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visual: add bufferpool support to libvisual

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This commit is contained in:
Wim Taymans 2011-04-29 18:23:25 +02:00
parent d6f8fb62c5
commit 16d8fb2c2f
1 changed files with 54 additions and 9 deletions
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63
ext/libvisual/visual.c
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@ -74,6 +74,7 @@ struct _GstVisual
gint height;
GstClockTime duration;
guint outsize;
GstBufferPool *pool;
/* samples per frame based on caps */
guint spf;
@ -128,7 +129,7 @@ static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
static void gst_visual_class_init (gpointer g_class, gpointer class_data);
static void gst_visual_init (GstVisual * visual);
static void gst_visual_dispose (GObject * object);
static void gst_visual_finalize (GObject * object);
static GstStateChangeReturn gst_visual_change_state (GstElement * element,
GstStateChange transition);
@ -198,6 +199,7 @@ gst_visual_class_init (gpointer g_class, gpointer class_data)
gst_static_pad_template_get (&src_template));
gst_element_class_add_pad_template (element,
gst_static_pad_template_get (&sink_template));
gst_element_class_set_details_simple (element,
longname, "Visualization",
klass->plugin->info->about, "Benjamin Otte <otte@gnome.org>");
@ -205,7 +207,7 @@ gst_visual_class_init (gpointer g_class, gpointer class_data)
g_free (longname);
}
object->dispose = gst_visual_dispose;
object->finalize = gst_visual_finalize;
}
static void
@ -246,17 +248,15 @@ gst_visual_clear_actors (GstVisual * visual)
}
static void
gst_visual_dispose (GObject * object)
gst_visual_finalize (GObject * object)
{
GstVisual *visual = GST_VISUAL (object);
if (visual->adapter) {
g_object_unref (visual->adapter);
visual->adapter = NULL;
}
g_object_unref (visual->adapter);
gst_object_unref (visual->pool);
gst_visual_clear_actors (visual);
GST_CALL_PARENT (G_OBJECT_CLASS, dispose, (object));
GST_CALL_PARENT (G_OBJECT_CLASS, finalize, (object));
}
static void
@ -393,6 +393,9 @@ gst_vis_src_negotiate (GstVisual * visual)
GstCaps *othercaps, *target;
GstStructure *structure;
GstCaps *caps;
GstQuery *query;
GstBufferPool *pool = NULL;
guint alignment, prefix, size;
caps = gst_pad_get_caps (visual->srcpad);
@ -425,6 +428,38 @@ gst_vis_src_negotiate (GstVisual * visual)
gst_pad_set_caps (visual->srcpad, target);
gst_caps_unref (target);
/* try to get a bufferpool now */
/* find a pool for the negotiated caps now */
query = gst_query_new_allocation (target, TRUE);
if (gst_pad_peer_query (visual->srcpad, query)) {
/* we got configuration from our peer, parse them */
gst_query_parse_allocation_params (query, &alignment, &prefix, &size,
&pool);
} else {
alignment = 0;
prefix = 0;
size = visual->outsize;
}
if (pool == NULL) {
GstStructure *config;
/* we did not get a pool, make one ourselves then */
pool = gst_buffer_pool_new ();
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_set (config, caps, size, 0, 0, prefix, 0, alignment);
gst_buffer_pool_set_config (pool, config);
}
if (visual->pool)
gst_object_unref (visual->pool);
visual->pool = pool;
/* and activate */
gst_buffer_pool_set_active (pool, TRUE);
return TRUE;
/* ERRORS */
@ -588,6 +623,8 @@ gst_visual_src_query (GstPad * pad, GstQuery * query)
static GstFlowReturn
get_buffer (GstVisual * visual, GstBuffer ** outbuf)
{
GstFlowReturn ret;
/* we don't know an output format yet, pick one */
if (GST_PAD_CAPS (visual->srcpad) == NULL) {
if (!gst_vis_src_negotiate (visual))
@ -597,7 +634,10 @@ get_buffer (GstVisual * visual, GstBuffer ** outbuf)
GST_DEBUG_OBJECT (visual, "allocating output buffer with caps %"
GST_PTR_FORMAT, GST_PAD_CAPS (visual->srcpad));
*outbuf = gst_buffer_new_and_alloc (visual->outsize);
ret = gst_buffer_pool_acquire_buffer (visual->pool, outbuf, NULL);
if (ret != GST_FLOW_OK)
return ret;
gst_buffer_set_caps (*outbuf, GST_PAD_CAPS (visual->srcpad));
return GST_FLOW_OK;
@ -853,6 +893,11 @@ gst_visual_change_state (GstElement * element, GstStateChange transition)
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
if (visual->pool) {
gst_buffer_pool_set_active (visual->pool, FALSE);
gst_object_unref (visual->pool);
visual->pool = NULL;
}
break;
case GST_STATE_CHANGE_READY_TO_NULL:
gst_visual_clear_actors (visual);