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-rw-r--r--sys/v4l2/gstv4l2element.c493
1 files changed, 493 insertions, 0 deletions
diff --git a/sys/v4l2/gstv4l2element.c b/sys/v4l2/gstv4l2element.c
new file mode 100644
index 00000000..2ab68a38
--- /dev/null
+++ b/sys/v4l2/gstv4l2element.c
@@ -0,0 +1,493 @@
+/* G-Streamer generic V4L2 element
+ * Copyright (C) 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 "v4l2_calls.h"
+
+
+static GstElementDetails gst_v4l2element_details = {
+ "Generic video4linux2 Element",
+ "None/Video",
+ "Generic plugin for handling common video4linux2 calls",
+ VERSION,
+ "Ronald Bultje <rbultje@ronald.bitfreak.net>",
+ "(C) 2002",
+};
+
+/* V4l2Element signals and args */
+enum {
+ /* FILL ME */
+ LAST_SIGNAL
+};
+
+enum {
+ ARG_0,
+ ARG_CHANNEL,
+ ARG_CHANNEL_NAMES,
+ ARG_OUTPUT,
+ ARG_OUTPUT_NAMES,
+ ARG_NORM,
+ ARG_NORM_NAMES,
+ ARG_HAS_TUNER,
+ ARG_FREQUENCY,
+ ARG_SIGNAL_STRENGTH,
+ ARG_HAS_AUDIO,
+ ARG_ATTRIBUTE,
+ ARG_ATTRIBUTE_SETS,
+ ARG_DEVICE,
+ ARG_DEVICE_NAME,
+ ARG_DEVICE_HAS_CAPTURE,
+ ARG_DEVICE_HAS_OVERLAY,
+ ARG_DEVICE_HAS_CODEC,
+ ARG_DISPLAY,
+ ARG_VIDEOWINDOW,
+ ARG_CLIPPING,
+ ARG_DO_OVERLAY,
+};
+
+
+static void gst_v4l2element_class_init (GstV4l2ElementClass *klass);
+static void gst_v4l2element_init (GstV4l2Element *v4lelement);
+static void gst_v4l2element_set_property (GObject *object,
+ guint prop_id,
+ const GValue *value,
+ GParamSpec *pspec);
+static void gst_v4l2element_get_property (GObject *object,
+ guint prop_id,
+ GValue *value,
+ GParamSpec *pspec);
+static GstElementStateReturn gst_v4l2element_change_state (GstElement *element);
+
+
+static GstElementClass *parent_class = NULL;
+/*static guint gst_v4l2element_signals[LAST_SIGNAL] = { 0 }; */
+
+
+GType
+gst_v4l2element_get_type (void)
+{
+ static GType v4l2element_type = 0;
+
+ if (!v4l2element_type) {
+ static const GTypeInfo v4l2element_info = {
+ sizeof(GstV4l2ElementClass),
+ NULL,
+ NULL,
+ (GClassInitFunc) gst_v4l2element_class_init,
+ NULL,
+ NULL,
+ sizeof(GstV4l2Element),
+ 0,
+ (GInstanceInitFunc) gst_v4l2element_init,
+ NULL
+ };
+ v4l2element_type = g_type_register_static(GST_TYPE_ELEMENT,
+ "GstV4l2Element", &v4l2element_info, 0);
+ }
+ return v4l2element_type;
+}
+
+
+
+static void
+gst_v4l2element_class_init (GstV4l2ElementClass *klass)
+{
+ GObjectClass *gobject_class;
+ GstElementClass *gstelement_class;
+
+ gobject_class = (GObjectClass*)klass;
+ gstelement_class = (GstElementClass*)klass;
+
+ parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
+
+ g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_CHANNEL,
+ g_param_spec_int("channel","channel","channel",
+ G_MININT,G_MAXINT,0,G_PARAM_READWRITE));
+ g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_CHANNEL_NAMES,
+ g_param_spec_pointer("channel_names","channel_names","channel_names",
+ G_PARAM_READABLE));
+ g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_OUTPUT,
+ g_param_spec_int("output","output","output",
+ G_MININT,G_MAXINT,0,G_PARAM_READWRITE));
+ g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_OUTPUT_NAMES,
+ g_param_spec_pointer("output_names","output_names","output_names",
+ G_PARAM_READABLE));
+ g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_NORM,
+ g_param_spec_int("norm","norm","norm",
+ G_MININT,G_MAXINT,0,G_PARAM_READWRITE));
+ g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_NORM_NAMES,
+ g_param_spec_pointer("norm_names","norm_names","norm_names",
+ G_PARAM_READABLE));
+
+ g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_HAS_TUNER,
+ g_param_spec_boolean("has_tuner","has_tuner","has_tuner",
+ 0,G_PARAM_READABLE));
+ g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_FREQUENCY,
+ g_param_spec_ulong("frequency","frequency","frequency",
+ 0,G_MAXULONG,0,G_PARAM_READWRITE));
+ g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_SIGNAL_STRENGTH,
+ g_param_spec_ulong("signal_strength","signal_strength","signal_strength",
+ 0,G_MAXULONG,0,G_PARAM_READABLE));
+
+ g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_HAS_AUDIO,
+ g_param_spec_boolean("has_audio","has_audio","has_audio",
+ 0,G_PARAM_READABLE));
+ g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_ATTRIBUTE,
+ g_param_spec_pointer("attribute","attribute","attribute",
+ G_PARAM_READWRITE));
+ g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_ATTRIBUTE_SETS,
+ g_param_spec_pointer("attribute_sets","attribute_sets","attribute_sets",
+ G_PARAM_READABLE));
+
+ g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_DEVICE,
+ g_param_spec_string("device","device","device",
+ NULL, G_PARAM_READWRITE));
+ g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_DEVICE_NAME,
+ g_param_spec_string("device_name","device_name","device_name",
+ NULL, G_PARAM_READABLE));
+
+ g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_DEVICE_HAS_CAPTURE,
+ g_param_spec_boolean("can_capture","can_capture","can_capture",
+ 0,G_PARAM_READABLE));
+ g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_DEVICE_HAS_OVERLAY,
+ g_param_spec_boolean("has_overlay","has_overlay","has_overlay",
+ 0,G_PARAM_READABLE));
+ g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_DEVICE_HAS_CODEC,
+ g_param_spec_boolean("has_compression","has_compression","has_compression",
+ 0,G_PARAM_READABLE));
+
+ g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_DISPLAY,
+ g_param_spec_string("display","display","display",
+ NULL, G_PARAM_WRITABLE));
+ g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_DO_OVERLAY,
+ g_param_spec_boolean("do_overlay","do_overlay","do_overlay",
+ 0,G_PARAM_WRITABLE));
+ g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_VIDEOWINDOW,
+ g_param_spec_pointer("videowindow","videowindow","videowindow",
+ G_PARAM_WRITABLE));
+ g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_CLIPPING,
+ g_param_spec_pointer("videowindowclip","videowindowclip","videowindowclip",
+ G_PARAM_WRITABLE));
+
+ gobject_class->set_property = gst_v4l2element_set_property;
+ gobject_class->get_property = gst_v4l2element_get_property;
+
+ gstelement_class->change_state = gst_v4l2element_change_state;
+}
+
+
+static void
+gst_v4l2element_init (GstV4l2Element *v4l2element)
+{
+ /* some default values */
+ v4l2element->video_fd = -1;
+ v4l2element->buffer = NULL;
+ v4l2element->device = NULL;
+
+ v4l2element->norm = -1;
+ v4l2element->channel = -1;
+ v4l2element->output = -1;
+ v4l2element->frequency = 0;
+
+ v4l2element->controls = NULL;
+ v4l2element->formats = NULL;
+ v4l2element->outputs = NULL;
+ v4l2element->inputs = NULL;
+ v4l2element->norms = NULL;
+}
+
+
+static void
+gst_v4l2element_set_property (GObject *object,
+ guint prop_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ GstV4l2Element *v4l2element;
+
+ /* it's not null if we got it, but it might not be ours */
+ g_return_if_fail(GST_IS_V4L2ELEMENT(object));
+ v4l2element = GST_V4L2ELEMENT(object);
+
+ switch (prop_id) {
+ case ARG_CHANNEL:
+ v4l2element->channel = g_value_get_int(value);
+ if (GST_V4L2_IS_OPEN(v4l2element) && !GST_V4L2_IS_ACTIVE(v4l2element)) {
+ if (!gst_v4l2_set_input(v4l2element, g_value_get_int(value)))
+ return;
+ }
+ break;
+ case ARG_OUTPUT:
+ v4l2element->output = g_value_get_int(value);
+ if (GST_V4L2_IS_OPEN(v4l2element) && !GST_V4L2_IS_ACTIVE(v4l2element)) {
+ if (!gst_v4l2_set_output(v4l2element, g_value_get_int(value)))
+ return;
+ }
+ break;
+ case ARG_NORM:
+ v4l2element->norm = g_value_get_int(value);
+ if (GST_V4L2_IS_OPEN(v4l2element) && !GST_V4L2_IS_ACTIVE(v4l2element)) {
+ if (!gst_v4l2_set_norm(v4l2element, g_value_get_int(value)))
+ return;
+ }
+ break;
+ case ARG_FREQUENCY:
+ v4l2element->frequency = g_value_get_ulong(value);
+ if (GST_V4L2_IS_OPEN(v4l2element) && !GST_V4L2_IS_ACTIVE(v4l2element)) {
+ if (!gst_v4l2_set_frequency(v4l2element, g_value_get_ulong(value)))
+ return;
+ }
+ break;
+ case ARG_ATTRIBUTE:
+ if (GST_V4L2_IS_OPEN(v4l2element)) {
+ gst_v4l2_set_attribute(v4l2element,
+ ((GstV4l2Attribute*)g_value_get_pointer(value))->index,
+ ((GstV4l2Attribute*)g_value_get_pointer(value))->value);
+ }
+ break;
+ case ARG_DEVICE:
+ if (!GST_V4L2_IS_OPEN(v4l2element)) {
+ if (v4l2element->device)
+ g_free(v4l2element->device);
+ v4l2element->device = g_strdup(g_value_get_string(value));
+ }
+ break;
+ case ARG_DISPLAY:
+ if (!gst_v4l2_set_display(v4l2element, g_value_get_string(value)))
+ return;
+ break;
+ case ARG_VIDEOWINDOW:
+ if (GST_V4L2_IS_OPEN(v4l2element)) {
+ gst_v4l2_set_window(v4l2element,
+ ((GstV4l2Rect*)g_value_get_pointer(value))->x,
+ ((GstV4l2Rect*)g_value_get_pointer(value))->y,
+ ((GstV4l2Rect*)g_value_get_pointer(value))->w,
+ ((GstV4l2Rect*)g_value_get_pointer(value))->h);
+ }
+ break;
+ case ARG_CLIPPING:
+ if (GST_V4L2_IS_OPEN(v4l2element)) {
+ gint i;
+ struct v4l2_clip *clips;
+ GList *list = (GList*)g_value_get_pointer(value);
+ clips = g_malloc(sizeof(struct v4l2_clip) * g_list_length(list));
+ for (i=0;i<g_list_length(list);i++)
+ {
+ clips[i].x = ((GstV4l2Rect*)g_list_nth_data(list, i))->x;
+ clips[i].y = ((GstV4l2Rect*)g_list_nth_data(list, i))->y;
+ clips[i].width = ((GstV4l2Rect*)g_list_nth_data(list, i))->w;
+ clips[i].height = ((GstV4l2Rect*)g_list_nth_data(list, i))->h;
+ }
+ gst_v4l2_set_clips(v4l2element, clips, g_list_length(list));
+ g_free(clips);
+ }
+ break;
+ case ARG_DO_OVERLAY:
+ if (GST_V4L2_IS_OPEN(v4l2element)) {
+ if (!gst_v4l2_enable_overlay(v4l2element, g_value_get_boolean(value)))
+ return;
+ }
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+
+static void
+gst_v4l2element_get_property (GObject *object,
+ guint prop_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ GstV4l2Element *v4l2element;
+ gint temp_i = 0;
+ gulong temp_ul = 0;
+ GList *list = NULL;
+
+ /* it's not null if we got it, but it might not be ours */
+ g_return_if_fail(GST_IS_V4L2ELEMENT(object));
+ v4l2element = GST_V4L2ELEMENT(object);
+
+ switch (prop_id) {
+ case ARG_CHANNEL:
+ if (GST_V4L2_IS_OPEN(v4l2element))
+ gst_v4l2_get_input(v4l2element, &temp_i);
+ g_value_set_int(value, temp_i);
+ break;
+ case ARG_CHANNEL_NAMES:
+ if (GST_V4L2_IS_OPEN(v4l2element))
+ list = gst_v4l2_get_input_names(v4l2element);
+ g_value_set_pointer(value, list);
+ break;
+ case ARG_OUTPUT:
+ if (GST_V4L2_IS_OPEN(v4l2element))
+ gst_v4l2_get_output(v4l2element, &temp_i);
+ g_value_set_int(value, temp_i);
+ break;
+ case ARG_OUTPUT_NAMES:
+ if (GST_V4L2_IS_OPEN(v4l2element))
+ list = gst_v4l2_get_output_names(v4l2element);
+ g_value_set_pointer(value, list);
+ break;
+ case ARG_NORM:
+ if (GST_V4L2_IS_OPEN(v4l2element))
+ gst_v4l2_get_norm(v4l2element, &temp_i);
+ g_value_set_int(value, temp_i);
+ break;
+ case ARG_NORM_NAMES:
+ if (GST_V4L2_IS_OPEN(v4l2element))
+ list = gst_v4l2_get_norm_names(v4l2element);
+ g_value_set_pointer(value, list);
+ break;
+ case ARG_HAS_TUNER:
+ if (GST_V4L2_IS_OPEN(v4l2element))
+ temp_i = gst_v4l2_has_tuner(v4l2element);
+ g_value_set_boolean(value, temp_i>0?TRUE:FALSE);
+ break;
+ case ARG_FREQUENCY:
+ if (GST_V4L2_IS_OPEN(v4l2element))
+ gst_v4l2_get_frequency(v4l2element, &temp_ul);
+ g_value_set_ulong(value, temp_ul);
+ break;
+ case ARG_SIGNAL_STRENGTH:
+ if (GST_V4L2_IS_OPEN(v4l2element))
+ gst_v4l2_signal_strength(v4l2element, &temp_ul);
+ g_value_set_ulong(value, temp_ul);
+ break;
+ case ARG_HAS_AUDIO:
+ if (GST_V4L2_IS_OPEN(v4l2element))
+ temp_i = gst_v4l2_has_audio(v4l2element);
+ g_value_set_boolean(value, temp_i>0?TRUE:FALSE);
+ break;
+ case ARG_ATTRIBUTE:
+ if (GST_V4L2_IS_OPEN(v4l2element))
+ gst_v4l2_get_attribute(v4l2element,
+ ((GstV4l2Attribute*)g_value_get_pointer(value))->index, &temp_i);
+ ((GstV4l2Attribute*)g_value_get_pointer(value))->value = temp_i;
+ break;
+ case ARG_ATTRIBUTE_SETS:
+ if (GST_V4L2_IS_OPEN(v4l2element))
+ list = gst_v4l2_get_attributes(v4l2element);
+ g_value_set_pointer(value, list);
+ break;
+ case ARG_DEVICE:
+ g_value_set_string(value, g_strdup(v4l2element->device));
+ break;
+ case ARG_DEVICE_NAME:
+ if (GST_V4L2_IS_OPEN(v4l2element))
+ g_value_set_string(value, g_strdup(v4l2element->vcap.name));
+ break;
+ case ARG_DEVICE_HAS_CAPTURE:
+ if (GST_V4L2_IS_OPEN(v4l2element) &&
+ (v4l2element->vcap.type == V4L2_TYPE_CODEC ||
+ v4l2element->vcap.type == V4L2_TYPE_CAPTURE) &&
+ v4l2element->vcap.flags & V4L2_FLAG_STREAMING)
+ temp_i = 1;
+ g_value_set_boolean(value, temp_i>0?TRUE:FALSE);
+ break;
+ case ARG_DEVICE_HAS_OVERLAY:
+ if (GST_V4L2_IS_OPEN(v4l2element) &&
+ v4l2element->vcap.flags & V4L2_FLAG_PREVIEW)
+ temp_i = 1;
+ g_value_set_boolean(value, temp_i>0?TRUE:FALSE);
+ break;
+ case ARG_DEVICE_HAS_CODEC:
+ if (GST_V4L2_IS_OPEN(v4l2element) &&
+ v4l2element->vcap.type == V4L2_TYPE_CODEC)
+ temp_i = 1;
+ g_value_set_boolean(value, temp_i>0?TRUE:FALSE);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
+ break;
+ }
+}
+
+
+static GstElementStateReturn
+gst_v4l2element_change_state (GstElement *element)
+{
+ GstV4l2Element *v4l2element;
+
+ g_return_val_if_fail(GST_IS_V4L2ELEMENT(element), GST_STATE_FAILURE);
+
+ v4l2element = GST_V4L2ELEMENT(element);
+
+ /* if going down into NULL state, close the device if it's open
+ * if going to READY, open the device (and set some options)
+ */
+ switch (GST_STATE_TRANSITION(element)) {
+ case GST_STATE_NULL_TO_READY:
+ if (!gst_v4l2_open(v4l2element))
+ return GST_STATE_FAILURE;
+
+ /* now, sync options */
+ if (v4l2element->norm >= 0)
+ if (!gst_v4l2_set_norm(v4l2element, v4l2element->norm))
+ return GST_STATE_FAILURE;
+ if (v4l2element->channel >= 0)
+ if (!gst_v4l2_set_input(v4l2element, v4l2element->channel))
+ return GST_STATE_FAILURE;
+ if (v4l2element->output >= 0)
+ if (!gst_v4l2_set_output(v4l2element, v4l2element->output))
+ return GST_STATE_FAILURE;
+ if (v4l2element->frequency > 0)
+ if (!gst_v4l2_set_frequency(v4l2element, v4l2element->frequency))
+ return GST_STATE_FAILURE;
+ break;
+ case GST_STATE_READY_TO_NULL:
+ if (!gst_v4l2_close(v4l2element))
+ return GST_STATE_FAILURE;
+ break;
+ }
+
+ if (GST_ELEMENT_CLASS(parent_class)->change_state)
+ return GST_ELEMENT_CLASS(parent_class)->change_state(element);
+
+ return GST_STATE_SUCCESS;
+}
+
+
+static gboolean
+plugin_init (GModule *module,
+ GstPlugin *plugin)
+{
+ GstElementFactory *factory;
+
+ /* create an elementfactory for the v4l2element */
+ factory = gst_element_factory_new("v4l2element", GST_TYPE_V4L2ELEMENT,
+ &gst_v4l2element_details);
+ g_return_val_if_fail(factory != NULL, FALSE);
+ gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
+
+ return TRUE;
+}
+
+
+GstPluginDesc plugin_desc = {
+ GST_VERSION_MAJOR,
+ GST_VERSION_MINOR,
+ "v4l2element",
+ plugin_init
+};