/* G-Streamer generic V4L2 element * Copyright (C) 2002 Ronald Bultje * * 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 #endif #include "v4l2_calls.h" #include "gstv4l2element-marshal.h" /* elementfactory details */ static GstElementDetails gst_v4l2element_details = { "Generic video4linux2 Element", "None/Video", "LGPL", "Generic plugin for handling common video4linux2 calls", VERSION, "Ronald Bultje ", "(C) 2002", }; /* V4l2Element signals and args */ enum { /* FILL ME */ SIGNAL_OPEN, SIGNAL_CLOSE, SIGNAL_SET_VIDEOWINDOW, SIGNAL_GET_ATTRIBUTE, SIGNAL_SET_ATTRIBUTE, 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_ATTRIBUTES, ARG_DEVICE, ARG_DEVICE_NAME, ARG_DEVICE_HAS_CAPTURE, ARG_DEVICE_HAS_OVERLAY, ARG_DEVICE_HAS_PLAYBACK, ARG_DISPLAY, 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_ATTRIBUTES, g_param_spec_pointer("attributes","attributes","attributes", 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_PLAYBACK, g_param_spec_boolean("can_playback","can_playback","can_playback", 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_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)); /* actions */ gst_v4l2element_signals[SIGNAL_SET_VIDEOWINDOW] = g_signal_new ("set_videowindow", G_TYPE_FROM_CLASS(klass), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET(GstV4l2ElementClass, set_videowindow), NULL, NULL, gstv4l2_cclosure_marshal_BOOLEAN__INT_INT_INT_INT_POINTER_INT, G_TYPE_BOOLEAN, 6, G_TYPE_INT, G_TYPE_INT, G_TYPE_INT, G_TYPE_INT, G_TYPE_POINTER, G_TYPE_INT); klass->set_videowindow = gst_v4l2_set_window; gst_v4l2element_signals[SIGNAL_GET_ATTRIBUTE] = g_signal_new ("get_attribute", G_TYPE_FROM_CLASS(klass), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET(GstV4l2ElementClass, get_attribute), NULL, NULL, gstv4l2_cclosure_marshal_BOOLEAN__STRING_POINTER, G_TYPE_BOOLEAN, 2, G_TYPE_STRING, G_TYPE_POINTER); klass->get_attribute = gst_v4l2_get_attribute; gst_v4l2element_signals[SIGNAL_SET_ATTRIBUTE] = g_signal_new ("set_attribute", G_TYPE_FROM_CLASS(klass), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET(GstV4l2ElementClass, set_attribute), NULL, NULL, gstv4l2_cclosure_marshal_BOOLEAN__STRING_INT, G_TYPE_BOOLEAN, 2, G_TYPE_STRING, G_TYPE_INT); klass->set_attribute = gst_v4l2_set_attribute; /* signals */ gst_v4l2element_signals[SIGNAL_OPEN] = g_signal_new("open", G_TYPE_FROM_CLASS(klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET(GstV4l2ElementClass, open), NULL, NULL, g_cclosure_marshal_VOID__STRING, G_TYPE_NONE, 1, G_TYPE_STRING); gst_v4l2element_signals[SIGNAL_CLOSE] = g_signal_new("close", G_TYPE_FROM_CLASS(klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET(GstV4l2ElementClass, close), NULL, NULL, g_cclosure_marshal_VOID__STRING, G_TYPE_NONE, 1, G_TYPE_STRING); 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->menus = NULL; v4l2element->control_specs = NULL; v4l2element->outputs = NULL; v4l2element->output_names = NULL; v4l2element->inputs = NULL; v4l2element->input_names = NULL; v4l2element->norms = NULL; v4l2element->norm_names = 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_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_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; /* 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: g_value_set_pointer(value, v4l2element->input_names); 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: g_value_set_pointer(value, v4l2element->output_names); 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: g_value_set_pointer(value, v4l2element->norm_names); break; case ARG_HAS_TUNER: if (GST_V4L2_IS_OPEN(v4l2element)) g_value_set_boolean(value, gst_v4l2_has_tuner(v4l2element, &temp_i)); 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_ATTRIBUTES: g_value_set_pointer(value, v4l2element->control_specs); break; case ARG_DEVICE: g_value_set_string(value, v4l2element->device); break; case ARG_DEVICE_NAME: if (GST_V4L2_IS_OPEN(v4l2element)) g_value_set_string(value, v4l2element->vcap.card); break; case ARG_DEVICE_HAS_CAPTURE: if (GST_V4L2_IS_OPEN(v4l2element) && v4l2element->vcap.capabilities & V4L2_CAP_VIDEO_CAPTURE && v4l2element->vcap.capabilities & V4L2_CAP_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.capabilities & V4L2_CAP_VIDEO_OVERLAY) temp_i = 1; g_value_set_boolean(value, temp_i>0?TRUE:FALSE); break; case ARG_DEVICE_HAS_PLAYBACK: if (GST_V4L2_IS_OPEN(v4l2element) && v4l2element->vcap.capabilities & V4L2_CAP_VIDEO_OUTPUT && v4l2element->vcap.capabilities & V4L2_CAP_STREAMING) 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; /* emit a signal! whoopie! */ g_signal_emit(G_OBJECT(v4l2element), gst_v4l2element_signals[SIGNAL_OPEN], 0, v4l2element->device); /* 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; /* emit yet another signal! wheehee! */ g_signal_emit(G_OBJECT(v4l2element), gst_v4l2element_signals[SIGNAL_CLOSE], 0, v4l2element->device); 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 };