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imagefreeze: Passthrough buffer allocations

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This commit is contained in:
Sebastian Dröge 2010-08-10 20:11:26 +02:00
parent b990b0caac
commit 134b1f0eee
1 changed files with 36 additions and 0 deletions
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36
gst/imagefreeze/gstimagefreeze.c
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@ -56,6 +56,8 @@ static gboolean gst_image_freeze_sink_event (GstPad * pad, GstEvent * event);
static gboolean gst_image_freeze_sink_setcaps (GstPad * pad, GstCaps * caps);
static GstCaps *gst_image_freeze_sink_getcaps (GstPad * pad);
static gboolean gst_image_freeze_sink_query (GstPad * pad, GstQuery * query);
static GstFlowReturn gst_image_freeze_sink_bufferalloc (GstPad * pad,
guint64 offset, guint size, GstCaps * caps, GstBuffer ** buf);
static void gst_image_freeze_src_loop (GstPad * pad);
static gboolean gst_image_freeze_src_event (GstPad * pad, GstEvent * event);
static gboolean gst_image_freeze_src_query (GstPad * pad, GstQuery * query);
@ -119,6 +121,8 @@ gst_image_freeze_init (GstImageFreeze * self, GstImageFreezeClass * g_class)
GST_DEBUG_FUNCPTR (gst_image_freeze_sink_setcaps));
gst_pad_set_getcaps_function (self->sinkpad,
GST_DEBUG_FUNCPTR (gst_image_freeze_sink_getcaps));
gst_pad_set_bufferalloc_function (self->sinkpad,
GST_DEBUG_FUNCPTR (gst_image_freeze_sink_bufferalloc));
gst_element_add_pad (GST_ELEMENT (self), self->sinkpad);
self->srcpad = gst_pad_new_from_static_template (&src_pad_template, "src");
@ -305,6 +309,38 @@ gst_image_freeze_sink_query (GstPad * pad, GstQuery * query)
return ret;
}
static GstFlowReturn
gst_image_freeze_sink_bufferalloc (GstPad * pad, guint64 offset, guint size,
GstCaps * caps, GstBuffer ** buf)
{
GstImageFreeze *self = GST_IMAGE_FREEZE (gst_pad_get_parent (pad));
GstFlowReturn ret;
gboolean do_alloc;
GST_LOG_OBJECT (pad, "Allocating buffer with offset 0x%" G_GINT64_MODIFIER
"x and size %u with caps: %" GST_PTR_FORMAT, offset, size, caps);
*buf = NULL;
GST_OBJECT_LOCK (self);
do_alloc = self->buffer == NULL;
GST_OBJECT_UNLOCK (self);
if (do_alloc) {
ret = gst_pad_alloc_buffer (self->srcpad, offset, size, caps, buf);
if (G_UNLIKELY (ret != GST_FLOW_OK))
GST_ERROR_OBJECT (pad, "Allocating buffer failed: %s",
gst_flow_get_name (ret));
} else {
/* In this case GstPad will allocate a buffer for us */
ret = GST_FLOW_OK;
}
gst_object_unref (self);
return ret;
}
static gboolean
gst_image_freeze_convert (GstImageFreeze * self,
GstFormat src_format, gint64 src_value,