--- /dev/null
+/* GStreamer
+ *
+ * gstv4lelement.c: base class for V4L elements
+ *
+ * Copyright (C) 2001-2002 Ronald Bultje <rbultje@ronald.bitfreak.net>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <unistd.h>
+#include <string.h>
+
+#include <gst/interfaces/propertyprobe.h>
+
+#ifdef HAVE_GUDEV
+#include <gudev/gudev.h>
+#endif
+
+#include "v4l_calls.h"
+#include "gstv4ltuner.h"
+#ifdef HAVE_XVIDEO
+#include "gstv4lxoverlay.h"
+#endif
+#include "gstv4lcolorbalance.h"
+
+
+enum
+{
+ PROP_0,
+ PROP_DEVICE,
+ PROP_DEVICE_NAME,
+ PROP_FLAGS
+};
+
+GST_DEBUG_CATEGORY (v4lelement_debug);
+#define GST_CAT_DEFAULT v4lelement_debug
+
+static void gst_v4lelement_init_interfaces (GType type);
+
+GST_BOILERPLATE_FULL (GstV4lElement, gst_v4lelement, GstPushSrc,
+ GST_TYPE_PUSH_SRC, gst_v4lelement_init_interfaces);
+
+static void gst_v4lelement_dispose (GObject * object);
+static void gst_v4lelement_set_property (GObject * object,
+ guint prop_id, const GValue * value, GParamSpec * pspec);
+static void gst_v4lelement_get_property (GObject * object,
+ guint prop_id, GValue * value, GParamSpec * pspec);
+
+/* element methods */
+static GstStateChangeReturn gst_v4lelement_change_state (GstElement * element,
+ GstStateChange transition);
+
+static gboolean
+gst_v4l_iface_supported (GstImplementsInterface * iface, GType iface_type)
+{
+ GstV4lElement *v4lelement = GST_V4LELEMENT (iface);
+
+#ifdef HAVE_XVIDEO
+ g_assert (iface_type == GST_TYPE_TUNER ||
+ iface_type == GST_TYPE_X_OVERLAY || iface_type == GST_TYPE_COLOR_BALANCE);
+#else
+ g_assert (iface_type == GST_TYPE_TUNER ||
+ iface_type == GST_TYPE_COLOR_BALANCE);
+#endif
+
+ if (v4lelement->video_fd == -1)
+ return FALSE;
+
+#ifdef HAVE_XVIDEO
+ if (iface_type == GST_TYPE_X_OVERLAY && !GST_V4L_IS_OVERLAY (v4lelement))
+ return FALSE;
+#endif
+
+ return TRUE;
+}
+
+static void
+gst_v4l_interface_init (GstImplementsInterfaceClass * klass)
+{
+ /* default virtual functions */
+ klass->supported = gst_v4l_iface_supported;
+}
+
+static const GList *
+gst_v4l_probe_get_properties (GstPropertyProbe * probe)
+{
+ GObjectClass *klass = G_OBJECT_GET_CLASS (probe);
+ static GList *list = NULL;
+
+ if (!list) {
+ list = g_list_append (NULL, g_object_class_find_property (klass, "device"));
+ }
+
+ return list;
+}
+
+static gboolean init = FALSE;
+static GList *devices = NULL;
+
+#ifdef HAVE_GUDEV
+static gboolean
+gst_v4l_class_probe_devices_with_udev (GstV4lElementClass * klass,
+ gboolean check)
+{
+ GUdevClient *client = NULL;
+ GList *item;
+
+ if (!check) {
+ while (devices) {
+ gchar *device = devices->data;
+ devices = g_list_remove (devices, device);
+ g_free (device);
+ }
+
+ GST_INFO ("Enumerating video4linux devices from udev");
+ client = g_udev_client_new (NULL);
+ if (!client) {
+ GST_WARNING ("Failed to initialize gudev client");
+ goto finish;
+ }
+
+ item = g_udev_client_query_by_subsystem (client, "video4linux");
+ while (item) {
+ GUdevDevice *device = item->data;
+ gchar *devnode = g_strdup (g_udev_device_get_device_file (device));
+ gint api = g_udev_device_get_property_as_int (device, "ID_V4L_VERSION");
+ GST_INFO ("Found new device: %s, API: %d", devnode, api);
+ /* Append v4l1 devices only. If api is 0 probably v4l_id has
+ been stripped out of the current udev installation, append
+ anyway */
+ if (api == 0) {
+ GST_WARNING
+ ("Couldn't retrieve ID_V4L_VERSION, silly udev installation?");
+ }
+ if ((api == 1 || api == 0)) {
+ devices = g_list_append (devices, devnode);
+ } else {
+ g_free (devnode);
+ }
+ g_object_unref (device);
+ item = item->next;
+ }
+ g_list_free (item);
+ init = TRUE;
+ }
+
+finish:
+ if (client) {
+ g_object_unref (client);
+ }
+
+ klass->devices = devices;
+
+ return init;
+}
+#endif /* HAVE_GUDEV */
+
+static gboolean
+gst_v4l_class_probe_devices (GstV4lElementClass * klass, gboolean check)
+{
+ if (!check) {
+ const gchar *dev_base[] = { "/dev/video", "/dev/v4l/video", NULL };
+ gint base, n, fd;
+
+ while (devices) {
+ gchar *device = devices->data;
+ devices = g_list_remove (devices, device);
+ g_free (device);
+ }
+
+ /* detect /dev entries */
+ for (n = 0; n < 64; n++) {
+ for (base = 0; dev_base[base] != NULL; base++) {
+ struct stat s;
+ gchar *device = g_strdup_printf ("%s%d", dev_base[base], n);
+
+ /* does the /dev/ entry exist at all? */
+ if (stat (device, &s) == 0) {
+ /* yes: is a device attached? */
+ if ((fd = open (device, O_RDONLY)) > 0 || errno == EBUSY) {
+ if (fd > 0)
+ close (fd);
+
+ devices = g_list_append (devices, device);
+ break;
+ }
+ }
+ g_free (device);
+ }
+ }
+
+ init = TRUE;
+ }
+
+ klass->devices = devices;
+
+ return init;
+}
+
+static void
+gst_v4l_probe_probe_property (GstPropertyProbe * probe,
+ guint prop_id, const GParamSpec * pspec)
+{
+ GstV4lElementClass *klass = GST_V4LELEMENT_GET_CLASS (probe);
+
+ switch (prop_id) {
+ case PROP_DEVICE:
+#ifdef HAVE_GUDEV
+ if (!gst_v4l_class_probe_devices_with_udev (klass, FALSE))
+ gst_v4l_class_probe_devices (klass, FALSE);
+#else /* !HAVE_GUDEV */
+ gst_v4l_class_probe_devices (klass, FALSE);
+#endif /* HAVE_GUDEV */
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (probe, prop_id, pspec);
+ break;
+ }
+}
+
+static gboolean
+gst_v4l_probe_needs_probe (GstPropertyProbe * probe,
+ guint prop_id, const GParamSpec * pspec)
+{
+ GstV4lElementClass *klass = GST_V4LELEMENT_GET_CLASS (probe);
+ gboolean ret = FALSE;
+
+ switch (prop_id) {
+ case PROP_DEVICE:
+#ifdef HAVE_GUDEV
+ ret = !gst_v4l_class_probe_devices_with_udev (klass, FALSE);
+#else /* !HAVE_GUDEV */
+ ret = !gst_v4l_class_probe_devices (klass, TRUE);
+#endif /* HAVE_GUDEV */
+ ret = !gst_v4l_class_probe_devices (klass, TRUE);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (probe, prop_id, pspec);
+ break;
+ }
+
+ return ret;
+}
+
+static GValueArray *
+gst_v4l_class_list_devices (GstV4lElementClass * klass)
+{
+ GValueArray *array;
+ GValue value = { 0 };
+ GList *item;
+
+ if (!klass->devices)
+ return NULL;
+
+ array = g_value_array_new (g_list_length (klass->devices));
+ item = klass->devices;
+ g_value_init (&value, G_TYPE_STRING);
+ while (item) {
+ gchar *device = item->data;
+
+ g_value_set_string (&value, device);
+ g_value_array_append (array, &value);
+
+ item = item->next;
+ }
+ g_value_unset (&value);
+
+ return array;
+}
+
+static GValueArray *
+gst_v4l_probe_get_values (GstPropertyProbe * probe,
+ guint prop_id, const GParamSpec * pspec)
+{
+ GstV4lElementClass *klass = GST_V4LELEMENT_GET_CLASS (probe);
+ GValueArray *array = NULL;
+
+ switch (prop_id) {
+ case PROP_DEVICE:
+ array = gst_v4l_class_list_devices (klass);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (probe, prop_id, pspec);
+ break;
+ }
+
+ return array;
+}
+
+static void
+gst_v4l_property_probe_interface_init (GstPropertyProbeInterface * iface)
+{
+ iface->get_properties = gst_v4l_probe_get_properties;
+ iface->probe_property = gst_v4l_probe_probe_property;
+ iface->needs_probe = gst_v4l_probe_needs_probe;
+ iface->get_values = gst_v4l_probe_get_values;
+}
+
+#define GST_TYPE_V4L_DEVICE_FLAGS (gst_v4l_device_get_type ())
+static GType
+gst_v4l_device_get_type (void)
+{
+ static GType v4l_device_type = 0;
+
+ if (v4l_device_type == 0) {
+ static const GFlagsValue values[] = {
+ {VID_TYPE_CAPTURE, "CAPTURE", "Device can capture"},
+ {VID_TYPE_TUNER, "TUNER", "Device has a tuner"},
+ {VID_TYPE_OVERLAY, "OVERLAY", "Device can do overlay"},
+ {VID_TYPE_MPEG_DECODER, "MPEG_DECODER", "Device can decode MPEG"},
+ {VID_TYPE_MPEG_ENCODER, "MPEG_ENCODER", "Device can encode MPEG"},
+ {VID_TYPE_MJPEG_DECODER, "MJPEG_DECODER", "Device can decode MJPEG"},
+ {VID_TYPE_MJPEG_ENCODER, "MJPEG_ENCODER", "Device can encode MJPEG"},
+ {0x10000, "AUDIO", "Device handles audio"},
+ {0, NULL, NULL}
+ };
+
+ v4l_device_type = g_flags_register_static ("GstV4lDeviceTypeFlags", values);
+ }
+
+ return v4l_device_type;
+}
+
+static void
+gst_v4lelement_init_interfaces (GType type)
+{
+ static const GInterfaceInfo v4liface_info = {
+ (GInterfaceInitFunc) gst_v4l_interface_init,
+ NULL,
+ NULL,
+ };
+ static const GInterfaceInfo v4l_tuner_info = {
+ (GInterfaceInitFunc) gst_v4l_tuner_interface_init,
+ NULL,
+ NULL,
+ };
+#ifdef HAVE_XVIDEO
+ static const GInterfaceInfo v4l_xoverlay_info = {
+ (GInterfaceInitFunc) gst_v4l_xoverlay_interface_init,
+ NULL,
+ NULL,
+ };
+#endif
+ static const GInterfaceInfo v4l_colorbalance_info = {
+ (GInterfaceInitFunc) gst_v4l_color_balance_interface_init,
+ NULL,
+ NULL,
+ };
+ static const GInterfaceInfo v4l_propertyprobe_info = {
+ (GInterfaceInitFunc) gst_v4l_property_probe_interface_init,
+ NULL,
+ NULL,
+ };
+
+ g_type_add_interface_static (type,
+ GST_TYPE_IMPLEMENTS_INTERFACE, &v4liface_info);
+ g_type_add_interface_static (type, GST_TYPE_TUNER, &v4l_tuner_info);
+#ifdef HAVE_XVIDEO
+ g_type_add_interface_static (type, GST_TYPE_X_OVERLAY, &v4l_xoverlay_info);
+#endif
+ g_type_add_interface_static (type,
+ GST_TYPE_COLOR_BALANCE, &v4l_colorbalance_info);
+ g_type_add_interface_static (type,
+ GST_TYPE_PROPERTY_PROBE, &v4l_propertyprobe_info);
+}
+
+
+static void
+gst_v4lelement_base_init (gpointer g_class)
+{
+ GstV4lElementClass *klass = GST_V4LELEMENT_CLASS (g_class);
+
+ klass->devices = NULL;
+
+ GST_DEBUG_CATEGORY_INIT (v4lelement_debug, "v4lelement", 0,
+ "V4L Base Class debug");
+}
+
+static void
+gst_v4lelement_class_init (GstV4lElementClass * klass)
+{
+ GObjectClass *gobject_class;
+ GstElementClass *element_class;
+
+ gobject_class = (GObjectClass *) klass;
+ element_class = GST_ELEMENT_CLASS (klass);
+
+ gobject_class->set_property = gst_v4lelement_set_property;
+ gobject_class->get_property = gst_v4lelement_get_property;
+ gobject_class->dispose = gst_v4lelement_dispose;
+
+ element_class->change_state = gst_v4lelement_change_state;
+
+ g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_DEVICE,
+ g_param_spec_string ("device", "Device", "Device location",
+ NULL, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+ g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_DEVICE_NAME,
+ g_param_spec_string ("device-name", "Device name", "Name of the device",
+ NULL, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
+ g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_FLAGS,
+ g_param_spec_flags ("flags", "Flags", "Device type flags",
+ GST_TYPE_V4L_DEVICE_FLAGS, 0,
+ G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
+
+}
+
+
+static void
+gst_v4lelement_init (GstV4lElement * v4lelement, GstV4lElementClass * klass)
+{
+ /* some default values */
+ v4lelement->video_fd = -1;
+ v4lelement->buffer = NULL;
+ v4lelement->videodev = g_strdup ("/dev/video0");
+
+ v4lelement->norms = NULL;
+ v4lelement->channels = NULL;
+ v4lelement->colors = NULL;
+
+ v4lelement->xwindow_id = 0;
+}
+
+
+static void
+gst_v4lelement_dispose (GObject * object)
+{
+ GstV4lElement *v4lelement = GST_V4LELEMENT (object);
+
+ if (v4lelement->videodev) {
+ g_free (v4lelement->videodev);
+ v4lelement->videodev = NULL;
+ }
+
+ if (((GObjectClass *) parent_class)->dispose)
+ ((GObjectClass *) parent_class)->dispose (object);
+}
+
+
+static void
+gst_v4lelement_set_property (GObject * object,
+ guint prop_id, const GValue * value, GParamSpec * pspec)
+{
+ GstV4lElement *v4lelement = GST_V4LELEMENT (object);
+
+ switch (prop_id) {
+ case PROP_DEVICE:
+ if (v4lelement->videodev)
+ g_free (v4lelement->videodev);
+ v4lelement->videodev = g_strdup (g_value_get_string (value));
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+
+static void
+gst_v4lelement_get_property (GObject * object,
+ guint prop_id, GValue * value, GParamSpec * pspec)
+{
+ GstV4lElement *v4lelement = GST_V4LELEMENT (object);
+
+ switch (prop_id) {
+ case PROP_DEVICE:
+ g_value_set_string (value, v4lelement->videodev);
+ break;
+ case PROP_DEVICE_NAME:{
+ gchar *new = NULL;
+
+ if (GST_V4L_IS_OPEN (v4lelement)) {
+ new = v4lelement->vcap.name;
+ } else if (gst_v4l_open (v4lelement)) {
+ new = v4lelement->vcap.name;
+ gst_v4l_close (v4lelement);
+ }
+ g_value_set_string (value, new);
+ break;
+ }
+ case PROP_FLAGS:{
+ guint flags = 0;
+
+ if (GST_V4L_IS_OPEN (v4lelement)) {
+ flags |= v4lelement->vcap.type & 0x3C0B;
+ if (v4lelement->vcap.audios)
+ flags |= 0x10000;
+ }
+ g_value_set_flags (value, flags);
+ break;
+ }
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static GstStateChangeReturn
+gst_v4lelement_change_state (GstElement * element, GstStateChange transition)
+{
+ GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
+ GstV4lElement *v4lelement = GST_V4LELEMENT (element);
+
+ switch (transition) {
+ case GST_STATE_CHANGE_NULL_TO_READY:
+ /* open the device */
+ if (!gst_v4l_open (v4lelement))
+ return GST_STATE_CHANGE_FAILURE;
+#ifdef HAVE_XVIDEO
+ gst_v4l_xoverlay_start (v4lelement);
+#endif
+ break;
+ default:
+ break;
+ }
+
+ ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
+
+ switch (transition) {
+ case GST_STATE_CHANGE_READY_TO_NULL:
+ /* close the device */
+#ifdef HAVE_XVIDEO
+ gst_v4l_xoverlay_stop (v4lelement);
+#endif
+ if (!gst_v4l_close (v4lelement))
+ return GST_STATE_CHANGE_FAILURE;
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
projects / mafwsubrenderer / blobdiff