3 * Copyright (C) 2002 Ronald Bultje <rbultje@ronald.bitfreak.net>
4 * 2006 Edgard Lima <edgard.lima@indt.org.br>
6 * v4l2_calls.c - generic V4L2 calls handling
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
18 * You should have received a copy of the GNU Library General Public
19 * License along with this library; if not, write to the
20 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
21 * Boston, MA 02110-1301, USA.
28 #include <sys/types.h>
31 #include <sys/ioctl.h>
37 /* Needed on older Solaris Nevada builds (72 at least) */
39 #include <sys/ioccom.h>
41 #include "v4l2_calls.h"
42 #include "gstv4l2tuner.h"
44 #include "gstv4l2xoverlay.h"
46 #include "gstv4l2colorbalance.h"
48 #include "gstv4l2src.h"
49 #include "gstv4l2sink.h"
51 #include "gst/gst-i18n-plugin.h"
53 /* Those are ioctl calls */
54 #ifndef V4L2_CID_HCENTER
55 #define V4L2_CID_HCENTER V4L2_CID_HCENTER_DEPRECATED
57 #ifndef V4L2_CID_VCENTER
58 #define V4L2_CID_VCENTER V4L2_CID_VCENTER_DEPRECATED
61 GST_DEBUG_CATEGORY_EXTERN (v4l2_debug);
62 #define GST_CAT_DEFAULT v4l2_debug
64 /******************************************************
65 * gst_v4l2_get_capabilities():
66 * get the device's capturing capabilities
67 * return value: TRUE on success, FALSE on error
68 ******************************************************/
70 gst_v4l2_get_capabilities (GstV4l2Object * v4l2object)
74 e = v4l2object->element;
76 GST_DEBUG_OBJECT (e, "getting capabilities");
78 if (!GST_V4L2_IS_OPEN (v4l2object))
81 if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_QUERYCAP, &v4l2object->vcap) < 0)
84 GST_LOG_OBJECT (e, "driver: '%s'", v4l2object->vcap.driver);
85 GST_LOG_OBJECT (e, "card: '%s'", v4l2object->vcap.card);
86 GST_LOG_OBJECT (e, "bus_info: '%s'", v4l2object->vcap.bus_info);
87 GST_LOG_OBJECT (e, "version: %08x", v4l2object->vcap.version);
88 GST_LOG_OBJECT (e, "capabilites: %08x", v4l2object->vcap.capabilities);
95 GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS,
96 (_("Error getting capabilities for device '%s': "
97 "It isn't a v4l2 driver. Check if it is a v4l1 driver."),
98 v4l2object->videodev), GST_ERROR_SYSTEM);
104 /******************************************************
105 * gst_v4l2_empty_lists() and gst_v4l2_fill_lists():
106 * fill/empty the lists of enumerations
107 * return value: TRUE on success, FALSE on error
108 ******************************************************/
110 gst_v4l2_fill_lists (GstV4l2Object * v4l2object)
113 struct v4l2_queryctrl control = { 0, };
117 e = v4l2object->element;
119 GST_DEBUG_OBJECT (e, "getting enumerations");
120 GST_V4L2_CHECK_OPEN (v4l2object);
122 GST_DEBUG_OBJECT (e, " channels");
123 /* and now, the channels */
125 struct v4l2_input input;
126 GstV4l2TunerChannel *v4l2channel;
127 GstTunerChannel *channel;
129 memset (&input, 0, sizeof (input));
132 if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_ENUMINPUT, &input) < 0) {
133 if (errno == EINVAL || errno == ENOTTY)
134 break; /* end of enumeration */
136 GST_ELEMENT_ERROR (e, RESOURCE, SETTINGS,
137 (_("Failed to query attributes of input %d in device %s"),
138 n, v4l2object->videodev),
139 ("Failed to get %d in input enumeration for %s. (%d - %s)",
140 n, v4l2object->videodev, errno, strerror (errno)));
145 GST_LOG_OBJECT (e, " index: %d", input.index);
146 GST_LOG_OBJECT (e, " name: '%s'", input.name);
147 GST_LOG_OBJECT (e, " type: %08x", input.type);
148 GST_LOG_OBJECT (e, " audioset: %08x", input.audioset);
149 GST_LOG_OBJECT (e, " std: %016" G_GINT64_MODIFIER "x",
150 (guint64) input.std);
151 GST_LOG_OBJECT (e, " status: %08x", input.status);
153 v4l2channel = g_object_new (GST_TYPE_V4L2_TUNER_CHANNEL, NULL);
154 channel = GST_TUNER_CHANNEL (v4l2channel);
155 channel->label = g_strdup ((const gchar *) input.name);
156 channel->flags = GST_TUNER_CHANNEL_INPUT;
157 v4l2channel->index = n;
159 if (input.type == V4L2_INPUT_TYPE_TUNER) {
160 struct v4l2_tuner vtun;
162 v4l2channel->tuner = input.tuner;
163 channel->flags |= GST_TUNER_CHANNEL_FREQUENCY;
165 vtun.index = input.tuner;
166 if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_G_TUNER, &vtun) < 0) {
167 GST_ELEMENT_ERROR (e, RESOURCE, SETTINGS,
168 (_("Failed to get setting of tuner %d on device '%s'."),
169 input.tuner, v4l2object->videodev), GST_ERROR_SYSTEM);
170 g_object_unref (G_OBJECT (channel));
174 channel->freq_multiplicator =
175 62.5 * ((vtun.capability & V4L2_TUNER_CAP_LOW) ? 1 : 1000);
176 channel->min_frequency = vtun.rangelow * channel->freq_multiplicator;
177 channel->max_frequency = vtun.rangehigh * channel->freq_multiplicator;
178 channel->min_signal = 0;
179 channel->max_signal = 0xffff;
181 if (input.audioset) {
182 /* we take the first. We don't care for
183 * the others for now */
184 while (!(input.audioset & (1 << v4l2channel->audio)))
185 v4l2channel->audio++;
186 channel->flags |= GST_TUNER_CHANNEL_AUDIO;
189 v4l2object->channels =
190 g_list_prepend (v4l2object->channels, (gpointer) channel);
192 v4l2object->channels = g_list_reverse (v4l2object->channels);
194 GST_DEBUG_OBJECT (e, " norms");
197 struct v4l2_standard standard = { 0, };
198 GstV4l2TunerNorm *v4l2norm;
202 /* fill in defaults */
203 standard.frameperiod.numerator = 1;
204 standard.frameperiod.denominator = 0;
207 if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_ENUMSTD, &standard) < 0) {
208 if (errno == EINVAL || errno == ENOTTY || errno == ENODATA)
209 break; /* end of enumeration */
211 GST_ELEMENT_ERROR (e, RESOURCE, SETTINGS,
212 (_("Failed to query norm on device '%s'."),
213 v4l2object->videodev),
214 ("Failed to get attributes for norm %d on devide '%s'. (%d - %s)",
215 n, v4l2object->videodev, errno, strerror (errno)));
220 GST_DEBUG_OBJECT (e, " '%s', fps: %d / %d",
221 standard.name, standard.frameperiod.denominator,
222 standard.frameperiod.numerator);
224 v4l2norm = g_object_new (GST_TYPE_V4L2_TUNER_NORM, NULL);
225 norm = GST_TUNER_NORM (v4l2norm);
226 norm->label = g_strdup ((const gchar *) standard.name);
227 gst_value_set_fraction (&norm->framerate,
228 standard.frameperiod.denominator, standard.frameperiod.numerator);
229 v4l2norm->index = standard.id;
231 GST_DEBUG_OBJECT (v4l2object->element, "index=%08x, label=%s",
232 (unsigned int) v4l2norm->index, norm->label);
234 v4l2object->norms = g_list_prepend (v4l2object->norms, (gpointer) norm);
236 v4l2object->norms = g_list_reverse (v4l2object->norms);
238 GST_DEBUG_OBJECT (e, " controls+menus");
240 /* and lastly, controls+menus (if appropriate) */
241 #ifdef V4L2_CTRL_FLAG_NEXT_CTRL
242 next = V4L2_CTRL_FLAG_NEXT_CTRL;
250 GstV4l2ColorBalanceChannel *v4l2channel;
251 GstColorBalanceChannel *channel;
256 /* when we reached the last official CID, continue with private CIDs */
257 if (n == V4L2_CID_LASTP1) {
258 GST_DEBUG_OBJECT (e, "checking private CIDs");
259 n = V4L2_CID_PRIVATE_BASE;
261 GST_DEBUG_OBJECT (e, "checking control %08x", n);
263 control.id = n | next;
264 if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_QUERYCTRL, &control) < 0) {
267 GST_DEBUG_OBJECT (e, "controls finished");
270 GST_DEBUG_OBJECT (e, "V4L2_CTRL_FLAG_NEXT_CTRL not supported.");
276 if (errno == EINVAL || errno == ENOTTY || errno == EIO || errno == ENOENT) {
277 if (n < V4L2_CID_PRIVATE_BASE) {
278 GST_DEBUG_OBJECT (e, "skipping control %08x", n);
279 /* continue so that we also check private controls */
282 GST_DEBUG_OBJECT (e, "controls finished");
286 GST_WARNING_OBJECT (e, "Failed querying control %d on device '%s'. "
287 "(%d - %s)", n, v4l2object->videodev, errno, strerror (errno));
292 if (control.flags & V4L2_CTRL_FLAG_DISABLED) {
293 GST_DEBUG_OBJECT (e, "skipping disabled control");
296 #ifdef V4L2_CTRL_TYPE_CTRL_CLASS
297 if (control.type == V4L2_CTRL_TYPE_CTRL_CLASS) {
298 GST_DEBUG_OBJECT (e, "starting control class '%s'", control.name);
302 switch (control.type) {
303 case V4L2_CTRL_TYPE_INTEGER:
304 case V4L2_CTRL_TYPE_BOOLEAN:
305 case V4L2_CTRL_TYPE_MENU:
306 #ifdef V4L2_CTRL_TYPE_INTEGER_MENU
307 case V4L2_CTRL_TYPE_INTEGER_MENU:
309 #ifdef V4L2_CTRL_TYPE_BITMASK
310 case V4L2_CTRL_TYPE_BITMASK:
312 case V4L2_CTRL_TYPE_BUTTON:{
314 control.name[31] = '\0';
315 for (i = 0; control.name[i]; ++i) {
316 control.name[i] = g_ascii_tolower (control.name[i]);
317 if (!g_ascii_isalnum (control.name[i]))
318 control.name[i] = '_';
320 GST_INFO_OBJECT (e, "adding generic controls '%s'", control.name);
321 g_datalist_id_set_data (&v4l2object->controls,
322 g_quark_from_string ((const gchar *) control.name),
323 GINT_TO_POINTER (n));
328 "Control type for '%s' not suppored for extra controls.",
334 case V4L2_CID_BRIGHTNESS:
335 case V4L2_CID_CONTRAST:
336 case V4L2_CID_SATURATION:
338 case V4L2_CID_BLACK_LEVEL:
339 case V4L2_CID_AUTO_WHITE_BALANCE:
340 case V4L2_CID_DO_WHITE_BALANCE:
341 case V4L2_CID_RED_BALANCE:
342 case V4L2_CID_BLUE_BALANCE:
344 case V4L2_CID_EXPOSURE:
345 case V4L2_CID_AUTOGAIN:
347 #ifdef V4L2_CID_SHARPNESS
348 case V4L2_CID_SHARPNESS:
350 /* we only handle these for now (why?) */
354 #ifndef V4L2_CID_PAN_RESET
355 case V4L2_CID_HCENTER:
357 #ifndef V4L2_CID_TILT_RESET
358 case V4L2_CID_VCENTER:
360 #ifdef V4L2_CID_PAN_RESET
361 case V4L2_CID_PAN_RESET:
363 #ifdef V4L2_CID_TILT_RESET
364 case V4L2_CID_TILT_RESET:
366 /* not handled here, handled by VideoOrientation interface */
369 case V4L2_CID_AUDIO_VOLUME:
370 case V4L2_CID_AUDIO_BALANCE:
371 case V4L2_CID_AUDIO_BASS:
372 case V4L2_CID_AUDIO_TREBLE:
373 case V4L2_CID_AUDIO_MUTE:
374 case V4L2_CID_AUDIO_LOUDNESS:
375 /* FIXME: We should implement GstMixer interface */
379 "ControlID %s (%x) unhandled, FIXME", control.name, n);
386 GST_DEBUG_OBJECT (e, "Adding ControlID %s (%x)", control.name, n);
387 v4l2channel = g_object_new (GST_TYPE_V4L2_COLOR_BALANCE_CHANNEL, NULL);
388 channel = GST_COLOR_BALANCE_CHANNEL (v4l2channel);
389 channel->label = g_strdup ((const gchar *) control.name);
393 /* FIXME: it will be need just when handling private controls
394 *(currently none of base controls are of this type) */
395 if (control.type == V4L2_CTRL_TYPE_MENU) {
396 struct v4l2_querymenu menu, *mptr;
403 if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_QUERYMENU, &menu) < 0) {
405 break; /* end of enumeration */
407 GST_ELEMENT_ERROR (e, RESOURCE, SETTINGS,
408 (_("Failed getting controls attributes on device '%s'."),
409 v4l2object->videodev),
410 ("Failed to get %d in menu enumeration for %s. (%d - %s)",
411 n, v4l2object->videodev, errno, strerror (errno)));
415 mptr = g_malloc (sizeof (menu));
416 memcpy (mptr, &menu, sizeof (menu));
417 menus = g_list_append (menus, mptr);
420 v4l2object->menus = g_list_append (v4l2object->menus, menus);
423 switch (control.type) {
424 case V4L2_CTRL_TYPE_INTEGER:
425 channel->min_value = control.minimum;
426 channel->max_value = control.maximum;
428 case V4L2_CTRL_TYPE_BOOLEAN:
429 channel->min_value = FALSE;
430 channel->max_value = TRUE;
433 /* FIXME we should find out how to handle V4L2_CTRL_TYPE_BUTTON.
434 BUTTON controls like V4L2_CID_DO_WHITE_BALANCE can just be set (1) or
435 unset (0), but can't be queried */
437 "Control with non supported type %s (%x), type=%d",
438 control.name, n, control.type);
439 channel->min_value = channel->max_value = 0;
444 g_list_prepend (v4l2object->colors, (gpointer) channel);
446 v4l2object->colors = g_list_reverse (v4l2object->colors);
448 GST_DEBUG_OBJECT (e, "done");
454 gst_v4l2_empty_lists (GstV4l2Object * v4l2object)
456 GST_DEBUG_OBJECT (v4l2object->element, "deleting enumerations");
458 g_list_foreach (v4l2object->channels, (GFunc) g_object_unref, NULL);
459 g_list_free (v4l2object->channels);
460 v4l2object->channels = NULL;
462 g_list_foreach (v4l2object->norms, (GFunc) g_object_unref, NULL);
463 g_list_free (v4l2object->norms);
464 v4l2object->norms = NULL;
466 g_list_foreach (v4l2object->colors, (GFunc) g_object_unref, NULL);
467 g_list_free (v4l2object->colors);
468 v4l2object->colors = NULL;
470 g_datalist_clear (&v4l2object->controls);
473 /******************************************************
475 * open the video device (v4l2object->videodev)
476 * return value: TRUE on success, FALSE on error
477 ******************************************************/
479 gst_v4l2_open (GstV4l2Object * v4l2object)
483 GstPollFD pollfd = GST_POLL_FD_INIT;
485 GST_DEBUG_OBJECT (v4l2object->element, "Trying to open device %s",
486 v4l2object->videodev);
488 GST_V4L2_CHECK_NOT_OPEN (v4l2object);
489 GST_V4L2_CHECK_NOT_ACTIVE (v4l2object);
491 /* be sure we have a device */
492 if (!v4l2object->videodev)
493 v4l2object->videodev = g_strdup ("/dev/video");
495 /* check if it is a device */
496 if (stat (v4l2object->videodev, &st) == -1)
499 if (!S_ISCHR (st.st_mode))
502 /* open the device */
503 v4l2object->video_fd =
504 open (v4l2object->videodev, O_RDWR /* | O_NONBLOCK */ );
506 if (!GST_V4L2_IS_OPEN (v4l2object))
509 libv4l2_fd = v4l2_fd_open (v4l2object->video_fd,
510 V4L2_ENABLE_ENUM_FMT_EMULATION);
511 /* Note the v4l2_xxx functions are designed so that if they get passed an
512 unknown fd, the will behave exactly as their regular xxx counterparts, so
513 if v4l2_fd_open fails, we continue as normal (missing the libv4l2 custom
514 cam format to normal formats conversion). Chances are big we will still
515 fail then though, as normally v4l2_fd_open only fails if the device is not
517 if (libv4l2_fd != -1)
518 v4l2object->video_fd = libv4l2_fd;
520 v4l2object->can_poll_device = TRUE;
522 /* get capabilities, error will be posted */
523 if (!gst_v4l2_get_capabilities (v4l2object))
526 /* do we need to be a capture device? */
527 if (GST_IS_V4L2SRC (v4l2object->element) &&
528 !(v4l2object->vcap.capabilities & (V4L2_CAP_VIDEO_CAPTURE |
529 V4L2_CAP_VIDEO_CAPTURE_MPLANE)))
532 if (GST_IS_V4L2SINK (v4l2object->element) &&
533 !(v4l2object->vcap.capabilities & (V4L2_CAP_VIDEO_OUTPUT |
534 V4L2_CAP_VIDEO_OUTPUT_MPLANE)))
537 /* when calling gst_v4l2_object_new the user decides the initial type
538 * so adjust it if multi-planar is supported
539 * the driver should make it exclusive. So the driver should
540 * not support both MPLANE and non-PLANE.
541 * Because even when using MPLANE it still possibles to use it
542 * in a contiguous manner. In this case the first v4l2 plane
543 * contains all the gst planes.
545 switch (v4l2object->type) {
546 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
547 if (v4l2object->vcap.capabilities & V4L2_CAP_VIDEO_OUTPUT_MPLANE) {
548 GST_DEBUG ("adjust type to multi-planar output");
549 v4l2object->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
552 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
553 if (v4l2object->vcap.capabilities & V4L2_CAP_VIDEO_CAPTURE_MPLANE) {
554 /* FIXME: for now it's an untested case so just put a warning */
555 GST_WARNING ("untested V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE");
557 GST_DEBUG ("adjust type to multi-planar capture");
558 v4l2object->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
565 /* create enumerations, posts errors. */
566 if (!gst_v4l2_fill_lists (v4l2object))
569 GST_INFO_OBJECT (v4l2object->element,
570 "Opened device '%s' (%s) successfully",
571 v4l2object->vcap.card, v4l2object->videodev);
573 pollfd.fd = v4l2object->video_fd;
574 gst_poll_add_fd (v4l2object->poll, &pollfd);
575 if (v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE
576 || v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
577 gst_poll_fd_ctl_read (v4l2object->poll, &pollfd, TRUE);
579 gst_poll_fd_ctl_write (v4l2object->poll, &pollfd, TRUE);
581 if (v4l2object->extra_controls)
582 gst_v4l2_set_controls (v4l2object, v4l2object->extra_controls);
589 GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, NOT_FOUND,
590 (_("Cannot identify device '%s'."), v4l2object->videodev),
596 GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, NOT_FOUND,
597 (_("This isn't a device '%s'."), v4l2object->videodev),
603 GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, OPEN_READ_WRITE,
604 (_("Could not open device '%s' for reading and writing."),
605 v4l2object->videodev), GST_ERROR_SYSTEM);
610 GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, NOT_FOUND,
611 (_("Device '%s' is not a capture device."),
612 v4l2object->videodev),
613 ("Capabilities: 0x%x", v4l2object->vcap.capabilities));
618 GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, NOT_FOUND,
619 (_("Device '%s' is not a output device."),
620 v4l2object->videodev),
621 ("Capabilities: 0x%x", v4l2object->vcap.capabilities));
626 if (GST_V4L2_IS_OPEN (v4l2object)) {
628 v4l2_close (v4l2object->video_fd);
629 v4l2object->video_fd = -1;
632 gst_v4l2_empty_lists (v4l2object);
639 /******************************************************
641 * close the video device (v4l2object->video_fd)
642 * return value: TRUE on success, FALSE on error
643 ******************************************************/
645 gst_v4l2_close (GstV4l2Object * v4l2object)
647 GstPollFD pollfd = GST_POLL_FD_INIT;
648 GST_DEBUG_OBJECT (v4l2object->element, "Trying to close %s",
649 v4l2object->videodev);
651 GST_V4L2_CHECK_OPEN (v4l2object);
652 GST_V4L2_CHECK_NOT_ACTIVE (v4l2object);
655 v4l2_close (v4l2object->video_fd);
656 pollfd.fd = v4l2object->video_fd;
657 gst_poll_remove_fd (v4l2object->poll, &pollfd);
658 v4l2object->video_fd = -1;
661 gst_v4l2_empty_lists (v4l2object);
667 /******************************************************
668 * gst_v4l2_get_norm()
669 * Get the norm of the current device
670 * return value: TRUE on success, FALSE on error
671 ******************************************************/
673 gst_v4l2_get_norm (GstV4l2Object * v4l2object, v4l2_std_id * norm)
675 GST_DEBUG_OBJECT (v4l2object->element, "getting norm");
677 if (!GST_V4L2_IS_OPEN (v4l2object))
680 if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_G_STD, norm) < 0)
688 GST_DEBUG ("Failed to get the current norm for device %s",
689 v4l2object->videodev);
695 /******************************************************
696 * gst_v4l2_set_norm()
697 * Set the norm of the current device
698 * return value: TRUE on success, FALSE on error
699 ******************************************************/
701 gst_v4l2_set_norm (GstV4l2Object * v4l2object, v4l2_std_id norm)
703 GST_DEBUG_OBJECT (v4l2object->element, "trying to set norm to "
704 "%" G_GINT64_MODIFIER "x", (guint64) norm);
706 if (!GST_V4L2_IS_OPEN (v4l2object))
709 if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_S_STD, &norm) < 0)
717 GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS,
718 (_("Failed to set norm for device '%s'."),
719 v4l2object->videodev), GST_ERROR_SYSTEM);
724 /******************************************************
725 * gst_v4l2_get_frequency():
726 * get the current frequency
727 * return value: TRUE on success, FALSE on error
728 ******************************************************/
730 gst_v4l2_get_frequency (GstV4l2Object * v4l2object,
731 gint tunernum, gulong * frequency)
733 struct v4l2_frequency freq = { 0, };
735 GstTunerChannel *channel;
737 GST_DEBUG_OBJECT (v4l2object->element, "getting current tuner frequency");
739 if (!GST_V4L2_IS_OPEN (v4l2object))
742 channel = gst_tuner_get_channel (GST_TUNER (v4l2object->element));
744 freq.tuner = tunernum;
745 if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_G_FREQUENCY, &freq) < 0)
748 *frequency = freq.frequency * channel->freq_multiplicator;
755 GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS,
756 (_("Failed to get current tuner frequency for device '%s'."),
757 v4l2object->videodev), GST_ERROR_SYSTEM);
763 /******************************************************
764 * gst_v4l2_set_frequency():
766 * return value: TRUE on success, FALSE on error
767 ******************************************************/
769 gst_v4l2_set_frequency (GstV4l2Object * v4l2object,
770 gint tunernum, gulong frequency)
772 struct v4l2_frequency freq = { 0, };
774 GstTunerChannel *channel;
776 GST_DEBUG_OBJECT (v4l2object->element,
777 "setting current tuner frequency to %lu", frequency);
779 if (!GST_V4L2_IS_OPEN (v4l2object))
782 channel = gst_tuner_get_channel (GST_TUNER (v4l2object->element));
784 freq.tuner = tunernum;
785 /* fill in type - ignore error */
786 v4l2_ioctl (v4l2object->video_fd, VIDIOC_G_FREQUENCY, &freq);
787 freq.frequency = frequency / channel->freq_multiplicator;
789 if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_S_FREQUENCY, &freq) < 0)
797 GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS,
798 (_("Failed to set current tuner frequency for device '%s' to %lu Hz."),
799 v4l2object->videodev, frequency), GST_ERROR_SYSTEM);
804 /******************************************************
805 * gst_v4l2_signal_strength():
806 * get the strength of the signal on the current input
807 * return value: TRUE on success, FALSE on error
808 ******************************************************/
810 gst_v4l2_signal_strength (GstV4l2Object * v4l2object,
811 gint tunernum, gulong * signal_strength)
813 struct v4l2_tuner tuner = { 0, };
815 GST_DEBUG_OBJECT (v4l2object->element, "trying to get signal strength");
817 if (!GST_V4L2_IS_OPEN (v4l2object))
820 tuner.index = tunernum;
821 if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_G_TUNER, &tuner) < 0)
824 *signal_strength = tuner.signal;
831 GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS,
832 (_("Failed to get signal strength for device '%s'."),
833 v4l2object->videodev), GST_ERROR_SYSTEM);
838 /******************************************************
839 * gst_v4l2_get_attribute():
840 * try to get the value of one specific attribute
841 * return value: TRUE on success, FALSE on error
842 ******************************************************/
844 gst_v4l2_get_attribute (GstV4l2Object * v4l2object,
845 int attribute_num, int *value)
847 struct v4l2_control control = { 0, };
849 GST_DEBUG_OBJECT (v4l2object->element, "getting value of attribute %d",
852 if (!GST_V4L2_IS_OPEN (v4l2object))
855 control.id = attribute_num;
857 if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_G_CTRL, &control) < 0)
860 *value = control.value;
867 GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS,
868 (_("Failed to get value for control %d on device '%s'."),
869 attribute_num, v4l2object->videodev), GST_ERROR_SYSTEM);
875 /******************************************************
876 * gst_v4l2_set_attribute():
877 * try to set the value of one specific attribute
878 * return value: TRUE on success, FALSE on error
879 ******************************************************/
881 gst_v4l2_set_attribute (GstV4l2Object * v4l2object,
882 int attribute_num, const int value)
884 struct v4l2_control control = { 0, };
886 GST_DEBUG_OBJECT (v4l2object->element, "setting value of attribute %d to %d",
887 attribute_num, value);
889 if (!GST_V4L2_IS_OPEN (v4l2object))
892 control.id = attribute_num;
893 control.value = value;
894 if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_S_CTRL, &control) < 0)
902 GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS,
903 (_("Failed to set value %d for control %d on device '%s'."),
904 value, attribute_num, v4l2object->videodev), GST_ERROR_SYSTEM);
910 set_contol (GQuark field_id, const GValue * value, gpointer user_data)
912 GstV4l2Object *v4l2object = user_data;
913 gpointer *d = g_datalist_id_get_data (&v4l2object->controls, field_id);
915 GST_WARNING_OBJECT (v4l2object,
916 "Control '%s' does not exist or has an unsupported type.",
917 g_quark_to_string (field_id));
920 if (!G_VALUE_HOLDS (value, G_TYPE_INT)) {
921 GST_WARNING_OBJECT (v4l2object,
922 "'int' value expected for control '%s'.", g_quark_to_string (field_id));
925 gst_v4l2_set_attribute (v4l2object, GPOINTER_TO_INT (d),
926 g_value_get_int (value));
931 gst_v4l2_set_controls (GstV4l2Object * v4l2object, GstStructure * controls)
933 return gst_structure_foreach (controls, set_contol, v4l2object);
937 gst_v4l2_get_input (GstV4l2Object * v4l2object, gint * input)
941 GST_DEBUG_OBJECT (v4l2object->element, "trying to get input");
943 if (!GST_V4L2_IS_OPEN (v4l2object))
946 if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_G_INPUT, &n) < 0)
951 GST_DEBUG_OBJECT (v4l2object->element, "input: %d", n);
957 if (v4l2object->vcap.capabilities & V4L2_CAP_TUNER) {
958 /* only give a warning message if driver actually claims to have tuner
961 GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS,
962 (_("Failed to get current input on device '%s'. May be it is a radio device"), v4l2object->videodev), GST_ERROR_SYSTEM);
968 gst_v4l2_set_input (GstV4l2Object * v4l2object, gint input)
970 GST_DEBUG_OBJECT (v4l2object->element, "trying to set input to %d", input);
972 if (!GST_V4L2_IS_OPEN (v4l2object))
975 if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_S_INPUT, &input) < 0)
982 if (v4l2object->vcap.capabilities & V4L2_CAP_TUNER) {
983 /* only give a warning message if driver actually claims to have tuner
986 GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS,
987 (_("Failed to set input %d on device %s."),
988 input, v4l2object->videodev), GST_ERROR_SYSTEM);
994 gst_v4l2_get_output (GstV4l2Object * v4l2object, gint * output)
998 GST_DEBUG_OBJECT (v4l2object->element, "trying to get output");
1000 if (!GST_V4L2_IS_OPEN (v4l2object))
1003 if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_G_OUTPUT, &n) < 0)
1008 GST_DEBUG_OBJECT (v4l2object->element, "output: %d", n);
1014 if (v4l2object->vcap.capabilities & V4L2_CAP_TUNER) {
1015 /* only give a warning message if driver actually claims to have tuner
1018 GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS,
1019 (_("Failed to get current output on device '%s'. May be it is a radio device"), v4l2object->videodev), GST_ERROR_SYSTEM);
1025 gst_v4l2_set_output (GstV4l2Object * v4l2object, gint output)
1027 GST_DEBUG_OBJECT (v4l2object->element, "trying to set output to %d", output);
1029 if (!GST_V4L2_IS_OPEN (v4l2object))
1032 if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_S_OUTPUT, &output) < 0)
1039 if (v4l2object->vcap.capabilities & V4L2_CAP_TUNER) {
1040 /* only give a warning message if driver actually claims to have tuner
1043 GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS,
1044 (_("Failed to set output %d on device %s."),
1045 output, v4l2object->videodev), GST_ERROR_SYSTEM);