mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-19 14:56:36 +00:00
1968 lines
56 KiB
C
1968 lines
56 KiB
C
/* GStreamer
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*
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* Copyright (C) 2001-2002 Ronald Bultje <rbultje@ronald.bitfreak.net>
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* 2006 Edgard Lima <edgard.lima@indt.org.br>
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*
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* gstv4l2object.c: base class for V4L2 elements
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*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Library General Public License as published
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* by the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version. This library is distributed in the hope
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* that it will be useful, but WITHOUT ANY WARRANTY; without even the
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* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU Library General Public License for more details.
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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 Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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* 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/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <unistd.h>
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#include <string.h>
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#ifdef HAVE_GUDEV
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#include <gudev/gudev.h>
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#endif
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#include "v4l2_calls.h"
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#include "gstv4l2tuner.h"
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#if 0 /* overlay is still not implemented #ifdef HAVE_XVIDEO */
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#include "gstv4l2xoverlay.h"
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#endif
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#include "gstv4l2colorbalance.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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#define DEFAULT_PROP_DEVICE_NAME NULL
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#define DEFAULT_PROP_DEVICE_FD -1
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#define DEFAULT_PROP_FLAGS 0
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#define DEFAULT_PROP_NORM NULL
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#define DEFAULT_PROP_CHANNEL NULL
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#define DEFAULT_PROP_FREQUENCY 0
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enum
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{
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PROP_0,
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V4L2_STD_OBJECT_PROPS,
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};
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const GList *
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gst_v4l2_probe_get_properties (GstPropertyProbe * probe)
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{
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GObjectClass *klass = G_OBJECT_GET_CLASS (probe);
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static GList *list = NULL;
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/* well, not perfect, but better than no locking at all.
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* In the worst case we leak a list node, so who cares? */
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GST_CLASS_LOCK (GST_OBJECT_CLASS (klass));
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if (!list) {
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list = g_list_append (NULL, g_object_class_find_property (klass, "device"));
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}
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GST_CLASS_UNLOCK (GST_OBJECT_CLASS (klass));
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return list;
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}
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static gboolean init = FALSE;
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static GList *devices = NULL;
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#ifdef HAVE_GUDEV
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static gboolean
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gst_v4l2_class_probe_devices_with_udev (GstElementClass * klass, gboolean check,
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GList ** klass_devices)
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{
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GUdevClient *client = NULL;
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GList *item;
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if (!check) {
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while (devices) {
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gchar *device = devices->data;
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devices = g_list_remove (devices, device);
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g_free (device);
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}
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GST_INFO ("Enumerating video4linux devices from udev");
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client = g_udev_client_new (NULL);
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if (!client) {
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GST_WARNING ("Failed to initialize gudev client");
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goto finish;
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}
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item = g_udev_client_query_by_subsystem (client, "video4linux");
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while (item) {
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GUdevDevice *device = item->data;
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gchar *devnode = g_strdup (g_udev_device_get_device_file (device));
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gint api = g_udev_device_get_property_as_int (device, "ID_V4L_VERSION");
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GST_INFO ("Found new device: %s, API: %d", devnode, api);
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/* Append v4l2 devices only. If api is 0 probably v4l_id has
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been stripped out of the current udev installation, append
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anyway */
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if (api == 0) {
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GST_WARNING
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("Couldn't retrieve ID_V4L_VERSION, silly udev installation?");
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}
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if ((api == 2 || api == 0)) {
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devices = g_list_append (devices, devnode);
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} else {
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g_free (devnode);
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}
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g_object_unref (device);
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item = item->next;
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}
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g_list_free (item);
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init = TRUE;
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}
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finish:
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if (client) {
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g_object_unref (client);
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}
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*klass_devices = devices;
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return init;
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}
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#endif /* HAVE_GUDEV */
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static gboolean
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gst_v4l2_class_probe_devices (GstElementClass * klass, gboolean check,
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GList ** klass_devices)
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{
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if (!check) {
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const gchar *dev_base[] = { "/dev/video", "/dev/v4l2/video", NULL };
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gint base, n, fd;
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while (devices) {
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gchar *device = devices->data;
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devices = g_list_remove (devices, device);
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g_free (device);
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}
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/*
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* detect /dev entries
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*/
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for (n = 0; n < 64; n++) {
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for (base = 0; dev_base[base] != NULL; base++) {
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struct stat s;
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gchar *device = g_strdup_printf ("%s%d",
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dev_base[base],
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n);
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/*
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* does the /dev/ entry exist at all?
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*/
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if (stat (device, &s) == 0) {
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/*
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* yes: is a device attached?
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*/
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if (S_ISCHR (s.st_mode)) {
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if ((fd = open (device, O_RDWR | O_NONBLOCK)) > 0 || errno == EBUSY) {
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if (fd > 0)
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close (fd);
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devices = g_list_append (devices, device);
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break;
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}
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}
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}
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g_free (device);
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}
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}
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init = TRUE;
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}
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*klass_devices = devices;
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return init;
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}
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void
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gst_v4l2_probe_probe_property (GstPropertyProbe * probe,
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guint prop_id, const GParamSpec * pspec, GList ** klass_devices)
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{
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GstElementClass *klass = GST_ELEMENT_GET_CLASS (probe);
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switch (prop_id) {
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case PROP_DEVICE:
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#ifdef HAVE_GUDEV
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if (!gst_v4l2_class_probe_devices_with_udev (klass, FALSE, klass_devices))
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gst_v4l2_class_probe_devices (klass, FALSE, klass_devices);
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#else /* !HAVE_GUDEV */
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gst_v4l2_class_probe_devices (klass, FALSE, klass_devices);
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#endif /* HAVE_GUDEV */
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (probe, prop_id, pspec);
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break;
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}
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}
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gboolean
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gst_v4l2_probe_needs_probe (GstPropertyProbe * probe,
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guint prop_id, const GParamSpec * pspec, GList ** klass_devices)
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{
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GstElementClass *klass = GST_ELEMENT_GET_CLASS (probe);
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gboolean ret = FALSE;
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switch (prop_id) {
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case PROP_DEVICE:
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#ifdef HAVE_GUDEV
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ret =
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!gst_v4l2_class_probe_devices_with_udev (klass, FALSE, klass_devices);
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#else /* !HAVE_GUDEV */
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ret = !gst_v4l2_class_probe_devices (klass, TRUE, klass_devices);
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#endif /* HAVE_GUDEV */
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (probe, prop_id, pspec);
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break;
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}
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return ret;
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}
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static GValueArray *
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gst_v4l2_class_list_devices (GstElementClass * klass, GList ** klass_devices)
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{
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GValueArray *array;
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GValue value = { 0 };
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GList *item;
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if (!*klass_devices)
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return NULL;
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array = g_value_array_new (g_list_length (*klass_devices));
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item = *klass_devices;
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g_value_init (&value, G_TYPE_STRING);
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while (item) {
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gchar *device = item->data;
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g_value_set_string (&value, device);
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g_value_array_append (array, &value);
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item = item->next;
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}
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g_value_unset (&value);
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return array;
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}
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GValueArray *
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gst_v4l2_probe_get_values (GstPropertyProbe * probe,
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guint prop_id, const GParamSpec * pspec, GList ** klass_devices)
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{
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GstElementClass *klass = GST_ELEMENT_GET_CLASS (probe);
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GValueArray *array = NULL;
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switch (prop_id) {
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case PROP_DEVICE:
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array = gst_v4l2_class_list_devices (klass, klass_devices);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (probe, prop_id, pspec);
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break;
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}
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return array;
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}
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#define GST_TYPE_V4L2_DEVICE_FLAGS (gst_v4l2_device_get_type ())
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GType
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gst_v4l2_device_get_type (void)
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{
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static GType v4l2_device_type = 0;
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if (v4l2_device_type == 0) {
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static const GFlagsValue values[] = {
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{V4L2_CAP_VIDEO_CAPTURE, "Device supports video capture", "capture"},
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{V4L2_CAP_VIDEO_OUTPUT, "Device supports video playback", "output"},
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{V4L2_CAP_VIDEO_OVERLAY, "Device supports video overlay", "overlay"},
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{V4L2_CAP_VBI_CAPTURE, "Device supports the VBI capture", "vbi-capture"},
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{V4L2_CAP_VBI_OUTPUT, "Device supports the VBI output", "vbi-output"},
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{V4L2_CAP_TUNER, "Device has a tuner or modulator", "tuner"},
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{V4L2_CAP_AUDIO, "Device has audio inputs or outputs", "audio"},
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{0, NULL, NULL}
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};
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v4l2_device_type =
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g_flags_register_static ("GstV4l2DeviceTypeFlags", values);
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}
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return v4l2_device_type;
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}
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void
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gst_v4l2_object_install_properties_helper (GObjectClass * gobject_class,
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const char *default_device)
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{
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g_object_class_install_property (gobject_class, PROP_DEVICE,
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g_param_spec_string ("device", "Device", "Device location",
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default_device, G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class, PROP_DEVICE_NAME,
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g_param_spec_string ("device-name", "Device name",
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"Name of the device", DEFAULT_PROP_DEVICE_NAME, G_PARAM_READABLE));
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g_object_class_install_property (gobject_class, PROP_DEVICE_FD,
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g_param_spec_int ("device-fd", "File descriptor",
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"File descriptor of the device", -1, G_MAXINT, DEFAULT_PROP_DEVICE_FD,
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G_PARAM_READABLE));
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g_object_class_install_property (gobject_class, PROP_FLAGS,
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g_param_spec_flags ("flags", "Flags", "Device type flags",
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GST_TYPE_V4L2_DEVICE_FLAGS, DEFAULT_PROP_FLAGS, G_PARAM_READABLE));
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}
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GstV4l2Object *
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gst_v4l2_object_new (GstElement * element,
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enum v4l2_buf_type type,
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char *default_device,
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GstV4l2GetInOutFunction get_in_out_func,
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GstV4l2SetInOutFunction set_in_out_func,
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GstV4l2UpdateFpsFunction update_fps_func)
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{
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GstV4l2Object *v4l2object;
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/*
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* some default values
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*/
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v4l2object = g_new0 (GstV4l2Object, 1);
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v4l2object->type = type;
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v4l2object->formats = NULL;
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v4l2object->element = element;
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v4l2object->get_in_out_func = get_in_out_func;
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v4l2object->set_in_out_func = set_in_out_func;
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v4l2object->update_fps_func = update_fps_func;
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v4l2object->video_fd = -1;
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v4l2object->poll = gst_poll_new (TRUE);
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v4l2object->buffer = NULL;
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v4l2object->videodev = g_strdup (default_device);
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v4l2object->norms = NULL;
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v4l2object->channels = NULL;
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v4l2object->colors = NULL;
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v4l2object->xwindow_id = 0;
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return v4l2object;
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}
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static gboolean gst_v4l2_object_clear_format_list (GstV4l2Object * v4l2object);
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void
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gst_v4l2_object_destroy (GstV4l2Object * v4l2object)
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{
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g_return_if_fail (v4l2object != NULL);
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if (v4l2object->videodev)
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g_free (v4l2object->videodev);
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if (v4l2object->poll)
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gst_poll_free (v4l2object->poll);
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if (v4l2object->channel)
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g_free (v4l2object->channel);
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if (v4l2object->norm)
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g_free (v4l2object->norm);
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if (v4l2object->formats) {
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gst_v4l2_object_clear_format_list (v4l2object);
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}
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g_free (v4l2object);
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}
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static gboolean
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gst_v4l2_object_clear_format_list (GstV4l2Object * v4l2object)
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{
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g_slist_foreach (v4l2object->formats, (GFunc) g_free, NULL);
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g_slist_free (v4l2object->formats);
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v4l2object->formats = NULL;
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return TRUE;
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}
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gboolean
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gst_v4l2_object_set_property_helper (GstV4l2Object * v4l2object,
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guint prop_id, const GValue * value, GParamSpec * pspec)
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{
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switch (prop_id) {
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case PROP_DEVICE:
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g_free (v4l2object->videodev);
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v4l2object->videodev = g_value_dup_string (value);
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break;
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#if 0
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case PROP_NORM:
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if (GST_V4L2_IS_OPEN (v4l2object)) {
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GstTuner *tuner = GST_TUNER (v4l2object->element);
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GstTunerNorm *norm = gst_tuner_find_norm_by_name (tuner,
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(gchar *) g_value_get_string (value));
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if (norm) {
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/* like gst_tuner_set_norm (tuner, norm)
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without g_object_notify */
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gst_v4l2_tuner_set_norm (v4l2object, norm);
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}
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} else {
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g_free (v4l2object->norm);
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v4l2object->norm = g_value_dup_string (value);
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}
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break;
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case PROP_CHANNEL:
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if (GST_V4L2_IS_OPEN (v4l2object)) {
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GstTuner *tuner = GST_TUNER (v4l2object->element);
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GstTunerChannel *channel = gst_tuner_find_channel_by_name (tuner,
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(gchar *) g_value_get_string (value));
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if (channel) {
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/* like gst_tuner_set_channel (tuner, channel)
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without g_object_notify */
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gst_v4l2_tuner_set_channel (v4l2object, channel);
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}
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} else {
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g_free (v4l2object->channel);
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v4l2object->channel = g_value_dup_string (value);
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}
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break;
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case PROP_FREQUENCY:
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if (GST_V4L2_IS_OPEN (v4l2object)) {
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GstTuner *tuner = GST_TUNER (v4l2object->element);
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GstTunerChannel *channel = gst_tuner_get_channel (tuner);
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if (channel &&
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GST_TUNER_CHANNEL_HAS_FLAG (channel, GST_TUNER_CHANNEL_FREQUENCY)) {
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/* like
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gst_tuner_set_frequency (tuner, channel, g_value_get_ulong (value))
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without g_object_notify */
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gst_v4l2_tuner_set_frequency (v4l2object, channel,
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g_value_get_ulong (value));
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}
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} else {
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v4l2object->frequency = g_value_get_ulong (value);
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}
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break;
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#endif
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default:
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return FALSE;
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break;
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}
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return TRUE;
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}
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gboolean
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gst_v4l2_object_get_property_helper (GstV4l2Object * v4l2object,
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guint prop_id, GValue * value, GParamSpec * pspec)
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{
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switch (prop_id) {
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case PROP_DEVICE:
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g_value_set_string (value, v4l2object->videodev);
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break;
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case PROP_DEVICE_NAME:
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{
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const guchar *new = NULL;
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if (GST_V4L2_IS_OPEN (v4l2object)) {
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new = v4l2object->vcap.card;
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} else if (gst_v4l2_open (v4l2object)) {
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new = v4l2object->vcap.card;
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gst_v4l2_close (v4l2object);
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}
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g_value_set_string (value, (gchar *) new);
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break;
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}
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case PROP_DEVICE_FD:
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{
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if (GST_V4L2_IS_OPEN (v4l2object))
|
|
g_value_set_int (value, v4l2object->video_fd);
|
|
else
|
|
g_value_set_int (value, DEFAULT_PROP_DEVICE_FD);
|
|
break;
|
|
}
|
|
case PROP_FLAGS:
|
|
{
|
|
guint flags = 0;
|
|
|
|
if (GST_V4L2_IS_OPEN (v4l2object)) {
|
|
flags |= v4l2object->vcap.capabilities &
|
|
(V4L2_CAP_VIDEO_CAPTURE |
|
|
V4L2_CAP_VIDEO_OUTPUT |
|
|
V4L2_CAP_VIDEO_OVERLAY |
|
|
V4L2_CAP_VBI_CAPTURE |
|
|
V4L2_CAP_VBI_OUTPUT | V4L2_CAP_TUNER | V4L2_CAP_AUDIO);
|
|
}
|
|
g_value_set_flags (value, flags);
|
|
break;
|
|
}
|
|
default:
|
|
return FALSE;
|
|
break;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
gst_v4l2_set_defaults (GstV4l2Object * v4l2object)
|
|
{
|
|
GstTunerNorm *norm = NULL;
|
|
GstTunerChannel *channel = NULL;
|
|
GstTuner *tuner;
|
|
|
|
if (!GST_IS_TUNER (v4l2object->element))
|
|
return;
|
|
|
|
tuner = GST_TUNER (v4l2object->element);
|
|
|
|
if (v4l2object->norm)
|
|
norm = gst_tuner_find_norm_by_name (tuner, v4l2object->norm);
|
|
if (norm) {
|
|
gst_tuner_set_norm (tuner, norm);
|
|
} else {
|
|
norm =
|
|
GST_TUNER_NORM (gst_tuner_get_norm (GST_TUNER (v4l2object->element)));
|
|
if (norm) {
|
|
g_free (v4l2object->norm);
|
|
v4l2object->norm = g_strdup (norm->label);
|
|
gst_tuner_norm_changed (tuner, norm);
|
|
}
|
|
}
|
|
|
|
if (v4l2object->channel)
|
|
channel = gst_tuner_find_channel_by_name (tuner, v4l2object->channel);
|
|
if (channel) {
|
|
gst_tuner_set_channel (tuner, channel);
|
|
} else {
|
|
channel =
|
|
GST_TUNER_CHANNEL (gst_tuner_get_channel (GST_TUNER
|
|
(v4l2object->element)));
|
|
if (channel) {
|
|
g_free (v4l2object->channel);
|
|
v4l2object->channel = g_strdup (channel->label);
|
|
gst_tuner_channel_changed (tuner, channel);
|
|
}
|
|
}
|
|
|
|
if (channel
|
|
&& GST_TUNER_CHANNEL_HAS_FLAG (channel, GST_TUNER_CHANNEL_FREQUENCY)) {
|
|
if (v4l2object->frequency != 0) {
|
|
gst_tuner_set_frequency (tuner, channel, v4l2object->frequency);
|
|
} else {
|
|
v4l2object->frequency = gst_tuner_get_frequency (tuner, channel);
|
|
if (v4l2object->frequency == 0) {
|
|
/* guess */
|
|
gst_tuner_set_frequency (tuner, channel, 1000);
|
|
} else {
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
gboolean
|
|
gst_v4l2_object_start (GstV4l2Object * v4l2object)
|
|
{
|
|
if (gst_v4l2_open (v4l2object))
|
|
gst_v4l2_set_defaults (v4l2object);
|
|
else
|
|
return FALSE;
|
|
|
|
#if 0 /* overlay is still not implemented #ifdef HAVE_XVIDEO */
|
|
gst_v4l2_xoverlay_start (v4l2object);
|
|
#endif
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
gboolean
|
|
gst_v4l2_object_stop (GstV4l2Object * v4l2object)
|
|
{
|
|
#if 0 /* overlay is still not implemented #ifdef HAVE_XVIDEO */
|
|
gst_v4l2_xoverlay_stop (v4l2object);
|
|
#endif
|
|
|
|
if (!gst_v4l2_close (v4l2object))
|
|
return FALSE;
|
|
|
|
if (v4l2object->formats) {
|
|
gst_v4l2_object_clear_format_list (v4l2object);
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/*
|
|
* common format / caps utilities:
|
|
*/
|
|
typedef struct
|
|
{
|
|
guint32 format;
|
|
gboolean dimensions;
|
|
} GstV4L2FormatDesc;
|
|
|
|
static const GstV4L2FormatDesc gst_v4l2_formats[] = {
|
|
/* from Linux 2.6.15 videodev2.h */
|
|
{V4L2_PIX_FMT_RGB332, TRUE},
|
|
{V4L2_PIX_FMT_RGB555, TRUE},
|
|
{V4L2_PIX_FMT_RGB565, TRUE},
|
|
{V4L2_PIX_FMT_RGB555X, TRUE},
|
|
{V4L2_PIX_FMT_RGB565X, TRUE},
|
|
{V4L2_PIX_FMT_BGR24, TRUE},
|
|
{V4L2_PIX_FMT_RGB24, TRUE},
|
|
{V4L2_PIX_FMT_BGR32, TRUE},
|
|
{V4L2_PIX_FMT_RGB32, TRUE},
|
|
{V4L2_PIX_FMT_GREY, TRUE},
|
|
{V4L2_PIX_FMT_YVU410, TRUE},
|
|
{V4L2_PIX_FMT_YVU420, TRUE},
|
|
{V4L2_PIX_FMT_YUYV, TRUE},
|
|
{V4L2_PIX_FMT_UYVY, TRUE},
|
|
{V4L2_PIX_FMT_YUV422P, TRUE},
|
|
{V4L2_PIX_FMT_YUV411P, TRUE},
|
|
{V4L2_PIX_FMT_Y41P, TRUE},
|
|
|
|
/* two planes -- one Y, one Cr + Cb interleaved */
|
|
{V4L2_PIX_FMT_NV12, TRUE},
|
|
{V4L2_PIX_FMT_NV21, TRUE},
|
|
|
|
/* The following formats are not defined in the V4L2 specification */
|
|
{V4L2_PIX_FMT_YUV410, TRUE},
|
|
{V4L2_PIX_FMT_YUV420, TRUE},
|
|
{V4L2_PIX_FMT_YYUV, TRUE},
|
|
{V4L2_PIX_FMT_HI240, TRUE},
|
|
|
|
/* see http://www.siliconimaging.com/RGB%20Bayer.htm */
|
|
#ifdef V4L2_PIX_FMT_SBGGR8
|
|
{V4L2_PIX_FMT_SBGGR8, TRUE},
|
|
#endif
|
|
|
|
/* compressed formats */
|
|
{V4L2_PIX_FMT_MJPEG, TRUE},
|
|
{V4L2_PIX_FMT_JPEG, TRUE},
|
|
{V4L2_PIX_FMT_DV, TRUE},
|
|
{V4L2_PIX_FMT_MPEG, FALSE},
|
|
|
|
/* Vendor-specific formats */
|
|
{V4L2_PIX_FMT_WNVA, TRUE},
|
|
|
|
#ifdef V4L2_PIX_FMT_SN9C10X
|
|
{V4L2_PIX_FMT_SN9C10X, TRUE},
|
|
#endif
|
|
#ifdef V4L2_PIX_FMT_PWC1
|
|
{V4L2_PIX_FMT_PWC1, TRUE},
|
|
#endif
|
|
#ifdef V4L2_PIX_FMT_PWC2
|
|
{V4L2_PIX_FMT_PWC2, TRUE},
|
|
#endif
|
|
#ifdef V4L2_PIX_FMT_YVYU
|
|
{V4L2_PIX_FMT_YVYU, TRUE},
|
|
#endif
|
|
};
|
|
|
|
#define GST_V4L2_FORMAT_COUNT (G_N_ELEMENTS (gst_v4l2_formats))
|
|
|
|
|
|
static struct v4l2_fmtdesc *
|
|
gst_v4l2_object_get_format_from_fourcc (GstV4l2Object * v4l2object,
|
|
guint32 fourcc)
|
|
{
|
|
struct v4l2_fmtdesc *fmt;
|
|
GSList *walk;
|
|
|
|
if (fourcc == 0)
|
|
return NULL;
|
|
|
|
walk = gst_v4l2_object_get_format_list (v4l2object);
|
|
while (walk) {
|
|
fmt = (struct v4l2_fmtdesc *) walk->data;
|
|
if (fmt->pixelformat == fourcc)
|
|
return fmt;
|
|
/* special case for jpeg */
|
|
if ((fmt->pixelformat == V4L2_PIX_FMT_MJPEG && fourcc == V4L2_PIX_FMT_JPEG)
|
|
|| (fmt->pixelformat == V4L2_PIX_FMT_JPEG
|
|
&& fourcc == V4L2_PIX_FMT_MJPEG)) {
|
|
return fmt;
|
|
}
|
|
walk = g_slist_next (walk);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|
|
|
|
/* complete made up ranking, the values themselves are meaningless */
|
|
#define YUV_BASE_RANK 1000
|
|
#define JPEG_BASE_RANK 500
|
|
#define DV_BASE_RANK 200
|
|
#define RGB_BASE_RANK 100
|
|
#define YUV_ODD_BASE_RANK 50
|
|
#define RGB_ODD_BASE_RANK 25
|
|
#define BAYER_BASE_RANK 15
|
|
#define S910_BASE_RANK 10
|
|
#define GREY_BASE_RANK 5
|
|
#define PWC_BASE_RANK 1
|
|
|
|
/* This flag is already used by libv4l2 although
|
|
* it was added to the Linux kernel in 2.6.32
|
|
*/
|
|
#ifndef V4L2_FMT_FLAG_EMULATED
|
|
#define V4L2_FMT_FLAG_EMULATED 0x0002
|
|
#endif
|
|
|
|
static gint
|
|
gst_v4l2_object_format_get_rank (const struct v4l2_fmtdesc *fmt)
|
|
{
|
|
guint32 fourcc = fmt->pixelformat;
|
|
gboolean emulated = ((fmt->flags & V4L2_FMT_FLAG_EMULATED) != 0);
|
|
gint rank = 0;
|
|
|
|
switch (fourcc) {
|
|
case V4L2_PIX_FMT_MJPEG:
|
|
rank = JPEG_BASE_RANK;
|
|
break;
|
|
case V4L2_PIX_FMT_JPEG:
|
|
rank = JPEG_BASE_RANK + 1;
|
|
break;
|
|
case V4L2_PIX_FMT_MPEG: /* MPEG */
|
|
rank = JPEG_BASE_RANK + 2;
|
|
break;
|
|
|
|
case V4L2_PIX_FMT_RGB332:
|
|
case V4L2_PIX_FMT_RGB555:
|
|
case V4L2_PIX_FMT_RGB555X:
|
|
case V4L2_PIX_FMT_RGB565:
|
|
case V4L2_PIX_FMT_RGB565X:
|
|
rank = RGB_ODD_BASE_RANK;
|
|
break;
|
|
|
|
case V4L2_PIX_FMT_RGB24:
|
|
case V4L2_PIX_FMT_BGR24:
|
|
rank = RGB_BASE_RANK - 1;
|
|
break;
|
|
|
|
case V4L2_PIX_FMT_RGB32:
|
|
case V4L2_PIX_FMT_BGR32:
|
|
rank = RGB_BASE_RANK;
|
|
break;
|
|
|
|
case V4L2_PIX_FMT_GREY: /* 8 Greyscale */
|
|
rank = GREY_BASE_RANK;
|
|
break;
|
|
|
|
case V4L2_PIX_FMT_NV12: /* 12 Y/CbCr 4:2:0 */
|
|
case V4L2_PIX_FMT_NV21: /* 12 Y/CrCb 4:2:0 */
|
|
case V4L2_PIX_FMT_YYUV: /* 16 YUV 4:2:2 */
|
|
case V4L2_PIX_FMT_HI240: /* 8 8-bit color */
|
|
rank = YUV_ODD_BASE_RANK;
|
|
break;
|
|
|
|
case V4L2_PIX_FMT_YVU410: /* YVU9, 9 bits per pixel */
|
|
rank = YUV_BASE_RANK + 3;
|
|
break;
|
|
case V4L2_PIX_FMT_YUV410: /* YUV9, 9 bits per pixel */
|
|
rank = YUV_BASE_RANK + 2;
|
|
break;
|
|
case V4L2_PIX_FMT_YUV420: /* I420, 12 bits per pixel */
|
|
rank = YUV_BASE_RANK + 7;
|
|
break;
|
|
case V4L2_PIX_FMT_YUYV: /* YUY2, 16 bits per pixel */
|
|
rank = YUV_BASE_RANK + 10;
|
|
break;
|
|
case V4L2_PIX_FMT_YVU420: /* YV12, 12 bits per pixel */
|
|
rank = YUV_BASE_RANK + 6;
|
|
break;
|
|
case V4L2_PIX_FMT_UYVY: /* UYVY, 16 bits per pixel */
|
|
rank = YUV_BASE_RANK + 9;
|
|
break;
|
|
case V4L2_PIX_FMT_Y41P: /* Y41P, 12 bits per pixel */
|
|
rank = YUV_BASE_RANK + 5;
|
|
break;
|
|
case V4L2_PIX_FMT_YUV411P: /* Y41B, 12 bits per pixel */
|
|
rank = YUV_BASE_RANK + 4;
|
|
break;
|
|
case V4L2_PIX_FMT_YUV422P: /* Y42B, 16 bits per pixel */
|
|
rank = YUV_BASE_RANK + 8;
|
|
break;
|
|
|
|
case V4L2_PIX_FMT_DV:
|
|
rank = DV_BASE_RANK;
|
|
break;
|
|
|
|
case V4L2_PIX_FMT_WNVA: /* Winnov hw compres */
|
|
rank = 0;
|
|
break;
|
|
|
|
#ifdef V4L2_PIX_FMT_SBGGR8
|
|
case V4L2_PIX_FMT_SBGGR8:
|
|
rank = BAYER_BASE_RANK;
|
|
break;
|
|
#endif
|
|
|
|
#ifdef V4L2_PIX_FMT_SN9C10X
|
|
case V4L2_PIX_FMT_SN9C10X:
|
|
rank = S910_BASE_RANK;
|
|
break;
|
|
#endif
|
|
|
|
#ifdef V4L2_PIX_FMT_PWC1
|
|
case V4L2_PIX_FMT_PWC1:
|
|
rank = PWC_BASE_RANK;
|
|
break;
|
|
#endif
|
|
#ifdef V4L2_PIX_FMT_PWC2
|
|
case V4L2_PIX_FMT_PWC2:
|
|
rank = PWC_BASE_RANK;
|
|
break;
|
|
#endif
|
|
|
|
default:
|
|
rank = 0;
|
|
break;
|
|
}
|
|
|
|
/* All ranks are below 1<<15 so a shift by 15
|
|
* will a) make all non-emulated formats larger
|
|
* than emulated and b) will not overflow
|
|
*/
|
|
if (!emulated)
|
|
rank <<= 15;
|
|
|
|
return rank;
|
|
}
|
|
|
|
|
|
|
|
static gint
|
|
format_cmp_func (gconstpointer a, gconstpointer b)
|
|
{
|
|
const struct v4l2_fmtdesc *fa = a;
|
|
const struct v4l2_fmtdesc *fb = b;
|
|
|
|
if (fa->pixelformat == fb->pixelformat)
|
|
return 0;
|
|
|
|
return gst_v4l2_object_format_get_rank (fa) -
|
|
gst_v4l2_object_format_get_rank (fb);
|
|
}
|
|
|
|
/******************************************************
|
|
* gst_v4l2_object_fill_format_list():
|
|
* create list of supported capture formats
|
|
* return value: TRUE on success, FALSE on error
|
|
******************************************************/
|
|
static gboolean
|
|
gst_v4l2_object_fill_format_list (GstV4l2Object * v4l2object)
|
|
{
|
|
gint n;
|
|
struct v4l2_fmtdesc *format;
|
|
|
|
GST_DEBUG_OBJECT (v4l2object->element, "getting src format enumerations");
|
|
|
|
/* format enumeration */
|
|
for (n = 0;; n++) {
|
|
format = g_new0 (struct v4l2_fmtdesc, 1);
|
|
|
|
format->index = n;
|
|
format->type = v4l2object->type;
|
|
|
|
if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_ENUM_FMT, format) < 0) {
|
|
if (errno == EINVAL) {
|
|
g_free (format);
|
|
break; /* end of enumeration */
|
|
} else {
|
|
goto failed;
|
|
}
|
|
}
|
|
|
|
GST_LOG_OBJECT (v4l2object->element, "index: %u", format->index);
|
|
GST_LOG_OBJECT (v4l2object->element, "type: %d", format->type);
|
|
GST_LOG_OBJECT (v4l2object->element, "flags: %08x", format->flags);
|
|
GST_LOG_OBJECT (v4l2object->element, "description: '%s'",
|
|
format->description);
|
|
GST_LOG_OBJECT (v4l2object->element, "pixelformat: %" GST_FOURCC_FORMAT,
|
|
GST_FOURCC_ARGS (format->pixelformat));
|
|
|
|
/* sort formats according to our preference; we do this, because caps
|
|
* are probed in the order the formats are in the list, and the order of
|
|
* formats in the final probed caps matters for things like fixation */
|
|
v4l2object->formats = g_slist_insert_sorted (v4l2object->formats, format,
|
|
(GCompareFunc) format_cmp_func);
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (v4l2object->element, "got %d format(s)", n);
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
failed:
|
|
{
|
|
GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS,
|
|
(_("Failed to enumerate possible video formats device '%s' can work with"), v4l2object->videodev), ("Failed to get number %d in pixelformat enumeration for %s. (%d - %s)", n, v4l2object->videodev, errno, g_strerror (errno)));
|
|
g_free (format);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Get the list of supported capture formats, a list of
|
|
* <code>struct v4l2_fmtdesc</code>.
|
|
*/
|
|
GSList *
|
|
gst_v4l2_object_get_format_list (GstV4l2Object * v4l2object)
|
|
{
|
|
if (!v4l2object->formats)
|
|
gst_v4l2_object_fill_format_list (v4l2object);
|
|
return v4l2object->formats;
|
|
}
|
|
|
|
|
|
GstStructure *
|
|
gst_v4l2_object_v4l2fourcc_to_structure (guint32 fourcc)
|
|
{
|
|
GstStructure *structure = NULL;
|
|
|
|
switch (fourcc) {
|
|
case V4L2_PIX_FMT_MJPEG: /* Motion-JPEG */
|
|
case V4L2_PIX_FMT_JPEG: /* JFIF JPEG */
|
|
structure = gst_structure_new ("image/jpeg", NULL);
|
|
break;
|
|
case V4L2_PIX_FMT_RGB332:
|
|
case V4L2_PIX_FMT_RGB555:
|
|
case V4L2_PIX_FMT_RGB555X:
|
|
case V4L2_PIX_FMT_RGB565:
|
|
case V4L2_PIX_FMT_RGB565X:
|
|
case V4L2_PIX_FMT_RGB24:
|
|
case V4L2_PIX_FMT_BGR24:
|
|
case V4L2_PIX_FMT_RGB32:
|
|
case V4L2_PIX_FMT_BGR32:{
|
|
guint depth = 0, bpp = 0;
|
|
|
|
gint endianness = 0;
|
|
|
|
guint32 r_mask = 0, b_mask = 0, g_mask = 0;
|
|
|
|
switch (fourcc) {
|
|
case V4L2_PIX_FMT_RGB332:
|
|
bpp = depth = 8;
|
|
endianness = G_BYTE_ORDER; /* 'like, whatever' */
|
|
r_mask = 0xe0;
|
|
g_mask = 0x1c;
|
|
b_mask = 0x03;
|
|
break;
|
|
case V4L2_PIX_FMT_RGB555:
|
|
case V4L2_PIX_FMT_RGB555X:
|
|
bpp = 16;
|
|
depth = 15;
|
|
endianness =
|
|
fourcc == V4L2_PIX_FMT_RGB555X ? G_BIG_ENDIAN : G_LITTLE_ENDIAN;
|
|
r_mask = 0x7c00;
|
|
g_mask = 0x03e0;
|
|
b_mask = 0x001f;
|
|
break;
|
|
case V4L2_PIX_FMT_RGB565:
|
|
case V4L2_PIX_FMT_RGB565X:
|
|
bpp = depth = 16;
|
|
endianness =
|
|
fourcc == V4L2_PIX_FMT_RGB565X ? G_BIG_ENDIAN : G_LITTLE_ENDIAN;
|
|
r_mask = 0xf800;
|
|
g_mask = 0x07e0;
|
|
b_mask = 0x001f;
|
|
break;
|
|
case V4L2_PIX_FMT_RGB24:
|
|
bpp = depth = 24;
|
|
endianness = G_BIG_ENDIAN;
|
|
r_mask = 0xff0000;
|
|
g_mask = 0x00ff00;
|
|
b_mask = 0x0000ff;
|
|
break;
|
|
case V4L2_PIX_FMT_BGR24:
|
|
bpp = depth = 24;
|
|
endianness = G_BIG_ENDIAN;
|
|
r_mask = 0x0000ff;
|
|
g_mask = 0x00ff00;
|
|
b_mask = 0xff0000;
|
|
break;
|
|
case V4L2_PIX_FMT_RGB32:
|
|
bpp = depth = 32;
|
|
endianness = G_BIG_ENDIAN;
|
|
r_mask = 0xff000000;
|
|
g_mask = 0x00ff0000;
|
|
b_mask = 0x0000ff00;
|
|
break;
|
|
case V4L2_PIX_FMT_BGR32:
|
|
bpp = depth = 32;
|
|
endianness = G_BIG_ENDIAN;
|
|
r_mask = 0x000000ff;
|
|
g_mask = 0x0000ff00;
|
|
b_mask = 0x00ff0000;
|
|
break;
|
|
default:
|
|
g_assert_not_reached ();
|
|
break;
|
|
}
|
|
structure = gst_structure_new ("video/x-raw-rgb",
|
|
"bpp", G_TYPE_INT, bpp,
|
|
"depth", G_TYPE_INT, depth,
|
|
"red_mask", G_TYPE_INT, r_mask,
|
|
"green_mask", G_TYPE_INT, g_mask,
|
|
"blue_mask", G_TYPE_INT, b_mask,
|
|
"endianness", G_TYPE_INT, endianness, NULL);
|
|
break;
|
|
}
|
|
case V4L2_PIX_FMT_GREY: /* 8 Greyscale */
|
|
structure = gst_structure_new ("video/x-raw-gray",
|
|
"bpp", G_TYPE_INT, 8, NULL);
|
|
break;
|
|
case V4L2_PIX_FMT_YYUV: /* 16 YUV 4:2:2 */
|
|
case V4L2_PIX_FMT_HI240: /* 8 8-bit color */
|
|
/* FIXME: get correct fourccs here */
|
|
break;
|
|
case V4L2_PIX_FMT_NV12: /* 12 Y/CbCr 4:2:0 */
|
|
case V4L2_PIX_FMT_NV21: /* 12 Y/CrCb 4:2:0 */
|
|
case V4L2_PIX_FMT_YVU410:
|
|
case V4L2_PIX_FMT_YUV410:
|
|
case V4L2_PIX_FMT_YUV420: /* I420/IYUV */
|
|
case V4L2_PIX_FMT_YUYV:
|
|
case V4L2_PIX_FMT_YVU420:
|
|
case V4L2_PIX_FMT_UYVY:
|
|
case V4L2_PIX_FMT_Y41P:
|
|
case V4L2_PIX_FMT_YUV422P:
|
|
#ifdef V4L2_PIX_FMT_YVYU
|
|
case V4L2_PIX_FMT_YVYU:
|
|
#endif
|
|
case V4L2_PIX_FMT_YUV411P:{
|
|
guint32 fcc = 0;
|
|
|
|
switch (fourcc) {
|
|
case V4L2_PIX_FMT_NV12:
|
|
fcc = GST_MAKE_FOURCC ('N', 'V', '1', '2');
|
|
break;
|
|
case V4L2_PIX_FMT_NV21:
|
|
fcc = GST_MAKE_FOURCC ('N', 'V', '2', '1');
|
|
break;
|
|
case V4L2_PIX_FMT_YVU410:
|
|
fcc = GST_MAKE_FOURCC ('Y', 'V', 'U', '9');
|
|
break;
|
|
case V4L2_PIX_FMT_YUV410:
|
|
fcc = GST_MAKE_FOURCC ('Y', 'U', 'V', '9');
|
|
break;
|
|
case V4L2_PIX_FMT_YUV420:
|
|
fcc = GST_MAKE_FOURCC ('I', '4', '2', '0');
|
|
break;
|
|
case V4L2_PIX_FMT_YUYV:
|
|
fcc = GST_MAKE_FOURCC ('Y', 'U', 'Y', '2');
|
|
break;
|
|
case V4L2_PIX_FMT_YVU420:
|
|
fcc = GST_MAKE_FOURCC ('Y', 'V', '1', '2');
|
|
break;
|
|
case V4L2_PIX_FMT_UYVY:
|
|
fcc = GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y');
|
|
break;
|
|
case V4L2_PIX_FMT_Y41P:
|
|
fcc = GST_MAKE_FOURCC ('Y', '4', '1', 'P');
|
|
break;
|
|
case V4L2_PIX_FMT_YUV411P:
|
|
fcc = GST_MAKE_FOURCC ('Y', '4', '1', 'B');
|
|
break;
|
|
case V4L2_PIX_FMT_YUV422P:
|
|
fcc = GST_MAKE_FOURCC ('Y', '4', '2', 'B');
|
|
break;
|
|
#ifdef V4L2_PIX_FMT_YVYU
|
|
case V4L2_PIX_FMT_YVYU:
|
|
fcc = GST_MAKE_FOURCC ('Y', 'V', 'Y', 'U');
|
|
break;
|
|
#endif
|
|
default:
|
|
g_assert_not_reached ();
|
|
break;
|
|
}
|
|
structure = gst_structure_new ("video/x-raw-yuv",
|
|
"format", GST_TYPE_FOURCC, fcc, NULL);
|
|
break;
|
|
}
|
|
case V4L2_PIX_FMT_DV:
|
|
structure =
|
|
gst_structure_new ("video/x-dv", "systemstream", G_TYPE_BOOLEAN, TRUE,
|
|
NULL);
|
|
break;
|
|
case V4L2_PIX_FMT_MPEG: /* MPEG */
|
|
structure = gst_structure_new ("video/mpegts", NULL);
|
|
break;
|
|
case V4L2_PIX_FMT_WNVA: /* Winnov hw compres */
|
|
break;
|
|
#ifdef V4L2_PIX_FMT_SBGGR8
|
|
case V4L2_PIX_FMT_SBGGR8:
|
|
structure = gst_structure_new ("video/x-raw-bayer", NULL);
|
|
break;
|
|
#endif
|
|
#ifdef V4L2_PIX_FMT_SN9C10X
|
|
case V4L2_PIX_FMT_SN9C10X:
|
|
structure = gst_structure_new ("video/x-sonix", NULL);
|
|
break;
|
|
#endif
|
|
#ifdef V4L2_PIX_FMT_PWC1
|
|
case V4L2_PIX_FMT_PWC1:
|
|
structure = gst_structure_new ("video/x-pwc1", NULL);
|
|
break;
|
|
#endif
|
|
#ifdef V4L2_PIX_FMT_PWC2
|
|
case V4L2_PIX_FMT_PWC2:
|
|
structure = gst_structure_new ("video/x-pwc2", NULL);
|
|
break;
|
|
#endif
|
|
default:
|
|
GST_DEBUG ("Unknown fourcc 0x%08x %" GST_FOURCC_FORMAT,
|
|
fourcc, GST_FOURCC_ARGS (fourcc));
|
|
break;
|
|
}
|
|
|
|
return structure;
|
|
}
|
|
|
|
|
|
|
|
GstCaps *
|
|
gst_v4l2_object_get_all_caps (void)
|
|
{
|
|
static GstCaps *caps = NULL;
|
|
|
|
if (caps == NULL) {
|
|
GstStructure *structure;
|
|
|
|
guint i;
|
|
|
|
caps = gst_caps_new_empty ();
|
|
for (i = 0; i < GST_V4L2_FORMAT_COUNT; i++) {
|
|
structure =
|
|
gst_v4l2_object_v4l2fourcc_to_structure (gst_v4l2_formats[i].format);
|
|
if (structure) {
|
|
if (gst_v4l2_formats[i].dimensions) {
|
|
gst_structure_set (structure,
|
|
"width", GST_TYPE_INT_RANGE, 1, GST_V4L2_MAX_SIZE,
|
|
"height", GST_TYPE_INT_RANGE, 1, GST_V4L2_MAX_SIZE,
|
|
"framerate", GST_TYPE_FRACTION_RANGE, 0, 1, 100, 1, NULL);
|
|
}
|
|
gst_caps_append_structure (caps, structure);
|
|
}
|
|
}
|
|
}
|
|
|
|
return gst_caps_ref (caps);
|
|
}
|
|
|
|
|
|
/* collect data for the given caps
|
|
* @caps: given input caps
|
|
* @format: location for the v4l format
|
|
* @w/@h: location for width and height
|
|
* @fps_n/@fps_d: location for framerate
|
|
* @size: location for expected size of the frame or 0 if unknown
|
|
*/
|
|
gboolean
|
|
gst_v4l2_object_get_caps_info (GstV4l2Object * v4l2object, GstCaps * caps,
|
|
struct v4l2_fmtdesc ** format, gint * w, gint * h, guint * fps_n,
|
|
guint * fps_d, guint * size)
|
|
{
|
|
GstStructure *structure;
|
|
const GValue *framerate;
|
|
guint32 fourcc;
|
|
const gchar *mimetype;
|
|
guint outsize;
|
|
|
|
/* default unknown values */
|
|
fourcc = 0;
|
|
outsize = 0;
|
|
|
|
structure = gst_caps_get_structure (caps, 0);
|
|
|
|
mimetype = gst_structure_get_name (structure);
|
|
|
|
if (strcmp (mimetype, "video/mpegts") == 0) {
|
|
fourcc = V4L2_PIX_FMT_MPEG;
|
|
outsize = 8192;
|
|
*fps_n = 0;
|
|
*fps_d = 1;
|
|
goto done;
|
|
}
|
|
|
|
if (!gst_structure_get_int (structure, "width", w))
|
|
return FALSE;
|
|
|
|
if (!gst_structure_get_int (structure, "height", h))
|
|
return FALSE;
|
|
|
|
framerate = gst_structure_get_value (structure, "framerate");
|
|
if (!framerate)
|
|
return FALSE;
|
|
|
|
*fps_n = gst_value_get_fraction_numerator (framerate);
|
|
*fps_d = gst_value_get_fraction_denominator (framerate);
|
|
|
|
if (!strcmp (mimetype, "video/x-raw-yuv")) {
|
|
gst_structure_get_fourcc (structure, "format", &fourcc);
|
|
|
|
switch (fourcc) {
|
|
case GST_MAKE_FOURCC ('I', '4', '2', '0'):
|
|
case GST_MAKE_FOURCC ('I', 'Y', 'U', 'V'):
|
|
fourcc = V4L2_PIX_FMT_YUV420;
|
|
outsize = GST_ROUND_UP_4 (*w) * GST_ROUND_UP_2 (*h);
|
|
outsize += 2 * ((GST_ROUND_UP_8 (*w) / 2) * (GST_ROUND_UP_2 (*h) / 2));
|
|
break;
|
|
case GST_MAKE_FOURCC ('Y', 'U', 'Y', '2'):
|
|
fourcc = V4L2_PIX_FMT_YUYV;
|
|
outsize = (GST_ROUND_UP_2 (*w) * 2) * *h;
|
|
break;
|
|
case GST_MAKE_FOURCC ('Y', '4', '1', 'P'):
|
|
fourcc = V4L2_PIX_FMT_Y41P;
|
|
outsize = (GST_ROUND_UP_2 (*w) * 2) * *h;
|
|
break;
|
|
case GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y'):
|
|
fourcc = V4L2_PIX_FMT_UYVY;
|
|
outsize = (GST_ROUND_UP_2 (*w) * 2) * *h;
|
|
break;
|
|
case GST_MAKE_FOURCC ('Y', 'V', '1', '2'):
|
|
fourcc = V4L2_PIX_FMT_YVU420;
|
|
outsize = GST_ROUND_UP_4 (*w) * GST_ROUND_UP_2 (*h);
|
|
outsize += 2 * ((GST_ROUND_UP_8 (*w) / 2) * (GST_ROUND_UP_2 (*h) / 2));
|
|
break;
|
|
case GST_MAKE_FOURCC ('Y', '4', '1', 'B'):
|
|
fourcc = V4L2_PIX_FMT_YUV411P;
|
|
outsize = GST_ROUND_UP_4 (*w) * *h;
|
|
outsize += 2 * ((GST_ROUND_UP_8 (*w) / 4) * *h);
|
|
break;
|
|
case GST_MAKE_FOURCC ('Y', '4', '2', 'B'):
|
|
fourcc = V4L2_PIX_FMT_YUV422P;
|
|
outsize = GST_ROUND_UP_4 (*w) * *h;
|
|
outsize += 2 * ((GST_ROUND_UP_8 (*w) / 2) * *h);
|
|
break;
|
|
case GST_MAKE_FOURCC ('N', 'V', '1', '2'):
|
|
fourcc = V4L2_PIX_FMT_NV12;
|
|
outsize = GST_ROUND_UP_4 (*w) * GST_ROUND_UP_2 (*h);
|
|
outsize += (GST_ROUND_UP_4 (*w) * *h) / 2;
|
|
break;
|
|
case GST_MAKE_FOURCC ('N', 'V', '2', '1'):
|
|
fourcc = V4L2_PIX_FMT_NV21;
|
|
outsize = GST_ROUND_UP_4 (*w) * GST_ROUND_UP_2 (*h);
|
|
outsize += (GST_ROUND_UP_4 (*w) * *h) / 2;
|
|
break;
|
|
#ifdef V4L2_PIX_FMT_YVYU
|
|
case GST_MAKE_FOURCC ('Y', 'V', 'Y', 'U'):
|
|
fourcc = V4L2_PIX_FMT_YVYU;
|
|
outsize = (GST_ROUND_UP_2 (*w) * 2) * *h;
|
|
break;
|
|
#endif
|
|
}
|
|
} else if (!strcmp (mimetype, "video/x-raw-rgb")) {
|
|
gint depth, endianness, r_mask;
|
|
|
|
gst_structure_get_int (structure, "depth", &depth);
|
|
gst_structure_get_int (structure, "endianness", &endianness);
|
|
gst_structure_get_int (structure, "red_mask", &r_mask);
|
|
|
|
switch (depth) {
|
|
case 8:
|
|
fourcc = V4L2_PIX_FMT_RGB332;
|
|
break;
|
|
case 15:
|
|
fourcc = (endianness == G_LITTLE_ENDIAN) ?
|
|
V4L2_PIX_FMT_RGB555 : V4L2_PIX_FMT_RGB555X;
|
|
break;
|
|
case 16:
|
|
fourcc = (endianness == G_LITTLE_ENDIAN) ?
|
|
V4L2_PIX_FMT_RGB565 : V4L2_PIX_FMT_RGB565X;
|
|
break;
|
|
case 24:
|
|
fourcc = (r_mask == 0xFF) ? V4L2_PIX_FMT_BGR24 : V4L2_PIX_FMT_RGB24;
|
|
break;
|
|
case 32:
|
|
fourcc = (r_mask == 0xFF) ? V4L2_PIX_FMT_BGR32 : V4L2_PIX_FMT_RGB32;
|
|
break;
|
|
}
|
|
} else if (strcmp (mimetype, "video/x-dv") == 0) {
|
|
fourcc = V4L2_PIX_FMT_DV;
|
|
} else if (strcmp (mimetype, "image/jpeg") == 0) {
|
|
fourcc = V4L2_PIX_FMT_JPEG;
|
|
#ifdef V4L2_PIX_FMT_SBGGR8
|
|
} else if (strcmp (mimetype, "video/x-raw-bayer") == 0) {
|
|
fourcc = V4L2_PIX_FMT_SBGGR8;
|
|
#endif
|
|
#ifdef V4L2_PIX_FMT_SN9C10X
|
|
} else if (strcmp (mimetype, "video/x-sonix") == 0) {
|
|
fourcc = V4L2_PIX_FMT_SN9C10X;
|
|
#endif
|
|
#ifdef V4L2_PIX_FMT_PWC1
|
|
} else if (strcmp (mimetype, "video/x-pwc1") == 0) {
|
|
fourcc = V4L2_PIX_FMT_PWC1;
|
|
#endif
|
|
#ifdef V4L2_PIX_FMT_PWC2
|
|
} else if (strcmp (mimetype, "video/x-pwc2") == 0) {
|
|
fourcc = V4L2_PIX_FMT_PWC2;
|
|
#endif
|
|
} else if (strcmp (mimetype, "video/x-raw-gray") == 0) {
|
|
fourcc = V4L2_PIX_FMT_GREY;
|
|
}
|
|
|
|
if (fourcc == 0)
|
|
return FALSE;
|
|
|
|
done:
|
|
*format = gst_v4l2_object_get_format_from_fourcc (v4l2object, fourcc);
|
|
*size = outsize;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
|
|
/* The frame interval enumeration code first appeared in Linux 2.6.19. */
|
|
#ifdef VIDIOC_ENUM_FRAMEINTERVALS
|
|
static GstStructure *
|
|
gst_v4l2_object_probe_caps_for_format_and_size (GstV4l2Object * v4l2object,
|
|
guint32 pixelformat,
|
|
guint32 width, guint32 height, const GstStructure * template)
|
|
{
|
|
gint fd = v4l2object->video_fd;
|
|
struct v4l2_frmivalenum ival;
|
|
guint32 num, denom;
|
|
GstStructure *s;
|
|
GValue rates = { 0, };
|
|
|
|
memset (&ival, 0, sizeof (struct v4l2_frmivalenum));
|
|
ival.index = 0;
|
|
ival.pixel_format = pixelformat;
|
|
ival.width = width;
|
|
ival.height = height;
|
|
|
|
GST_LOG_OBJECT (v4l2object->element,
|
|
"get frame interval for %ux%u, %" GST_FOURCC_FORMAT, width, height,
|
|
GST_FOURCC_ARGS (pixelformat));
|
|
|
|
/* keep in mind that v4l2 gives us frame intervals (durations); we invert the
|
|
* fraction to get framerate */
|
|
if (v4l2_ioctl (fd, VIDIOC_ENUM_FRAMEINTERVALS, &ival) < 0)
|
|
goto enum_frameintervals_failed;
|
|
|
|
if (ival.type == V4L2_FRMIVAL_TYPE_DISCRETE) {
|
|
GValue rate = { 0, };
|
|
|
|
g_value_init (&rates, GST_TYPE_LIST);
|
|
g_value_init (&rate, GST_TYPE_FRACTION);
|
|
|
|
do {
|
|
num = ival.discrete.numerator;
|
|
denom = ival.discrete.denominator;
|
|
|
|
if (num > G_MAXINT || denom > G_MAXINT) {
|
|
/* let us hope we don't get here... */
|
|
num >>= 1;
|
|
denom >>= 1;
|
|
}
|
|
|
|
GST_LOG_OBJECT (v4l2object->element, "adding discrete framerate: %d/%d",
|
|
denom, num);
|
|
|
|
/* swap to get the framerate */
|
|
gst_value_set_fraction (&rate, denom, num);
|
|
gst_value_list_append_value (&rates, &rate);
|
|
|
|
ival.index++;
|
|
} while (v4l2_ioctl (fd, VIDIOC_ENUM_FRAMEINTERVALS, &ival) >= 0);
|
|
} else if (ival.type == V4L2_FRMIVAL_TYPE_STEPWISE) {
|
|
GValue min = { 0, };
|
|
GValue step = { 0, };
|
|
GValue max = { 0, };
|
|
gboolean added = FALSE;
|
|
guint32 minnum, mindenom;
|
|
guint32 maxnum, maxdenom;
|
|
|
|
g_value_init (&rates, GST_TYPE_LIST);
|
|
|
|
g_value_init (&min, GST_TYPE_FRACTION);
|
|
g_value_init (&step, GST_TYPE_FRACTION);
|
|
g_value_init (&max, GST_TYPE_FRACTION);
|
|
|
|
/* get the min */
|
|
minnum = ival.stepwise.min.numerator;
|
|
mindenom = ival.stepwise.min.denominator;
|
|
if (minnum > G_MAXINT || mindenom > G_MAXINT) {
|
|
minnum >>= 1;
|
|
mindenom >>= 1;
|
|
}
|
|
GST_LOG_OBJECT (v4l2object->element, "stepwise min frame interval: %d/%d",
|
|
minnum, mindenom);
|
|
gst_value_set_fraction (&min, minnum, mindenom);
|
|
|
|
/* get the max */
|
|
maxnum = ival.stepwise.max.numerator;
|
|
maxdenom = ival.stepwise.max.denominator;
|
|
if (maxnum > G_MAXINT || maxdenom > G_MAXINT) {
|
|
maxnum >>= 1;
|
|
maxdenom >>= 1;
|
|
}
|
|
|
|
GST_LOG_OBJECT (v4l2object->element, "stepwise max frame interval: %d/%d",
|
|
maxnum, maxdenom);
|
|
gst_value_set_fraction (&max, maxnum, maxdenom);
|
|
|
|
/* get the step */
|
|
num = ival.stepwise.step.numerator;
|
|
denom = ival.stepwise.step.denominator;
|
|
if (num > G_MAXINT || denom > G_MAXINT) {
|
|
num >>= 1;
|
|
denom >>= 1;
|
|
}
|
|
|
|
if (num == 0 || denom == 0) {
|
|
/* in this case we have a wrong fraction or no step, set the step to max
|
|
* so that we only add the min value in the loop below */
|
|
num = maxnum;
|
|
denom = maxdenom;
|
|
}
|
|
|
|
/* since we only have gst_value_fraction_subtract and not add, negate the
|
|
* numerator */
|
|
GST_LOG_OBJECT (v4l2object->element, "stepwise step frame interval: %d/%d",
|
|
num, denom);
|
|
gst_value_set_fraction (&step, -num, denom);
|
|
|
|
while (gst_value_compare (&min, &max) <= 0) {
|
|
GValue rate = { 0, };
|
|
|
|
num = gst_value_get_fraction_numerator (&min);
|
|
denom = gst_value_get_fraction_denominator (&min);
|
|
GST_LOG_OBJECT (v4l2object->element, "adding stepwise framerate: %d/%d",
|
|
denom, num);
|
|
|
|
/* invert to get the framerate */
|
|
g_value_init (&rate, GST_TYPE_FRACTION);
|
|
gst_value_set_fraction (&rate, denom, num);
|
|
gst_value_list_append_value (&rates, &rate);
|
|
added = TRUE;
|
|
|
|
/* we're actually adding because step was negated above. This is because
|
|
* there is no _add function... */
|
|
if (!gst_value_fraction_subtract (&min, &min, &step)) {
|
|
GST_WARNING_OBJECT (v4l2object->element, "could not step fraction!");
|
|
break;
|
|
}
|
|
}
|
|
if (!added) {
|
|
/* no range was added, leave the default range from the template */
|
|
GST_WARNING_OBJECT (v4l2object->element,
|
|
"no range added, leaving default");
|
|
g_value_unset (&rates);
|
|
}
|
|
} else if (ival.type == V4L2_FRMIVAL_TYPE_CONTINUOUS) {
|
|
guint32 maxnum, maxdenom;
|
|
|
|
g_value_init (&rates, GST_TYPE_FRACTION_RANGE);
|
|
|
|
num = ival.stepwise.min.numerator;
|
|
denom = ival.stepwise.min.denominator;
|
|
if (num > G_MAXINT || denom > G_MAXINT) {
|
|
num >>= 1;
|
|
denom >>= 1;
|
|
}
|
|
|
|
maxnum = ival.stepwise.max.numerator;
|
|
maxdenom = ival.stepwise.max.denominator;
|
|
if (maxnum > G_MAXINT || maxdenom > G_MAXINT) {
|
|
maxnum >>= 1;
|
|
maxdenom >>= 1;
|
|
}
|
|
|
|
GST_LOG_OBJECT (v4l2object->element,
|
|
"continuous frame interval %d/%d to %d/%d", maxdenom, maxnum, denom,
|
|
num);
|
|
|
|
gst_value_set_fraction_range_full (&rates, maxdenom, maxnum, denom, num);
|
|
} else {
|
|
goto unknown_type;
|
|
}
|
|
|
|
return_data:
|
|
s = gst_structure_copy (template);
|
|
gst_structure_set (s, "width", G_TYPE_INT, (gint) width,
|
|
"height", G_TYPE_INT, (gint) height, NULL);
|
|
|
|
if (G_IS_VALUE (&rates)) {
|
|
/* only change the framerate on the template when we have a valid probed new
|
|
* value */
|
|
gst_structure_set_value (s, "framerate", &rates);
|
|
g_value_unset (&rates);
|
|
} else {
|
|
gst_structure_set (s, "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, 100, 1,
|
|
NULL);
|
|
}
|
|
return s;
|
|
|
|
/* ERRORS */
|
|
enum_frameintervals_failed:
|
|
{
|
|
GST_DEBUG_OBJECT (v4l2object->element,
|
|
"Unable to enumerate intervals for %" GST_FOURCC_FORMAT "@%ux%u",
|
|
GST_FOURCC_ARGS (pixelformat), width, height);
|
|
goto return_data;
|
|
}
|
|
unknown_type:
|
|
{
|
|
/* I don't see how this is actually an error, we ignore the format then */
|
|
GST_WARNING_OBJECT (v4l2object->element,
|
|
"Unknown frame interval type at %" GST_FOURCC_FORMAT "@%ux%u: %u",
|
|
GST_FOURCC_ARGS (pixelformat), width, height, ival.type);
|
|
return NULL;
|
|
}
|
|
}
|
|
#endif /* defined VIDIOC_ENUM_FRAMEINTERVALS */
|
|
|
|
#ifdef VIDIOC_ENUM_FRAMESIZES
|
|
static gint
|
|
sort_by_frame_size (GstStructure * s1, GstStructure * s2)
|
|
{
|
|
int w1, h1, w2, h2;
|
|
|
|
gst_structure_get_int (s1, "width", &w1);
|
|
gst_structure_get_int (s1, "height", &h1);
|
|
gst_structure_get_int (s2, "width", &w2);
|
|
gst_structure_get_int (s2, "height", &h2);
|
|
|
|
/* I think it's safe to assume that this won't overflow for a while */
|
|
return ((w2 * h2) - (w1 * h1));
|
|
}
|
|
#endif
|
|
|
|
static gboolean
|
|
gst_v4l2_object_get_nearest_size (GstV4l2Object * v4l2object,
|
|
guint32 pixelformat, gint * width, gint * height);
|
|
|
|
GstCaps *
|
|
gst_v4l2_object_probe_caps_for_format (GstV4l2Object * v4l2object,
|
|
guint32 pixelformat, const GstStructure * template)
|
|
{
|
|
GstCaps *ret = gst_caps_new_empty ();
|
|
GstStructure *tmp;
|
|
|
|
#ifdef VIDIOC_ENUM_FRAMESIZES
|
|
gint fd = v4l2object->video_fd;
|
|
struct v4l2_frmsizeenum size;
|
|
GList *results = NULL;
|
|
guint32 w, h;
|
|
|
|
if (pixelformat == GST_MAKE_FOURCC ('M', 'P', 'E', 'G'))
|
|
return gst_caps_new_simple ("video/mpegts", NULL);
|
|
|
|
memset (&size, 0, sizeof (struct v4l2_frmsizeenum));
|
|
size.index = 0;
|
|
size.pixel_format = pixelformat;
|
|
|
|
GST_DEBUG_OBJECT (v4l2object->element, "Enumerating frame sizes");
|
|
|
|
if (v4l2_ioctl (fd, VIDIOC_ENUM_FRAMESIZES, &size) < 0)
|
|
goto enum_framesizes_failed;
|
|
|
|
if (size.type == V4L2_FRMSIZE_TYPE_DISCRETE) {
|
|
do {
|
|
GST_LOG_OBJECT (v4l2object->element, "got discrete frame size %dx%d",
|
|
size.discrete.width, size.discrete.height);
|
|
|
|
w = MIN (size.discrete.width, G_MAXINT);
|
|
h = MIN (size.discrete.height, G_MAXINT);
|
|
|
|
if (w && h) {
|
|
tmp =
|
|
gst_v4l2_object_probe_caps_for_format_and_size (v4l2object,
|
|
pixelformat, w, h, template);
|
|
|
|
if (tmp)
|
|
results = g_list_prepend (results, tmp);
|
|
}
|
|
|
|
size.index++;
|
|
} while (v4l2_ioctl (fd, VIDIOC_ENUM_FRAMESIZES, &size) >= 0);
|
|
GST_DEBUG_OBJECT (v4l2object->element,
|
|
"done iterating discrete frame sizes");
|
|
} else if (size.type == V4L2_FRMSIZE_TYPE_STEPWISE) {
|
|
GST_DEBUG_OBJECT (v4l2object->element, "we have stepwise frame sizes:");
|
|
GST_DEBUG_OBJECT (v4l2object->element, "min width: %d",
|
|
size.stepwise.min_width);
|
|
GST_DEBUG_OBJECT (v4l2object->element, "min height: %d",
|
|
size.stepwise.min_height);
|
|
GST_DEBUG_OBJECT (v4l2object->element, "max width: %d",
|
|
size.stepwise.max_width);
|
|
GST_DEBUG_OBJECT (v4l2object->element, "min height: %d",
|
|
size.stepwise.max_height);
|
|
GST_DEBUG_OBJECT (v4l2object->element, "step width: %d",
|
|
size.stepwise.step_width);
|
|
GST_DEBUG_OBJECT (v4l2object->element, "step height: %d",
|
|
size.stepwise.step_height);
|
|
|
|
for (w = size.stepwise.min_width, h = size.stepwise.min_height;
|
|
w < size.stepwise.max_width && h < size.stepwise.max_height;
|
|
w += size.stepwise.step_width, h += size.stepwise.step_height) {
|
|
if (w == 0 || h == 0)
|
|
continue;
|
|
|
|
tmp =
|
|
gst_v4l2_object_probe_caps_for_format_and_size (v4l2object,
|
|
pixelformat, w, h, template);
|
|
|
|
if (tmp)
|
|
results = g_list_prepend (results, tmp);
|
|
}
|
|
GST_DEBUG_OBJECT (v4l2object->element,
|
|
"done iterating stepwise frame sizes");
|
|
} else if (size.type == V4L2_FRMSIZE_TYPE_CONTINUOUS) {
|
|
guint32 maxw, maxh;
|
|
|
|
GST_DEBUG_OBJECT (v4l2object->element, "we have continuous frame sizes:");
|
|
GST_DEBUG_OBJECT (v4l2object->element, "min width: %d",
|
|
size.stepwise.min_width);
|
|
GST_DEBUG_OBJECT (v4l2object->element, "min height: %d",
|
|
size.stepwise.min_height);
|
|
GST_DEBUG_OBJECT (v4l2object->element, "max width: %d",
|
|
size.stepwise.max_width);
|
|
GST_DEBUG_OBJECT (v4l2object->element, "min height: %d",
|
|
size.stepwise.max_height);
|
|
|
|
w = MAX (size.stepwise.min_width, 1);
|
|
h = MAX (size.stepwise.min_height, 1);
|
|
maxw = MIN (size.stepwise.max_width, G_MAXINT);
|
|
maxh = MIN (size.stepwise.max_height, G_MAXINT);
|
|
|
|
tmp =
|
|
gst_v4l2_object_probe_caps_for_format_and_size (v4l2object, pixelformat,
|
|
w, h, template);
|
|
if (tmp) {
|
|
gst_structure_set (tmp, "width", GST_TYPE_INT_RANGE, (gint) w,
|
|
(gint) maxw, "height", GST_TYPE_INT_RANGE, (gint) h, (gint) maxh,
|
|
NULL);
|
|
|
|
/* no point using the results list here, since there's only one struct */
|
|
gst_caps_append_structure (ret, tmp);
|
|
}
|
|
} else {
|
|
goto unknown_type;
|
|
}
|
|
|
|
/* we use an intermediary list to store and then sort the results of the
|
|
* probing because we can't make any assumptions about the order in which
|
|
* the driver will give us the sizes, but we want the final caps to contain
|
|
* the results starting with the highest resolution and having the lowest
|
|
* resolution last, since order in caps matters for things like fixation. */
|
|
results = g_list_sort (results, (GCompareFunc) sort_by_frame_size);
|
|
while (results != NULL) {
|
|
gst_caps_append_structure (ret, GST_STRUCTURE (results->data));
|
|
results = g_list_delete_link (results, results);
|
|
}
|
|
|
|
if (gst_caps_is_empty (ret))
|
|
goto enum_framesizes_no_results;
|
|
|
|
return ret;
|
|
|
|
/* ERRORS */
|
|
enum_framesizes_failed:
|
|
{
|
|
/* I don't see how this is actually an error */
|
|
GST_DEBUG_OBJECT (v4l2object->element,
|
|
"Failed to enumerate frame sizes for pixelformat %" GST_FOURCC_FORMAT
|
|
" (%s)", GST_FOURCC_ARGS (pixelformat), g_strerror (errno));
|
|
goto default_frame_sizes;
|
|
}
|
|
enum_framesizes_no_results:
|
|
{
|
|
/* it's possible that VIDIOC_ENUM_FRAMESIZES is defined but the driver in
|
|
* question doesn't actually support it yet */
|
|
GST_DEBUG_OBJECT (v4l2object->element,
|
|
"No results for pixelformat %" GST_FOURCC_FORMAT
|
|
" enumerating frame sizes, trying fallback",
|
|
GST_FOURCC_ARGS (pixelformat));
|
|
goto default_frame_sizes;
|
|
}
|
|
unknown_type:
|
|
{
|
|
GST_WARNING_OBJECT (v4l2object->element,
|
|
"Unknown frame sizeenum type for pixelformat %" GST_FOURCC_FORMAT
|
|
": %u", GST_FOURCC_ARGS (pixelformat), size.type);
|
|
goto default_frame_sizes;
|
|
}
|
|
default_frame_sizes:
|
|
#endif /* defined VIDIOC_ENUM_FRAMESIZES */
|
|
{
|
|
gint min_w, max_w, min_h, max_h, fix_num = 0, fix_denom = 0;
|
|
|
|
/* This code is for Linux < 2.6.19 */
|
|
min_w = min_h = 1;
|
|
max_w = max_h = GST_V4L2_MAX_SIZE;
|
|
if (!gst_v4l2_object_get_nearest_size (v4l2object, pixelformat, &min_w,
|
|
&min_h)) {
|
|
GST_WARNING_OBJECT (v4l2object->element,
|
|
"Could not probe minimum capture size for pixelformat %"
|
|
GST_FOURCC_FORMAT, GST_FOURCC_ARGS (pixelformat));
|
|
}
|
|
if (!gst_v4l2_object_get_nearest_size (v4l2object, pixelformat, &max_w,
|
|
&max_h)) {
|
|
GST_WARNING_OBJECT (v4l2object->element,
|
|
"Could not probe maximum capture size for pixelformat %"
|
|
GST_FOURCC_FORMAT, GST_FOURCC_ARGS (pixelformat));
|
|
}
|
|
|
|
/* Since we can't get framerate directly, try to use the current norm */
|
|
if (v4l2object->norm && v4l2object->norms) {
|
|
GList *norms;
|
|
GstTunerNorm *norm;
|
|
|
|
for (norms = v4l2object->norms; norms != NULL; norms = norms->next) {
|
|
norm = (GstTunerNorm *) norms->data;
|
|
if (!strcmp (norm->label, v4l2object->norm))
|
|
break;
|
|
}
|
|
/* If it's possible, set framerate to that (discrete) value */
|
|
if (norm) {
|
|
fix_num = gst_value_get_fraction_numerator (&norm->framerate);
|
|
fix_denom = gst_value_get_fraction_denominator (&norm->framerate);
|
|
}
|
|
}
|
|
|
|
tmp = gst_structure_copy (template);
|
|
if (fix_num) {
|
|
gst_structure_set (tmp, "framerate", GST_TYPE_FRACTION, fix_num,
|
|
fix_denom, NULL);
|
|
} else {
|
|
/* if norm can't be used, copy the template framerate */
|
|
gst_structure_set (tmp, "framerate", GST_TYPE_FRACTION_RANGE, 0, 1,
|
|
100, 1, NULL);
|
|
}
|
|
|
|
if (min_w == max_w)
|
|
gst_structure_set (tmp, "width", G_TYPE_INT, max_w, NULL);
|
|
else
|
|
gst_structure_set (tmp, "width", GST_TYPE_INT_RANGE, min_w, max_w, NULL);
|
|
|
|
if (min_h == max_h)
|
|
gst_structure_set (tmp, "height", G_TYPE_INT, max_h, NULL);
|
|
else
|
|
gst_structure_set (tmp, "height", GST_TYPE_INT_RANGE, min_h, max_h, NULL);
|
|
|
|
gst_caps_append_structure (ret, tmp);
|
|
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_v4l2_object_get_nearest_size (GstV4l2Object * v4l2object,
|
|
guint32 pixelformat, gint * width, gint * height)
|
|
{
|
|
struct v4l2_format fmt;
|
|
int fd;
|
|
int r;
|
|
|
|
g_return_val_if_fail (width != NULL, FALSE);
|
|
g_return_val_if_fail (height != NULL, FALSE);
|
|
|
|
GST_LOG_OBJECT (v4l2object->element,
|
|
"getting nearest size to %dx%d with format %" GST_FOURCC_FORMAT,
|
|
*width, *height, GST_FOURCC_ARGS (pixelformat));
|
|
|
|
fd = v4l2object->video_fd;
|
|
|
|
/* get size delimiters */
|
|
memset (&fmt, 0, sizeof (fmt));
|
|
fmt.type = v4l2object->type;
|
|
fmt.fmt.pix.width = *width;
|
|
fmt.fmt.pix.height = *height;
|
|
fmt.fmt.pix.pixelformat = pixelformat;
|
|
fmt.fmt.pix.field = V4L2_FIELD_INTERLACED;
|
|
|
|
r = v4l2_ioctl (fd, VIDIOC_TRY_FMT, &fmt);
|
|
if (r < 0 && errno == EINVAL) {
|
|
/* try again with progressive video */
|
|
fmt.fmt.pix.width = *width;
|
|
fmt.fmt.pix.height = *height;
|
|
fmt.fmt.pix.pixelformat = pixelformat;
|
|
fmt.fmt.pix.field = V4L2_FIELD_NONE;
|
|
r = v4l2_ioctl (fd, VIDIOC_TRY_FMT, &fmt);
|
|
}
|
|
|
|
if (r < 0) {
|
|
/* The driver might not implement TRY_FMT, in which case we will try
|
|
S_FMT to probe */
|
|
if (errno != ENOTTY)
|
|
return FALSE;
|
|
|
|
/* Only try S_FMT if we're not actively capturing yet, which we shouldn't
|
|
be, because we're still probing */
|
|
if (GST_V4L2_IS_ACTIVE (v4l2object))
|
|
return FALSE;
|
|
|
|
GST_LOG_OBJECT (v4l2object->element,
|
|
"Failed to probe size limit with VIDIOC_TRY_FMT, trying VIDIOC_S_FMT");
|
|
|
|
fmt.fmt.pix.width = *width;
|
|
fmt.fmt.pix.height = *height;
|
|
|
|
r = v4l2_ioctl (fd, VIDIOC_S_FMT, &fmt);
|
|
if (r < 0 && errno == EINVAL) {
|
|
/* try again with progressive video */
|
|
fmt.fmt.pix.width = *width;
|
|
fmt.fmt.pix.height = *height;
|
|
fmt.fmt.pix.pixelformat = pixelformat;
|
|
fmt.fmt.pix.field = V4L2_FIELD_NONE;
|
|
r = v4l2_ioctl (fd, VIDIOC_S_FMT, &fmt);
|
|
}
|
|
|
|
if (r < 0)
|
|
return FALSE;
|
|
}
|
|
|
|
GST_LOG_OBJECT (v4l2object->element,
|
|
"got nearest size %dx%d", fmt.fmt.pix.width, fmt.fmt.pix.height);
|
|
|
|
*width = fmt.fmt.pix.width;
|
|
*height = fmt.fmt.pix.height;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
gboolean
|
|
gst_v4l2_object_set_format (GstV4l2Object * v4l2object, guint32 pixelformat,
|
|
guint32 width, guint32 height)
|
|
{
|
|
gint fd = v4l2object->video_fd;
|
|
struct v4l2_format format;
|
|
|
|
GST_DEBUG_OBJECT (v4l2object->element, "Setting format to %dx%d, format "
|
|
"%" GST_FOURCC_FORMAT, width, height, GST_FOURCC_ARGS (pixelformat));
|
|
|
|
GST_V4L2_CHECK_OPEN (v4l2object);
|
|
GST_V4L2_CHECK_NOT_ACTIVE (v4l2object);
|
|
|
|
memset (&format, 0x00, sizeof (struct v4l2_format));
|
|
format.type = v4l2object->type;
|
|
|
|
if (pixelformat == GST_MAKE_FOURCC ('M', 'P', 'E', 'G'))
|
|
return TRUE;
|
|
|
|
if (v4l2_ioctl (fd, VIDIOC_G_FMT, &format) < 0)
|
|
goto get_fmt_failed;
|
|
|
|
format.type = v4l2object->type;
|
|
format.fmt.pix.width = width;
|
|
format.fmt.pix.height = height;
|
|
format.fmt.pix.pixelformat = pixelformat;
|
|
/* request whole frames; change when gstreamer supports interlaced video
|
|
* (INTERLACED mode returns frames where the fields have already been
|
|
* combined, there are other modes for requesting fields individually) */
|
|
format.fmt.pix.field = V4L2_FIELD_INTERLACED;
|
|
|
|
if (v4l2_ioctl (fd, VIDIOC_S_FMT, &format) < 0) {
|
|
if (errno != EINVAL)
|
|
goto set_fmt_failed;
|
|
|
|
GST_DEBUG_OBJECT (v4l2object->element, "trying again...");
|
|
|
|
/* try again with progressive video */
|
|
format.fmt.pix.width = width;
|
|
format.fmt.pix.height = height;
|
|
format.fmt.pix.pixelformat = pixelformat;
|
|
format.fmt.pix.field = V4L2_FIELD_NONE;
|
|
if (v4l2_ioctl (fd, VIDIOC_S_FMT, &format) < 0)
|
|
goto set_fmt_failed;
|
|
}
|
|
|
|
if (format.fmt.pix.width != width || format.fmt.pix.height != height)
|
|
goto invalid_dimensions;
|
|
|
|
if (format.fmt.pix.pixelformat != pixelformat)
|
|
goto invalid_pixelformat;
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
get_fmt_failed:
|
|
{
|
|
GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS,
|
|
(_("Device '%s' does not support video capture"),
|
|
v4l2object->videodev),
|
|
("Call to G_FMT failed: (%s)", g_strerror (errno)));
|
|
return FALSE;
|
|
}
|
|
set_fmt_failed:
|
|
{
|
|
GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS,
|
|
(_("Device '%s' cannot capture at %dx%d"),
|
|
v4l2object->videodev, width, height),
|
|
("Call to S_FMT failed for %" GST_FOURCC_FORMAT " @ %dx%d: %s",
|
|
GST_FOURCC_ARGS (pixelformat), width, height, g_strerror (errno)));
|
|
return FALSE;
|
|
}
|
|
invalid_dimensions:
|
|
{
|
|
GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS,
|
|
(_("Device '%s' cannot capture at %dx%d"),
|
|
v4l2object->videodev, width, height),
|
|
("Tried to capture at %dx%d, but device returned size %dx%d",
|
|
width, height, format.fmt.pix.width, format.fmt.pix.height));
|
|
return FALSE;
|
|
}
|
|
invalid_pixelformat:
|
|
{
|
|
GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS,
|
|
(_("Device '%s' cannot capture in the specified format"),
|
|
v4l2object->videodev),
|
|
("Tried to capture in %" GST_FOURCC_FORMAT
|
|
", but device returned format" " %" GST_FOURCC_FORMAT,
|
|
GST_FOURCC_ARGS (pixelformat),
|
|
GST_FOURCC_ARGS (format.fmt.pix.pixelformat)));
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
gboolean
|
|
gst_v4l2_object_start_streaming (GstV4l2Object * v4l2object)
|
|
{
|
|
if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_STREAMON,
|
|
&(v4l2object->type)) < 0) {
|
|
GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, OPEN_READ,
|
|
(_("Error starting streaming on device '%s'."), v4l2object->videodev),
|
|
GST_ERROR_SYSTEM);
|
|
return FALSE;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
gboolean
|
|
gst_v4l2_object_stop_streaming (GstV4l2Object * v4l2object)
|
|
{
|
|
if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_STREAMOFF,
|
|
&(v4l2object->type)) < 0) {
|
|
GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, OPEN_READ,
|
|
(_("Error stopping streaming on device '%s'."), v4l2object->videodev),
|
|
GST_ERROR_SYSTEM);
|
|
return FALSE;
|
|
}
|
|
return TRUE;
|
|
}
|