/* GStreamer Editing Services * Copyright (C) 2010 Brandon Lewis <brandon.lewis@collabora.co.uk> * 2010 Nokia Corporation * * 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., 51 Franklin St, Fifth Floor, * Boston, MA 02110-1301, USA. */ /** * SECTION:gestextoverlay * @title: GESTextOverlay * @short_description: render text onto another video stream in a GESLayer * */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include "ges-internal.h" #include "ges-track-element.h" #include "ges-title-source.h" #include "ges-text-overlay.h" struct _GESTextOverlayPrivate { gchar *text; gchar *font_desc; GESTextHAlign halign; GESTextVAlign valign; guint32 color; gdouble xpos; gdouble ypos; GstElement *text_el; }; enum { PROP_0, }; G_DEFINE_TYPE_WITH_PRIVATE (GESTextOverlay, ges_text_overlay, GES_TYPE_OPERATION); static void ges_text_overlay_dispose (GObject * object); static void ges_text_overlay_finalize (GObject * object); static void ges_text_overlay_get_property (GObject * object, guint property_id, GValue * value, GParamSpec * pspec); static void ges_text_overlay_set_property (GObject * object, guint property_id, const GValue * value, GParamSpec * pspec); static GstElement *ges_text_overlay_create_element (GESTrackElement * self); static void ges_text_overlay_class_init (GESTextOverlayClass * klass) { GObjectClass *object_class = G_OBJECT_CLASS (klass); GESTrackElementClass *track_element_class = GES_TRACK_ELEMENT_CLASS (klass); object_class->get_property = ges_text_overlay_get_property; object_class->set_property = ges_text_overlay_set_property; object_class->dispose = ges_text_overlay_dispose; object_class->finalize = ges_text_overlay_finalize; track_element_class->create_element = ges_text_overlay_create_element; track_element_class->ABI.abi.default_track_type = GES_TRACK_TYPE_VIDEO; } static void ges_text_overlay_init (GESTextOverlay * self) { self->priv = ges_text_overlay_get_instance_private (self); self->priv->text = NULL; self->priv->font_desc = NULL; self->priv->text_el = NULL; self->priv->halign = DEFAULT_HALIGNMENT; self->priv->valign = DEFAULT_VALIGNMENT; self->priv->color = G_MAXUINT32; self->priv->xpos = 0.5; self->priv->ypos = 0.5; } static void ges_text_overlay_dispose (GObject * object) { GESTextOverlay *self = GES_TEXT_OVERLAY (object); if (self->priv->text) { g_free (self->priv->text); } if (self->priv->font_desc) { g_free (self->priv->font_desc); } if (self->priv->text_el) { gst_object_unref (self->priv->text_el); self->priv->text_el = NULL; } G_OBJECT_CLASS (ges_text_overlay_parent_class)->dispose (object); } static void ges_text_overlay_finalize (GObject * object) { G_OBJECT_CLASS (ges_text_overlay_parent_class)->finalize (object); } static void ges_text_overlay_get_property (GObject * object, guint property_id, GValue * value, GParamSpec * pspec) { switch (property_id) { default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); } } static void ges_text_overlay_set_property (GObject * object, guint property_id, const GValue * value, GParamSpec * pspec) { switch (property_id) { default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); } } static GstElement * ges_text_overlay_create_element (GESTrackElement * track_element) { GstElement *ret, *text, *iconv, *oconv; GstPad *src_target, *sink_target; GstPad *src, *sink; GESTextOverlay *self = GES_TEXT_OVERLAY (track_element); const gchar *child_props[] = { "xpos", "ypos", "deltax", "deltay", "auto-resize", "outline-color", NULL }; text = gst_element_factory_make ("textoverlay", NULL); iconv = gst_element_factory_make ("videoconvert", NULL); oconv = gst_element_factory_make ("videoconvert", NULL); self->priv->text_el = text; gst_object_ref (text); if (self->priv->text) g_object_set (text, "text", (gchar *) self->priv->text, NULL); if (self->priv->font_desc) g_object_set (text, "font-desc", (gchar *) self->priv->font_desc, NULL); g_object_set (text, "halignment", (gint) self->priv->halign, "valignment", (gint) self->priv->valign, NULL); g_object_set (text, "color", (guint) self->priv->color, NULL); g_object_set (text, "xpos", (gdouble) self->priv->xpos, NULL); g_object_set (text, "ypos", (gdouble) self->priv->ypos, NULL); ges_track_element_add_children_props (track_element, text, NULL, NULL, child_props); ret = gst_bin_new ("overlay-bin"); gst_bin_add_many (GST_BIN (ret), text, iconv, oconv, NULL); gst_element_link_many (iconv, text, oconv, NULL); src_target = gst_element_get_static_pad (oconv, "src"); sink_target = gst_element_get_static_pad (iconv, "sink"); src = gst_ghost_pad_new ("src", src_target); sink = gst_ghost_pad_new ("video_sink", sink_target); gst_object_unref (src_target); gst_object_unref (sink_target); gst_element_add_pad (ret, src); gst_element_add_pad (ret, sink); return ret; } /** * ges_text_overlay_set_text: * @self: the #GESTextOverlay* to set text on * @text: the text to render. an internal copy of this text will be * made. * * Sets the text this track element will render. * */ void ges_text_overlay_set_text (GESTextOverlay * self, const gchar * text) { GST_DEBUG ("self:%p, text:%s", self, text); if (self->priv->text) g_free (self->priv->text); self->priv->text = g_strdup (text); if (self->priv->text_el) g_object_set (self->priv->text_el, "text", text, NULL); } /** * ges_text_overlay_set_font_desc: * @self: the #GESTextOverlay * @font_desc: the pango font description * * Sets the pango font description of the text this track element * will render. * */ void ges_text_overlay_set_font_desc (GESTextOverlay * self, const gchar * font_desc) { GST_DEBUG ("self:%p, font_desc:%s", self, font_desc); if (self->priv->font_desc) g_free (self->priv->font_desc); self->priv->font_desc = g_strdup (font_desc); GST_LOG ("setting font-desc to '%s'", font_desc); if (self->priv->text_el) g_object_set (self->priv->text_el, "font-desc", font_desc, NULL); } /** * ges_text_overlay_set_valignment: * @self: the #GESTextOverlay* to set text on * @valign: The #GESTextVAlign defining the vertical alignment * of the text render by @self. * * Sets the vertical aligment of the text. * */ void ges_text_overlay_set_valignment (GESTextOverlay * self, GESTextVAlign valign) { GST_DEBUG ("self:%p, halign:%d", self, valign); self->priv->valign = valign; if (self->priv->text_el) g_object_set (self->priv->text_el, "valignment", valign, NULL); } /** * ges_text_overlay_set_halignment: * @self: the #GESTextOverlay* to set text on * @halign: The #GESTextHAlign defining the horizontal alignment * of the text render by @self. * * Sets the horizontal aligment of the text. * */ void ges_text_overlay_set_halignment (GESTextOverlay * self, GESTextHAlign halign) { GST_DEBUG ("self:%p, halign:%d", self, halign); self->priv->halign = halign; if (self->priv->text_el) g_object_set (self->priv->text_el, "halignment", halign, NULL); } /** * ges_text_overlay_set_color: * @self: the #GESTextOverlay* to set * @color: The color @self is being set to * * Sets the color of the text. */ void ges_text_overlay_set_color (GESTextOverlay * self, guint32 color) { GST_DEBUG ("self:%p, color:%d", self, color); self->priv->color = color; if (self->priv->text_el) g_object_set (self->priv->text_el, "color", color, NULL); } /** * ges_text_overlay_set_xpos: * @self: the #GESTextOverlay* to set * @position: The horizontal position @self is being set to * * Sets the horizontal position of the text. */ void ges_text_overlay_set_xpos (GESTextOverlay * self, gdouble position) { GST_DEBUG ("self:%p, xpos:%f", self, position); self->priv->xpos = position; if (self->priv->text_el) g_object_set (self->priv->text_el, "xpos", position, NULL); } /** * ges_text_overlay_set_ypos: * @self: the #GESTextOverlay* to set * @position: The vertical position @self is being set to * * Sets the vertical position of the text. */ void ges_text_overlay_set_ypos (GESTextOverlay * self, gdouble position) { GST_DEBUG ("self:%p, ypos:%f", self, position); self->priv->ypos = position; if (self->priv->text_el) g_object_set (self->priv->text_el, "ypos", position, NULL); } /** * ges_text_overlay_get_text: * @self: a GESTextOverlay * * Get the text currently set on @source. * * Returns: The text currently set on @source. */ const gchar * ges_text_overlay_get_text (GESTextOverlay * self) { return self->priv->text; } /** * ges_text_overlay_get_font_desc: * @self: a GESTextOverlay * * Get the pango font description currently set on @source. * * Returns: The pango font description currently set on @source. */ const char * ges_text_overlay_get_font_desc (GESTextOverlay * self) { return self->priv->font_desc; } /** * ges_text_overlay_get_halignment: * @self: a GESTextOverlay * * Get the horizontal aligment used by @source. * * Returns: The horizontal aligment used by @source. */ GESTextHAlign ges_text_overlay_get_halignment (GESTextOverlay * self) { return self->priv->halign; } /** * ges_text_overlay_get_valignment: * @self: a GESTextOverlay * * Get the vertical aligment used by @source. * * Returns: The vertical aligment used by @source. */ GESTextVAlign ges_text_overlay_get_valignment (GESTextOverlay * self) { return self->priv->valign; } /** * ges_text_overlay_get_color: * @self: a GESTextOverlay * * Get the color used by @source. * * Returns: The color used by @source. */ const guint32 ges_text_overlay_get_color (GESTextOverlay * self) { return self->priv->color; } /** * ges_text_overlay_get_xpos: * @self: a GESTextOverlay * * Get the horizontal position used by @source. * * Returns: The horizontal position used by @source. */ const gdouble ges_text_overlay_get_xpos (GESTextOverlay * self) { return self->priv->xpos; } /** * ges_text_overlay_get_ypos: * @self: a GESTextOverlay * * Get the vertical position used by @source. * * Returns: The vertical position used by @source. */ const gdouble ges_text_overlay_get_ypos (GESTextOverlay * self) { return self->priv->ypos; } /** * ges_text_overlay_new: * * Creates a new #GESTextOverlay. * * Returns: (transfer floating) (nullable): The newly created #GESTextOverlay or * %NULL if something went wrong. * * Deprecated: 1.18: This should never be called by applications as this will * be created by clips. */ GESTextOverlay * ges_text_overlay_new (void) { GESTextOverlay *res; GESAsset *asset = ges_asset_request (GES_TYPE_TEXT_OVERLAY, NULL, NULL); res = GES_TEXT_OVERLAY (ges_asset_extract (asset, NULL)); gst_object_unref (asset); return res; }