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gstreamer/gst/gstscheduler.c
Erik Walthinsen 91afe9cd73 Swapped PAUSED and PLAYING states, reworked thread interlocking. 
Original commit message from CVS:
Swapped PAUSED and PLAYING states, reworked thread interlocking.
States are now: NULL <-> READY <-> PAUSED <-> PLAYING.

Had do update dv1394src, gst_arts, and xmmsinput, please test these out!

Cleaned up DEBUG output in several places to by much much less verbose
but still just as useful (denser).
2001-05-25 17:35:47 +00:00

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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
*
* gstscheduler.c: Default scheduling code for most cases
*
* 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_private.h"
#include "gstscheduler.h"
static int
gst_schedule_loopfunc_wrapper (int argc,char *argv[])
{
GstElement *element = GST_ELEMENT (argv);
G_GNUC_UNUSED const gchar *name = GST_ELEMENT_NAME (element);
GST_DEBUG_ENTER("(%d,'%s')",argc,name);
do {
GST_DEBUG (GST_CAT_DATAFLOW,"calling loopfunc %s for element %s\n",
GST_DEBUG_FUNCPTR_NAME (element->loopfunc),name);
(element->loopfunc) (element);
GST_DEBUG (GST_CAT_DATAFLOW,"element %s ended loop function\n", name);
} while (!GST_ELEMENT_IS_COTHREAD_STOPPING(element));
GST_FLAG_UNSET(element,GST_ELEMENT_COTHREAD_STOPPING);
GST_DEBUG_LEAVE("(%d,'%s')",argc,name);
return 0;
}
static int
gst_schedule_chain_wrapper (int argc,char *argv[])
{
GstElement *element = GST_ELEMENT (argv);
G_GNUC_UNUSED const gchar *name = GST_ELEMENT_NAME (element);
GList *pads;
GstPad *pad;
GstRealPad *realpad;
GstBuffer *buf;
GST_DEBUG_ENTER("(\"%s\")",name);
GST_DEBUG (GST_CAT_DATAFLOW,"stepping through pads\n");
do {
pads = element->pads;
while (pads) {
pad = GST_PAD (pads->data);
pads = g_list_next (pads);
if (!GST_IS_REAL_PAD(pad)) continue;
realpad = GST_REAL_PAD(pad);
if (GST_RPAD_DIRECTION(realpad) == GST_PAD_SINK) {
GST_DEBUG (GST_CAT_DATAFLOW,"pulling a buffer from %s:%s\n", name, GST_PAD_NAME (pad));
buf = gst_pad_pull (pad);
GST_DEBUG (GST_CAT_DATAFLOW,"calling chain function of %s:%s\n", name, GST_PAD_NAME (pad));
if (buf) GST_RPAD_CHAINFUNC(realpad) (pad,buf);
GST_DEBUG (GST_CAT_DATAFLOW,"calling chain function of %s:%s done\n", name, GST_PAD_NAME (pad));
}
}
} while (!GST_ELEMENT_IS_COTHREAD_STOPPING(element));
GST_FLAG_UNSET(element,GST_ELEMENT_COTHREAD_STOPPING);
GST_DEBUG_LEAVE("(%d,'%s')",argc,name);
return 0;
}
static int
gst_schedule_src_wrapper (int argc,char *argv[])
{
GstElement *element = GST_ELEMENT (argv);
GList *pads;
GstRealPad *realpad;
GstBuffer *buf = NULL;
G_GNUC_UNUSED const gchar *name = GST_ELEMENT_NAME (element);
GST_DEBUG_ENTER("(%d,\"%s\")",argc,name);
do {
pads = element->pads;
while (pads) {
if (!GST_IS_REAL_PAD(pads->data)) continue;
realpad = (GstRealPad*)(pads->data);
pads = g_list_next(pads);
if (GST_RPAD_DIRECTION(realpad) == GST_PAD_SRC) {
GST_DEBUG (GST_CAT_DATAFLOW,"calling _getfunc for %s:%s\n",GST_DEBUG_PAD_NAME(realpad));
if (realpad->regiontype != GST_REGION_NONE) {
g_return_val_if_fail (GST_RPAD_GETREGIONFUNC(realpad) != NULL, 0);
// if (GST_RPAD_GETREGIONFUNC(realpad) == NULL)
// fprintf(stderr,"error, no getregionfunc in \"%s\"\n", name);
// else
buf = (GST_RPAD_GETREGIONFUNC(realpad))((GstPad*)realpad,realpad->regiontype,realpad->offset,realpad->len);
realpad->regiontype = GST_REGION_NONE;
} else {
g_return_val_if_fail (GST_RPAD_GETFUNC(realpad) != NULL, 0);
// if (GST_RPAD_GETFUNC(realpad) == NULL)
// fprintf(stderr,"error, no getfunc in \"%s\"\n", name);
// else
buf = GST_RPAD_GETFUNC(realpad) ((GstPad*)realpad);
}
GST_DEBUG (GST_CAT_DATAFLOW,"calling gst_pad_push on pad %s:%s\n",GST_DEBUG_PAD_NAME(realpad));
if (buf) gst_pad_push ((GstPad*)realpad, buf);
}
}
} while (!GST_ELEMENT_IS_COTHREAD_STOPPING(element));
GST_FLAG_UNSET(element,GST_ELEMENT_COTHREAD_STOPPING);
GST_DEBUG_LEAVE("");
return 0;
}
static void
gst_schedule_pushfunc_proxy (GstPad *pad, GstBuffer *buf)
{
GstRealPad *peer = GST_RPAD_PEER(pad);
GST_DEBUG_ENTER("(%s:%s)",GST_DEBUG_PAD_NAME(pad));
GST_DEBUG (GST_CAT_DATAFLOW,"putting buffer %p in peer's pen\n",buf);
// FIXME this should be bounded
// loop until the bufferpen is empty so we can fill it up again
while (GST_RPAD_BUFPEN(pad) != NULL) {
GST_DEBUG (GST_CAT_DATAFLOW, "switching to %p to empty bufpen\n",
GST_ELEMENT (GST_PAD_PARENT (pad))->threadstate);
cothread_switch (GST_ELEMENT (GST_PAD_PARENT (pad))->threadstate);
// we may no longer be the same pad, check.
if (GST_RPAD_PEER(peer) != (GstRealPad *)pad) {
GST_DEBUG (GST_CAT_DATAFLOW, "new pad in mid-switch!\n");
pad = (GstPad *)GST_RPAD_PEER(peer);
}
}
// now fill the bufferpen and switch so it can be consumed
GST_RPAD_BUFPEN(GST_RPAD_PEER(pad)) = buf;
GST_DEBUG (GST_CAT_DATAFLOW,"switching to %p\n",GST_ELEMENT (GST_PAD_PARENT (pad))->threadstate);
cothread_switch (GST_ELEMENT (GST_PAD_PARENT (pad))->threadstate);
GST_DEBUG (GST_CAT_DATAFLOW,"done switching\n");
}
static GstBuffer*
gst_schedule_pullfunc_proxy (GstPad *pad)
{
GstBuffer *buf;
GstRealPad *peer = GST_RPAD_PEER(pad);
GST_DEBUG_ENTER("(%s:%s)",GST_DEBUG_PAD_NAME(pad));
// FIXME this should be bounded
// we will loop switching to the peer until it's filled up the bufferpen
while (GST_RPAD_BUFPEN(pad) == NULL) {
GST_DEBUG (GST_CAT_DATAFLOW, "switching to \"%s\": %p to fill bufpen\n",
GST_ELEMENT_NAME(GST_ELEMENT(GST_PAD_PARENT(pad))),
GST_ELEMENT(GST_PAD_PARENT(pad))->threadstate);
cothread_switch (GST_ELEMENT(GST_PAD_PARENT(pad))->threadstate);
// we may no longer be the same pad, check.
if (GST_RPAD_PEER(peer) != (GstRealPad *)pad) {
GST_DEBUG (GST_CAT_DATAFLOW, "new pad in mid-switch!\n");
pad = (GstPad *)GST_RPAD_PEER(peer);
}
}
GST_DEBUG (GST_CAT_DATAFLOW,"done switching\n");
// now grab the buffer from the pen, clear the pen, and return the buffer
buf = GST_RPAD_BUFPEN(pad);
GST_RPAD_BUFPEN(pad) = NULL;
return buf;
}
static GstBuffer*
gst_schedule_pullregionfunc_proxy (GstPad *pad,GstRegionType type,guint64 offset,guint64 len)
{
GstBuffer *buf;
GstRealPad *peer = GST_RPAD_PEER(pad);
GST_DEBUG_ENTER("%s:%s,%d,%lld,%lld",GST_DEBUG_PAD_NAME(pad),type,offset,len);
// put the region info into the pad
GST_RPAD_REGIONTYPE(pad) = type;
GST_RPAD_OFFSET(pad) = offset;
GST_RPAD_LEN(pad) = len;
// FIXME this should be bounded
// we will loop switching to the peer until it's filled up the bufferpen
while (GST_RPAD_BUFPEN(pad) == NULL) {
GST_DEBUG (GST_CAT_DATAFLOW, "switching to %p to fill bufpen\n",
GST_ELEMENT(GST_PAD_PARENT(pad))->threadstate);
cothread_switch (GST_ELEMENT(GST_PAD_PARENT(pad))->threadstate);
// we may no longer be the same pad, check.
if (GST_RPAD_PEER(peer) != (GstRealPad *)pad) {
GST_DEBUG (GST_CAT_DATAFLOW, "new pad in mid-switch!\n");
pad = (GstPad *)GST_RPAD_PEER(peer);
}
}
GST_DEBUG (GST_CAT_DATAFLOW,"done switching\n");
// now grab the buffer from the pen, clear the pen, and return the buffer
buf = GST_RPAD_BUFPEN(pad);
GST_RPAD_BUFPEN(pad) = NULL;
return buf;
}
static void
gst_schedule_cothreaded_chain (GstBin *bin, GstScheduleChain *chain) {
GList *elements;
GstElement *element;
cothread_func wrapper_function;
GList *pads;
GstPad *pad;
GST_DEBUG (GST_CAT_SCHEDULING,"chain is using COTHREADS\n");
// first create thread context
if (bin->threadcontext == NULL) {
GST_DEBUG (GST_CAT_SCHEDULING,"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_schedule_loopfunc_wrapper);
GST_DEBUG (GST_CAT_SCHEDULING,"element '%s' is a loop-based\n",GST_ELEMENT_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_schedule_src_wrapper);
GST_DEBUG (GST_CAT_SCHEDULING,"element '%s' is a source, using _src_wrapper\n",GST_ELEMENT_NAME(element));
} else {
wrapper_function = GST_DEBUG_FUNCPTR(gst_schedule_chain_wrapper);
GST_DEBUG (GST_CAT_SCHEDULING,"element '%s' is a filter, using _chain_wrapper\n",GST_ELEMENT_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 (!GST_IS_REAL_PAD(pad)) continue;
// if the element is DECOUPLED or outside the manager, we have to chain
if ((wrapper_function == NULL) ||
(GST_RPAD_PEER(pad) &&
(GST_ELEMENT (GST_PAD_PARENT (GST_PAD (GST_RPAD_PEER (pad))))->sched != chain->sched))
) {
// set the chain proxies
if (GST_RPAD_DIRECTION(pad) == GST_PAD_SINK) {
GST_DEBUG (GST_CAT_SCHEDULING,"copying chain function into push proxy for %s:%s\n",GST_DEBUG_PAD_NAME(pad));
GST_RPAD_PUSHFUNC(pad) = GST_RPAD_CHAINFUNC(pad);
} else {
GST_DEBUG (GST_CAT_SCHEDULING,"copying get function into pull proxy for %s:%s\n",GST_DEBUG_PAD_NAME(pad));
GST_RPAD_PULLFUNC(pad) = GST_RPAD_GETFUNC(pad);
GST_RPAD_PULLREGIONFUNC(pad) = GST_RPAD_GETREGIONFUNC(pad);
}
// otherwise we really are a cothread
} else {
if (gst_pad_get_direction (pad) == GST_PAD_SINK) {
GST_DEBUG (GST_CAT_SCHEDULING,"setting cothreaded push proxy for sinkpad %s:%s\n",GST_DEBUG_PAD_NAME(pad));
GST_RPAD_PUSHFUNC(pad) = GST_DEBUG_FUNCPTR(gst_schedule_pushfunc_proxy);
} else {
GST_DEBUG (GST_CAT_SCHEDULING,"setting cothreaded pull proxy for srcpad %s:%s\n",GST_DEBUG_PAD_NAME(pad));
GST_RPAD_PULLFUNC(pad) = GST_DEBUG_FUNCPTR(gst_schedule_pullfunc_proxy);
GST_RPAD_PULLREGIONFUNC(pad) = GST_DEBUG_FUNCPTR(gst_schedule_pullregionfunc_proxy);
}
}
}
// need to set up the cothread now
if (wrapper_function != NULL) {
if (element->threadstate == NULL) {
// FIXME handle cothread_create returning NULL
element->threadstate = cothread_create (bin->threadcontext);
GST_DEBUG (GST_CAT_SCHEDULING,"created cothread %p for '%s'\n",element->threadstate,GST_ELEMENT_NAME(element));
}
cothread_setfunc (element->threadstate, wrapper_function, 0, (char **)element);
GST_DEBUG (GST_CAT_SCHEDULING,"set wrapper function for '%s' to &%s\n",GST_ELEMENT_NAME(element),
GST_DEBUG_FUNCPTR_NAME(wrapper_function));
}
}
}
static void
gst_schedule_chained_chain (GstBin *bin, _GstBinChain *chain) {
GList *elements;
GstElement *element;
GList *pads;
GstPad *pad;
GST_DEBUG (GST_CAT_SCHEDULING,"chain entered\n");
// walk through all the elements
elements = chain->elements;
while (elements) {
element = GST_ELEMENT (elements->data);
elements = g_list_next (elements);
// walk through all the pads
pads = gst_element_get_pad_list (element);
while (pads) {
pad = GST_PAD (pads->data);
pads = g_list_next (pads);
if (!GST_IS_REAL_PAD(pad)) continue;
if (GST_RPAD_DIRECTION(pad) == GST_PAD_SINK) {
GST_DEBUG (GST_CAT_SCHEDULING,"copying chain function into push proxy for %s:%s\n",GST_DEBUG_PAD_NAME(pad));
GST_RPAD_PUSHFUNC(pad) = GST_RPAD_CHAINFUNC(pad);
} else {
GST_DEBUG (GST_CAT_SCHEDULING,"copying get function into pull proxy for %s:%s\n",GST_DEBUG_PAD_NAME(pad));
GST_RPAD_PULLFUNC(pad) = GST_RPAD_GETFUNC(pad);
GST_RPAD_PULLREGIONFUNC(pad) = GST_RPAD_GETREGIONFUNC(pad);
}
}
}
}
/* depracated!! */
static void
gst_bin_schedule_cleanup (GstBin *bin)
{
GList *chains;
_GstBinChain *chain;
chains = bin->chains;
while (chains) {
chain = (_GstBinChain *)(chains->data);
chains = g_list_next(chains);
// g_list_free(chain->disabled);
g_list_free(chain->elements);
g_list_free(chain->entries);
g_free(chain);
}
g_list_free(bin->chains);
bin->chains = NULL;
}
static void
gst_scheduler_handle_eos (GstElement *element, _GstBinChain *chain)
{
GST_DEBUG (GST_CAT_SCHEDULING,"chain removed from scheduler, EOS from element \"%s\"\n", GST_ELEMENT_NAME (element));
chain->need_scheduling = FALSE;
}
/*
void gst_bin_schedule_func(GstBin *bin) {
GList *elements;
GstElement *element;
GSList *pending = NULL;
GList *pads;
GstPad *pad;
GstElement *peerparent;
GList *chains;
GstScheduleChain *chain;
GST_DEBUG_ENTER("(\"%s\")",GST_ELEMENT_NAME (GST_ELEMENT (bin)));
gst_bin_schedule_cleanup(bin);
// next we have to find all the separate scheduling chains
GST_DEBUG (GST_CAT_SCHEDULING,"attempting 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
GST_DEBUG (GST_CAT_SCHEDULING,"skipping '%s' because it's decoupled\n",GST_ELEMENT_NAME(element));
elements = g_list_next (elements);
continue;
}
GST_DEBUG (GST_CAT_SCHEDULING,"starting with element '%s'\n",GST_ELEMENT_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);
chain->need_scheduling = TRUE;
// 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
GST_DEBUG (GST_CAT_SCHEDULING,"adding '%s' to chain\n",GST_ELEMENT_NAME(element));
chain->elements = g_list_prepend (chain->elements, element);
chain->num_elements++;
gtk_signal_connect (GTK_OBJECT (element), "eos", gst_scheduler_handle_eos, chain);
// set the cothreads flag as appropriate
if (GST_FLAG_IS_SET (element, GST_ELEMENT_USE_COTHREAD))
chain->need_cothreads = TRUE;
if (bin->use_cothreads == TRUE)
chain->need_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
// GST_DEBUG (GST_CAT_SCHEDULING,"removing '%s' from list of possible elements\n",GST_ELEMENT_NAME(element));
elements = g_list_remove (elements, element);
// if this element is a source, add it as an entry
if (element->numsinkpads == 0) {
chain->entries = g_list_prepend (chain->entries, element);
GST_DEBUG (GST_CAT_SCHEDULING,"added '%s' as SRC entry into the chain\n",GST_ELEMENT_NAME(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);
if (!GST_IS_REAL_PAD(pad)) continue;
GST_DEBUG (GST_CAT_SCHEDULING,"have pad %s:%s\n",GST_DEBUG_PAD_NAME(pad));
if (GST_RPAD_PEER(pad) == NULL) continue;
if (GST_RPAD_PEER(pad) == NULL) GST_ERROR(pad,"peer is null!");
g_assert(GST_RPAD_PEER(pad) != NULL);
g_assert(GST_PAD_PARENT (GST_PAD(GST_RPAD_PEER(pad))) != NULL);
peerparent = GST_ELEMENT(GST_PAD_PARENT (GST_PAD(GST_RPAD_PEER(pad))));
GST_DEBUG (GST_CAT_SCHEDULING,"peer pad %p\n", GST_RPAD_PEER(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, peerparent) != NULL) ||
GST_FLAG_IS_SET (peerparent, GST_ELEMENT_DECOUPLED)) {
// add the peer element to the pending list
GST_DEBUG (GST_CAT_SCHEDULING,"adding '%s' to list of pending elements\n",
GST_ELEMENT_NAME(peerparent));
pending = g_slist_prepend (pending, peerparent);
// if this is a sink pad, then the element on the other side is an entry
if ((GST_RPAD_DIRECTION(pad) == GST_PAD_SINK) &&
(GST_FLAG_IS_SET (peerparent, GST_ELEMENT_DECOUPLED))) {
chain->entries = g_list_prepend (chain->entries, peerparent);
gtk_signal_connect (GTK_OBJECT (peerparent), "eos", gst_scheduler_handle_eos, chain);
GST_DEBUG (GST_CAT_SCHEDULING,"added '%s' as DECOUPLED entry into the chain\n",GST_ELEMENT_NAME(peerparent));
}
} else
GST_DEBUG (GST_CAT_SCHEDULING,"element '%s' has already been dealt with\n",GST_ELEMENT_NAME(peerparent));
}
}
} while (pending);
// add the chain to the bin
GST_DEBUG (GST_CAT_SCHEDULING,"have chain with %d elements: ",chain->num_elements);
{ GList *elements = chain->elements;
while (elements) {
element = GST_ELEMENT (elements->data);
elements = g_list_next(elements);
GST_DEBUG_NOPREFIX(GST_CAT_SCHEDULING,"%s, ",GST_ELEMENT_NAME(element));
}
}
GST_DEBUG_NOPREFIX(GST_CAT_DATAFLOW,"\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);
GST_DEBUG (GST_CAT_SCHEDULING,"\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 = (GstScheduleChain *)(chains->data);
chains = g_list_next (chains);
// schedule as appropriate
if (chain->need_cothreads) {
gst_schedule_cothreaded_chain (bin,chain);
} else {
gst_schedule_chained_chain (bin,chain);
}
}
GST_DEBUG_LEAVE("(\"%s\")",GST_ELEMENT_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) {
GST_DEBUG (0,"dealing with outside source element %s\n",GST_ELEMENT_NAME(outside));
// GST_DEBUG (0,"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;
// GST_DEBUG (0,"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);
GST_RPAD_PULLFUNC(pad) = GST_DEBUG_FUNCPTR(gst_bin_pullfunc_proxy);
GST_RPAD_PULLREGIONFUNC(pad) = GST_DEBUG_FUNCPTR(gst_bin_pullregionfunc_proxy);
}
} else {
*/
/*
} else if (GST_IS_SRC (element)) {
GST_DEBUG (0,"adding '%s' as entry point, because it's a source\n",GST_ELEMENT_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) {
GST_DEBUG (0,"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);
GST_DEBUG (0,"pushfunc %p = gst_bin_pushfunc_proxy %p\n",&pad->pushfunc,gst_bin_pushfunc_proxy);
} else if (gst_pad_get_direction (pad) == GST_PAD_SRC) {
GST_DEBUG (0,"setting pull proxies for srcpad %s:%s\n",GST_DEBUG_PAD_NAME(pad));
// set the proxy functions
GST_RPAD_PULLFUNC(pad) = GST_DEBUG_FUNCPTR(gst_bin_pullfunc_proxy);
GST_RPAD_PULLREGIONFUNC(pad) = GST_DEBUG_FUNCPTR(gst_bin_pullregionfunc_proxy);
GST_DEBUG (0,"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 {
GST_DEBUG (0,"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);
GST_DEBUG (0,"found element \"%s\"\n", GST_ELEMENT_NAME (element));
if (GST_IS_BIN (element)) {
gst_bin_create_plan (GST_BIN (element));
}
if (GST_IS_SRC (element)) {
GST_DEBUG (0,"adding '%s' as entry point, because it's a source\n",GST_ELEMENT_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) {
GST_DEBUG (0,"found SINK pad %s:%s\n", GST_DEBUG_PAD_NAME(pad));
// copy the peer's chain function, easy enough
GST_DEBUG (0,"copying peer's chainfunc to %s:%s's pushfunc\n",GST_DEBUG_PAD_NAME(pad));
GST_RPAD_PUSHFUNC(pad) = GST_DEBUG_FUNCPTR(GST_RPAD_CHAINFUNC(GST_RPAD_PEER(pad)));
// need to walk through and check for outside connections
//FIXME need to do this for all pads
// get the pad's peer
peer = GST_RPAD_PEER(pad);
if (!peer) {
GST_DEBUG (0,"found SINK pad %s has no peer\n", GST_ELEMENT_NAME (pad));
break;
}
// get the parent of the peer of the pad
outside = GST_ELEMENT (GST_RPAD_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_NAME (GST_ELEMENT (outside)),
GST_ELEMENT_NAME (GST_ELEMENT (element)));
bin->entries = g_list_prepend (bin->entries, outside);
bin->num_entries++;
}
}
else {
GST_DEBUG (0,"found pad %s\n", GST_ELEMENT_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) {
GST_DEBUG (0,"bin is using cothreads\n");
// first create thread context
if (bin->threadcontext == NULL) {
GST_DEBUG (0,"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);
GST_DEBUG (0,"element %s is a loopfunc, must use a cothread\n",GST_ELEMENT_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)) {
GST_DEBUG (0,"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) {
GST_DEBUG (0,"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) {
GST_DEBUG (0,"setting pull proxy for srcpad %s:%s\n",GST_DEBUG_PAD_NAME(pad));
GST_RPAD_PULLFUNC(pad) = GST_DEBUG_FUNCPTR(gst_bin_pullfunc_proxy);
GST_RPAD_PULLREGIONFUNC(pad) = GST_DEBUG_FUNCPTR(gst_bin_pullregionfunc_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
GST_DEBUG (0,"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
GST_DEBUG (0,"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);
GST_DEBUG (0,"created cothread %p (@%p) for \"%s\"\n",element->threadstate,
&element->threadstate,GST_ELEMENT_NAME (element));
}
cothread_setfunc (element->threadstate, wrapper_function, 0, (char **)element);
GST_DEBUG (0,"set wrapper function for \"%s\" to &%s\n",GST_ELEMENT_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 {
GST_DEBUG (0,"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) {
GST_DEBUG (0,"copying chain function into push proxy for %s:%s\n",GST_DEBUG_PAD_NAME(pad));
pad->pushfunc = pad->chainfunc;
} else {
GST_DEBUG (0,"copying get function into pull proxy for %s:%s\n",GST_DEBUG_PAD_NAME(pad));
pad->pullfunc = pad->getfunc;
}
}
}
}
*/
static void
gst_schedule_lock_element (GstSchedule *sched,GstElement *element)
{
cothread_lock(element->threadstate);
}
static void
gst_schedule_unlock_element (GstSchedule *sched,GstElement *element)
{
cothread_unlock(element->threadstate);
}
/*************** INCREMENTAL SCHEDULING CODE STARTS HERE ***************/
static void gst_schedule_class_init (GstScheduleClass *klass);
static void gst_schedule_init (GstSchedule *schedule);
static GstObjectClass *parent_class = NULL;
GtkType gst_schedule_get_type(void) {
static GtkType schedule_type = 0;
if (!schedule_type) {
static const GtkTypeInfo schedule_info = {
"GstSchedule",
sizeof(GstSchedule),
sizeof(GstScheduleClass),
(GtkClassInitFunc)gst_schedule_class_init,
(GtkObjectInitFunc)gst_schedule_init,
(GtkArgSetFunc)NULL,
(GtkArgGetFunc)NULL,
(GtkClassInitFunc)NULL,
};
schedule_type = gtk_type_unique(GST_TYPE_OBJECT,&schedule_info);
}
return schedule_type;
}
static void
gst_schedule_class_init (GstScheduleClass *klass)
{
parent_class = gtk_type_class(GST_TYPE_OBJECT);
}
static void
gst_schedule_init (GstSchedule *schedule)
{
schedule->add_element = GST_DEBUG_FUNCPTR(gst_schedule_add_element);
schedule->remove_element = GST_DEBUG_FUNCPTR(gst_schedule_remove_element);
schedule->enable_element = GST_DEBUG_FUNCPTR(gst_schedule_enable_element);
schedule->disable_element = GST_DEBUG_FUNCPTR(gst_schedule_disable_element);
schedule->lock_element = GST_DEBUG_FUNCPTR(gst_schedule_lock_element);
schedule->unlock_element = GST_DEBUG_FUNCPTR(gst_schedule_unlock_element);
schedule->pad_connect = GST_DEBUG_FUNCPTR(gst_schedule_pad_connect);
schedule->pad_disconnect = GST_DEBUG_FUNCPTR(gst_schedule_pad_disconnect);
schedule->iterate = GST_DEBUG_FUNCPTR(gst_schedule_iterate);
}
GstSchedule*
gst_schedule_new(GstElement *parent)
{
GstSchedule *sched = GST_SCHEDULE (gtk_type_new (GST_TYPE_SCHEDULE));
sched->parent = parent;
return sched;
}
/* this function will look at a pad and determine if the peer parent is
* a possible candidate for connecting up in the same chain. */
/* DEPRACATED !!!!
GstElement *gst_schedule_check_pad (GstSchedule *sched, GstPad *pad) {
GstRealPad *peer;
GstElement *element, *peerelement;
GST_INFO (GST_CAT_SCHEDULING, "checking pad %s:%s for peer in scheduler",
GST_DEBUG_PAD_NAME(pad));
element = GST_ELEMENT(GST_PAD_PARENT(peer));
GST_DEBUG(GST_CAT_SCHEDULING, "element is \"%s\"\n",GST_ELEMENT_NAME(element));
peer = GST_PAD_PEER (pad);
if (peer == NULL) return NULL;
peerelement = GST_ELEMENT(GST_PAD_PARENT (peer));
if (peerelement == NULL) return NULL;
GST_DEBUG(GST_CAT_SCHEDULING, "peer element is \"%s\"\n",GST_ELEMENT_NAME(peerelement));
// now check to see if it's in the same schedule
if (GST_ELEMENT_SCHED(element) == GST_ELEMENT_SCHED(peerelement)) {
GST_DEBUG(GST_CAT_SCHEDULING, "peer is in same schedule\n");
return peerelement;
}
// otherwise it's not a candidate
return NULL;
}
*/
GstScheduleChain *
gst_schedule_chain_new (GstSchedule *sched)
{
GstScheduleChain *chain = g_new (GstScheduleChain, 1);
// initialize the chain with sane values
chain->sched = sched;
chain->disabled = NULL;
chain->elements = NULL;
chain->num_elements = 0;
chain->entry = NULL;
chain->cothreaded_elements = 0;
chain->schedule = FALSE;
// add the chain to the schedules' list of chains
sched->chains = g_list_prepend (sched->chains, chain);
sched->num_chains++;
GST_INFO (GST_CAT_SCHEDULING, "created new chain %p, now are %d chains in sched %p",
chain,sched->num_chains,sched);
return chain;
}
void
gst_schedule_chain_destroy (GstScheduleChain *chain)
{
GstSchedule *sched = chain->sched;
// remove the chain from the schedules' list of chains
chain->sched->chains = g_list_remove (chain->sched->chains, chain);
chain->sched->num_chains--;
// destroy the chain
g_list_free (chain->disabled); // should be empty...
g_list_free (chain->elements); // ditto
g_free (chain);
GST_INFO (GST_CAT_SCHEDULING, "destroyed chain %p, now are %d chains in sched %p",chain,sched->num_chains,sched);
}
void
gst_schedule_chain_add_element (GstScheduleChain *chain, GstElement *element)
{
GST_INFO (GST_CAT_SCHEDULING, "adding element \"%s\" to chain %p", GST_ELEMENT_NAME (element),chain);
// set the sched pointer for the element
element->sched = chain->sched;
// add the element to the list of 'disabled' elements
chain->disabled = g_list_prepend (chain->disabled, element);
chain->num_elements++;
}
void
gst_schedule_chain_enable_element (GstScheduleChain *chain, GstElement *element)
{
GST_INFO (GST_CAT_SCHEDULING, "enabling element \"%s\" in chain %p", GST_ELEMENT_NAME (element),chain);
// remove from disabled list
chain->disabled = g_list_remove (chain->disabled, element);
// add to elements list
chain->elements = g_list_prepend (chain->elements, element);
// reschedule the chain
gst_schedule_cothreaded_chain(GST_BIN(chain->sched->parent),chain);
}
void
gst_schedule_chain_disable_element (GstScheduleChain *chain, GstElement *element)
{
GST_INFO (GST_CAT_SCHEDULING, "disabling element \"%s\" in chain %p", GST_ELEMENT_NAME (element),chain);
// remove from elements list
chain->elements = g_list_remove (chain->elements, element);
// add to disabled list
chain->disabled = g_list_prepend (chain->disabled, element);
// reschedule the chain
// FIXME this should be done only if manager state != NULL
// gst_schedule_cothreaded_chain(GST_BIN(chain->sched->parent),chain);
}
void
gst_schedule_chain_remove_element (GstScheduleChain *chain, GstElement *element)
{
GST_INFO (GST_CAT_SCHEDULING, "removing element \"%s\" from chain %p", GST_ELEMENT_NAME (element),chain);
// if it's active, deactivate it
if (g_list_find (chain->elements, element)) {
gst_schedule_chain_disable_element (chain, element);
}
// remove the element from the list of elements
chain->disabled = g_list_remove (chain->disabled, element);
chain->num_elements--;
// if there are no more elements in the chain, destroy the chain
if (chain->num_elements == 0)
gst_schedule_chain_destroy(chain);
// unset the sched pointer for the element
element->sched = NULL;
}
void
gst_schedule_chain_elements (GstSchedule *sched, GstElement *element1, GstElement *element2)
{
GList *chains;
GstScheduleChain *chain;
GstScheduleChain *chain1 = NULL, *chain2 = NULL;
GstElement *element;
// first find the chains that hold the two
chains = sched->chains;
while (chains) {
chain = (GstScheduleChain *)(chains->data);
chains = g_list_next(chains);
if (g_list_find (chain->disabled,element1))
chain1 = chain;
else if (g_list_find (chain->elements,element1))
chain1 = chain;
if (g_list_find (chain->disabled,element2))
chain2 = chain;
else if (g_list_find (chain->elements,element2))
chain2 = chain;
}
// first check to see if they're in the same chain, we're done if that's the case
if ((chain1 != NULL) && (chain1 == chain2)) {
GST_INFO (GST_CAT_SCHEDULING, "elements are already in the same chain");
return;
}
// now, if neither element has a chain, create one
if ((chain1 == NULL) && (chain2 == NULL)) {
GST_INFO (GST_CAT_SCHEDULING, "creating new chain to hold two new elements");
chain = gst_schedule_chain_new (sched);
gst_schedule_chain_add_element (chain, element1);
gst_schedule_chain_add_element (chain, element2);
// FIXME chain changed here
// gst_schedule_cothreaded_chain(chain->sched->parent,chain);
// otherwise if both have chains already, join them
} else if ((chain1 != NULL) && (chain2 != NULL)) {
GST_INFO (GST_CAT_SCHEDULING, "merging chain %p into chain %p",chain2,chain1);
// take the contents of chain2 and merge them into chain1
chain1->disabled = g_list_concat (chain1->disabled, g_list_copy(chain2->disabled));
chain1->elements = g_list_concat (chain1->elements, g_list_copy(chain2->elements));
chain1->num_elements += chain2->num_elements;
// FIXME chain changed here
// gst_schedule_cothreaded_chain(chain->sched->parent,chain);
gst_schedule_chain_destroy(chain2);
// otherwise one has a chain already, the other doesn't
} else {
// pick out which one has the chain, and which doesn't
if (chain1 != NULL) chain = chain1, element = element2;
else chain = chain2, element = element1;
GST_INFO (GST_CAT_SCHEDULING, "adding element to existing chain");
gst_schedule_chain_add_element (chain, element);
// FIXME chain changed here
// gst_schedule_cothreaded_chain(chain->sched->parent,chain);
}
}
void
gst_schedule_pad_connect (GstSchedule *sched, GstPad *srcpad, GstPad *sinkpad)
{
GstElement *srcelement,*sinkelement;
srcelement = GST_PAD_PARENT(srcpad);
g_return_if_fail(srcelement != NULL);
sinkelement = GST_PAD_PARENT(sinkpad);
g_return_if_fail(sinkelement != NULL);
GST_INFO (GST_CAT_SCHEDULING, "have pad connected callback on %s:%s to %s:%s",GST_DEBUG_PAD_NAME(srcpad),GST_DEBUG_PAD_NAME(sinkpad));
GST_DEBUG(GST_CAT_SCHEDULING, "srcpad sched is %p, sinkpad sched is %p\n",
GST_ELEMENT_SCHED(srcelement),GST_ELEMENT_SCHED(sinkelement));
if (GST_ELEMENT_SCHED(srcelement) == GST_ELEMENT_SCHED(sinkelement)) {
GST_INFO (GST_CAT_SCHEDULING, "peer %s:%s is in same schedule, chaining together",GST_DEBUG_PAD_NAME(sinkpad));
gst_schedule_chain_elements (sched, srcelement, sinkelement);
}
}
// find the chain within the schedule that holds the element, if any
GstScheduleChain *
gst_schedule_find_chain (GstSchedule *sched, GstElement *element)
{
GList *chains;
GstScheduleChain *chain;
GST_INFO (GST_CAT_SCHEDULING, "searching for element \"%s\" in chains",GST_ELEMENT_NAME(element));
chains = sched->chains;
while (chains) {
chain = (GstScheduleChain *)(chains->data);
chains = g_list_next (chains);
if (g_list_find (chain->elements, element))
return chain;
if (g_list_find (chain->disabled, element))
return chain;
}
return NULL;
}
void
gst_schedule_chain_recursive_add (GstScheduleChain *chain, GstElement *element)
{
GList *pads;
GstPad *pad;
GstElement *peerelement;
// add the element to the chain
gst_schedule_chain_add_element (chain, element);
GST_DEBUG(GST_CAT_SCHEDULING, "recursing on element \"%s\"\n",GST_ELEMENT_NAME(element));
// now go through all the pads and see which peers can be added
pads = element->pads;
while (pads) {
pad = GST_PAD(pads->data);
pads = g_list_next (pads);
GST_DEBUG(GST_CAT_SCHEDULING, "have pad %s:%s, checking for valid peer\n",GST_DEBUG_PAD_NAME(pad));
// if the peer exists and could be in the same chain
if (GST_PAD_PEER(pad)) {
GST_DEBUG(GST_CAT_SCHEDULING, "has peer %s:%s\n",GST_DEBUG_PAD_NAME(GST_PAD_PEER(pad)));
peerelement = GST_PAD_PARENT(GST_PAD_PEER(pad));
if (GST_ELEMENT_SCHED(GST_PAD_PARENT(pad)) == GST_ELEMENT_SCHED(peerelement)) {
GST_DEBUG(GST_CAT_SCHEDULING, "peer \"%s\" is valid for same chain\n",GST_ELEMENT_NAME(peerelement));
// if it's not already in a chain, add it to this one
if (gst_schedule_find_chain (chain->sched, peerelement) == NULL) {
gst_schedule_chain_recursive_add (chain, peerelement);
}
}
}
}
}
void
gst_schedule_pad_disconnect (GstSchedule *sched, GstPad *srcpad, GstPad *sinkpad)
{
GstScheduleChain *chain;
GstElement *element1, *element2;
GstScheduleChain *chain1, *chain2;
GST_INFO (GST_CAT_SCHEDULING, "disconnecting pads %s:%s and %s:%s",
GST_DEBUG_PAD_NAME(srcpad), GST_DEBUG_PAD_NAME(sinkpad));
// we need to have the parent elements of each pad
element1 = GST_ELEMENT(GST_PAD_PARENT(srcpad));
element2 = GST_ELEMENT(GST_PAD_PARENT(sinkpad));
// first task is to remove the old chain they belonged to.
// this can be accomplished by taking either of the elements,
// since they are guaranteed to be in the same chain
// FIXME is it potentially better to make an attempt at splitting cleaner??
chain = gst_schedule_find_chain (sched, element1);
if (chain) {
GST_INFO (GST_CAT_SCHEDULING, "destroying chain");
gst_schedule_chain_destroy (chain);
}
// now create a new chain to hold element1 and build it from scratch
chain1 = gst_schedule_chain_new (sched);
gst_schedule_chain_recursive_add (chain1, element1);
// check the other element to see if it landed in the newly created chain
if (gst_schedule_find_chain (sched, element2) == NULL) {
// if not in chain, create chain and build from scratch
chain2 = gst_schedule_chain_new (sched);
gst_schedule_chain_recursive_add (chain2, element2);
}
}
void
gst_schedule_add_element (GstSchedule *sched, GstElement *element)
{
GList *pads;
GstPad *pad;
GstElement *peerelement;
GstScheduleChain *chain;
g_return_if_fail (element != NULL);
g_return_if_fail (GST_IS_ELEMENT(element));
// if it's already in this schedule, don't bother doing anything
if (GST_ELEMENT_SCHED(element) == sched) return;
GST_INFO (GST_CAT_SCHEDULING, "adding element \"%s\" to schedule",
GST_ELEMENT_NAME(element));
// if the element already has a different scheduler, remove the element from it
if (GST_ELEMENT_SCHED(element)) {
gst_schedule_remove_element(GST_ELEMENT_SCHED(element),element);
}
// set the sched pointer in the element itself
GST_ELEMENT_SCHED(element) = sched;
// only deal with elements after this point, not bins
// exception is made for Bin's that are schedulable, like the autoplugger
if (GST_IS_BIN (element) && !GST_FLAG_IS_SET(element, GST_BIN_SELF_SCHEDULABLE)) return;
// first add it to the list of elements that are to be scheduled
sched->elements = g_list_prepend (sched->elements, element);
sched->num_elements++;
// create a chain to hold it, and add
chain = gst_schedule_chain_new (sched);
gst_schedule_chain_add_element (chain, element);
// set the sched pointer in all the pads
pads = element->pads;
while (pads) {
pad = GST_PAD(pads->data);
pads = g_list_next(pads);
// we only operate on real pads
if (!GST_IS_REAL_PAD(pad)) continue;
// set the pad's sched pointer
gst_pad_set_sched (pad, sched);
// if the peer element exists and is a candidate
if (GST_PAD_PEER(pad)) {
peerelement = GST_PAD_PARENT( GST_PAD_PEER (pad) );
if (GST_ELEMENT_SCHED(element) == GST_ELEMENT_SCHED(peerelement)) {
GST_INFO (GST_CAT_SCHEDULING, "peer is in same schedule, chaining together");
// make sure that the two elements are in the same chain
gst_schedule_chain_elements (sched,element,peerelement);
}
}
}
}
void
gst_schedule_enable_element (GstSchedule *sched, GstElement *element)
{
GstScheduleChain *chain;
// find the chain the element's in
chain = gst_schedule_find_chain (sched, element);
if (chain)
gst_schedule_chain_enable_element (chain, element);
else
GST_INFO (GST_CAT_SCHEDULING, "element not found in any chain, not enabling");
}
void
gst_schedule_disable_element (GstSchedule *sched, GstElement *element)
{
GstScheduleChain *chain;
// find the chain the element is in
chain = gst_schedule_find_chain (sched, element);
// remove it from the chain
if (chain) {
gst_schedule_chain_disable_element(chain,element);
}
}
void
gst_schedule_remove_element (GstSchedule *sched, GstElement *element)
{
GstScheduleChain *chain;
g_return_if_fail (element != NULL);
g_return_if_fail (GST_IS_ELEMENT(element));
if (g_list_find (sched->elements, element)) {
GST_INFO (GST_CAT_SCHEDULING, "removing element \"%s\" from schedule",
GST_ELEMENT_NAME(element));
// find what chain the element is in
chain = gst_schedule_find_chain(sched, element);
// remove it from its chain
gst_schedule_chain_remove_element (chain, element);
// remove it from the list of elements
sched->elements = g_list_remove (sched->elements, element);
sched->num_elements--;
// unset the scheduler pointer in the element
GST_ELEMENT_SCHED(element) = NULL;
}
}
gboolean
gst_schedule_iterate (GstSchedule *sched)
{
GstBin *bin = GST_BIN(sched->parent);
GList *chains;
GstScheduleChain *chain;
GstElement *entry;
gint num_scheduled = 0;
gboolean eos = FALSE;
GList *elements;
GST_DEBUG_ENTER("(\"%s\")", GST_ELEMENT_NAME (bin));
g_return_val_if_fail (bin != NULL, TRUE);
g_return_val_if_fail (GST_IS_BIN (bin), TRUE);
// g_return_val_if_fail (GST_STATE (bin) == GST_STATE_PLAYING, TRUE);
// step through all the chains
chains = sched->chains;
// if (chains == NULL) return FALSE;
g_return_val_if_fail (chains != NULL, FALSE);
while (chains) {
chain = (GstScheduleChain *)(chains->data);
chains = g_list_next (chains);
// if (!chain->need_scheduling) continue;
// if (chain->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
GST_DEBUG (GST_CAT_DATAFLOW,"starting iteration via cothreads\n");
if (chain->elements) {
entry = NULL; //MattH ADDED?
GST_DEBUG(GST_CAT_SCHEDULING,"there are %d elements in this chain\n",chain->num_elements);
elements = chain->elements;
while (elements) {
entry = GST_ELEMENT(elements->data);
elements = g_list_next(elements);
if (GST_FLAG_IS_SET(entry,GST_ELEMENT_DECOUPLED)) {
GST_DEBUG(GST_CAT_SCHEDULING,"entry \"%s\" is DECOUPLED, skipping\n",GST_ELEMENT_NAME(entry));
entry = NULL;
} else if (GST_FLAG_IS_SET(entry,GST_ELEMENT_NO_ENTRY)) {
GST_DEBUG(GST_CAT_SCHEDULING,"entry \"%s\" is not valid, skipping\n",GST_ELEMENT_NAME(entry));
entry = NULL;
} else
break;
}
if (entry) {
GST_FLAG_SET (entry, GST_ELEMENT_COTHREAD_STOPPING);
GST_DEBUG (GST_CAT_DATAFLOW,"set COTHREAD_STOPPING flag on \"%s\"(@%p)\n",
GST_ELEMENT_NAME (entry),entry);
cothread_switch (entry->threadstate);
// following is a check to see if the chain was interrupted due to a
// top-half state_change(). (i.e., if there's a pending state.)
//
// if it was, return to gstthread.c::gst_thread_main_loop() to
// execute the state change.
GST_DEBUG (GST_CAT_DATAFLOW,"cothread switch ended or interrupted\n");
if (GST_STATE_PENDING(GST_SCHEDULE(sched)->parent) != GST_STATE_NONE_PENDING)
{
GST_DEBUG (GST_CAT_DATAFLOW,"handle pending state %d\n",
GST_STATE_PENDING(GST_SCHEDULE(sched)->parent));
return 0;
}
} else {
GST_INFO (GST_CAT_DATAFLOW,"NO ENTRY INTO CHAIN!");
}
} else {
GST_INFO (GST_CAT_DATAFLOW,"NO ENABLED ELEMENTS IN CHAIN!!");
}
/*
} else {
GST_DEBUG (GST_CAT_DATAFLOW,"starting iteration via chain-functions\n");
entries = chain->entries;
g_assert (entries != NULL);
while (entries) {
entry = GST_ELEMENT (entries->data);
entries = g_list_next (entries);
GST_DEBUG (GST_CAT_DATAFLOW,"have entry \"%s\"\n",GST_ELEMENT_NAME (entry));
if (GST_IS_BIN (entry)) {
gst_bin_iterate (GST_BIN (entry));
} else {
pads = entry->pads;
while (pads) {
pad = GST_PAD (pads->data);
if (GST_RPAD_DIRECTION(pad) == GST_PAD_SRC) {
GST_DEBUG (GST_CAT_DATAFLOW,"calling getfunc of %s:%s\n",GST_DEBUG_PAD_NAME(pad));
if (GST_REAL_PAD(pad)->getfunc == NULL)
fprintf(stderr, "error, no getfunc in \"%s\"\n", GST_ELEMENT_NAME (entry));
else
buf = (GST_REAL_PAD(pad)->getfunc)(pad);
if (buf) gst_pad_push(pad,buf);
}
pads = g_list_next (pads);
}
}
}
}*/
num_scheduled++;
}
/*
// check if nothing was scheduled that was ours..
if (!num_scheduled) {
// are there any other elements that are still busy?
if (bin->num_eos_providers) {
GST_LOCK (bin);
GST_DEBUG (GST_CATA_DATAFLOW,"waiting for eos providers\n");
g_cond_wait (bin->eoscond, GST_OBJECT(bin)->lock);
GST_DEBUG (GST_CAT_DATAFLOW,"num eos providers %d\n", bin->num_eos_providers);
GST_UNLOCK (bin);
}
else {
gst_element_signal_eos (GST_ELEMENT (bin));
eos = TRUE;
}
}
*/
GST_DEBUG (GST_CAT_DATAFLOW, "leaving (%s)\n", GST_ELEMENT_NAME (bin));
return !eos;
}
void
gst_schedule_show (GstSchedule *sched)
{
GList *chains, *elements;
GstElement *element;
GstScheduleChain *chain;
if (sched == NULL) {
g_print("schedule doesn't exist for this element\n");
return;
}
g_return_if_fail(GST_IS_SCHEDULE(sched));
g_print("SCHEDULE DUMP FOR MANAGING BIN \"%s\"\n",GST_ELEMENT_NAME(sched->parent));
g_print("schedule has %d elements in it: ",sched->num_elements);
elements = sched->elements;
while (elements) {
element = GST_ELEMENT(elements->data);
elements = g_list_next(elements);
g_print("%s, ",GST_ELEMENT_NAME(element));
}
g_print("\n");
g_print("schedule has %d chains in it\n",sched->num_chains);
chains = sched->chains;
while (chains) {
chain = (GstScheduleChain *)(chains->data);
chains = g_list_next(chains);
g_print("%p: ",chain);
elements = chain->disabled;
while (elements) {
element = GST_ELEMENT(elements->data);
elements = g_list_next(elements);
g_print("!%s, ",GST_ELEMENT_NAME(element));
}
elements = chain->elements;
while (elements) {
element = GST_ELEMENT(elements->data);
elements = g_list_next(elements);
g_print("%s, ",GST_ELEMENT_NAME(element));
}
g_print("\n");
}
}
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