_subsystem (client, "video4linux");
    while (item) {
      GUdevDevice *device = item->data;
      gchar *devnode = g_strdup (g_udev_device_get_device_file (device));
      gint api = g_udev_device_get_property_as_int (device, "ID_V4L_VERSION");
      GST_INFO ("Found new device: %s, API: %d", devnode, api);
      /* Append v4l2 devices only. If api is 0 probably v4l_id has
         been stripped out of the current udev installation, append
         anyway */
      if (api == 0) {
        GST_WARNING
            ("Couldn't retrieve ID_V4L_VERSION, silly udev installation?");
      }
      if ((api == 2 || api == 0)) {
        devices = g_list_append (devices, devnode);
      } else {
        g_free (devnode);
      }
      g_object_unref (device);
      item = item->next;
    }
    g_list_free (item);
    init = TRUE;
  }

finish:
  if (client) {
    g_object_unref (client);
  }

  *klass_devices = devices;
152

153 154 155 156 157 158 159 160
  return init;
}
#endif /* HAVE_GUDEV */

static gboolean
gst_v4l2_class_probe_devices (GstElementClass * klass, gboolean check,
    GList ** klass_devices)
{
161
  if (!check) {
Stefan Kost's avatar
Stefan Kost committed
162
    const gchar *dev_base[] = { "/dev/video", "/dev/v4l2/video", NULL };
163 164 165
    gint base, n, fd;

    while (devices) {
166
      gchar *device = devices->data;
167
      devices = g_list_remove (devices, device);
168 169 170 171
      g_free (device);
    }

    /*
Rob Clark's avatar
Rob Clark committed
172
     * detect /dev entries
173 174 175 176 177 178 179 180 181
     */
    for (n = 0; n < 64; n++) {
      for (base = 0; dev_base[base] != NULL; base++) {
        struct stat s;
        gchar *device = g_strdup_printf ("%s%d",
            dev_base[base],
            n);

        /*
Rob Clark's avatar
Rob Clark committed
182
         * does the /dev/ entry exist at all?
183 184 185
         */
        if (stat (device, &s) == 0) {
          /*
Rob Clark's avatar
Rob Clark committed
186
           * yes: is a device attached?
187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217
           */
          if (S_ISCHR (s.st_mode)) {

            if ((fd = open (device, O_RDWR | O_NONBLOCK)) > 0 || errno == EBUSY) {
              if (fd > 0)
                close (fd);

              devices = g_list_append (devices, device);
              break;
            }
          }
        }
        g_free (device);
      }
    }
    init = TRUE;
  }

  *klass_devices = devices;

  return init;
}

void
gst_v4l2_probe_probe_property (GstPropertyProbe * probe,
    guint prop_id, const GParamSpec * pspec, GList ** klass_devices)
{
  GstElementClass *klass = GST_ELEMENT_GET_CLASS (probe);

  switch (prop_id) {
    case PROP_DEVICE:
218 219 220 221
#ifdef HAVE_GUDEV
      if (!gst_v4l2_class_probe_devices_with_udev (klass, FALSE, klass_devices))
        gst_v4l2_class_probe_devices (klass, FALSE, klass_devices);
#else /* !HAVE_GUDEV */
222
      gst_v4l2_class_probe_devices (klass, FALSE, klass_devices);
223
#endif /* HAVE_GUDEV */
224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (probe, prop_id, pspec);
      break;
  }
}

gboolean
gst_v4l2_probe_needs_probe (GstPropertyProbe * probe,
    guint prop_id, const GParamSpec * pspec, GList ** klass_devices)
{
  GstElementClass *klass = GST_ELEMENT_GET_CLASS (probe);
  gboolean ret = FALSE;

  switch (prop_id) {
    case PROP_DEVICE:
240 241 242 243
#ifdef HAVE_GUDEV
      ret =
          !gst_v4l2_class_probe_devices_with_udev (klass, FALSE, klass_devices);
#else /* !HAVE_GUDEV */
244
      ret = !gst_v4l2_class_probe_devices (klass, TRUE, klass_devices);
245
#endif /* HAVE_GUDEV */
246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (probe, prop_id, pspec);
      break;
  }
  return ret;
}

static GValueArray *
gst_v4l2_class_list_devices (GstElementClass * klass, GList ** klass_devices)
{
  GValueArray *array;
  GValue value = { 0 };
  GList *item;

  if (!*klass_devices)
    return NULL;

  array = g_value_array_new (g_list_length (*klass_devices));
  item = *klass_devices;
  g_value_init (&value, G_TYPE_STRING);
  while (item) {
    gchar *device = item->data;

    g_value_set_string (&value, device);
    g_value_array_append (array, &value);

    item = item->next;
  }
  g_value_unset (&value);

  return array;
}

GValueArray *
gst_v4l2_probe_get_values (GstPropertyProbe * probe,
    guint prop_id, const GParamSpec * pspec, GList ** klass_devices)
{
  GstElementClass *klass = GST_ELEMENT_GET_CLASS (probe);
  GValueArray *array = NULL;

  switch (prop_id) {
    case PROP_DEVICE:
      array = gst_v4l2_class_list_devices (klass, klass_devices);
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (probe, prop_id, pspec);
      break;
  }

  return array;
}
298
#endif
299 300

#define GST_TYPE_V4L2_DEVICE_FLAGS (gst_v4l2_device_get_type ())
301
static GType
302 303 304 305 306 307
gst_v4l2_device_get_type (void)
{
  static GType v4l2_device_type = 0;

  if (v4l2_device_type == 0) {
    static const GFlagsValue values[] = {
308 309 310 311 312 313 314 315 316
      {V4L2_CAP_VIDEO_CAPTURE, "Device supports video capture", "capture"},
      {V4L2_CAP_VIDEO_OUTPUT, "Device supports video playback", "output"},
      {V4L2_CAP_VIDEO_OVERLAY, "Device supports video overlay", "overlay"},

      {V4L2_CAP_VBI_CAPTURE, "Device supports the VBI capture", "vbi-capture"},
      {V4L2_CAP_VBI_OUTPUT, "Device supports the VBI output", "vbi-output"},

      {V4L2_CAP_TUNER, "Device has a tuner or modulator", "tuner"},
      {V4L2_CAP_AUDIO, "Device has audio inputs or outputs", "audio"},
317 318 319 320 321 322 323 324 325 326 327

      {0, NULL, NULL}
    };

    v4l2_device_type =
        g_flags_register_static ("GstV4l2DeviceTypeFlags", values);
  }

  return v4l2_device_type;
}

Rob Clark's avatar
Rob Clark committed
328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379
#define GST_TYPE_V4L2_TV_NORM (gst_v4l2_tv_norm_get_type ())
static GType
gst_v4l2_tv_norm_get_type (void)
{
  static GType v4l2_tv_norm = 0;

  if (!v4l2_tv_norm) {
    static const GEnumValue tv_norms[] = {
      {0, "none", "none"},

      {V4L2_STD_NTSC, "NTSC", "NTSC"},
      {V4L2_STD_NTSC_M, "NTSC-M", "NTSC-M"},
      {V4L2_STD_NTSC_M_JP, "NTSC-M-JP", "NTSC-M-JP"},
      {V4L2_STD_NTSC_M_KR, "NTSC-M-KR", "NTSC-M-KR"},
      {V4L2_STD_NTSC_443, "NTSC-443", "NTSC-443"},

      {V4L2_STD_PAL, "PAL", "PAL"},
      {V4L2_STD_PAL_BG, "PAL-BG", "PAL-BG"},
      {V4L2_STD_PAL_B, "PAL-B", "PAL-B"},
      {V4L2_STD_PAL_B1, "PAL-B1", "PAL-B1"},
      {V4L2_STD_PAL_G, "PAL-G", "PAL-G"},
      {V4L2_STD_PAL_H, "PAL-H", "PAL-H"},
      {V4L2_STD_PAL_I, "PAL-I", "PAL-I"},
      {V4L2_STD_PAL_DK, "PAL-DK", "PAL-DK"},
      {V4L2_STD_PAL_D, "PAL-D", "PAL-D"},
      {V4L2_STD_PAL_D1, "PAL-D1", "PAL-D1"},
      {V4L2_STD_PAL_K, "PAL-K", "PAL-K"},
      {V4L2_STD_PAL_M, "PAL-M", "PAL-M"},
      {V4L2_STD_PAL_N, "PAL-N", "PAL-N"},
      {V4L2_STD_PAL_Nc, "PAL-Nc", "PAL-Nc"},
      {V4L2_STD_PAL_60, "PAL-60", "PAL-60"},

      {V4L2_STD_SECAM, "SECAM", "SECAM"},
      {V4L2_STD_SECAM_B, "SECAM-B", "SECAM-B"},
      {V4L2_STD_SECAM_G, "SECAM-G", "SECAM-G"},
      {V4L2_STD_SECAM_H, "SECAM-H", "SECAM-H"},
      {V4L2_STD_SECAM_DK, "SECAM-DK", "SECAM-DK"},
      {V4L2_STD_SECAM_D, "SECAM-D", "SECAM-D"},
      {V4L2_STD_SECAM_K, "SECAM-K", "SECAM-K"},
      {V4L2_STD_SECAM_K1, "SECAM-K1", "SECAM-K1"},
      {V4L2_STD_SECAM_L, "SECAM-L", "SECAM-L"},
      {V4L2_STD_SECAM_LC, "SECAM-Lc", "SECAM-Lc"},

      {0, NULL, NULL}
    };

    v4l2_tv_norm = g_enum_register_static ("V4L2_TV_norms", tv_norms);
  }

  return v4l2_tv_norm;
}

Wim Taymans's avatar
Wim Taymans committed
380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399
#define GST_TYPE_V4L2_IO_MODE (gst_v4l2_io_mode_get_type ())
static GType
gst_v4l2_io_mode_get_type (void)
{
  static GType v4l2_io_mode = 0;

  if (!v4l2_io_mode) {
    static const GEnumValue io_modes[] = {
      {GST_V4L2_IO_AUTO, "GST_V4L2_IO_AUTO", "auto"},
      {GST_V4L2_IO_RW, "GST_V4L2_IO_RW", "rw"},
      {GST_V4L2_IO_MMAP, "GST_V4L2_IO_MMAP", "mmap"},
      {GST_V4L2_IO_USERPTR, "GST_V4L2_IO_USERPTR", "userptr"},

      {0, NULL, NULL}
    };
    v4l2_io_mode = g_enum_register_static ("GstV4l2IOMode", io_modes);
  }
  return v4l2_io_mode;
}

400
void
Rob Clark's avatar
Rob Clark committed
401 402
gst_v4l2_object_install_properties_helper (GObjectClass * gobject_class,
    const char *default_device)
403
{
404 405
  g_object_class_install_property (gobject_class, PROP_DEVICE,
      g_param_spec_string ("device", "Device", "Device location",
406
          default_device, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
407 408
  g_object_class_install_property (gobject_class, PROP_DEVICE_NAME,
      g_param_spec_string ("device-name", "Device name",
409 410
          "Name of the device", DEFAULT_PROP_DEVICE_NAME,
          G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
411 412 413
  g_object_class_install_property (gobject_class, PROP_DEVICE_FD,
      g_param_spec_int ("device-fd", "File descriptor",
          "File descriptor of the device", -1, G_MAXINT, DEFAULT_PROP_DEVICE_FD,
414
          G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
415 416
  g_object_class_install_property (gobject_class, PROP_FLAGS,
      g_param_spec_flags ("flags", "Flags", "Device type flags",
417 418
          GST_TYPE_V4L2_DEVICE_FLAGS, DEFAULT_PROP_FLAGS,
          G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
419

420 421 422 423 424 425 426
  /**
   * GstV4l2Src:brightness
   *
   * Picture brightness, or more precisely, the black level
   *
   * Since: 0.10.26
   */
427 428 429 430 431
  g_object_class_install_property (gobject_class, PROP_BRIGHTNESS,
      g_param_spec_int ("brightness", "Brightness",
          "Picture brightness, or more precisely, the black level", G_MININT,
          G_MAXINT, 0,
          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
432 433 434 435 436 437 438
  /**
   * GstV4l2Src:contrast
   *
   * Picture contrast or luma gain
   *
   * Since: 0.10.26
   */
439 440 441 442 443
  g_object_class_install_property (gobject_class, PROP_CONTRAST,
      g_param_spec_int ("contrast", "Contrast",
          "Picture contrast or luma gain", G_MININT,
          G_MAXINT, 0,
          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
444 445 446 447 448 449 450
  /**
   * GstV4l2Src:saturation
   *
   * Picture color saturation or chroma gain
   *
   * Since: 0.10.26
   */
451 452 453 454 455
  g_object_class_install_property (gobject_class, PROP_SATURATION,
      g_param_spec_int ("saturation", "Saturation",
          "Picture color saturation or chroma gain", G_MININT,
          G_MAXINT, 0,
          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
456 457 458 459 460 461 462
  /**
   * GstV4l2Src:hue
   *
   * Hue or color balance
   *
   * Since: 0.10.26
   */
463 464 465 466 467
  g_object_class_install_property (gobject_class, PROP_HUE,
      g_param_spec_int ("hue", "Hue",
          "Hue or color balance", G_MININT,
          G_MAXINT, 0,
          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
Rob Clark's avatar
Rob Clark committed
468 469 470 471 472 473

  /**
   * GstV4l2Src:norm
   *
   * TV norm
   *
474
   * Since: 0.10.31
Rob Clark's avatar
Rob Clark committed
475 476 477 478 479 480
   */
  g_object_class_install_property (gobject_class, PROP_TV_NORM,
      g_param_spec_enum ("norm", "TV norm",
          "video standard",
          GST_TYPE_V4L2_TV_NORM, DEFAULT_PROP_TV_NORM,
          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
Wim Taymans's avatar
Wim Taymans committed
481 482 483 484 485 486 487 488 489 490 491

  /**
   * GstV4l2Src:io-mode
   *
   * IO Mode
   */
  g_object_class_install_property (gobject_class, PROP_IO_MODE,
      g_param_spec_enum ("io-mode", "IO mode",
          "I/O mode",
          GST_TYPE_V4L2_IO_MODE, DEFAULT_PROP_IO_MODE,
          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
492 493 494
}

GstV4l2Object *
495
gst_v4l2_object_new (GstElement * element,
Rob Clark's avatar
Rob Clark committed
496
    enum v4l2_buf_type type,
497
    const char *default_device,
498
    GstV4l2GetInOutFunction get_in_out_func,
499 500
    GstV4l2SetInOutFunction set_in_out_func,
    GstV4l2UpdateFpsFunction update_fps_func)
501 502 503 504
{
  GstV4l2Object *v4l2object;

  /*
Rob Clark's avatar
Rob Clark committed
505
   * some default values
506 507 508
   */
  v4l2object = g_new0 (GstV4l2Object, 1);

Rob Clark's avatar
Rob Clark committed
509 510 511
  v4l2object->type = type;
  v4l2object->formats = NULL;

512 513 514
  v4l2object->element = element;
  v4l2object->get_in_out_func = get_in_out_func;
  v4l2object->set_in_out_func = set_in_out_func;
515
  v4l2object->update_fps_func = update_fps_func;
516 517

  v4l2object->video_fd = -1;
518
  v4l2object->poll = gst_poll_new (TRUE);
519
  v4l2object->active = FALSE;
Rob Clark's avatar
Rob Clark committed
520
  v4l2object->videodev = g_strdup (default_device);
521

522 523
  v4l2object->norms = NULL;
  v4l2object->channels = NULL;
524 525 526 527 528 529 530
  v4l2object->colors = NULL;

  v4l2object->xwindow_id = 0;

  return v4l2object;
}

Rob Clark's avatar
Rob Clark committed
531 532 533
static gboolean gst_v4l2_object_clear_format_list (GstV4l2Object * v4l2object);


534
void
535
gst_v4l2_object_destroy (GstV4l2Object * v4l2object)
536
{
537
  g_return_if_fail (v4l2object != NULL);
538

539 540 541
  if (v4l2object->videodev)
    g_free (v4l2object->videodev);

542 543 544
  if (v4l2object->poll)
    gst_poll_free (v4l2object->poll);

545 546 547
  if (v4l2object->channel)
    g_free (v4l2object->channel);

Rob Clark's avatar
Rob Clark committed
548 549 550 551
  if (v4l2object->formats) {
    gst_v4l2_object_clear_format_list (v4l2object);
  }

552
  g_free (v4l2object);
553 554
}

Rob Clark's avatar
Rob Clark committed
555 556 557 558 559 560 561 562 563 564 565

static gboolean
gst_v4l2_object_clear_format_list (GstV4l2Object * v4l2object)
{
  g_slist_foreach (v4l2object->formats, (GFunc) g_free, NULL);
  g_slist_free (v4l2object->formats);
  v4l2object->formats = NULL;

  return TRUE;
}

566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589
static gint
gst_v4l2_object_prop_to_cid (guint prop_id)
{
  gint cid = -1;

  switch (prop_id) {
    case PROP_BRIGHTNESS:
      cid = V4L2_CID_BRIGHTNESS;
      break;
    case PROP_CONTRAST:
      cid = V4L2_CID_CONTRAST;
      break;
    case PROP_SATURATION:
      cid = V4L2_CID_SATURATION;
      break;
    case PROP_HUE:
      cid = V4L2_CID_HUE;
      break;
    default:
      GST_WARNING ("unmapped property id: %d", prop_id);
  }
  return cid;
}

Rob Clark's avatar
Rob Clark committed
590

591
gboolean
592
gst_v4l2_object_set_property_helper (GstV4l2Object * v4l2object,
593 594 595 596
    guint prop_id, const GValue * value, GParamSpec * pspec)
{
  switch (prop_id) {
    case PROP_DEVICE:
Wim Taymans's avatar
Wim Taymans committed
597
      g_free (v4l2object->videodev);
598
      v4l2object->videodev = g_value_dup_string (value);
599
      break;
600 601 602 603 604 605 606 607 608 609 610 611 612 613 614
    case PROP_BRIGHTNESS:
    case PROP_CONTRAST:
    case PROP_SATURATION:
    case PROP_HUE:
    {
      gint cid = gst_v4l2_object_prop_to_cid (prop_id);

      if (cid != -1) {
        if (GST_V4L2_IS_OPEN (v4l2object)) {
          gst_v4l2_set_attribute (v4l2object, cid, g_value_get_int (value));
        }
      }
      return TRUE;
    }
      break;
Rob Clark's avatar
Rob Clark committed
615 616
    case PROP_TV_NORM:
      v4l2object->tv_norm = g_value_get_enum (value);
617
      break;
Rob Clark's avatar
Rob Clark committed
618
#if 0
619
    case PROP_CHANNEL:
620 621 622
      if (GST_V4L2_IS_OPEN (v4l2object)) {
        GstTuner *tuner = GST_TUNER (v4l2object->element);
        GstTunerChannel *channel = gst_tuner_find_channel_by_name (tuner,
623
            (gchar *) g_value_get_string (value));
624 625 626 627 628 629 630

        if (channel) {
          /* like gst_tuner_set_channel (tuner, channel)
             without g_object_notify */
          gst_v4l2_tuner_set_channel (v4l2object, channel);
        }
      } else {
631 632
        g_free (v4l2object->channel);
        v4l2object->channel = g_value_dup_string (value);
633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651
      }
      break;
    case PROP_FREQUENCY:
      if (GST_V4L2_IS_OPEN (v4l2object)) {
        GstTuner *tuner = GST_TUNER (v4l2object->element);
        GstTunerChannel *channel = gst_tuner_get_channel (tuner);

        if (channel &&
            GST_TUNER_CHANNEL_HAS_FLAG (channel, GST_TUNER_CHANNEL_FREQUENCY)) {
          /* like
             gst_tuner_set_frequency (tuner, channel, g_value_get_ulong (value))
             without g_object_notify */
          gst_v4l2_tuner_set_frequency (v4l2object, channel,
              g_value_get_ulong (value));
        }
      } else {
        v4l2object->frequency = g_value_get_ulong (value);
      }
      break;
652
#endif
Wim Taymans's avatar
Wim Taymans committed
653 654 655
    case PROP_IO_MODE:
      v4l2object->req_mode = g_value_get_enum (value);
      break;
656 657 658 659 660 661 662 663 664
    default:
      return FALSE;
      break;
  }
  return TRUE;
}


gboolean
665
gst_v4l2_object_get_property_helper (GstV4l2Object * v4l2object,
666 667 668 669 670 671 672 673
    guint prop_id, GValue * value, GParamSpec * pspec)
{
  switch (prop_id) {
    case PROP_DEVICE:
      g_value_set_string (value, v4l2object->videodev);
      break;
    case PROP_DEVICE_NAME:
    {
674
      const guchar *new = NULL;
675

676
      if (GST_V4L2_IS_OPEN (v4l2object)) {
677
        new = v4l2object->vcap.card;
678
      } else if (gst_v4l2_open (v4l2object)) {
679
        new = v4l2object->vcap.card;
680 681
        gst_v4l2_close (v4l2object);
      }
682
      g_value_set_string (value, (gchar *) new);
683 684
      break;
    }
685 686 687 688 689 690 691 692
    case PROP_DEVICE_FD:
    {
      if (GST_V4L2_IS_OPEN (v4l2object))
        g_value_set_int (value, v4l2object->video_fd);
      else
        g_value_set_int (value, DEFAULT_PROP_DEVICE_FD);
      break;
    }
693 694 695 696 697 698 699 700
    case PROP_FLAGS:
    {
      guint flags = 0;

      if (GST_V4L2_IS_OPEN (v4l2object)) {
        flags |= v4l2object->vcap.capabilities &
            (V4L2_CAP_VIDEO_CAPTURE |
            V4L2_CAP_VIDEO_OUTPUT |
Edgard Lima's avatar
Edgard Lima committed
701 702 703
            V4L2_CAP_VIDEO_OVERLAY |
            V4L2_CAP_VBI_CAPTURE |
            V4L2_CAP_VBI_OUTPUT | V4L2_CAP_TUNER | V4L2_CAP_AUDIO);
704 705 706 707
      }
      g_value_set_flags (value, flags);
      break;
    }
708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725
    case PROP_BRIGHTNESS:
    case PROP_CONTRAST:
    case PROP_SATURATION:
    case PROP_HUE:
    {
      gint cid = gst_v4l2_object_prop_to_cid (prop_id);

      if (cid != -1) {
        if (GST_V4L2_IS_OPEN (v4l2object)) {
          gint v;
          if (gst_v4l2_get_attribute (v4l2object, cid, &v)) {
            g_value_set_int (value, v);
          }
        }
      }
      return TRUE;
    }
      break;
Rob Clark's avatar
Rob Clark committed
726 727 728
    case PROP_TV_NORM:
      g_value_set_enum (value, v4l2object->tv_norm);
      break;
Wim Taymans's avatar
Wim Taymans committed
729 730 731
    case PROP_IO_MODE:
      g_value_set_enum (value, v4l2object->req_mode);
      break;
732 733 734 735 736 737 738 739 740 741 742 743
    default:
      return FALSE;
      break;
  }
  return TRUE;
}

static void
gst_v4l2_set_defaults (GstV4l2Object * v4l2object)
{
  GstTunerNorm *norm = NULL;
  GstTunerChannel *channel = NULL;
Rob Clark's avatar
Rob Clark committed
744 745 746 747 748 749
  GstTuner *tuner;

  if (!GST_IS_TUNER (v4l2object->element))
    return;

  tuner = GST_TUNER (v4l2object->element);
750

Rob Clark's avatar
Rob Clark committed
751 752
  if (v4l2object->tv_norm)
    norm = gst_v4l2_tuner_get_norm_by_std_id (v4l2object, v4l2object->tv_norm);
753 754
  GST_DEBUG_OBJECT (v4l2object->element, "tv_norm=0x%" G_GINT64_MODIFIER "x, "
      "norm=%p", (guint64) v4l2object->tv_norm, norm);
755 756 757 758 759 760
  if (norm) {
    gst_tuner_set_norm (tuner, norm);
  } else {
    norm =
        GST_TUNER_NORM (gst_tuner_get_norm (GST_TUNER (v4l2object->element)));
    if (norm) {
Rob Clark's avatar
Rob Clark committed
761 762
      v4l2object->tv_norm =
          gst_v4l2_tuner_get_std_id_by_norm (v4l2object, norm);
763 764 765 766
      gst_tuner_norm_changed (tuner, norm);
    }
  }

767 768
  if (v4l2object->channel)
    channel = gst_tuner_find_channel_by_name (tuner, v4l2object->channel);
769 770 771 772
  if (channel) {
    gst_tuner_set_channel (tuner, channel);
  } else {
    channel =
773 774
        GST_TUNER_CHANNEL (gst_tuner_get_channel (GST_TUNER
            (v4l2object->element)));
775 776 777 778 779
    if (channel) {
      g_free (v4l2object->channel);
      v4l2object->channel = g_strdup (channel->label);
      gst_tuner_channel_changed (tuner, channel);
    }
780 781
  }

782 783
  if (channel
      && GST_TUNER_CHANNEL_HAS_FLAG (channel, GST_TUNER_CHANNEL_FREQUENCY)) {
784 785 786 787 788 789 790 791 792 793 794 795 796 797
    if (v4l2object->frequency != 0) {
      gst_tuner_set_frequency (tuner, channel, v4l2object->frequency);
    } else {
      v4l2object->frequency = gst_tuner_get_frequency (tuner, channel);
      if (v4l2object->frequency == 0) {
        /* guess */
        gst_tuner_set_frequency (tuner, channel, 1000);
      } else {
      }
    }
  }
}

gboolean
798
gst_v4l2_object_open (GstV4l2Object * v4l2object)
799 800 801 802 803 804
{
  if (gst_v4l2_open (v4l2object))
    gst_v4l2_set_defaults (v4l2object);
  else
    return FALSE;

Rob Clark's avatar
Rob Clark committed
805
#ifdef HAVE_XVIDEO
806
  gst_v4l2_video_overlay_start (v4l2object);
807 808 809 810 811 812
#endif

  return TRUE;
}

gboolean
813
gst_v4l2_object_close (GstV4l2Object * v4l2object)
814
{
Rob Clark's avatar
Rob Clark committed
815
#ifdef HAVE_XVIDEO
816
  gst_v4l2_video_overlay_stop (v4l2object);
817 818 819 820 821
#endif

  if (!gst_v4l2_close (v4l2object))
    return FALSE;

822 823 824 825
  if (v4l2object->formats) {
    gst_v4l2_object_clear_format_list (v4l2object);
  }

826 827
  return TRUE;
}
Rob Clark's avatar
Rob Clark committed
828 829 830 831 832


/*
 * common format / caps utilities:
 */
833 834 835 836 837
typedef struct
{
  guint32 format;
  gboolean dimensions;
} GstV4L2FormatDesc;
Rob Clark's avatar
Rob Clark committed
838

839
static const GstV4L2FormatDesc gst_v4l2_formats[] = {
Rob Clark's avatar
Rob Clark committed
840
  /* from Linux 2.6.15 videodev2.h */
841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857
  {V4L2_PIX_FMT_RGB332, TRUE},
  {V4L2_PIX_FMT_RGB555, TRUE},
  {V4L2_PIX_FMT_RGB565, TRUE},
  {V4L2_PIX_FMT_RGB555X, TRUE},
  {V4L2_PIX_FMT_RGB565X, TRUE},
  {V4L2_PIX_FMT_BGR24, TRUE},
  {V4L2_PIX_FMT_RGB24, TRUE},
  {V4L2_PIX_FMT_BGR32, TRUE},
  {V4L2_PIX_FMT_RGB32, TRUE},
  {V4L2_PIX_FMT_GREY, TRUE},
  {V4L2_PIX_FMT_YVU410, TRUE},
  {V4L2_PIX_FMT_YVU420, TRUE},
  {V4L2_PIX_FMT_YUYV, TRUE},
  {V4L2_PIX_FMT_UYVY, TRUE},
  {V4L2_PIX_FMT_YUV422P, TRUE},
  {V4L2_PIX_FMT_YUV411P, TRUE},
  {V4L2_PIX_FMT_Y41P, TRUE},
Rob Clark's avatar
Rob Clark committed
858 859

  /* two planes -- one Y, one Cr + Cb interleaved  */
860 861
  {V4L2_PIX_FMT_NV12, TRUE},
  {V4L2_PIX_FMT_NV21, TRUE},
Rob Clark's avatar
Rob Clark committed
862 863

  /*  The following formats are not defined in the V4L2 specification */
864 865 866 867
  {V4L2_PIX_FMT_YUV410, TRUE},
  {V4L2_PIX_FMT_YUV420, TRUE},
  {V4L2_PIX_FMT_YYUV, TRUE},
  {V4L2_PIX_FMT_HI240, TRUE},
Rob Clark's avatar
Rob Clark committed
868 869 870

  /* see http://www.siliconimaging.com/RGB%20Bayer.htm */
#ifdef V4L2_PIX_FMT_SBGGR8
871
  {V4L2_PIX_FMT_SBGGR8, TRUE},
Rob Clark's avatar
Rob Clark committed
872 873 874
#endif

  /* compressed formats */
875 876
  {V4L2_PIX_FMT_MJPEG, TRUE},
  {V4L2_PIX_FMT_JPEG, TRUE},
877
#ifdef V4L2_PIX_FMT_PJPG
Thiago Santos's avatar
Thiago Santos committed
878
  {V4L2_PIX_FMT_PJPG, TRUE},
879
#endif
880 881
  {V4L2_PIX_FMT_DV, TRUE},
  {V4L2_PIX_FMT_MPEG, FALSE},
Rob Clark's avatar
Rob Clark committed
882

883
#ifdef V4L2_PIX_FMT_H264
884
  {V4L2_PIX_FMT_H264, TRUE},
885
#endif
886

Rob Clark's avatar
Rob Clark committed
887
  /*  Vendor-specific formats   */
888
  {V4L2_PIX_FMT_WNVA, TRUE},
Rob Clark's avatar
Rob Clark committed
889 890

#ifdef V4L2_PIX_FMT_SN9C10X
891
  {V4L2_PIX_FMT_SN9C10X, TRUE},
Rob Clark's avatar
Rob Clark committed
892 893
#endif
#ifdef V4L2_PIX_FMT_PWC1
894
  {V4L2_PIX_FMT_PWC1, TRUE},
Rob Clark's avatar
Rob Clark committed
895 896
#endif
#ifdef V4L2_PIX_FMT_PWC2
897
  {V4L2_PIX_FMT_PWC2, TRUE},
Rob Clark's avatar
Rob Clark committed
898 899
#endif
#ifdef V4L2_PIX_FMT_YVYU
900
  {V4L2_PIX_FMT_YVYU, TRUE},
Rob Clark's avatar
Rob Clark committed
901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922
#endif
};

#define GST_V4L2_FORMAT_COUNT (G_N_ELEMENTS (gst_v4l2_formats))


static struct v4l2_fmtdesc *
gst_v4l2_object_get_format_from_fourcc (GstV4l2Object * v4l2object,
    guint32 fourcc)
{
  struct v4l2_fmtdesc *fmt;
  GSList *walk;

  if (fourcc == 0)
    return NULL;

  walk = gst_v4l2_object_get_format_list (v4l2object);
  while (walk) {
    fmt = (struct v4l2_fmtdesc *) walk->data;
    if (fmt->pixelformat == fourcc)
      return fmt;
    /* special case for jpeg */
Thiago Santos's avatar
Thiago Santos committed
923
    if (fmt->pixelformat == V4L2_PIX_FMT_MJPEG ||
924 925 926 927 928 929 930 931 932 933
        fmt->pixelformat == V4L2_PIX_FMT_JPEG
#ifdef V4L2_PIX_FMT_PJPG
        || fmt->pixelformat == V4L2_PIX_FMT_PJPG
#endif
        ) {
      if (fourcc == V4L2_PIX_FMT_JPEG || fourcc == V4L2_PIX_FMT_MJPEG
#ifdef V4L2_PIX_FMT_PJPG
          || fourcc == V4L2_PIX_FMT_PJPG
#endif
          ) {
Thiago Santos's avatar
Thiago Santos committed
934 935
        return fmt;
      }
Rob Clark's avatar
Rob Clark committed
936 937 938 939 940 941 942 943 944 945
    }
    walk = g_slist_next (walk);
  }

  return NULL;
}



/* complete made up ranking, the values themselves are meaningless */
946 947
/* These ranks MUST be X such that X<<15 fits on a signed int - see
   the comment at the end of gst_v4l2_object_format_get_rank. */
Rob Clark's avatar
Rob Clark committed
948 949 950 951 952 953 954 955 956 957 958
#define YUV_BASE_RANK     1000
#define JPEG_BASE_RANK     500
#define DV_BASE_RANK       200
#define RGB_BASE_RANK      100
#define YUV_ODD_BASE_RANK   50
#define RGB_ODD_BASE_RANK   25
#define BAYER_BASE_RANK     15
#define S910_BASE_RANK      10
#define GREY_BASE_RANK       5
#define PWC_BASE_RANK        1

959 960 961 962 963 964 965
/* This flag is already used by libv4l2 although
 * it was added to the Linux kernel in 2.6.32
 */
#ifndef V4L2_FMT_FLAG_EMULATED
#define V4L2_FMT_FLAG_EMULATED 0x0002
#endif

Rob Clark's avatar
Rob Clark committed
966
static gint
967
gst_v4l2_object_format_get_rank (const struct v4l2_fmtdesc *fmt)
Rob Clark's avatar
Rob Clark committed
968
{
969
  guint32 fourcc = fmt->pixelformat;
970
  gboolean emulated = ((fmt->flags & V4L2_FMT_FLAG_EMULATED) != 0);
971 972
  gint rank = 0;

Rob Clark's avatar
Rob Clark committed
973 974
  switch (fourcc) {
    case V4L2_PIX_FMT_MJPEG:
975
#ifdef V4L2_PIX_FMT_PJPG
Thiago Santos's avatar
Thiago Santos committed
976
    case V4L2_PIX_FMT_PJPG:
977 978
      rank = JPEG_BASE_RANK;
      break;
979
#endif
Rob Clark's avatar
Rob Clark committed
980
    case V4L2_PIX_FMT_JPEG:
981 982
      rank = JPEG_BASE_RANK + 1;
      break;
983 984 985
    case V4L2_PIX_FMT_MPEG:    /* MPEG          */
      rank = JPEG_BASE_RANK + 2;
      break;
Rob Clark's avatar
Rob Clark committed
986 987 988 989 990 991

    case V4L2_PIX_FMT_RGB332:
    case V4L2_PIX_FMT_RGB555:
    case V4L2_PIX_FMT_RGB555X:
    case V4L2_PIX_FMT_RGB565:
    case V4L2_PIX_FMT_RGB565X:
992 993
      rank = RGB_ODD_BASE_RANK;
      break;
Rob Clark's avatar
Rob Clark committed
994 995 996

    case V4L2_PIX_FMT_RGB24:
    case V4L2_PIX_FMT_BGR24:
997 998
      rank = RGB_BASE_RANK - 1;
      break;
Rob Clark's avatar
Rob Clark committed
999 1000 1001

    case V4L2_PIX_FMT_RGB32:
    case V4L2_PIX_FMT_BGR32:
1002 1003
      rank = RGB_BASE_RANK;
      break;
Rob Clark's avatar
Rob Clark committed
1004 1005

    case V4L2_PIX_FMT_GREY:    /*  8  Greyscale     */
1006 1007
      rank = GREY_BASE_RANK;
      break;
Rob Clark's avatar
Rob Clark committed
1008 1009 1010 1011 1012

    case V4L2_PIX_FMT_NV12:    /* 12  Y/CbCr 4:2:0  */
    case V4L2_PIX_FMT_NV21:    /* 12  Y/CrCb 4:2:0  */
    case V4L2_PIX_FMT_YYUV:    /* 16  YUV 4:2:2     */
    case V4L2_PIX_FMT_HI240:   /*  8  8-bit color   */
1013 1014
      rank = YUV_ODD_BASE_RANK;
      break;
Rob Clark's avatar
Rob Clark committed
1015 1016

    case V4L2_PIX_FMT_YVU410:  /* YVU9,  9 bits per pixel */
1017 1018
      rank = YUV_BASE_RANK + 3;
      break;
Rob Clark's avatar
Rob Clark committed
1019
    case V4L2_PIX_FMT_YUV410:  /* YUV9,  9 bits per pixel */
1020 1021
      rank = YUV_BASE_RANK + 2;
      break;
Rob Clark's avatar
Rob Clark committed
1022
    case V4L2_PIX_FMT_YUV420:  /* I420, 12 bits per pixel */
1023 1024
      rank = YUV_BASE_RANK + 7;
      break;
Rob Clark's avatar
Rob Clark committed
1025
    case V4L2_PIX_FMT_YUYV:    /* YUY2, 16 bits per pixel */
1026 1027
      rank = YUV_BASE_RANK + 10;
      break;
Rob Clark's avatar
Rob Clark committed
1028
    case V4L2_PIX_FMT_YVU420:  /* YV12, 12 bits per pixel */
1029 1030
      rank = YUV_BASE_RANK + 6;
      break;
Rob Clark's avatar
Rob Clark committed
1031
    case V4L2_PIX_FMT_UYVY:    /* UYVY, 16 bits per pixel */
1032 1033
      rank = YUV_BASE_RANK + 9;
      break;
Rob Clark's avatar
Rob Clark committed
1034
    case V4L2_PIX_FMT_Y41P:    /* Y41P, 12 bits per pixel */
1035 1036
      rank = YUV_BASE_RANK + 5;
      break;
Rob Clark's avatar
Rob Clark committed
1037
    case V4L2_PIX_FMT_YUV411P: /* Y41B, 12 bits per pixel */
1038 1039
      rank = YUV_BASE_RANK + 4;
      break;
Rob Clark's avatar
Rob Clark committed
1040
    case V4L2_PIX_FMT_YUV422P: /* Y42B, 16 bits per pixel */
1041 1042
      rank = YUV_BASE_RANK + 8;
      break;
Rob Clark's avatar
Rob Clark committed
1043 1044

    case V4L2_PIX_FMT_DV:
1045 1046
      rank = DV_BASE_RANK;
      break;
Rob Clark's avatar
Rob Clark committed
1047 1048

    case V4L2_PIX_FMT_WNVA:    /* Winnov hw compres */
1049 1050
      rank = 0;
      break;
Rob Clark's avatar
Rob Clark committed
1051 1052 1053

#ifdef V4L2_PIX_FMT_SBGGR8
    case V4L2_PIX_FMT_SBGGR8:
1054 1055
      rank = BAYER_BASE_RANK;
      break;
Rob Clark's avatar
Rob Clark committed
1056 1057 1058 1059
#endif

#ifdef V4L2_PIX_FMT_SN9C10X
    case V4L2_PIX_FMT_SN9C10X:
1060 1061
      rank = S910_BASE_RANK;
      break;
Rob Clark's avatar
Rob Clark committed
1062 1063 1064 1065
#endif

#ifdef V4L2_PIX_FMT_PWC1
    case V4L2_PIX_FMT_PWC1:
1066 1067
      rank = PWC_BASE_RANK;
      break;
Rob Clark's avatar
Rob Clark committed
1068 1069 1070
#endif
#ifdef V4L2_PIX_FMT_PWC2
    case V4L2_PIX_FMT_PWC2:
1071 1072
      rank = PWC_BASE_RANK;
      break;
Rob Clark's avatar
Rob Clark committed
1073 1074 1075
#endif

    default:
1076
      rank = 0;
Rob Clark's avatar
Rob Clark committed
1077 1078 1079
      break;
  }

1080 1081 1082 1083 1084 1085 1086 1087
  /* All ranks are below 1<<15 so a shift by 15
   * will a) make all non-emulated formats larger
   * than emulated and b) will not overflow
   */
  if (!emulated)
    rank <<= 15;

  return rank;
Rob Clark's avatar
Rob Clark committed
1088 1089 1090 1091 1092 1093 1094
}



static gint
format_cmp_func (gconstpointer a, gconstpointer b)
{
1095 1096
  const struct v4l2_fmtdesc *fa = a;
  const struct v4l2_fmtdesc *fb = b;
Rob Clark's avatar
Rob Clark committed
1097

1098
  if (fa->pixelformat == fb->pixelformat)
Rob Clark's avatar
Rob Clark committed
1099 1100
    return 0;

1101 1102
  return gst_v4l2_object_format_get_rank (fb) -
      gst_v4l2_object_format_get_rank (fa);
Rob Clark's avatar
Rob Clark committed
1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148
}

/******************************************************
 * gst_v4l2_object_fill_format_list():
 *   create list of supported capture formats
 * return value: TRUE on success, FALSE on error
 ******************************************************/
static gboolean
gst_v4l2_object_fill_format_list (GstV4l2Object * v4l2object)
{
  gint n;
  struct v4l2_fmtdesc *format;

  GST_DEBUG_OBJECT (v4l2object->element, "getting src format enumerations");

  /* format enumeration */
  for (n = 0;; n++) {
    format = g_new0 (struct v4l2_fmtdesc, 1);

    format->index = n;
    format->type = v4l2object->type;

    if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_ENUM_FMT, format) < 0) {
      if (errno == EINVAL) {
        g_free (format);
        break;                  /* end of enumeration */
      } else {
        goto failed;
      }
    }

    GST_LOG_OBJECT (v4l2object->element, "index:       %u", format->index);
    GST_LOG_OBJECT (v4l2object->element, "type:        %d", format->type);
    GST_LOG_OBJECT (v4l2object->element, "flags:       %08x", format->flags);
    GST_LOG_OBJECT (v4l2object->element, "description: '%s'",
        format->description);
    GST_LOG_OBJECT (v4l2object->element, "pixelformat: %" GST_FOURCC_FORMAT,
        GST_FOURCC_ARGS (format->pixelformat));

    /* sort formats according to our preference;  we do this, because caps
     * are probed in the order the formats are in the list, and the order of
     * formats in the final probed caps matters for things like fixation */
    v4l2object->formats = g_slist_insert_sorted (v4l2object->formats, format,
        (GCompareFunc) format_cmp_func);
  }

1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162
#ifndef GST_DISABLE_GST_DEBUG
  {
    GSList *l;

    GST_INFO_OBJECT (v4l2object->element, "got %d format(s):", n);
    for (l = v4l2object->formats; l != NULL; l = l->next) {
      format = l->data;

      GST_INFO_OBJECT (v4l2object->element,
          "  %" GST_FOURCC_FORMAT "%s", GST_FOURCC_ARGS (format->pixelformat),
          ((format->flags & V4L2_FMT_FLAG_EMULATED)) ? " (emulated)" : "");
    }
  }
#endif
Rob Clark's avatar
Rob Clark committed
1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175

  return TRUE;

  /* ERRORS */
failed:
  {
    GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS,
        (_("Failed to enumerate possible video formats device '%s' can work with"), v4l2object->videodev), ("Failed to get number %d in pixelformat enumeration for %s. (%d - %s)", n, v4l2object->videodev, errno, g_strerror (errno)));
    g_free (format);
    return FALSE;
  }
}

Stefan Kost's avatar
Stefan Kost committed
1176
/*
Rob Clark's avatar
Rob Clark committed
1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195
 * Get the list of supported capture formats, a list of
 * <code>struct v4l2_fmtdesc</code>.
 */
GSList *
gst_v4l2_object_get_format_list (GstV4l2Object * v4l2object)
{
  if (!v4l2object->formats)
    gst_v4l2_object_fill_format_list (v4l2object);
  return v4l2object->formats;
}


GstStructure *
gst_v4l2_object_v4l2fourcc_to_structure (guint32 fourcc)
{
  GstStructure *structure = NULL;

  switch (fourcc) {
    case V4L2_PIX_FMT_MJPEG:   /* Motion-JPEG */
1196
#ifdef V4L2_PIX_FMT_PJPG
Thiago Santos's avatar
Thiago Santos committed
1197
    case V4L2_PIX_FMT_PJPG:    /* Progressive-JPEG */
1198
#endif