/* 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 ! " "video/x-raw,width=%d,height=%d ! t.video_sink " "textoverlay name=t font-desc=\"Sans Serif, 20\" ! " " 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" "<----- halignment = %s ----->\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; }