gstreamer/gst/smpte/gstmask.c

/* GStreamer
 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
 *
 * 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., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */


#include "gstmask.h"

extern void _gst_barboxwipes_register (void);

static GList *masks = NULL;

void
_gst_mask_init (void)
{
  _gst_barboxwipes_register ();
}

static gint
gst_mask_compare (GstMaskDefinition *def1,
		  GstMaskDefinition *def2)
{
  return (def1->type - def2->type);
}

void
_gst_mask_register (GstMaskDefinition *definition)
{
  masks = g_list_insert_sorted (masks, definition, (GCompareFunc) gst_mask_compare);
}

const GList*
gst_mask_get_definitions (void)
{
  return masks;
}

static GstMaskDefinition*
gst_mask_find_definition (gint type)
{
  GList *walk = masks;

  while (walk) {
    GstMaskDefinition *def = (GstMaskDefinition *) walk->data;

    if (def->type == type)
      return def;
    
    walk = g_list_next (walk);
  }
  return NULL;
}

GstMask*
gst_mask_factory_new (gint type, gint bpp, gint width, gint height)
{
  GstMaskDefinition *definition;
  GstMask *mask = NULL;

  definition = gst_mask_find_definition (type);
  if (definition) {
    mask = definition->new_func (definition, bpp, width, height);
  }

  return mask;
}

GstMask*
_gst_mask_default_new (GstMaskDefinition *definition,
		       gint bpp, gint width, gint height)
{
  GstMask *mask;

  mask = g_new0 (GstMask, 1);

  mask->type = definition->type;
  mask->bpp = bpp;
  mask->width = width;
  mask->height = height;
  mask->update_func = definition->update_func;
  mask->destroy_func = definition->destroy_func;
  mask->data = g_malloc (width * height * (bpp+7)>>3);
  
  return mask;
}

void
_gst_mask_default_destroy (GstMask *mask)
{
  g_free (mask->data);
  g_free (mask);
}

void
gst_mask_destroy (GstMask *mask)
{
  if (mask->destroy_func)
    mask->destroy_func (mask);
}

void
gst_mask_update (GstMask *mask,
		 GstClockTime position, 
		 GstClockTime duration)
{
  g_return_if_fail (mask != NULL);

  if (mask->update_func)
    mask->update_func (mask, position, duration);
}