/* Gnome-Streamer * Copyright (C) <1999> Erik Walthinsen * * 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", ®ion); 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)); } } } static void gst_schedule_chained_chain (GstBin *bin, _GstBinChain *chain) { GList *elements; GstElement *element; GList *pads; GstPad *pad; DEBUG("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_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; } } } } 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->elements); g_list_free(chain->entries); g_free(chain); } g_list_free(bin->chains); bin->chains = NULL; } 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; gst_bin_schedule_cleanup(bin); // 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->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 // DEBUG("removing '%s' from list of possible elements\n",gst_element_get_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); DEBUG("added '%s' as SRC entry into the chain\n",gst_element_get_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); DEBUG("have pad %s:%s\n",GST_DEBUG_PAD_NAME(pad)); DEBUG("peer pad %p\n", pad->peer); // 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)); // if this is a sink pad, then the element on the other side is an entry if ((gst_pad_get_direction (pad) == GST_PAD_SINK) && (GST_FLAG_IS_SET (pad->peer->parent, GST_ELEMENT_DECOUPLED))) { chain->entries = g_list_prepend (chain->entries, pad->peer->parent); DEBUG("added '%s' as DECOUPLED entry into the chain\n",gst_element_get_name(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->need_cothreads) { gst_schedule_cothreaded_chain (bin,chain); } else { gst_schedule_chained_chain (bin,chain); } } 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; } } } } */