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textoverlay: Proxy buffer allocation on the video sinkpad to the srcpad

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This commit is contained in:
Sebastian Dröge 2009-12-09 09:35:14 +01:00
parent bc1302cf8e
commit d5205bb0fa
1 changed files with 25 additions and 0 deletions
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25
ext/pango/gsttextoverlay.c
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@ -297,6 +297,8 @@ static gboolean gst_text_overlay_src_query (GstPad * pad, GstQuery * query);
static gboolean gst_text_overlay_video_event (GstPad * pad, GstEvent * event);
static GstFlowReturn gst_text_overlay_video_chain (GstPad * pad,
GstBuffer * buffer);
static GstFlowReturn gst_text_overlay_video_bufferalloc (GstPad * pad,
guint64 offset, guint size, GstCaps * caps, GstBuffer ** buffer);
static gboolean gst_text_overlay_text_event (GstPad * pad, GstEvent * event);
static GstFlowReturn gst_text_overlay_text_chain (GstPad * pad,
@ -520,6 +522,8 @@ gst_text_overlay_init (GstTextOverlay * overlay, GstTextOverlayClass * klass)
GST_DEBUG_FUNCPTR (gst_text_overlay_video_event));
gst_pad_set_chain_function (overlay->video_sinkpad,
GST_DEBUG_FUNCPTR (gst_text_overlay_video_chain));
gst_pad_set_bufferalloc_function (overlay->video_sinkpad,
GST_DEBUG_FUNCPTR (gst_text_overlay_video_bufferalloc));
gst_element_add_pad (GST_ELEMENT (overlay), overlay->video_sinkpad);
if (!GST_IS_TIME_OVERLAY_CLASS (klass) && !GST_IS_CLOCK_OVERLAY_CLASS (klass)) {
@ -1843,6 +1847,27 @@ gst_text_overlay_video_event (GstPad * pad, GstEvent * event)
return ret;
}
static GstFlowReturn
gst_text_overlay_video_bufferalloc (GstPad * pad, guint64 offset, guint size,
GstCaps * caps, GstBuffer ** buffer)
{
GstTextOverlay *overlay = GST_TEXT_OVERLAY (gst_pad_get_parent (pad));
GstFlowReturn ret = GST_FLOW_WRONG_STATE;
GstPad *allocpad;
GST_OBJECT_LOCK (overlay);
allocpad = overlay->srcpad ? gst_object_ref (overlay->srcpad) : NULL;
GST_OBJECT_UNLOCK (overlay);
if (allocpad) {
ret = gst_pad_alloc_buffer (allocpad, offset, size, caps, buffer);
gst_object_unref (allocpad);
}
gst_object_unref (overlay);
return ret;
}
/* Called with lock held */
static void
gst_text_overlay_pop_text (GstTextOverlay * overlay)