gstreamer/gst/gstbin.c

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/* Gnome-Streamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
//#define DEBUG_ENABLED
#include <gst/gst.h>
#include "config.h"
GstElementDetails gst_bin_details = {
"Generic bin",
"Bin",
"Simple container object",
VERSION,
"Erik Walthinsen <omega@cse.ogi.edu>",
"(C) 1999",
};
static void gst_bin_real_destroy (GtkObject *object);
static GstElementStateReturn gst_bin_change_state (GstElement *element);
static GstElementStateReturn gst_bin_change_state_norecurse (GstBin *bin);
static gboolean gst_bin_change_state_type (GstBin *bin,
GstElementState state,
GtkType type);
static void gst_bin_create_plan_func (GstBin *bin);
static void gst_bin_iterate_func (GstBin *bin);
static xmlNodePtr gst_bin_save_thyself (GstElement *element, xmlNodePtr parent);
static void gst_bin_restore_thyself (GstElement *element, xmlNodePtr parent,
GHashTable *elements);
/* Bin signals and args */
enum {
OBJECT_ADDED,
LAST_SIGNAL
};
enum {
ARG_0,
/* FILL ME */
};
static void gst_bin_class_init (GstBinClass *klass);
static void gst_bin_init (GstBin *bin);
static GstElementClass *parent_class = NULL;
static guint gst_bin_signals[LAST_SIGNAL] = { 0 };
GtkType
gst_bin_get_type (void)
{
static GtkType bin_type = 0;
if (!bin_type) {
static const GtkTypeInfo bin_info = {
"GstBin",
sizeof(GstBin),
sizeof(GstBinClass),
(GtkClassInitFunc)gst_bin_class_init,
(GtkObjectInitFunc)gst_bin_init,
(GtkArgSetFunc)NULL,
(GtkArgGetFunc)NULL,
(GtkClassInitFunc)NULL,
};
bin_type = gtk_type_unique (GST_TYPE_ELEMENT, &bin_info);
}
return bin_type;
}
static void
gst_bin_class_init (GstBinClass *klass)
{
GtkObjectClass *gtkobject_class;
GstElementClass *gstelement_class;
gtkobject_class = (GtkObjectClass*)klass;
gstelement_class = (GstElementClass*)klass;
parent_class = gtk_type_class (GST_TYPE_ELEMENT);
gst_bin_signals[OBJECT_ADDED] =
gtk_signal_new ("object_added", GTK_RUN_FIRST, gtkobject_class->type,
GTK_SIGNAL_OFFSET (GstBinClass, object_added),
gtk_marshal_NONE__POINTER, GTK_TYPE_NONE, 1,
GST_TYPE_ELEMENT);
gtk_object_class_add_signals (gtkobject_class, gst_bin_signals, LAST_SIGNAL);
klass->change_state_type = gst_bin_change_state_type;
klass->create_plan = gst_bin_create_plan_func;
klass->iterate = gst_bin_iterate_func;
gstelement_class->change_state = gst_bin_change_state;
gstelement_class->save_thyself = gst_bin_save_thyself;
gstelement_class->restore_thyself = gst_bin_restore_thyself;
gstelement_class->elementfactory = gst_elementfactory_find("bin");
gtkobject_class->destroy = gst_bin_real_destroy;
}
static void
gst_bin_init (GstBin *bin)
{
bin->numchildren = 0;
bin->children = NULL;
bin->use_cothreads = TRUE;
}
/**
* gst_bin_new:
* @name: name of new bin
*
* Create a new bin with given name.
*
* Returns: new bin
*/
GstElement*
gst_bin_new (gchar *name)
{
GstElement *bin = GST_ELEMENT (gtk_type_new (GST_TYPE_BIN));
gst_element_set_name (GST_ELEMENT (bin), name);
return bin;
}
/**
* gst_bin_add:
* @bin: #GstBin to add element to
* @element: #GstElement to add to bin
*
* Add the given element to the bin. Set the elements parent, and thus
* add a reference.
*/
void
gst_bin_add (GstBin *bin,
GstElement *element)
{
g_return_if_fail (bin != NULL);
g_return_if_fail (GST_IS_BIN (bin));
g_return_if_fail (element != NULL);
g_return_if_fail (GST_IS_ELEMENT (element));
// must be NULL or PAUSED state in order to modify bin
g_return_if_fail ((GST_STATE (bin) == GST_STATE_NULL) ||
(GST_STATE (bin) == GST_STATE_PAUSED));
bin->children = g_list_append (bin->children, element);
bin->numchildren++;
gst_object_set_parent (GST_OBJECT (element), GST_OBJECT (bin));
/* we know we have at least one child, we just added one... */
// if (GST_STATE(element) < GST_STATE_READY)
// gst_bin_change_state_norecurse(bin,GST_STATE_READY);
gtk_signal_emit (GTK_OBJECT (bin), gst_bin_signals[OBJECT_ADDED], element);
}
/**
* gst_bin_remove:
* @bin: #GstBin to remove element from
* @element: #GstElement to remove
*
* Remove the element from its associated bin, unparenting as well.
*/
void
gst_bin_remove (GstBin *bin,
GstElement *element)
{
g_return_if_fail (bin != NULL);
g_return_if_fail (GST_IS_BIN (bin));
g_return_if_fail (element != NULL);
g_return_if_fail (GST_IS_ELEMENT (element));
g_return_if_fail (bin->children != NULL);
// must be NULL or PAUSED state in order to modify bin
g_return_if_fail ((GST_STATE (bin) == GST_STATE_NULL) ||
(GST_STATE (bin) == GST_STATE_PAUSED));
gst_object_unparent (GST_OBJECT (element));
bin->children = g_list_remove (bin->children, element);
bin->numchildren--;
/* if we're down to zero children, force state to NULL */
if (bin->numchildren == 0)
gst_element_set_state (GST_ELEMENT (bin), GST_STATE_NULL);
}
static GstElementStateReturn
gst_bin_change_state (GstElement *element)
{
GstBin *bin;
GList *children;
GstElement *child;
g_return_val_if_fail (GST_IS_BIN (element), GST_STATE_FAILURE);
bin = GST_BIN (element);
g_print("gst_bin_change_state(\"%s\"): currently %d(%s), %d(%s) pending\n",
gst_element_get_name (element), GST_STATE (element),
_gst_print_statename (GST_STATE (element)), GST_STATE_PENDING (element),
_gst_print_statename (GST_STATE_PENDING (element)));
if (GST_STATE_PENDING (element) == GST_STATE_READY) {
GstObject *parent;
parent = gst_object_get_parent (GST_OBJECT (element));
if (!parent || !GST_IS_BIN (parent))
gst_bin_create_plan (bin);
}
// g_return_val_if_fail(bin->numchildren != 0, GST_STATE_FAILURE);
// g_print("-->\n");
children = bin->children;
while (children) {
child = GST_ELEMENT (children->data);
g_print("gst_bin_change_state: setting state on '%s'\n",
gst_element_get_name (child));
switch (gst_element_set_state (child, GST_STATE_PENDING (element))) {
case GST_STATE_FAILURE:
GST_STATE_PENDING (element) = GST_STATE_NONE_PENDING;
g_print("gstbin: child '%s' failed to go to state %d(%s)\n", gst_element_get_name (child),
GST_STATE_PENDING (element), _gst_print_statename (GST_STATE_PENDING (element)));
return GST_STATE_FAILURE;
break;
case GST_STATE_ASYNC:
g_print("gstbin: child '%s' is changing state asynchronously\n", gst_element_get_name (child));
break;
}
// g_print("\n");
children = g_list_next (children);
}
// g_print("<-- \"%s\"\n",gst_object_get_name(GST_OBJECT(bin)));
return gst_bin_change_state_norecurse (bin);
}
static GstElementStateReturn
gst_bin_change_state_norecurse (GstBin *bin)
{
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (GST_ELEMENT (bin));
else
return GST_STATE_FAILURE;
}
static gboolean
gst_bin_change_state_type(GstBin *bin,
GstElementState state,
GtkType type)
{
GList *children;
GstElement *child;
// g_print("gst_bin_change_state_type(\"%s\",%d,%d);\n",
// gst_object_get_name(GST_OBJECT(bin)),state,type);
g_return_val_if_fail (GST_IS_BIN (bin), FALSE);
g_return_val_if_fail (bin->numchildren != 0, FALSE);
// g_print("-->\n");
children = bin->children;
while (children) {
child = GST_ELEMENT (children->data);
if (GST_IS_BIN (child)) {
if (!gst_bin_set_state_type (GST_BIN (child), state,type))
return FALSE;
} else if (GTK_CHECK_TYPE (child,type)) {
if (!gst_element_set_state (child,state))
return FALSE;
}
// g_print("\n");
children = g_list_next (children);
}
if (type == GST_TYPE_BIN)
gst_element_set_state (GST_ELEMENT (bin),state);
return TRUE;
}
/**
* gst_bin_set_state_type:
* @bin: #GstBin to set the state
* @state: the new state to set the elements to
* @type: the type of elements to change
*
* Sets the state of only those objects of the given type.
*
* Returns: indication if the state change was successfull
*/
gboolean
gst_bin_set_state_type (GstBin *bin,
GstElementState state,
GtkType type)
{
GstBinClass *oclass;
DEBUG("gst_bin_set_state_type(\"%s\",%d,%d)\n",
gst_element_get_name (GST_ELEMENT (bin)), state,type);
g_return_val_if_fail (bin != NULL, FALSE);
g_return_val_if_fail (GST_IS_BIN (bin), FALSE);
oclass = GST_BIN_CLASS (GTK_OBJECT (bin)->klass);
if (oclass->change_state_type)
(oclass->change_state_type) (bin,state,type);
return TRUE;
}
static void
gst_bin_real_destroy (GtkObject *object)
{
GstBin *bin = GST_BIN (object);
GList *children;
GstElement *child;
DEBUG("in gst_bin_real_destroy()\n");
children = bin->children;
while (children) {
child = GST_ELEMENT (children->data);
gst_element_destroy (child);
children = g_list_next (children);
}
g_list_free (bin->children);
}
/**
* gst_bin_get_by_name:
* @bin: #Gstbin to search
* @name: the element name to search for
*
* get the element with the given name from this bin
*
* Returns: the element with the given name
*/
GstElement*
gst_bin_get_by_name (GstBin *bin,
gchar *name)
{
GList *children;
GstElement *child;
g_return_val_if_fail (bin != NULL, NULL);
g_return_val_if_fail (GST_IS_BIN (bin), NULL);
g_return_val_if_fail (name != NULL, NULL);
g_print("gstbin: lookup element \"%s\" in \"%s\"\n", name,
gst_element_get_name (GST_ELEMENT (bin)));
children = bin->children;
while (children) {
child = GST_ELEMENT (children->data);
if (!strcmp (child->name,name))
return child;
if (GST_IS_BIN (child)) {
GstElement *res = gst_bin_get_by_name (GST_BIN (child), name);
if (res)
return res;
}
children = g_list_next (children);
}
return NULL;
}
/**
* gst_bin_get_list:
* @bin: #Gstbin to get the list from
*
* get the list of elements in this bin
*
* Returns: a GList of elements
*/
GList*
gst_bin_get_list (GstBin *bin)
{
g_return_val_if_fail (bin != NULL, NULL);
g_return_val_if_fail (GST_IS_BIN (bin), NULL);
return bin->children;
}
static xmlNodePtr
gst_bin_save_thyself (GstElement *element,
xmlNodePtr parent)
{
GstBin *bin = GST_BIN (element);
xmlNodePtr childlist;
GList *children;
GstElement *child;
if (GST_ELEMENT_CLASS (parent_class)->save_thyself)
GST_ELEMENT_CLASS (parent_class)->save_thyself (GST_ELEMENT (bin), parent);
childlist = xmlNewChild (parent,NULL,"children",NULL);
children = bin->children;
while (children) {
child = GST_ELEMENT (children->data);
gst_element_save_thyself (child, childlist);
children = g_list_next (children);
}
return childlist;
}
static void
gst_bin_restore_thyself (GstElement *element,
xmlNodePtr parent,
GHashTable *elements)
{
GstBin *bin = GST_BIN (element);
xmlNodePtr field = parent->childs;
xmlNodePtr childlist;
g_print("gstbin: restore \"%s\"\n", gst_element_get_name (element));
while (field) {
if (!strcmp (field->name, "children")) {
childlist = field->childs;
while (childlist) {
if (!strcmp (childlist->name, "element")) {
GstElement *element = gst_element_load_thyself (childlist, elements);
gst_bin_add (bin, element);
}
childlist = childlist->next;
}
}
field = field->next;
}
}
void
gst_bin_use_cothreads (GstBin *bin,
gboolean enabled)
{
g_return_if_fail (GST_IS_BIN (bin));
bin->use_cothreads = enabled;
}
/**
* gst_bin_iterate:
* @bin: #Gstbin to iterate
*
* iterates over the elements in this bin
*/
void
gst_bin_iterate (GstBin *bin)
{
GstBinClass *oclass;
oclass = GST_BIN_CLASS (GTK_OBJECT (bin)->klass);
DEBUG("gst_bin_iterate()\n");
if (oclass->iterate)
(oclass->iterate) (bin);
}
/**
* gst_bin_create_plan:
* @bin: #Gstbin to create the plan for
*
* let the bin figure out how to handle the plugins in it.
*/
void
gst_bin_create_plan (GstBin *bin)
{
GstBinClass *oclass;
oclass = GST_BIN_CLASS (GTK_OBJECT (bin)->klass);
if (oclass->create_plan)
(oclass->create_plan) (bin);
}
typedef struct {
gulong offset;
gulong size;
} region_struct;
static int
gst_bin_loopfunc_wrapper (int argc,char *argv[])
{
GstElement *element = GST_ELEMENT (argv);
GList *pads;
GstPad *pad;
GstBuffer *buf;
G_GNUC_UNUSED const gchar *name = gst_element_get_name (element);
DEBUG("** gst_bin_loopfunc_wrapper(%d,\"%s\")\n",
argc,gst_element_get_name (element));
if (element->loopfunc != NULL) {
while (1) {
DEBUG("** gst_bin_loopfunc_wrapper(): element %s has loop function, calling it\n", name);
(element->loopfunc) (element);
DEBUG("** gst_bin_loopfunc_wrapper(): element %s ended loop function\n", name);
}
} else {
DEBUG("** gst_bin_loopfunc_wrapper(): element %s is chain-based, calling in infinite loop\n", name);
if (GST_IS_SRC (element)) {
region_struct *region = cothread_get_data (element->threadstate, "region");
if (region) {
gst_src_push_region (GST_SRC (element), region->offset, region->size);
}
else {
DEBUG("** gst_bin_loopfunc_wrapper(): calling push function of source %s\n", name);
gst_src_push (GST_SRC (element));
DEBUG("** gst_bin_loopfunc_wrapper(): calling push function of source %s done\n", name);
}
} else if (GST_IS_CONNECTION (element) && argc == 1) {
while (1) {
DEBUG("** gst_bin_loopfunc_wrapper(): calling push function of connection %s\n", name);
gst_connection_push (GST_CONNECTION (element));
DEBUG("** gst_bin_loopfunc_wrapper(): calling push function of connection %s done\n", name);
}
} else {
while (1) {
pads = element->pads;
while (pads) {
pad = GST_PAD (pads->data);
if (pad->direction == GST_PAD_SINK) {
DEBUG("** gst_bin_loopfunc_wrapper(): pulling a buffer from %s:%s\n", name, gst_pad_get_name (pad));
buf = gst_pad_pull (pad);
DEBUG("** gst_bin_loopfunc_wrapper(): calling chain function of %s:%s\n", name, gst_pad_get_name (pad));
(pad->chainfunc) (pad,buf);
DEBUG("** gst_bin_loopfunc_wrapper(): calling chain function of %s:%s done\n", name, gst_pad_get_name (pad));
}
pads = g_list_next (pads);
}
}
}
}
return 0;
}
static void
gst_bin_pullfunc_wrapper (GstPad *pad)
{
DEBUG("** in gst_bin_pullfunc_wrapper()============================= %s\n",
gst_element_get_name (GST_ELEMENT (pad->parent)));
cothread_switch (GST_ELEMENT (pad->parent)->threadstate);
DEBUG("** out gst_bin_pullfunc_wrapper()============================= %s\n",
gst_element_get_name (GST_ELEMENT (pad->parent)));
}
static void
gst_bin_pullregionfunc_wrapper (GstPad *pad,
gulong offset,
gulong size)
{
region_struct region;
region.offset = offset;
region.size = size;
DEBUG("** in gst_bin_pullregionfunc_wrapper()============================= %s\n",
gst_element_get_name (GST_ELEMENT (pad->parent)));
cothread_set_data (GST_ELEMENT (pad->parent)->threadstate, "region", &region);
cothread_switch (GST_ELEMENT (pad->parent)->threadstate);
cothread_set_data (GST_ELEMENT (pad->parent)->threadstate, "region", NULL);
DEBUG("** out gst_bin_pullregionfunc_wrapper()============================= %s\n",
gst_element_get_name (GST_ELEMENT (pad->parent)));
}
static void
gst_bin_pushfunc_wrapper (GstPad *pad)
{
DEBUG("** in gst_bin_pushfunc_wrapper()============================= %s\n",
gst_element_get_name (GST_ELEMENT (pad->parent)));
cothread_switch (GST_ELEMENT (pad->parent)->threadstate);
DEBUG("** out gst_bin_pushfunc_wrapper()============================= %s\n",
gst_element_get_name (GST_ELEMENT (pad->parent)));
}
static void
gst_bin_create_plan_func (GstBin *bin)
{
GList *elements;
GstElement *element;
int sink_pads;
GList *pads;
GstPad *pad, *opad, *peer;
GstElement *outside;
g_print("gstbin: creating plan for bin \"%s\"\n", gst_element_get_name (GST_ELEMENT (bin)));
// first loop through all children to see if we need cothreads
// we break immediately when we find we need to, why keep searching?
elements = bin->children;
while (elements) {
element = GST_ELEMENT (elements->data);
g_print("gstbin: found element \"%s\" in bin \"%s\"\n",
gst_element_get_name (element),
gst_element_get_name (GST_ELEMENT (bin)));
// if it's a loop-based element, use cothreads
if (element->loopfunc != NULL) {
g_print("gstbin: loop based element \"%s\" in bin \"%s\"\n",
gst_element_get_name (element),
gst_element_get_name (GST_ELEMENT (bin)));
bin->need_cothreads = TRUE;
break;
}
// if it's a complex element, use cothreads
else if (GST_ELEMENT_IS_MULTI_IN (element)) {
g_print("gstbin: complex element \"%s\" in bin \"%s\"\n",
gst_element_get_name (element),
gst_element_get_name (GST_ELEMENT (bin)));
bin->need_cothreads = TRUE;
break;
}
// if it has more than one input pad, use cothreads
sink_pads = 0;
pads = gst_element_get_pad_list (element);
while (pads) {
pad = GST_PAD (pads->data);
if (pad->direction == GST_PAD_SINK)
sink_pads++;
pads = g_list_next (pads);
}
if (sink_pads > 1) {
g_print("gstbin: more than 1 sinkpad for element \"%s\" in bin \"%s\"\n",
gst_element_get_name (element),
gst_element_get_name (GST_ELEMENT (bin)));
bin->need_cothreads = TRUE;
break;
}
elements = g_list_next (elements);
}
// FIXME
bin->need_cothreads &= bin->use_cothreads;
// clear previous plan state
g_list_free (bin->entries);
bin->entries = NULL;
bin->numentries = 0;
if (bin->need_cothreads) {
g_print("gstbin: need cothreads\n");
// first create thread context
if (bin->threadcontext == NULL) {
bin->threadcontext = cothread_init ();
g_print("gstbin: initialized cothread context\n");
}
// walk through all the children
elements = bin->children;
while (elements) {
element = GST_ELEMENT (elements->data);
// start by creating thread state for the element
if (element->threadstate == NULL) {
element->threadstate = cothread_create (bin->threadcontext);
cothread_setfunc (element->threadstate, gst_bin_loopfunc_wrapper,
0, (char **)element);
}
if (GST_IS_BIN (element)) {
gst_bin_create_plan (GST_BIN (element));
}
if (GST_IS_SRC (element)) {
g_print("gstbin: adding '%s' as entry point\n",gst_element_get_name (element));
bin->entries = g_list_prepend (bin->entries,element);
bin->numentries++;
}
pads = gst_element_get_pad_list (element);
while (pads) {
pad = GST_PAD(pads->data);
g_print("gstbin: setting push&pull handlers for %s:%s\n",
gst_element_get_name (element), gst_pad_get_name (pad));
// an internal connection will push outside this bin.
if (!GST_IS_CONNECTION (element)) {
pad->pushfunc = gst_bin_pushfunc_wrapper;
}
pad->pullfunc = gst_bin_pullfunc_wrapper;
pad->pullregionfunc = gst_bin_pullregionfunc_wrapper;
/* we only worry about sink pads */
if (gst_pad_get_direction (pad) == GST_PAD_SINK) {
/* get the pad's peer */
peer = gst_pad_get_peer (pad);
if (!peer) break;
/* get the parent of the peer of the pad */
outside = GST_ELEMENT (gst_pad_get_parent (peer));
if (!outside) break;
/* if it's a connection and it's not ours... */
if (GST_IS_CONNECTION (outside) &&
(gst_object_get_parent (GST_OBJECT (outside)) != GST_OBJECT (bin))) {
GList *connection_pads = gst_element_get_pad_list (outside);
while (connection_pads) {
opad = GST_PAD (connection_pads->data);
if (gst_pad_get_direction (opad) == GST_PAD_SRC) {
g_print("gstbin: setting push&pull handlers for %s:%s SRC connection %p %p\n",
gst_element_get_name (outside),gst_pad_get_name (opad), opad, opad->pullfunc);
opad->pushfunc = gst_bin_pushfunc_wrapper;
opad->pullfunc = gst_bin_pullfunc_wrapper;
opad->pullregionfunc = gst_bin_pullregionfunc_wrapper;
if (outside->threadstate == NULL) {
outside->threadstate = cothread_create (bin->threadcontext);
cothread_setfunc (outside->threadstate, gst_bin_loopfunc_wrapper,
1, (char **)outside);
}
}
connection_pads = g_list_next (connection_pads);
}
gst_info("gstbin: element \"%s\" is the external source Connection "
"for internal element \"%s\"\n",
gst_element_get_name (GST_ELEMENT (outside)),
gst_element_get_name (GST_ELEMENT (element)));
bin->entries = g_list_prepend (bin->entries,outside);
bin->numentries++;
}
}
pads = g_list_next (pads);
}
elements = g_list_next (elements);
}
} else {
g_print("gstbin: don't need cothreads, looking for entry points\n");
// we have to find which elements will drive an iteration
elements = bin->children;
while (elements) {
element = GST_ELEMENT (elements->data);
g_print("gstbin: found element \"%s\"\n", gst_element_get_name (element));
if (GST_IS_BIN (element)) {
gst_bin_create_plan (GST_BIN (element));
}
if (GST_IS_SRC (element)) {
g_print("gstbin: adding '%s' as entry point\n",gst_element_get_name (element));
bin->entries = g_list_prepend (bin->entries, element);
bin->numentries++;
} else {
/* go through the list of pads to see if there's a Connection */
pads = gst_element_get_pad_list (element);
while (pads) {
pad = GST_PAD (pads->data);
/* we only worry about sink pads */
if (gst_pad_get_direction (pad) == GST_PAD_SINK) {
g_print("gstbin: found SINK pad %s\n", gst_pad_get_name (pad));
/* get the pad's peer */
peer = gst_pad_get_peer (pad);
if (!peer) {
g_print("gstbin: found SINK pad %s has no peer\n", gst_pad_get_name (pad));
break;
}
/* get the parent of the peer of the pad */
outside = GST_ELEMENT (gst_pad_get_parent (peer));
if (!outside) break;
/* if it's a connection and it's not ours... */
if (GST_IS_CONNECTION (outside) &&
(gst_object_get_parent (GST_OBJECT (outside)) != GST_OBJECT (bin))) {
gst_info("gstbin: element \"%s\" is the external source Connection "
"for internal element \"%s\"\n",
gst_element_get_name (GST_ELEMENT (outside)),
gst_element_get_name (GST_ELEMENT (element)));
bin->entries = g_list_prepend (bin->entries, outside);
bin->numentries++;
}
}
else {
g_print("gstbin: found pad %s\n", gst_pad_get_name (pad));
}
pads = g_list_next (pads);
}
}
elements = g_list_next (elements);
}
}
}
void
gst_bin_iterate_func (GstBin *bin)
{
GList *entries;
GstElement *entry;
DEBUG("gst_bin_iterate_func() in \"%s\"\n", gst_element_get_name (GST_ELEMENT (bin)));
g_return_if_fail (bin != NULL);
g_return_if_fail (GST_IS_BIN (bin));
g_return_if_fail (GST_STATE (bin) == GST_STATE_PLAYING);
DEBUG("GstBin: iterating\n");
if (bin->need_cothreads) {
// all we really have to do is switch to the first child
// FIXME this should be lots more intelligent about where to start
DEBUG("** in gst_bin_iterate_func()==================================%s\n",
gst_element_get_name (GST_ELEMENT (bin->children->data)));
cothread_switch (GST_ELEMENT (bin->children->data)->threadstate);
DEBUG("** out gst_bin_iterate_func()==================================%s\n",
gst_element_get_name (GST_ELEMENT (bin->children->data)));
} else {
if (bin->numentries <= 0) {
//printf("gstbin: no entries in bin \"%s\" trying children...\n", gst_element_get_name(GST_ELEMENT(bin)));
// we will try loop over the elements then...
entries = bin->children;
}
else {
entries = bin->entries;
}
g_assert(entries != NULL);
while (entries) {
entry = GST_ELEMENT (entries->data);
if (GST_IS_SRC (entry))
gst_src_push (GST_SRC (entry));
else if (GST_IS_CONNECTION (entry))
gst_connection_push (GST_CONNECTION (entry));
else if (GST_IS_BIN (entry))
gst_bin_iterate (GST_BIN (entry));
else
g_assert_not_reached ();
entries = g_list_next (entries);
}
}
}