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gstreamer/gst/gstbin.c
Erik Walthinsen 6ba0668cd8 Snapshot of work-in-progress do deal with out-of-bin elements. Current system is very likely going to be ditched due... 
Original commit message from CVS:
Snapshot of work-in-progress do deal with out-of-bin elements.  Current
system is very likely going to be ditched due to its complexity and the
fact that it doesn't work right now.  More than that, it's generating some
really odd results in my test program, which aren't readily explainable.

If you want to keep a working copy of your working copy (heh), don't update
until this is replaced with a hybrid approach.  This approach will be the
beginning of a plan generator that can construct full hybrid schedules
given hints from various places.

Hybrid means that cothreads are used, but there are chunks of the pipeline
that are actually dealt with by chaining. This can improve speed by
reducing cothread switches (which are much cheaper than thread switches,
but still far from free, about 570 cycles on my PIII), but does carry a
complexity burden.  Luckily, the structure of GStreamer allows that burden
to live entirely in create_plan.  Luck?  I think not ;-)
2000-12-09 09:13:09 +00:00

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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 GST_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;
// FIXME temporary testing measure
// 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)));
// 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)));
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);
}
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;
DEBUG_ENTER("(\"%s\")",gst_element_get_name(GST_ELEMENT(bin)));
oclass = GST_BIN_CLASS (GTK_OBJECT (bin)->klass);
if (oclass->iterate)
(oclass->iterate) (bin);
DEBUG_LEAVE("(\"%s\")",gst_element_get_name(GST_ELEMENT(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_ENTER("(%d,'%s')",argc,name);
// DEBUG("entering gst_bin_loopfunc_wrapper(%d,\"%s\")\n",
// argc,gst_element_get_name (element));
if (element->loopfunc != NULL) {
DEBUG("element %s has loop function, calling it\n", name);
(element->loopfunc) (element);
DEBUG("element %s ended loop function\n", name);
} else {
DEBUG("element %s is chain-based\n", name);
DEBUG("stepping through pads\n");
do {
pads = element->pads;
while (pads) {
pad = GST_PAD (pads->data);
if (pad->direction == GST_PAD_SINK) {
DEBUG("pulling a buffer from %s:%s\n", name, gst_pad_get_name (pad));
buf = gst_pad_pull (pad);
DEBUG("calling chain function of %s:%s\n", name, gst_pad_get_name (pad));
(pad->chainfunc) (pad,buf);
DEBUG("calling chain function of %s:%s done\n", name, gst_pad_get_name (pad));
}
pads = g_list_next (pads);
}
} while (!GST_ELEMENT_IS_COTHREAD_STOPPING(element));
}
GST_FLAG_UNSET(element,GST_ELEMENT_COTHREAD_STOPPING);
DEBUG_LEAVE("(%d,'%s')",argc,name);
return 0;
}
static int
gst_bin_src_wrapper (int argc,char *argv[])
{
GstElement *element = GST_ELEMENT (argv);
GList *pads;
GstPad *pad;
G_GNUC_UNUSED const gchar *name = gst_element_get_name (element);
DEBUG_ENTER("(%d,\"%s\")",argc,name);
do {
pads = element->pads;
while (pads) {
pad = GST_PAD (pads->data);
if (pad->direction == GST_PAD_SRC) {
region_struct *region = cothread_get_data (pad->threadstate, "region");
if (region) {
//gst_src_push_region (GST_SRC (element), region->offset, region->size);
if (pad->pullregionfunc == NULL)
fprintf(stderr,"error, no pullregionfunc in \"%s\"\n", name);
(pad->pullregionfunc)(pad, region->offset, region->size);
}
else {
if (pad->pullfunc == NULL)
fprintf(stderr,"error, no pullfunc in \"%s\"\n", name);
(pad->pullfunc)(pad);
}
}
pads = g_list_next(pads);
}
} while (!GST_ELEMENT_IS_COTHREAD_STOPPING(element));
GST_FLAG_UNSET(element,GST_ELEMENT_COTHREAD_STOPPING);
DEBUG_LEAVE("");
return 0;
}
static int
gst_bin_connection_wrapper (int argc,char *argv[])
{
GstElement *element = GST_ELEMENT (argv);
GList *pads;
GstPad *pad;
G_GNUC_UNUSED const gchar *name = gst_element_get_name (element);
DEBUG_ENTER("(%d,\"%s\")",argc,name);
do {
DEBUG("Connection checking pads\n");
pads = element->pads;
while (pads) {
pad = GST_PAD (pads->data);
if (pad->direction == GST_PAD_SRC) {
DEBUG("pullfunc for %s:%s(%p) at %p is set to %p\n",GST_DEBUG_PAD_NAME(pad),pad,&pad->pullfunc,pad->pullfunc);
if (pad->pullfunc == NULL) fprintf(stderr,"error, no pullfunc in \"%s\"\n", name);
(pad->pullfunc)(pad);
}
pads = g_list_next(pads);
}
DEBUG("Connection done checking pads, checking COTHREAD_STOPPING on \"%s\"(%p)\n",
gst_element_get_name(element),element);
} while (!GST_ELEMENT_IS_COTHREAD_STOPPING(element));
GST_FLAG_UNSET(element,GST_ELEMENT_COTHREAD_STOPPING);
DEBUG_LEAVE("");
return 0;
}
static int
gst_bin_sched_wrapper (int argc, char *argv[])
{
_GstBinOutsideSchedule *sched = (_GstBinOutsideSchedule *)argv;
GstElement *element = sched->element;
GSList *pads;
GstPad *pad;
region_struct *region;
G_GNUC_UNUSED const gchar *name = gst_element_get_name (element);
DEBUG_ENTER("(\"%s\")",name);
do {
pads = sched->padlist;
while (pads) {
pad = GST_PAD (pads->data);
region = cothread_get_data (pad->threadstate, "region");
if (region) {
//gst_src_push_region (GST_SRC (element), region->offset, region->size);
if (pad->pullregionfunc == NULL)
fprintf(stderr,"error, no pullregionfunc in \"%s\"\n", name);
(pad->pullregionfunc)(pad, region->offset, region->size);
}
else {
if (pad->pullfunc == NULL)
fprintf(stderr,"error, no pullfunc in \"%s\"\n", name);
(pad->pullfunc)(pad);
}
}
} while (!(sched->flags && GST_ELEMENT_COTHREAD_STOPPING));
sched->flags &= ~GST_ELEMENT_COTHREAD_STOPPING;
DEBUG_LEAVE("");
return 0;
}
static void
gst_bin_pullfunc_proxy (GstPad *pad)
{
DEBUG_ENTER("(%s:%s)",GST_DEBUG_PAD_NAME(pad));
cothread_switch (pad->threadstate);
}
static void
gst_bin_pullregionfunc_proxy (GstPad *pad,
gulong offset,
gulong size)
{
region_struct region;
DEBUG_ENTER("%s:%s,%ld,%ld",GST_DEBUG_PAD_NAME(pad),offset,size);
region.offset = offset;
region.size = size;
cothread_set_data (pad->threadstate, "region", &region);
cothread_switch (pad->threadstate);
cothread_set_data (pad->threadstate, "region", NULL);
}
static void
gst_bin_pushfunc_proxy (GstPad *pad)
{
DEBUG_ENTER("(%s:%s)",GST_DEBUG_PAD_NAME(pad));
cothread_switch (pad->threadstate);
}
/* Creates the plan for a src or connection outside the bin. */
static _GstBinOutsideSchedule *
gst_bin_create_plan_outside (GstBin *bin, GstElement *element)
{
GList *pads;
GstPad *pad;
gboolean dedicated = TRUE;
cothread_state *threadstate;
_GstBinOutsideSchedule *sched;
// walk through all the pads, find out of this is hard or not
pads = gst_element_get_pad_list (element);
while (pads) {
pad = GST_PAD (pads->data);
// if the pad's peer's parent isn't the Bin, it's hard
// FIXME gst_pad_get_parent should return a GstElement
if (gst_pad_get_parent (pad->peer) != GST_OBJECT (bin))
dedicated = FALSE;
pads = g_list_next (pads);
}
// if the element is wholely in the Bin, create a plugin context
if (dedicated == TRUE) {
if (element->threadstate == NULL) {
element->threadstate = cothread_create (bin->threadcontext);
DEBUG("created element threadstate %p for \"%s\"\n",element->threadstate,
gst_element_get_name(element));
}
// set the cothread loopfunc
if (GST_IS_SRC(element))
cothread_setfunc (element->threadstate, gst_bin_src_wrapper,
0, (char **)element);
else if (GST_IS_CONNECTION(element))
cothread_setfunc (element->threadstate, gst_bin_connection_wrapper,
0, (char **)element);
}
// otherwise, we have some work to do
else {
// create a cothread state
threadstate = cothread_create (bin->threadcontext);
// construct an outside schedule struct
sched = g_new0(_GstBinOutsideSchedule,1);
sched->element = element;
sched->bin = bin;
sched->threadstate = threadstate;
// loop through the pads again looking for candidates
pads = gst_element_get_pad_list (element);
while (pads) {
pad = GST_PAD (pads->data);
// if the pad's peer's parent is this bin, it's a candidate
// FIXME gst_pad_get_parent should return a GstElement
if (gst_pad_get_parent (pad->peer) == GST_OBJECT(bin))
sched->padlist = g_slist_prepend(sched->padlist,pad);
pads = g_list_next (pads);
}
// add this schedule to the list of outside schedules
bin->outside_schedules = g_list_prepend(bin->outside_schedules,sched);
// set the cothread loopfunc
cothread_setfunc (sched->threadstate, gst_bin_sched_wrapper,
0, (char **)sched);
}
}
static void
gst_bin_create_plan_func (GstBin *bin)
{
const gchar *binname = gst_element_get_name(GST_ELEMENT(bin));
GList *elements;
GstElement *element;
int sink_pads;
GList *pads;
GstPad *pad, *peer;
GstElement *outside;
DEBUG_SET_STRING("(\"%s\")",gst_element_get_name(GST_ELEMENT(bin)));
DEBUG_ENTER_STRING;
// 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);
DEBUG("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) {
DEBUG("loop based element \"%s\" in bin \"%s\"\n",
gst_element_get_name (element),
gst_element_get_name (GST_ELEMENT (bin)));
bin->need_cothreads = TRUE;
DEBUG("NEED COTHREADS, it's \"%s\"'s fault\n",gst_element_get_name(element));
break;
}
// if it's a complex element, use cothreads
else if (GST_ELEMENT_IS_MULTI_IN (element)) {
DEBUG("complex element \"%s\" in bin \"%s\"\n",
gst_element_get_name (element),
gst_element_get_name (GST_ELEMENT (bin)));
bin->need_cothreads = TRUE;
DEBUG("NEED COTHREADS, it's \"%s\"'s fault\n",gst_element_get_name(element));
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) {
DEBUG("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;
DEBUG("NEED COTHREADS, it's \"%s\"'s fault\n",gst_element_get_name(element));
break;
}
elements = g_list_next (elements);
}
// FIXME
// bin->need_cothreads &= bin->use_cothreads;
// FIXME temporary testing measure
if (bin->use_cothreads) bin->need_cothreads = TRUE;
// clear previous plan state
g_list_free (bin->entries);
bin->entries = NULL;
bin->numentries = 0;
if (bin->need_cothreads) {
// first create thread context
if (bin->threadcontext == NULL) {
bin->threadcontext = cothread_init ();
DEBUG("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);
DEBUG("created element threadstate %p for \"%s\"\n",element->threadstate,
gst_element_get_name(element));
}
if (GST_IS_BIN (element)) {
gst_bin_create_plan (GST_BIN (element));
} else if (GST_IS_SRC (element)) {
DEBUG("adding '%s' as entry point\n",gst_element_get_name (element));
bin->entries = g_list_prepend (bin->entries,element);
bin->numentries++;
cothread_setfunc(element->threadstate,gst_bin_src_wrapper,0,(char **)element);
}
pads = gst_element_get_pad_list (element);
while (pads) {
pad = GST_PAD(pads->data);
if (gst_pad_get_direction (pad) == GST_PAD_SRC) {
DEBUG("checking/setting push proxy for srcpad %s:%s\n",
GST_DEBUG_PAD_NAME(pad));
// set the proxy functions
if (!pad->pushfunc)
pad->pushfunc = gst_bin_pushfunc_proxy;
} else if (gst_pad_get_direction (pad) == GST_PAD_SINK) {
DEBUG("checking/setting pull proxies for sinkpad %s:%s\n",GST_DEBUG_PAD_NAME(pad));
// set the proxy functions
if (!pad->pullfunc)
pad->pullfunc = gst_bin_pullfunc_proxy;
if (!pad->pullregionfunc)
pad->pullregionfunc = gst_bin_pullregionfunc_proxy;
// ***** check for possible connections outside
// get the pad's peer
peer = gst_pad_get_peer (pad);
// FIXME this should be an error condition, if not disabled
if (!peer) break;
// get the parent of the peer of the pad
outside = GST_ELEMENT (gst_pad_get_parent (peer));
// FIXME this should *really* be an error condition
if (!outside) break;
/* if it's a source or connection and it's not ours... */
if ((GST_IS_SRC (outside) || GST_IS_CONNECTION (outside)) &&
(gst_object_get_parent (GST_OBJECT (outside)) != GST_OBJECT (bin))) {
DEBUG("element '%s' outside bin is an entry\n",gst_element_get_name(outside));
/*
bin->entries = g_list_prepend (bin->entries,outside);
bin->numentries++;
if (outside->threadstate == NULL) {
outside->threadstate = cothread_create (bin->threadcontext);
DEBUG("created element threadstate %p for \"%s\"\n",outside->threadstate,
gst_element_get_name(outside));
}
cothread_setfunc(outside->threadstate,gst_bin_connection_wrapper,0,(char **)outside);
*/
bin->entries = g_list_prepend (bin->entries, gst_bin_create_plan_outside(bin,outside));
}
}
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 '%s': found SINK pad %s:%s\n", binname, GST_DEBUG_PAD_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;
GList *pads;
GstPad *pad;
_GstBinOutsideSchedule *sched;
DEBUG_SET_STRING("(\"%s\")", gst_element_get_name (GST_ELEMENT (bin)));
DEBUG_ENTER_STRING;
g_return_if_fail (bin != NULL);
g_return_if_fail (GST_IS_BIN (bin));
g_return_if_fail (GST_STATE (bin) == GST_STATE_PLAYING);
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
if (GST_IS_ELEMENT(bin->entries->data)) {
entry = GST_ELEMENT (bin->entries->data);
GST_FLAG_SET (entry, GST_ELEMENT_COTHREAD_STOPPING);
DEBUG("set COTHREAD_STOPPING flag on \"%s\"(%p)\n",
gst_element_get_name(entry),entry);
cothread_switch (entry->threadstate);
} else {
sched = (_GstBinOutsideSchedule *) (bin->entries->data);
sched->flags |= GST_ELEMENT_COTHREAD_STOPPING;
DEBUG("set COTHREAD STOPPING flag on sched for \"%s\"(%p)\n",
gst_element_get_name(sched->element),sched->element);
cothread_switch (sched->threadstate);
}
} 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_IS_CONNECTION (entry)) {
pads = entry->pads;
while (pads) {
pad = GST_PAD (pads->data);
if (pad->direction == GST_PAD_SRC) {
if (pad->pullfunc == NULL)
fprintf(stderr, "error, no pullfunc in \"%s\"\n", gst_element_get_name (entry));
else
(pad->pullfunc)(pad);
}
pads = g_list_next (pads);
}
// } 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 {
fprintf(stderr, "gstbin: entry \"%s\" cannot be handled\n", gst_element_get_name (entry));
g_assert_not_reached ();
}
entries = g_list_next (entries);
}
}
DEBUG_LEAVE("(%s)", gst_element_get_name (GST_ELEMENT (bin)));
}
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