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/*
* Clutter-GStreamer.
*
* GStreamer integration library for Clutter.
*
* test-alpha.c - Transparent videos.
*
* Authored by Damien Lespiau <damien.lespiau@intel.com>
*
* Copyright (C) 2009 Intel Corporation
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <string.h>
#include <math.h>
#include <glib/gprintf.h>
#include <clutter-gst/clutter-gst.h>
static gint opt_framerate = 30;
static gchar *opt_fourcc = "I420";
static gint opt_bpp = 24;
static gint opt_depth = 24;
static GOptionEntry options[] =
{
{ "framerate",
'f', 0,
G_OPTION_ARG_INT,
&opt_framerate,
"Number of frames per second",
NULL },
{ "fourcc",
'o', 0,
G_OPTION_ARG_STRING,
&opt_fourcc,
"Fourcc of the wanted YUV format",
NULL },
{ NULL }
};
static guint32
parse_fourcc (const gchar *fourcc)
{
if (strlen (fourcc) != 4)
return 0;
return GST_STR_FOURCC (fourcc);
}
void
size_change (ClutterTexture *texture,
gint width,
gint height,
gpointer user_data)
{
ClutterActor *stage;
gfloat new_x, new_y, new_width, new_height;
gfloat stage_width, stage_height;
stage = clutter_actor_get_stage (CLUTTER_ACTOR (texture));
if (stage == NULL)
return;
clutter_actor_get_size (stage, &stage_width, &stage_height);
new_height = (height * stage_width) / width;
if (new_height <= stage_height)
{
new_width = stage_width;
new_x = 0;
new_y = (stage_height - new_height) / 2;
}
else
{
new_width = (width * stage_height) / height;
new_height = stage_height;
new_x = (stage_width - new_width) / 2;
new_y = 0;
}
clutter_actor_set_position (CLUTTER_ACTOR (texture), new_x, new_y);
clutter_actor_set_size (CLUTTER_ACTOR (texture), new_width, new_height);
}
int
main (int argc, char *argv[])
{
GError *error = NULL;
gboolean result;
const ClutterColor stage_color = {128, 0, 192, 255};
const ClutterColor rectangle_color = { 96, 0, 0, 255};
const ClutterGeometry rectangle_geom = {110, 70, 100, 100};
ClutterActor *stage;
ClutterActor *texture;
ClutterActor *rectangle;
ClutterAnimation *animation;
GstPipeline *pipeline;
GstElement *src;
GstElement *capsfilter;
GstElement *sink;
GstCaps *caps;
if (!g_thread_supported ())
g_thread_init (NULL);
result = clutter_gst_init_with_args (&argc,
&argv,
" - Test alpha with video textures",
options,
NULL,
&error);
if (error)
{
g_print ("%s\n", error->message);
g_error_free (error);
return EXIT_FAILURE;
}
stage = clutter_stage_get_default ();
clutter_actor_set_size (stage, 320.0f, 240.0f);
clutter_stage_set_color (CLUTTER_STAGE (stage), &stage_color);
rectangle = clutter_rectangle_new_with_color (&rectangle_color);
clutter_actor_set_geometry (rectangle, &rectangle_geom);
/* We need to set certain props on the target texture currently for
* efficient/corrent playback onto the texture (which sucks a bit)
*/
texture = g_object_new (CLUTTER_TYPE_TEXTURE,
"disable-slicing", TRUE,
NULL);
clutter_actor_set_opacity (texture, 0);
g_signal_connect (CLUTTER_TEXTURE (texture),
"size-change",
G_CALLBACK (size_change), NULL);
/* Set up pipeline */
pipeline = GST_PIPELINE(gst_pipeline_new (NULL));
src = gst_element_factory_make ("videotestsrc", NULL);
g_object_set (G_OBJECT (src), "pattern", 1, NULL);
capsfilter = gst_element_factory_make ("capsfilter", NULL);
sink = clutter_gst_video_sink_new (CLUTTER_TEXTURE (texture));
/* make videotestsrc spit the format we want */
if (g_strcmp0 (opt_fourcc, "RGB ") == 0)
{
caps = gst_caps_new_simple ("video/x-raw-rgb",
"bpp", G_TYPE_INT, opt_bpp,
"depth", G_TYPE_INT, opt_depth,
"framerate", GST_TYPE_FRACTION,
opt_framerate, 1,
NULL);
}
else
{
caps = gst_caps_new_simple ("video/x-raw-yuv",
"format", GST_TYPE_FOURCC,
parse_fourcc (opt_fourcc),
"framerate", GST_TYPE_FRACTION,
opt_framerate, 1,
NULL);
}
g_object_set (capsfilter, "caps", caps, NULL);
g_printf ("%s: [caps] %s\n", __FILE__, gst_caps_to_string (caps));
gst_bin_add_many (GST_BIN (pipeline), src, capsfilter, sink, NULL);
result = gst_element_link_many (src, capsfilter, sink, NULL);
if (result == FALSE)
g_critical("Could not link elements");
gst_element_set_state (GST_ELEMENT(pipeline), GST_STATE_PLAYING);
clutter_container_add (CLUTTER_CONTAINER (stage), rectangle, texture, NULL);
clutter_actor_show_all (stage);
animation = clutter_actor_animate (texture, CLUTTER_LINEAR, 6000,
"opacity", 0xff,
NULL);
clutter_animation_set_loop (animation, TRUE);
clutter_main();
return EXIT_SUCCESS;
}
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