gstreamer/subprojects/gst-plugins-base/tests/interactive/test-textoverlay.c

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/* GStreamer interactive textoverlay test
* Copyright (C) 2007 Tim-Philipp Müller <tim centricular 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
static void
set_enum_property_by_name (gpointer object, const gchar * prop,
const gchar * value)
{
GParamSpec *pspec;
GValue val = { 0, };
GEnumClass *eclass;
GEnumValue *eval;
pspec = g_object_class_find_property (G_OBJECT_GET_CLASS (object), prop);
g_return_if_fail (pspec != NULL);
g_value_init (&val, pspec->value_type);
g_object_get_property (G_OBJECT (object), prop, &val);
eclass = G_ENUM_CLASS (g_type_class_peek (G_VALUE_TYPE (&val)));
g_return_if_fail (eclass != NULL);
eval = g_enum_get_value_by_name (eclass, value);
if (eval == NULL)
eval = g_enum_get_value_by_nick (eclass, value);
g_return_if_fail (eval != NULL);
g_value_set_enum (&val, eval->value);
g_object_set_property (G_OBJECT (object), prop, &val);
g_value_unset (&val);
}
static void
show_text (GstElement * textoverlay, const gchar * txt, const gchar * valign,
const gchar * halign, const gchar * line_align)
{
GstElement *pipe;
g_object_set (textoverlay, "text", txt, NULL);
set_enum_property_by_name (textoverlay, "valignment", valign);
set_enum_property_by_name (textoverlay, "halignment", halign);
set_enum_property_by_name (textoverlay, "line-alignment", line_align);
pipe = textoverlay;
while (GST_ELEMENT_PARENT (pipe))
pipe = GST_ELEMENT_PARENT (pipe);
gst_element_set_state (pipe, GST_STATE_PLAYING);
gst_bus_poll (GST_ELEMENT_BUS (pipe), GST_MESSAGE_ERROR, GST_SECOND);
gst_element_set_state (pipe, GST_STATE_NULL);
}
static void
test_textoverlay (int width, int height)
{
const gchar *valigns[] = { /* "baseline", */ "bottom", "top" };
const gchar *haligns[] = { "left", "center", "right" };
const gchar *linealigns[] = { "left", "center", "right" };
GstElement *pipe, *toverlay;
gchar *pstr;
gint a, b, c;
pstr = g_strdup_printf ("videotestsrc pattern=blue ! "
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"video/x-raw,width=%d,height=%d ! t.video_sink "
"textoverlay name=t font-desc=\"Sans Serif, 20\" ! "
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" videoconvert ! videoscale ! autovideosink", width, height);
pipe = gst_parse_launch_full (pstr, NULL, GST_PARSE_FLAG_NONE, NULL);
g_assert (pipe);
toverlay = gst_bin_get_by_name (GST_BIN (pipe), "t");
g_assert (toverlay);
g_object_set (toverlay, "xpad", 3, "ypad", 3, NULL);
for (a = 0; a < G_N_ELEMENTS (valigns); ++a) {
for (b = 0; b < G_N_ELEMENTS (haligns); ++b) {
for (c = 0; c < G_N_ELEMENTS (linealigns); ++c) {
gchar *s;
s = g_strdup_printf ("line-alignment = %s\n"
"&lt;----- halignment = %s -----&gt;\nvalignment = %s",
linealigns[c], haligns[b], valigns[a]);
show_text (toverlay, s, valigns[a], haligns[b], linealigns[c]);
g_free (s);
}
}
}
gst_object_unref (toverlay);
g_free (pstr);
}
int
main (int argc, char **argv)
{
gst_init (&argc, &argv);
test_textoverlay (640, 480);
g_print ("Now with odd width/height ...\n");
test_textoverlay (639, 479);
/* test_textoverlay (796, 256); */
return 0;
}