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447 lines
11 KiB
C
447 lines
11 KiB
C
/* GStreamer Editing Services
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* Copyright (C) 2010 Brandon Lewis <brandon.lewis@collabora.co.uk>
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* 2010 Nokia Corporation
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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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
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:gestextoverlay
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* @title: GESTextOverlay
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* @short_description: render text onto another video stream in a GESLayer
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*
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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 "ges-internal.h"
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#include "ges-track-element.h"
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#include "ges-title-source.h"
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#include "ges-text-overlay.h"
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struct _GESTextOverlayPrivate
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{
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gchar *text;
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gchar *font_desc;
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GESTextHAlign halign;
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GESTextVAlign valign;
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guint32 color;
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gdouble xpos;
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gdouble ypos;
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GstElement *text_el;
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};
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enum
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{
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PROP_0,
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};
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G_DEFINE_TYPE_WITH_PRIVATE (GESTextOverlay, ges_text_overlay,
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GES_TYPE_OPERATION);
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static void ges_text_overlay_dispose (GObject * object);
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static void ges_text_overlay_finalize (GObject * object);
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static void ges_text_overlay_get_property (GObject * object, guint
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property_id, GValue * value, GParamSpec * pspec);
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static void ges_text_overlay_set_property (GObject * object, guint
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property_id, const GValue * value, GParamSpec * pspec);
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static GstElement *ges_text_overlay_create_element (GESTrackElement * self);
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static void
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ges_text_overlay_class_init (GESTextOverlayClass * klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GESTrackElementClass *track_element_class = GES_TRACK_ELEMENT_CLASS (klass);
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object_class->get_property = ges_text_overlay_get_property;
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object_class->set_property = ges_text_overlay_set_property;
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object_class->dispose = ges_text_overlay_dispose;
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object_class->finalize = ges_text_overlay_finalize;
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track_element_class->create_element = ges_text_overlay_create_element;
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track_element_class->ABI.abi.default_track_type = GES_TRACK_TYPE_VIDEO;
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}
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static void
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ges_text_overlay_init (GESTextOverlay * self)
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{
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self->priv = ges_text_overlay_get_instance_private (self);
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self->priv->text = NULL;
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self->priv->font_desc = NULL;
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self->priv->text_el = NULL;
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self->priv->halign = DEFAULT_HALIGNMENT;
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self->priv->valign = DEFAULT_VALIGNMENT;
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self->priv->color = G_MAXUINT32;
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self->priv->xpos = 0.5;
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self->priv->ypos = 0.5;
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}
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static void
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ges_text_overlay_dispose (GObject * object)
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{
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GESTextOverlay *self = GES_TEXT_OVERLAY (object);
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if (self->priv->text) {
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g_free (self->priv->text);
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}
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if (self->priv->font_desc) {
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g_free (self->priv->font_desc);
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}
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if (self->priv->text_el) {
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gst_object_unref (self->priv->text_el);
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self->priv->text_el = NULL;
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}
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G_OBJECT_CLASS (ges_text_overlay_parent_class)->dispose (object);
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}
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static void
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ges_text_overlay_finalize (GObject * object)
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{
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G_OBJECT_CLASS (ges_text_overlay_parent_class)->finalize (object);
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}
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static void
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ges_text_overlay_get_property (GObject * object,
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guint property_id, GValue * value, GParamSpec * pspec)
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{
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switch (property_id) {
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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}
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}
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static void
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ges_text_overlay_set_property (GObject * object,
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guint property_id, const GValue * value, GParamSpec * pspec)
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{
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switch (property_id) {
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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}
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}
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static GstElement *
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ges_text_overlay_create_element (GESTrackElement * track_element)
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{
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GstElement *ret, *text, *iconv, *oconv;
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GstPad *src_target, *sink_target;
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GstPad *src, *sink;
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GESTextOverlay *self = GES_TEXT_OVERLAY (track_element);
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const gchar *child_props[] =
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{ "xpos", "ypos", "deltax", "deltay", "auto-resize", "outline-color",
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NULL
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};
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text = gst_element_factory_make ("textoverlay", NULL);
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iconv = gst_element_factory_make ("videoconvert", NULL);
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oconv = gst_element_factory_make ("videoconvert", NULL);
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self->priv->text_el = text;
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gst_object_ref (text);
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if (self->priv->text)
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g_object_set (text, "text", (gchar *) self->priv->text, NULL);
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if (self->priv->font_desc)
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g_object_set (text, "font-desc", (gchar *) self->priv->font_desc, NULL);
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g_object_set (text, "halignment", (gint) self->priv->halign, "valignment",
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(gint) self->priv->valign, NULL);
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g_object_set (text, "color", (guint) self->priv->color, NULL);
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g_object_set (text, "xpos", (gdouble) self->priv->xpos, NULL);
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g_object_set (text, "ypos", (gdouble) self->priv->ypos, NULL);
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ges_track_element_add_children_props (track_element, text, NULL, NULL,
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child_props);
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ret = gst_bin_new ("overlay-bin");
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gst_bin_add_many (GST_BIN (ret), text, iconv, oconv, NULL);
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gst_element_link_many (iconv, text, oconv, NULL);
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src_target = gst_element_get_static_pad (oconv, "src");
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sink_target = gst_element_get_static_pad (iconv, "sink");
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src = gst_ghost_pad_new ("src", src_target);
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sink = gst_ghost_pad_new ("video_sink", sink_target);
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gst_object_unref (src_target);
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gst_object_unref (sink_target);
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gst_element_add_pad (ret, src);
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gst_element_add_pad (ret, sink);
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return ret;
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}
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/**
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* ges_text_overlay_set_text:
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* @self: the #GESTextOverlay* to set text on
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* @text: the text to render. an internal copy of this text will be
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* made.
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*
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* Sets the text this track element will render.
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*
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*/
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void
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ges_text_overlay_set_text (GESTextOverlay * self, const gchar * text)
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{
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GST_DEBUG ("self:%p, text:%s", self, text);
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if (self->priv->text)
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g_free (self->priv->text);
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self->priv->text = g_strdup (text);
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if (self->priv->text_el)
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g_object_set (self->priv->text_el, "text", text, NULL);
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}
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/**
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* ges_text_overlay_set_font_desc:
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* @self: the #GESTextOverlay
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* @font_desc: the pango font description
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*
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* Sets the pango font description of the text this track element
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* will render.
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*
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*/
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void
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ges_text_overlay_set_font_desc (GESTextOverlay * self, const gchar * font_desc)
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{
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GST_DEBUG ("self:%p, font_desc:%s", self, font_desc);
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if (self->priv->font_desc)
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g_free (self->priv->font_desc);
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self->priv->font_desc = g_strdup (font_desc);
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GST_LOG ("setting font-desc to '%s'", font_desc);
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if (self->priv->text_el)
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g_object_set (self->priv->text_el, "font-desc", font_desc, NULL);
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}
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/**
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* ges_text_overlay_set_valignment:
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* @self: the #GESTextOverlay* to set text on
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* @valign: The #GESTextVAlign defining the vertical alignment
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* of the text render by @self.
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*
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* Sets the vertical aligment of the text.
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*
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*/
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void
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ges_text_overlay_set_valignment (GESTextOverlay * self, GESTextVAlign valign)
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{
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GST_DEBUG ("self:%p, halign:%d", self, valign);
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self->priv->valign = valign;
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if (self->priv->text_el)
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g_object_set (self->priv->text_el, "valignment", valign, NULL);
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}
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/**
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* ges_text_overlay_set_halignment:
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* @self: the #GESTextOverlay* to set text on
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* @halign: The #GESTextHAlign defining the horizontal alignment
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* of the text render by @self.
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*
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* Sets the horizontal aligment of the text.
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*
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*/
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void
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ges_text_overlay_set_halignment (GESTextOverlay * self, GESTextHAlign halign)
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{
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GST_DEBUG ("self:%p, halign:%d", self, halign);
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self->priv->halign = halign;
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if (self->priv->text_el)
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g_object_set (self->priv->text_el, "halignment", halign, NULL);
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}
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/**
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* ges_text_overlay_set_color:
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* @self: the #GESTextOverlay* to set
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* @color: The color @self is being set to
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*
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* Sets the color of the text.
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*/
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void
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ges_text_overlay_set_color (GESTextOverlay * self, guint32 color)
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{
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GST_DEBUG ("self:%p, color:%d", self, color);
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self->priv->color = color;
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if (self->priv->text_el)
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g_object_set (self->priv->text_el, "color", color, NULL);
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}
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/**
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* ges_text_overlay_set_xpos:
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* @self: the #GESTextOverlay* to set
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* @position: The horizontal position @self is being set to
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*
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* Sets the horizontal position of the text.
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*/
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void
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ges_text_overlay_set_xpos (GESTextOverlay * self, gdouble position)
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{
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GST_DEBUG ("self:%p, xpos:%f", self, position);
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self->priv->xpos = position;
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if (self->priv->text_el)
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g_object_set (self->priv->text_el, "xpos", position, NULL);
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}
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/**
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* ges_text_overlay_set_ypos:
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* @self: the #GESTextOverlay* to set
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* @position: The vertical position @self is being set to
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*
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* Sets the vertical position of the text.
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*/
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void
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ges_text_overlay_set_ypos (GESTextOverlay * self, gdouble position)
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{
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GST_DEBUG ("self:%p, ypos:%f", self, position);
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self->priv->ypos = position;
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if (self->priv->text_el)
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g_object_set (self->priv->text_el, "ypos", position, NULL);
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}
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/**
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* ges_text_overlay_get_text:
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* @self: a GESTextOverlay
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*
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* Get the text currently set on @source.
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*
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* Returns: The text currently set on @source.
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*/
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const gchar *
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ges_text_overlay_get_text (GESTextOverlay * self)
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{
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return self->priv->text;
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}
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/**
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* ges_text_overlay_get_font_desc:
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* @self: a GESTextOverlay
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*
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* Get the pango font description currently set on @source.
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*
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* Returns: The pango font description currently set on @source.
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*/
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const char *
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ges_text_overlay_get_font_desc (GESTextOverlay * self)
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{
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return self->priv->font_desc;
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}
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/**
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* ges_text_overlay_get_halignment:
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* @self: a GESTextOverlay
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*
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* Get the horizontal aligment used by @source.
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*
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* Returns: The horizontal aligment used by @source.
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*/
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GESTextHAlign
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ges_text_overlay_get_halignment (GESTextOverlay * self)
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{
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return self->priv->halign;
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}
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/**
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* ges_text_overlay_get_valignment:
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* @self: a GESTextOverlay
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*
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* Get the vertical aligment used by @source.
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*
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* Returns: The vertical aligment used by @source.
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*/
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GESTextVAlign
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ges_text_overlay_get_valignment (GESTextOverlay * self)
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{
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return self->priv->valign;
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}
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/**
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* ges_text_overlay_get_color:
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* @self: a GESTextOverlay
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*
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* Get the color used by @source.
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*
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* Returns: The color used by @source.
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*/
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const guint32
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ges_text_overlay_get_color (GESTextOverlay * self)
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{
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return self->priv->color;
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}
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/**
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* ges_text_overlay_get_xpos:
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* @self: a GESTextOverlay
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*
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* Get the horizontal position used by @source.
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*
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* Returns: The horizontal position used by @source.
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*/
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const gdouble
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ges_text_overlay_get_xpos (GESTextOverlay * self)
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{
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return self->priv->xpos;
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}
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/**
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* ges_text_overlay_get_ypos:
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* @self: a GESTextOverlay
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*
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* Get the vertical position used by @source.
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*
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* Returns: The vertical position used by @source.
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*/
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const gdouble
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ges_text_overlay_get_ypos (GESTextOverlay * self)
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{
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return self->priv->ypos;
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}
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/**
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* ges_text_overlay_new:
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*
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* Creates a new #GESTextOverlay.
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*
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* Returns: (transfer floating) (nullable): The newly created #GESTextOverlay or
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* %NULL if something went wrong.
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*
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* Deprecated: 1.18: This should never be called by applications as this will
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* be created by clips.
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*/
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GESTextOverlay *
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ges_text_overlay_new (void)
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{
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GESTextOverlay *res;
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GESAsset *asset = ges_asset_request (GES_TYPE_TEXT_OVERLAY, NULL, NULL);
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res = GES_TEXT_OVERLAY (ges_asset_extract (asset, NULL));
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gst_object_unref (asset);
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return res;
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}
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