gstreamer/ges/ges-text-overlay.c
Tim-Philipp Müller a7347ca8f7 WIP: ges: fix API export/import and 'inconsistent linkage' on MSVC
Export GES library API in headers when we're building the
library itself, otherwise import the API from the headers.

This fixes linker warnings on Windows when building with MSVC.

Fix up some missing config.h includes when building the lib which
is needed to get the export api define from config.h

Fixes https://gitlab.freedesktop.org/gstreamer/gst-editing-services/issues/42
2018-12-15 00:14:51 +00:00

438 lines
11 KiB
C

/* 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 *bg_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;
bg_class->create_element = ges_text_overlay_create_element;
}
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.
*/
GESTextOverlay *
ges_text_overlay_new (void)
{
return g_object_new (GES_TYPE_TEXT_OVERLAY, "track-type",
GES_TRACK_TYPE_VIDEO, NULL);
}