gst-libs/gst/vaapi/gstvaapisubpicture.c

   1 /*
   2  *  gstvaapisubpicture.c - VA subpicture abstraction
   3  *
   4  *  gstreamer-vaapi (C) 2010 Splitted-Desktop Systems
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program 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
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
  19  */
  20
  21 /**
  22  * SECTION:gstvaapisubpicture
  23  * @short_description: VA subpicture abstraction
  24  */
  25
  26 #include "config.h"
  27 #include <string.h>
  28 #include "gstvaapicompat.h"
  29 #include "gstvaapiutils.h"
  30 #include "gstvaapisubpicture.h"
  31 #include "gstvaapiobject_priv.h"
  32
  33 #define DEBUG 1
  34 #include "gstvaapidebug.h"
  35
  36 G_DEFINE_TYPE(GstVaapiSubpicture, gst_vaapi_subpicture, GST_VAAPI_TYPE_OBJECT);
  37
  38 #define GST_VAAPI_SUBPICTURE_GET_PRIVATE(obj)                   \
  39     (G_TYPE_INSTANCE_GET_PRIVATE((obj),                         \
  40                                  GST_VAAPI_TYPE_SUBPICTURE,     \
  41                                  GstVaapiSubpicturePrivate))
  42
  43 struct _GstVaapiSubpicturePrivate {
  44     GstVaapiImage      *image;
  45 };
  46
  47 enum {
  48     PROP_0,
  49
  50     PROP_IMAGE
  51 };
  52
  53 static void
  54 gst_vaapi_subpicture_destroy(GstVaapiSubpicture *subpicture)
  55 {
  56     GstVaapiDisplay * const display = GST_VAAPI_OBJECT_DISPLAY(subpicture);
  57     GstVaapiSubpicturePrivate * const priv = subpicture->priv;
  58     VASubpictureID subpicture_id;
  59     VAStatus status;
  60
  61     subpicture_id = GST_VAAPI_OBJECT_ID(subpicture);
  62     GST_DEBUG("subpicture %" GST_VAAPI_ID_FORMAT,
  63               GST_VAAPI_ID_ARGS(subpicture_id));
  64
  65     if (subpicture_id != VA_INVALID_ID) {
  66         if (display) {
  67             GST_VAAPI_DISPLAY_LOCK(display);
  68             status = vaDestroySubpicture(
  69                 GST_VAAPI_DISPLAY_VADISPLAY(display),
  70                 subpicture_id
  71             );
  72             GST_VAAPI_DISPLAY_UNLOCK(display);
  73             if (!vaapi_check_status(status, "vaDestroySubpicture()"))
  74                 g_warning("failed to destroy subpicture %" GST_VAAPI_ID_FORMAT,
  75                           GST_VAAPI_ID_ARGS(subpicture_id));
  76         }
  77         GST_VAAPI_OBJECT_ID(subpicture) = VA_INVALID_ID;
  78     }
  79
  80     if (priv->image) {
  81         g_object_unref(priv->image);
  82         priv->image = NULL;
  83     }
  84 }
  85
  86 static gboolean
  87 gst_vaapi_subpicture_create(GstVaapiSubpicture *subpicture)
  88 {
  89     GstVaapiDisplay * const display = GST_VAAPI_OBJECT_DISPLAY(subpicture);
  90     GstVaapiSubpicturePrivate * const priv = subpicture->priv;
  91     VASubpictureID subpicture_id;
  92     VAStatus status;
  93
  94     if (!priv->image)
  95         return FALSE;
  96
  97     GST_VAAPI_DISPLAY_LOCK(display);
  98     status = vaCreateSubpicture(
  99         GST_VAAPI_DISPLAY_VADISPLAY(display),
 100         GST_VAAPI_OBJECT_ID(priv->image),
 101         &subpicture_id
 102     );
 103     GST_VAAPI_DISPLAY_UNLOCK(display);
 104     if (!vaapi_check_status(status, "vaCreateSubpicture()"))
 105         return FALSE;
 106
 107     GST_DEBUG("subpicture %" GST_VAAPI_ID_FORMAT,
 108               GST_VAAPI_ID_ARGS(subpicture_id));
 109     GST_VAAPI_OBJECT_ID(subpicture) = subpicture_id;
 110     return TRUE;
 111 }
 112
 113 static void
 114 gst_vaapi_subpicture_finalize(GObject *object)
 115 {
 116     gst_vaapi_subpicture_destroy(GST_VAAPI_SUBPICTURE(object));
 117
 118     G_OBJECT_CLASS(gst_vaapi_subpicture_parent_class)->finalize(object);
 119 }
 120
 121 static void
 122 gst_vaapi_subpicture_set_property(
 123     GObject      *object,
 124     guint         prop_id,
 125     const GValue *value,
 126     GParamSpec   *pspec
 127 )
 128 {
 129     GstVaapiSubpicture * const subpicture = GST_VAAPI_SUBPICTURE(object);
 130
 131     switch (prop_id) {
 132     case PROP_IMAGE:
 133         gst_vaapi_subpicture_set_image(subpicture, g_value_get_object(value));
 134         break;
 135     default:
 136         G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
 137         break;
 138     }
 139 }
 140
 141 static void
 142 gst_vaapi_subpicture_get_property(
 143     GObject    *object,
 144     guint       prop_id,
 145     GValue     *value,
 146     GParamSpec *pspec
 147 )
 148 {
 149     GstVaapiSubpicture * const subpicture = GST_VAAPI_SUBPICTURE(object);
 150
 151     switch (prop_id) {
 152     case PROP_IMAGE:
 153         g_value_set_object(value, gst_vaapi_subpicture_get_image(subpicture));
 154         break;
 155     default:
 156         G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
 157         break;
 158     }
 159 }
 160
 161 static void
 162 gst_vaapi_subpicture_class_init(GstVaapiSubpictureClass *klass)
 163 {
 164     GObjectClass * const object_class = G_OBJECT_CLASS(klass);
 165
 166     g_type_class_add_private(klass, sizeof(GstVaapiSubpicturePrivate));
 167
 168     object_class->finalize     = gst_vaapi_subpicture_finalize;
 169     object_class->set_property = gst_vaapi_subpicture_set_property;
 170     object_class->get_property = gst_vaapi_subpicture_get_property;
 171
 172     /**
 173      * GstVaapiSubpicture:image:
 174      *
 175      * The #GstVaapiImage this subpicture is bound to.
 176      */
 177     g_object_class_install_property
 178         (object_class,
 179          PROP_IMAGE,
 180          g_param_spec_object("image",
 181                              "Image",
 182                              "The GstVaapiImage this subpicture is bound to",
 183                              GST_VAAPI_TYPE_IMAGE,
 184                              G_PARAM_READWRITE));
 185 }
 186
 187 static void
 188 gst_vaapi_subpicture_init(GstVaapiSubpicture *subpicture)
 189 {
 190     GstVaapiSubpicturePrivate *priv = GST_VAAPI_SUBPICTURE_GET_PRIVATE(subpicture);
 191
 192     subpicture->priv    = priv;
 193     priv->image         = NULL;
 194 }
 195
 196 /**
 197  * gst_vaapi_subpicture_new:
 198  * @image: a #GstVaapiImage
 199  *
 200  * Creates a new #GstVaapiSubpicture with @image as source pixels. The
 201  * newly created object holds a reference on @image.
 202  *
 203  * Return value: the newly allocated #GstVaapiSubpicture object
 204  */
 205 GstVaapiSubpicture *
 206 gst_vaapi_subpicture_new(GstVaapiImage *image)
 207 {
 208     g_return_val_if_fail(GST_VAAPI_IS_IMAGE(image), NULL);
 209
 210     GST_DEBUG("create from image %" GST_VAAPI_ID_FORMAT,
 211               GST_VAAPI_ID_ARGS(GST_VAAPI_OBJECT_ID(image)));
 212
 213     return g_object_new(GST_VAAPI_TYPE_SUBPICTURE,
 214                         "display", GST_VAAPI_OBJECT_DISPLAY(image),
 215                         "id",      GST_VAAPI_ID(VA_INVALID_ID),
 216                         "image",   image,
 217                         NULL);
 218 }
 219
 220 /**
 221  * gst_vaapi_subpicture_get_id:
 222  * @subpicture: a #GstVaapiSubpicture
 223  *
 224  * Returns the underlying VASubpictureID of the @subpicture.
 225  *
 226  * Return value: the underlying VA subpicture id
 227  */
 228 VASubpictureID
 229 gst_vaapi_subpicture_get_id(GstVaapiSubpicture *subpicture)
 230 {
 231     g_return_val_if_fail(GST_VAAPI_IS_SUBPICTURE(subpicture), VA_INVALID_ID);
 232
 233     return GST_VAAPI_OBJECT_ID(subpicture);
 234 }
 235
 236 /**
 237  * gst_vaapi_subpicture_get_image:
 238  * @subpicture: a #GstVaapiSubpicture
 239  *
 240  * Returns the #GstVaapiImage this @subpicture is bound to.
 241  *
 242  * Return value: the #GstVaapiImage this @subpicture is bound to
 243  */
 244 GstVaapiImage *
 245 gst_vaapi_subpicture_get_image(GstVaapiSubpicture *subpicture)
 246 {
 247     g_return_val_if_fail(GST_VAAPI_IS_SUBPICTURE(subpicture), NULL);
 248
 249     return subpicture->priv->image;
 250 }
 251
 252 /**
 253  * gst_vaapi_subpicture_set_image:
 254  * @subpicture: a #GstVaapiSubpicture
 255  * @image: a #GstVaapiImage
 256  *
 257  * Binds a new #GstVaapiImage to the @subpicture. The reference to the
 258  * previous image is released a new one acquired on @image.
 259  */
 260 void
 261 gst_vaapi_subpicture_set_image(
 262     GstVaapiSubpicture *subpicture,
 263     GstVaapiImage      *image
 264 )
 265 {
 266     g_return_if_fail(GST_VAAPI_IS_SUBPICTURE(subpicture));
 267     g_return_if_fail(GST_VAAPI_IS_IMAGE(image));
 268
 269     gst_vaapi_subpicture_destroy(subpicture);
 270
 271     subpicture->priv->image = g_object_ref(image);
 272     gst_vaapi_subpicture_create(subpicture);
 273 }