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textoverlay: Always hold the class-global pango mutex when using pango API

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This commit is contained in:
Sebastian Dröge 2011-04-16 16:31:57 +02:00
parent d2ce491153
commit 1312605eac
1 changed files with 21 additions and 2 deletions
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23
ext/pango/gsttextoverlay.c
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@ -372,9 +372,16 @@ gst_text_overlay_base_init (gpointer g_class)
"Adds text strings on top of a video buffer",
"David Schleef <ds@schleef.org>, " "Zeeshan Ali <zeeshan.ali@nokia.com>");
/* Only lock for the subclasses here, the base class
* doesn't have this mutex yet and it's not necessary
* here */
if (klass->pango_lock)
g_mutex_lock (klass->pango_lock);
fontmap = pango_cairo_font_map_get_default ();
klass->pango_context =
pango_cairo_font_map_create_context (PANGO_CAIRO_FONT_MAP (fontmap));
if (klass->pango_lock)
g_mutex_unlock (klass->pango_lock);
}
static gchar *
@ -627,6 +634,7 @@ gst_text_overlay_init (GstTextOverlay * overlay, GstTextOverlayClass * klass)
gst_element_add_pad (GST_ELEMENT (overlay), overlay->srcpad);
overlay->line_align = DEFAULT_PROP_LINE_ALIGNMENT;
g_mutex_lock (GST_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
overlay->layout =
pango_layout_new (GST_TEXT_OVERLAY_GET_CLASS (overlay)->pango_context);
desc =
@ -665,6 +673,7 @@ gst_text_overlay_init (GstTextOverlay * overlay, GstTextOverlayClass * klass)
overlay->text_linked = FALSE;
overlay->cond = g_cond_new ();
gst_segment_init (&overlay->segment, GST_FORMAT_TIME);
g_mutex_unlock (GST_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
}
static void
@ -762,7 +771,9 @@ gst_text_overlay_setcaps (GstPad * pad, GstCaps * caps)
if (ret) {
GST_OBJECT_LOCK (overlay);
g_mutex_lock (GST_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
gst_text_overlay_update_wrap_mode (overlay);
g_mutex_unlock (GST_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
GST_OBJECT_UNLOCK (overlay);
}
@ -841,7 +852,9 @@ gst_text_overlay_set_property (GObject * object, guint prop_id,
break;
case PROP_WRAP_MODE:
overlay->wrap_mode = g_value_get_enum (value);
g_mutex_lock (GST_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
gst_text_overlay_update_wrap_mode (overlay);
g_mutex_unlock (GST_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
break;
case PROP_FONT_DESC:
{
@ -849,6 +862,7 @@ gst_text_overlay_set_property (GObject * object, guint prop_id,
const gchar *fontdesc_str;
fontdesc_str = g_value_get_string (value);
g_mutex_lock (GST_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
desc = pango_font_description_from_string (fontdesc_str);
if (desc) {
GST_LOG_OBJECT (overlay, "font description set: %s", fontdesc_str);
@ -859,6 +873,7 @@ gst_text_overlay_set_property (GObject * object, guint prop_id,
GST_WARNING_OBJECT (overlay, "font description parse failed: %s",
fontdesc_str);
}
g_mutex_unlock (GST_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
break;
}
case PROP_COLOR:
@ -869,8 +884,10 @@ gst_text_overlay_set_property (GObject * object, guint prop_id,
break;
case PROP_LINE_ALIGNMENT:
overlay->line_align = g_value_get_enum (value);
g_mutex_lock (GST_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
pango_layout_set_alignment (overlay->layout,
(PangoAlignment) overlay->line_align);
g_mutex_unlock (GST_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
break;
case PROP_WAIT_TEXT:
overlay->wait_text = g_value_get_boolean (value);
@ -881,7 +898,9 @@ gst_text_overlay_set_property (GObject * object, guint prop_id,
break;
case PROP_VERTICAL_RENDER:
overlay->use_vertical_render = g_value_get_boolean (value);
g_mutex_lock (GST_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
gst_text_overlay_update_render_mode (overlay);
g_mutex_unlock (GST_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
overlay->need_render = TRUE;
break;
default:
@ -1323,8 +1342,6 @@ gst_text_overlay_render_pangocairo (GstTextOverlay * overlay,
cairo_matrix_init_scale (&cairo_matrix, scalef, scalef);
}
g_mutex_unlock (GST_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
/* reallocate surface */
overlay->text_image = g_realloc (overlay->text_image, 4 * width * height);
@ -1387,6 +1404,8 @@ gst_text_overlay_render_pangocairo (GstTextOverlay * overlay,
overlay->image_width = width;
overlay->image_height = height;
overlay->baseline_y = ink_rect.y;
g_mutex_unlock (GST_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
}
#define BOX_XPAD 6