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rsnaudiodec: Use ghost pads and always forward application/x-gst-dvd events immediately

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Fixes bug #582779.
This commit is contained in:
Sebastian Dröge 2009-09-26 17:21:35 +02:00
parent e6165520b9
commit bf1b64fab0
2 changed files with 57 additions and 258 deletions
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303
ext/resindvd/rsnaudiodec.c
View file

@ -75,20 +75,9 @@ static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
G_DEFINE_TYPE (RsnAudioDec, rsn_audiodec, GST_TYPE_BIN); G_DEFINE_TYPE (RsnAudioDec, rsn_audiodec, GST_TYPE_BIN);
static gboolean rsn_audiodec_set_sink_caps (GstPad * pad, GstCaps * caps);
static GstCaps *rsn_audiodec_get_sink_caps (GstPad * pad);
static GstFlowReturn rsn_audiodec_chain (GstPad * pad, GstBuffer * buf);
static gboolean rsn_audiodec_sink_event (GstPad * pad, GstEvent * event);
static GstStateChangeReturn rsn_audiodec_change_state (GstElement * element, static GstStateChangeReturn rsn_audiodec_change_state (GstElement * element,
GstStateChange transition); GstStateChange transition);
static GstCaps *rsn_audiodec_get_proxy_sink_caps (GstPad * pad);
static GstCaps *rsn_audiodec_get_proxy_src_caps (GstPad * pad);
static GstFlowReturn rsn_audiodec_proxy_src_chain (GstPad * pad,
GstBuffer * buf);
static gboolean rsn_audiodec_proxy_src_event (GstPad * pad, GstEvent * event);
static void rsn_audiodec_dispose (GObject * gobj); static void rsn_audiodec_dispose (GObject * gobj);
static void cleanup_child (RsnAudioDec * self); static void cleanup_child (RsnAudioDec * self);
@ -122,22 +111,44 @@ rsn_audiodec_class_init (RsnAudioDecClass * klass)
gst_element_class_set_details (element_class, &element_details); gst_element_class_set_details (element_class, &element_details);
} }
static gboolean
rsn_audiodec_sink_event (GstPad * pad, GstEvent * event)
{
RsnAudioDec *self = RSN_AUDIODEC (gst_pad_get_parent (pad));
gboolean ret = TRUE;
const GstStructure *s = gst_event_get_structure (event);
const gchar *name = (s ? gst_structure_get_name (s) : NULL);
if (name && g_str_equal (name, "application/x-gst-dvd"))
ret = gst_pad_push_event (GST_PAD_CAST (self->srcpad), event);
else
ret = self->sink_event_func (pad, event);
gst_object_unref (self);
return ret;
}
static void static void
rsn_audiodec_init (RsnAudioDec * self) rsn_audiodec_init (RsnAudioDec * self)
{ {
self->sinkpad = gst_pad_new_from_static_template (&sink_template, "sink"); GstPadTemplate *templ;
gst_pad_set_setcaps_function (self->sinkpad,
GST_DEBUG_FUNCPTR (rsn_audiodec_set_sink_caps));
gst_pad_set_getcaps_function (self->sinkpad,
GST_DEBUG_FUNCPTR (rsn_audiodec_get_sink_caps));
gst_pad_set_chain_function (self->sinkpad,
GST_DEBUG_FUNCPTR (rsn_audiodec_chain));
gst_pad_set_event_function (self->sinkpad,
GST_DEBUG_FUNCPTR (rsn_audiodec_sink_event));
gst_element_add_pad (GST_ELEMENT (self), self->sinkpad);
self->srcpad = gst_pad_new_from_static_template (&src_template, "src"); templ = gst_static_pad_template_get (&sink_template);
gst_element_add_pad (GST_ELEMENT (self), self->srcpad); self->sinkpad =
GST_GHOST_PAD_CAST (gst_ghost_pad_new_no_target_from_template ("sink",
templ));
gst_object_unref (templ);
self->sink_event_func = GST_PAD_EVENTFUNC (self->sinkpad);
gst_pad_set_event_function (GST_PAD_CAST (self->sinkpad),
GST_DEBUG_FUNCPTR (rsn_audiodec_sink_event));
templ = gst_static_pad_template_get (&src_template);
self->srcpad =
GST_GHOST_PAD_CAST (gst_ghost_pad_new_no_target_from_template ("src",
templ));
gst_object_unref (templ);
gst_element_add_pad (GST_ELEMENT (self), GST_PAD_CAST (self->sinkpad));
gst_element_add_pad (GST_ELEMENT (self), GST_PAD_CAST (self->srcpad));
} }
static void static void
@ -149,228 +160,41 @@ rsn_audiodec_dispose (GObject * object)
G_OBJECT_CLASS (rsn_audiodec_parent_class)->dispose (object); G_OBJECT_CLASS (rsn_audiodec_parent_class)->dispose (object);
} }
static gboolean
rsn_audiodec_set_sink_caps (GstPad * pad, GstCaps * caps)
{
RsnAudioDec *self = (RsnAudioDec *) gst_pad_get_parent (pad);
gboolean res;
if (self == NULL)
goto error;
res = gst_pad_set_caps (self->child_sink, caps);
gst_object_unref (self);
return res;
error:
if (self)
gst_object_unref (self);
return FALSE;
}
static GstCaps *
rsn_audiodec_get_sink_caps (GstPad * sinkpad)
{
RsnAudioDec *self = (RsnAudioDec *) gst_pad_get_parent (sinkpad);
GstCaps *res;
if (self == NULL || self->child_sink == NULL)
goto error;
/* FIXME: Can't get the caps of the child as this
* will deadlock! */
res = gst_caps_copy (decoder_caps);
GST_INFO_OBJECT (self, "Returning caps %" GST_PTR_FORMAT, res);
gst_object_unref (self);
return res;
error:
if (self)
gst_object_unref (self);
return gst_caps_copy (gst_pad_get_pad_template_caps (sinkpad));
}
static GstFlowReturn
rsn_audiodec_chain (GstPad * pad, GstBuffer * buf)
{
RsnAudioDec *self = (RsnAudioDec *) gst_pad_get_parent (pad);
GstFlowReturn res;
if (self == NULL)
goto error;
GST_INFO_OBJECT (self, "Pushing buffer %" GST_PTR_FORMAT " into decoder",
buf);
res = gst_pad_chain (self->child_sink, buf);
gst_object_unref (self);
return res;
error:
if (self)
gst_object_unref (self);
return GST_FLOW_ERROR;
}
static gboolean
rsn_audiodec_sink_event (GstPad * pad, GstEvent * event)
{
RsnAudioDec *self = RSN_AUDIODEC (gst_pad_get_parent (pad));
gboolean res;
if (self == NULL)
goto error;
GST_INFO_OBJECT (self, "Sending event %" GST_PTR_FORMAT " into decoder",
event);
res = gst_pad_send_event (self->child_sink, event);
gst_object_unref (self);
return res;
error:
if (self)
gst_object_unref (self);
return FALSE;
}
static GstCaps *
rsn_audiodec_get_proxy_sink_caps (GstPad * pad)
{
GstPad *sinkpad = GST_PAD (gst_pad_get_parent (pad));
GstCaps *ret;
if (sinkpad != NULL) {
ret = gst_pad_get_caps (sinkpad);
} else
ret = gst_caps_new_any ();
gst_object_unref (sinkpad);
return ret;
}
static GstCaps *
rsn_audiodec_get_proxy_src_caps (GstPad * pad)
{
GstPad *srcpad = GST_PAD (gst_pad_get_parent (pad));
GstCaps *ret;
if (srcpad != NULL) {
ret = gst_pad_get_caps (srcpad);
} else
ret = gst_caps_new_any ();
gst_object_unref (srcpad);
return ret;
}
static GstFlowReturn
rsn_audiodec_proxy_src_chain (GstPad * pad, GstBuffer * buf)
{
GstPad *srcpad = GST_PAD (gst_pad_get_parent (pad));
RsnAudioDec *self = (RsnAudioDec *) gst_pad_get_parent (srcpad);
GstFlowReturn ret;
gst_object_unref (srcpad);
if (self == NULL)
return GST_FLOW_ERROR;
GST_DEBUG_OBJECT (self, "Data from decoder, pushing to pad %"
GST_PTR_FORMAT, self->srcpad);
ret = gst_pad_push (self->srcpad, buf);
gst_object_unref (self);
return ret;
}
static gboolean
rsn_audiodec_proxy_src_event (GstPad * pad, GstEvent * event)
{
GstPad *srcpad = GST_PAD (gst_pad_get_parent (pad));
RsnAudioDec *self = (RsnAudioDec *) gst_pad_get_parent (srcpad);
gboolean ret;
gst_object_unref (srcpad);
if (self == NULL)
return FALSE;
ret = gst_pad_push_event (self->srcpad, event);
gst_object_unref (self);
return ret;
}
static void
create_proxy_pads (RsnAudioDec * self)
{
if (self->child_sink_proxy == NULL) {
/* A src pad the child can query/send events to */
self->child_sink_proxy = gst_pad_new ("sink_proxy", GST_PAD_SRC);
gst_object_set_parent ((GstObject *) self->child_sink_proxy,
(GstObject *) self->sinkpad);
gst_pad_set_getcaps_function (self->child_sink_proxy,
GST_DEBUG_FUNCPTR (rsn_audiodec_get_proxy_sink_caps));
}
if (self->child_src_proxy == NULL) {
/* A sink pad the child can push to */
self->child_src_proxy = gst_pad_new ("src_proxy", GST_PAD_SINK);
gst_object_set_parent ((GstObject *) self->child_src_proxy,
(GstObject *) self->srcpad);
gst_pad_set_getcaps_function (self->child_src_proxy,
GST_DEBUG_FUNCPTR (rsn_audiodec_get_proxy_src_caps));
gst_pad_set_chain_function (self->child_src_proxy,
GST_DEBUG_FUNCPTR (rsn_audiodec_proxy_src_chain));
gst_pad_set_event_function (self->child_src_proxy,
GST_DEBUG_FUNCPTR (rsn_audiodec_proxy_src_event));
}
}
static gboolean static gboolean
rsn_audiodec_set_child (RsnAudioDec * self, GstElement * new_child) rsn_audiodec_set_child (RsnAudioDec * self, GstElement * new_child)
{ {
GstPad *child_pad;
if (self->current_decoder) { if (self->current_decoder) {
gst_ghost_pad_set_target (self->srcpad, NULL);
gst_ghost_pad_set_target (self->sinkpad, NULL);
gst_bin_remove ((GstBin *) self, self->current_decoder); gst_bin_remove ((GstBin *) self, self->current_decoder);
self->current_decoder = NULL; self->current_decoder = NULL;
} }
if (self->child_sink) {
(void) gst_pad_unlink (self->child_sink_proxy, self->child_sink);
gst_object_unref (self->child_sink);
self->child_sink = NULL;
}
if (self->child_src) {
(void) gst_pad_unlink (self->child_src, self->child_src_proxy);
gst_object_unref (self->child_src);
self->child_src = NULL;
}
if (new_child == NULL) if (new_child == NULL)
return TRUE; return TRUE;
self->child_sink = gst_element_get_static_pad (new_child, "sink"); if (!gst_bin_add ((GstBin *) self, new_child))
if (self->child_sink == NULL) { return FALSE;
child_pad = gst_element_get_static_pad (new_child, "sink");
if (child_pad == NULL) {
return FALSE; return FALSE;
} }
self->child_src = gst_element_get_static_pad (new_child, "src"); gst_ghost_pad_set_target (self->sinkpad, child_pad);
if (self->child_src == NULL) { gst_object_unref (child_pad);
return FALSE;
} child_pad = gst_element_get_static_pad (new_child, "src");
if (!gst_bin_add ((GstBin *) self, new_child)) { if (child_pad == NULL) {
return FALSE; return FALSE;
} }
gst_ghost_pad_set_target (self->srcpad, child_pad);
gst_object_unref (child_pad);
GST_DEBUG_OBJECT (self, "Add child %" GST_PTR_FORMAT, new_child); GST_DEBUG_OBJECT (self, "Add child %" GST_PTR_FORMAT, new_child);
self->current_decoder = new_child; self->current_decoder = new_child;
if (gst_pad_link (self->child_sink_proxy,
self->child_sink) != GST_PAD_LINK_OK) gst_element_sync_state_with_parent (new_child);
return FALSE;
GST_DEBUG_OBJECT (self, "linked proxy sink pad %" GST_PTR_FORMAT
" to child sink %" GST_PTR_FORMAT, self->child_sink_proxy,
self->child_sink);
if (gst_pad_link (self->child_src, self->child_src_proxy) != GST_PAD_LINK_OK)
return FALSE;
GST_DEBUG_OBJECT (self, "linked child src pad %" GST_PTR_FORMAT
" to proxy pad %" GST_PTR_FORMAT, self->child_src, self->child_src_proxy);
return TRUE; return TRUE;
} }
@ -380,15 +204,6 @@ cleanup_child (RsnAudioDec * self)
{ {
GST_DEBUG_OBJECT (self, "Removing child element"); GST_DEBUG_OBJECT (self, "Removing child element");
(void) rsn_audiodec_set_child (self, NULL); (void) rsn_audiodec_set_child (self, NULL);
GST_DEBUG_OBJECT (self, "Destroying proxy pads");
if (self->child_sink_proxy != NULL) {
gst_object_unparent ((GstObject *) self->child_sink_proxy);
self->child_sink_proxy = NULL;
}
if (self->child_src_proxy != NULL) {
gst_object_unparent ((GstObject *) self->child_src_proxy);
self->child_src_proxy = NULL;
}
} }
static gboolean static gboolean
@ -500,15 +315,13 @@ _get_decoder_factories (gpointer arg)
static GstStateChangeReturn static GstStateChangeReturn
rsn_audiodec_change_state (GstElement * element, GstStateChange transition) rsn_audiodec_change_state (GstElement * element, GstStateChange transition)
{ {
GstStateChangeReturn ret; GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
RsnAudioDec *self = RSN_AUDIODEC (element); RsnAudioDec *self = RSN_AUDIODEC (element);
static GOnce gonce = G_ONCE_INIT; static GOnce gonce = G_ONCE_INIT;
switch (transition) { switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:{ case GST_STATE_CHANGE_NULL_TO_READY:{
GstElement *new_child; GstElement *new_child;
create_proxy_pads (self);
GST_DEBUG_OBJECT (self, "Created proxy pads");
new_child = gst_element_factory_make ("autoconvert", NULL); new_child = gst_element_factory_make ("autoconvert", NULL);
g_once (&gonce, _get_decoder_factories, NULL); g_once (&gonce, _get_decoder_factories, NULL);
g_object_set (G_OBJECT (new_child), "factories", decoder_factories, NULL); g_object_set (G_OBJECT (new_child), "factories", decoder_factories, NULL);
@ -517,16 +330,13 @@ rsn_audiodec_change_state (GstElement * element, GstStateChange transition)
break; break;
} }
case GST_STATE_CHANGE_READY_TO_PAUSED: case GST_STATE_CHANGE_READY_TO_PAUSED:
GST_DEBUG_OBJECT (self, "Activating proxy pads");
if (self->child_sink_proxy)
gst_pad_set_active (self->child_sink_proxy, TRUE);
if (self->child_src_proxy)
gst_pad_set_active (self->child_src_proxy, TRUE);
break; break;
default: default:
break; break;
} }
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
ret = ret =
GST_ELEMENT_CLASS (rsn_audiodec_parent_class)->change_state (element, GST_ELEMENT_CLASS (rsn_audiodec_parent_class)->change_state (element,
transition); transition);
@ -535,11 +345,6 @@ rsn_audiodec_change_state (GstElement * element, GstStateChange transition)
switch (transition) { switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY: case GST_STATE_CHANGE_PAUSED_TO_READY:
GST_DEBUG_OBJECT (self, "Deactivating proxy pads");
if (self->child_sink_proxy)
gst_pad_set_active (self->child_sink_proxy, FALSE);
if (self->child_src_proxy)
gst_pad_set_active (self->child_src_proxy, FALSE);
break; break;
case GST_STATE_CHANGE_READY_TO_NULL: case GST_STATE_CHANGE_READY_TO_NULL:
cleanup_child (self); cleanup_child (self);

12
ext/resindvd/rsnaudiodec.h
View file

@ -39,18 +39,12 @@ struct _RsnAudioDec {
GstBin element; GstBin element;
/* Our sink and source pads */ /* Our sink and source pads */
GstPad *sinkpad; GstGhostPad *sinkpad;
GstPad *srcpad; GstGhostPad *srcpad;
/* Proxy pads that are linked to the child sink pad GstPadEventFunction sink_event_func;
* and source pad respectively */
GstPad *child_sink_proxy;
GstPad *child_src_proxy;
GstElement *current_decoder; GstElement *current_decoder;
/* Current child's sink and source pads */
GstPad *child_sink;
GstPad *child_src;
}; };
struct _RsnAudioDecClass { struct _RsnAudioDecClass {