gst-libs/gst/vaapi/gstvaapiimagepool.c

   1 /*
   2  *  gstvaapiimagepool.c - Gst VA image pool
   3  *
   4  *  Copyright (C) 2010-2011 Splitted-Desktop Systems
   5  *
   6  *  This library is free software; you can redistribute it and/or
   7  *  modify it under the terms of the GNU Lesser General Public License
   8  *  as published by the Free Software Foundation; either version 2.1
   9  *  of the License, or (at your option) any later version.
  10  *
  11  *  This library is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  *  Lesser General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU Lesser General Public
  17  *  License along with this library; if not, write to the Free
  18  *  Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  19  *  Boston, MA 02110-1301 USA
  20  */
  21
  22 /**
  23  * SECTION:gstvaapiimagepool
  24  * @short_description: VA image pool
  25  */
  26
  27 #include "sysdeps.h"
  28 #include "gstvaapiimagepool.h"
  29
  30 #define DEBUG 1
  31 #include "gstvaapidebug.h"
  32
  33 G_DEFINE_TYPE(
  34     GstVaapiImagePool,
  35     gst_vaapi_image_pool,
  36     GST_VAAPI_TYPE_VIDEO_POOL);
  37
  38 #define GST_VAAPI_IMAGE_POOL_GET_PRIVATE(obj)                   \
  39     (G_TYPE_INSTANCE_GET_PRIVATE((obj),                         \
  40                                  GST_VAAPI_TYPE_IMAGE_POOL,     \
  41                                  GstVaapiImagePoolPrivate))
  42
  43 struct _GstVaapiImagePoolPrivate {
  44     GstVaapiImageFormat format;
  45     guint               width;
  46     guint               height;
  47 };
  48
  49 static void
  50 gst_vaapi_image_pool_set_caps(GstVaapiVideoPool *pool, GstCaps *caps)
  51 {
  52     GstVaapiImagePoolPrivate * const priv = GST_VAAPI_IMAGE_POOL(pool)->priv;
  53     GstStructure *structure;
  54     gint width, height;
  55
  56     structure = gst_caps_get_structure(caps, 0);
  57     gst_structure_get_int(structure, "width", &width);
  58     gst_structure_get_int(structure, "height", &height);
  59
  60     priv->format        = gst_vaapi_image_format_from_caps(caps);
  61     priv->width         = width;
  62     priv->height        = height;
  63 }
  64
  65 gpointer
  66 gst_vaapi_image_pool_alloc_object(
  67     GstVaapiVideoPool *pool,
  68     GstVaapiDisplay   *display
  69 )
  70 {
  71     GstVaapiImagePoolPrivate * const priv = GST_VAAPI_IMAGE_POOL(pool)->priv;
  72
  73     return gst_vaapi_image_new(display,
  74                                priv->format,
  75                                priv->width,
  76                                priv->height);
  77 }
  78
  79 static void
  80 gst_vaapi_image_pool_finalize(GObject *object)
  81 {
  82     G_OBJECT_CLASS(gst_vaapi_image_pool_parent_class)->finalize(object);
  83 }
  84
  85 static void
  86 gst_vaapi_image_pool_class_init(GstVaapiImagePoolClass *klass)
  87 {
  88     GObjectClass * const object_class = G_OBJECT_CLASS(klass);
  89     GstVaapiVideoPoolClass * const pool_class = GST_VAAPI_VIDEO_POOL_CLASS(klass);
  90
  91     g_type_class_add_private(klass, sizeof(GstVaapiImagePoolPrivate));
  92
  93     object_class->finalize      = gst_vaapi_image_pool_finalize;
  94
  95     pool_class->set_caps        = gst_vaapi_image_pool_set_caps;
  96     pool_class->alloc_object    = gst_vaapi_image_pool_alloc_object;
  97 }
  98
  99 static void
 100 gst_vaapi_image_pool_init(GstVaapiImagePool *pool)
 101 {
 102     GstVaapiImagePoolPrivate *priv = GST_VAAPI_IMAGE_POOL_GET_PRIVATE(pool);
 103
 104     pool->priv          = priv;
 105     priv->format        = 0;
 106     priv->width         = 0;
 107     priv->height        = 0;
 108 }
 109
 110 /**
 111  * gst_vaapi_image_pool_new:
 112  * @display: a #GstVaapiDisplay
 113  * @caps: a #GstCaps
 114  *
 115  * Creates a new #GstVaapiVideoPool of #GstVaapiImage with the
 116  * specified dimensions in @caps.
 117  *
 118  * Return value: the newly allocated #GstVaapiVideoPool
 119  */
 120 GstVaapiVideoPool *
 121 gst_vaapi_image_pool_new(GstVaapiDisplay *display, GstCaps *caps)
 122 {
 123     return g_object_new(GST_VAAPI_TYPE_IMAGE_POOL,
 124                         "display", display,
 125                         "caps",    caps,
 126                         NULL);
 127 }