gstv4l2object.c 97.1 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
 *
 * 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
Tim-Philipp Müller's avatar
Tim-Philipp Müller committed
17
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301,
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 59 60 61 62 63 64
#ifndef V4L2_PIX_FMT_NV12M
#define V4L2_PIX_FMT_NV12M GST_MAKE_FOURCC ('N', 'M', '1', '2')
#endif
#ifndef V4L2_PIX_FMT_NV21M
#define V4L2_PIX_FMT_NV21M GST_MAKE_FOURCC ('N', 'M', '2', '1')
#endif

Rob Clark's avatar
Rob Clark committed
65
GST_DEBUG_CATEGORY_EXTERN (v4l2_debug);
66
GST_DEBUG_CATEGORY_EXTERN (GST_CAT_PERFORMANCE);
Rob Clark's avatar
Rob Clark committed
67 68
#define GST_CAT_DEFAULT v4l2_debug

69
#define DEFAULT_PROP_DEVICE_NAME        NULL
70
#define DEFAULT_PROP_DEVICE_FD          -1
71
#define DEFAULT_PROP_FLAGS              0
Rob Clark's avatar
Rob Clark committed
72
#define DEFAULT_PROP_TV_NORM            0
73
#define DEFAULT_PROP_CHANNEL            NULL
74
#define DEFAULT_PROP_FREQUENCY          0
Wim Taymans's avatar
Wim Taymans committed
75
#define DEFAULT_PROP_IO_MODE            GST_V4L2_IO_AUTO
76

77 78
#define ENCODED_BUFFER_SIZE             (1 * 1024 * 1024)

Stefan Kost's avatar
Stefan Kost committed
79 80 81 82 83 84
enum
{
  PROP_0,
  V4L2_STD_OBJECT_PROPS,
};

85 86
static GSList *gst_v4l2_object_get_format_list (GstV4l2Object * v4l2object);

87
#if 0
Wim Taymans's avatar
Wim Taymans committed
88 89
G_LOCK_DEFINE_STATIC (probe_lock);

Stefan Kost's avatar
Stefan Kost committed
90
const GList *
91 92 93 94 95
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
96
  G_LOCK (probe_lock);
97 98 99 100 101

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

Wim Taymans's avatar
Wim Taymans committed
102
  G_UNLOCK (probe_lock);
103 104 105 106

  return list;
}

107 108 109 110
static gboolean init = FALSE;
static GList *devices = NULL;

#ifdef HAVE_GUDEV
111
static gboolean
112
gst_v4l2_class_probe_devices_with_udev (GstElementClass * klass, gboolean check,
113 114
    GList ** klass_devices)
{
115
  GUdevClient *client = NULL;
116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162
  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;
163

164 165 166 167 168 169 170 171
  return init;
}
#endif /* HAVE_GUDEV */

static gboolean
gst_v4l2_class_probe_devices (GstElementClass * klass, gboolean check,
    GList ** klass_devices)
{
172
  if (!check) {
Stefan Kost's avatar
Stefan Kost committed
173
    const gchar *dev_base[] = { "/dev/video", "/dev/v4l2/video", NULL };
174 175 176
    gint base, n, fd;

    while (devices) {
177
      gchar *device = devices->data;
178
      devices = g_list_remove (devices, device);
179 180 181 182
      g_free (device);
    }

    /*
Rob Clark's avatar
Rob Clark committed
183
     * detect /dev entries
184 185 186 187 188 189 190 191 192
     */
    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
193
         * does the /dev/ entry exist at all?
194 195 196
         */
        if (stat (device, &s) == 0) {
          /*
Rob Clark's avatar
Rob Clark committed
197
           * yes: is a device attached?
198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228
           */
          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:
229 230 231 232
#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 */
233
      gst_v4l2_class_probe_devices (klass, FALSE, klass_devices);
234
#endif /* HAVE_GUDEV */
235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250
      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:
251 252 253 254
#ifdef HAVE_GUDEV
      ret =
          !gst_v4l2_class_probe_devices_with_udev (klass, FALSE, klass_devices);
#else /* !HAVE_GUDEV */
255
      ret = !gst_v4l2_class_probe_devices (klass, TRUE, klass_devices);
256
#endif /* HAVE_GUDEV */
257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308
      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;
}
309
#endif
310 311

#define GST_TYPE_V4L2_DEVICE_FLAGS (gst_v4l2_device_get_type ())
312
static GType
313 314 315 316 317 318
gst_v4l2_device_get_type (void)
{
  static GType v4l2_device_type = 0;

  if (v4l2_device_type == 0) {
    static const GFlagsValue values[] = {
319 320 321 322 323 324 325 326 327
      {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"},
328 329 330 331 332 333 334 335 336 337 338

      {0, NULL, NULL}
    };

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

  return v4l2_device_type;
}

Rob Clark's avatar
Rob Clark committed
339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390
#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;
}

391
GType
Wim Taymans's avatar
Wim Taymans committed
392 393 394 395 396 397 398 399 400 401
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"},
402
      {GST_V4L2_IO_DMABUF, "GST_V4L2_IO_DMABUF", "dmabuf"},
Wim Taymans's avatar
Wim Taymans committed
403 404 405 406 407 408 409 410

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

411
void
Rob Clark's avatar
Rob Clark committed
412 413
gst_v4l2_object_install_properties_helper (GObjectClass * gobject_class,
    const char *default_device)
414
{
415 416
  g_object_class_install_property (gobject_class, PROP_DEVICE,
      g_param_spec_string ("device", "Device", "Device location",
417
          default_device, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
418 419
  g_object_class_install_property (gobject_class, PROP_DEVICE_NAME,
      g_param_spec_string ("device-name", "Device name",
420 421
          "Name of the device", DEFAULT_PROP_DEVICE_NAME,
          G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
422 423 424
  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,
425
          G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
426 427
  g_object_class_install_property (gobject_class, PROP_FLAGS,
      g_param_spec_flags ("flags", "Flags", "Device type flags",
428 429
          GST_TYPE_V4L2_DEVICE_FLAGS, DEFAULT_PROP_FLAGS,
          G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
430

431
  /**
432
   * GstV4l2Src:brightness:
433 434 435
   *
   * Picture brightness, or more precisely, the black level
   */
436 437 438 439 440
  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));
441
  /**
442
   * GstV4l2Src:contrast:
443 444 445
   *
   * Picture contrast or luma gain
   */
446 447 448 449 450
  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));
451
  /**
452
   * GstV4l2Src:saturation:
453 454 455
   *
   * Picture color saturation or chroma gain
   */
456 457 458 459 460
  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));
461
  /**
462
   * GstV4l2Src:hue:
463 464 465
   *
   * Hue or color balance
   */
466 467 468 469 470
  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
471 472

  /**
473
   * GstV4l2Src:norm:
Rob Clark's avatar
Rob Clark committed
474 475 476 477 478 479 480 481
   *
   * TV norm
   */
  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
482 483

  /**
484
   * GstV4l2Src:io-mode:
Wim Taymans's avatar
Wim Taymans committed
485 486 487 488 489 490 491 492
   *
   * 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));
493 494

  /**
495
   * GstV4l2Src:extra-controls:
496 497 498 499 500 501 502 503 504 505 506
   *
   * Additional v4l2 controls for the device. The controls are identified
   * by the control name (lowercase with '_' for any non-alphanumeric
   * characters).
   *
   * Since: 1.2
   */
  g_object_class_install_property (gobject_class, PROP_EXTRA_CONTROLS,
      g_param_spec_boxed ("extra-controls", "Extra Controls",
          "Extra v4l2 controls (CIDs) for the device",
          GST_TYPE_STRUCTURE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
507 508

  /**
509
   * GstV4l2Src:pixel-aspect-ratio:
510 511 512 513 514 515 516 517 518 519 520 521
   *
   * The pixel aspect ratio of the device. This overwrites the pixel aspect
   * ratio queried from the device.
   *
   * Since: 1.2
   */
  g_object_class_install_property (gobject_class, PROP_PIXEL_ASPECT_RATIO,
      g_param_spec_string ("pixel-aspect-ratio", "Pixel Aspect Ratio",
          "Overwrite the pixel aspect ratio of the device", "1/1",
          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

  /**
522
   * GstV4l2Src:force-aspect-ratio:
523 524 525 526 527 528 529 530 531 532 533
   *
   * When enabled, the pixel aspect ratio queried from the device or set
   * with the pixel-aspect-ratio property will be enforced.
   *
   * Since: 1.2
   */
  g_object_class_install_property (gobject_class, PROP_FORCE_ASPECT_RATIO,
      g_param_spec_boolean ("force-aspect-ratio", "Force aspect ratio",
          "When enabled, the pixel aspect ratio will be enforced", TRUE,
          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

534 535 536
}

GstV4l2Object *
537
gst_v4l2_object_new (GstElement * element,
Rob Clark's avatar
Rob Clark committed
538
    enum v4l2_buf_type type,
539
    const char *default_device,
540
    GstV4l2GetInOutFunction get_in_out_func,
541 542
    GstV4l2SetInOutFunction set_in_out_func,
    GstV4l2UpdateFpsFunction update_fps_func)
543 544 545 546
{
  GstV4l2Object *v4l2object;

  /*
Rob Clark's avatar
Rob Clark committed
547
   * some default values
548 549 550
   */
  v4l2object = g_new0 (GstV4l2Object, 1);

Rob Clark's avatar
Rob Clark committed
551 552 553
  v4l2object->type = type;
  v4l2object->formats = NULL;

554 555 556
  v4l2object->element = element;
  v4l2object->get_in_out_func = get_in_out_func;
  v4l2object->set_in_out_func = set_in_out_func;
557
  v4l2object->update_fps_func = update_fps_func;
558 559

  v4l2object->video_fd = -1;
560
  v4l2object->poll = gst_poll_new (TRUE);
561
  v4l2object->active = FALSE;
Rob Clark's avatar
Rob Clark committed
562
  v4l2object->videodev = g_strdup (default_device);
563

564 565
  v4l2object->norms = NULL;
  v4l2object->channels = NULL;
566 567 568 569
  v4l2object->colors = NULL;

  v4l2object->xwindow_id = 0;

570 571
  v4l2object->keep_aspect = TRUE;

572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593
  v4l2object->n_v4l2_planes = 0;

  /*
   * this boolean only applies in v4l2-MPLANE mode.
   * TRUE: means it prefers to use several v4l2 (non contiguous)
   * planes. For example if the device supports NV12 and NV12M
   * both in MPLANE mode, then it will prefer NV12M
   * FALSE: means it prefers to use one v4l2 plane (which contains
   * all gst planes as if it was working in non-v4l2-MPLANE mode.
   * For example if the device supports NV12 and NV12M
   * both in MPLANE mode, then it will prefer NV12
   *
   * this boolean is also used to manage the case where the
   * device only supports the mode MPLANE and at the same time it
   * does not support both NV12 and NV12M. So in this case we first
   * try to use the prefered config, and at least try the other case
   * if it fails. For example in MPLANE mode if it has NV12 and not
   * NV21M then even if you set prefered_non_contiguous to TRUE it will
   * try NV21 as well.
   */
  v4l2object->prefered_non_contiguous = TRUE;

594 595
  v4l2object->no_initial_format = FALSE;

596 597 598
  return v4l2object;
}

Rob Clark's avatar
Rob Clark committed
599 600 601
static gboolean gst_v4l2_object_clear_format_list (GstV4l2Object * v4l2object);


602
void
603
gst_v4l2_object_destroy (GstV4l2Object * v4l2object)
604
{
605
  g_return_if_fail (v4l2object != NULL);
606

607 608 609
  if (v4l2object->videodev)
    g_free (v4l2object->videodev);

610 611 612
  if (v4l2object->poll)
    gst_poll_free (v4l2object->poll);

613 614 615
  if (v4l2object->channel)
    g_free (v4l2object->channel);

Rob Clark's avatar
Rob Clark committed
616 617 618 619
  if (v4l2object->formats) {
    gst_v4l2_object_clear_format_list (v4l2object);
  }

620 621 622 623
  if (v4l2object->probed_caps) {
    gst_caps_unref (v4l2object->probed_caps);
  }

624
  g_free (v4l2object);
625 626
}

Rob Clark's avatar
Rob Clark committed
627 628 629 630 631 632 633 634 635 636 637

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;
}

638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661
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
662

663
gboolean
664
gst_v4l2_object_set_property_helper (GstV4l2Object * v4l2object,
665 666 667 668
    guint prop_id, const GValue * value, GParamSpec * pspec)
{
  switch (prop_id) {
    case PROP_DEVICE:
Wim Taymans's avatar
Wim Taymans committed
669
      g_free (v4l2object->videodev);
670
      v4l2object->videodev = g_value_dup_string (value);
671
      break;
672 673 674 675 676 677 678 679 680 681 682 683 684 685 686
    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
687 688
    case PROP_TV_NORM:
      v4l2object->tv_norm = g_value_get_enum (value);
689
      break;
Rob Clark's avatar
Rob Clark committed
690
#if 0
691
    case PROP_CHANNEL:
692 693 694
      if (GST_V4L2_IS_OPEN (v4l2object)) {
        GstTuner *tuner = GST_TUNER (v4l2object->element);
        GstTunerChannel *channel = gst_tuner_find_channel_by_name (tuner,
695
            (gchar *) g_value_get_string (value));
696 697 698 699 700 701 702

        if (channel) {
          /* like gst_tuner_set_channel (tuner, channel)
             without g_object_notify */
          gst_v4l2_tuner_set_channel (v4l2object, channel);
        }
      } else {
703 704
        g_free (v4l2object->channel);
        v4l2object->channel = g_value_dup_string (value);
705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723
      }
      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;
724
#endif
Wim Taymans's avatar
Wim Taymans committed
725 726 727
    case PROP_IO_MODE:
      v4l2object->req_mode = g_value_get_enum (value);
      break;
728 729 730 731 732 733 734 735 736 737 738
    case PROP_EXTRA_CONTROLS:{
      const GstStructure *s = gst_value_get_structure (value);

      if (v4l2object->extra_controls)
        gst_structure_free (v4l2object->extra_controls);

      v4l2object->extra_controls = s ? gst_structure_copy (s) : NULL;
      if (GST_V4L2_IS_OPEN (v4l2object))
        gst_v4l2_set_controls (v4l2object, v4l2object->extra_controls);
      break;
    }
739 740 741 742 743 744 745 746 747 748 749 750 751 752 753
    case PROP_PIXEL_ASPECT_RATIO:
      g_free (v4l2object->par);
      v4l2object->par = g_new0 (GValue, 1);
      g_value_init (v4l2object->par, GST_TYPE_FRACTION);
      if (!g_value_transform (value, v4l2object->par)) {
        g_warning ("Could not transform string to aspect ratio");
        gst_value_set_fraction (v4l2object->par, 1, 1);
      }
      GST_DEBUG_OBJECT (v4l2object->element, "set PAR to %d/%d",
          gst_value_get_fraction_numerator (v4l2object->par),
          gst_value_get_fraction_denominator (v4l2object->par));
      break;
    case PROP_FORCE_ASPECT_RATIO:
      v4l2object->keep_aspect = g_value_get_boolean (value);
      break;
754 755 756 757 758 759 760 761 762
    default:
      return FALSE;
      break;
  }
  return TRUE;
}


gboolean
763
gst_v4l2_object_get_property_helper (GstV4l2Object * v4l2object,
764 765 766 767 768 769 770 771
    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:
    {
772
      const guchar *new = NULL;
773

774
      if (GST_V4L2_IS_OPEN (v4l2object)) {
775
        new = v4l2object->vcap.card;
776
      } else if (gst_v4l2_open (v4l2object)) {
777
        new = v4l2object->vcap.card;
778 779
        gst_v4l2_close (v4l2object);
      }
780
      g_value_set_string (value, (gchar *) new);
781 782
      break;
    }
783 784 785 786 787 788 789 790
    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;
    }
791 792 793 794 795 796 797 798
    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
799 800 801
            V4L2_CAP_VIDEO_OVERLAY |
            V4L2_CAP_VBI_CAPTURE |
            V4L2_CAP_VBI_OUTPUT | V4L2_CAP_TUNER | V4L2_CAP_AUDIO);
802 803 804 805 806 807

        if (v4l2object->vcap.capabilities & V4L2_CAP_VIDEO_CAPTURE_MPLANE)
          flags |= V4L2_CAP_VIDEO_CAPTURE;

        if (v4l2object->vcap.capabilities & V4L2_CAP_VIDEO_OUTPUT_MPLANE)
          flags |= V4L2_CAP_VIDEO_OUTPUT;
808 809 810 811
      }
      g_value_set_flags (value, flags);
      break;
    }
812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829
    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
830 831 832
    case PROP_TV_NORM:
      g_value_set_enum (value, v4l2object->tv_norm);
      break;
Wim Taymans's avatar
Wim Taymans committed
833 834 835
    case PROP_IO_MODE:
      g_value_set_enum (value, v4l2object->req_mode);
      break;
836 837 838
    case PROP_EXTRA_CONTROLS:
      gst_value_set_structure (value, v4l2object->extra_controls);
      break;
839 840 841 842 843 844 845
    case PROP_PIXEL_ASPECT_RATIO:
      if (v4l2object->par)
        g_value_transform (v4l2object->par, value);
      break;
    case PROP_FORCE_ASPECT_RATIO:
      g_value_set_boolean (value, v4l2object->keep_aspect);
      break;
846 847 848 849 850 851 852 853 854 855 856 857
    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
858 859 860 861 862 863
  GstTuner *tuner;

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

  tuner = GST_TUNER (v4l2object->element);
864

Rob Clark's avatar
Rob Clark committed
865 866
  if (v4l2object->tv_norm)
    norm = gst_v4l2_tuner_get_norm_by_std_id (v4l2object, v4l2object->tv_norm);
867 868
  GST_DEBUG_OBJECT (v4l2object->element, "tv_norm=0x%" G_GINT64_MODIFIER "x, "
      "norm=%p", (guint64) v4l2object->tv_norm, norm);
869 870 871 872 873 874
  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
875 876
      v4l2object->tv_norm =
          gst_v4l2_tuner_get_std_id_by_norm (v4l2object, norm);
877 878 879 880
      gst_tuner_norm_changed (tuner, norm);
    }
  }

881 882
  if (v4l2object->channel)
    channel = gst_tuner_find_channel_by_name (tuner, v4l2object->channel);
883 884 885 886
  if (channel) {
    gst_tuner_set_channel (tuner, channel);
  } else {
    channel =
887 888
        GST_TUNER_CHANNEL (gst_tuner_get_channel (GST_TUNER
            (v4l2object->element)));
889 890 891 892 893
    if (channel) {
      g_free (v4l2object->channel);
      v4l2object->channel = g_strdup (channel->label);
      gst_tuner_channel_changed (tuner, channel);
    }
894 895
  }

896 897
  if (channel
      && GST_TUNER_CHANNEL_HAS_FLAG (channel, GST_TUNER_CHANNEL_FREQUENCY)) {
898 899 900 901 902 903 904 905 906 907 908 909 910 911
    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
912
gst_v4l2_object_open (GstV4l2Object * v4l2object)
913 914 915 916 917 918
{
  if (gst_v4l2_open (v4l2object))
    gst_v4l2_set_defaults (v4l2object);
  else
    return FALSE;

Rob Clark's avatar
Rob Clark committed
919
#ifdef HAVE_XVIDEO
920
  gst_v4l2_video_overlay_start (v4l2object);
921 922 923 924 925
#endif

  return TRUE;
}

926 927 928 929 930 931 932 933 934 935 936 937 938 939
gboolean
gst_v4l2_object_open_shared (GstV4l2Object * v4l2object, GstV4l2Object * other)
{
  gboolean ret;

  ret = gst_v4l2_dup (v4l2object, other);

#ifdef HAVE_XVIDEO
  gst_v4l2_video_overlay_start (v4l2object);
#endif

  return ret;
}

940
gboolean
941
gst_v4l2_object_close (GstV4l2Object * v4l2object)
942
{
Rob Clark's avatar
Rob Clark committed
943
#ifdef HAVE_XVIDEO
944
  gst_v4l2_video_overlay_stop (v4l2object);
945 946 947 948 949
#endif

  if (!gst_v4l2_close (v4l2object))
    return FALSE;

950 951
  gst_caps_replace (&v4l2object->probed_caps, NULL);

952 953 954 955
  if (v4l2object->formats) {
    gst_v4l2_object_clear_format_list (v4l2object);
  }

956 957
  return TRUE;
}
Rob Clark's avatar
Rob Clark committed
958 959 960 961 962


/*
 * common format / caps utilities:
 */
963 964 965 966 967 968 969 970
typedef enum
{
  GST_V4L2_RAW = 1 << 0,
  GST_V4L2_CODEC = 1 << 1,
  GST_V4L2_TRANSPORT = 1 << 2,
  GST_V4L2_ALL = 0xffff
} GstV4L2FormatFlags;

971 972 973 974
typedef struct
{
  guint32 format;
  gboolean dimensions;
975
  GstV4L2FormatFlags flags;
976
} GstV4L2FormatDesc;
Rob Clark's avatar
Rob Clark committed
977

978
static const GstV4L2FormatDesc gst_v4l2_formats[] = {
Rob Clark's avatar
Rob Clark committed
979
  /* from Linux 2.6.15 videodev2.h */
980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996
  {V4L2_PIX_FMT_RGB332, TRUE, GST_V4L2_RAW},
  {V4L2_PIX_FMT_RGB555, TRUE, GST_V4L2_RAW},
  {V4L2_PIX_FMT_RGB565, TRUE, GST_V4L2_RAW},
  {V4L2_PIX_FMT_RGB555X, TRUE, GST_V4L2_RAW},
  {V4L2_PIX_FMT_RGB565X, TRUE, GST_V4L2_RAW},
  {V4L2_PIX_FMT_BGR24, TRUE, GST_V4L2_RAW},
  {V4L2_PIX_FMT_RGB24, TRUE, GST_V4L2_RAW},
  {V4L2_PIX_FMT_BGR32, TRUE, GST_V4L2_RAW},
  {V4L2_PIX_FMT_RGB32, TRUE, GST_V4L2_RAW},
  {V4L2_PIX_FMT_GREY, TRUE, GST_V4L2_RAW},
  {V4L2_PIX_FMT_YVU410, TRUE, GST_V4L2_RAW},
  {V4L2_PIX_FMT_YVU420, TRUE, GST_V4L2_RAW},
  {V4L2_PIX_FMT_YUYV, TRUE, GST_V4L2_RAW},
  {V4L2_PIX_FMT_UYVY, TRUE, GST_V4L2_RAW},
  {V4L2_PIX_FMT_YUV422P, TRUE, GST_V4L2_RAW},
  {V4L2_PIX_FMT_YUV411P, TRUE, GST_V4L2_RAW},
  {V4L2_PIX_FMT_Y41P, TRUE, GST_V4L2_RAW},
Rob Clark's avatar
Rob Clark committed
997 998

  /* two planes -- one Y, one Cr + Cb interleaved  */
999 1000 1001 1002
  {V4L2_PIX_FMT_NV12, TRUE, GST_V4L2_RAW},
  {V4L2_PIX_FMT_NV12M, TRUE, GST_V4L2_RAW},
  {V4L2_PIX_FMT_NV21, TRUE, GST_V4L2_RAW},
  {V4L2_PIX_FMT_NV21M, TRUE, GST_V4L2_RAW},
Rob Clark's avatar
Rob Clark committed
1003 1004

  /*  The following formats are not defined in the V4L2 specification */
1005 1006 1007 1008
  {V4L2_PIX_FMT_YUV410, TRUE, GST_V4L2_RAW},
  {V4L2_PIX_FMT_YUV420, TRUE, GST_V4L2_RAW},
  {V4L2_PIX_FMT_YYUV, TRUE, GST_V4L2_RAW},
  {V4L2_PIX_FMT_HI240, TRUE, GST_V4L2_RAW},
Rob Clark's avatar
Rob Clark committed
1009 1010 1011

  /* see http://www.siliconimaging.com/RGB%20Bayer.htm */
#ifdef V4L2_PIX_FMT_SBGGR8
1012
  {V4L2_PIX_FMT_SBGGR8, TRUE, GST_V4L2_CODEC},
Rob Clark's avatar
Rob Clark committed
1013 1014 1015
#endif

  /* compressed formats */
1016 1017
  {V4L2_PIX_FMT_MJPEG, TRUE, GST_V4L2_CODEC},
  {V4L2_PIX_FMT_JPEG, TRUE, GST_V4L2_CODEC},
1018
#ifdef V4L2_PIX_FMT_PJPG
1019
  {V4L2_PIX_FMT_PJPG, TRUE, GST_V4L2_CODEC},
1020
#endif
1021 1022
  {V4L2_PIX_FMT_DV, TRUE, GST_V4L2_TRANSPORT},
  {V4L2_PIX_FMT_MPEG, FALSE, GST_V4L2_TRANSPORT},
1023
#ifdef V4L2_PIX_FMT_MPEG4
1024
  {V4L2_PIX_FMT_MPEG4, TRUE, GST_V4L2_CODEC},
1025
#endif
Rob Clark's avatar
Rob Clark committed
1026

1027
#ifdef V4L2_PIX_FMT_H263
1028
  {V4L2_PIX_FMT_H263, TRUE, GST_V4L2_CODEC},
1029
#endif
1030
#ifdef V4L2_PIX_FMT_H264
1031
  {V4L2_PIX_FMT_H264, TRUE, GST_V4L2_CODEC},
1032
#endif
1033

Rob Clark's avatar
Rob Clark committed
1034
  /*  Vendor-specific formats   */
1035
  {V4L2_PIX_FMT_WNVA, TRUE, GST_V4L2_CODEC},
Rob Clark's avatar
Rob Clark committed
1036 1037

#ifdef V4L2_PIX_FMT_SN9C10X
1038
  {V4L2_PIX_FMT_SN9C10X, TRUE, GST_V4L2_CODEC},
Rob Clark's avatar
Rob Clark committed
1039 1040
#endif
#ifdef V4L2_PIX_FMT_PWC1
1041
  {V4L2_PIX_FMT_PWC1, TRUE, GST_V4L2_CODEC},
Rob Clark's avatar
Rob Clark committed
1042 1043
#endif
#ifdef V4L2_PIX_FMT_PWC2
1044
  {V4L2_PIX_FMT_PWC2, TRUE, GST_V4L2_CODEC},
Rob Clark's avatar
Rob Clark committed
1045 1046
#endif
#ifdef V4L2_PIX_FMT_YVYU
1047
  {V4L2_PIX_FMT_YVYU, TRUE, GST_V4L2_RAW},
Rob Clark's avatar
Rob Clark committed
1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069
#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
1070
    if (fmt->pixelformat == V4L2_PIX_FMT_MJPEG ||
1071 1072 1073 1074 1075 1076 1077 1078 1079 1080
        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
1081 1082
        return fmt;
      }
Rob Clark's avatar
Rob Clark committed
1083 1084 1085 1086 1087 1088 1089 1090 1091 1092
    }
    walk = g_slist_next (walk);
  }

  return NULL;
}



/* complete made up ranking, the values themselves are meaningless */
1093 1094
/* 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
1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105
#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

1106 1107 1108 1109 1110 1111 1112
/* 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
1113
static gint
1114
gst_v4l2_object_format_get_rank (const struct v4l2_fmtdesc *fmt)
Rob Clark's avatar
Rob Clark committed
1115
{
1116
  guint32 fourcc = fmt->pixelformat;
1117
  gboolean emulated = ((fmt->flags & V4L2_FMT_FLAG_EMULATED) != 0);
1118 1119
  gint rank = 0;

Rob Clark's avatar
Rob Clark committed
1120 1121
  switch (fourcc) {
    case V4L2_PIX_FMT_MJPEG:
1122
#ifdef V4L2_PIX_FMT_PJPG
Thiago Santos's avatar
Thiago Santos committed
1123
    case V4L2_PIX_FMT_PJPG:
1124 1125
      rank = JPEG_BASE_RANK;
      break;
1126
#endif
Rob Clark's avatar
Rob Clark committed
1127
    case V4L2_PIX_FMT_JPEG:
1128 1129
      rank = JPEG_BASE_RANK + 1;
      break;
1130 1131 1132
    case V4L2_PIX_FMT_MPEG:    /* MPEG          */
      rank = JPEG_BASE_RANK + 2;
      break;
Rob Clark's avatar
Rob Clark committed
1133 1134 1135 1136 1137 1138

    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:
1139 1140
      rank = RGB_ODD_BASE_RANK;
      break;
Rob Clark's avatar
Rob Clark committed
1141 1142 1143

    case V4L2_PIX_FMT_RGB24:
    case V4L2_PIX_FMT_BGR24:
1144 1145
      rank = RGB_BASE_RANK - 1;
      break;
Rob Clark's avatar
Rob Clark committed
1146 1147 1148

    case V4L2_PIX_FMT_RGB32:
    case V4L2_PIX_FMT_BGR32:
1149 1150
      rank = RGB_BASE_RANK;
      break;
Rob Clark's avatar
Rob Clark committed
1151 1152

    case V4L2_PIX_FMT_GREY:    /*  8  Greyscale     */
1153 1154
      rank = GREY_BASE_RANK;
      break;
Rob Clark's avatar
Rob Clark committed
1155 1156

    case V4L2_PIX_FMT_NV12:    /* 12  Y/CbCr 4:2:0  */
1157
    case V4L2_PIX_FMT_NV12M:   /* Same as NV12      */
Rob Clark's avatar
Rob Clark committed
1158
    case V4L2_PIX_FMT_NV21:    /* 12  Y/CrCb 4:2:0  */
1159
    case V4L2_PIX_FMT_NV21M:   /* Same as NV21      */
Rob Clark's avatar
Rob Clark committed
1160 1161
    case V4L2_PIX_FMT_YYUV:    /* 16  YUV 4:2:2     */
    case V4L2_PIX_FMT_HI240:   /*  8  8-bit color   */
1162 1163
      rank = YUV_ODD_BASE_RANK;
      break;
Rob Clark's avatar
Rob Clark committed
1164 1165

    case V4L2_PIX_FMT_YVU410:  /* YVU9,  9 bits per pixel */
1166 1167
      rank = YUV_BASE_RANK + 3;
      break;
Rob Clark's avatar
Rob Clark committed
1168
    case V4L2_PIX_FMT_YUV410:  /* YUV9,  9 bits per pixel */