/* 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;

}