mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-06-15 12:30:41 +00:00
Code Issues 1 Projects Releases Wiki Activity

More massive changes to the scheduling system. Moved the scheduling code to gstscheduler.[ch], so an child bin can r...

Browse source 
Original commit message from CVS:
More massive changes to the scheduling system.  Moved the scheduling code
to gstscheduler.[ch], so an child bin can replace the scheduler.
Introduced the concept of chains, which are subsets of the list of managed
elements for a given manager bin, which get scheduled as separate entities.
gst_bin_iterate_func should be pretty much fixed now, the scheduling code
gets to do all the hard work.

Cothreaded case work in the couple tests I've tried, chained is next.
This commit is contained in:
Erik Walthinsen 2000-12-26 23:51:04 +00:00
parent a1268abbd6
commit a46c5a73f0
14 changed files with 822 additions and 455 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
gst/Makefile.am
View file

@ -46,7 +46,8 @@ libgst_la_SOURCES = \
gstmeta.c \
gsttee.c \
gstxml.c \
cothreads.c
cothreads.c \
gstscheduler.c
libgstincludedir = $(includedir)/gst
libgstinclude_HEADERS = \
@ -78,7 +79,8 @@ libgstinclude_HEADERS = \
gsttee.h \
gstxml.h \
gstdebug.h \
cothreads.h
cothreads.h \
gstscheduler.h
noinst_HEADERS = \
gstarch.h \

1
gst/elements/gstidentity.c
View file

@ -134,6 +134,7 @@ gst_identity_loop (GstElement *element)
do {
buf = gst_pad_pull (identity->sinkpad);
g_print("(%s:%s)i ",GST_DEBUG_PAD_NAME(identity->sinkpad));
gst_pad_push (identity->srcpad, buf);

19
gst/elements/gstqueue.c
View file

@ -49,6 +49,7 @@ enum {
ARG_0,
ARG_LEVEL,
ARG_MAX_LEVEL,
ARG_BLOCK,
};
@ -106,6 +107,8 @@ gst_queue_class_init (GstQueueClass *klass)
GTK_ARG_READABLE, ARG_LEVEL);
gtk_object_add_arg_type ("GstQueue::max_level", GTK_TYPE_INT,
GTK_ARG_READWRITE, ARG_MAX_LEVEL);
gtk_object_add_arg_type ("GstQueue::block", GTK_TYPE_BOOL,
GTK_ARG_READWRITE, ARG_BLOCK);
gtkobject_class->set_arg = gst_queue_set_arg;
gtkobject_class->get_arg = gst_queue_get_arg;
@ -116,7 +119,8 @@ gst_queue_class_init (GstQueueClass *klass)
static void
gst_queue_init (GstQueue *queue)
{
GST_FLAG_SET (queue, GST_ELEMENT_SCHEDULE_PASSIVELY);
// scheduling on this kind of element is, well, interesting
GST_FLAG_SET (queue, GST_ELEMENT_DECOUPLED);
queue->sinkpad = gst_pad_new ("sink", GST_PAD_SINK);
gst_pad_set_chain_function (queue->sinkpad, GST_DEBUG_FUNCPTR(gst_queue_chain));
@ -129,6 +133,7 @@ gst_queue_init (GstQueue *queue)
queue->queue = NULL;
queue->level_buffers = 0;
queue->max_buffers = 20;
queue->block = TRUE;
queue->level_bytes = 0;
queue->size_buffers = 0;
queue->size_bytes = 0;
@ -237,6 +242,12 @@ gst_queue_get (GstPad *pad)
DEBUG("queue: %s push %d %ld %p\n", name, queue->level_buffers, pthread_self (), queue->emptycond);
DEBUG("queue: %s have queue lock\n", name);
// we bail if there's nothing there
if (!queue->level_buffers && !queue->block) {
GST_UNLOCK(queue);
return NULL;
}
while (!queue->level_buffers) {
STATUS("queue: %s U released lock\n");
GST_UNLOCK (queue);
@ -312,6 +323,9 @@ gst_queue_set_arg (GtkObject *object, GtkArg *arg, guint id)
case ARG_MAX_LEVEL:
queue->max_buffers = GTK_VALUE_INT (*arg);
break;
case ARG_BLOCK:
queue->block = GTK_VALUE_BOOL (*arg);
break;
default:
break;
}
@ -334,6 +348,9 @@ gst_queue_get_arg (GtkObject *object, GtkArg *arg, guint id)
case ARG_MAX_LEVEL:
GTK_VALUE_INT (*arg) = queue->max_buffers;
break;
case ARG_BLOCK:
GTK_VALUE_BOOL (*arg) = queue->block;
break;
default:
arg->type = GTK_TYPE_INVALID;
break;

1
gst/elements/gstqueue.h
View file

@ -59,6 +59,7 @@ struct _GstQueue {
gint level_buffers; /* number of buffers queued here */
gint max_buffers; /* maximum number of buffers queued here */
gboolean block; /* if set to FALSE, _get returns NULL if queue empty */
gint level_bytes; /* number of bytes queued here */
gint size_buffers; /* size of queue in buffers */
gint size_bytes; /* size of queue in bytes */

532
gst/gstbin.c
View file

@ -24,6 +24,8 @@
#include "gstsrc.h"
#include "gstconnection.h"
#include "gstscheduler.h"
GstElementDetails gst_bin_details = {
"Generic bin",
"Bin",
@ -43,6 +45,7 @@ static gboolean gst_bin_change_state_type (GstBin *bin,
GtkType type);
static void gst_bin_create_plan_func (GstBin *bin);
//static void gst_bin_schedule_func (GstBin *bin);
static void gst_bin_iterate_func (GstBin *bin);
static xmlNodePtr gst_bin_save_thyself (GstElement *element, xmlNodePtr parent);
@ -109,6 +112,7 @@ gst_bin_class_init (GstBinClass *klass)
klass->change_state_type = gst_bin_change_state_type;
klass->create_plan = gst_bin_create_plan_func;
klass->schedule = gst_bin_schedule_func;
klass->iterate = gst_bin_iterate_func;
gstelement_class->change_state = gst_bin_change_state;
@ -515,158 +519,28 @@ gst_bin_create_plan (GstBin *bin)
(oclass->create_plan) (bin);
}
/**
* gst_bin_schedule:
* @bin: #GstBin to schedule
*
* let the bin figure out how to handle the plugins in it.
*/
void
gst_bin_schedule (GstBin *bin)
{
GstBinClass *oclass;
oclass = GST_BIN_CLASS (GTK_OBJECT (bin)->klass);
if (oclass->schedule)
(oclass->schedule) (bin);
}
typedef struct {
gulong offset;
gulong size;
} region_struct;
static int
gst_bin_loopfunc_wrapper (int argc,char *argv[])
{
GstElement *element = GST_ELEMENT (argv);
G_GNUC_UNUSED const gchar *name = gst_element_get_name (element);
DEBUG_ENTER("(%d,'%s')",argc,name);
do {
DEBUG("calling loopfunc %s for element %s\n",
GST_DEBUG_FUNCPTR_NAME (element->loopfunc),name);
(element->loopfunc) (element);
DEBUG("element %s ended loop function\n", name);
} 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_chain_wrapper (int argc,char *argv[])
{
GstElement *element = GST_ELEMENT (argv);
G_GNUC_UNUSED const gchar *name = gst_element_get_name (element);
GList *pads;
GstPad *pad;
GstBuffer *buf;
DEBUG_ENTER("(\"%s\")",name);
DEBUG("stepping through pads\n");
do {
pads = element->pads;
while (pads) {
pad = GST_PAD (pads->data);
pads = g_list_next (pads);
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));
}
}
} 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;
GstBuffer *buf;
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 (element->threadstate, "region");
DEBUG("calling _getfunc for %s:%s\n",GST_DEBUG_PAD_NAME(pad));
if (region) {
//gst_src_push_region (GST_SRC (element), region->offset, region->size);
if (pad->getregionfunc == NULL)
fprintf(stderr,"error, no getregionfunc in \"%s\"\n", name);
buf = (pad->getregionfunc)(pad, region->offset, region->size);
} else {
if (pad->getfunc == NULL)
fprintf(stderr,"error, no getfunc in \"%s\"\n", name);
buf = (pad->getfunc)(pad);
}
DEBUG("calling gst_pad_push on pad %s:%s\n",GST_DEBUG_PAD_NAME(pad));
gst_pad_push (pad, buf);
}
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 void
gst_bin_pushfunc_proxy (GstPad *pad, GstBuffer *buf)
{
cothread_state *threadstate = GST_ELEMENT(pad->parent)->threadstate;
DEBUG_ENTER("(%s:%s)",GST_DEBUG_PAD_NAME(pad));
DEBUG("putting buffer %p in peer's pen\n",buf);
pad->peer->bufpen = buf;
DEBUG("switching to %p (@%p)\n",threadstate,&(GST_ELEMENT(pad->parent)->threadstate));
cothread_switch (threadstate);
DEBUG("done switching\n");
}
static GstBuffer*
gst_bin_pullfunc_proxy (GstPad *pad)
{
GstBuffer *buf;
cothread_state *threadstate = GST_ELEMENT(pad->parent)->threadstate;
DEBUG_ENTER("(%s:%s)",GST_DEBUG_PAD_NAME(pad));
if (pad->bufpen == NULL) {
DEBUG("switching to %p (@%p)\n",threadstate,&(GST_ELEMENT(pad->parent)->threadstate));
cothread_switch (threadstate);
}
DEBUG("done switching\n");
buf = pad->bufpen;
pad->bufpen = NULL;
return buf;
}
static GstBuffer *
gst_bin_chainfunc_proxy (GstPad *pad)
{
GstBuffer *buf;
}
// FIXME!!!
static void
gst_bin_pullregionfunc_proxy (GstPad *pad,
gulong offset,
gulong size)
{
region_struct region;
cothread_state *threadstate;
DEBUG_ENTER("%s:%s,%ld,%ld",GST_DEBUG_PAD_NAME(pad),offset,size);
region.offset = offset;
region.size = size;
threadstate = GST_ELEMENT(pad->parent)->threadstate;
cothread_set_data (threadstate, "region", &region);
cothread_switch (threadstate);
cothread_set_data (threadstate, "region", NULL);
}
static void
gst_bin_create_plan_func (GstBin *bin)
@ -675,12 +549,14 @@ gst_bin_create_plan_func (GstBin *bin)
GList *elements;
GstElement *element;
const gchar *elementname;
GSList *pending_bins = NULL;
GSList *pending = NULL;
GstBin *pending_bin;
GList *pads;
GstPad *pad;
GstElement *peer_manager;
cothread_func wrapper_function;
// GList *pads;
// GstPad *pad;
// GstElement *peer_manager;
// cothread_func wrapper_function;
// _GstBinChain *chain;
// GList *chains;
DEBUG_SET_STRING("(\"%s\")",gst_element_get_name (GST_ELEMENT (bin)));
DEBUG_ENTER_STRING;
@ -737,16 +613,18 @@ gst_bin_create_plan_func (GstBin *bin)
// if it's a loop-based element, use cothreads
if (element->loopfunc != NULL) {
DEBUG("requiring cothreads because \"%s\" is a loop-based element\n",elementname);
bin->need_cothreads = TRUE;
GST_FLAG_SET (element, GST_ELEMENT_USE_COTHREAD);
// if it's a 'complex' element, use cothreads
} else if (GST_FLAG_IS_SET (element, GST_ELEMENT_COMPLEX)) {
DEBUG("requiring cothreads because \"%s\" is complex\n",elementname);
bin->need_cothreads = TRUE;
GST_FLAG_SET (element, GST_ELEMENT_USE_COTHREAD);
// if the element has more than one sink pad, use cothreads
} else if (element->numsinkpads > 1) {
DEBUG("requiring cothreads because \"%s\" has more than one sink pad\n",elementname);
bin->need_cothreads = TRUE;
GST_FLAG_SET (element, GST_ELEMENT_USE_COTHREAD);
}
if (GST_FLAG_IS_SET (element, GST_ELEMENT_USE_COTHREAD))
bin->need_cothreads = TRUE;
}
}
@ -768,11 +646,11 @@ gst_bin_create_plan_func (GstBin *bin)
// find all the managed children
// here we pull off the trick of walking an entire arbitrary tree without recursion
DEBUG("attempting to find all the elements to manage\n");
pending_bins = g_slist_prepend (pending_bins, bin);
pending = g_slist_prepend (pending, bin);
do {
// retrieve the top of the stack and pop it
pending_bin = GST_BIN (pending_bins->data);
pending_bins = g_slist_remove (pending_bins, pending_bin);
pending_bin = GST_BIN (pending->data);
pending = g_slist_remove (pending, pending_bin);
// walk the list of elements, find bins, and do stuff
DEBUG("checking Bin \"%s\" for managed elements\n",
@ -790,7 +668,7 @@ gst_bin_create_plan_func (GstBin *bin)
// if it's a Bin, add it to the list of Bins to check
if (GST_IS_BIN (element)) {
DEBUG("flattened recurse into \"%s\"\n",elementname);
pending_bins = g_slist_prepend (pending_bins, element);
pending = g_slist_prepend (pending, element);
// otherwise add it to the list of elements
} else {
DEBUG("found element \"%s\" that I manage\n",elementname);
@ -799,129 +677,11 @@ gst_bin_create_plan_func (GstBin *bin)
}
}
}
} while (pending_bins);
} while (pending);
DEBUG("have %d elements to manage, implementing plan\n",bin->num_managed_elements);
// If cothreads are needed, we need to not only find elements but
// set up cothread states and various proxy functions.
if (bin->need_cothreads) {
DEBUG("bin is using cothreads\n");
// first create thread context
if (bin->threadcontext == NULL) {
DEBUG("initializing cothread context\n");
bin->threadcontext = cothread_init ();
}
// walk through all the children
elements = bin->managed_elements;
while (elements) {
element = GST_ELEMENT (elements->data);
elements = g_list_next (elements);
// start out with a NULL warpper function, we'll set it if we want a cothread
wrapper_function = NULL;
// have to decide if we need to or can use a cothreads, and if so which wrapper
// first of all, if there's a loopfunc, the decision's already made
if (element->loopfunc != NULL) {
wrapper_function = GST_DEBUG_FUNCPTR(gst_bin_loopfunc_wrapper);
DEBUG("element %s is a loopfunc, must use a cothread\n",gst_element_get_name(element));
} else {
// otherwise we need to decide if it needs a cothread
// if it's complex, or cothreads are preferred and it's *not* passive, cothread it
if (GST_FLAG_IS_SET (element,GST_ELEMENT_COMPLEX) ||
(GST_FLAG_IS_SET (bin,GST_BIN_FLAG_PREFER_COTHREADS) &&
!GST_FLAG_IS_SET (element,GST_ELEMENT_SCHEDULE_PASSIVELY))) {
// base it on whether we're going to loop through source or sink pads
if (element->numsinkpads == 0)
wrapper_function = GST_DEBUG_FUNCPTR(gst_bin_src_wrapper);
else
wrapper_function = GST_DEBUG_FUNCPTR(gst_bin_chain_wrapper);
}
}
// walk through the all the pads for this element, setting proxy functions
// the selection of proxy functions depends on whether we're in a cothread or not
pads = gst_element_get_pad_list (element);
while (pads) {
pad = GST_PAD (pads->data);
pads = g_list_next (pads);
// check to see if someone else gets to set up the element
peer_manager = GST_ELEMENT((pad)->peer->parent)->manager;
if (peer_manager != GST_ELEMENT(bin)) {
DEBUG("WARNING: pad %s:%s is connected outside of bin\n",GST_DEBUG_PAD_NAME(pad));
}
// if the wrapper_function is set, we need to use the proxy functions
if (wrapper_function != NULL) {
// set up proxy functions
if (gst_pad_get_direction (pad) == GST_PAD_SINK) {
DEBUG("setting push proxy for sinkpad %s:%s\n",GST_DEBUG_PAD_NAME(pad));
pad->pushfunc = GST_DEBUG_FUNCPTR(gst_bin_pushfunc_proxy);
} else if (gst_pad_get_direction (pad) == GST_PAD_SRC) {
DEBUG("setting pull proxy for srcpad %s:%s\n",GST_DEBUG_PAD_NAME(pad));
pad->pullfunc = GST_DEBUG_FUNCPTR(gst_bin_pullfunc_proxy);
}
} else {
// otherwise we need to set up for 'traditional' chaining
if (gst_pad_get_direction (pad) == GST_PAD_SINK) {
// we can just copy the chain function, since it shares the prototype
DEBUG("copying chain function into push proxy for %s:%s\n",
GST_DEBUG_PAD_NAME(pad));
pad->pushfunc = pad->chainfunc;
} else if (gst_pad_get_direction (pad) == GST_PAD_SRC) {
// we can just copy the get function, since it shares the prototype
DEBUG("copying get function into pull proxy for %s:%s\n",
GST_DEBUG_PAD_NAME(pad));
pad->pullfunc = pad->getfunc;
}
}
}
// if a loopfunc has been specified, create and set up a cothread
if (wrapper_function != NULL) {
if (element->threadstate == NULL) {
element->threadstate = cothread_create (bin->threadcontext);
DEBUG("created cothread %p (@%p) for \"%s\"\n",element->threadstate,
&element->threadstate,gst_element_get_name(element));
}
cothread_setfunc (element->threadstate, wrapper_function, 0, (char **)element);
DEBUG("set wrapper function for \"%s\" to &%s\n",gst_element_get_name(element),
GST_DEBUG_FUNCPTR_NAME(wrapper_function));
}
// // HACK: if the element isn't passive, it's an entry
// if (!GST_FLAG_IS_SET(element,GST_ELEMENT_SCHEDULE_PASSIVELY))
// bin->entries = g_list_append(bin->entries, element);
}
// otherwise, cothreads are not needed
} else {
DEBUG("bin is chained, no cothreads needed\n");
elements = bin->managed_elements;
while (elements) {
element = GST_ELEMENT (elements->data);
elements = g_list_next (elements);
pads = gst_element_get_pad_list (element);
while (pads) {
pad = GST_PAD (pads->data);
pads = g_list_next (pads);
if (gst_pad_get_direction (pad) == GST_PAD_SINK) {
DEBUG("copying chain function into push proxy for %s:%s\n",GST_DEBUG_PAD_NAME(pad));
pad->pushfunc = pad->chainfunc;
} else {
DEBUG("copying get function into pull proxy for %s:%s\n",GST_DEBUG_PAD_NAME(pad));
pad->pullfunc = pad->getfunc;
}
}
}
}
gst_bin_schedule(bin);
DEBUG_LEAVE("(\"%s\")",gst_element_get_name(GST_ELEMENT(bin)));
}
@ -929,6 +689,8 @@ gst_bin_create_plan_func (GstBin *bin)
void
gst_bin_iterate_func (GstBin *bin)
{
GList *chains;
_GstBinChain *chain;
GList *entries;
GstElement *entry;
GList *pads;
@ -942,187 +704,61 @@ gst_bin_iterate_func (GstBin *bin)
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
DEBUG("starting iteration via cothreads\n");
// step through all the chains
chains = bin->chains;
while (chains) {
chain = (_GstBinChain *)(chains->data);
chains = g_list_next (chains);
entry = GST_ELEMENT (bin->managed_elements->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);
if (chain->use_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("starting iteration via cothreads\n");
} else {
DEBUG("starting iteration via chain-functions\n");
entry = GST_ELEMENT (chain->elements->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);
if (bin->num_entries <= 0) {
DEBUG("no entries in bin \"%s\", trying managed elements...\n",
gst_element_get_name(GST_ELEMENT(bin)));
// we will try loop over the elements then...
entries = bin->managed_elements;
}
else {
entries = bin->entries;
}
} else {
DEBUG("starting iteration via chain-functions\n");
g_assert (entries != NULL);
entries = chain->entries;
while (entries) {
entry = GST_ELEMENT (entries->data);
entries = g_list_next (entries);
g_assert (entries != NULL);
DEBUG("have entry \"%s\"\n",gst_element_get_name(entry));
while (entries) {
entry = GST_ELEMENT (entries->data);
entries = g_list_next (entries);
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) {
DEBUG("calling getfunc of %s:%s\n",GST_DEBUG_PAD_NAME(pad));
if (pad->getfunc == NULL)
fprintf(stderr, "error, no getfunc in \"%s\"\n", gst_element_get_name (entry));
else
buf = (pad->getfunc)(pad);
gst_pad_push(pad,buf);
DEBUG("have entry \"%s\"\n",gst_element_get_name(entry));
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) {
DEBUG("calling getfunc of %s:%s\n",GST_DEBUG_PAD_NAME(pad));
if (pad->getfunc == NULL)
fprintf(stderr, "error, no getfunc in \"%s\"\n", gst_element_get_name (entry));
else
buf = (pad->getfunc)(pad);
gst_pad_push(pad,buf);
}
pads = g_list_next (pads);
}
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 ();
}
// } 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 ();
}
}
}
DEBUG_LEAVE("(%s)", gst_element_get_name (GST_ELEMENT (bin)));
}
/*
// ***** 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))) {
if (gst_pad_get_direction (pad) == GST_PAD_SINK) {
DEBUG("dealing with outside source element %s\n",gst_element_get_name(outside));
// DEBUG("PUNT: copying pullfunc ptr from %s:%s to %s:%s (@ %p)\n",
//GST_DEBUG_PAD_NAME(pad->peer),GST_DEBUG_PAD_NAME(pad),&pad->pullfunc);
// pad->pullfunc = pad->peer->pullfunc;
// DEBUG("PUNT: setting pushfunc proxy to fake proxy on %s:%s\n",GST_DEBUG_PAD_NAME(pad->peer));
// pad->peer->pushfunc = GST_DEBUG_FUNCPTR(gst_bin_pushfunc_fake_proxy);
pad->pullfunc = GST_DEBUG_FUNCPTR(gst_bin_pullfunc_proxy);
}
} else {
*/
/*
} else if (GST_IS_SRC (element)) {
DEBUG("adding '%s' as entry point, because it's a source\n",gst_element_get_name (element));
bin->entries = g_list_prepend (bin->entries,element);
bin->num_entries++;
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_SINK) {
DEBUG("setting push proxy for sinkpad %s:%s\n",GST_DEBUG_PAD_NAME(pad));
// set the proxy functions
pad->pushfunc = GST_DEBUG_FUNCPTR(gst_bin_pushfunc_proxy);
DEBUG("pushfunc %p = gst_bin_pushfunc_proxy %p\n",&pad->pushfunc,gst_bin_pushfunc_proxy);
} else if (gst_pad_get_direction (pad) == GST_PAD_SRC) {
DEBUG("setting pull proxies for srcpad %s:%s\n",GST_DEBUG_PAD_NAME(pad));
// set the proxy functions
pad->pullfunc = GST_DEBUG_FUNCPTR(gst_bin_pullfunc_proxy);
DEBUG("pad->pullfunc(@%p) = gst_bin_pullfunc_proxy(@%p)\n",
&pad->pullfunc,gst_bin_pullfunc_proxy);
pad->pullregionfunc = GST_DEBUG_FUNCPTR(gst_bin_pullregionfunc_proxy);
}
pads = g_list_next (pads);
}
elements = g_list_next (elements);
// if there are no entries, we have to pick one at random
if (bin->num_entries == 0)
bin->entries = g_list_prepend (bin->entries, GST_ELEMENT(bin->children->data));
}
} else {
DEBUG("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);
DEBUG("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)) {
DEBUG("adding '%s' as entry point, because it's a source\n",gst_element_get_name (element));
bin->entries = g_list_prepend (bin->entries, element);
bin->num_entries++;
}
// go through all the pads, set pointers, and check for connections
pads = gst_element_get_pad_list (element);
while (pads) {
pad = GST_PAD (pads->data);
if (gst_pad_get_direction (pad) == GST_PAD_SINK) {
DEBUG("found SINK pad %s:%s\n", GST_DEBUG_PAD_NAME(pad));
// copy the peer's chain function, easy enough
DEBUG("copying peer's chainfunc to %s:%s's pushfunc\n",GST_DEBUG_PAD_NAME(pad));
pad->pushfunc = GST_DEBUG_FUNCPTR(pad->peer->chainfunc);
// need to walk through and check for outside connections
//FIXME need to do this for all pads
// get the pad's peer
peer = gst_pad_get_peer (pad);
if (!peer) {
DEBUG("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->num_entries++;
}
}
else {
DEBUG("found pad %s\n", gst_pad_get_name (pad));
}
pads = g_list_next (pads);
}
elements = g_list_next (elements);
}
*/

17
gst/gstbin.h
View file

@ -54,6 +54,7 @@ typedef enum {
typedef struct _GstBin GstBin;
typedef struct _GstBinClass GstBinClass;
typedef struct __GstBinChain _GstBinChain;
struct _GstBin {
GstElement element;
@ -66,12 +67,14 @@ struct _GstBin {
gboolean need_cothreads;
GList *managed_elements;
gint num_managed_elements;
GList *chains;
gint num_chains;
GList *entries;
gint num_entries;
cothread_context *threadcontext;
gboolean use_cothreads;
GList *outside_schedules;
};
struct _GstBinClass {
@ -87,10 +90,21 @@ struct _GstBinClass {
GtkType type);
/* create a plan for the execution of the bin */
void (*create_plan) (GstBin *bin);
void (*schedule) (GstBin *bin);
/* run a full iteration of operation */
void (*iterate) (GstBin *bin);
};
struct __GstBinChain {
GList *elements;
gint num_elements;
GList *entries;
gboolean use_cothreads;
GstElement *entry;
};
GtkType gst_bin_get_type (void);
@ -109,6 +123,7 @@ GstElement* gst_bin_get_by_name (GstBin *bin,
GList* gst_bin_get_list (GstBin *bin);
void gst_bin_create_plan (GstBin *bin);
void gst_bin_schedule (GstBin *bin);
gboolean gst_bin_set_state_type (GstBin *bin,
GstElementState state,
GtkType type);

2
gst/gstdebug.h
View file

@ -101,6 +101,7 @@ G_GNUC_UNUSED static GModule *_debug_self_module = NULL;
(_debug_string != NULL) ? \
fprintf(stderr,GST_DEBUG_PREFIX("%s: "format , _debug_string , ## args )) : \
fprintf(stderr,GST_DEBUG_PREFIX(": "format , ## args ))
#define DEBUG_NOPREFIX(format,args...) fprintf(stderr,format , ## args )
#define DEBUG_ENTER(format, args...) \
fprintf(stderr,GST_DEBUG_PREFIX(format": entering\n" , ## args ))
#define DEBUG_SET_STRING(format, args...) \
@ -112,6 +113,7 @@ G_GNUC_UNUSED static GModule *_debug_self_module = NULL;
#define DEBUG_LEAVE_STRING DEBUG_LEAVE("%s",_debug_string)
#else
#define DEBUG(format, args...)
#define DEBUG_NOPREFIX(format, args...)
#define DEBUG_ENTER(format, args...)
#define DEBUG_LEAVE(format, args...)
#define DEBUG_SET_STRING(format, args...)

7
gst/gstelement.h
View file

@ -85,8 +85,9 @@ static inline char *_gst_print_statename(int state) {
typedef enum {
// element is complex (for some def.) and generally require a cothread
GST_ELEMENT_COMPLEX = GST_OBJECT_FLAG_LAST,
// not to be scheduled directly, let others trigger all events
GST_ELEMENT_SCHEDULE_PASSIVELY,
// input and output pads aren't directly coupled to each other
// examples: queues, multi-output async readers, etc.
GST_ELEMENT_DECOUPLED,
// this element should be placed in a thread if at all possible
GST_ELEMENT_THREAD_SUGGESTED,
// this element is incable of seeking (FIXME: does this apply to filters?)
@ -96,6 +97,8 @@ typedef enum {
GST_ELEMENT_NEW_LOOPFUNC,
// the cothread holding this element needs to be stopped
GST_ELEMENT_COTHREAD_STOPPING,
// the element has to be scheduled as a cothread for any sanity
GST_ELEMENT_USE_COTHREAD,
/* use some padding for future expansion */
GST_ELEMENT_FLAG_LAST = GST_OBJECT_FLAG_LAST + 8,

631
gst/gstscheduler.c Normal file
View file

@ -0,0 +1,631 @@
/* 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 "gstscheduler.h"
#include "gstdebug.h"
static int
gst_bin_loopfunc_wrapper (int argc,char *argv[])
{
GstElement *element = GST_ELEMENT (argv);
G_GNUC_UNUSED const gchar *name = gst_element_get_name (element);
DEBUG_ENTER("(%d,'%s')",argc,name);
do {
DEBUG("calling loopfunc %s for element %s\n",
GST_DEBUG_FUNCPTR_NAME (element->loopfunc),name);
(element->loopfunc) (element);
DEBUG("element %s ended loop function\n", name);
} 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_chain_wrapper (int argc,char *argv[])
{
GstElement *element = GST_ELEMENT (argv);
G_GNUC_UNUSED const gchar *name = gst_element_get_name (element);
GList *pads;
GstPad *pad;
GstBuffer *buf;
DEBUG_ENTER("(\"%s\")",name);
DEBUG("stepping through pads\n");
do {
pads = element->pads;
while (pads) {
pad = GST_PAD (pads->data);
pads = g_list_next (pads);
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));
}
}
} 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;
GstBuffer *buf;
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 (element->threadstate, "region");
DEBUG("calling _getfunc for %s:%s\n",GST_DEBUG_PAD_NAME(pad));
// if (region) {
//gst_src_push_region (GST_SRC (element), region->offset, region->size);
// if (pad->getregionfunc == NULL)
// fprintf(stderr,"error, no getregionfunc in \"%s\"\n", name);
// buf = (pad->getregionfunc)(pad, region->offset, region->size);
// } else {
if (pad->getfunc == NULL)
fprintf(stderr,"error, no getfunc in \"%s\"\n", name);
buf = (pad->getfunc)(pad);
// }
DEBUG("calling gst_pad_push on pad %s:%s\n",GST_DEBUG_PAD_NAME(pad));
gst_pad_push (pad, buf);
}
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 void
gst_bin_pushfunc_proxy (GstPad *pad, GstBuffer *buf)
{
cothread_state *threadstate = GST_ELEMENT(pad->parent)->threadstate;
DEBUG_ENTER("(%s:%s)",GST_DEBUG_PAD_NAME(pad));
DEBUG("putting buffer %p in peer's pen\n",buf);
pad->peer->bufpen = buf;
DEBUG("switching to %p (@%p)\n",threadstate,&(GST_ELEMENT(pad->parent)->threadstate));
cothread_switch (threadstate);
DEBUG("done switching\n");
}
static GstBuffer*
gst_bin_pullfunc_proxy (GstPad *pad)
{
GstBuffer *buf;
cothread_state *threadstate = GST_ELEMENT(pad->parent)->threadstate;
DEBUG_ENTER("(%s:%s)",GST_DEBUG_PAD_NAME(pad));
if (pad->bufpen == NULL) {
DEBUG("switching to %p (@%p)\n",threadstate,&(GST_ELEMENT(pad->parent)->threadstate));
cothread_switch (threadstate);
}
DEBUG("done switching\n");
buf = pad->bufpen;
pad->bufpen = NULL;
return buf;
}
static GstBuffer *
gst_bin_chainfunc_proxy (GstPad *pad)
{
// FIXME!!
// GstBuffer *buf;
return NULL;
}
// FIXME!!!
static void
gst_bin_pullregionfunc_proxy (GstPad *pad,
gulong offset,
gulong size)
{
// region_struct region;
cothread_state *threadstate;
DEBUG_ENTER("%s:%s,%ld,%ld",GST_DEBUG_PAD_NAME(pad),offset,size);
// region.offset = offset;
// region.size = size;
// threadstate = GST_ELEMENT(pad->parent)->threadstate;
// cothread_set_data (threadstate, "region", &region);
cothread_switch (threadstate);
// cothread_set_data (threadstate, "region", NULL);
}
static void
gst_schedule_cothreaded_chain (GstBin *bin, _GstBinChain *chain) {
GList *elements;
GstElement *element;
cothread_func wrapper_function;
GList *pads;
GstPad *pad;
DEBUG("chain is using cothreads\n");
// first create thread context
if (bin->threadcontext == NULL) {
DEBUG("initializing cothread context\n");
bin->threadcontext = cothread_init ();
}
// walk through all the chain's elements
elements = chain->elements;
while (elements) {
element = GST_ELEMENT (elements->data);
elements = g_list_next (elements);
// start out without a wrapper function, we select it later
wrapper_function = NULL;
// if the element has a loopfunc...
if (element->loopfunc != NULL) {
wrapper_function = GST_DEBUG_FUNCPTR(gst_bin_loopfunc_wrapper);
DEBUG("\nelement '%s' is a loop-based\n",gst_element_get_name(element));
} else {
// otherwise we need to decide what kind of cothread
// if it's not DECOUPLED, we decide based on whether it's a source or not
if (!GST_FLAG_IS_SET (element, GST_ELEMENT_DECOUPLED)) {
// if it doesn't have any sinks, it must be a source (duh)
if (element->numsinkpads == 0) {
wrapper_function = GST_DEBUG_FUNCPTR(gst_bin_src_wrapper);
DEBUG("\nelement '%s' is a source, using _src_wrapper\n",gst_element_get_name(element));
} else {
wrapper_function = GST_DEBUG_FUNCPTR(gst_bin_chain_wrapper);
DEBUG("\nelement '%s' is a filter, using _chain_wrapper\n",gst_element_get_name(element));
}
}
}
// now we have to walk through the pads to set up their state
pads = gst_element_get_pad_list (element);
while (pads) {
pad = GST_PAD (pads->data);
pads = g_list_next (pads);
// if the element is DECOUPLED or outside the manager, we have to chain
if ((wrapper_function == NULL) ||
(GST_ELEMENT(pad->peer->parent)->manager != GST_ELEMENT(bin))) {
// set the chain proxies
if (gst_pad_get_direction (pad) == GST_PAD_SINK) {
DEBUG("copying chain function into push proxy for %s:%s\n",GST_DEBUG_PAD_NAME(pad));
pad->pushfunc = pad->chainfunc;
} else {
DEBUG("copying get function into pull proxy for %s:%s\n",GST_DEBUG_PAD_NAME(pad));
pad->pullfunc = pad->getfunc;
pad->pullregionfunc = pad->getregionfunc;
}
// otherwise we really are a cothread
} else {
if (gst_pad_get_direction (pad) == GST_PAD_SINK) {
DEBUG("setting cothreaded push proxy for sinkpad %s:%s\n",GST_DEBUG_PAD_NAME(pad));
pad->pushfunc = GST_DEBUG_FUNCPTR(gst_bin_pushfunc_proxy);
} else {
DEBUG("setting cothreaded pull proxy for srcpad %s:%s\n",GST_DEBUG_PAD_NAME(pad));
pad->pullfunc = GST_DEBUG_FUNCPTR(gst_bin_pullfunc_proxy);
}
}
}
// need to set up the cothread now
if (wrapper_function != NULL) {
if (element->threadstate == NULL) {
element->threadstate = cothread_create (bin->threadcontext);
DEBUG("created cothread %p for '%s'\n",element->threadstate,gst_element_get_name(element));
}
cothread_setfunc (element->threadstate, wrapper_function, 0, (char **)element);
DEBUG("set wrapper function for '%s' to &%s\n",gst_element_get_name(element),
GST_DEBUG_FUNCPTR_NAME(wrapper_function));
}
}
}
void gst_bin_schedule_func(GstBin *bin) {
// GstElement *manager;
GList *elements;
GstElement *element;
// const gchar *elementname;
GSList *pending = NULL;
// GstBin *pending_bin;
GList *pads;
GstPad *pad;
// GstElement *peer_manager;
GList *chains;
_GstBinChain *chain;
DEBUG_SET_STRING("(\"%s\")",gst_element_get_name (GST_ELEMENT (bin)));
DEBUG_ENTER_STRING;
// next we have to find all the separate scheduling chains
DEBUG("\nattempting to find scheduling chains...\n");
// first make a copy of the managed_elements we can mess with
elements = g_list_copy (bin->managed_elements);
// we have to repeat until the list is empty to get all chains
while (elements) {
element = GST_ELEMENT (elements->data);
// if this is a DECOUPLED element
if (GST_FLAG_IS_SET (element, GST_ELEMENT_DECOUPLED)) {
// skip this element entirely
DEBUG("skipping '%s' because it's decoupled\n",gst_element_get_name(element));
elements = g_list_next (elements);
continue;
}
DEBUG("starting with element '%s'\n",gst_element_get_name(element));
// prime the pending list with the first element off the top
pending = g_slist_prepend (NULL, element);
// and remove that one from the main list
elements = g_list_remove (elements, element);
// create a chain structure
chain = g_new0 (_GstBinChain, 1);
// for each pending element, walk the pipeline
do {
// retrieve the top of the stack and pop it
element = GST_ELEMENT (pending->data);
pending = g_slist_remove (pending, element);
// add ourselves to the chain's list of elements
DEBUG("adding '%s' to chain\n",gst_element_get_name(element));
chain->elements = g_list_prepend (chain->elements, element);
chain->num_elements++;
// set the cothreads flag as appropriate
if (GST_FLAG_IS_SET (element, GST_ELEMENT_USE_COTHREAD))
chain->use_cothreads = TRUE;
// if we're managed by the current bin, and we're not decoupled,
// go find all the peers and add them to the list of elements to check
if ((element->manager == GST_ELEMENT(bin)) &&
!GST_FLAG_IS_SET (element, GST_ELEMENT_DECOUPLED)) {
// remove ourselves from the outer list of all managed elements
DEBUG("removing '%s' from list of possible elements\n",gst_element_get_name(element));
elements = g_list_remove (elements, element);
// now we have to walk the pads to find peers
pads = gst_element_get_pad_list (element);
while (pads) {
pad = GST_PAD (pads->data);
pads = g_list_next (pads);
DEBUG("have pad %s:%s\n",GST_DEBUG_PAD_NAME(pad));
// only bother with if the pad's peer's parent is this bin or it's DECOUPLED
// only add it if it's in the list of un-visited elements still
if ((g_list_find (elements, pad->peer->parent) != NULL) ||
GST_FLAG_IS_SET (pad->peer->parent, GST_ELEMENT_DECOUPLED)) {
// add the peer element to the pending list
DEBUG("adding '%s' to list of pending elements\n",gst_element_get_name(GST_ELEMENT(pad->peer->parent)));
pending = g_slist_prepend (pending, GST_ELEMENT(pad->peer->parent));
} else
DEBUG("element '%s' has already been dealt with\n",gst_element_get_name(GST_ELEMENT(pad->peer->parent)));
}
}
} while (pending);
// add the chain to the bin
DEBUG("have chain with %d elements: ",chain->num_elements);
{ GList *elements = chain->elements;
while (elements) {
element = GST_ELEMENT (elements->data);
elements = g_list_next(elements);
DEBUG_NOPREFIX("%s, ",gst_element_get_name(element));
}
}
DEBUG_NOPREFIX("\n");
bin->chains = g_list_prepend (bin->chains, chain);
bin->num_chains++;
}
// free up the list in case it's full of DECOUPLED elements
g_list_free (elements);
DEBUG("\nwe have %d chains to schedule\n",bin->num_chains);
// now we have to go through all the chains and schedule them
chains = bin->chains;
while (chains) {
chain = (_GstBinChain *)(chains->data);
chains = g_list_next (chains);
// schedule as appropriate
if (chain->use_cothreads) {
gst_schedule_cothreaded_chain (bin,chain);
} else {
DEBUG("non-cothreaded case not coded yet\n");
}
}
DEBUG_LEAVE("(\"%s\")",gst_element_get_name(GST_ELEMENT(bin)));
}
/*
// ***** 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))) {
if (gst_pad_get_direction (pad) == GST_PAD_SINK) {
DEBUG("dealing with outside source element %s\n",gst_element_get_name(outside));
// DEBUG("PUNT: copying pullfunc ptr from %s:%s to %s:%s (@ %p)\n",
//GST_DEBUG_PAD_NAME(pad->peer),GST_DEBUG_PAD_NAME(pad),&pad->pullfunc);
// pad->pullfunc = pad->peer->pullfunc;
// DEBUG("PUNT: setting pushfunc proxy to fake proxy on %s:%s\n",GST_DEBUG_PAD_NAME(pad->peer));
// pad->peer->pushfunc = GST_DEBUG_FUNCPTR(gst_bin_pushfunc_fake_proxy);
pad->pullfunc = GST_DEBUG_FUNCPTR(gst_bin_pullfunc_proxy);
}
} else {
*/
/*
} else if (GST_IS_SRC (element)) {
DEBUG("adding '%s' as entry point, because it's a source\n",gst_element_get_name (element));
bin->entries = g_list_prepend (bin->entries,element);
bin->num_entries++;
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_SINK) {
DEBUG("setting push proxy for sinkpad %s:%s\n",GST_DEBUG_PAD_NAME(pad));
// set the proxy functions
pad->pushfunc = GST_DEBUG_FUNCPTR(gst_bin_pushfunc_proxy);
DEBUG("pushfunc %p = gst_bin_pushfunc_proxy %p\n",&pad->pushfunc,gst_bin_pushfunc_proxy);
} else if (gst_pad_get_direction (pad) == GST_PAD_SRC) {
DEBUG("setting pull proxies for srcpad %s:%s\n",GST_DEBUG_PAD_NAME(pad));
// set the proxy functions
pad->pullfunc = GST_DEBUG_FUNCPTR(gst_bin_pullfunc_proxy);
DEBUG("pad->pullfunc(@%p) = gst_bin_pullfunc_proxy(@%p)\n",
&pad->pullfunc,gst_bin_pullfunc_proxy);
pad->pullregionfunc = GST_DEBUG_FUNCPTR(gst_bin_pullregionfunc_proxy);
}
pads = g_list_next (pads);
}
elements = g_list_next (elements);
// if there are no entries, we have to pick one at random
if (bin->num_entries == 0)
bin->entries = g_list_prepend (bin->entries, GST_ELEMENT(bin->children->data));
}
} else {
DEBUG("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);
DEBUG("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)) {
DEBUG("adding '%s' as entry point, because it's a source\n",gst_element_get_name (element));
bin->entries = g_list_prepend (bin->entries, element);
bin->num_entries++;
}
// go through all the pads, set pointers, and check for connections
pads = gst_element_get_pad_list (element);
while (pads) {
pad = GST_PAD (pads->data);
if (gst_pad_get_direction (pad) == GST_PAD_SINK) {
DEBUG("found SINK pad %s:%s\n", GST_DEBUG_PAD_NAME(pad));
// copy the peer's chain function, easy enough
DEBUG("copying peer's chainfunc to %s:%s's pushfunc\n",GST_DEBUG_PAD_NAME(pad));
pad->pushfunc = GST_DEBUG_FUNCPTR(pad->peer->chainfunc);
// need to walk through and check for outside connections
//FIXME need to do this for all pads
// get the pad's peer
peer = gst_pad_get_peer (pad);
if (!peer) {
DEBUG("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->num_entries++;
}
}
else {
DEBUG("found pad %s\n", gst_pad_get_name (pad));
}
pads = g_list_next (pads);
}
elements = g_list_next (elements);
}
*/
/*
// If cothreads are needed, we need to not only find elements but
// set up cothread states and various proxy functions.
if (bin->need_cothreads) {
DEBUG("bin is using cothreads\n");
// first create thread context
if (bin->threadcontext == NULL) {
DEBUG("initializing cothread context\n");
bin->threadcontext = cothread_init ();
}
// walk through all the children
elements = bin->managed_elements;
while (elements) {
element = GST_ELEMENT (elements->data);
elements = g_list_next (elements);
// start out with a NULL warpper function, we'll set it if we want a cothread
wrapper_function = NULL;
// have to decide if we need to or can use a cothreads, and if so which wrapper
// first of all, if there's a loopfunc, the decision's already made
if (element->loopfunc != NULL) {
wrapper_function = GST_DEBUG_FUNCPTR(gst_bin_loopfunc_wrapper);
DEBUG("element %s is a loopfunc, must use a cothread\n",gst_element_get_name(element));
} else {
// otherwise we need to decide if it needs a cothread
// if it's complex, or cothreads are preferred and it's *not* decoupled, cothread it
if (GST_FLAG_IS_SET (element,GST_ELEMENT_COMPLEX) ||
(GST_FLAG_IS_SET (bin,GST_BIN_FLAG_PREFER_COTHREADS) &&
!GST_FLAG_IS_SET (element,GST_ELEMENT_DECOUPLED))) {
// base it on whether we're going to loop through source or sink pads
if (element->numsinkpads == 0)
wrapper_function = GST_DEBUG_FUNCPTR(gst_bin_src_wrapper);
else
wrapper_function = GST_DEBUG_FUNCPTR(gst_bin_chain_wrapper);
}
}
// walk through the all the pads for this element, setting proxy functions
// the selection of proxy functions depends on whether we're in a cothread or not
pads = gst_element_get_pad_list (element);
while (pads) {
pad = GST_PAD (pads->data);
pads = g_list_next (pads);
// check to see if someone else gets to set up the element
peer_manager = GST_ELEMENT((pad)->peer->parent)->manager;
if (peer_manager != GST_ELEMENT(bin)) {
DEBUG("WARNING: pad %s:%s is connected outside of bin\n",GST_DEBUG_PAD_NAME(pad));
}
// if the wrapper_function is set, we need to use the proxy functions
if (wrapper_function != NULL) {
// set up proxy functions
if (gst_pad_get_direction (pad) == GST_PAD_SINK) {
DEBUG("setting push proxy for sinkpad %s:%s\n",GST_DEBUG_PAD_NAME(pad));
pad->pushfunc = GST_DEBUG_FUNCPTR(gst_bin_pushfunc_proxy);
} else if (gst_pad_get_direction (pad) == GST_PAD_SRC) {
DEBUG("setting pull proxy for srcpad %s:%s\n",GST_DEBUG_PAD_NAME(pad));
pad->pullfunc = GST_DEBUG_FUNCPTR(gst_bin_pullfunc_proxy);
}
} else {
// otherwise we need to set up for 'traditional' chaining
if (gst_pad_get_direction (pad) == GST_PAD_SINK) {
// we can just copy the chain function, since it shares the prototype
DEBUG("copying chain function into push proxy for %s:%s\n",
GST_DEBUG_PAD_NAME(pad));
pad->pushfunc = pad->chainfunc;
} else if (gst_pad_get_direction (pad) == GST_PAD_SRC) {
// we can just copy the get function, since it shares the prototype
DEBUG("copying get function into pull proxy for %s:%s\n",
GST_DEBUG_PAD_NAME(pad));
pad->pullfunc = pad->getfunc;
}
}
}
// if a loopfunc has been specified, create and set up a cothread
if (wrapper_function != NULL) {
if (element->threadstate == NULL) {
element->threadstate = cothread_create (bin->threadcontext);
DEBUG("created cothread %p (@%p) for \"%s\"\n",element->threadstate,
&element->threadstate,gst_element_get_name(element));
}
cothread_setfunc (element->threadstate, wrapper_function, 0, (char **)element);
DEBUG("set wrapper function for \"%s\" to &%s\n",gst_element_get_name(element),
GST_DEBUG_FUNCPTR_NAME(wrapper_function));
}
// // HACK: if the element isn't decoupled, it's an entry
// if (!GST_FLAG_IS_SET(element,GST_ELEMENT_DECOUPLED))
// bin->entries = g_list_append(bin->entries, element);
}
// otherwise, cothreads are not needed
} else {
DEBUG("bin is chained, no cothreads needed\n");
elements = bin->managed_elements;
while (elements) {
element = GST_ELEMENT (elements->data);
elements = g_list_next (elements);
pads = gst_element_get_pad_list (element);
while (pads) {
pad = GST_PAD (pads->data);
pads = g_list_next (pads);
if (gst_pad_get_direction (pad) == GST_PAD_SINK) {
DEBUG("copying chain function into push proxy for %s:%s\n",GST_DEBUG_PAD_NAME(pad));
pad->pushfunc = pad->chainfunc;
} else {
DEBUG("copying get function into pull proxy for %s:%s\n",GST_DEBUG_PAD_NAME(pad));
pad->pullfunc = pad->getfunc;
}
}
}
}
*/

38
gst/gstscheduler.h Normal file
View file

@ -0,0 +1,38 @@
/* 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.
*/
#ifndef __GST_SCHEDULER_H__
#define __GST_SCHEDULER_H__
#include <gst/gstbin.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
void gst_bin_schedule_func(GstBin *bin);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __GST_SCHEDULER_H__ */

2
gst/gstthread.c
View file

@ -116,6 +116,8 @@ gst_thread_class_init (GstThreadClass *klass)
static void
gst_thread_init (GstThread *thread)
{
DEBUG("initializing thread '%s'\n",gst_element_get_name(GST_ELEMENT(thread)));
// we're a manager by default
GST_FLAG_SET (thread, GST_BIN_FLAG_MANAGER);

1
plugins/elements/gstidentity.c
View file

@ -134,6 +134,7 @@ gst_identity_loop (GstElement *element)
do {
buf = gst_pad_pull (identity->sinkpad);
g_print("(%s:%s)i ",GST_DEBUG_PAD_NAME(identity->sinkpad));
gst_pad_push (identity->srcpad, buf);

19
plugins/elements/gstqueue.c
View file

@ -49,6 +49,7 @@ enum {
ARG_0,
ARG_LEVEL,
ARG_MAX_LEVEL,
ARG_BLOCK,
};
@ -106,6 +107,8 @@ gst_queue_class_init (GstQueueClass *klass)
GTK_ARG_READABLE, ARG_LEVEL);
gtk_object_add_arg_type ("GstQueue::max_level", GTK_TYPE_INT,
GTK_ARG_READWRITE, ARG_MAX_LEVEL);
gtk_object_add_arg_type ("GstQueue::block", GTK_TYPE_BOOL,
GTK_ARG_READWRITE, ARG_BLOCK);
gtkobject_class->set_arg = gst_queue_set_arg;
gtkobject_class->get_arg = gst_queue_get_arg;
@ -116,7 +119,8 @@ gst_queue_class_init (GstQueueClass *klass)
static void
gst_queue_init (GstQueue *queue)
{
GST_FLAG_SET (queue, GST_ELEMENT_SCHEDULE_PASSIVELY);
// scheduling on this kind of element is, well, interesting
GST_FLAG_SET (queue, GST_ELEMENT_DECOUPLED);
queue->sinkpad = gst_pad_new ("sink", GST_PAD_SINK);
gst_pad_set_chain_function (queue->sinkpad, GST_DEBUG_FUNCPTR(gst_queue_chain));
@ -129,6 +133,7 @@ gst_queue_init (GstQueue *queue)
queue->queue = NULL;
queue->level_buffers = 0;
queue->max_buffers = 20;
queue->block = TRUE;
queue->level_bytes = 0;
queue->size_buffers = 0;
queue->size_bytes = 0;
@ -237,6 +242,12 @@ gst_queue_get (GstPad *pad)
DEBUG("queue: %s push %d %ld %p\n", name, queue->level_buffers, pthread_self (), queue->emptycond);
DEBUG("queue: %s have queue lock\n", name);
// we bail if there's nothing there
if (!queue->level_buffers && !queue->block) {
GST_UNLOCK(queue);
return NULL;
}
while (!queue->level_buffers) {
STATUS("queue: %s U released lock\n");
GST_UNLOCK (queue);
@ -312,6 +323,9 @@ gst_queue_set_arg (GtkObject *object, GtkArg *arg, guint id)
case ARG_MAX_LEVEL:
queue->max_buffers = GTK_VALUE_INT (*arg);
break;
case ARG_BLOCK:
queue->block = GTK_VALUE_BOOL (*arg);
break;
default:
break;
}
@ -334,6 +348,9 @@ gst_queue_get_arg (GtkObject *object, GtkArg *arg, guint id)
case ARG_MAX_LEVEL:
GTK_VALUE_INT (*arg) = queue->max_buffers;
break;
case ARG_BLOCK:
GTK_VALUE_BOOL (*arg) = queue->block;
break;
default:
arg->type = GTK_TYPE_INVALID;
break;

1
plugins/elements/gstqueue.h
View file

@ -59,6 +59,7 @@ struct _GstQueue {
gint level_buffers; /* number of buffers queued here */
gint max_buffers; /* maximum number of buffers queued here */
gboolean block; /* if set to FALSE, _get returns NULL if queue empty */
gint level_bytes; /* number of bytes queued here */
gint size_buffers; /* size of queue in buffers */
gint size_bytes; /* size of queue in bytes */