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display: add utility function to query VA driver name.

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Add gst_vaapi_display_get_vendor_string() helper function to query
the underlying VA driver name. The display object owns the resulting
string, so it shall not be deallocated.

That function is thread-safe. It could be used for debugging purposes,
for instance.
This commit is contained in:
Gwenole Beauchesne 2014-05-20 11:36:40 +02:00
parent 71053228b3
commit c0993182bd
3 changed files with 45 additions and 0 deletions
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41
gst-libs/gst/vaapi/gstvaapidisplay.c
View file

@ -854,6 +854,9 @@ gst_vaapi_display_destroy (GstVaapiDisplay * display)
klass->close_display (display);
}
g_free (priv->vendor_string);
priv->vendor_string = NULL;
gst_vaapi_display_replace_internal (&priv->parent, NULL);
g_mutex_lock (&g_display_cache_lock);
@ -2031,3 +2034,41 @@ set_color_balance (GstVaapiDisplay * display, guint prop_id, gfloat v)
return FALSE;
return TRUE;
}
/* Ensures the VA driver vendor string was copied */
static gboolean
ensure_vendor_string (GstVaapiDisplay * display)
{
GstVaapiDisplayPrivate *const priv = GST_VAAPI_DISPLAY_GET_PRIVATE (display);
const gchar *vendor_string;
GST_VAAPI_DISPLAY_LOCK (display);
if (!priv->vendor_string) {
vendor_string = vaQueryVendorString (priv->display);
if (vendor_string)
priv->vendor_string = g_strdup (vendor_string);
}
GST_VAAPI_DISPLAY_UNLOCK (display);
return priv->vendor_string != NULL;
}
/**
* gst_vaapi_display_get_vendor_string:
* @display: a #GstVaapiDisplay
*
* Returns the VA driver vendor string attached to the supplied VA @display.
* The @display owns the vendor string, do *not* de-allocate it.
*
* This function is thread safe.
*
* Return value: the current #GstVaapiRotation value
*/
const gchar *
gst_vaapi_display_get_vendor_string (GstVaapiDisplay * display)
{
g_return_val_if_fail (display != NULL, NULL);
if (!ensure_vendor_string (display))
return NULL;
return display->priv.vendor_string;
}

3
gst-libs/gst/vaapi/gstvaapidisplay.h
View file

@ -198,6 +198,9 @@ gboolean
gst_vaapi_display_set_rotation (GstVaapiDisplay * display,
GstVaapiRotation rotation);
const gchar *
gst_vaapi_display_get_vendor_string (GstVaapiDisplay * display);
G_END_DECLS
#endif /* GST_VAAPI_DISPLAY_H */

1
gst-libs/gst/vaapi/gstvaapidisplay_priv.h
View file

@ -156,6 +156,7 @@ struct _GstVaapiDisplayPrivate
GArray *image_formats;
GArray *subpicture_formats;
GArray *properties;
gchar *vendor_string;
guint use_foreign_display:1;
guint has_vpp:1;
guint has_profiles:1;