mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-08 13:18:52 +00:00
They're harmless, and some drivers at least return EINVAL instead of ENOTTY for unsupported events (here: uvcvideo). Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/merge_requests/955>
1364 lines
39 KiB
C
1364 lines
39 KiB
C
/* GStreamer
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*
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* Copyright (C) 2002 Ronald Bultje <rbultje@ronald.bitfreak.net>
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* 2006 Edgard Lima <edgard.lima@gmail.com>
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*
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* v4l2_calls.c - generic V4L2 calls handling
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <sys/mman.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#ifdef __sun
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/* Needed on older Solaris Nevada builds (72 at least) */
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#include <stropts.h>
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#include <sys/ioccom.h>
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#endif
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#include "gstv4l2object.h"
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#include "gstv4l2tuner.h"
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#include "gstv4l2colorbalance.h"
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#include "gstv4l2src.h"
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#include "gstv4l2sink.h"
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#include "gstv4l2videodec.h"
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#include "gst/gst-i18n-plugin.h"
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GST_DEBUG_CATEGORY_EXTERN (v4l2_debug);
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#define GST_CAT_DEFAULT v4l2_debug
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/******************************************************
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* gst_v4l2_get_capabilities():
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* get the device's capturing capabilities
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* return value: TRUE on success, FALSE on error
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******************************************************/
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static gboolean
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gst_v4l2_get_capabilities (GstV4l2Object * v4l2object)
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{
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GstElement *e;
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e = v4l2object->element;
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GST_DEBUG_OBJECT (e, "getting capabilities");
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if (!GST_V4L2_IS_OPEN (v4l2object))
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return FALSE;
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if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_QUERYCAP,
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&v4l2object->vcap) < 0)
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goto cap_failed;
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if (v4l2object->vcap.capabilities & V4L2_CAP_DEVICE_CAPS)
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v4l2object->device_caps = v4l2object->vcap.device_caps;
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else
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v4l2object->device_caps = v4l2object->vcap.capabilities;
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GST_LOG_OBJECT (e, "driver: '%s'", v4l2object->vcap.driver);
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GST_LOG_OBJECT (e, "card: '%s'", v4l2object->vcap.card);
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GST_LOG_OBJECT (e, "bus_info: '%s'", v4l2object->vcap.bus_info);
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GST_LOG_OBJECT (e, "version: %08x", v4l2object->vcap.version);
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GST_LOG_OBJECT (e, "capabilities: %08x", v4l2object->device_caps);
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return TRUE;
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/* ERRORS */
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cap_failed:
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{
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GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS,
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(_("Error getting capabilities for device '%s': "
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"It isn't a v4l2 driver. Check if it is a v4l1 driver."),
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v4l2object->videodev), GST_ERROR_SYSTEM);
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return FALSE;
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}
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}
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/******************************************************
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* The video4linux command line tool v4l2-ctrl
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* normalises the names of the controls received from
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* the kernel like:
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*
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* "Exposure (absolute)" -> "exposure_absolute"
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*
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* We follow their lead here. @name is modified
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* in-place.
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******************************************************/
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static void
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gst_v4l2_normalise_control_name (gchar * name)
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{
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int i, j;
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for (i = 0, j = 0; name[j]; ++j) {
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if (g_ascii_isalnum (name[j])) {
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if (i > 0 && !g_ascii_isalnum (name[j - 1]))
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name[i++] = '_';
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name[i++] = g_ascii_tolower (name[j]);
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}
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}
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name[i++] = '\0';
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}
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/******************************************************
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* gst_v4l2_empty_lists() and gst_v4l2_fill_lists():
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* fill/empty the lists of enumerations
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* return value: TRUE on success, FALSE on error
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******************************************************/
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static gboolean
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gst_v4l2_fill_lists (GstV4l2Object * v4l2object)
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{
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gint n, next;
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struct v4l2_queryctrl control = { 0, };
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GstElement *e;
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e = v4l2object->element;
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GST_DEBUG_OBJECT (e, "getting enumerations");
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GST_V4L2_CHECK_OPEN (v4l2object);
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GST_DEBUG_OBJECT (e, " channels");
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/* and now, the channels */
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for (n = 0;; n++) {
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struct v4l2_input input;
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GstV4l2TunerChannel *v4l2channel;
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GstTunerChannel *channel;
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memset (&input, 0, sizeof (input));
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input.index = n;
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if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_ENUMINPUT, &input) < 0) {
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if (errno == EINVAL || errno == ENOTTY)
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break; /* end of enumeration */
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else {
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GST_ELEMENT_ERROR (e, RESOURCE, SETTINGS,
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(_("Failed to query attributes of input %d in device %s"),
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n, v4l2object->videodev),
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("Failed to get %d in input enumeration for %s. (%d - %s)",
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n, v4l2object->videodev, errno, strerror (errno)));
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return FALSE;
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}
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}
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GST_LOG_OBJECT (e, " index: %d", input.index);
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GST_LOG_OBJECT (e, " name: '%s'", input.name);
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GST_LOG_OBJECT (e, " type: %08x", input.type);
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GST_LOG_OBJECT (e, " audioset: %08x", input.audioset);
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GST_LOG_OBJECT (e, " std: %016" G_GINT64_MODIFIER "x",
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(guint64) input.std);
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GST_LOG_OBJECT (e, " status: %08x", input.status);
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v4l2channel = g_object_new (GST_TYPE_V4L2_TUNER_CHANNEL, NULL);
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channel = GST_TUNER_CHANNEL (v4l2channel);
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channel->label = g_strdup ((const gchar *) input.name);
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channel->flags = GST_TUNER_CHANNEL_INPUT;
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v4l2channel->index = n;
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if (input.type == V4L2_INPUT_TYPE_TUNER) {
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struct v4l2_tuner vtun;
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v4l2channel->tuner = input.tuner;
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channel->flags |= GST_TUNER_CHANNEL_FREQUENCY;
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vtun.index = input.tuner;
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if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_TUNER, &vtun) < 0) {
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GST_ELEMENT_ERROR (e, RESOURCE, SETTINGS,
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(_("Failed to get setting of tuner %d on device '%s'."),
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input.tuner, v4l2object->videodev), GST_ERROR_SYSTEM);
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g_object_unref (G_OBJECT (channel));
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return FALSE;
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}
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channel->freq_multiplicator =
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62.5 * ((vtun.capability & V4L2_TUNER_CAP_LOW) ? 1 : 1000);
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channel->min_frequency = vtun.rangelow * channel->freq_multiplicator;
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channel->max_frequency = vtun.rangehigh * channel->freq_multiplicator;
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channel->min_signal = 0;
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channel->max_signal = 0xffff;
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}
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if (input.audioset) {
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/* we take the first. We don't care for
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* the others for now */
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while (!(input.audioset & (1 << v4l2channel->audio)))
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v4l2channel->audio++;
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channel->flags |= GST_TUNER_CHANNEL_AUDIO;
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}
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v4l2object->channels =
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g_list_prepend (v4l2object->channels, (gpointer) channel);
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}
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v4l2object->channels = g_list_reverse (v4l2object->channels);
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GST_DEBUG_OBJECT (e, " norms");
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/* norms... */
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for (n = 0;; n++) {
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struct v4l2_standard standard = { 0, };
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GstV4l2TunerNorm *v4l2norm;
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GstTunerNorm *norm;
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/* fill in defaults */
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standard.frameperiod.numerator = 1;
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standard.frameperiod.denominator = 0;
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standard.index = n;
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if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_ENUMSTD, &standard) < 0) {
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if (errno == EINVAL || errno == ENOTTY)
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break; /* end of enumeration */
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#ifdef ENODATA
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else if (errno == ENODATA)
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break; /* end of enumeration, as of Linux 3.7-rc1 */
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#endif
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else {
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GST_ELEMENT_ERROR (e, RESOURCE, SETTINGS,
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(_("Failed to query norm on device '%s'."),
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v4l2object->videodev),
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("Failed to get attributes for norm %d on divide '%s'. (%d - %s)",
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n, v4l2object->videodev, errno, strerror (errno)));
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return FALSE;
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}
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}
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GST_DEBUG_OBJECT (e, " '%s', fps: %d / %d",
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standard.name, standard.frameperiod.denominator,
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standard.frameperiod.numerator);
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v4l2norm = g_object_new (GST_TYPE_V4L2_TUNER_NORM, NULL);
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norm = GST_TUNER_NORM (v4l2norm);
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norm->label = g_strdup ((const gchar *) standard.name);
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gst_value_set_fraction (&norm->framerate,
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standard.frameperiod.denominator, standard.frameperiod.numerator);
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v4l2norm->index = standard.id;
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GST_DEBUG_OBJECT (v4l2object->dbg_obj, "index=%08x, label=%s",
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(unsigned int) v4l2norm->index, norm->label);
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v4l2object->norms = g_list_prepend (v4l2object->norms, (gpointer) norm);
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}
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v4l2object->norms = g_list_reverse (v4l2object->norms);
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GST_DEBUG_OBJECT (e, " controls+menus");
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/* and lastly, controls+menus (if appropriate) */
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next = V4L2_CTRL_FLAG_NEXT_CTRL;
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n = 0;
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control.id = next;
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while (TRUE) {
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GstV4l2ColorBalanceChannel *v4l2channel;
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GstColorBalanceChannel *channel;
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if (!next)
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n++;
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retry:
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/* when we reached the last official CID, continue with private CIDs */
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if (n == V4L2_CID_LASTP1) {
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GST_DEBUG_OBJECT (e, "checking private CIDs");
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n = V4L2_CID_PRIVATE_BASE;
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}
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GST_DEBUG_OBJECT (e, "checking control %08x", n);
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control.id = n | next;
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if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_QUERYCTRL,
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&control) < 0) {
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if (next) {
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if (n > 0) {
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GST_DEBUG_OBJECT (e, "controls finished");
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break;
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} else {
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GST_DEBUG_OBJECT (e, "V4L2_CTRL_FLAG_NEXT_CTRL not supported.");
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next = 0;
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n = V4L2_CID_BASE;
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goto retry;
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}
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}
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if (errno == EINVAL || errno == ENOTTY || errno == EIO || errno == ENOENT) {
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if (n < V4L2_CID_PRIVATE_BASE) {
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GST_DEBUG_OBJECT (e, "skipping control %08x", n);
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/* continue so that we also check private controls */
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n = V4L2_CID_PRIVATE_BASE - 1;
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continue;
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} else {
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GST_DEBUG_OBJECT (e, "controls finished");
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break;
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}
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} else {
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GST_WARNING_OBJECT (e, "Failed querying control %d on device '%s'. "
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"(%d - %s)", n, v4l2object->videodev, errno, strerror (errno));
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continue;
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}
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}
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/* bogus driver might mess with id in unexpected ways (e.g. set to 0), so
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* make sure to simply try all if V4L2_CTRL_FLAG_NEXT_CTRL not supported */
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if (next)
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n = control.id;
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if (control.flags & V4L2_CTRL_FLAG_DISABLED) {
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GST_DEBUG_OBJECT (e, "skipping disabled control");
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continue;
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}
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if (control.type == V4L2_CTRL_TYPE_CTRL_CLASS) {
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GST_DEBUG_OBJECT (e, "starting control class '%s'", control.name);
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continue;
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}
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switch (control.type) {
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case V4L2_CTRL_TYPE_INTEGER:
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case V4L2_CTRL_TYPE_BOOLEAN:
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case V4L2_CTRL_TYPE_MENU:
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case V4L2_CTRL_TYPE_INTEGER_MENU:
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case V4L2_CTRL_TYPE_BITMASK:
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case V4L2_CTRL_TYPE_BUTTON:
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case V4L2_CTRL_TYPE_STRING:{
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control.name[31] = '\0';
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gst_v4l2_normalise_control_name ((gchar *) control.name);
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g_datalist_id_set_data (&v4l2object->controls,
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g_quark_from_string ((const gchar *) control.name),
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GINT_TO_POINTER (n));
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break;
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}
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default:
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GST_DEBUG_OBJECT (e,
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"Control type for '%s' not supported for extra controls.",
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control.name);
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break;
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}
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switch (n) {
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case V4L2_CID_BRIGHTNESS:
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case V4L2_CID_CONTRAST:
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case V4L2_CID_SATURATION:
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case V4L2_CID_HUE:
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case V4L2_CID_BLACK_LEVEL:
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case V4L2_CID_AUTO_WHITE_BALANCE:
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case V4L2_CID_DO_WHITE_BALANCE:
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case V4L2_CID_RED_BALANCE:
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case V4L2_CID_BLUE_BALANCE:
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case V4L2_CID_GAMMA:
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case V4L2_CID_EXPOSURE:
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case V4L2_CID_AUTOGAIN:
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case V4L2_CID_GAIN:
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case V4L2_CID_SHARPNESS:
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/* we only handle these for now (why?) */
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break;
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case V4L2_CID_HFLIP:
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case V4L2_CID_VFLIP:
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case V4L2_CID_PAN_RESET:
|
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case V4L2_CID_TILT_RESET:
|
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/* not handled here, handled by VideoOrientation interface */
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control.id++;
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break;
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case V4L2_CID_AUDIO_VOLUME:
|
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case V4L2_CID_AUDIO_BALANCE:
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case V4L2_CID_AUDIO_BASS:
|
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case V4L2_CID_AUDIO_TREBLE:
|
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case V4L2_CID_AUDIO_MUTE:
|
|
case V4L2_CID_AUDIO_LOUDNESS:
|
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/* FIXME: We should implement GstMixer interface instead */
|
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/* but let's not be pedantic and make element more useful for now */
|
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break;
|
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case V4L2_CID_ALPHA_COMPONENT:
|
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v4l2object->has_alpha_component = TRUE;
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break;
|
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default:
|
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GST_DEBUG_OBJECT (e,
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"ControlID %s (%x) unhandled, FIXME", control.name, n);
|
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control.id++;
|
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break;
|
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}
|
|
if (n != control.id)
|
|
continue;
|
|
|
|
GST_DEBUG_OBJECT (e, "Adding ControlID %s (%x)", control.name, n);
|
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v4l2channel = g_object_new (GST_TYPE_V4L2_COLOR_BALANCE_CHANNEL, NULL);
|
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channel = GST_COLOR_BALANCE_CHANNEL (v4l2channel);
|
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channel->label = g_strdup ((const gchar *) control.name);
|
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v4l2channel->id = n;
|
|
|
|
#if 0
|
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/* FIXME: it will be need just when handling private controls
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*(currently none of base controls are of this type) */
|
|
if (control.type == V4L2_CTRL_TYPE_MENU) {
|
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struct v4l2_querymenu menu, *mptr;
|
|
|
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int i;
|
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|
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menu.id = n;
|
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for (i = 0;; i++) {
|
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menu.index = i;
|
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if (v4l2object->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));
|
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menus = g_list_append (menus, mptr);
|
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}
|
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}
|
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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->dbg_obj, "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;
|
|
|
|
g_datalist_clear (&v4l2object->controls);
|
|
}
|
|
|
|
static void
|
|
gst_v4l2_adjust_buf_type (GstV4l2Object * v4l2object)
|
|
{
|
|
/* when calling gst_v4l2_object_new the user decides the initial type
|
|
* so adjust it if multi-planar is supported
|
|
* the driver should make it exclusive. So the driver should
|
|
* not support both MPLANE and non-PLANE.
|
|
* Because even when using MPLANE it still possibles to use it
|
|
* in a contiguous manner. In this case the first v4l2 plane
|
|
* contains all the gst planes.
|
|
*/
|
|
switch (v4l2object->type) {
|
|
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
|
|
if (v4l2object->device_caps &
|
|
(V4L2_CAP_VIDEO_OUTPUT_MPLANE | V4L2_CAP_VIDEO_M2M_MPLANE)) {
|
|
GST_DEBUG ("adjust type to multi-planar output");
|
|
v4l2object->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
|
|
}
|
|
break;
|
|
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
|
|
if (v4l2object->device_caps &
|
|
(V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_VIDEO_M2M_MPLANE)) {
|
|
GST_DEBUG ("adjust type to multi-planar capture");
|
|
v4l2object->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
/******************************************************
|
|
* gst_v4l2_open():
|
|
* open the video device (v4l2object->videodev)
|
|
* return value: TRUE on success, FALSE on error
|
|
******************************************************/
|
|
gboolean
|
|
gst_v4l2_open (GstV4l2Object * v4l2object, GstV4l2Error * error)
|
|
{
|
|
struct stat st;
|
|
int libv4l2_fd = -1;
|
|
|
|
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "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;
|
|
|
|
#ifdef HAVE_LIBV4L2
|
|
if (v4l2object->fd_open)
|
|
libv4l2_fd = v4l2object->fd_open (v4l2object->video_fd,
|
|
V4L2_ENABLE_ENUM_FMT_EMULATION);
|
|
#endif
|
|
|
|
/* 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->element) &&
|
|
!(v4l2object->device_caps & (V4L2_CAP_VIDEO_CAPTURE |
|
|
V4L2_CAP_VIDEO_CAPTURE_MPLANE)))
|
|
goto not_capture;
|
|
|
|
if (GST_IS_V4L2SINK (v4l2object->element) &&
|
|
!(v4l2object->device_caps & (V4L2_CAP_VIDEO_OUTPUT |
|
|
V4L2_CAP_VIDEO_OUTPUT_MPLANE)))
|
|
goto not_output;
|
|
|
|
if (GST_IS_V4L2_VIDEO_DEC (v4l2object->element) &&
|
|
!GST_V4L2_IS_M2M (v4l2object->device_caps))
|
|
goto not_m2m;
|
|
|
|
gst_v4l2_adjust_buf_type (v4l2object);
|
|
|
|
/* create enumerations, posts errors. */
|
|
if (!gst_v4l2_fill_lists (v4l2object))
|
|
goto error;
|
|
|
|
GST_INFO_OBJECT (v4l2object->dbg_obj,
|
|
"Opened device '%s' (%s) successfully",
|
|
v4l2object->vcap.card, v4l2object->videodev);
|
|
|
|
if (v4l2object->extra_controls)
|
|
gst_v4l2_set_controls (v4l2object, v4l2object->extra_controls);
|
|
|
|
/* UVC devices are never interlaced, and doing VIDIOC_TRY_FMT on them
|
|
* causes expensive and slow USB IO, so don't probe them for interlaced
|
|
*/
|
|
if (!strcmp ((char *) v4l2object->vcap.driver, "uvcusb") ||
|
|
!strcmp ((char *) v4l2object->vcap.driver, "uvcvideo")) {
|
|
v4l2object->never_interlaced = TRUE;
|
|
}
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
stat_failed:
|
|
{
|
|
GST_V4L2_ERROR (error, RESOURCE, NOT_FOUND,
|
|
(_("Cannot identify device '%s'."), v4l2object->videodev),
|
|
GST_ERROR_SYSTEM);
|
|
goto error;
|
|
}
|
|
no_device:
|
|
{
|
|
GST_V4L2_ERROR (error, RESOURCE, NOT_FOUND,
|
|
(_("This isn't a device '%s'."), v4l2object->videodev),
|
|
GST_ERROR_SYSTEM);
|
|
goto error;
|
|
}
|
|
not_open:
|
|
{
|
|
GST_V4L2_ERROR (error, RESOURCE, OPEN_READ_WRITE,
|
|
(_("Could not open device '%s' for reading and writing."),
|
|
v4l2object->videodev), GST_ERROR_SYSTEM);
|
|
goto error;
|
|
}
|
|
not_capture:
|
|
{
|
|
GST_V4L2_ERROR (error, RESOURCE, NOT_FOUND,
|
|
(_("Device '%s' is not a capture device."), v4l2object->videodev),
|
|
("Capabilities: 0x%x", v4l2object->device_caps));
|
|
goto error;
|
|
}
|
|
not_output:
|
|
{
|
|
GST_V4L2_ERROR (error, RESOURCE, NOT_FOUND,
|
|
(_("Device '%s' is not a output device."), v4l2object->videodev),
|
|
("Capabilities: 0x%x", v4l2object->device_caps));
|
|
goto error;
|
|
}
|
|
not_m2m:
|
|
{
|
|
GST_V4L2_ERROR (error, RESOURCE, NOT_FOUND,
|
|
(_("Device '%s' is not a M2M device."), v4l2object->videodev),
|
|
("Capabilities: 0x%x", v4l2object->device_caps));
|
|
goto error;
|
|
}
|
|
error:
|
|
{
|
|
if (GST_V4L2_IS_OPEN (v4l2object)) {
|
|
/* close device */
|
|
v4l2object->close (v4l2object->video_fd);
|
|
v4l2object->video_fd = -1;
|
|
}
|
|
/* empty lists */
|
|
gst_v4l2_empty_lists (v4l2object);
|
|
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
gboolean
|
|
gst_v4l2_dup (GstV4l2Object * v4l2object, GstV4l2Object * other)
|
|
{
|
|
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Trying to dup device %s",
|
|
other->videodev);
|
|
|
|
GST_V4L2_CHECK_OPEN (other);
|
|
GST_V4L2_CHECK_NOT_OPEN (v4l2object);
|
|
GST_V4L2_CHECK_NOT_ACTIVE (other);
|
|
GST_V4L2_CHECK_NOT_ACTIVE (v4l2object);
|
|
|
|
v4l2object->vcap = other->vcap;
|
|
v4l2object->device_caps = other->device_caps;
|
|
gst_v4l2_adjust_buf_type (v4l2object);
|
|
|
|
v4l2object->video_fd = v4l2object->dup (other->video_fd);
|
|
if (!GST_V4L2_IS_OPEN (v4l2object))
|
|
goto not_open;
|
|
|
|
g_free (v4l2object->videodev);
|
|
v4l2object->videodev = g_strdup (other->videodev);
|
|
|
|
GST_INFO_OBJECT (v4l2object->dbg_obj,
|
|
"Cloned device '%s' (%s) successfully",
|
|
v4l2object->vcap.card, v4l2object->videodev);
|
|
|
|
v4l2object->never_interlaced = other->never_interlaced;
|
|
v4l2object->no_initial_format = other->no_initial_format;
|
|
|
|
return TRUE;
|
|
|
|
not_open:
|
|
{
|
|
GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, OPEN_READ_WRITE,
|
|
(_("Could not dup device '%s' for reading and writing."),
|
|
v4l2object->videodev), GST_ERROR_SYSTEM);
|
|
|
|
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)
|
|
{
|
|
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Trying to close %s",
|
|
v4l2object->videodev);
|
|
|
|
GST_V4L2_CHECK_OPEN (v4l2object);
|
|
GST_V4L2_CHECK_NOT_ACTIVE (v4l2object);
|
|
|
|
/* close device */
|
|
v4l2object->close (v4l2object->video_fd);
|
|
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->dbg_obj, "getting norm");
|
|
|
|
if (!GST_V4L2_IS_OPEN (v4l2object))
|
|
return FALSE;
|
|
|
|
if (v4l2object->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->dbg_obj, "trying to set norm to "
|
|
"%" G_GINT64_MODIFIER "x", (guint64) norm);
|
|
|
|
if (!GST_V4L2_IS_OPEN (v4l2object))
|
|
return FALSE;
|
|
|
|
if (v4l2object->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 = { 0, };
|
|
|
|
GstTunerChannel *channel;
|
|
|
|
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "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 (v4l2object->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 = { 0, };
|
|
|
|
GstTunerChannel *channel;
|
|
|
|
GST_DEBUG_OBJECT (v4l2object->dbg_obj,
|
|
"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 */
|
|
(void) v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_FREQUENCY, &freq);
|
|
freq.frequency = frequency / channel->freq_multiplicator;
|
|
|
|
if (v4l2object->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 = { 0, };
|
|
|
|
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "trying to get signal strength");
|
|
|
|
if (!GST_V4L2_IS_OPEN (v4l2object))
|
|
return FALSE;
|
|
|
|
tuner.index = tunernum;
|
|
if (v4l2object->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 = { 0, };
|
|
|
|
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "getting value of attribute %d",
|
|
attribute_num);
|
|
|
|
if (!GST_V4L2_IS_OPEN (v4l2object))
|
|
return FALSE;
|
|
|
|
control.id = attribute_num;
|
|
|
|
if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_CTRL, &control) < 0)
|
|
goto ctrl_failed;
|
|
|
|
*value = control.value;
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
ctrl_failed:
|
|
{
|
|
GST_WARNING_OBJECT (v4l2object,
|
|
_("Failed to get value for control %d on device '%s'."),
|
|
attribute_num, v4l2object->videodev);
|
|
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 = { 0, };
|
|
|
|
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "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 (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_S_CTRL, &control) < 0)
|
|
goto ctrl_failed;
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
ctrl_failed:
|
|
{
|
|
GST_WARNING_OBJECT (v4l2object,
|
|
_("Failed to set value %d for control %d on device '%s'."),
|
|
value, attribute_num, v4l2object->videodev);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/******************************************************
|
|
* gst_v4l2_set_string_attribute():
|
|
* try to set the string value of one specific attribute
|
|
* return value: TRUE on success, FALSE on error
|
|
******************************************************/
|
|
gboolean
|
|
gst_v4l2_set_string_attribute (GstV4l2Object * v4l2object,
|
|
int attribute_num, const char *value)
|
|
{
|
|
struct v4l2_ext_controls ctrls = { {0}, 1 };
|
|
struct v4l2_ext_control ctrl;
|
|
struct v4l2_queryctrl control = { 0, };
|
|
|
|
if (!GST_V4L2_IS_OPEN (v4l2object))
|
|
return FALSE;
|
|
|
|
control.id = attribute_num;
|
|
if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_QUERYCTRL, &control) < 0) {
|
|
GST_WARNING_OBJECT (v4l2object,
|
|
"Failed to find control %d on device '%s'.",
|
|
attribute_num, v4l2object->videodev);
|
|
return TRUE;
|
|
}
|
|
|
|
if (control.type != V4L2_CTRL_TYPE_STRING) {
|
|
GST_WARNING_OBJECT (v4l2object,
|
|
"control %d is not string type on device '%s'.",
|
|
attribute_num, v4l2object->videodev);
|
|
return TRUE;
|
|
}
|
|
|
|
ctrl.id = attribute_num;
|
|
ctrl.size = strlen (value) + 1;
|
|
ctrl.string = g_malloc (ctrl.size);
|
|
strcpy (ctrl.string, value);
|
|
|
|
ctrls.which = V4L2_CTRL_ID2WHICH (attribute_num);
|
|
ctrls.count = 1;
|
|
ctrls.controls = &ctrl;
|
|
|
|
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "setting value of attribute %d to %s",
|
|
attribute_num, value);
|
|
|
|
if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_S_EXT_CTRLS, &ctrls) < 0)
|
|
goto ctrl_failed;
|
|
|
|
g_free (ctrl.string);
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
ctrl_failed:
|
|
{
|
|
GST_WARNING_OBJECT (v4l2object,
|
|
_("Failed to set value %s for control %d on device '%s'."),
|
|
value, attribute_num, v4l2object->videodev);
|
|
g_free (ctrl.string);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
set_control (GQuark field_id, const GValue * value, gpointer user_data)
|
|
{
|
|
GstV4l2Object *v4l2object = user_data;
|
|
GQuark normalised_field_id;
|
|
gpointer *d;
|
|
|
|
/* 32 bytes is the maximum size for a control name according to v4l2 */
|
|
gchar name[32];
|
|
|
|
/* Backwards compatibility: in the past GStreamer would normalise strings in
|
|
a subtly different way to v4l2-ctl. e.g. the kernel's "Focus (absolute)"
|
|
would become "focus__absolute_" whereas now it becomes "focus_absolute".
|
|
Please remove the following in GStreamer 1.5 for 1.6 */
|
|
strncpy (name, g_quark_to_string (field_id), sizeof (name));
|
|
name[31] = '\0';
|
|
gst_v4l2_normalise_control_name (name);
|
|
normalised_field_id = g_quark_from_string (name);
|
|
if (normalised_field_id != field_id)
|
|
g_warning ("In GStreamer 1.4 the way V4L2 control names were normalised "
|
|
"changed. Instead of setting \"%s\" please use \"%s\". The former is "
|
|
"deprecated and will be removed in a future version of GStreamer",
|
|
g_quark_to_string (field_id), name);
|
|
field_id = normalised_field_id;
|
|
|
|
d = g_datalist_id_get_data (&v4l2object->controls, field_id);
|
|
if (!d) {
|
|
GST_WARNING_OBJECT (v4l2object,
|
|
"Control '%s' does not exist or has an unsupported type.",
|
|
g_quark_to_string (field_id));
|
|
return TRUE;
|
|
}
|
|
if (G_VALUE_HOLDS (value, G_TYPE_INT)) {
|
|
gst_v4l2_set_attribute (v4l2object, GPOINTER_TO_INT (d),
|
|
g_value_get_int (value));
|
|
} else if (G_VALUE_HOLDS (value, G_TYPE_STRING)) {
|
|
gst_v4l2_set_string_attribute (v4l2object, GPOINTER_TO_INT (d),
|
|
g_value_get_string (value));
|
|
} else {
|
|
GST_WARNING_OBJECT (v4l2object,
|
|
"no compatible value expected for control '%s'.",
|
|
g_quark_to_string (field_id));
|
|
return TRUE;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
gboolean
|
|
gst_v4l2_set_controls (GstV4l2Object * v4l2object, GstStructure * controls)
|
|
{
|
|
return gst_structure_foreach (controls, set_control, v4l2object);
|
|
}
|
|
|
|
gboolean
|
|
gst_v4l2_get_input (GstV4l2Object * v4l2object, guint32 * input)
|
|
{
|
|
guint32 n;
|
|
|
|
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "trying to get input");
|
|
|
|
if (!GST_V4L2_IS_OPEN (v4l2object))
|
|
return FALSE;
|
|
|
|
if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_INPUT, &n) < 0)
|
|
goto input_failed;
|
|
|
|
*input = n;
|
|
|
|
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "input: %u", n);
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
input_failed:
|
|
if (v4l2object->device_caps & V4L2_CAP_TUNER) {
|
|
/* only give a warning message if driver actually claims to have tuner
|
|
* support
|
|
*/
|
|
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, guint32 input)
|
|
{
|
|
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "trying to set input to %u", input);
|
|
|
|
if (!GST_V4L2_IS_OPEN (v4l2object))
|
|
return FALSE;
|
|
|
|
if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_S_INPUT, &input) < 0)
|
|
goto input_failed;
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
input_failed:
|
|
if (v4l2object->device_caps & V4L2_CAP_TUNER) {
|
|
/* only give a warning message if driver actually claims to have tuner
|
|
* support
|
|
*/
|
|
GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS,
|
|
(_("Failed to set input %u on device %s."),
|
|
input, v4l2object->videodev), GST_ERROR_SYSTEM);
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
gboolean
|
|
gst_v4l2_query_input (GstV4l2Object * obj, struct v4l2_input * input)
|
|
{
|
|
gint ret;
|
|
|
|
ret = obj->ioctl (obj->video_fd, VIDIOC_ENUMINPUT, input);
|
|
if (ret < 0) {
|
|
GST_WARNING_OBJECT (obj->dbg_obj, "Failed to read input state: %s (%i)",
|
|
g_strerror (errno), errno);
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
gboolean
|
|
gst_v4l2_get_output (GstV4l2Object * v4l2object, guint32 * output)
|
|
{
|
|
guint32 n;
|
|
|
|
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "trying to get output");
|
|
|
|
if (!GST_V4L2_IS_OPEN (v4l2object))
|
|
return FALSE;
|
|
|
|
if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_OUTPUT, &n) < 0)
|
|
goto output_failed;
|
|
|
|
*output = n;
|
|
|
|
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "output: %u", n);
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
output_failed:
|
|
if (v4l2object->device_caps & V4L2_CAP_TUNER) {
|
|
/* only give a warning message if driver actually claims to have tuner
|
|
* support
|
|
*/
|
|
GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS,
|
|
(_("Failed to get current output on device '%s'. May be it is a radio device"), v4l2object->videodev), GST_ERROR_SYSTEM);
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
gboolean
|
|
gst_v4l2_set_output (GstV4l2Object * v4l2object, guint32 output)
|
|
{
|
|
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "trying to set output to %u", output);
|
|
|
|
if (!GST_V4L2_IS_OPEN (v4l2object))
|
|
return FALSE;
|
|
|
|
if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_S_OUTPUT, &output) < 0)
|
|
goto output_failed;
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
output_failed:
|
|
if (v4l2object->device_caps & V4L2_CAP_TUNER) {
|
|
/* only give a warning message if driver actually claims to have tuner
|
|
* support
|
|
*/
|
|
GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS,
|
|
(_("Failed to set output %u on device %s."),
|
|
output, v4l2object->videodev), GST_ERROR_SYSTEM);
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
static const gchar *
|
|
gst_v4l2_event_to_string (guint32 event)
|
|
{
|
|
switch (event) {
|
|
case V4L2_EVENT_ALL:
|
|
return "ALL";
|
|
case V4L2_EVENT_VSYNC:
|
|
return "VSYNC";
|
|
case V4L2_EVENT_EOS:
|
|
return "EOS";
|
|
case V4L2_EVENT_CTRL:
|
|
return "CTRL";
|
|
case V4L2_EVENT_FRAME_SYNC:
|
|
return "FRAME_SYNC";
|
|
case V4L2_EVENT_SOURCE_CHANGE:
|
|
return "SOURCE_CHANGE";
|
|
case V4L2_EVENT_MOTION_DET:
|
|
return "MOTION_DET";
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return "UNKNOWN";
|
|
}
|
|
|
|
gboolean
|
|
gst_v4l2_subscribe_event (GstV4l2Object * v4l2object, guint32 event, guint32 id)
|
|
{
|
|
struct v4l2_event_subscription sub = {.type = event,.id = id, };
|
|
gint ret;
|
|
|
|
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Subscribing to '%s' event",
|
|
gst_v4l2_event_to_string (event));
|
|
|
|
if (!GST_V4L2_IS_OPEN (v4l2object))
|
|
return FALSE;
|
|
|
|
ret = v4l2object->ioctl (v4l2object->video_fd, VIDIOC_SUBSCRIBE_EVENT, &sub);
|
|
if (ret < 0)
|
|
goto failed;
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
failed:
|
|
{
|
|
if (errno == ENOTTY || errno == EINVAL) {
|
|
GST_DEBUG_OBJECT (v4l2object->dbg_obj,
|
|
"Cannot subscribe to '%s' event: %s",
|
|
gst_v4l2_event_to_string (event), "not supported");
|
|
} else {
|
|
GST_ERROR_OBJECT (v4l2object->dbg_obj,
|
|
"Cannot subscribe to '%s' event: %s",
|
|
gst_v4l2_event_to_string (event), g_strerror (errno));
|
|
}
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
gboolean
|
|
gst_v4l2_dequeue_event (GstV4l2Object * v4l2object, struct v4l2_event * event)
|
|
{
|
|
gint ret;
|
|
|
|
if (!GST_V4L2_IS_OPEN (v4l2object))
|
|
return FALSE;
|
|
|
|
ret = v4l2object->ioctl (v4l2object->video_fd, VIDIOC_DQEVENT, event);
|
|
|
|
if (ret < 0) {
|
|
GST_ERROR_OBJECT (v4l2object->dbg_obj, "DQEVENT failed: %s",
|
|
g_strerror (errno));
|
|
return FALSE;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Dequeued a '%s' event.",
|
|
gst_v4l2_event_to_string (event->type));
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
gboolean
|
|
gst_v4l2_set_dv_timings (GstV4l2Object * v4l2object,
|
|
struct v4l2_dv_timings * timings)
|
|
{
|
|
gint ret;
|
|
|
|
if (!GST_V4L2_IS_OPEN (v4l2object))
|
|
return FALSE;
|
|
|
|
ret = v4l2object->ioctl (v4l2object->video_fd, VIDIOC_S_DV_TIMINGS, timings);
|
|
|
|
if (ret < 0) {
|
|
GST_ERROR_OBJECT (v4l2object->dbg_obj, "S_DV_TIMINGS failed: %s (%i)",
|
|
g_strerror (errno), errno);
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
gboolean
|
|
gst_v4l2_query_dv_timings (GstV4l2Object * v4l2object,
|
|
struct v4l2_dv_timings * timings)
|
|
{
|
|
gint ret;
|
|
|
|
if (!GST_V4L2_IS_OPEN (v4l2object))
|
|
return FALSE;
|
|
|
|
ret = v4l2object->ioctl (v4l2object->video_fd, VIDIOC_QUERY_DV_TIMINGS,
|
|
timings);
|
|
|
|
if (ret < 0) {
|
|
switch (errno) {
|
|
case ENODATA:
|
|
GST_DEBUG_OBJECT (v4l2object->dbg_obj,
|
|
"QUERY_DV_TIMINGS not supported for this input/output");
|
|
break;
|
|
case ENOLINK:
|
|
GST_DEBUG_OBJECT (v4l2object->dbg_obj,
|
|
"No timings could be detected because no signal was found.");
|
|
break;
|
|
case ENOLCK:
|
|
GST_INFO_OBJECT (v4l2object->dbg_obj,
|
|
"The signal was unstable and the hardware could not lock on to it.");
|
|
break;
|
|
case ERANGE:
|
|
GST_INFO_OBJECT (v4l2object->dbg_obj,
|
|
"Timings were found, but they are out of range of the hardware capabilities.");
|
|
break;
|
|
default:
|
|
GST_ERROR_OBJECT (v4l2object->dbg_obj,
|
|
"QUERY_DV_TIMINGS failed: %s (%i)", g_strerror (errno), errno);
|
|
break;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
if (timings->type != V4L2_DV_BT_656_1120) {
|
|
GST_FIXME_OBJECT (v4l2object->dbg_obj, "Unsupported DV Timings type (%i)",
|
|
timings->type);
|
|
return FALSE;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Detected DV Timings (%i x %i)",
|
|
timings->bt.width, timings->bt.height);
|
|
|
|
return TRUE;
|
|
}
|