mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-06-01 19:02:18 +00:00
Code Issues 1 Projects Releases Wiki Activity
gstreamer/gst/gstbin.c
Erik Walthinsen 1762dfbf98 initial checkin 
Original commit message from CVS:
initial checkin
2000-01-30 09:03:00 +00:00

450 lines
13 KiB
C
Raw Blame History

/* 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.
*/
#include <gst/gst.h>
GstElementDetails gst_bin_details = {
"Generic bin",
"Bin",
"Simple container object",
VERSION,
"Erik Walthinsen <omega@cse.ogi.edu>",
"(C) 1999",
};
void gst_bin_real_destroy(GtkObject *object);
static gboolean gst_bin_change_state(GstElement *element,
GstElementState state);
static gboolean gst_bin_change_state_type(GstBin *bin,
GstElementState state,
GtkType type);
static gboolean gst_bin_change_state_norecurse(GstElement *element,
GstElementState state);
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);
/* 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,
GTK_TYPE_POINTER);
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;
gtkobject_class->destroy = gst_bin_real_destroy;
}
static void gst_bin_init(GstBin *bin) {
bin->numchildren = 0;
bin->children = NULL;
}
/**
* 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));
bin->children = g_list_append(bin->children,element);
bin->numchildren++;
gst_object_set_parent(GST_OBJECT(element),GST_OBJECT(bin));
if (GST_STATE_IS_SET(element,GST_STATE_COMPLETE)) {
if (!GST_STATE_IS_SET(bin,GST_STATE_COMPLETE))
gst_bin_change_state_norecurse(GST_ELEMENT(bin),GST_STATE_COMPLETE);
} else
gst_bin_change_state_norecurse(GST_ELEMENT(bin),~GST_STATE_COMPLETE);
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);
gst_object_unparent(GST_OBJECT(element));
bin->children = g_list_remove(bin->children,element);
bin->numchildren--;
}
static gboolean gst_bin_change_state(GstElement *element,
GstElementState state) {
GstBin *bin;
GList *children;
GstElement *child;
// g_print("gst_bin_change_state(\"%s\",%d);\n",
// gst_object_get_name(GST_OBJECT(bin)),state);
g_return_if_fail(GST_IS_BIN(element));
bin = GST_BIN(element);
g_return_if_fail(bin->numchildren != 0);
// 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_object_get_name(GST_OBJECT(child)));
if (!gst_element_set_state(child,state)) {
g_print("child %p failed to set state 0x%08x\n",child,state);
return FALSE;
}
// g_print("\n");
children = g_list_next(children);
}
// g_print("<-- \"%s\"\n",gst_object_get_name(GST_OBJECT(bin)));
if (GST_ELEMENT_CLASS(parent_class)->change_state)
return GST_ELEMENT_CLASS(parent_class)->change_state(element,state);
return TRUE;
}
static gboolean gst_bin_change_state_norecurse(GstElement *element,
GstElementState state) {
GstBin *bin;
g_return_if_fail(GST_IS_BIN(element));
bin = GST_BIN(element);
g_return_if_fail(bin->numchildren != 0);
if (GST_ELEMENT_CLASS(parent_class)->change_state)
return GST_ELEMENT_CLASS(parent_class)->change_state(element,state);
return TRUE;
}
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_if_fail(GST_IS_BIN(bin));
g_return_if_fail(bin->numchildren != 0);
// 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);
}
// g_print("<-- \"%s\"\n",gst_object_get_name(GST_OBJECT(bin)));
if (type == GST_TYPE_BIN)
gst_element_change_state(GST_ELEMENT(bin),state);
return TRUE;
}
gboolean gst_bin_set_state_type(GstBin *bin,
GstElementState state,
GtkType type) {
GstBinClass *oclass;
// g_print("gst_bin_set_state_type(\"%s\",%d,%d)\n",
// gst_object_get_name(GST_OBJECT(bin)),state,type);
g_return_if_fail(bin != NULL);
g_return_if_fail(GST_IS_BIN(bin));
oclass = GST_BIN_CLASS(GTK_OBJECT(bin)->klass);
if (oclass->change_state_type)
(oclass->change_state_type)(bin,state,type);
}
void gst_bin_real_destroy(GtkObject *object) {
GstBin *bin = GST_BIN(object);
GList *children;
GstElement *child;
// g_print("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);
}
GstElement *gst_bin_get_by_name(GstBin *bin,gchar *name) {
GList *children;
GstElement *child;
g_return_if_fail(bin != NULL);
g_return_if_fail(GST_IS_BIN(bin));
g_return_if_fail(name != NULL);
children = bin->children;
while (children) {
child = GST_ELEMENT(children->data);
if (!strcmp(child->name,name))
return child;
children = g_list_next(children);
}
return NULL;
}
GList *gst_bin_get_list(GstBin *bin) {
g_return_if_fail(bin != NULL);
g_return_if_fail(GST_IS_BIN(bin));
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);
}
}
void gst_bin_iterate(GstBin *bin) {
GstBinClass *oclass;
oclass = GST_BIN_CLASS(GTK_OBJECT(bin)->klass);
if (oclass->iterate)
(oclass->iterate)(bin);
}
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);
}
static void gst_bin_create_plan_func(GstBin *bin) {
GList *elements;
GstElement *element;
GList *pads;
GstPad *pad, *peer;
GstElement *outside;
bin->numentries = 0;
g_print("attempting to create a plan for bin %p\n",bin);
/* walk through all the elements to figure out all kinds of things */
elements = GST_BIN(bin)->children;
while (elements) {
element = GST_ELEMENT(elements->data);
// have to use cothreads if any elements use loop functions
if (element->loopfunc != NULL) {
if (bin->threadcontext == NULL) {
g_print("initializing cothread context\n");
bin->threadcontext = cothread_init();
}
if (element->threadstate == NULL) {
g_print("creating thread state for element\n");
element->threadstate = cothread_create(bin->threadcontext);
cothread_setfunc(element->threadstate,gst_element_loopfunc_wrapper,
0,element);
}
}
/* we need to find all the entry points into the bin */
if (GST_IS_SRC(element)) {
g_print("element '%s' is a source entry point for the bin\n",
gst_element_get_name(GST_ELEMENT(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) {
/* 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))) {
g_print("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);
}
g_print("have %d entries into bin\n",bin->numentries);
}
void gst_bin_iterate_func(GstBin *bin) {
GList *entries;
GstElement *entry;
g_return_if_fail(bin != NULL);
g_return_if_fail(GST_IS_BIN(bin));
// g_return_if_fail(GST_FLAG_IS_SET(thread,GST_STATE_RUNNING));
g_return_if_fail(bin->numentries > 0);
entries = bin->entries;
g_print("iterating\n");
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
g_assert_not_reached();
entries = g_list_next(entries);
}
// g_print(",");
}
Reference in a new issue View git blame Copy permalink