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f7bace76aa
GST-Tensordecoder-ov_ep/gst/gstbin.c
Wim Taymans f7bace76aa Added check for vorbis. 
Original commit message from CVS:
Added check for vorbis.
Really compile with Xv extension if the library is found.
Changed the disksrc so that is goes to the PAUSE state if eof.
2000-09-17 14:06:18 +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 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",
};
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);
/* 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;
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)));
// 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),
return gst_bin_change_state_norecurse(bin);
}
static GstElementStateReturn gst_bin_change_state_norecurse(GstBin *bin) {
/*
if ((state == GST_STATE_READY) && (GST_STATE(bin) < GST_STATE_READY)) {
// gst_bin_create_plan(
}
*/
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;
// g_print("gst_bin_set_state_type(\"%s\",%d,%d)\n",
// gst_object_get_name(GST_OBJECT(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;
}
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);
}
/**
* 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);
children = bin->children;
while (children) {
child = GST_ELEMENT(children->data);
if (!strcmp(child->name,name))
return child;
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;
}
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);
}
static int gst_bin_loopfunc_wrapper(int argc,char *argv[]) {
GstElement *element = GST_ELEMENT(argv);
GList *pads;
GstPad *pad;
GstBuffer *buf;
// g_print("** 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 has loop function, calling it\n");
(element->loopfunc)(element);
DEBUG("** gst_bin_loopfunc_wrapper(): element ended loop function\n");
}
} else {
DEBUG("** gst_bin_loopfunc_wrapper(): element is chain-based, calling in infinite loop\n");
if (GST_IS_SRC(element)) {
//while (1) {
while (GST_STATE(element) == GST_STATE_PLAYING) {
DEBUG("** gst_bin_loopfunc_wrapper(): calling push function of source\n");
gst_src_push(GST_SRC(element));
}
} 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\n");
buf = gst_pad_pull(pad);
DEBUG("** gst_bin_loopfunc_wrapper(): calling chain function\n");
(pad->chainfunc)(pad,buf);
}
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_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, *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
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;
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);
}
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));
// if (pad->direction == GST_PAD_SRC)
pad->pushfunc = gst_bin_pushfunc_wrapper;
// else
pad->pullfunc = gst_bin_pullfunc_wrapper;
pads = g_list_next(pads);
}
elements = g_list_next(elements);
}
} else {
g_print("gstbin: don't need cothreads, looking for entry points\n");
// clear previous plan state
g_list_free(bin->entries);
bin->entries = NULL;
bin->numentries = 0;
// 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_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) {
/* 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))) {
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);
}
}
}
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);
g_return_if_fail(bin->numentries > 0);
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
//g_print("** in gst_bin_iterate_func()==================================%s\n",
// gst_element_get_name(GST_ELEMENT(bin->children->data)));
cothread_switch(GST_ELEMENT(bin->children->data)->threadstate);
} else {
entries = bin->entries;
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);
}
}
}
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