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wayland: mangle display name for cache lookups.

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This commit is contained in:
Gwenole Beauchesne 2012-07-24 19:58:55 +02:00
parent 95b7d5a6e6
commit 5be6de20cb
1 changed files with 69 additions and 26 deletions
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97
gst-libs/gst/vaapi/gstvaapidisplay_wayland.c
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@ -44,6 +44,15 @@ enum {
PROP_WL_DISPLAY
};
#define NAME_PREFIX "WLD:"
#define NAME_PREFIX_LENGTH 4
static inline gboolean
is_display_name(const gchar *display_name)
{
return strncmp(display_name, NAME_PREFIX, NAME_PREFIX_LENGTH) == 0;
}
static inline const gchar *
get_default_display_name(void)
{
@ -54,28 +63,39 @@ get_default_display_name(void)
return g_display_name;
}
static inline guint
get_display_name_length(const gchar *display_name)
{
const gchar *str;
str = strchr(display_name, '-');
if (str)
return str - display_name;
return strlen(display_name);
}
static gboolean
compare_display_name(gconstpointer a, gconstpointer b, gpointer user_data)
{
const gchar *display_name;
const gchar *cached_name = a;
const gchar *tested_name = b;
guint cached_name_length, tested_name_length;
/* XXX: handle screen number? */
if (a && b)
return strcmp(a, b) == 0;
/* Match "" or default display name */
if (a)
display_name = a;
else if (b)
display_name = b;
else
return TRUE;
if (*display_name == '\0')
return TRUE;
if (strcmp(display_name, get_default_display_name()) == 0)
return TRUE;
if (!cached_name || !is_display_name(cached_name))
return FALSE;
cached_name += NAME_PREFIX_LENGTH;
cached_name_length = get_display_name_length(cached_name);
g_return_val_if_fail(tested_name && is_display_name(tested_name), FALSE);
tested_name += NAME_PREFIX_LENGTH;
tested_name_length = get_display_name_length(tested_name);
/* XXX: handle screen number and default WAYLAND_DISPLAY name */
if (cached_name_length != tested_name_length)
return FALSE;
if (strncmp(cached_name, tested_name, cached_name_length) != 0)
return FALSE;
return TRUE;
}
static void
@ -84,6 +104,29 @@ gst_vaapi_display_wayland_finalize(GObject *object)
G_OBJECT_CLASS(gst_vaapi_display_wayland_parent_class)->finalize(object);
}
/* Reconstruct a display name without our prefix */
static const gchar *
get_display_name(gpointer ptr)
{
GstVaapiDisplayWayland * const display = GST_VAAPI_DISPLAY_WAYLAND(ptr);
const gchar *display_name = display->priv->display_name;
if (!display_name)
return NULL;
if (is_display_name(display_name)) {
display_name += NAME_PREFIX_LENGTH;
if (*display_name == '\0')
return NULL;
return display_name;
}
/* XXX: this should not happen */
g_assert(0 && "display name without prefix");
return display_name;
}
/* Mangle display name with our prefix */
static void
set_display_name(GstVaapiDisplayWayland *display, const gchar *display_name)
{
@ -91,10 +134,12 @@ set_display_name(GstVaapiDisplayWayland *display, const gchar *display_name)
g_free(priv->display_name);
if (display_name)
priv->display_name = g_strdup(display_name);
else
priv->display_name = NULL;
if (!display_name) {
display_name = get_default_display_name();
if (!display_name)
display_name = "";
}
priv->display_name = g_strdup_printf("%s%s", NAME_PREFIX, display_name);
}
static void
@ -131,7 +176,7 @@ gst_vaapi_display_wayland_get_property(
switch (prop_id) {
case PROP_DISPLAY_NAME:
g_value_set_string(value, display->priv->display_name);
g_value_set_string(value, get_display_name(display));
break;
case PROP_WL_DISPLAY:
g_value_set_pointer(value, gst_vaapi_display_wayland_get_display(display));
@ -150,7 +195,6 @@ gst_vaapi_display_wayland_constructed(GObject *object)
GstVaapiDisplayCache * const cache = gst_vaapi_display_get_cache();
const GstVaapiDisplayInfo *info;
GObjectClass *parent_class;
const gchar *display_name;
priv->create_display = priv->wl_display == NULL;
@ -169,10 +213,9 @@ gst_vaapi_display_wayland_constructed(GObject *object)
/* Reset display-name if the user provided his own Wayland display */
if (!priv->create_display) {
/* XXX: get socket name */
/* XXX: how to get socket/display name? */
GST_WARNING("wayland: get display name");
display_name = NULL;
set_display_name(display, display_name);
set_display_name(display, NULL);
}
parent_class = G_OBJECT_CLASS(gst_vaapi_display_wayland_parent_class);
@ -215,7 +258,7 @@ gst_vaapi_display_wayland_open_display(GstVaapiDisplay * display)
if (!priv->create_display)
return priv->wl_display != NULL;
priv->wl_display = wl_display_connect(priv->display_name);
priv->wl_display = wl_display_connect(get_display_name(display));
if (!priv->wl_display)
return FALSE;