mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-08 13:18:52 +00:00
Gratuitous micro-optimisation - prepend to lists and reverse them, rather than appending to them each time.
830 lines
24 KiB
C
830 lines
24 KiB
C
/* GStreamer
|
|
*
|
|
* Copyright (C) 2002 Ronald Bultje <rbultje@ronald.bitfreak.net>
|
|
* 2006 Edgard Lima <edgard.lima@indt.org.br>
|
|
*
|
|
* v4l2_calls.c - generic V4L2 calls handling
|
|
*
|
|
* 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, USA.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include <config.h>
|
|
#endif
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/mman.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include <unistd.h>
|
|
#ifdef __sun
|
|
/* Needed on older Solaris Nevada builds (72 at least) */
|
|
#include <stropts.h>
|
|
#include <sys/ioccom.h>
|
|
#endif
|
|
#include "v4l2_calls.h"
|
|
#include "gstv4l2tuner.h"
|
|
#if 0
|
|
#include "gstv4l2xoverlay.h"
|
|
#endif
|
|
#include "gstv4l2colorbalance.h"
|
|
|
|
#include "gstv4l2src.h"
|
|
|
|
/* Those are ioctl calls */
|
|
#ifndef V4L2_CID_HCENTER
|
|
#define V4L2_CID_HCENTER V4L2_CID_HCENTER_DEPRECATED
|
|
#endif
|
|
#ifndef V4L2_CID_VCENTER
|
|
#define V4L2_CID_VCENTER V4L2_CID_VCENTER_DEPRECATED
|
|
#endif
|
|
|
|
GST_DEBUG_CATEGORY_EXTERN (v4l2_debug);
|
|
#define GST_CAT_DEFAULT v4l2_debug
|
|
|
|
/******************************************************
|
|
* gst_v4l2_get_capabilities():
|
|
* get the device's capturing capabilities
|
|
* return value: TRUE on success, FALSE on error
|
|
******************************************************/
|
|
gboolean
|
|
gst_v4l2_get_capabilities (GstV4l2Object * v4l2object)
|
|
{
|
|
GstElement *e;
|
|
|
|
e = v4l2object->element;
|
|
|
|
GST_DEBUG_OBJECT (e, "getting capabilities");
|
|
|
|
if (!GST_V4L2_IS_OPEN (v4l2object))
|
|
return FALSE;
|
|
|
|
if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_QUERYCAP, &v4l2object->vcap) < 0)
|
|
goto cap_failed;
|
|
|
|
GST_LOG_OBJECT (e, "driver: '%s'", v4l2object->vcap.driver);
|
|
GST_LOG_OBJECT (e, "card: '%s'", v4l2object->vcap.card);
|
|
GST_LOG_OBJECT (e, "bus_info: '%s'", v4l2object->vcap.bus_info);
|
|
GST_LOG_OBJECT (e, "version: %08x", v4l2object->vcap.version);
|
|
GST_LOG_OBJECT (e, "capabilites: %08x", v4l2object->vcap.capabilities);
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
cap_failed:
|
|
{
|
|
GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS,
|
|
(_("Error getting capabilities for device '%s': "
|
|
"It isn't a v4l2 driver. Check if it is a v4l1 driver."),
|
|
v4l2object->videodev), GST_ERROR_SYSTEM);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
|
|
/******************************************************
|
|
* gst_v4l2_empty_lists() and gst_v4l2_fill_lists():
|
|
* fill/empty the lists of enumerations
|
|
* return value: TRUE on success, FALSE on error
|
|
******************************************************/
|
|
static gboolean
|
|
gst_v4l2_fill_lists (GstV4l2Object * v4l2object)
|
|
{
|
|
gint n;
|
|
|
|
GstElement *e;
|
|
|
|
e = v4l2object->element;
|
|
|
|
GST_DEBUG_OBJECT (e, "getting enumerations");
|
|
GST_V4L2_CHECK_OPEN (v4l2object);
|
|
|
|
GST_DEBUG_OBJECT (e, " channels");
|
|
/* and now, the channels */
|
|
for (n = 0;; n++) {
|
|
struct v4l2_input input = { 0, };
|
|
GstV4l2TunerChannel *v4l2channel;
|
|
|
|
GstTunerChannel *channel;
|
|
|
|
input.index = n;
|
|
if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_ENUMINPUT, &input) < 0) {
|
|
if (errno == EINVAL)
|
|
break; /* end of enumeration */
|
|
else {
|
|
GST_ELEMENT_ERROR (e, RESOURCE, SETTINGS,
|
|
(_("Failed to query attributes of input %d in device %s"),
|
|
n, v4l2object->videodev),
|
|
("Failed to get %d in input enumeration for %s. (%d - %s)",
|
|
n, v4l2object->videodev, errno, strerror (errno)));
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
GST_LOG_OBJECT (e, " index: %d", input.index);
|
|
GST_LOG_OBJECT (e, " name: '%s'", input.name);
|
|
GST_LOG_OBJECT (e, " type: %08x", input.type);
|
|
GST_LOG_OBJECT (e, " audioset: %08x", input.audioset);
|
|
GST_LOG_OBJECT (e, " std: %016x", input.std);
|
|
GST_LOG_OBJECT (e, " status: %08x", input.status);
|
|
|
|
v4l2channel = g_object_new (GST_TYPE_V4L2_TUNER_CHANNEL, NULL);
|
|
channel = GST_TUNER_CHANNEL (v4l2channel);
|
|
channel->label = g_strdup ((const gchar *) input.name);
|
|
channel->flags = GST_TUNER_CHANNEL_INPUT;
|
|
v4l2channel->index = n;
|
|
|
|
if (input.type == V4L2_INPUT_TYPE_TUNER) {
|
|
struct v4l2_tuner vtun;
|
|
|
|
v4l2channel->tuner = input.tuner;
|
|
channel->flags |= GST_TUNER_CHANNEL_FREQUENCY;
|
|
|
|
vtun.index = input.tuner;
|
|
if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_G_TUNER, &vtun) < 0) {
|
|
GST_ELEMENT_ERROR (e, RESOURCE, SETTINGS,
|
|
(_("Failed to get setting of tuner %d on device '%s'."),
|
|
input.tuner, v4l2object->videodev), GST_ERROR_SYSTEM);
|
|
g_object_unref (G_OBJECT (channel));
|
|
return FALSE;
|
|
}
|
|
|
|
channel->freq_multiplicator =
|
|
62.5 * ((vtun.capability & V4L2_TUNER_CAP_LOW) ? 1 : 1000);
|
|
channel->min_frequency = vtun.rangelow * channel->freq_multiplicator;
|
|
channel->max_frequency = vtun.rangehigh * channel->freq_multiplicator;
|
|
channel->min_signal = 0;
|
|
channel->max_signal = 0xffff;
|
|
}
|
|
if (input.audioset) {
|
|
/* we take the first. We don't care for
|
|
* the others for now */
|
|
while (!(input.audioset & (1 << v4l2channel->audio)))
|
|
v4l2channel->audio++;
|
|
channel->flags |= GST_TUNER_CHANNEL_AUDIO;
|
|
}
|
|
|
|
v4l2object->channels =
|
|
g_list_prepend (v4l2object->channels, (gpointer) channel);
|
|
}
|
|
v4l2object->channels = g_list_reverse (v4l2object->channels);
|
|
|
|
GST_DEBUG_OBJECT (e, " norms");
|
|
/* norms... */
|
|
for (n = 0;; n++) {
|
|
struct v4l2_standard standard = { 0, };
|
|
GstV4l2TunerNorm *v4l2norm;
|
|
|
|
GstTunerNorm *norm;
|
|
|
|
/* fill in defaults */
|
|
standard.frameperiod.numerator = 1;
|
|
standard.frameperiod.denominator = 0;
|
|
standard.index = n;
|
|
|
|
if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_ENUMSTD, &standard) < 0) {
|
|
if (errno == EINVAL || errno == ENOTTY)
|
|
break; /* end of enumeration */
|
|
else {
|
|
GST_ELEMENT_ERROR (e, RESOURCE, SETTINGS,
|
|
(_("Failed to query norm on device '%s'."),
|
|
v4l2object->videodev),
|
|
("Failed to get attributes for norm %d on devide '%s'. (%d - %s)",
|
|
n, v4l2object->videodev, errno, strerror (errno)));
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (e, " '%s', fps: %d / %d",
|
|
standard.name, standard.frameperiod.denominator,
|
|
standard.frameperiod.numerator);
|
|
|
|
v4l2norm = g_object_new (GST_TYPE_V4L2_TUNER_NORM, NULL);
|
|
norm = GST_TUNER_NORM (v4l2norm);
|
|
norm->label = g_strdup ((const gchar *) standard.name);
|
|
gst_value_set_fraction (&norm->framerate,
|
|
standard.frameperiod.denominator, standard.frameperiod.numerator);
|
|
v4l2norm->index = standard.id;
|
|
|
|
v4l2object->norms = g_list_prepend (v4l2object->norms, (gpointer) norm);
|
|
}
|
|
v4l2object->norms = g_list_reverse (v4l2object->norms);
|
|
|
|
GST_DEBUG_OBJECT (e, " controls+menus");
|
|
/* and lastly, controls+menus (if appropriate) */
|
|
for (n = V4L2_CID_BASE;; n++) {
|
|
struct v4l2_queryctrl control = { 0, };
|
|
GstV4l2ColorBalanceChannel *v4l2channel;
|
|
|
|
GstColorBalanceChannel *channel;
|
|
|
|
/* when we reached the last official CID, continue with private CIDs */
|
|
if (n == V4L2_CID_LASTP1) {
|
|
GST_DEBUG_OBJECT (e, "checking private CIDs");
|
|
n = V4L2_CID_PRIVATE_BASE;
|
|
/* FIXME: We are still not handling private controls. We need a new GstInterface
|
|
to export those controls */
|
|
break;
|
|
}
|
|
|
|
control.id = n;
|
|
if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_QUERYCTRL, &control) < 0) {
|
|
if (errno == EINVAL) {
|
|
if (n < V4L2_CID_PRIVATE_BASE)
|
|
/* continue so that we also check private controls */
|
|
continue;
|
|
else
|
|
break;
|
|
} else {
|
|
GST_ELEMENT_ERROR (e, RESOURCE, SETTINGS,
|
|
(_("Failed getting controls attributes on device '%s'."),
|
|
v4l2object->videodev),
|
|
("Failed querying control %d on device '%s'. (%d - %s)",
|
|
n, v4l2object->videodev, errno, strerror (errno)));
|
|
return FALSE;
|
|
}
|
|
}
|
|
if (control.flags & V4L2_CTRL_FLAG_DISABLED)
|
|
continue;
|
|
|
|
switch (n) {
|
|
case V4L2_CID_BRIGHTNESS:
|
|
case V4L2_CID_CONTRAST:
|
|
case V4L2_CID_SATURATION:
|
|
case V4L2_CID_HUE:
|
|
case V4L2_CID_BLACK_LEVEL:
|
|
case V4L2_CID_AUTO_WHITE_BALANCE:
|
|
case V4L2_CID_DO_WHITE_BALANCE:
|
|
case V4L2_CID_RED_BALANCE:
|
|
case V4L2_CID_BLUE_BALANCE:
|
|
case V4L2_CID_GAMMA:
|
|
case V4L2_CID_EXPOSURE:
|
|
case V4L2_CID_AUTOGAIN:
|
|
case V4L2_CID_GAIN:
|
|
/* we only handle these for now (why?) */
|
|
break;
|
|
case V4L2_CID_HFLIP:
|
|
case V4L2_CID_VFLIP:
|
|
case V4L2_CID_HCENTER:
|
|
case V4L2_CID_VCENTER:
|
|
#ifdef V4L2_CID_PAN_RESET
|
|
case V4L2_CID_PAN_RESET:
|
|
#endif
|
|
#ifdef V4L2_CID_TILT_RESET
|
|
case V4L2_CID_TILT_RESET:
|
|
#endif
|
|
/* not handled here, handled by VideoOrientation interface */
|
|
control.id++;
|
|
break;
|
|
case V4L2_CID_AUDIO_VOLUME:
|
|
case V4L2_CID_AUDIO_BALANCE:
|
|
case V4L2_CID_AUDIO_BASS:
|
|
case V4L2_CID_AUDIO_TREBLE:
|
|
case V4L2_CID_AUDIO_MUTE:
|
|
case V4L2_CID_AUDIO_LOUDNESS:
|
|
/* FIXME: We should implement GstMixer interface */
|
|
/* fall through */
|
|
default:
|
|
GST_DEBUG_OBJECT (e,
|
|
"ControlID %s (%x) unhandled, FIXME", control.name, n);
|
|
control.id++;
|
|
break;
|
|
}
|
|
if (n != control.id)
|
|
continue;
|
|
|
|
GST_DEBUG_OBJECT (e, "Adding ControlID %s (%x)", control.name, n);
|
|
v4l2channel = g_object_new (GST_TYPE_V4L2_COLOR_BALANCE_CHANNEL, NULL);
|
|
channel = GST_COLOR_BALANCE_CHANNEL (v4l2channel);
|
|
channel->label = g_strdup ((const gchar *) control.name);
|
|
v4l2channel->id = n;
|
|
|
|
#if 0
|
|
/* FIXME: it will be need just when handling private controls
|
|
*(currently none of base controls are of this type) */
|
|
if (control.type == V4L2_CTRL_TYPE_MENU) {
|
|
struct v4l2_querymenu menu, *mptr;
|
|
|
|
int i;
|
|
|
|
menu.id = n;
|
|
for (i = 0;; i++) {
|
|
menu.index = i;
|
|
if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_QUERYMENU, &menu) < 0) {
|
|
if (errno == EINVAL)
|
|
break; /* end of enumeration */
|
|
else {
|
|
GST_ELEMENT_ERROR (e, RESOURCE, SETTINGS,
|
|
(_("Failed getting controls attributes on device '%s'."),
|
|
v4l2object->videodev),
|
|
("Failed to get %d in menu enumeration for %s. (%d - %s)",
|
|
n, v4l2object->videodev, errno, strerror (errno)));
|
|
return FALSE;
|
|
}
|
|
}
|
|
mptr = g_malloc (sizeof (menu));
|
|
memcpy (mptr, &menu, sizeof (menu));
|
|
menus = g_list_append (menus, mptr);
|
|
}
|
|
}
|
|
v4l2object->menus = g_list_append (v4l2object->menus, menus);
|
|
#endif
|
|
|
|
switch (control.type) {
|
|
case V4L2_CTRL_TYPE_INTEGER:
|
|
channel->min_value = control.minimum;
|
|
channel->max_value = control.maximum;
|
|
break;
|
|
case V4L2_CTRL_TYPE_BOOLEAN:
|
|
channel->min_value = FALSE;
|
|
channel->max_value = TRUE;
|
|
break;
|
|
default:
|
|
/* FIXME we should find out how to handle V4L2_CTRL_TYPE_BUTTON.
|
|
BUTTON controls like V4L2_CID_DO_WHITE_BALANCE can just be set (1) or
|
|
unset (0), but can't be queried */
|
|
GST_DEBUG_OBJECT (e,
|
|
"Control with non supported type %s (%x), type=%d",
|
|
control.name, n, control.type);
|
|
channel->min_value = channel->max_value = 0;
|
|
break;
|
|
}
|
|
|
|
v4l2object->colors =
|
|
g_list_prepend (v4l2object->colors, (gpointer) channel);
|
|
}
|
|
v4l2object->colors = g_list_reverse (v4l2object->colors);
|
|
|
|
GST_DEBUG_OBJECT (e, "done");
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
static void
|
|
gst_v4l2_empty_lists (GstV4l2Object * v4l2object)
|
|
{
|
|
GST_DEBUG_OBJECT (v4l2object->element, "deleting enumerations");
|
|
|
|
g_list_foreach (v4l2object->channels, (GFunc) g_object_unref, NULL);
|
|
g_list_free (v4l2object->channels);
|
|
v4l2object->channels = NULL;
|
|
|
|
g_list_foreach (v4l2object->norms, (GFunc) g_object_unref, NULL);
|
|
g_list_free (v4l2object->norms);
|
|
v4l2object->norms = NULL;
|
|
|
|
g_list_foreach (v4l2object->colors, (GFunc) g_object_unref, NULL);
|
|
g_list_free (v4l2object->colors);
|
|
v4l2object->colors = NULL;
|
|
}
|
|
|
|
/******************************************************
|
|
* gst_v4l2_open():
|
|
* open the video device (v4l2object->videodev)
|
|
* return value: TRUE on success, FALSE on error
|
|
******************************************************/
|
|
gboolean
|
|
gst_v4l2_open (GstV4l2Object * v4l2object)
|
|
{
|
|
struct stat st;
|
|
int libv4l2_fd;
|
|
GstPollFD pollfd = GST_POLL_FD_INIT;
|
|
|
|
GST_DEBUG_OBJECT (v4l2object->element, "Trying to open device %s",
|
|
v4l2object->videodev);
|
|
|
|
GST_V4L2_CHECK_NOT_OPEN (v4l2object);
|
|
GST_V4L2_CHECK_NOT_ACTIVE (v4l2object);
|
|
|
|
/* be sure we have a device */
|
|
if (!v4l2object->videodev)
|
|
v4l2object->videodev = g_strdup ("/dev/video");
|
|
|
|
/* check if it is a device */
|
|
if (stat (v4l2object->videodev, &st) == -1)
|
|
goto stat_failed;
|
|
|
|
if (!S_ISCHR (st.st_mode))
|
|
goto no_device;
|
|
|
|
/* open the device */
|
|
v4l2object->video_fd =
|
|
open (v4l2object->videodev, O_RDWR /* | O_NONBLOCK */ );
|
|
|
|
if (!GST_V4L2_IS_OPEN (v4l2object))
|
|
goto not_open;
|
|
|
|
libv4l2_fd = v4l2_fd_open (v4l2object->video_fd,
|
|
V4L2_ENABLE_ENUM_FMT_EMULATION);
|
|
/* Note the v4l2_xxx functions are designed so that if they get passed an
|
|
unknown fd, the will behave exactly as their regular xxx counterparts, so
|
|
if v4l2_fd_open fails, we continue as normal (missing the libv4l2 custom
|
|
cam format to normal formats conversion). Chances are big we will still
|
|
fail then though, as normally v4l2_fd_open only fails if the device is not
|
|
a v4l2 device. */
|
|
if (libv4l2_fd != -1)
|
|
v4l2object->video_fd = libv4l2_fd;
|
|
|
|
/* get capabilities, error will be posted */
|
|
if (!gst_v4l2_get_capabilities (v4l2object))
|
|
goto error;
|
|
|
|
/* do we need to be a capture device? */
|
|
if (GST_IS_V4L2SRC (v4l2object) &&
|
|
!(v4l2object->vcap.capabilities & V4L2_CAP_VIDEO_CAPTURE))
|
|
goto not_capture;
|
|
|
|
/* create enumerations, posts errors. */
|
|
if (!gst_v4l2_fill_lists (v4l2object))
|
|
goto error;
|
|
|
|
GST_INFO_OBJECT (v4l2object->element,
|
|
"Opened device '%s' (%s) successfully",
|
|
v4l2object->vcap.card, v4l2object->videodev);
|
|
|
|
pollfd.fd = v4l2object->video_fd;
|
|
gst_poll_add_fd (v4l2object->poll, &pollfd);
|
|
gst_poll_fd_ctl_read (v4l2object->poll, &pollfd, TRUE);
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
stat_failed:
|
|
{
|
|
GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, NOT_FOUND,
|
|
(_("Cannot identify device '%s'."), v4l2object->videodev),
|
|
GST_ERROR_SYSTEM);
|
|
goto error;
|
|
}
|
|
no_device:
|
|
{
|
|
GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, NOT_FOUND,
|
|
(_("This isn't a device '%s'."), v4l2object->videodev),
|
|
GST_ERROR_SYSTEM);
|
|
goto error;
|
|
}
|
|
not_open:
|
|
{
|
|
GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, OPEN_READ_WRITE,
|
|
(_("Could not open device '%s' for reading and writing."),
|
|
v4l2object->videodev), GST_ERROR_SYSTEM);
|
|
goto error;
|
|
}
|
|
not_capture:
|
|
{
|
|
GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, NOT_FOUND,
|
|
(_("Device '%s' is not a capture device."),
|
|
v4l2object->videodev),
|
|
("Capabilities: 0x%x", v4l2object->vcap.capabilities));
|
|
goto error;
|
|
}
|
|
error:
|
|
{
|
|
if (GST_V4L2_IS_OPEN (v4l2object)) {
|
|
/* close device */
|
|
v4l2_close (v4l2object->video_fd);
|
|
v4l2object->video_fd = -1;
|
|
}
|
|
/* empty lists */
|
|
gst_v4l2_empty_lists (v4l2object);
|
|
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
|
|
/******************************************************
|
|
* gst_v4l2_close():
|
|
* close the video device (v4l2object->video_fd)
|
|
* return value: TRUE on success, FALSE on error
|
|
******************************************************/
|
|
gboolean
|
|
gst_v4l2_close (GstV4l2Object * v4l2object)
|
|
{
|
|
GstPollFD pollfd = GST_POLL_FD_INIT;
|
|
GST_DEBUG_OBJECT (v4l2object->element, "Trying to close %s",
|
|
v4l2object->videodev);
|
|
|
|
GST_V4L2_CHECK_OPEN (v4l2object);
|
|
GST_V4L2_CHECK_NOT_ACTIVE (v4l2object);
|
|
|
|
/* close device */
|
|
v4l2_close (v4l2object->video_fd);
|
|
pollfd.fd = v4l2object->video_fd;
|
|
gst_poll_remove_fd (v4l2object->poll, &pollfd);
|
|
v4l2object->video_fd = -1;
|
|
|
|
/* empty lists */
|
|
gst_v4l2_empty_lists (v4l2object);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/******************************************************
|
|
* gst_v4l2_get_norm()
|
|
* Get the norm of the current device
|
|
* return value: TRUE on success, FALSE on error
|
|
******************************************************/
|
|
gboolean
|
|
gst_v4l2_get_norm (GstV4l2Object * v4l2object, v4l2_std_id * norm)
|
|
{
|
|
GST_DEBUG_OBJECT (v4l2object->element, "getting norm");
|
|
|
|
if (!GST_V4L2_IS_OPEN (v4l2object))
|
|
return FALSE;
|
|
|
|
if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_G_STD, norm) < 0)
|
|
goto std_failed;
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
std_failed:
|
|
{
|
|
GST_DEBUG ("Failed to get the current norm for device %s",
|
|
v4l2object->videodev);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
|
|
/******************************************************
|
|
* gst_v4l2_set_norm()
|
|
* Set the norm of the current device
|
|
* return value: TRUE on success, FALSE on error
|
|
******************************************************/
|
|
gboolean
|
|
gst_v4l2_set_norm (GstV4l2Object * v4l2object, v4l2_std_id norm)
|
|
{
|
|
GST_DEBUG_OBJECT (v4l2object->element, "trying to set norm to %llx", norm);
|
|
|
|
if (!GST_V4L2_IS_OPEN (v4l2object))
|
|
return FALSE;
|
|
|
|
if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_S_STD, &norm) < 0)
|
|
goto std_failed;
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
std_failed:
|
|
{
|
|
GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS,
|
|
(_("Failed to set norm for device '%s'."),
|
|
v4l2object->videodev), GST_ERROR_SYSTEM);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/******************************************************
|
|
* gst_v4l2_get_frequency():
|
|
* get the current frequency
|
|
* return value: TRUE on success, FALSE on error
|
|
******************************************************/
|
|
gboolean
|
|
gst_v4l2_get_frequency (GstV4l2Object * v4l2object,
|
|
gint tunernum, gulong * frequency)
|
|
{
|
|
struct v4l2_frequency freq;
|
|
|
|
GstTunerChannel *channel;
|
|
|
|
GST_DEBUG_OBJECT (v4l2object->element, "getting current tuner frequency");
|
|
|
|
if (!GST_V4L2_IS_OPEN (v4l2object))
|
|
return FALSE;
|
|
|
|
channel = gst_tuner_get_channel (GST_TUNER (v4l2object->element));
|
|
|
|
freq.tuner = tunernum;
|
|
if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_G_FREQUENCY, &freq) < 0)
|
|
goto freq_failed;
|
|
|
|
*frequency = freq.frequency * channel->freq_multiplicator;
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
freq_failed:
|
|
{
|
|
GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS,
|
|
(_("Failed to get current tuner frequency for device '%s'."),
|
|
v4l2object->videodev), GST_ERROR_SYSTEM);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
|
|
/******************************************************
|
|
* gst_v4l2_set_frequency():
|
|
* set frequency
|
|
* return value: TRUE on success, FALSE on error
|
|
******************************************************/
|
|
gboolean
|
|
gst_v4l2_set_frequency (GstV4l2Object * v4l2object,
|
|
gint tunernum, gulong frequency)
|
|
{
|
|
struct v4l2_frequency freq;
|
|
|
|
GstTunerChannel *channel;
|
|
|
|
GST_DEBUG_OBJECT (v4l2object->element,
|
|
"setting current tuner frequency to %lu", frequency);
|
|
|
|
if (!GST_V4L2_IS_OPEN (v4l2object))
|
|
return FALSE;
|
|
|
|
channel = gst_tuner_get_channel (GST_TUNER (v4l2object->element));
|
|
|
|
freq.tuner = tunernum;
|
|
/* fill in type - ignore error */
|
|
v4l2_ioctl (v4l2object->video_fd, VIDIOC_G_FREQUENCY, &freq);
|
|
freq.frequency = frequency / channel->freq_multiplicator;
|
|
|
|
if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_S_FREQUENCY, &freq) < 0)
|
|
goto freq_failed;
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
freq_failed:
|
|
{
|
|
GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS,
|
|
(_("Failed to set current tuner frequency for device '%s' to %lu Hz."),
|
|
v4l2object->videodev, frequency), GST_ERROR_SYSTEM);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/******************************************************
|
|
* gst_v4l2_signal_strength():
|
|
* get the strength of the signal on the current input
|
|
* return value: TRUE on success, FALSE on error
|
|
******************************************************/
|
|
gboolean
|
|
gst_v4l2_signal_strength (GstV4l2Object * v4l2object,
|
|
gint tunernum, gulong * signal_strength)
|
|
{
|
|
struct v4l2_tuner tuner;
|
|
|
|
GST_DEBUG_OBJECT (v4l2object->element, "trying to get signal strength");
|
|
|
|
if (!GST_V4L2_IS_OPEN (v4l2object))
|
|
return FALSE;
|
|
|
|
tuner.index = tunernum;
|
|
if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_G_TUNER, &tuner) < 0)
|
|
goto tuner_failed;
|
|
|
|
*signal_strength = tuner.signal;
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
tuner_failed:
|
|
{
|
|
GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS,
|
|
(_("Failed to get signal strength for device '%s'."),
|
|
v4l2object->videodev), GST_ERROR_SYSTEM);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/******************************************************
|
|
* gst_v4l2_get_attribute():
|
|
* try to get the value of one specific attribute
|
|
* return value: TRUE on success, FALSE on error
|
|
******************************************************/
|
|
gboolean
|
|
gst_v4l2_get_attribute (GstV4l2Object * v4l2object,
|
|
int attribute_num, int *value)
|
|
{
|
|
struct v4l2_control control;
|
|
|
|
GST_DEBUG_OBJECT (v4l2object->element, "getting value of attribute %d",
|
|
attribute_num);
|
|
|
|
if (!GST_V4L2_IS_OPEN (v4l2object))
|
|
return FALSE;
|
|
|
|
control.id = attribute_num;
|
|
|
|
if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_G_CTRL, &control) < 0)
|
|
goto ctrl_failed;
|
|
|
|
*value = control.value;
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
ctrl_failed:
|
|
{
|
|
GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS,
|
|
(_("Failed to get value for control %d on device '%s'."),
|
|
attribute_num, v4l2object->videodev), GST_ERROR_SYSTEM);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
|
|
/******************************************************
|
|
* gst_v4l2_set_attribute():
|
|
* try to set the value of one specific attribute
|
|
* return value: TRUE on success, FALSE on error
|
|
******************************************************/
|
|
gboolean
|
|
gst_v4l2_set_attribute (GstV4l2Object * v4l2object,
|
|
int attribute_num, const int value)
|
|
{
|
|
struct v4l2_control control;
|
|
|
|
GST_DEBUG_OBJECT (v4l2object->element, "setting value of attribute %d to %d",
|
|
attribute_num, value);
|
|
|
|
if (!GST_V4L2_IS_OPEN (v4l2object))
|
|
return FALSE;
|
|
|
|
control.id = attribute_num;
|
|
control.value = value;
|
|
if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_S_CTRL, &control) < 0)
|
|
goto ctrl_failed;
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
ctrl_failed:
|
|
{
|
|
GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS,
|
|
(_("Failed to set value %d for control %d on device '%s'."),
|
|
value, attribute_num, v4l2object->videodev), GST_ERROR_SYSTEM);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
gboolean
|
|
gst_v4l2_get_input (GstV4l2Object * v4l2object, gint * input)
|
|
{
|
|
gint n;
|
|
|
|
GST_DEBUG_OBJECT (v4l2object->element, "trying to get input");
|
|
|
|
if (!GST_V4L2_IS_OPEN (v4l2object))
|
|
return FALSE;
|
|
|
|
if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_G_INPUT, &n) < 0)
|
|
goto input_failed;
|
|
|
|
*input = n;
|
|
|
|
GST_DEBUG_OBJECT (v4l2object->element, "input: %d", n);
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
input_failed:
|
|
{
|
|
GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS,
|
|
(_("Failed to get current input on device '%s'. May be it is a radio device"), v4l2object->videodev), GST_ERROR_SYSTEM);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
gboolean
|
|
gst_v4l2_set_input (GstV4l2Object * v4l2object, gint input)
|
|
{
|
|
GST_DEBUG_OBJECT (v4l2object->element, "trying to set input to %d", input);
|
|
|
|
if (!GST_V4L2_IS_OPEN (v4l2object))
|
|
return FALSE;
|
|
|
|
if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_S_INPUT, &input) < 0)
|
|
goto input_failed;
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
input_failed:
|
|
{
|
|
GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS,
|
|
(_("Failed to set input %d on device %s."),
|
|
input, v4l2object->videodev), GST_ERROR_SYSTEM);
|
|
return FALSE;
|
|
}
|
|
}
|