/*
 *  gstvaapiimagepool.c - Gst VA image pool
 *
 *  Copyright (C) 2010-2011 Splitted-Desktop Systems
 *    Author: Gwenole Beauchesne <gwenole.beauchesne@splitted-desktop.com>
 *  Copyright (C) 2012-2013 Intel Corporation
 *    Author: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
 *
 *  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 2.1
 *  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., 51 Franklin Street, Fifth Floor,
 *  Boston, MA 02110-1301 USA
 */

/**
 * SECTION:gstvaapiimagepool
 * @short_description: VA image pool
 */

#include "sysdeps.h"
#include "gstvaapiimagepool.h"
#include "gstvaapivideopool_priv.h"

#define DEBUG 1
#include "gstvaapidebug.h"

/**
 * GstVaapiImagePool:
 *
 * A pool of lazily allocated #GstVaapiImage objects.
 */
struct _GstVaapiImagePool
{
  /*< private > */
  GstVaapiVideoPool parent_instance;

  GstVideoFormat format;
  guint width;
  guint height;
};

static gboolean
image_pool_init (GstVaapiVideoPool * base_pool, const GstVideoInfo * vip)
{
  GstVaapiImagePool *const pool = GST_VAAPI_IMAGE_POOL (base_pool);

  pool->format = GST_VIDEO_INFO_FORMAT (vip);
  pool->width = GST_VIDEO_INFO_WIDTH (vip);
  pool->height = GST_VIDEO_INFO_HEIGHT (vip);
  return gst_vaapi_display_has_image_format (base_pool->display, pool->format);
}

static gpointer
gst_vaapi_image_pool_alloc_object (GstVaapiVideoPool * base_pool)
{
  GstVaapiImagePool *const pool = GST_VAAPI_IMAGE_POOL (base_pool);

  return gst_vaapi_image_new (base_pool->display, pool->format,
      pool->width, pool->height);
}

static inline const GstVaapiMiniObjectClass *
gst_vaapi_image_pool_class (void)
{
  static const GstVaapiVideoPoolClass GstVaapiImagePoolClass = {
    {sizeof (GstVaapiImagePool),
     (GDestroyNotify) gst_vaapi_video_pool_finalize},
    .alloc_object = gst_vaapi_image_pool_alloc_object
  };
  return GST_VAAPI_MINI_OBJECT_CLASS (&GstVaapiImagePoolClass);
}

/**
 * gst_vaapi_image_pool_new:
 * @display: a #GstVaapiDisplay
 * @vip: the #GstVideoInfo
 *
 * Creates a new #GstVaapiVideoPool of #GstVaapiImage with the
 * specified format and dimensions in @vip.
 *
 * Return value: the newly allocated #GstVaapiVideoPool
 */
GstVaapiVideoPool *
gst_vaapi_image_pool_new (GstVaapiDisplay * display, const GstVideoInfo * vip)
{
  GstVaapiVideoPool *pool;

  g_return_val_if_fail (display != NULL, NULL);
  g_return_val_if_fail (vip != NULL, NULL);

  pool = (GstVaapiVideoPool *)
      gst_vaapi_mini_object_new (gst_vaapi_image_pool_class ());
  if (!pool)
    return NULL;

  gst_vaapi_video_pool_init (pool, display,
      GST_VAAPI_VIDEO_POOL_OBJECT_TYPE_IMAGE);

  if (!image_pool_init (pool, vip))
    goto error;
  return pool;

error:
  gst_vaapi_mini_object_unref (GST_VAAPI_MINI_OBJECT (pool));
  return NULL;
}