mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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459 lines
12 KiB
C
459 lines
12 KiB
C
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/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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* <2003> David Schleef <ds@schleef.org>
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* <2004> Benjamin Otte <otte@gnome.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gst/gst.h>
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#include <gstvideofilter.h>
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#include "gstvideoimage.h"
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#include <string.h>
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#define GST_TYPE_PUZZLE \
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(gst_puzzle_get_type())
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#define GST_PUZZLE(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_PUZZLE,GstPuzzle))
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#define GST_PUZZLE_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_PUZZLE,GstPuzzleClass))
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#define GST_IS_PUZZLE(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_PUZZLE))
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#define GST_IS_PUZZLE_CLASS(obj) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_PUZZLE))
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typedef struct _GstPuzzle GstPuzzle;
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typedef struct _GstPuzzleClass GstPuzzleClass;
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struct _GstPuzzle
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{
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GstVideofilter videofilter;
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const GstVideoFormat *format;
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/* properties */
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guint rows;
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guint columns;
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guint tiles;
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/* state */
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guint *permutation;
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guint position;
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gboolean solved;
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};
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struct _GstPuzzleClass
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{
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GstVideofilterClass parent_class;
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};
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/* GstPuzzle signals and args */
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enum
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{
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/* FILL ME */
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LAST_SIGNAL
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};
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enum
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{
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ARG_0,
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ARG_COLUMNS,
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ARG_ROWS
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/* FILL ME */
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};
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static void gst_puzzle_base_init (gpointer g_class);
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static void gst_puzzle_class_init (gpointer g_class, gpointer class_data);
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static void gst_puzzle_init (GTypeInstance * instance, gpointer g_class);
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static void gst_puzzle_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_puzzle_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static void gst_puzzle_setup (GstVideofilter * videofilter);
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static void draw_puzzle (GstVideofilter * videofilter, void *destp, void *srcp);
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GType
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gst_puzzle_get_type (void)
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{
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static GType puzzle_type = 0;
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if (!puzzle_type) {
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static const GTypeInfo puzzle_info = {
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sizeof (GstPuzzleClass),
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gst_puzzle_base_init,
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NULL,
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gst_puzzle_class_init,
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NULL,
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NULL,
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sizeof (GstPuzzle),
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0,
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gst_puzzle_init,
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};
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puzzle_type = g_type_register_static (GST_TYPE_VIDEOFILTER,
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"GstPuzzle", &puzzle_info, 0);
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}
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return puzzle_type;
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}
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static void
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gst_puzzle_base_init (gpointer g_class)
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{
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static GstElementDetails puzzle_details =
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GST_ELEMENT_DETAILS ("a simple puzzle",
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"Filter/Effect/Video/Games",
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"A simple puzzle, use arrow keys and space to restart/solve",
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"Benjamin Otte <otte@gnome.org>");
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GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
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GstVideofilterClass *videofilter_class = GST_VIDEOFILTER_CLASS (g_class);
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int i;
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GstVideofilterFormat *f;
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gst_element_class_set_details (element_class, &puzzle_details);
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for (i = 0; i < gst_video_format_count; i++) {
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f = g_new0 (GstVideofilterFormat, 1);
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f->fourcc = gst_video_format_list[i].fourcc;
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f->bpp = gst_video_format_list[i].bitspp;
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f->filter_func = draw_puzzle;
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if (gst_video_format_list[i].ext_caps) {
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f->depth = gst_video_format_list[i].depth;
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f->endianness = G_BYTE_ORDER;
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f->red_mask = gst_video_format_list[i].red_mask;
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f->green_mask = gst_video_format_list[i].green_mask;
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f->blue_mask = gst_video_format_list[i].blue_mask;
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}
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gst_videofilter_class_add_format (videofilter_class, f);
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}
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gst_videofilter_class_add_pad_templates (GST_VIDEOFILTER_CLASS (g_class));
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}
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static void
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gst_puzzle_class_init (gpointer g_class, gpointer class_data)
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{
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GObjectClass *gobject_class;
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GstVideofilterClass *videofilter_class;
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gobject_class = G_OBJECT_CLASS (g_class);
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videofilter_class = GST_VIDEOFILTER_CLASS (g_class);
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gobject_class->set_property = gst_puzzle_set_property;
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gobject_class->get_property = gst_puzzle_get_property;
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g_object_class_install_property (gobject_class, ARG_ROWS,
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g_param_spec_uint ("rows", "rows", "number of rows in puzzle",
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1, G_MAXUINT, 4, G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
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g_object_class_install_property (gobject_class, ARG_COLUMNS,
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g_param_spec_uint ("columns", "columns", "number of columns in puzzle",
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1, G_MAXUINT, 4, G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
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videofilter_class->setup = gst_puzzle_setup;
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}
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static void G_GNUC_UNUSED
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gst_puzzle_solve (GstPuzzle * puzzle)
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{
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guint i;
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for (i = 0; i < puzzle->tiles; i++) {
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puzzle->permutation[i] = i;
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}
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puzzle->position = puzzle->tiles - 1;
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puzzle->solved = TRUE;
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}
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static gboolean
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gst_puzzle_is_solved (GstPuzzle * puzzle)
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{
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guint i;
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if (puzzle->position != puzzle->tiles - 1)
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return FALSE;
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for (i = 0; i < puzzle->tiles; i++) {
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if (puzzle->permutation[i] != i)
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return FALSE;
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}
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return TRUE;
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}
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#if 0
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static void
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gst_puzzle_show (GstPuzzle * puzzle)
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{
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guint i;
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for (i = 0; i < puzzle->tiles; i++) {
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g_print ("%d ", puzzle->permutation[i]);
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}
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g_print ("\n");
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}
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#endif
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typedef enum
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{
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DIR_UP,
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DIR_DOWN,
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DIR_LEFT,
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DIR_RIGHT
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} GstPuzzleDirection;
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static void
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gst_puzzle_move (GstPuzzle * puzzle, GstPuzzleDirection dir)
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{
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guint next = puzzle->tiles;
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switch (dir) {
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case DIR_UP:
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if (puzzle->position >= puzzle->columns)
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next = puzzle->position - puzzle->columns;
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break;
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case DIR_DOWN:
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if (puzzle->tiles - puzzle->position > puzzle->columns)
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next = puzzle->position + puzzle->columns;
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break;
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case DIR_LEFT:
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if ((puzzle->position % puzzle->columns) > 0)
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next = puzzle->position - 1;
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break;
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case DIR_RIGHT:
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if ((puzzle->position % puzzle->columns) < puzzle->columns - 1)
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next = puzzle->position + 1;
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break;
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default:
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g_assert_not_reached ();
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}
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if (next < puzzle->tiles) {
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/* the move was valid */
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guint tmp = puzzle->permutation[puzzle->position];
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puzzle->permutation[puzzle->position] = puzzle->permutation[next];
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puzzle->permutation[next] = tmp;
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puzzle->position = next;
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puzzle->solved = gst_puzzle_is_solved (puzzle);
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}
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}
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static void
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gst_puzzle_shuffle (GstPuzzle * puzzle)
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{
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guint i;
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do {
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for (i = 0; i < 100 * puzzle->tiles; i++) {
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gst_puzzle_move (puzzle, g_random_int_range (0, 4));
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}
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} while (gst_puzzle_is_solved (puzzle));
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puzzle->solved = FALSE;
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}
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static gboolean
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nav_event_handler (GstPad * pad, GstEvent * event)
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{
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GstPuzzle *puzzle;
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const gchar *type;
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puzzle = GST_PUZZLE (gst_pad_get_parent (pad));
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_NAVIGATION:
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type = gst_structure_get_string (event->event_data.structure.structure,
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"event");
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if (g_str_equal (type, "key-press")) {
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const gchar *key =
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gst_structure_get_string (event->event_data.structure.structure,
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"key");
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if (g_str_equal (key, "space")) {
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if (gst_puzzle_is_solved (puzzle)) {
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gst_puzzle_shuffle (puzzle);
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} else {
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gst_puzzle_solve (puzzle);
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}
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} else {
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if (puzzle->solved)
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break;
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if (g_str_equal (key, "Left")) {
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gst_puzzle_move (puzzle, DIR_LEFT);
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} else if (g_str_equal (key, "Right")) {
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gst_puzzle_move (puzzle, DIR_RIGHT);
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} else if (g_str_equal (key, "Up")) {
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gst_puzzle_move (puzzle, DIR_UP);
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} else if (g_str_equal (key, "Down")) {
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gst_puzzle_move (puzzle, DIR_DOWN);
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} else {
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break;
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}
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}
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gst_event_unref (event);
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return TRUE;
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}
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break;
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default:
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break;
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}
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return gst_pad_event_default (pad, event);
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}
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static void
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gst_puzzle_init (GTypeInstance * instance, gpointer g_class)
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{
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GstVideofilter *videofilter;
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videofilter = GST_VIDEOFILTER (instance);
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/* FIXME: this is evil */
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gst_pad_set_event_function (videofilter->srcpad, nav_event_handler);
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}
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static void
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gst_puzzle_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstPuzzle *src;
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/* it's not null if we got it, but it might not be ours */
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g_return_if_fail (GST_IS_PUZZLE (object));
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src = GST_PUZZLE (object);
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GST_DEBUG ("gst_puzzle_set_property");
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switch (prop_id) {
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case ARG_COLUMNS:
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src->columns = g_value_get_uint (value);
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src->tiles = src->columns * src->rows;
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break;
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case ARG_ROWS:
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src->rows = g_value_get_uint (value);
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src->tiles = src->columns * src->rows;
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_puzzle_get_property (GObject * object, guint prop_id, GValue * value,
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GParamSpec * pspec)
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{
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GstPuzzle *src;
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/* it's not null if we got it, but it might not be ours */
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g_return_if_fail (GST_IS_PUZZLE (object));
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src = GST_PUZZLE (object);
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switch (prop_id) {
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case ARG_COLUMNS:
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g_value_set_uint (value, src->columns);
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break;
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case ARG_ROWS:
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g_value_set_uint (value, src->rows);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_puzzle_setup (GstVideofilter * videofilter)
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{
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GstPuzzle *puzzle;
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guint i;
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g_return_if_fail (GST_IS_PUZZLE (videofilter));
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puzzle = GST_PUZZLE (videofilter);
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g_free (puzzle->permutation);
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puzzle->permutation = g_new (guint, puzzle->tiles);
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for (i = 0; i < puzzle->tiles; i++) {
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puzzle->permutation[i] = i;
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}
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puzzle->position = puzzle->tiles - 1;
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/* shuffle a bit */
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gst_puzzle_shuffle (puzzle);
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puzzle->format = NULL;
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}
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static void
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draw_puzzle (GstVideofilter * videofilter, void *destp, void *srcp)
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{
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GstPuzzle *puzzle;
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int width, height;
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guint i;
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GstVideoImage dest, src;
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puzzle = GST_PUZZLE (videofilter);
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if (!puzzle->format) {
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puzzle->format =
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gst_video_format_find_by_structure (gst_caps_get_structure
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(gst_pad_get_negotiated_caps (videofilter->sinkpad), 0));
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}
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width = gst_videofilter_get_input_width (videofilter);
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height = gst_videofilter_get_input_height (videofilter);
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gst_video_image_setup (&dest, puzzle->format, destp, width, height);
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gst_video_image_setup (&src, puzzle->format, srcp, width, height);
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if (width % puzzle->columns != 0) {
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guint w = width % puzzle->columns;
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gst_video_image_copy_area (&dest, width - w, 0, &src, width - w, 0, w,
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height);
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}
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if (height % puzzle->rows != 0) {
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guint h = height % puzzle->rows;
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||
|
gst_video_image_copy_area (&dest, 0, height - h, &src, 0, height - h, width,
|
||
|
h);
|
||
|
}
|
||
|
width /= puzzle->columns;
|
||
|
height /= puzzle->rows;
|
||
|
|
||
|
for (i = 0; i < puzzle->tiles; i++) {
|
||
|
if (!puzzle->solved && i == puzzle->position) {
|
||
|
gst_video_image_draw_rectangle (&dest, width * (i % puzzle->columns),
|
||
|
height * (i / puzzle->columns), width, height,
|
||
|
&GST_VIDEO_COLOR_WHITE, TRUE);
|
||
|
} else {
|
||
|
gst_video_image_copy_area (&dest, width * (i % puzzle->columns),
|
||
|
height * (i / puzzle->columns), &src,
|
||
|
width * (puzzle->permutation[i] % puzzle->columns),
|
||
|
height * (puzzle->permutation[i] / puzzle->columns), width, height);
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static gboolean
|
||
|
plugin_init (GstPlugin * plugin)
|
||
|
{
|
||
|
if (!gst_library_load ("gstvideofilter"))
|
||
|
return FALSE;
|
||
|
|
||
|
return gst_element_register (plugin, "puzzle", GST_RANK_NONE,
|
||
|
GST_TYPE_PUZZLE);
|
||
|
}
|
||
|
|
||
|
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
|
||
|
GST_VERSION_MINOR,
|
||
|
"games",
|
||
|
"a collection of games to showcase features",
|
||
|
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE, GST_ORIGIN)
|